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v3.23.2

Common Equity (Changes in Shareowners' Equity) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | $ 6,276 |
Beginning balance | $ 6,328 | $ 6,077 | 6,276 | $ 5,990
Net income attributable to common shareowners | 160 | 159 | 323 | 351
Net income |  |  | 323 | 351
Common stock dividends | (113) | (108) | (226) | (215)
At-the-market offering program and Shareowner Direct Plan issuances | 70 | 6 | 76 | 13
Equity-based compensation plans and other | 3 | 3 | 0 | (2)
Other comprehensive income, net of tax | 4 |  | 3 |
Contributions from noncontrolling interest |  | 29 | 0 | 29
Ending balance | 6,452 |  | 6,452 |
Ending balance | $ 6,452 | $ 6,166 | $ 6,452 | $ 6,166
Common stock dividends (in dollars per share) | $ 0.4525 | $ 0.4275 | $ 0.905 | $ 0.855
Common Stock [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | $ 3 | $ 3 | $ 3 | $ 3
At-the-market offering program and Shareowner Direct Plan issuances |  |  |  |
Ending balance | 3 | 3 | 3 | 3
Additional Paid-in Capital [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 2,780 | 2,750 | 2,777 | 2,749
At-the-market offering program and Shareowner Direct Plan issuances | 70 | 6 | 76 | 13
Equity-based compensation plans and other | 4 | 3 | 1 | (3)
Ending balance | 2,854 | 2,759 | 2,854 | 2,759
Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 3,559 | 3,336 | 3,509 | 3,250
Net income attributable to common shareowners | 160 | 159 | 323 | 351
Common stock dividends | (113) | (108) | (226) | (215)
Equity-based compensation plans and other |  |  |  | 1
Ending balance | 3,606 | 3,387 | 3,606 | 3,387
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | (1) | 0 | 0 | 0
Other comprehensive income, net of tax | 4 |  | 3 |
Ending balance | 3 | 0 | 3 | 0
Shares in Deferred Compensation Trust [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | (13) | (12) | (13) | (12)
Equity-based compensation plans and other | (1) |  | (1) |
Ending balance | (14) | (12) | (14) | (12)
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 | 0 | 29 | 0 | 29
IPL [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | 3,808 |
Beginning balance | 3,810 | 3,775 | 3,808 | 3,769
Net income | 89 | 87 | 161 | 173
Common stock dividends | (70) | (80) | (140) | (160)
Capital contributions from parent | 40 |  | 40 | 0
Ending balance | 3,869 |  | 3,869 |
Ending balance | 3,869 | 3,782 | 3,869 | 3,782
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 | 2,807 | 2,807 | 2,807
Capital contributions from parent | 40 |  | 40 |
Ending balance | 2,847 | 2,807 | 2,847 | 2,807
IPL [Member] | Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 970 | 935 | 968 | 929
Net income | 89 | 87 | 161 | 173
Common stock dividends | (70) | (80) | (140) | (160)
Ending balance | 989 | 942 | 989 | 942
WPL [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | 3,491 |
Beginning balance | 3,713 | 3,051 | 3,491 | 2,823
Net income | 72 | 63 | 160 | 156
Common stock dividends | (46) | (44) | (92) | (89)
Equity-based compensation plans and other |  | (1) |  | (1)
Capital contributions from parent |  | 85 | 180 | 265
Contributions from noncontrolling interest |  | 29 | 0 | 29
Ending balance | 3,739 |  | 3,739 |
Ending balance | 3,739 | 3,183 | 3,739 | 3,183
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 | 2,413 | 1,884 | 2,233 | 1,704
Equity-based compensation plans and other |  | (1) |  | (1)
Capital contributions from parent |  | 85 | 180 | 265
Ending balance | 2,413 | 1,968 | 2,413 | 1,968
WPL [Member] | Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 1,234 | 1,101 | 1,192 | 1,053
Net income | 72 | 63 | 160 | 156
Common stock dividends | (46) | (44) | (92) | (89)
Ending balance | 1,260 | 1,120 | 1,260 | 1,120
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 | $ 0 | $ 29 | $ 0 | $ 29

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