Annual Report — Form 10-K — Sect. 13 / 15(d) – SEA’34
Filing Table of Contents
Document/Exhibit Description Pages Size
1: 10-K Annual Report HTML 4.88M
2: EX-4.26 Description of Common Stock of Alliant Energy HTML 48K
3: EX-4.27 Description of 5.100% Series D Cumulative HTML 59K
Perpetual Preferred Stock of Ipl
4: EX-10.16 Summary of Compensation and Benefits for HTML 44K
Non-Employee Directors
5: EX-21.1 Subsidiaries of Alliant Energy HTML 41K
6: EX-23.1 Consent of Independent Registered Public HTML 41K
Accounting Firm for Alliant Energy
7: EX-23.2 Consent of Independent Registered Public HTML 41K
Accounting Firm for Ipl
8: EX-23.3 Consent of Independent Registered Public HTML 41K
Accounting Firm for Wpl
9: EX-31.1 Certification of the CEO for Alliant Energy HTML 47K
10: EX-31.2 Certification of the CFO for Alliant Energy HTML 47K
11: EX-31.3 Certification of the CEO for Ipl HTML 47K
12: EX-31.4 Certification of the CFO for Ipl HTML 47K
13: EX-31.5 Certification of the CEO for Wpl HTML 47K
14: EX-31.6 Certification of the CFO for Wpl HTML 47K
15: EX-32.1 Written Statement of CEO and CFO Pursuant to 18 HTML 42K
U.S.C.1350 for Alliant Energy
16: EX-32.2 Written Statement of CEO and CFO Pursuant to 18 HTML 42K
U.S.C.1350 for Ipl
17: EX-32.3 Written Statement of CEO and CFO Pursuant to 18 HTML 42K
U.S.C.1350 for Wpl
91: R1 Document And Entity Information HTML 124K
139: R2 Consolidated Statements Of Income HTML 172K
123: R3 Consolidated Balance Sheets HTML 213K
36: R4 Consolidated Balance Sheets (Parenthetical) HTML 55K
90: R5 Consolidated Statements Of Cash Flows HTML 165K
136: R6 Consolidated Statements of Common Equity HTML 93K
120: R7 Consolidated Statements of Common Equity HTML 43K
(Parenthetical)
39: R8 Summary Of Significant Accounting Policies HTML 284K
87: R9 Regulatory Matters HTML 404K
132: R10 Property, Plant and Equipment HTML 394K
114: R11 Jointly-Owned Electric Utility Plant HTML 151K
25: R12 Receivables HTML 196K
74: R13 Investments HTML 69K
131: R14 Common Equity HTML 125K
113: R15 Preferred Stock HTML 63K
23: R16 Debt HTML 685K
72: R17 Leases HTML 487K
134: R18 Revenues HTML 444K
111: R19 Income Taxes HTML 705K
55: R20 Benefit Plans HTML 3.11M
68: R21 Asset Retirement Obligations HTML 147K
155: R22 Derivative Instruments HTML 201K
101: R23 Fair Value Measurements HTML 752K
54: R24 Commitments And Contingencies HTML 397K
67: R25 Segments Of Business HTML 872K
154: R26 Related Parties HTML 132K
100: R27 Selected Consolidated Quarterly Financial Data HTML 287K
(Unaudited)
52: R28 Condensed Parent Company Financial Statements HTML 149K
69: R29 Valuation and Qualifying Accounts And Reserves HTML 182K
79: R30 Summary Of Significant Accounting Policies HTML 340K
(Policy)
28: R31 Summary Of Significant Accounting Policies HTML 133K
(Tables)
107: R32 Regulatory Matters (Tables) HTML 349K
126: R33 Property, Plant and Equipment (Tables) HTML 391K
81: R34 Jointly-Owned Electric Utility Plant (Tables) HTML 153K
29: R35 Receivables (Tables) HTML 197K
109: R36 Investments (Tables) HTML 65K
128: R37 Common Equity (Tables) HTML 59K
77: R38 Preferred Stock (Tables) HTML 65K
31: R39 Debt (Tables) HTML 688K
57: R40 Leases (Tables) HTML 436K
42: R41 Revenues (Tables) HTML 433K
98: R42 Income Taxes (Tables) HTML 693K
152: R43 Benefit Plans (Tables) HTML 2.86M
58: R44 Asset Retirement Obligations (Tables) HTML 145K
43: R45 Derivative Instruments (Tables) HTML 175K
99: R46 Fair Value Measurements (Tables) HTML 741K
153: R47 Commitments And Contingencies (Tables) HTML 345K
56: R48 Segments Of Business (Tables) HTML 318K
44: R49 Related Parties (Tables) HTML 127K
35: R50 Selected Consolidated Quarterly Financial Data HTML 124K
(Unaudited) (Tables)
83: R51 Condensed Parent Company Financial Statements HTML 150K
(Tables)
145: R52 Summary Of Significant Accounting Policies HTML 63K
(Narrative) (Details)
125: R53 Summary Of Significant Accounting Policies HTML 62K
(Schedule Of Average Rates Of Depreciation)
(Details)
34: R54 Summary Of Significant Accounting Policies HTML 57K
(Schedule Of Allowance For Funds Used During
Construction Recovery Rate) (Details)
82: R55 Regulatory Matters (Narrative) (Details) HTML 87K
144: R56 Regulatory Matters (Regulatory Assets) (Details) HTML 77K
124: R57 Regulatory Matters (Assets Retired Early (Details) HTML 65K
33: R58 Regulatory Matters (Regulatory Liabilities) HTML 75K
(Details)
84: R59 Property, Plant and Equipment (Narrative) HTML 61K
(Details)
148: R60 Property, Plant and Equipment (Property, Plant and HTML 104K
Equipment) (Details)
96: R61 Property, Plant and Equipment (Equity and Debt HTML 58K
AFUDC) (Details)
47: R62 Jointly-Owned Electric Utility Plant (Details) HTML 76K
62: R63 Receivables (Narrative) (Details) HTML 49K
147: R64 Receivables (Details of Accounts Receivable) HTML 64K
(Details)
95: R65 Receivables (Maximum And Average Outstanding Cash HTML 48K
Proceeds) (Details)
46: R66 Receivables (Receivables Sold Under The Agreement) HTML 62K
(Details)
61: R67 Receivables (Additional Attributes Of Receivables HTML 46K
Sold Under The Agreement) (Details)
150: R68 Investments (Narrative) (Details) HTML 46K
92: R69 Investments (Unconsolidated Equity Investments) HTML 67K
(Details)
117: R70 Common Equity (Narrative) (Details) HTML 73K
141: R71 Preferred Stock (Narrative) (Details) HTML 57K
86: R72 Common Equity (Common Share Activity) (Details) HTML 60K
38: R73 Preferred Stock (Carrying Value Of Cumulative HTML 56K
Preferred Stock) (Details)
118: R74 Debt (Narrative) (Details) HTML 57K
142: R75 Debt (Credit Facilities) (Details) HTML 54K
88: R76 Debt (Other Short-Term Borrowings) (Details) HTML 52K
40: R77 Debt (Schedule Of Debt-To-Capital Ratios) HTML 47K
(Details)
122: R78 Debt (Long-term Debt) (Details) HTML 193K
138: R79 Debt (Schedule Of Debt Maturities) (Details) HTML 65K
116: R80 Leases (Narrative) (Details) HTML 45K
140: R81 Leases (Operating Leases) (Details) HTML 64K
85: R82 Leases (Finance Lease) (Details) HTML 65K
37: R83 Leases (Expected Maturities of Operating and HTML 91K
Finance Lease Liabilities (Details)
119: R84 Leases (Future Minimum Operating and Capital Lease HTML 92K
Payments) (Details)
143: R85 Disaggregation of Revenues (Details) HTML 109K
89: R86 Income Taxes (Narrative) (Details) HTML 66K
41: R87 Income Taxes (Schedule Of Components Of Income HTML 79K
Tax) (Details)
121: R88 Income Taxes (Schedule Of Effective Income Tax HTML 84K
Rates) (Details)
137: R89 Income Taxes (Schedule Of Deferred Tax Assets And HTML 88K
Liabilities) (Details)
149: R90 Income Taxes (Summary Of Tax Credit Carryforwards) HTML 51K
(Details)
97: R91 Income Taxes (Schedule Of Uncertain Tax Positions) HTML 44K
(Details)
48: R92 Benefit Plans (Narrative) (Details) HTML 102K
63: R93 Benefit Plans (Assumptions Used To Measure Benefit HTML 74K
Plans) (Details)
146: R94 Benefit Plans (Defined Benefit Pension And Other HTML 88K
Postretirement Benefits Plans) (Details)
94: R95 Benefit Plans (Funded Status of Benefits Plans) HTML 122K
(Details)
45: R96 Benefit Plans (Amounts Recognized On The HTML 89K
Consolidated Balance Sheets) (Details)
60: R97 Benefit Plans (Accumulated Benefit Obligations) HTML 77K
(Details)
151: R98 Benefit Plans (Regulatory Assets) (Details) HTML 46K
93: R99 Benefit Plans (Estimated Future Funding) (Details) HTML 55K
70: R100 Benefit Plans (Expected Benefit Payments) HTML 80K
(Details)
26: R101 Benefit Plans (Allocation Of Plan Assets) HTML 86K
(Details)
110: R102 Benefit Plans (Fair Value Of Plan Assets By Asset HTML 231K
Category And Fair Value Hierarchy Level) (Details)
133: R103 Benefit Plans (Employees Participate In Defined HTML 45K
Contribution Retirement Plans) (Details)
71: R104 Benefit Plans (Recognized Compensation Expense And HTML 49K
Income Tax Benefits) (Details)
27: R105 Benefit Plans (Summary Of Performance Shares and HTML 71K
Performance Units Activity) (Details)
112: R106 Benefit Plans (Fair Values Of Nonvested HTML 59K
Performance Shares And Performance Units)
(Details)
135: R107 Benefit Plans (Summary Of Performance Shares and HTML 74K
Performance Units Vested Awards) (Details)
73: R108 Benefit Plans (Summary of Restricted Stock Units) HTML 67K
(Details)
24: R109 Benefit Plans (Summary of Performance Restricted HTML 66K
Stock Units) (Details)
50: R110 Benefit Plans (Carrying Value And Fair Market HTML 45K
Value Of The Deferred Compensation Obligation for
Company Stock Account) (Details)
66: R111 Asset Retirement Obligations (Reconciliation Of HTML 63K
Changes In Asset Retirement Obligations) (Details)
157: R112 Derivative Instruments (Notional Amounts Of HTML 65K
Derivative Instruments) (Details)
104: R113 Derivative Instruments (Fair Value Of Financial HTML 58K
Instruments) (Details)
49: R114 Fair Value Measurements (Recurring Fair Value HTML 109K
Measurements) (Details)
65: R115 Fair Value Measurements (Fair Value Measurements HTML 84K
Using Significant Unobservable Inputs) (Details)
156: R116 Fair Value Measurements (Fair Value Of Net HTML 59K
Derivative Assets (Liabilities)) (Details)
103: R117 Commitments And Contingencies (Narrative) HTML 81K
(Details)
51: R118 Commitments And Contingencies (Other Purchase HTML 120K
Commitments) (Details)
64: R119 Commitments And Contingencies (Schedule Of HTML 51K
Environmental Liabilities) (Details)
130: R120 Segments Of Business (Narrative) (Details) HTML 47K
106: R121 Segments Of Business (Schedule Of Segment Of HTML 170K
Business) (Details)
32: R122 Related Parties (Narrative) (Details) HTML 46K
78: R123 Related Parties (Service Agreements) (Details) HTML 58K
129: R124 Related Parties (Net Intercompany Payables) HTML 49K
(Details)
105: R125 Related Parties (Related Amounts Billed Between HTML 51K
Parties) (Details)
30: R126 Selected Consolidated Quarterly Financial Data HTML 69K
(Unaudited) (Details)
76: R127 Condensed Parent Company Financial Statements HTML 83K
(Condensed Statements Of Income) (Details)
127: R128 Condensed Parent Company Financial Statements HTML 110K
(Condensed Balance Sheets) (Details)
108: R129 Condensed Parent Company Financial Statements HTML 92K
(Condensed Statements of Cash Flows) (Details)
102: R130 Valuation And Qualifying Accounts and Reserves HTML 62K
(Details)
80: XML IDEA XML File -- Filing Summary XML 296K
59: XML XBRL Instance -- lnt1231201910-k_htm XML 24.98M
75: EXCEL IDEA Workbook of Financial Reports XLSX 220K
19: EX-101.CAL XBRL Calculations -- lnt-20191231_cal XML 369K
20: EX-101.DEF XBRL Definitions -- lnt-20191231_def XML 2.55M
21: EX-101.LAB XBRL Labels -- lnt-20191231_lab XML 2.95M
22: EX-101.PRE XBRL Presentations -- lnt-20191231_pre XML 2.65M
18: EX-101.SCH XBRL Schema -- lnt-20191231 XSD 351K
115: JSON XBRL Instance as JSON Data -- MetaLinks 649± 1.00M
53: ZIP XBRL Zipped Folder -- 0000352541-20-000021-xbrl Zip 1.15M
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