MetLife, Inc. – ‘10-K’ for 12/31/23 – ‘EX-101.DEF’

On:  Thursday, 2/15/24, at 6:42pm ET   ·   As of:  2/16/24   ·   For:  12/31/23   ·   Accession #:  1099219-24-35   ·   File #:  1-15787

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Annual Report   —   Form 10-K   —   SEA’34

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML  15.13M 
 2: EX-4.18     Instrument Defining the Rights of Security Holders  HTML    295K 
 3: EX-10.10    Material Contract                                   HTML     78K 
 4: EX-10.21 16  Material Contract                                  HTML     71K 
 5: EX-10.24 9  Material Contract                                   HTML     70K 
 6: EX-10.27 1  Material Contract                                   HTML    150K 
 7: EX-21.1     Subsidiaries List                                   HTML    227K 
 8: EX-23.1     Consent of Expert or Counsel                        HTML     69K 
13: EX-97.1     Clawback Policy re: Recovery of Erroneously         HTML     90K 
                Awarded Compensation                                             
 9: EX-31.1     Certification -- §302 - SOA'02                      HTML     73K 
10: EX-31.2     Certification -- §302 - SOA'02                      HTML     73K 
11: EX-32.1     Certification -- §906 - SOA'02                      HTML     70K 
12: EX-32.2     Certification -- §906 - SOA'02                      HTML     70K 
19: R1          Document and Entity Information                     HTML    153K 
20: R2          Audit Information                                   HTML     75K 
21: R3          Consolidated Balance Sheets                         HTML    222K 
22: R4          Consolidated Balance Sheets (Parenthetical)         HTML    108K 
23: R5          Consolidated Statements of Operations               HTML    182K 
24: R6          Consolidated Statements Of Comprehensive Income     HTML    131K 
25: R7          Consolidated Statements of Equity                   HTML    139K 
26: R8          Consolidated Statements of Cash Flows               HTML    246K 
27: R9          Statement of Cash Flows (Statement)                 HTML     71K 
                (Parenthetical)                                                  
28: R10         Business, Basis of Presentation and Summary of      HTML    655K 
                Significant Accounting Policies                                  
29: R11         Segment Information                                 HTML    457K 
30: R12         Dispositions - Dispositions                         HTML     77K 
31: R13         Future Policy Benefits                              HTML   1.25M 
32: R14         Policyholder Account Balances                       HTML    748K 
33: R15         Market Risk Benefits                                HTML    748K 
34: R16         Separate Account                                    HTML    346K 
35: R17         Deferred Policy Acquisition Costs, Value of         HTML    339K 
                Business Acquired and Other Policy-Related                       
                Intangibles                                                      
36: R18         Reinsurance                                         HTML    185K 
37: R19         Closed Block                                        HTML    141K 
38: R20         Investments                                         HTML    812K 
39: R21         Derivatives                                         HTML    649K 
40: R22         Fair Value                                          HTML    691K 
41: R23         Leases Leases                                       HTML    103K 
42: R24         Goodwill                                            HTML    153K 
43: R25         Long-term and Short-term Debt                       HTML    151K 
44: R26         Collateral Financing Arrangements                   HTML     84K 
45: R27         Junior Subordinated Debt Securities                 HTML    108K 
46: R28         Equity                                              HTML    463K 
47: R29         Other Revenues and Other Expenses                   HTML    113K 
48: R30         Employee Benefit Plans                              HTML    471K 
49: R31         Income Tax                                          HTML    176K 
50: R32         Earnings Per Common Share                           HTML     95K 
51: R33         Contingencies, Commitments and Guarantees           HTML    100K 
52: R34         Quarterly Results of Operations (Unaudited)         HTML    141K 
53: R35         Consolidated Summary of Investments - Other Than    HTML    111K 
                Investments in Related Parties                                   
54: R36         Condensed Financial Information (Parent Company)    HTML    256K 
55: R37         Consolidated Supplementary Insurance Information    HTML    222K 
56: R38         Consolidated Reinsurance                            HTML    125K 
57: R39         Pay vs Performance Disclosure                       HTML     82K 
58: R40         Insider Trading Arrangements                        HTML     93K 
59: R41         Business, Basis of Presentation and Summary of      HTML    758K 
                Significant Accounting Policies (Policies)                       
60: R42         Organization, Consolidation and Presentation of     HTML    667K 
                Financial Statements (Tables)                                    
61: R43         Segment Information (Tables)                        HTML    437K 
62: R44         Future Policy Benefits (Tables)                     HTML   1.71M 
63: R45         Policyholder Account Balances (Tables)              HTML   1.17M 
64: R46         Market Risk Benefits (Tables)                       HTML    777K 
65: R47         Separate Account (Tables)                           HTML    347K 
66: R48         Deferred Policy Acquisition Costs, Value of         HTML    976K 
                Business Acquired and Other Policy-Related                       
                Intangibles (Tables)                                             
67: R49         Reinsurance (Tables)                                HTML    169K 
68: R50         Closed Block (Tables)                               HTML    139K 
69: R51         Investments (Tables)                                HTML    809K 
70: R52         Derivatives (Tables)                                HTML    632K 
71: R53         Fair Value (Tables)                                 HTML    604K 
72: R54         Leases Leases (Tables)                              HTML    103K 
73: R55         Goodwill (Tables)                                   HTML    155K 
74: R56         Long-term and Short-term Debt (Tables)              HTML    130K 
75: R57         Collateral Financing Arrangements Collateral        HTML     80K 
                Financing Arrangements (Tables)                                  
76: R58         Junior Subordinated Debt Securities (Tables)        HTML    108K 
77: R59         Equity (Tables)                                     HTML    433K 
78: R60         Other Revenues and Other Expenses (Tables)          HTML    112K 
79: R61         Employee Benefit Plans (Tables)                     HTML    675K 
80: R62         Income Tax (Tables)                                 HTML    179K 
81: R63         Earnings Per Common Share (Tables)                  HTML     94K 
82: R64         Contingencies, Commitments and Guarantees (Tables)  HTML     83K 
83: R65         Quarterly Results of Operations (Unaudited)         HTML    140K 
                (Tables)                                                         
84: R66         Business, Basis of Presentation and Summary of      HTML     87K 
                Significant Accounting Policies -Upper-Medium                    
                Grade Discount Rate (Details)                                    
85: R67         Business, Basis of Presentation and Summary of      HTML    115K 
                Significant Accounting Policies - Future Adoption                
                (Details)                                                        
86: R68         Business, Basis of Presentation and Summary of      HTML    177K 
                Significant Accounting Policies - Summary Matrix                 
                (Details)                                                        
87: R69         Business, Basis of Presentation and Summary of      HTML    199K 
                Significant Accounting Policies - Transition Table               
                - Balance Sheet (Details)                                        
88: R70         Business, Basis of Presentation and Summary of      HTML    227K 
                Significant Accounting Policies - Transition Table               
                - Income Statement (Details)                                     
89: R71         Business, Basis of Presentation and Summary of      HTML    220K 
                Significant Accounting Policies - Transition Table               
                - SOE (Details)                                                  
90: R72         Business, Basis of Presentation and Summary of      HTML    181K 
                Significant Accounting Policies - Transition Table               
                - SCF (Details)                                                  
91: R73         Business, Basis of Presentation and Summary of      HTML    172K 
                Significant Accounting Policies - Transition Table               
                - SOCI (Details)                                                 
92: R74         Business, Basis of Presentation and Summary of      HTML    157K 
                Significant Accounting Policies - Narrative                      
                (Details)                                                        
93: R75         Segment Information (Earnings) (Details)            HTML    335K 
94: R76         Segment Information (Total Assets) (Details)        HTML    112K 
95: R77         Segment Information (Product Table) (Details)       HTML     80K 
96: R78         Segment Information (Premiums, Fees and Other       HTML     78K 
                Revenues by US and Foreign Operations) (Details)                 
97: R79         Segment Information (Narrative) (Details)           HTML    141K 
98: R80         Pending Disposition of MetLife Malaysia (Details)   HTML     74K 
99: R81         Disposition of MetLife Seguros S.A. (Details)       HTML     87K 
100: R82         Disposition of MetLife Poland and Greece -          HTML     87K  
                Narrative (Details)                                              
101: R83         Disposition of Metropolitan Property and Casualty   HTML     99K  
                Insurance Company - Narrative (Details)                          
102: R84         Future Policy Benefits - Transition Tables          HTML    260K  
                (Details)                                                        
103: R85         Future Policy Benefits - FPB on Balance Sheet       HTML    103K  
                (Details)                                                        
104: R86         Future Policy Benefits - Disaggregate Rollforwards  HTML    252K  
                (Details)                                                        
105: R87         Future Policy Benefits - Narrative (Details)        HTML     73K  
106: R88         Future Policy Benefits - FPB - Additional           HTML    125K  
                Insurance Liabilities (Details)                                  
107: R89         Future Policy Benefits - FPB Income Statement       HTML    111K  
                (Details)                                                        
108: R90         Future Policy Benefits - Participating Business -   HTML     74K  
                Narrative (Details)                                              
109: R91         Future Policy Benefits (Liabilities for Unpaid      HTML    332K  
                Claims and Claims Expense - Development Tables)                  
                (Details)                                                        
110: R92         Future Policy Benefits (Short-Duration Contracts    HTML    116K  
                Historical Claims) (Details)                                     
111: R93         Future Policy Benefits (Liabilities for Unpaid      HTML     94K  
                Claims - Methodology) (Details)                                  
112: R94         Future Policy Benefits (Reconciliation of           HTML    115K  
                Disclosure to Liability) (Details)                               
113: R95         Future Policy Benefits (Rollforward of Unpaid       HTML    104K  
                Claims) (Details)                                                
114: R96         Policyholder Account Balances - Transition Table    HTML    173K  
                (Details)                                                        
115: R97         Policyholder Account Balances - Amounts on Balance  HTML    100K  
                Sheet (Details)                                                  
116: R98         Policyholder Account Balances - LDTI Rollforward    HTML    161K  
                (Details)                                                        
117: R99         Policyholder Account Balances - Range of            HTML    347K  
                Guaranteed Minimum Crediting Rate (Details)                      
118: R100        Policyholder Account Balances - Narrative           HTML     81K  
                (Details)                                                        
119: R101        Market Risk Benefits - Transition Adjustments       HTML    123K  
                (Details)                                                        
120: R102        Market Risk Benefits - Balance Sheet (Details)      HTML     90K  
121: R103        Market Risk Benefits - Rollforward (Details)        HTML    147K  
122: R104        Separate Account Liabilities Balance Sheet          HTML     91K  
                (Details)                                                        
123: R105        Separate Account Liabilities Rollforward (Details)  HTML    119K  
124: R106        Separate Account Assets Fair Value (Details)        HTML    326K  
125: R107        Separate Accounts - Narrative (Details)             HTML     82K  
126: R108        Deferred Policy Acquisition Costs, Value of         HTML    179K  
                Business Acquired and Other Policy-Related                       
                Intangibles - Transition Table (Details)                         
127: R109        Deferred Policy Acquisition Costs, Value of         HTML    188K  
                Business Acquired and Other Policy-Related                       
                Intangibles (DAC and VOBA) (Details)                             
128: R110        Deferred Policy Acquisition Costs, Value of         HTML     88K  
                Business Acquired and Other Policy-Related                       
                Intangibles (DAC and VOBA by Segment) (Details)                  
129: R111        Deferred Policy Acquisition Costs, Value of         HTML     81K  
                Business Acquired and Other Policy-Related                       
                Intangibles (VODA and VOCRA) (Details)                           
130: R112        Deferred Policy Acquisition Costs, Value of         HTML     78K  
                Business Acquired and Other Policy-Related                       
                Intangibles (Negative VOBA) (Details)                            
131: R113        Deferred Policy Acquisition Costs, Value of         HTML    107K  
                Business Acquired and Other Policy-Related                       
                Intangibles (Estimated Future Amortization)                      
                (Details)                                                        
132: R114        Deferred Policy Acquisition Costs, Value of         HTML     97K  
                Business Acquired and Other Policy-Related                       
                Intangibles - Unearned Revenue (Details)                         
133: R115        Reinsurance (Effects of Reinsurance on Earnings)    HTML    128K  
                (Details)                                                        
134: R116        Reinsurance (Effects of Reinsurance on Balance      HTML    115K  
                Sheet) (Details)                                                 
135: R117        Reinsurance (Narrative) (Details)                   HTML    115K  
136: R118        Closed Block (Liabilities and Assets) (Details)     HTML    128K  
137: R119        Closed Block (Policyholder Dividend Obligation)     HTML     75K  
                (Details)                                                        
138: R120        Closed Block (Revenues and Expenses) (Details)      HTML     97K  
139: R121        Investments (Fixed Maturity Securities              HTML    117K  
                Available-For-Sale by Sector) (Details)                          
140: R122        Investments (Maturities of Fixed Maturity           HTML    101K  
                Securities) (Details)                                            
141: R123        Investments (Continuous Gross Unrealized Losses     HTML    124K  
                for Fixed Maturity Securities Available-For-Sale)                
                (Details)                                                        
142: R124        Investments (ACL for Fixed Maturity Securities AFS  HTML    112K  
                by Sector) (Details)                                             
143: R125        Investments (Equity Securities) (Details)           HTML     84K  
144: R126        Investments (Contractholder-Directed Equity         HTML     83K  
                Securities and FVO Securities) (Details)                         
145: R127        Investments (Mortgage Loans by Portfolio Segment)   HTML    117K  
                (Details)                                                        
146: R128        Investments (Mortgage Loans Allowance for Credit    HTML     94K  
                Loss Rollforward by Portfolio Segment) (Details)                 
147: R129        Investments (Modifications to Borrowers             HTML     81K  
                Experiencing Financial Difficulty) (Details)                     
148: R130        Investments (Credit Quality of Commercial Mortgage  HTML    133K  
                Loans) (Details)                                                 
149: R131        Investments (Credit Quality of Agricultural and     HTML    137K  
                Residential Mortgage Loans) (Details)                            
150: R132        Investments (Past Due and Interest Accrual Status   HTML     93K  
                of Mortgage Loans) (Details)                                     
151: R133        Investments (Real Estate and Real Estate Joint      HTML     95K  
                Ventures) (Details)                                              
152: R134        Investments (Leased Real Estate Investments -       HTML     94K  
                Operating Leases) (Details)                                      
153: R135        Investments (Concentrations of Credit Risk)         HTML     78K  
                (Details)                                                        
154: R136        Investments (Securities Lending and Repurchase      HTML     86K  
                Agreements) (Details)                                            
155: R137        Investments (Securities Lending and Repurchase      HTML    109K  
                Agreements Remaining Tenor ) (Details)                           
156: R138        Investments (Invested Assets on Deposit, Held In    HTML     80K  
                Trust and Pledged as Collateral) (Details)                       
157: R139        Investments (Consolidated Variable Interest         HTML     96K  
                Entities) (Details)                                              
158: R140        Investments (Unconsolidated Variable Interest       HTML     95K  
                Entities) (Details)                                              
159: R141        Investments (Net Investment Income) (Details)       HTML    105K  
160: R142        Investments (Supplemental Net Investment Income)    HTML     91K  
                (Details)                                                        
161: R143        Investments (Components of Net Investment Gains     HTML     97K  
                Losses - Asset Type) (Details)                                   
162: R144        Investments (Components of Net Investment Gains     HTML    100K  
                Losses - Transaction Type) (Details)                             
163: R145        Investments (Supplemental Net Investment Gains      HTML     88K  
                (Losses)) (Details)                                              
164: R146        Investments (Fixed Maturity Securities AFS - Sales  HTML    101K  
                and Disposals and Credit Loss) (Details)                         
165: R147        Investments (Evaluation of Fixed Maturity           HTML     86K  
                Securities AFS in an Unrealized Loss Position -                  
                Narrative) (Details)                                             
166: R148        Investments (Mortgage Loans - Narrative) (Details)  HTML    106K  
167: R149        Investments (Real Estate and Real Estate Joint      HTML     76K  
                Ventures - Narrative) (Details)                                  
168: R150        Investments (Operating Leases - Narrative)          HTML     84K  
                (Details)                                                        
169: R151        Investments (Other Invested Assets - Narrative)     HTML     73K  
                (Details)                                                        
170: R152        Investments (Cash Equivalents - Narrative)          HTML     72K  
                (Details)                                                        
171: R153        Investments (Invested Assets on Deposit, Held in    HTML     71K  
                Trust and Pledged as Collateral - Narrative)                     
                (Details)                                                        
172: R154        Investments (Collectively Significant Equity        HTML    113K  
                Method Investments - Narrative) (Details)                        
173: R155        Derivatives (Primary Risks) (Details)               HTML    178K  
174: R156        Derivatives Derivatives (Effects on the             HTML    187K  
                Consolidated Statement of Operations and                         
                Comprehensive Income (Loss)) (Details)                           
175: R157        Derivatives (Fair Value Hedges) (Details)           HTML     86K  
176: R158        Derivatives (Cash Flow Hedges) (Details)            HTML     76K  
177: R159        Derivatives (Hedges of Net Investments in Foreign   HTML     74K  
                Operations) (Details)                                            
178: R160        Derivatives (Credit Derivatives) (Details)          HTML    106K  
179: R161        Derivatives (Estimated Fair Value of Derivative     HTML    123K  
                Assets and Liabilities after Master Netting                      
                Agreements and Cash Collateral) (Details)                        
180: R162        Derivatives (Credit Risk on Freestanding            HTML     93K  
                Derivatives) (Details)                                           
181: R163        Derivatives (Embedded Derivatives) (Details)        HTML     78K  
182: R164        Derivatives (Narrative) (Details)                   HTML    135K  
183: R165        Fair Value (Recurring Fair Value Measurements)      HTML    239K  
                (Details)                                                        
184: R166        Fair Value (Quantitative Information) (Details)     HTML    172K  
185: R167        Fair Value (Unobservable Input Reconciliation)      HTML    208K  
                (Details)                                                        
186: R168        Fair Value (Nonrecurring Fair Value Measurements)   HTML     88K  
                (Details)                                                        
187: R169        Fair Value (Financial Instruments Carried at Other  HTML    122K  
                Than Fair Value) (Details)                                       
188: R170        Leases Lease Costs (Details)                        HTML     78K  
189: R171        Leases Leases (Details)                             HTML    108K  
190: R172        Leases Leases - (Narrative) (Details)               HTML     81K  
191: R173        Goodwill (Details)                                  HTML    120K  
192: R174        Long-term and Short-term Debt (Long-term and        HTML    132K  
                Short-term Outstanding) (Details)                                
193: R175        Long-term and Short-term Debt (Short-term with      HTML     81K  
                Maturities of Year or Less) (Details)                            
194: R176        Long-term and Short-term Debt (Credit Facilities)   HTML     90K  
                (Details)                                                        
195: R177        Long-term and Short-term Debt (Committed            HTML     99K  
                Facilities) (Details)                                            
196: R178        Long-term and Short-term Debt (Narrative)           HTML    169K  
                (Details)                                                        
197: R179        Long-term and Short-term Debt Long-term and         HTML     96K  
                Short-term Debt (Narrative - Line of Credit)                     
                (Details)                                                        
198: R180        Collateral Financing Arrangements Collateral        HTML     97K  
                Financing Arrangements (Associated with Closed                   
                Block) (Details)                                                 
199: R181        Collateral Financing Arrangements (Narrative)       HTML    106K  
                (Details)                                                        
200: R182        Junior Subordinated Debt Securities (Junior         HTML    108K  
                Subordinated Debt Securities) (Details)                          
201: R183        Junior Subordinated Debt Securities (Narrative)     HTML    106K  
                (Details)                                                        
202: R184        Equity - Preferred Stock (Details)                  HTML    116K  
203: R185        Equity - Preferred Stock Narrative (Details)        HTML    178K  
204: R186        Equity - Common Stock (Details)                     HTML     75K  
205: R187        Equity - Common Stock Narrative (Details)           HTML    106K  
206: R188        Equity - Stock-Based Compensation Plans Narrative   HTML    116K  
                (Details)                                                        
207: R189        Equity - Compensation Expense Related to            HTML     89K  
                Stock-Based Compensation for Phantom Stock-Based                 
                Awards (Details)                                                 
208: R190        Equity - Unrecognized Compensation Expense Related  HTML     88K  
                to Stock-Based Compensation (Details)                            
209: R191        Equity - Summary of Activity Related to Stock       HTML    129K  
                Options (Details)                                                
210: R192        Equity - Weighted Average Assumptions Used to       HTML    102K  
                Determine Fair Value of Stock Options (Details)                  
211: R193        Equity - Summary of Stock Option Exercise Activity  HTML     76K  
                (Details)                                                        
212: R194        Equity - Performance Share and Restricted Stock     HTML    106K  
                Unit (Details)                                                   
213: R195        Equity - Liability Award Activity (Details)         HTML    106K  
214: R196        Equity - Statutory Equity & Income Narrative        HTML     96K  
                (Details)                                                        
215: R197        Equity - Statutory Net Income (Loss) and Capital &  HTML     84K  
                Surplus (Details)                                                
216: R198        Equity - Dividend Restrictions (Details)            HTML     84K  
217: R199        Equity - Components of Accumulated Other            HTML    179K  
                Comprehensive Income (Loss) (Details)                            
218: R200        Equity - Reclassifications Out of Accumulated       HTML    149K  
                Other Comprehensive Income (Loss) (Details)                      
219: R201        Other Revenues and Other Expenses Other Revenues    HTML     96K  
                (Details)                                                        
220: R202        Other Revenues and Other Expenses Other Revenues    HTML     72K  
                (Narrative) (Details)                                            
221: R203        Other Expenses (Other Expenses) (Details)           HTML     95K  
222: R204        Employee Benefit Plans Employee Benefit Plans       HTML     97K  
                (Obligations, Funded Status, and Periodic Benefit                
                Costs) (Details)                                                 
223: R205        Employee Benefit Plans (Obligations and Funded      HTML    165K  
                Status) (Details)                                                
224: R206        Employee Benefit Plans (Paid Benefit Obligations    HTML     91K  
                and Accumulated Benefit Obligations in Excess of                 
                Fair Value) (Details)                                            
225: R207        Employee Benefit Plans (Net Periodic Benefit Costs  HTML    128K  
                and Other Changes Recognized in OCI) (Details)                   
226: R208        Employee Benefit Plans (Assumptions in Determining  HTML     85K  
                Benefit Obligations) (Details)                                   
227: R209        Employee Benefit Plans (Assumptions in Determining  HTML     89K  
                Net Periodic Benefit Costs) (Details)                            
228: R210        Employee Benefit Plans (Assumed Healthcare Cost     HTML     81K  
                Trend Rates) (Details)                                           
229: R211        Employee Benefit Plans (Actual & Target Allocation  HTML     90K  
                of Fair Value by Asset Class) (Details)                          
230: R212        Employee Benefit Plans (Estimated Fair Value on a   HTML    206K  
                Recurring Basis) (Details)                                       
231: R213        Employee Benefit Plans (Significant Unobservable    HTML    134K  
                Inputs) (Details)                                                
232: R214        Employee Benefit Plans (Expected Gross Benefit      HTML     87K  
                Payments) (Details)                                              
233: R215        Employee Benefit Plans (Narrative) (Details)        HTML     98K  
234: R216        Income Tax (Provision for Income Tax from           HTML     99K  
                Continuing Operations) (Details)                                 
235: R217        Income Tax (Income Loss from Continuing Operations  HTML     80K  
                Before Income Tax Expense from Domestic and                      
                Foreign Operations) (Details)                                    
236: R218        Income Tax (Reconciliation of Income Tax Provision  HTML    126K  
                between US Statutory Rate and As Reported for                    
                Continuing Operations) (Details)                                 
237: R219        Income Tax (Net Deferred Income Tax Assets and      HTML    121K  
                Liabilities) (Details)                                           
238: R220        Income Tax (Reconciliation of Unrecognized Tax      HTML     86K  
                Benefits) (Details)                                              
239: R221        Income Tax (Interest Accrued Related to             HTML     78K  
                Unrecognized Tax Benefits) (Details)                             
240: R222        Income Tax (Narrative) (Details)                    HTML     87K  
241: R223        Earnings Per Common Share (Earnings Per Common      HTML    122K  
                Share) (Details)                                                 
242: R224        Contingencies, Commitments and Guarantees           HTML     82K  
                (Asbestos Claims) (Details)                                      
243: R225        Contingencies, Commitments and Guarantees           HTML     75K  
                (Contingencies - Narrative) (Details)                            
244: R226        Contingencies, Commitments and Guarantees           HTML     87K  
                (Commitments and Guarantees - Narrative) (Details)               
245: R227        Quarterly Results of Operations (Unaudited)         HTML    141K  
                (Details)                                                        
246: R228        Consolidated Summary of Investments - Other Than    HTML    135K  
                Investments in Related Parties (Details)                         
247: R229        Condensed Financial Information (Parent Company)    HTML    189K  
                (Condensed Balance Sheet) (Details)                              
248: R230        Condensed Financial Information (Parent Company)    HTML     94K  
                (Condensed Balance Sheet - Insets) (Details)                     
249: R231        Condensed Financial Information (Parent Company)    HTML    156K  
                (Condensed Statements of Operations) (Details)                   
250: R232        Condensed Financial Information (Parent Company)    HTML    212K  
                (Condensed Statements of Cash Flows) (Details)                   
251: R233        Condensed Financial Information (Parent Company)    HTML     75K  
                (Investment in Subsidiaries - Narrative) (Details)               
252: R234        Condensed Financial Information (Parent Company)    HTML     89K  
                (Loans to Subsidiaries - Narrative) (Details)                    
253: R235        Condensed Financial Information (Parent Company)    HTML    146K  
                (Long-term Debt Outstanding) (Details)                           
254: R236        Condensed Financial Information (Parent Company)    HTML     83K  
                (Interest Expense) (Details)                                     
255: R237        Condensed Financial Information (Parent Company)    HTML    103K  
                (Long-term Debt - Narrative) (Details)                           
256: R238        Condensed Financial Information (Parent Company)    HTML     96K  
                (Support Agreements - Narrative) (Details)                       
257: R239        Consolidated Supplementary Insurance Information    HTML    127K  
                (Balance Sheet Items) (Details)                                  
258: R240        Consolidated Supplementary Insurance Information    HTML    119K  
                (Income Statement Items) (Details)                               
259: R241        Consolidated Reinsurance (Consolidated              HTML    110K  
                Reinsurance) (Details)                                           
260: R9999       Uncategorized Items - met-20231231.htm              HTML     93K  
262: XML         IDEA XML File -- Filing Summary                      XML    534K  
265: XML         XBRL Instance -- met-20231231_htm                    XML  27.72M  
261: EXCEL       IDEA Workbook of Financial Report Info              XLSX    937K  
15: EX-101.CAL  XBRL Calculations -- met-20231231_cal                XML    438K 
16: EX-101.DEF  XBRL Definitions -- met-20231231_def                 XML   4.32M 
17: EX-101.LAB  XBRL Labels -- met-20231231_lab                      XML   6.88M 
18: EX-101.PRE  XBRL Presentations -- met-20231231_pre               XML   5.46M 
14: EX-101.SCH  XBRL Schema -- met-20231231                          XSD    669K 
263: JSON        XBRL Instance as JSON Data -- MetaLinks            1,577±  2.58M  
264: ZIP         XBRL Zipped Folder -- 0001099219-24-000035-xbrl      Zip   2.38M  

‘EX-101.DEF’   —   XBRL Definitions — met-20231231_def

This Exhibit is an XBRL File.