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v3.22.2.2

Common Equity (Changes in Shareowners' Equity) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance |  |  | $ 5,990 |
Beginning balance | $ 6,166 | $ 6,019 | 5,990 | $ 5,888
Net income attributable to common shareowners | 227 | 256 | 579 | 571
Net income | 227 | 259 | 579 | 579
Common stock dividends | (106) | (101) | (322) | (304)
Shareowner Direct Plan issuances | 6 | 6 | 19 | 22
Equity-based compensation plans and other | 1 | 5 | (1) | 8
Contributions from noncontrolling interest |  |  | 29 |
Distributions to noncontrolling interest | (29) |  | (29) |
Ending balance | 6,265 |  | 6,265 |
Ending balance | $ 6,265 | $ 6,185 | $ 6,265 | $ 6,185
Common stock dividends (in dollars per share) | $ 0.4275 | $ 0.4025 | $ 1.2825 | $ 1.2075
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 | 2,759 | 2,722 | 2,749 | 2,704
Shareowner Direct Plan issuances | 6 | 6 | 19 | 21
Equity-based compensation plans and other | 2 | 5 | (1) | 8
Ending balance | 2,767 | 2,733 | 2,767 | 2,733
Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 3,387 | 3,106 | 3,250 | 2,994
Net income attributable to common shareowners | 227 | 256 | 579 | 571
Common stock dividends | (106) | (101) | (322) | (304)
Equity-based compensation plans and other |  |  | 1 |
Ending balance | 3,508 | 3,261 | 3,508 | 3,261
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)
Equity-based compensation plans and other | (1) |  | (1) |
Ending balance | (13) | (11) | (13) | (11)
Noncontrolling Interest [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 29 |  | 0 |
Contributions from noncontrolling interest |  |  | 29 |
Distributions to noncontrolling interest | (29) |  | (29) |
Ending balance | 0 |  | 0 |
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 | 3,782 | 3,979 | 3,769 | 3,964
Net income attributable to common shareowners | 154 | 157 | 327 | 322
Net income | 154 | 160 | 327 | 330
Common stock dividends | (80) | (101) | (240) | (301)
Capital contributions from parent |  |  | 0 | 50
Ending balance | 3,856 |  | 3,856 |
Ending balance | 3,856 | 4,035 | 3,856 | 4,035
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 | 2,802 | 2,807 | 2,752
Capital contributions from parent |  |  |  | 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 | 942 | 944 | 929 | 979
Net income attributable to common shareowners | 154 | 157 | 327 | 322
Common stock dividends | (80) | (101) | (240) | (301)
Ending balance | 1,016 | 1,000 | 1,016 | 1,000
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 | 3,183 | 2,725 | 2,823 | 2,478
Net income | 91 | 93 | 247 | 215
Common stock dividends | (44) | (41) | (133) | (126)
Equity-based compensation plans and other |  |  | (1) |
Capital contributions from parent | 155 | 35 | 420 | 245
Contributions from noncontrolling interest |  |  | 29 |
Distributions to noncontrolling interest | (29) |  | (29) |
Ending balance | 3,356 |  | 3,356 |
Ending balance | 3,356 | 2,812 | 3,356 | 2,812
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 | 1,968 | 1,669 | 1,704 | 1,459
Equity-based compensation plans and other |  |  | (1) |
Capital contributions from parent | 155 | 35 | 420 | 245
Ending balance | 2,123 | 1,704 | 2,123 | 1,704
WPL [Member] | Retained Earnings [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 1,120 | 990 | 1,053 | 953
Net income | 91 | 93 | 247 | 215
Common stock dividends | (44) | (41) | (133) | (126)
Ending balance | 1,167 | 1,042 | 1,167 | 1,042
WPL [Member] | Noncontrolling Interest [Member] |  |  |  |
Changes in Shareowners' Equity Roll Forward [Line Items] |  |  |  |
Beginning balance | 29 | 0 | 0 | 0
Contributions from noncontrolling interest |  |  | 29 |
Distributions to noncontrolling interest | (29) |  | (29) |
Ending balance | $ 0 | $ 0 | $ 0 | $ 0

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