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v3.22.2

Common Equity (Changes in Shareowners' Equity) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | $ 5,990 |
Beginning balance | $ 6,077 | $ 5,966 | 5,990 | $ 5,888
Net income attributable to common shareowners | 159 | 144 | 351 | 315
Net income | 159 | 146 | 351 | 320
Common stock dividends | (108) | (101) | (215) | (203)
Shareowner Direct Plan issuances | 6 | 7 | 13 | 15
Equity-based compensation plans and other | 3 | 3 | (2) | 4
Contributions from noncontrolling interest | 29 |  | 29 |
Ending balance | 6,137 |  | 6,137 |
Ending balance | $ 6,166 | $ 6,019 | $ 6,166 | $ 6,019
Common stock dividends (in dollars per share) | $ 0.4275 | $ 0.4025 | $ 0.855 | $ 0.805
Common Stock [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | $ 3 | $ 3 | $ 3 | $ 2
Shareowner Direct Plan issuances |  |  |  | 1
Ending balance | 3 | 3 | 3 | 3
Additional Paid-in Capital [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 2,750 | 2,712 | 2,749 | 2,704
Shareowner Direct Plan issuances | 6 | 7 | 13 | 14
Equity-based compensation plans and other | 3 | 3 | (3) | 4
Ending balance | 2,759 | 2,722 | 2,759 | 2,722
Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 3,336 | 3,063 | 3,250 | 2,994
Net income attributable to common shareowners | 159 | 144 | 351 | 315
Common stock dividends | (108) | (101) | (215) | (203)
Equity-based compensation plans and other |  |  | 1 |
Ending balance | 3,387 | 3,106 | 3,387 | 3,106
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 0 | (1) | 0 | (1)
Ending balance | 0 | (1) | 0 | (1)
Shares in Deferred Compensation Trust [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | (12) | (11) | (12) | (11)
Ending balance | (12) | (11) | (12) | (11)
Noncontrolling Interest [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 0 |  | 0 |
Contributions from noncontrolling interest | 29 |  | 29 |
Ending balance | 29 |  | 29 |
Cumulative Preferred Stock [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  | 200 |  | 200
Ending balance |  | 200 |  | 200
IPL [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | 3,769 |
Beginning balance | 3,775 | 3,942 | 3,769 | 3,964
Net income attributable to common shareowners | 87 | 86 | 173 | 165
Net income | 87 | 88 | 173 | 170
Common stock dividends | (80) | (99) | (160) | (200)
Capital contributions from parent |  | 50 | 0 | 50
Ending balance | 3,782 |  | 3,782 |
Ending balance | 3,782 | 3,979 | 3,782 | 3,979
IPL [Member] | Common Stock [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 33 | 33 | 33 | 33
Ending balance | 33 | 33 | 33 | 33
IPL [Member] | Additional Paid-in Capital [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 2,807 | 2,752 | 2,807 | 2,752
Capital contributions from parent |  | 50 |  | 50
Ending balance | 2,807 | 2,802 | 2,807 | 2,802
IPL [Member] | Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 935 | 957 | 929 | 979
Net income attributable to common shareowners | 87 | 86 | 173 | 165
Common stock dividends | (80) | (99) | (160) | (200)
Ending balance | 942 | 944 | 942 | 944
IPL [Member] | Cumulative Preferred Stock [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 0 | 200 | 0 | 200
Ending balance | 0 | 200 | 0 | 200
WPL [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | 2,823 |
Beginning balance | 3,051 | 2,645 | 2,823 | 2,478
Net income | 63 | 38 | 156 | 122
Common stock dividends | (44) | (43) | (89) | (85)
Equity-based compensation plans and other | (1) |  | (1) |
Capital contributions from parent | 85 | 85 | 265 | 210
Contributions from noncontrolling interest | 29 |  | 29 |
Ending balance | 3,154 |  | 3,154 |
Ending balance | 3,183 | 2,725 | 3,183 | 2,725
WPL [Member] | Common Stock [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 66 | 66 | 66 | 66
Ending balance | 66 | 66 | 66 | 66
WPL [Member] | Additional Paid-in Capital [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 1,884 | 1,584 | 1,704 | 1,459
Equity-based compensation plans and other | (1) |  | (1) |
Capital contributions from parent | 85 | 85 | 265 | 210
Ending balance | 1,968 | 1,669 | 1,968 | 1,669
WPL [Member] | Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 1,101 | 995 | 1,053 | 953
Net income | 63 | 38 | 156 | 122
Common stock dividends | (44) | (43) | (89) | (85)
Ending balance | 1,120 | 990 | 1,120 | 990
WPL [Member] | Noncontrolling Interest [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 0 | 0 | 0 | 0
Contributions from noncontrolling interest | 29 |  | 29 |
Ending balance | $ 29 | $ 0 | $ 29 | $ 0

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