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Common Equity | 6 Months Ended
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Jun. 30, 2022
Common Equity [Line Items] |
Common Equity | COMMON EQUITY Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:
Shares outstanding, January 1, 2022 | 250,474,529 |
Shareowner Direct Plan | 228,935 |
Equity-based compensation plans | 222,768 |
Shares outstanding, June 30, 2022 | 250,926,232 |
Noncontrolling Interest - In the second quarter of 2022, WPL and the tax equity partner contributed to the joint venture associated with certain WPL solar generation projects. Earnings, tax attributes and cash flows from the joint venture will be allocated to both the WPL subsidiary and the tax equity partner in varying percentages by category and over the life of the partnership. The tax equity partner's contributions, net of these allocations, is represented as a noncontrolling interest within total equity on Alliant Energy’s and WPL’s balance sheets. Refer to Note 1(b) for additional information. Changes in Shareowners’ Equity - A summary of changes in shareowners’ equity was as follows (in millions):
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  |  |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  |  |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | Interest |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $3 |  | $2,750 |  | $3,336 |  | $— |  | ($12) |  | $— |  | $6,077
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 159 |  |  |  |  |  |  |  | 159
Common stock dividends ($0.4275 per share) |  |  |  |  | (108) |  |  |  |  |  |  |  | (108)
Shareowner Direct Plan issuances |  |  | 6 |  |  |  |  |  |  |  |  |  | 6
Equity-based compensation plans and other |  |  | 3 |  |  |  |  |  |  |  |  |  | 3
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  |  |  | 29 |  | 29
Ending balance, June 30, 2022 | $3 |  | $2,759 |  | $3,387 |  | $— |  | ($12) |  | $29 |  | $6,166
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  | Cumulative |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  | Preferred |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Stock |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | of IPL |  | Equity
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $3 |  | $2,712 |  | $3,063 |  | ($1) |  | ($11) |  | $200 |  | $5,966
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 144 |  |  |  |  |  |  |  | 144
Common stock dividends ($0.4025 per share) |  |  |  |  | (101) |  |  |  |  |  |  |  | (101)
Shareowner Direct Plan issuances |  |  | 7 |  |  |  |  |  |  |  |  |  | 7
Equity-based compensation plans and other |  |  | 3 |  |  |  |  |  |  |  |  |  | 3
Ending balance, June 30, 2021 | $3 |  | $2,722 |  | $3,106 |  | ($1) |  | ($11) |  | $200 |  | $6,019
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  |  |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  |  |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | Interest |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $3 |  | $2,749 |  | $3,250 |  | $— |  | ($12) |  | $— |  | $5,990
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 351 |  |  |  |  |  |  |  | 351
Common stock dividends ($0.855 per share) |  |  |  |  | (215) |  |  |  |  |  |  |  | (215)
Shareowner Direct Plan issuances |  |  | 13 |  |  |  |  |  |  |  |  |  | 13
Equity-based compensation plans and other |  |  | (3) |  | 1 |  |  |  |  |  |  |  | (2)
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  |  |  | 29 |  | 29
Ending balance, June 30, 2022 | $3 |  | $2,759 |  | $3,387 |  | $— |  | ($12) |  | $29 |  | $6,166
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  | Cumulative |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  | Preferred |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Stock |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | of IPL |  | Equity
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $2 |  | $2,704 |  | $2,994 |  | ($1) |  | ($11) |  | $200 |  | $5,888
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 315 |  |  |  |  |  |  |  | 315
Common stock dividends ($0.805 per share) |  |  |  |  | (203) |  |  |  |  |  |  |  | (203)
Shareowner Direct Plan issuances | 1 |  | 14 |  |  |  |  |  |  |  |  |  | 15
Equity-based compensation plans and other |  |  | 4 |  |  |  |  |  |  |  |  |  | 4
Ending balance, June 30, 2021 | $3 |  | $2,722 |  | $3,106 |  | ($1) |  | ($11) |  | $200 |  | $6,019
IPL | Total IPL Common Equity |  |  |  |
|  |  | Additional |  |  |  | Cumulative |  |
| Common |  | Paid-In |  | Retained |  | Preferred |  | Total
| Stock |  | Capital |  | Earnings |  | Stock |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $33 |  | $2,807 |  | $935 |  | $— |  | $3,775
Net income available for common stock |  |  |  |  | 87 |  |  |  | 87
Common stock dividends |  |  |  |  | (80) |  |  |  | (80)
Ending balance, June 30, 2022 | $33 |  | $2,807 |  | $942 |  | $— |  | $3,782
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $33 |  | $2,752 |  | $957 |  | $200 |  | $3,942
Net income available for common stock |  |  |  |  | 86 |  |  |  | 86
Common stock dividends |  |  |  |  | (99) |  |  |  | (99)
Capital contributions from parent |  |  | 50 |  |  |  |  |  | 50
Ending balance, June 30, 2021 | $33 |  | $2,802 |  | $944 |  | $200 |  | $3,979
IPL | Total IPL Common Equity |  |  |  |
|  |  | Additional |  |  |  | Cumulative |  |
| Common |  | Paid-In |  | Retained |  | Preferred |  | Total
| Stock |  | Capital |  | Earnings |  | Stock |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $33 |  | $2,807 |  | $929 |  | $— |  | $3,769
Net income available for common stock |  |  |  |  | 173 |  |  |  | 173
Common stock dividends |  |  |  |  | (160) |  |  |  | (160)
Ending balance, June 30, 2022 | $33 |  | $2,807 |  | $942 |  | $— |  | $3,782
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $33 |  | $2,752 |  | $979 |  | $200 |  | $3,964
Net income available for common stock |  |  |  |  | 165 |  |  |  | 165
Common stock dividends |  |  |  |  | (200) |  |  |  | (200)
Capital contributions from parent |  |  | 50 |  |  |  |  |  | 50
Ending balance, June 30, 2021 | $33 |  | $2,802 |  | $944 |  | $200 |  | $3,979
WPL | Total WPL Common Equity |  |  |  |
|  |  | Additional |  |  |  |  |  |
| Common |  | Paid-In |  | Retained |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Interest |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $66 |  | $1,884 |  | $1,101 |  | $— |  | $3,051
Net income |  |  |  |  | 63 |  |  |  | 63
Common stock dividends |  |  |  |  | (44) |  |  |  | (44)
Capital contributions from parent |  |  | 85 |  |  |  |  |  | 85
Contributions from noncontrolling interest |  |  |  |  |  |  | 29 |  | 29
Other |  |  | (1) |  |  |  |  |  | (1)
Ending balance, June 30, 2022 | $66 |  | $1,968 |  | $1,120 |  | $29 |  | $3,183
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $66 |  | $1,584 |  | $995 |  | $— |  | $2,645
Net income |  |  |  |  | 38 |  |  |  | 38
Common stock dividends |  |  |  |  | (43) |  |  |  | (43)
Capital contributions from parent |  |  | 85 |  |  |  |  |  | 85
Ending balance, June 30, 2021 | $66 |  | $1,669 |  | $990 |  | $— |  | $2,725
WPL | Total WPL Common Equity |  |  |  |
|  |  | Additional |  |  |  |  |  |
| Common |  | Paid-In |  | Retained |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Interest |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $66 |  | $1,704 |  | $1,053 |  | $— |  | $2,823
Net income |  |  |  |  | 156 |  |  |  | 156
Common stock dividends |  |  |  |  | (89) |  |  |  | (89)
Capital contributions from parent |  |  | 265 |  |  |  |  |  | 265
Contributions from noncontrolling interest |  |  |  |  |  |  | 29 |  | 29
Other |  |  | (1) |  |  |  |  |  | (1)
Ending balance, June 30, 2022 | $66 |  | $1,968 |  | $1,120 |  | $29 |  | $3,183
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $66 |  | $1,459 |  | $953 |  | $— |  | $2,478
Net income |  |  |  |  | 122 |  |  |  | 122
Common stock dividends |  |  |  |  | (85) |  |  |  | (85)
Capital contributions from parent |  |  | 210 |  |  |  |  |  | 210
Ending balance, June 30, 2021 | $66 |  | $1,669 |  | $990 |  | $— |  | $2,725
IPL [Member] |
Common Equity [Line Items] |
Common Equity | COMMON EQUITY Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:
Shares outstanding, January 1, 2022 | 250,474,529 |
Shareowner Direct Plan | 228,935 |
Equity-based compensation plans | 222,768 |
Shares outstanding, June 30, 2022 | 250,926,232 |
Noncontrolling Interest - In the second quarter of 2022, WPL and the tax equity partner contributed to the joint venture associated with certain WPL solar generation projects. Earnings, tax attributes and cash flows from the joint venture will be allocated to both the WPL subsidiary and the tax equity partner in varying percentages by category and over the life of the partnership. The tax equity partner's contributions, net of these allocations, is represented as a noncontrolling interest within total equity on Alliant Energy’s and WPL’s balance sheets. Refer to Note 1(b) for additional information. Changes in Shareowners’ Equity - A summary of changes in shareowners’ equity was as follows (in millions):
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  |  |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  |  |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | Interest |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $3 |  | $2,750 |  | $3,336 |  | $— |  | ($12) |  | $— |  | $6,077
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 159 |  |  |  |  |  |  |  | 159
Common stock dividends ($0.4275 per share) |  |  |  |  | (108) |  |  |  |  |  |  |  | (108)
Shareowner Direct Plan issuances |  |  | 6 |  |  |  |  |  |  |  |  |  | 6
Equity-based compensation plans and other |  |  | 3 |  |  |  |  |  |  |  |  |  | 3
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  |  |  | 29 |  | 29
Ending balance, June 30, 2022 | $3 |  | $2,759 |  | $3,387 |  | $— |  | ($12) |  | $29 |  | $6,166
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  | Cumulative |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  | Preferred |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Stock |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | of IPL |  | Equity
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $3 |  | $2,712 |  | $3,063 |  | ($1) |  | ($11) |  | $200 |  | $5,966
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 144 |  |  |  |  |  |  |  | 144
Common stock dividends ($0.4025 per share) |  |  |  |  | (101) |  |  |  |  |  |  |  | (101)
Shareowner Direct Plan issuances |  |  | 7 |  |  |  |  |  |  |  |  |  | 7
Equity-based compensation plans and other |  |  | 3 |  |  |  |  |  |  |  |  |  | 3
Ending balance, June 30, 2021 | $3 |  | $2,722 |  | $3,106 |  | ($1) |  | ($11) |  | $200 |  | $6,019
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  |  |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  |  |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | Interest |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $3 |  | $2,749 |  | $3,250 |  | $— |  | ($12) |  | $— |  | $5,990
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 351 |  |  |  |  |  |  |  | 351
Common stock dividends ($0.855 per share) |  |  |  |  | (215) |  |  |  |  |  |  |  | (215)
Shareowner Direct Plan issuances |  |  | 13 |  |  |  |  |  |  |  |  |  | 13
Equity-based compensation plans and other |  |  | (3) |  | 1 |  |  |  |  |  |  |  | (2)
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  |  |  | 29 |  | 29
Ending balance, June 30, 2022 | $3 |  | $2,759 |  | $3,387 |  | $— |  | ($12) |  | $29 |  | $6,166
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  | Cumulative |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  | Preferred |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Stock |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | of IPL |  | Equity
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $2 |  | $2,704 |  | $2,994 |  | ($1) |  | ($11) |  | $200 |  | $5,888
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 315 |  |  |  |  |  |  |  | 315
Common stock dividends ($0.805 per share) |  |  |  |  | (203) |  |  |  |  |  |  |  | (203)
Shareowner Direct Plan issuances | 1 |  | 14 |  |  |  |  |  |  |  |  |  | 15
Equity-based compensation plans and other |  |  | 4 |  |  |  |  |  |  |  |  |  | 4
Ending balance, June 30, 2021 | $3 |  | $2,722 |  | $3,106 |  | ($1) |  | ($11) |  | $200 |  | $6,019
IPL | Total IPL Common Equity |  |  |  |
|  |  | Additional |  |  |  | Cumulative |  |
| Common |  | Paid-In |  | Retained |  | Preferred |  | Total
| Stock |  | Capital |  | Earnings |  | Stock |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $33 |  | $2,807 |  | $935 |  | $— |  | $3,775
Net income available for common stock |  |  |  |  | 87 |  |  |  | 87
Common stock dividends |  |  |  |  | (80) |  |  |  | (80)
Ending balance, June 30, 2022 | $33 |  | $2,807 |  | $942 |  | $— |  | $3,782
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $33 |  | $2,752 |  | $957 |  | $200 |  | $3,942
Net income available for common stock |  |  |  |  | 86 |  |  |  | 86
Common stock dividends |  |  |  |  | (99) |  |  |  | (99)
Capital contributions from parent |  |  | 50 |  |  |  |  |  | 50
Ending balance, June 30, 2021 | $33 |  | $2,802 |  | $944 |  | $200 |  | $3,979
IPL | Total IPL Common Equity |  |  |  |
|  |  | Additional |  |  |  | Cumulative |  |
| Common |  | Paid-In |  | Retained |  | Preferred |  | Total
| Stock |  | Capital |  | Earnings |  | Stock |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $33 |  | $2,807 |  | $929 |  | $— |  | $3,769
Net income available for common stock |  |  |  |  | 173 |  |  |  | 173
Common stock dividends |  |  |  |  | (160) |  |  |  | (160)
Ending balance, June 30, 2022 | $33 |  | $2,807 |  | $942 |  | $— |  | $3,782
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $33 |  | $2,752 |  | $979 |  | $200 |  | $3,964
Net income available for common stock |  |  |  |  | 165 |  |  |  | 165
Common stock dividends |  |  |  |  | (200) |  |  |  | (200)
Capital contributions from parent |  |  | 50 |  |  |  |  |  | 50
Ending balance, June 30, 2021 | $33 |  | $2,802 |  | $944 |  | $200 |  | $3,979
WPL | Total WPL Common Equity |  |  |  |
|  |  | Additional |  |  |  |  |  |
| Common |  | Paid-In |  | Retained |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Interest |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $66 |  | $1,884 |  | $1,101 |  | $— |  | $3,051
Net income |  |  |  |  | 63 |  |  |  | 63
Common stock dividends |  |  |  |  | (44) |  |  |  | (44)
Capital contributions from parent |  |  | 85 |  |  |  |  |  | 85
Contributions from noncontrolling interest |  |  |  |  |  |  | 29 |  | 29
Other |  |  | (1) |  |  |  |  |  | (1)
Ending balance, June 30, 2022 | $66 |  | $1,968 |  | $1,120 |  | $29 |  | $3,183
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $66 |  | $1,584 |  | $995 |  | $— |  | $2,645
Net income |  |  |  |  | 38 |  |  |  | 38
Common stock dividends |  |  |  |  | (43) |  |  |  | (43)
Capital contributions from parent |  |  | 85 |  |  |  |  |  | 85
Ending balance, June 30, 2021 | $66 |  | $1,669 |  | $990 |  | $— |  | $2,725
WPL | Total WPL Common Equity |  |  |  |
|  |  | Additional |  |  |  |  |  |
| Common |  | Paid-In |  | Retained |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Interest |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $66 |  | $1,704 |  | $1,053 |  | $— |  | $2,823
Net income |  |  |  |  | 156 |  |  |  | 156
Common stock dividends |  |  |  |  | (89) |  |  |  | (89)
Capital contributions from parent |  |  | 265 |  |  |  |  |  | 265
Contributions from noncontrolling interest |  |  |  |  |  |  | 29 |  | 29
Other |  |  | (1) |  |  |  |  |  | (1)
Ending balance, June 30, 2022 | $66 |  | $1,968 |  | $1,120 |  | $29 |  | $3,183
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $66 |  | $1,459 |  | $953 |  | $— |  | $2,478
Net income |  |  |  |  | 122 |  |  |  | 122
Common stock dividends |  |  |  |  | (85) |  |  |  | (85)
Capital contributions from parent |  |  | 210 |  |  |  |  |  | 210
Ending balance, June 30, 2021 | $66 |  | $1,669 |  | $990 |  | $— |  | $2,725
WPL [Member] |
Common Equity [Line Items] |
Common Equity | COMMON EQUITY Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:
Shares outstanding, January 1, 2022 | 250,474,529 |
Shareowner Direct Plan | 228,935 |
Equity-based compensation plans | 222,768 |
Shares outstanding, June 30, 2022 | 250,926,232 |
Noncontrolling Interest - In the second quarter of 2022, WPL and the tax equity partner contributed to the joint venture associated with certain WPL solar generation projects. Earnings, tax attributes and cash flows from the joint venture will be allocated to both the WPL subsidiary and the tax equity partner in varying percentages by category and over the life of the partnership. The tax equity partner's contributions, net of these allocations, is represented as a noncontrolling interest within total equity on Alliant Energy’s and WPL’s balance sheets. Refer to Note 1(b) for additional information. Changes in Shareowners’ Equity - A summary of changes in shareowners’ equity was as follows (in millions):
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  |  |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  |  |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | Interest |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $3 |  | $2,750 |  | $3,336 |  | $— |  | ($12) |  | $— |  | $6,077
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 159 |  |  |  |  |  |  |  | 159
Common stock dividends ($0.4275 per share) |  |  |  |  | (108) |  |  |  |  |  |  |  | (108)
Shareowner Direct Plan issuances |  |  | 6 |  |  |  |  |  |  |  |  |  | 6
Equity-based compensation plans and other |  |  | 3 |  |  |  |  |  |  |  |  |  | 3
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  |  |  | 29 |  | 29
Ending balance, June 30, 2022 | $3 |  | $2,759 |  | $3,387 |  | $— |  | ($12) |  | $29 |  | $6,166
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  | Cumulative |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  | Preferred |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Stock |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | of IPL |  | Equity
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $3 |  | $2,712 |  | $3,063 |  | ($1) |  | ($11) |  | $200 |  | $5,966
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 144 |  |  |  |  |  |  |  | 144
Common stock dividends ($0.4025 per share) |  |  |  |  | (101) |  |  |  |  |  |  |  | (101)
Shareowner Direct Plan issuances |  |  | 7 |  |  |  |  |  |  |  |  |  | 7
Equity-based compensation plans and other |  |  | 3 |  |  |  |  |  |  |  |  |  | 3
Ending balance, June 30, 2021 | $3 |  | $2,722 |  | $3,106 |  | ($1) |  | ($11) |  | $200 |  | $6,019
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  |  |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  |  |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | Interest |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $3 |  | $2,749 |  | $3,250 |  | $— |  | ($12) |  | $— |  | $5,990
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 351 |  |  |  |  |  |  |  | 351
Common stock dividends ($0.855 per share) |  |  |  |  | (215) |  |  |  |  |  |  |  | (215)
Shareowner Direct Plan issuances |  |  | 13 |  |  |  |  |  |  |  |  |  | 13
Equity-based compensation plans and other |  |  | (3) |  | 1 |  |  |  |  |  |  |  | (2)
Contributions from noncontrolling interest |  |  |  |  |  |  |  |  |  |  | 29 |  | 29
Ending balance, June 30, 2022 | $3 |  | $2,759 |  | $3,387 |  | $— |  | ($12) |  | $29 |  | $6,166
Alliant Energy | Total Alliant Energy Common Equity |  |  |  |
|  |  |  |  |  |  | Accumulated |  | Shares in |  | Cumulative |  |
|  |  | Additional |  |  |  | Other |  | Deferred |  | Preferred |  |
| Common |  | Paid-In |  | Retained |  | Comprehensive |  | Compensation |  | Stock |  | Total
| Stock |  | Capital |  | Earnings |  | Loss |  | Trust |  | of IPL |  | Equity
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $2 |  | $2,704 |  | $2,994 |  | ($1) |  | ($11) |  | $200 |  | $5,888
Net income attributable to Alliant Energy common shareowners |  |  |  |  | 315 |  |  |  |  |  |  |  | 315
Common stock dividends ($0.805 per share) |  |  |  |  | (203) |  |  |  |  |  |  |  | (203)
Shareowner Direct Plan issuances | 1 |  | 14 |  |  |  |  |  |  |  |  |  | 15
Equity-based compensation plans and other |  |  | 4 |  |  |  |  |  |  |  |  |  | 4
Ending balance, June 30, 2021 | $3 |  | $2,722 |  | $3,106 |  | ($1) |  | ($11) |  | $200 |  | $6,019
IPL | Total IPL Common Equity |  |  |  |
|  |  | Additional |  |  |  | Cumulative |  |
| Common |  | Paid-In |  | Retained |  | Preferred |  | Total
| Stock |  | Capital |  | Earnings |  | Stock |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $33 |  | $2,807 |  | $935 |  | $— |  | $3,775
Net income available for common stock |  |  |  |  | 87 |  |  |  | 87
Common stock dividends |  |  |  |  | (80) |  |  |  | (80)
Ending balance, June 30, 2022 | $33 |  | $2,807 |  | $942 |  | $— |  | $3,782
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $33 |  | $2,752 |  | $957 |  | $200 |  | $3,942
Net income available for common stock |  |  |  |  | 86 |  |  |  | 86
Common stock dividends |  |  |  |  | (99) |  |  |  | (99)
Capital contributions from parent |  |  | 50 |  |  |  |  |  | 50
Ending balance, June 30, 2021 | $33 |  | $2,802 |  | $944 |  | $200 |  | $3,979
IPL | Total IPL Common Equity |  |  |  |
|  |  | Additional |  |  |  | Cumulative |  |
| Common |  | Paid-In |  | Retained |  | Preferred |  | Total
| Stock |  | Capital |  | Earnings |  | Stock |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $33 |  | $2,807 |  | $929 |  | $— |  | $3,769
Net income available for common stock |  |  |  |  | 173 |  |  |  | 173
Common stock dividends |  |  |  |  | (160) |  |  |  | (160)
Ending balance, June 30, 2022 | $33 |  | $2,807 |  | $942 |  | $— |  | $3,782
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $33 |  | $2,752 |  | $979 |  | $200 |  | $3,964
Net income available for common stock |  |  |  |  | 165 |  |  |  | 165
Common stock dividends |  |  |  |  | (200) |  |  |  | (200)
Capital contributions from parent |  |  | 50 |  |  |  |  |  | 50
Ending balance, June 30, 2021 | $33 |  | $2,802 |  | $944 |  | $200 |  | $3,979
WPL | Total WPL Common Equity |  |  |  |
|  |  | Additional |  |  |  |  |  |
| Common |  | Paid-In |  | Retained |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Interest |  | Equity
Three Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2022 | $66 |  | $1,884 |  | $1,101 |  | $— |  | $3,051
Net income |  |  |  |  | 63 |  |  |  | 63
Common stock dividends |  |  |  |  | (44) |  |  |  | (44)
Capital contributions from parent |  |  | 85 |  |  |  |  |  | 85
Contributions from noncontrolling interest |  |  |  |  |  |  | 29 |  | 29
Other |  |  | (1) |  |  |  |  |  | (1)
Ending balance, June 30, 2022 | $66 |  | $1,968 |  | $1,120 |  | $29 |  | $3,183
Three Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, March 31, 2021 | $66 |  | $1,584 |  | $995 |  | $— |  | $2,645
Net income |  |  |  |  | 38 |  |  |  | 38
Common stock dividends |  |  |  |  | (43) |  |  |  | (43)
Capital contributions from parent |  |  | 85 |  |  |  |  |  | 85
Ending balance, June 30, 2021 | $66 |  | $1,669 |  | $990 |  | $— |  | $2,725
WPL | Total WPL Common Equity |  |  |  |
|  |  | Additional |  |  |  |  |  |
| Common |  | Paid-In |  | Retained |  | Noncontrolling |  | Total
| Stock |  | Capital |  | Earnings |  | Interest |  | Equity
Six Months Ended June 30, 2022 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2021 | $66 |  | $1,704 |  | $1,053 |  | $— |  | $2,823
Net income |  |  |  |  | 156 |  |  |  | 156
Common stock dividends |  |  |  |  | (89) |  |  |  | (89)
Capital contributions from parent |  |  | 265 |  |  |  |  |  | 265
Contributions from noncontrolling interest |  |  |  |  |  |  | 29 |  | 29
Other |  |  | (1) |  |  |  |  |  | (1)
Ending balance, June 30, 2022 | $66 |  | $1,968 |  | $1,120 |  | $29 |  | $3,183
Six Months Ended June 30, 2021 |  |  |  |  |  |  |  |  |
Beginning balance, December 31, 2020 | $66 |  | $1,459 |  | $953 |  | $— |  | $2,478
Net income |  |  |  |  | 122 |  |  |  | 122
Common stock dividends |  |  |  |  | (85) |  |  |  | (85)
Capital contributions from parent |  |  | 210 |  |  |  |  |  | 210
Ending balance, June 30, 2021 | $66 |  | $1,669 |  | $990 |  | $— |  | $2,725

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