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Common Equity
 9 Months Ended
Sep. 30, 2019
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, 2019
236,063,279

Equity forward agreements
3,790,300

Shareowner Direct Plan
390,630

Equity-based compensation plans
101,478

Other
(2,738
)
Shares outstanding, September 30, 2019
240,342,949



Equity Forward Agreements - In December 2018, Alliant Energy entered into forward sale agreements with various counterparties in connection with a public offering of 8,358,973 shares of Alliant Energy common stock. The initial forward sale price of $44.33 per share is subject to daily adjustment based on a floating interest rate factor, and will decrease by other fixed amounts specified in the forward sale agreements. In 2019, Alliant Energy settled $167 million under the forward sale agreements by delivering 3,790,300 shares of newly issued Alliant Energy common stock at a weighted average forward sale price of $43.99 per share. Alliant Energy used the net proceeds from the settlements for general corporate purposes. As of September 30, 2019, 671,237 incremental shares were included in the calculation of diluted EPS related to the remaining securities under the forward sale agreements.

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
 
Cumulative
 
 
 
 
 
Additional
 
 
 
Other
 
Deferred
 
Preferred
 
 
 
Common
 
Paid-In
 
Retained
 
Comprehensive
 
Compensation
 
Stock
 
Total
 
Stock
 
Capital
 
Earnings
 
Income (Loss)
 
Trust
 
of IPL
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$2.4

 

$2,108.4

 

$2,597.8

 

$1.0

 

($10.0
)
 

$200.0

 

$4,899.6

Net income attributable to Alliant Energy common shareowners
 
 
 
 
226.0

 
 
 
 
 
 
 
226.0

Common stock dividends ($0.355 per share)
 
 
 
 
(84.7
)
 
 
 
 
 
 
 
(84.7
)
Equity forward settlements and Shareowner Direct Plan issuances


 
124.8

 
 
 
 
 
 
 
 
 
124.8

Equity-based compensation plans and other
 
 
3.7

 
 
 
 
 
(0.2
)
 
 
 
3.5

Ending balance, September 30

$2.4

 

$2,236.9

 

$2,739.1

 

$1.0

 

($10.2
)
 

$200.0

 

$5,169.2

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$2.3

 

$1,947.2

 

$2,412.5

 

$0.1

 

($11.4
)
 

$200.0

 

$4,550.7

Net income attributable to Alliant Energy common shareowners
 
 
 
 
205.5

 
 
 
 
 
 
 
205.5

Common stock dividends ($0.335 per share)
 
 
 
 
(78.5
)
 
 
 
 
 
 
 
(78.5
)
At-the-market offering program and Shareowner Direct Plan issuances
0.1

 
91.1

 
 
 
 
 
 
 
 
 
91.2

Equity-based compensation plans and other
 
 
(0.1
)
 
 
 
 
 
1.9

 
 
 
1.8

Other comprehensive loss, net of tax
 
 
 
 
 
 
(0.3
)
 
 
 
 
 
(0.3
)
Ending balance, September 30

$2.4

 

$2,038.2

 

$2,539.5

 

($0.2
)
 

($9.5
)
 

$200.0

 

$4,770.4

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
 
Income (Loss)
 
Trust
 
of IPL
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$2.4

 

$2,045.5

 

$2,545.9

 

$1.7

 

($9.8
)
 

$200.0

 

$4,785.7

Net income attributable to Alliant Energy common shareowners
 
 
 
 
445.7

 
 
 
 
 
 
 
445.7

Common stock dividends ($1.065 per share)
 
 
 
 
(252.5
)
 
 
 
 
 
 
 
(252.5
)
Equity forward settlements and Shareowner Direct Plan issuances


 
185.4

 
 
 
 
 
 
 
 
 
185.4

Equity-based compensation plans and other
 
 
6.0

 
 
 
 
 
(0.4
)
 
 
 
5.6

Other comprehensive loss, net of tax
 
 
 
 
 
 
(0.7
)
 
 
 
 
 
(0.7
)
Ending balance, September 30

$2.4

 

$2,236.9

 

$2,739.1

 

$1.0

 

($10.2
)
 

$200.0

 

$5,169.2

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$2.3

 

$1,845.5

 

$2,346.0

 

($0.5
)
 

($11.1
)
 

$200.0

 

$4,382.2

Net income attributable to Alliant Energy common shareowners
 
 
 
 
426.8

 
 
 
 
 
 
 
426.8

Common stock dividends ($1.005 per share)
 
 
 
 
(233.3
)
 
 
 
 
 
 
 
(233.3
)
At-the-market offering program and Shareowner Direct Plan issuances
0.1

 
191.2

 
 
 
 
 
 
 
 
 
191.3

Equity-based compensation plans and other
 
 
1.5

 
 
 
 
 
1.6

 
 
 
3.1

Other comprehensive income, net of tax
 
 
 
 
 
 
0.3

 
 
 
 
 
0.3

Ending balance, September 30

$2.4

 

$2,038.2

 

$2,539.5

 

($0.2
)
 

($9.5
)
 

$200.0

 

$4,770.4

IPL
Total IPL Common Equity
 
 
 
 
 
 
 
Additional
 
 
 
Cumulative
 
 
 
Common
 
Paid-In
 
Retained
 
Preferred
 
Total
 
Stock
 
Capital
 
Earnings
 
Stock
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$33.4

 

$2,322.8

 

$788.9

 

$200.0

 

$3,345.1

Earnings available for common stock
 
 
 
 
141.1

 
 
 
141.1

Common stock dividends
 
 
 
 
(42.1
)
 
 
 
(42.1
)
Ending balance, September 30

$33.4

 

$2,322.8

 

$887.9

 

$200.0

 

$3,444.1

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$33.4

 

$1,927.8

 

$692.9

 

$200.0

 

$2,854.1

Earnings available for common stock
 
 
 
 
126.5

 
 
 
126.5

Common stock dividends
 
 
 
 
(41.9
)
 
 
 
(41.9
)
Capital contributions from parent
 
 
100.0

 
 
 
 
 
100.0

Ending balance, September 30

$33.4

 

$2,027.8

 

$777.5

 

$200.0

 

$3,038.7

IPL
Total IPL Common Equity
 
 
 
 
 
 
 
Additional
 
 
 
Cumulative
 
 
 
Common
 
Paid-In
 
Retained
 
Preferred
 
Total
 
Stock
 
Capital
 
Earnings
 
Stock
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$33.4

 

$2,222.8

 

$774.5

 

$200.0

 

$3,230.7

Earnings available for common stock
 
 
 
 
239.4

 
 
 
239.4

Common stock dividends
 
 
 
 
(126.0
)
 
 
 
(126.0
)
Capital contributions from parent
 
 
100.0

 
 
 
 
 
100.0

Ending balance, September 30

$33.4

 

$2,322.8

 

$887.9

 

$200.0

 

$3,444.1

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$33.4

 

$1,797.8

 

$678.5

 

$200.0

 

$2,709.7

Earnings available for common stock
 
 
 
 
224.9

 
 
 
224.9

Common stock dividends
 
 
 
 
(125.9
)
 
 
 
(125.9
)
Capital contributions from parent
 
 
230.0

 
 
 
 
 
230.0

Ending balance, September 30

$33.4

 

$2,027.8

 

$777.5

 

$200.0

 

$3,038.7

WPL
 
 
Additional
 
 
 
Total
 
Common
 
Paid-In
 
Retained
 
Common
 
Stock
 
Capital
 
Earnings
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Beginning balance, July 1

$66.2

 

$1,309.0

 

$810.0

 

$2,185.2

Earnings available for common stock
 
 
 
 
75.5

 
75.5

Common stock dividends
 
 
 
 
(35.9
)
 
(35.9
)
Capital contributions from parent
 
 
100.0

 
 
 
100.0

Ending balance, September 30

$66.2

 

$1,409.0

 

$849.6

 

$2,324.8

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Beginning balance, July 1

$66.2

 

$1,259.0

 

$730.0

 

$2,055.2

Earnings available for common stock
 
 
 
 
76.3

 
76.3

Common stock dividends
 
 
 
 
(34.9
)
 
(34.9
)
Capital contributions from parent
 
 
50.0

 
 
 
50.0

Ending balance, September 30

$66.2

 

$1,309.0

 

$771.4

 

$2,146.6


WPL
 
 
Additional
 
 
 
Total
 
Common
 
Paid-In
 
Retained
 
Common
 
Stock
 
Capital
 
Earnings
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Beginning balance, January 1

$66.2

 

$1,309.0

 

$774.3

 

$2,149.5

Earnings available for common stock
 
 
 
 
183.2

 
183.2

Common stock dividends
 
 
 
 
(107.9
)
 
(107.9
)
Capital contributions from parent
 
 
100.0

 
 
 
100.0

Ending balance, September 30

$66.2

 

$1,409.0

 

$849.6

 

$2,324.8

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Beginning balance, January 1

$66.2

 

$1,109.0

 

$706.3

 

$1,881.5

Earnings available for common stock
 
 
 
 
170.1

 
170.1

Common stock dividends
 
 
 
 
(105.0
)
 
(105.0
)
Capital contributions from parent
 
 
200.0

 
 
 
200.0

Ending balance, September 30

$66.2

 

$1,309.0

 

$771.4

 

$2,146.6



Comprehensive Income - For the three and nine months ended September 30, 2019 and 2018, Alliant Energy’s other comprehensive income was not material; therefore, its comprehensive income was substantially equal to its net income and its comprehensive income attributable to Alliant Energy common shareowners was substantially equal to its net income attributable to Alliant Energy common shareowners for such periods. For the three and nine months ended September 30, 2019 and 2018, IPL and WPL had no other comprehensive income; therefore, their comprehensive income was equal to their net income and their comprehensive income available for common stock was equal to their earnings available for common stock for such periods.
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, 2019
236,063,279

Equity forward agreements
3,790,300

Shareowner Direct Plan
390,630

Equity-based compensation plans
101,478

Other
(2,738
)
Shares outstanding, September 30, 2019
240,342,949



Equity Forward Agreements - In December 2018, Alliant Energy entered into forward sale agreements with various counterparties in connection with a public offering of 8,358,973 shares of Alliant Energy common stock. The initial forward sale price of $44.33 per share is subject to daily adjustment based on a floating interest rate factor, and will decrease by other fixed amounts specified in the forward sale agreements. In 2019, Alliant Energy settled $167 million under the forward sale agreements by delivering 3,790,300 shares of newly issued Alliant Energy common stock at a weighted average forward sale price of $43.99 per share. Alliant Energy used the net proceeds from the settlements for general corporate purposes. As of September 30, 2019, 671,237 incremental shares were included in the calculation of diluted EPS related to the remaining securities under the forward sale agreements.

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
 
Cumulative
 
 
 
 
 
Additional
 
 
 
Other
 
Deferred
 
Preferred
 
 
 
Common
 
Paid-In
 
Retained
 
Comprehensive
 
Compensation
 
Stock
 
Total
 
Stock
 
Capital
 
Earnings
 
Income (Loss)
 
Trust
 
of IPL
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$2.4

 

$2,108.4

 

$2,597.8

 

$1.0

 

($10.0
)
 

$200.0

 

$4,899.6

Net income attributable to Alliant Energy common shareowners
 
 
 
 
226.0

 
 
 
 
 
 
 
226.0

Common stock dividends ($0.355 per share)
 
 
 
 
(84.7
)
 
 
 
 
 
 
 
(84.7
)
Equity forward settlements and Shareowner Direct Plan issuances


 
124.8

 
 
 
 
 
 
 
 
 
124.8

Equity-based compensation plans and other
 
 
3.7

 
 
 
 
 
(0.2
)
 
 
 
3.5

Ending balance, September 30

$2.4

 

$2,236.9

 

$2,739.1

 

$1.0

 

($10.2
)
 

$200.0

 

$5,169.2

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$2.3

 

$1,947.2

 

$2,412.5

 

$0.1

 

($11.4
)
 

$200.0

 

$4,550.7

Net income attributable to Alliant Energy common shareowners
 
 
 
 
205.5

 
 
 
 
 
 
 
205.5

Common stock dividends ($0.335 per share)
 
 
 
 
(78.5
)
 
 
 
 
 
 
 
(78.5
)
At-the-market offering program and Shareowner Direct Plan issuances
0.1

 
91.1

 
 
 
 
 
 
 
 
 
91.2

Equity-based compensation plans and other
 
 
(0.1
)
 
 
 
 
 
1.9

 
 
 
1.8

Other comprehensive loss, net of tax
 
 
 
 
 
 
(0.3
)
 
 
 
 
 
(0.3
)
Ending balance, September 30

$2.4

 

$2,038.2

 

$2,539.5

 

($0.2
)
 

($9.5
)
 

$200.0

 

$4,770.4

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
 
Income (Loss)
 
Trust
 
of IPL
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$2.4

 

$2,045.5

 

$2,545.9

 

$1.7

 

($9.8
)
 

$200.0

 

$4,785.7

Net income attributable to Alliant Energy common shareowners
 
 
 
 
445.7

 
 
 
 
 
 
 
445.7

Common stock dividends ($1.065 per share)
 
 
 
 
(252.5
)
 
 
 
 
 
 
 
(252.5
)
Equity forward settlements and Shareowner Direct Plan issuances


 
185.4

 
 
 
 
 
 
 
 
 
185.4

Equity-based compensation plans and other
 
 
6.0

 
 
 
 
 
(0.4
)
 
 
 
5.6

Other comprehensive loss, net of tax
 
 
 
 
 
 
(0.7
)
 
 
 
 
 
(0.7
)
Ending balance, September 30

$2.4

 

$2,236.9

 

$2,739.1

 

$1.0

 

($10.2
)
 

$200.0

 

$5,169.2

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$2.3

 

$1,845.5

 

$2,346.0

 

($0.5
)
 

($11.1
)
 

$200.0

 

$4,382.2

Net income attributable to Alliant Energy common shareowners
 
 
 
 
426.8

 
 
 
 
 
 
 
426.8

Common stock dividends ($1.005 per share)
 
 
 
 
(233.3
)
 
 
 
 
 
 
 
(233.3
)
At-the-market offering program and Shareowner Direct Plan issuances
0.1

 
191.2

 
 
 
 
 
 
 
 
 
191.3

Equity-based compensation plans and other
 
 
1.5

 
 
 
 
 
1.6

 
 
 
3.1

Other comprehensive income, net of tax
 
 
 
 
 
 
0.3

 
 
 
 
 
0.3

Ending balance, September 30

$2.4

 

$2,038.2

 

$2,539.5

 

($0.2
)
 

($9.5
)
 

$200.0

 

$4,770.4

IPL
Total IPL Common Equity
 
 
 
 
 
 
 
Additional
 
 
 
Cumulative
 
 
 
Common
 
Paid-In
 
Retained
 
Preferred
 
Total
 
Stock
 
Capital
 
Earnings
 
Stock
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$33.4

 

$2,322.8

 

$788.9

 

$200.0

 

$3,345.1

Earnings available for common stock
 
 
 
 
141.1

 
 
 
141.1

Common stock dividends
 
 
 
 
(42.1
)
 
 
 
(42.1
)
Ending balance, September 30

$33.4

 

$2,322.8

 

$887.9

 

$200.0

 

$3,444.1

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$33.4

 

$1,927.8

 

$692.9

 

$200.0

 

$2,854.1

Earnings available for common stock
 
 
 
 
126.5

 
 
 
126.5

Common stock dividends
 
 
 
 
(41.9
)
 
 
 
(41.9
)
Capital contributions from parent
 
 
100.0

 
 
 
 
 
100.0

Ending balance, September 30

$33.4

 

$2,027.8

 

$777.5

 

$200.0

 

$3,038.7

IPL
Total IPL Common Equity
 
 
 
 
 
 
 
Additional
 
 
 
Cumulative
 
 
 
Common
 
Paid-In
 
Retained
 
Preferred
 
Total
 
Stock
 
Capital
 
Earnings
 
Stock
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$33.4

 

$2,222.8

 

$774.5

 

$200.0

 

$3,230.7

Earnings available for common stock
 
 
 
 
239.4

 
 
 
239.4

Common stock dividends
 
 
 
 
(126.0
)
 
 
 
(126.0
)
Capital contributions from parent
 
 
100.0

 
 
 
 
 
100.0

Ending balance, September 30

$33.4

 

$2,322.8

 

$887.9

 

$200.0

 

$3,444.1

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$33.4

 

$1,797.8

 

$678.5

 

$200.0

 

$2,709.7

Earnings available for common stock
 
 
 
 
224.9

 
 
 
224.9

Common stock dividends
 
 
 
 
(125.9
)
 
 
 
(125.9
)
Capital contributions from parent
 
 
230.0

 
 
 
 
 
230.0

Ending balance, September 30

$33.4

 

$2,027.8

 

$777.5

 

$200.0

 

$3,038.7

WPL
 
 
Additional
 
 
 
Total
 
Common
 
Paid-In
 
Retained
 
Common
 
Stock
 
Capital
 
Earnings
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Beginning balance, July 1

$66.2

 

$1,309.0

 

$810.0

 

$2,185.2

Earnings available for common stock
 
 
 
 
75.5

 
75.5

Common stock dividends
 
 
 
 
(35.9
)
 
(35.9
)
Capital contributions from parent
 
 
100.0

 
 
 
100.0

Ending balance, September 30

$66.2

 

$1,409.0

 

$849.6

 

$2,324.8

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Beginning balance, July 1

$66.2

 

$1,259.0

 

$730.0

 

$2,055.2

Earnings available for common stock
 
 
 
 
76.3

 
76.3

Common stock dividends
 
 
 
 
(34.9
)
 
(34.9
)
Capital contributions from parent
 
 
50.0

 
 
 
50.0

Ending balance, September 30

$66.2

 

$1,309.0

 

$771.4

 

$2,146.6


WPL
 
 
Additional
 
 
 
Total
 
Common
 
Paid-In
 
Retained
 
Common
 
Stock
 
Capital
 
Earnings
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Beginning balance, January 1

$66.2

 

$1,309.0

 

$774.3

 

$2,149.5

Earnings available for common stock
 
 
 
 
183.2

 
183.2

Common stock dividends
 
 
 
 
(107.9
)
 
(107.9
)
Capital contributions from parent
 
 
100.0

 
 
 
100.0

Ending balance, September 30

$66.2

 

$1,409.0

 

$849.6

 

$2,324.8

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Beginning balance, January 1

$66.2

 

$1,109.0

 

$706.3

 

$1,881.5

Earnings available for common stock
 
 
 
 
170.1

 
170.1

Common stock dividends
 
 
 
 
(105.0
)
 
(105.0
)
Capital contributions from parent
 
 
200.0

 
 
 
200.0

Ending balance, September 30

$66.2

 

$1,309.0

 

$771.4

 

$2,146.6



Comprehensive Income - For the three and nine months ended September 30, 2019 and 2018, Alliant Energy’s other comprehensive income was not material; therefore, its comprehensive income was substantially equal to its net income and its comprehensive income attributable to Alliant Energy common shareowners was substantially equal to its net income attributable to Alliant Energy common shareowners for such periods. For the three and nine months ended September 30, 2019 and 2018, IPL and WPL had no other comprehensive income; therefore, their comprehensive income was equal to their net income and their comprehensive income available for common stock was equal to their earnings available for common stock for such periods.
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, 2019
236,063,279

Equity forward agreements
3,790,300

Shareowner Direct Plan
390,630

Equity-based compensation plans
101,478

Other
(2,738
)
Shares outstanding, September 30, 2019
240,342,949



Equity Forward Agreements - In December 2018, Alliant Energy entered into forward sale agreements with various counterparties in connection with a public offering of 8,358,973 shares of Alliant Energy common stock. The initial forward sale price of $44.33 per share is subject to daily adjustment based on a floating interest rate factor, and will decrease by other fixed amounts specified in the forward sale agreements. In 2019, Alliant Energy settled $167 million under the forward sale agreements by delivering 3,790,300 shares of newly issued Alliant Energy common stock at a weighted average forward sale price of $43.99 per share. Alliant Energy used the net proceeds from the settlements for general corporate purposes. As of September 30, 2019, 671,237 incremental shares were included in the calculation of diluted EPS related to the remaining securities under the forward sale agreements.

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
 
Cumulative
 
 
 
 
 
Additional
 
 
 
Other
 
Deferred
 
Preferred
 
 
 
Common
 
Paid-In
 
Retained
 
Comprehensive
 
Compensation
 
Stock
 
Total
 
Stock
 
Capital
 
Earnings
 
Income (Loss)
 
Trust
 
of IPL
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$2.4

 

$2,108.4

 

$2,597.8

 

$1.0

 

($10.0
)
 

$200.0

 

$4,899.6

Net income attributable to Alliant Energy common shareowners
 
 
 
 
226.0

 
 
 
 
 
 
 
226.0

Common stock dividends ($0.355 per share)
 
 
 
 
(84.7
)
 
 
 
 
 
 
 
(84.7
)
Equity forward settlements and Shareowner Direct Plan issuances


 
124.8

 
 
 
 
 
 
 
 
 
124.8

Equity-based compensation plans and other
 
 
3.7

 
 
 
 
 
(0.2
)
 
 
 
3.5

Ending balance, September 30

$2.4

 

$2,236.9

 

$2,739.1

 

$1.0

 

($10.2
)
 

$200.0

 

$5,169.2

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$2.3

 

$1,947.2

 

$2,412.5

 

$0.1

 

($11.4
)
 

$200.0

 

$4,550.7

Net income attributable to Alliant Energy common shareowners
 
 
 
 
205.5

 
 
 
 
 
 
 
205.5

Common stock dividends ($0.335 per share)
 
 
 
 
(78.5
)
 
 
 
 
 
 
 
(78.5
)
At-the-market offering program and Shareowner Direct Plan issuances
0.1

 
91.1

 
 
 
 
 
 
 
 
 
91.2

Equity-based compensation plans and other
 
 
(0.1
)
 
 
 
 
 
1.9

 
 
 
1.8

Other comprehensive loss, net of tax
 
 
 
 
 
 
(0.3
)
 
 
 
 
 
(0.3
)
Ending balance, September 30

$2.4

 

$2,038.2

 

$2,539.5

 

($0.2
)
 

($9.5
)
 

$200.0

 

$4,770.4

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
 
Income (Loss)
 
Trust
 
of IPL
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$2.4

 

$2,045.5

 

$2,545.9

 

$1.7

 

($9.8
)
 

$200.0

 

$4,785.7

Net income attributable to Alliant Energy common shareowners
 
 
 
 
445.7

 
 
 
 
 
 
 
445.7

Common stock dividends ($1.065 per share)
 
 
 
 
(252.5
)
 
 
 
 
 
 
 
(252.5
)
Equity forward settlements and Shareowner Direct Plan issuances


 
185.4

 
 
 
 
 
 
 
 
 
185.4

Equity-based compensation plans and other
 
 
6.0

 
 
 
 
 
(0.4
)
 
 
 
5.6

Other comprehensive loss, net of tax
 
 
 
 
 
 
(0.7
)
 
 
 
 
 
(0.7
)
Ending balance, September 30

$2.4

 

$2,236.9

 

$2,739.1

 

$1.0

 

($10.2
)
 

$200.0

 

$5,169.2

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$2.3

 

$1,845.5

 

$2,346.0

 

($0.5
)
 

($11.1
)
 

$200.0

 

$4,382.2

Net income attributable to Alliant Energy common shareowners
 
 
 
 
426.8

 
 
 
 
 
 
 
426.8

Common stock dividends ($1.005 per share)
 
 
 
 
(233.3
)
 
 
 
 
 
 
 
(233.3
)
At-the-market offering program and Shareowner Direct Plan issuances
0.1

 
191.2

 
 
 
 
 
 
 
 
 
191.3

Equity-based compensation plans and other
 
 
1.5

 
 
 
 
 
1.6

 
 
 
3.1

Other comprehensive income, net of tax
 
 
 
 
 
 
0.3

 
 
 
 
 
0.3

Ending balance, September 30

$2.4

 

$2,038.2

 

$2,539.5

 

($0.2
)
 

($9.5
)
 

$200.0

 

$4,770.4

IPL
Total IPL Common Equity
 
 
 
 
 
 
 
Additional
 
 
 
Cumulative
 
 
 
Common
 
Paid-In
 
Retained
 
Preferred
 
Total
 
Stock
 
Capital
 
Earnings
 
Stock
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$33.4

 

$2,322.8

 

$788.9

 

$200.0

 

$3,345.1

Earnings available for common stock
 
 
 
 
141.1

 
 
 
141.1

Common stock dividends
 
 
 
 
(42.1
)
 
 
 
(42.1
)
Ending balance, September 30

$33.4

 

$2,322.8

 

$887.9

 

$200.0

 

$3,444.1

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
Beginning balance, July 1

$33.4

 

$1,927.8

 

$692.9

 

$200.0

 

$2,854.1

Earnings available for common stock
 
 
 
 
126.5

 
 
 
126.5

Common stock dividends
 
 
 
 
(41.9
)
 
 
 
(41.9
)
Capital contributions from parent
 
 
100.0

 
 
 
 
 
100.0

Ending balance, September 30

$33.4

 

$2,027.8

 

$777.5

 

$200.0

 

$3,038.7

IPL
Total IPL Common Equity
 
 
 
 
 
 
 
Additional
 
 
 
Cumulative
 
 
 
Common
 
Paid-In
 
Retained
 
Preferred
 
Total
 
Stock
 
Capital
 
Earnings
 
Stock
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$33.4

 

$2,222.8

 

$774.5

 

$200.0

 

$3,230.7

Earnings available for common stock
 
 
 
 
239.4

 
 
 
239.4

Common stock dividends
 
 
 
 
(126.0
)
 
 
 
(126.0
)
Capital contributions from parent
 
 
100.0

 
 
 
 
 
100.0

Ending balance, September 30

$33.4

 

$2,322.8

 

$887.9

 

$200.0

 

$3,444.1

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
Beginning balance, January 1

$33.4

 

$1,797.8

 

$678.5

 

$200.0

 

$2,709.7

Earnings available for common stock
 
 
 
 
224.9

 
 
 
224.9

Common stock dividends
 
 
 
 
(125.9
)
 
 
 
(125.9
)
Capital contributions from parent
 
 
230.0

 
 
 
 
 
230.0

Ending balance, September 30

$33.4

 

$2,027.8

 

$777.5

 

$200.0

 

$3,038.7

WPL
 
 
Additional
 
 
 
Total
 
Common
 
Paid-In
 
Retained
 
Common
 
Stock
 
Capital
 
Earnings
 
Equity
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Beginning balance, July 1

$66.2

 

$1,309.0

 

$810.0

 

$2,185.2

Earnings available for common stock
 
 
 
 
75.5

 
75.5

Common stock dividends
 
 
 
 
(35.9
)
 
(35.9
)
Capital contributions from parent
 
 
100.0

 
 
 
100.0

Ending balance, September 30

$66.2

 

$1,409.0

 

$849.6

 

$2,324.8

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Beginning balance, July 1

$66.2

 

$1,259.0

 

$730.0

 

$2,055.2

Earnings available for common stock
 
 
 
 
76.3

 
76.3

Common stock dividends
 
 
 
 
(34.9
)
 
(34.9
)
Capital contributions from parent
 
 
50.0

 
 
 
50.0

Ending balance, September 30

$66.2

 

$1,309.0

 

$771.4

 

$2,146.6


WPL
 
 
Additional
 
 
 
Total
 
Common
 
Paid-In
 
Retained
 
Common
 
Stock
 
Capital
 
Earnings
 
Equity
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Beginning balance, January 1

$66.2

 

$1,309.0

 

$774.3

 

$2,149.5

Earnings available for common stock
 
 
 
 
183.2

 
183.2

Common stock dividends
 
 
 
 
(107.9
)
 
(107.9
)
Capital contributions from parent
 
 
100.0

 
 
 
100.0

Ending balance, September 30

$66.2

 

$1,409.0

 

$849.6

 

$2,324.8

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Beginning balance, January 1

$66.2

 

$1,109.0

 

$706.3

 

$1,881.5

Earnings available for common stock
 
 
 
 
170.1

 
170.1

Common stock dividends
 
 
 
 
(105.0
)
 
(105.0
)
Capital contributions from parent
 
 
200.0

 
 
 
200.0

Ending balance, September 30

$66.2

 

$1,309.0

 

$771.4

 

$2,146.6



Comprehensive Income - For the three and nine months ended September 30, 2019 and 2018, Alliant Energy’s other comprehensive income was not material; therefore, its comprehensive income was substantially equal to its net income and its comprehensive income attributable to Alliant Energy common shareowners was substantially equal to its net income attributable to Alliant Energy common shareowners for such periods. For the three and nine months ended September 30, 2019 and 2018, IPL and WPL had no other comprehensive income; therefore, their comprehensive income was equal to their net income and their comprehensive income available for common stock was equal to their earnings available for common stock for such periods.