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Segments Of Business
9 Months Ended
Sep. 30, 2019
Segment Reporting Information [Line Items]  
Segments Of Business SEGMENTS OF BUSINESS
Alliant Energy - Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations.
 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
Revenues

$915.9

 

$41.5

 

$11.2

 

$968.6

 

$21.6

 

$990.2

Operating income (loss)
283.7

 
(4.7
)
 
2.8

 
281.8

 
8.4

 
290.2

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
216.6

 
9.4

 
226.0

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
Revenues

$861.2

 

$44.8

 

$12.3

 

$918.3

 

$10.3

 

$928.6

Operating income (loss)
248.7

 
(2.0
)
 
0.6

 
247.3

 
8.8

 
256.1

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
202.8

 
2.7

 
205.5

 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,350.5

 

$322.5

 

$33.2

 

$2,706.2

 

$61.4

 

$2,767.6

Operating income
543.0

 
47.7

 
4.2

 
594.9

 
21.9

 
616.8

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
422.6

 
23.1

 
445.7

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,296.2

 

$299.0

 

$36.2

 

$2,631.4

 

$29.6

 

$2,661.0

Operating income
510.2

 
34.9

 
2.9

 
548.0

 
25.0

 
573.0

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
395.0

 
31.8

 
426.8



IPL - Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
 
Electric
 
Gas
 
Other
 
Total
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$560.9

 

$24.8

 

$10.8

 

$596.5

Operating income (loss)
175.1

 
(4.2
)
 
2.6

 
173.5

Earnings available for common stock
 
 
 
 
 
 
141.1

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$509.2

 

$26.7

 

$11.7

 

$547.6

Operating income (loss)
144.7

 
(3.1
)
 
1.5

 
143.1

Earnings available for common stock
 
 
 
 
 
 
126.5

Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$1,373.0

 

$187.8

 

$32.0

 

$1,592.8

Operating income
290.8

 
26.3

 
4.4

 
321.5

Earnings available for common stock
 
 
 
 
 
 
239.4

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$1,337.0

 

$177.0

 

$34.2

 

$1,548.2

Operating income
275.7

 
16.3

 
4.4

 
296.4

Earnings available for common stock
 
 
 
 
 
 
224.9



WPL - Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
 
Electric
 
Gas
 
Other
 
Total
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$355.0

 

$16.7

 

$0.4

 

$372.1

Operating income (loss)
108.6

 
(0.5
)
 
0.2

 
108.3

Earnings available for common stock
 
 
 
 
 
 
75.5

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$352.0

 

$18.1

 

$0.6

 

$370.7

Operating income (loss)
104.0

 
1.1

 
(0.9
)
 
104.2

Earnings available for common stock
 
 
 
 
 
 
76.3

Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$977.5

 

$134.7

 

$1.2

 

$1,113.4

Operating income (loss)
252.2

 
21.4

 
(0.2
)
 
273.4

Earnings available for common stock
 
 
 
 
 
 
183.2

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$959.2

 

$122.0

 

$2.0

 

$1,083.2

Operating income (loss)
234.5

 
18.6

 
(1.5
)
 
251.6

Earnings available for common stock
 
 
 
 
 
 
170.1


IPL [Member]  
Segment Reporting Information [Line Items]  
Segments Of Business SEGMENTS OF BUSINESS
Alliant Energy - Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations.
 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
Revenues

$915.9

 

$41.5

 

$11.2

 

$968.6

 

$21.6

 

$990.2

Operating income (loss)
283.7

 
(4.7
)
 
2.8

 
281.8

 
8.4

 
290.2

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
216.6

 
9.4

 
226.0

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
Revenues

$861.2

 

$44.8

 

$12.3

 

$918.3

 

$10.3

 

$928.6

Operating income (loss)
248.7

 
(2.0
)
 
0.6

 
247.3

 
8.8

 
256.1

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
202.8

 
2.7

 
205.5

 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,350.5

 

$322.5

 

$33.2

 

$2,706.2

 

$61.4

 

$2,767.6

Operating income
543.0

 
47.7

 
4.2

 
594.9

 
21.9

 
616.8

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
422.6

 
23.1

 
445.7

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,296.2

 

$299.0

 

$36.2

 

$2,631.4

 

$29.6

 

$2,661.0

Operating income
510.2

 
34.9

 
2.9

 
548.0

 
25.0

 
573.0

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
395.0

 
31.8

 
426.8



IPL - Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
 
Electric
 
Gas
 
Other
 
Total
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$560.9

 

$24.8

 

$10.8

 

$596.5

Operating income (loss)
175.1

 
(4.2
)
 
2.6

 
173.5

Earnings available for common stock
 
 
 
 
 
 
141.1

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$509.2

 

$26.7

 

$11.7

 

$547.6

Operating income (loss)
144.7

 
(3.1
)
 
1.5

 
143.1

Earnings available for common stock
 
 
 
 
 
 
126.5

Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$1,373.0

 

$187.8

 

$32.0

 

$1,592.8

Operating income
290.8

 
26.3

 
4.4

 
321.5

Earnings available for common stock
 
 
 
 
 
 
239.4

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$1,337.0

 

$177.0

 

$34.2

 

$1,548.2

Operating income
275.7

 
16.3

 
4.4

 
296.4

Earnings available for common stock
 
 
 
 
 
 
224.9



WPL - Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
 
Electric
 
Gas
 
Other
 
Total
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$355.0

 

$16.7

 

$0.4

 

$372.1

Operating income (loss)
108.6

 
(0.5
)
 
0.2

 
108.3

Earnings available for common stock
 
 
 
 
 
 
75.5

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$352.0

 

$18.1

 

$0.6

 

$370.7

Operating income (loss)
104.0

 
1.1

 
(0.9
)
 
104.2

Earnings available for common stock
 
 
 
 
 
 
76.3

Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$977.5

 

$134.7

 

$1.2

 

$1,113.4

Operating income (loss)
252.2

 
21.4

 
(0.2
)
 
273.4

Earnings available for common stock
 
 
 
 
 
 
183.2

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$959.2

 

$122.0

 

$2.0

 

$1,083.2

Operating income (loss)
234.5

 
18.6

 
(1.5
)
 
251.6

Earnings available for common stock
 
 
 
 
 
 
170.1


WPL [Member]  
Segment Reporting Information [Line Items]  
Segments Of Business SEGMENTS OF BUSINESS
Alliant Energy - Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations.
 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
Revenues

$915.9

 

$41.5

 

$11.2

 

$968.6

 

$21.6

 

$990.2

Operating income (loss)
283.7

 
(4.7
)
 
2.8

 
281.8

 
8.4

 
290.2

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
216.6

 
9.4

 
226.0

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
Revenues

$861.2

 

$44.8

 

$12.3

 

$918.3

 

$10.3

 

$928.6

Operating income (loss)
248.7

 
(2.0
)
 
0.6

 
247.3

 
8.8

 
256.1

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
202.8

 
2.7

 
205.5

 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,350.5

 

$322.5

 

$33.2

 

$2,706.2

 

$61.4

 

$2,767.6

Operating income
543.0

 
47.7

 
4.2

 
594.9

 
21.9

 
616.8

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
422.6

 
23.1

 
445.7

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,296.2

 

$299.0

 

$36.2

 

$2,631.4

 

$29.6

 

$2,661.0

Operating income
510.2

 
34.9

 
2.9

 
548.0

 
25.0

 
573.0

Net income attributable to Alliant Energy common shareowners
 
 
 
 
 
 
395.0

 
31.8

 
426.8



IPL - Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
 
Electric
 
Gas
 
Other
 
Total
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$560.9

 

$24.8

 

$10.8

 

$596.5

Operating income (loss)
175.1

 
(4.2
)
 
2.6

 
173.5

Earnings available for common stock
 
 
 
 
 
 
141.1

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$509.2

 

$26.7

 

$11.7

 

$547.6

Operating income (loss)
144.7

 
(3.1
)
 
1.5

 
143.1

Earnings available for common stock
 
 
 
 
 
 
126.5

Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$1,373.0

 

$187.8

 

$32.0

 

$1,592.8

Operating income
290.8

 
26.3

 
4.4

 
321.5

Earnings available for common stock
 
 
 
 
 
 
239.4

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$1,337.0

 

$177.0

 

$34.2

 

$1,548.2

Operating income
275.7

 
16.3

 
4.4

 
296.4

Earnings available for common stock
 
 
 
 
 
 
224.9



WPL - Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
 
Electric
 
Gas
 
Other
 
Total
 
(in millions)
Three Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$355.0

 

$16.7

 

$0.4

 

$372.1

Operating income (loss)
108.6

 
(0.5
)
 
0.2

 
108.3

Earnings available for common stock
 
 
 
 
 
 
75.5

Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$352.0

 

$18.1

 

$0.6

 

$370.7

Operating income (loss)
104.0

 
1.1

 
(0.9
)
 
104.2

Earnings available for common stock
 
 
 
 
 
 
76.3

Nine Months Ended September 30, 2019
 
 
 
 
 
 
 
Revenues

$977.5

 

$134.7

 

$1.2

 

$1,113.4

Operating income (loss)
252.2

 
21.4

 
(0.2
)
 
273.4

Earnings available for common stock
 
 
 
 
 
 
183.2

Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues

$959.2

 

$122.0

 

$2.0

 

$1,083.2

Operating income (loss)
234.5

 
18.6

 
(1.5
)
 
251.6

Earnings available for common stock
 
 
 
 
 
 
170.1