Document/ExhibitDescriptionPagesSize
1: 10-K Annual Report HTML 7.62M
2: EX-10.10 Ameren's Deferred Compensation Plan as Amended HTML 131K
3: EX-10.15 2024 Ameren Executive Incentive Plan HTML 104K
4: EX-10.19 2024 Base Salary Table for Named Executive HTML 52K
Officers
5: EX-10.22 Revised Change of Control Severance Plan HTML 50K
6: EX-10.29 Formula for Determining 2024 Target Performance HTML 50K
Share Unit Awards
7: EX-10.45 2024 Performance Share Unit Award Agreement - HTML 102K
Shareholder Return Metric
8: EX-10.46 2024 Performance Share Unit Award Agreement - HTML 95K
Clean Energy Transition Metric
9: EX-10.47 2024 Restricted Stock Unit Award Agreement HTML 85K
10: EX-10.48 Performance-Based Restricted Share Unit Award HTML 98K
Agreement
11: EX-10.52 Second Amendment and Restated Ameren Supplemental HTML 48K
Retirement Plan
12: EX-10.53 Third Amendment and Restated Ameren Supplemental HTML 49K
Retirement Plan
13: EX-10.54 Fourth Amendment and Restated Ameren Supplemental HTML 49K
Retirement Plan
14: EX-10.55 Fifth Amendment and Restated Ameren Supplemental HTML 53K
Retirement Plan
15: EX-21.1 Subsidiaries of Ameren HTML 48K
16: EX-23.1 Consent of Independent Registered Public HTML 43K
Accounting Firm
17: EX-23.2 Consent of Independent Registered Public HTML 43K
Accounting Firm
18: EX-23.3 Consent of Independent Registered Public HTML 43K
Accounting Firm
19: EX-24.1 Power of Attorney HTML 48K
20: EX-24.2 Power of Attorney HTML 46K
21: EX-24.3 Power of Attorney HTML 45K
31: EX-97.1 Ameren Corporation Financial Restatement HTML 70K
Compensation Recoupment Policy
22: EX-31.1 Certification -- §302 - SOA'02 HTML 47K
23: EX-31.2 Certification -- §302 - SOA'02 HTML 48K
24: EX-31.3 Certification -- §302 - SOA'02 HTML 48K
25: EX-31.4 Certification -- §302 - SOA'02 HTML 48K
26: EX-31.5 Certification -- §302 - SOA'02 HTML 48K
27: EX-31.6 Certification -- §302 - SOA'02 HTML 48K
28: EX-32.1 Certification -- §906 - SOA'02 HTML 45K
29: EX-32.2 Certification -- §906 - SOA'02 HTML 45K
30: EX-32.3 Certification -- §906 - SOA'02 HTML 45K
37: R1 Cover Page HTML 135K
38: R2 Audit Information HTML 54K
39: R3 Consolidated Statement Of Income (Loss) HTML 178K
40: R4 Consolidated Statement Of Income (Loss) HTML 46K
(Parenthetical)
41: R5 Consolidated Balance Sheet HTML 183K
42: R6 Consolidated Balance Sheet (Parenthetical) HTML 54K
43: R7 Consolidated Balance Sheet - UE HTML 193K
44: R8 Consolidated Balance Sheet - UE (Parenthetical) HTML 57K
45: R9 Consolidated Balance Sheet - AIC HTML 192K
46: R10 Consolidated Balance Sheet - AIC (Parenthetical) HTML 57K
47: R11 Consolidated Statement Of Cash Flows HTML 195K
48: R12 Consolidated Statement Of Cash Flows HTML 50K
(Parenthetical)
49: R13 Consolidated Statement Of Stockholders' Equity HTML 184K
50: R14 Summary Of Significant Accounting Policies HTML 82K
51: R15 Rate And Regulatory Matters HTML 317K
52: R16 Property And Plant, Net HTML 166K
53: R17 Short-Term Debt And Liquidity HTML 93K
54: R18 Long-Term Debt And Equity Financings HTML 254K
55: R19 Other Income, Net HTML 94K
56: R20 Derivative Financial Instruments HTML 219K
57: R21 Fair Value Measurements HTML 348K
58: R22 Callaway Energy Center HTML 112K
59: R23 Retirement Benefits HTML 446K
60: R24 Stock-Based Compensation HTML 101K
61: R25 Income Taxes HTML 228K
62: R26 Related Party Transactions HTML 136K
63: R27 Commitments And Contingencies HTML 75K
64: R28 Supplemental Information HTML 228K
65: R29 Segment Information HTML 434K
66: R30 Schedule I - Condensed Financial Information Of HTML 224K
Parent
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68: R32 Insider Trading Arrangements HTML 50K
69: R33 Summary Of Significant Accounting Policies HTML 142K
(Policies)
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71: R35 Property And Plant, Net (Tables) HTML 170K
72: R36 Short-Term Debt And Liquidity (Tables) HTML 84K
73: R37 Long-Term Debt And Equity Financings (Tables) HTML 247K
74: R38 Other Income, Net (Tables) HTML 104K
75: R39 Derivative Financial Instruments (Tables) HTML 217K
76: R40 Fair Value Measurements (Tables) HTML 346K
77: R41 Callaway Energy Center (Tables) HTML 111K
78: R42 Retirement Benefits (Tables) HTML 451K
79: R43 Stock-Based Compensation (Tables) HTML 94K
80: R44 Income Taxes (Tables) HTML 229K
81: R45 Related Party Transactions (Tables) HTML 130K
82: R46 Supplemental Information (Tables) HTML 237K
83: R47 Segment Information (Tables) HTML 431K
84: R48 Summary Of Significant Accounting Policies HTML 102K
(Narrative) (Details)
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Framework-Missouri) (Details)
86: R50 Rate and Regulatory Matters (Regulatory HTML 76K
Framework-Illinois) (Details)
87: R51 Rate and Regulatory Matters (Regulatory HTML 51K
Framework-Federal) (Details)
88: R52 Rate and Regulatory Matters (Narrative-Missouri) HTML 119K
(Details)
89: R53 Rate And Regulatory Matters (Narrative-Illinois) HTML 121K
(Details)
90: R54 Rate and Regulatory Matters (Narrative-Federal) HTML 70K
(Details)
91: R55 Rate And Regulatory Matters (Schedule Of HTML 236K
Regulatory Assets And Liabilities) (Details)
92: R56 Property And Plant, Net (Schedule Of Property And HTML 142K
Plant, Net) (Details)
93: R57 Property and Plant, Net (Schedule of Capitalized HTML 80K
Software and Deferred Cloud Implementation Costs)
(Details)
94: R58 Property and Plant, Net (Schedule of Capitalized HTML 63K
Software, Future Amortization Expense) (Details)
95: R59 Short-Term Debt And Liquidity (Narrative) HTML 78K
(Details)
96: R60 Short-Term Debt And Liquidity (Schedule Of Maximum HTML 57K
Aggregate Amount Available On Credit Agreements)
(Details)
97: R61 Short-Term Debt And Liquidity (Commercial Paper) HTML 65K
(Details)
98: R62 Long-Term Debt And Equity Financings (Schedule Of HTML 262K
Long-Term Debt Outstanding) (Details)
99: R63 Long-Term Debt And Equity Financings (Schedule Of HTML 121K
Maturities Of Long-Term Debt) (Details)
100: R64 Long-Term Debt And Equity Financings (Schedule Of HTML 134K
Outstanding Preferred Stock) (Details)
101: R65 Long-Term Debt And Equity Financings (Narrative) HTML 245K
(Details)
102: R66 Long-Term Debt and Equity Financings (Schedule of HTML 70K
Required and Actual Debt Ratios) (Details)
103: R67 Other Income, Net (Other Income And Expenses) HTML 80K
(Details)
104: R68 Derivative Financial Instruments (Open Gross HTML 67K
Derivative Volumes By Commodity Type) (Details)
105: R69 Derivative Financial Instruments (Derivative HTML 107K
Instruments Carrying Value) (Details)
106: R70 Derivative Financial Instruments (Offsetting HTML 88K
Assets and Liabilities) (Details)
107: R71 Derivative Financial Instruments (Credit Risk) HTML 55K
(Details)
108: R72 Fair Value Measurements (Schedule Of Fair Value HTML 152K
Hierarchy Of Assets And Liabilities Measured At
Fair Value On Recurring Basis) (Details)
109: R73 Fair Value Measurements (Schedule Of Changes In HTML 66K
The Fair Value Of Financial Assets And Liabilities
Classified As Level 3 In The Fair Value Hierarchy)
(Details)
110: R74 Fair Value Measurements (Schedule of Valuation HTML 79K
Process and Unobservable Inputs) (Details)
111: R75 Fair Value Measurements (Schedule Of Carrying HTML 147K
Amounts And Estimated Fair Values Of Financial
Assets and Liabilities) (Details)
112: R76 Callaway Energy Center (Narrative) (Details) HTML 56K
113: R77 Callaway Energy Center (Proceeds From The Sale Of HTML 53K
Investments And Related Gross Realized Gains And
Losses In Nuclear Decommissioning Trust Fund)
(Details)
114: R78 Callaway Energy Center (Fair Values Of Investments HTML 104K
In Debt And Equity Securities In Nuclear
Decommissioning Trust Fund) (Details)
115: R79 Callaway Energy Center (Cost and Fair Values of HTML 65K
Investments In Debt Securities in Nuclear
Decommissioning Trust Fund According to
Contractual Maturities) (Details)
116: R80 Callaway Energy Center (Insurance Disclosure) HTML 85K
(Details)
117: R81 Retirement Benefits (Narrative) (Details) HTML 72K
118: R82 Retirement Benefits (Summary Of Benefit Liability HTML 50K
Recorded) (Details)
119: R83 Retirement Benefits (Funded Status Of Benefit HTML 127K
Plans And Amounts Included In Regulatory Assets
And OCI) (Details)
120: R84 Retirement Benefits (Assumptions Used To Determine HTML 81K
Benefit Obligations) (Details)
121: R85 Retirement Benefits (Cash Contributions Made To HTML 62K
Benefit Plans) (Details)
122: R86 Retirement Benefits (Target Allocation Of The HTML 121K
Plans' Asset Categories) (Details)
123: R87 Retirement Benefits (Fair Value Of Plan Assets HTML 177K
Utilizing Fair Value Hierarchy) (Details)
124: R88 Retirement Benefits (Components Of Net Periodic HTML 77K
Benefit Cost) (Details)
125: R89 Retirement Benefits (Summary Of Benefit Plan Costs HTML 61K
Incurred) (Details)
126: R90 Retirement Benefits (Schedule Of Expected Payments HTML 68K
From Qualified Trust And Company Funds) (Details)
127: R91 Retirement Benefits (Assumptions Used To Determine HTML 84K
Net Periodic Benefit Cost) (Details)
128: R92 Retirement Benefits (Schedule Of Matching HTML 52K
Contributions) (Details)
129: R93 Stock-Based Compensation (Narrative) (Details) HTML 93K
130: R94 Stock-Based Compensation (Summary Of Nonvested HTML 103K
Shares) (Details)
131: R95 Stock-Based Compensation (Summary of Expense) HTML 83K
(Details)
132: R96 Income Taxes (Narrative) (Details) HTML 54K
133: R97 Income Taxes (Schedule Of Effective Income Tax HTML 71K
Rate Reconciliation) (Details)
134: R98 Income Taxes (Schedule Of Components Of Income Tax HTML 77K
Expense (Benefit)) (Details)
135: R99 Income Taxes (Schedule Of Deferred Tax Assets And HTML 77K
Liabilities Resulting From Temporary Differences)
(Details)
136: R100 Income Taxes (Schedule Of Net Operating Loss HTML 68K
Carryforwards And Tax Credit Carryforwards)
(Details)
137: R101 Related Party Transactions (Narrative) (Details) HTML 63K
138: R102 Related Party Transactions (Schedule of Related HTML 61K
Party Electric Power Supply Agreements) (Details)
139: R103 Related Party Transactions (Schedule of Affiliate HTML 61K
Receivables and Payables) (Details)
140: R104 Related Party Transactions (Schedule of Capital HTML 50K
Contributions) (Details)
141: R105 Related Party Transactions (Effects of HTML 99K
Related-party Transactions on the Statement of
Income (Details)
142: R106 Commitments And Contingencies (Environmental HTML 80K
Matters) (Details)
143: R107 Supplemental Information (Narrative) (Details) HTML 49K
144: R108 Supplemental Information (Cash and Cash HTML 67K
Equivalents) (Details)
145: R109 Supplemental Information (Allowance for Doubtful HTML 67K
Accounts) (Details)
146: R110 Supplemental Information (Inventories) (Details) HTML 59K
147: R111 Supplemental Information (Schedule of Asset HTML 67K
Retirement Obligations (Details)
148: R112 Supplemental Information (Schedule of Excise HTML 50K
Taxes) (Details)
149: R113 Supplemental Information (Allowance For Funds Used HTML 61K
During Construction) (Details)
150: R114 Supplemental Information (Earnings Per Share) HTML 57K
(Details)
151: R115 Supplemental Information (Supplemental Cash Flow HTML 72K
Information) (Details)
152: R116 Segment Information (Schedule Of Segment Reporting HTML 139K
Information By Segment) (Details)
153: R117 Segment Information (Disaggregation of Revenues) HTML 216K
(Details)
154: R118 Schedule I - Condensed Financial Information Of HTML 102K
Parent (Statement of Income) (Details)
155: R119 Schedule I - Condensed Financial Information Of HTML 175K
Parent (Balance Sheet) (Details)
156: R120 Schedule I - Condensed Financial Information Of HTML 102K
Parent (Statement of Cash Flows) (Details)
157: R121 Schedule I - Condensed Financial Information Of HTML 56K
Parent Other Income (Expense), Net (Details)
158: R122 Schedule II - Valuation And Qualifying Accounts HTML 63K
(Details)
160: XML IDEA XML File -- Filing Summary XML 287K
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1. I have reviewed this report on Form 10-K for the fiscal year ended December 31, 2023, of Ameren Illinois Company;
2. Based
on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant
and have:
a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c)Evaluated the effectiveness of the registrant’s
disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and
5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors
(or persons performing the equivalent functions):
a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.