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Common Equity
6 Months Ended
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 Plan228,935 
Equity-based compensation plans222,768 
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 EnergyTotal Alliant Energy Common Equity
AccumulatedShares in
AdditionalOtherDeferred
CommonPaid-InRetainedComprehensiveCompensationNoncontrollingTotal
StockCapitalEarningsLossTrustInterestEquity
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 shareowners159159
Common stock dividends ($0.4275 per share)
(108)(108)
Shareowner Direct Plan issuances66
Equity-based compensation plans and other33
Contributions from noncontrolling interest2929
Ending balance, June 30, 2022
$3$2,759$3,387$—($12)$29$6,166
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares inCumulative
AdditionalOtherDeferredPreferred
CommonPaid-InRetainedComprehensiveCompensationStockTotal
StockCapitalEarningsLossTrustof IPLEquity
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 shareowners144144
Common stock dividends ($0.4025 per share)
(101)(101)
Shareowner Direct Plan issuances77
Equity-based compensation plans and other33
Ending balance, June 30, 2021
$3$2,722$3,106($1)($11)$200$6,019
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares in
AdditionalOtherDeferred
CommonPaid-InRetainedComprehensiveCompensationNoncontrollingTotal
StockCapitalEarningsLossTrustInterestEquity
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 shareowners351351
Common stock dividends ($0.855 per share)
(215)(215)
Shareowner Direct Plan issuances1313
Equity-based compensation plans and other(3)1(2)
Contributions from noncontrolling interest2929
Ending balance, June 30, 2022
$3$2,759$3,387$—($12)$29$6,166
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares inCumulative
AdditionalOtherDeferredPreferred
CommonPaid-InRetainedComprehensiveCompensationStockTotal
StockCapitalEarningsLossTrustof IPLEquity
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 shareowners315315
Common stock dividends ($0.805 per share)
(203)(203)
Shareowner Direct Plan issuances11415
Equity-based compensation plans and other44
Ending balance, June 30, 2021
$3$2,722$3,106($1)($11)$200$6,019
IPLTotal IPL Common Equity
AdditionalCumulative
CommonPaid-InRetainedPreferredTotal
StockCapitalEarningsStockEquity
Three Months Ended June 30, 2022
Beginning balance, March 31, 2022
$33$2,807$935$—$3,775
Net income available for common stock8787
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 stock8686
Common stock dividends(99)(99)
Capital contributions from parent5050
Ending balance, June 30, 2021
$33$2,802$944$200$3,979
IPLTotal IPL Common Equity
AdditionalCumulative
CommonPaid-InRetainedPreferredTotal
StockCapitalEarningsStockEquity
Six Months Ended June 30, 2022
Beginning balance, December 31, 2021
$33$2,807$929$—$3,769
Net income available for common stock173173
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 stock165165
Common stock dividends(200)(200)
Capital contributions from parent5050
Ending balance, June 30, 2021
$33$2,802$944$200$3,979
WPLTotal WPL Common Equity
Additional
CommonPaid-InRetainedNoncontrollingTotal
StockCapitalEarningsInterestEquity
Three Months Ended June 30, 2022
Beginning balance, March 31, 2022
$66$1,884$1,101$—$3,051
Net income6363
Common stock dividends(44)(44)
Capital contributions from parent8585
Contributions from noncontrolling interest2929
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 income3838
Common stock dividends(43)(43)
Capital contributions from parent8585
Ending balance, June 30, 2021
$66$1,669$990$—$2,725
WPLTotal WPL Common Equity
Additional
CommonPaid-InRetainedNoncontrollingTotal
StockCapitalEarningsInterestEquity
Six Months Ended June 30, 2022
Beginning balance, December 31, 2021
$66$1,704$1,053$—$2,823
Net income156156
Common stock dividends(89)(89)
Capital contributions from parent265265
Contributions from noncontrolling interest2929
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 income122122
Common stock dividends(85)(85)
Capital contributions from parent210210
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 Plan228,935 
Equity-based compensation plans222,768 
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 EnergyTotal Alliant Energy Common Equity
AccumulatedShares in
AdditionalOtherDeferred
CommonPaid-InRetainedComprehensiveCompensationNoncontrollingTotal
StockCapitalEarningsLossTrustInterestEquity
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 shareowners159159
Common stock dividends ($0.4275 per share)
(108)(108)
Shareowner Direct Plan issuances66
Equity-based compensation plans and other33
Contributions from noncontrolling interest2929
Ending balance, June 30, 2022
$3$2,759$3,387$—($12)$29$6,166
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares inCumulative
AdditionalOtherDeferredPreferred
CommonPaid-InRetainedComprehensiveCompensationStockTotal
StockCapitalEarningsLossTrustof IPLEquity
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 shareowners144144
Common stock dividends ($0.4025 per share)
(101)(101)
Shareowner Direct Plan issuances77
Equity-based compensation plans and other33
Ending balance, June 30, 2021
$3$2,722$3,106($1)($11)$200$6,019
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares in
AdditionalOtherDeferred
CommonPaid-InRetainedComprehensiveCompensationNoncontrollingTotal
StockCapitalEarningsLossTrustInterestEquity
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 shareowners351351
Common stock dividends ($0.855 per share)
(215)(215)
Shareowner Direct Plan issuances1313
Equity-based compensation plans and other(3)1(2)
Contributions from noncontrolling interest2929
Ending balance, June 30, 2022
$3$2,759$3,387$—($12)$29$6,166
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares inCumulative
AdditionalOtherDeferredPreferred
CommonPaid-InRetainedComprehensiveCompensationStockTotal
StockCapitalEarningsLossTrustof IPLEquity
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 shareowners315315
Common stock dividends ($0.805 per share)
(203)(203)
Shareowner Direct Plan issuances11415
Equity-based compensation plans and other44
Ending balance, June 30, 2021
$3$2,722$3,106($1)($11)$200$6,019
IPLTotal IPL Common Equity
AdditionalCumulative
CommonPaid-InRetainedPreferredTotal
StockCapitalEarningsStockEquity
Three Months Ended June 30, 2022
Beginning balance, March 31, 2022
$33$2,807$935$—$3,775
Net income available for common stock8787
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 stock8686
Common stock dividends(99)(99)
Capital contributions from parent5050
Ending balance, June 30, 2021
$33$2,802$944$200$3,979
IPLTotal IPL Common Equity
AdditionalCumulative
CommonPaid-InRetainedPreferredTotal
StockCapitalEarningsStockEquity
Six Months Ended June 30, 2022
Beginning balance, December 31, 2021
$33$2,807$929$—$3,769
Net income available for common stock173173
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 stock165165
Common stock dividends(200)(200)
Capital contributions from parent5050
Ending balance, June 30, 2021
$33$2,802$944$200$3,979
WPLTotal WPL Common Equity
Additional
CommonPaid-InRetainedNoncontrollingTotal
StockCapitalEarningsInterestEquity
Three Months Ended June 30, 2022
Beginning balance, March 31, 2022
$66$1,884$1,101$—$3,051
Net income6363
Common stock dividends(44)(44)
Capital contributions from parent8585
Contributions from noncontrolling interest2929
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 income3838
Common stock dividends(43)(43)
Capital contributions from parent8585
Ending balance, June 30, 2021
$66$1,669$990$—$2,725
WPLTotal WPL Common Equity
Additional
CommonPaid-InRetainedNoncontrollingTotal
StockCapitalEarningsInterestEquity
Six Months Ended June 30, 2022
Beginning balance, December 31, 2021
$66$1,704$1,053$—$2,823
Net income156156
Common stock dividends(89)(89)
Capital contributions from parent265265
Contributions from noncontrolling interest2929
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 income122122
Common stock dividends(85)(85)
Capital contributions from parent210210
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 Plan228,935 
Equity-based compensation plans222,768 
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 EnergyTotal Alliant Energy Common Equity
AccumulatedShares in
AdditionalOtherDeferred
CommonPaid-InRetainedComprehensiveCompensationNoncontrollingTotal
StockCapitalEarningsLossTrustInterestEquity
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 shareowners159159
Common stock dividends ($0.4275 per share)
(108)(108)
Shareowner Direct Plan issuances66
Equity-based compensation plans and other33
Contributions from noncontrolling interest2929
Ending balance, June 30, 2022
$3$2,759$3,387$—($12)$29$6,166
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares inCumulative
AdditionalOtherDeferredPreferred
CommonPaid-InRetainedComprehensiveCompensationStockTotal
StockCapitalEarningsLossTrustof IPLEquity
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 shareowners144144
Common stock dividends ($0.4025 per share)
(101)(101)
Shareowner Direct Plan issuances77
Equity-based compensation plans and other33
Ending balance, June 30, 2021
$3$2,722$3,106($1)($11)$200$6,019
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares in
AdditionalOtherDeferred
CommonPaid-InRetainedComprehensiveCompensationNoncontrollingTotal
StockCapitalEarningsLossTrustInterestEquity
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 shareowners351351
Common stock dividends ($0.855 per share)
(215)(215)
Shareowner Direct Plan issuances1313
Equity-based compensation plans and other(3)1(2)
Contributions from noncontrolling interest2929
Ending balance, June 30, 2022
$3$2,759$3,387$—($12)$29$6,166
Alliant EnergyTotal Alliant Energy Common Equity
AccumulatedShares inCumulative
AdditionalOtherDeferredPreferred
CommonPaid-InRetainedComprehensiveCompensationStockTotal
StockCapitalEarningsLossTrustof IPLEquity
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 shareowners315315
Common stock dividends ($0.805 per share)
(203)(203)
Shareowner Direct Plan issuances11415
Equity-based compensation plans and other44
Ending balance, June 30, 2021
$3$2,722$3,106($1)($11)$200$6,019
IPLTotal IPL Common Equity
AdditionalCumulative
CommonPaid-InRetainedPreferredTotal
StockCapitalEarningsStockEquity
Three Months Ended June 30, 2022
Beginning balance, March 31, 2022
$33$2,807$935$—$3,775
Net income available for common stock8787
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 stock8686
Common stock dividends(99)(99)
Capital contributions from parent5050
Ending balance, June 30, 2021
$33$2,802$944$200$3,979
IPLTotal IPL Common Equity
AdditionalCumulative
CommonPaid-InRetainedPreferredTotal
StockCapitalEarningsStockEquity
Six Months Ended June 30, 2022
Beginning balance, December 31, 2021
$33$2,807$929$—$3,769
Net income available for common stock173173
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 stock165165
Common stock dividends(200)(200)
Capital contributions from parent5050
Ending balance, June 30, 2021
$33$2,802$944$200$3,979
WPLTotal WPL Common Equity
Additional
CommonPaid-InRetainedNoncontrollingTotal
StockCapitalEarningsInterestEquity
Three Months Ended June 30, 2022
Beginning balance, March 31, 2022
$66$1,884$1,101$—$3,051
Net income6363
Common stock dividends(44)(44)
Capital contributions from parent8585
Contributions from noncontrolling interest2929
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 income3838
Common stock dividends(43)(43)
Capital contributions from parent8585
Ending balance, June 30, 2021
$66$1,669$990$—$2,725
WPLTotal WPL Common Equity
Additional
CommonPaid-InRetainedNoncontrollingTotal
StockCapitalEarningsInterestEquity
Six Months Ended June 30, 2022
Beginning balance, December 31, 2021
$66$1,704$1,053$—$2,823
Net income156156
Common stock dividends(89)(89)
Capital contributions from parent265265
Contributions from noncontrolling interest2929
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 income122122
Common stock dividends(85)(85)
Capital contributions from parent210210
Ending balance, June 30, 2021
$66$1,669$990$—$2,725