XML 40 R19.htm IDEA: XBRL DOCUMENT v3.10.0.1
Segments Of Business
 9 Months Ended
Sep. 30, 2018
Segment Reporting Information [Line Items]  
Segments Of Business
SEGMENTS OF BUSINESS
In the fourth quarter of 2017, Alliant Energy and WPL modified the segment reporting related to ATC Holdings, consistent with information used by their chief operating decision maker to evaluate performance and allocate resources. As of December 31, 2017, ATC Holdings are no longer included in Alliant Energy’s utility electric operations reportable segment or WPL’s electric operations reportable segment. As a result, all prior period amounts impacted by this change were reclassified to conform to the new presentation. Alliant Energy’s related amounts were reclassified from “Electric Utility” to “ATC Holdings, Non-Utility, Parent and Other” in the table below. There was no resulting change to WPL’s segment reporting for the three and nine months ended September 30, 2017.

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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
Revenues

$840.6

 

$45.8

 

$11.2

 

$897.6

 

$9.3

 

$906.9

Operating income (loss)
236.7

 
(1.7
)
 
(7.7
)
 
227.3

 
9.0

 
236.3

Net income (loss) attributable to Alliant Energy common shareowners
 
 
 
 
 
 
170.2

 
(1.4
)
 
168.8

 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,199.1

 

$262.7

 

$34.4

 

$2,496.2

 

$29.9

 

$2,526.1

Operating income (loss)
486.9

 
31.3

 
(6.7
)
 
511.5

 
25.7

 
537.2

Amounts attributable to Alliant Energy common shareowners:
 
 
 
 
 
 
 
 
 
 
 
Income from continuing operations, net of tax
 
 
 
 
 
 
333.8

 
28.3

 
362.1

Income from discontinued operations, net of tax
 
 
 
 
 
 
—

 
1.4

 
1.4

Net income
 
 
 
 
 
 
333.8

 
29.7

 
363.5



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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$489.0

 

$27.4

 

$11.0

 

$527.4

Operating income (loss)
140.0

 
(1.8
)
 
(4.4
)
 
133.8

Earnings available for common stock
 
 
 
 
 
 
120.4

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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$1,217.6

 

$147.2

 

$33.3

 

$1,398.1

Operating income (loss)
239.2

 
15.4

 
(1.4
)
 
253.2

Earnings available for common stock
 
 
 
 
 
 
200.4



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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$351.6

 

$18.4

 

$0.2

 

$370.2

Operating income (loss)
96.7

 
0.1

 
(3.3
)
 
93.5

Earnings available for common stock
 
 
 
 
 
 
49.8

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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$981.5

 

$115.5

 

$1.1

 

$1,098.1

Operating income (loss)
247.7

 
15.9

 
(5.3
)
 
258.3

Earnings available for common stock
 
 
 
 
 
 
133.4
IPL [Member]  
Segment Reporting Information [Line Items]  
Segments Of Business
SEGMENTS OF BUSINESS
In the fourth quarter of 2017, Alliant Energy and WPL modified the segment reporting related to ATC Holdings, consistent with information used by their chief operating decision maker to evaluate performance and allocate resources. As of December 31, 2017, ATC Holdings are no longer included in Alliant Energy’s utility electric operations reportable segment or WPL’s electric operations reportable segment. As a result, all prior period amounts impacted by this change were reclassified to conform to the new presentation. Alliant Energy’s related amounts were reclassified from “Electric Utility” to “ATC Holdings, Non-Utility, Parent and Other” in the table below. There was no resulting change to WPL’s segment reporting for the three and nine months ended September 30, 2017.

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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
Revenues

$840.6

 

$45.8

 

$11.2

 

$897.6

 

$9.3

 

$906.9

Operating income (loss)
236.7

 
(1.7
)
 
(7.7
)
 
227.3

 
9.0

 
236.3

Net income (loss) attributable to Alliant Energy common shareowners
 
 
 
 
 
 
170.2

 
(1.4
)
 
168.8

 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,199.1

 

$262.7

 

$34.4

 

$2,496.2

 

$29.9

 

$2,526.1

Operating income (loss)
486.9

 
31.3

 
(6.7
)
 
511.5

 
25.7

 
537.2

Amounts attributable to Alliant Energy common shareowners:
 
 
 
 
 
 
 
 
 
 
 
Income from continuing operations, net of tax
 
 
 
 
 
 
333.8

 
28.3

 
362.1

Income from discontinued operations, net of tax
 
 
 
 
 
 
—

 
1.4

 
1.4

Net income
 
 
 
 
 
 
333.8

 
29.7

 
363.5



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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$489.0

 

$27.4

 

$11.0

 

$527.4

Operating income (loss)
140.0

 
(1.8
)
 
(4.4
)
 
133.8

Earnings available for common stock
 
 
 
 
 
 
120.4

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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$1,217.6

 

$147.2

 

$33.3

 

$1,398.1

Operating income (loss)
239.2

 
15.4

 
(1.4
)
 
253.2

Earnings available for common stock
 
 
 
 
 
 
200.4



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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$351.6

 

$18.4

 

$0.2

 

$370.2

Operating income (loss)
96.7

 
0.1

 
(3.3
)
 
93.5

Earnings available for common stock
 
 
 
 
 
 
49.8

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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$981.5

 

$115.5

 

$1.1

 

$1,098.1

Operating income (loss)
247.7

 
15.9

 
(5.3
)
 
258.3

Earnings available for common stock
 
 
 
 
 
 
133.4
WPL [Member]  
Segment Reporting Information [Line Items]  
Segments Of Business
SEGMENTS OF BUSINESS
In the fourth quarter of 2017, Alliant Energy and WPL modified the segment reporting related to ATC Holdings, consistent with information used by their chief operating decision maker to evaluate performance and allocate resources. As of December 31, 2017, ATC Holdings are no longer included in Alliant Energy’s utility electric operations reportable segment or WPL’s electric operations reportable segment. As a result, all prior period amounts impacted by this change were reclassified to conform to the new presentation. Alliant Energy’s related amounts were reclassified from “Electric Utility” to “ATC Holdings, Non-Utility, Parent and Other” in the table below. There was no resulting change to WPL’s segment reporting for the three and nine months ended September 30, 2017.

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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
Revenues

$840.6

 

$45.8

 

$11.2

 

$897.6

 

$9.3

 

$906.9

Operating income (loss)
236.7

 
(1.7
)
 
(7.7
)
 
227.3

 
9.0

 
236.3

Net income (loss) attributable to Alliant Energy common shareowners
 
 
 
 
 
 
170.2

 
(1.4
)
 
168.8

 
 
 
 
 
 
 
 
 
ATC Holdings,
 
Alliant
 
Utility
 
Non-Utility,
 
Energy
 
Electric
 
Gas
 
Other
 
Total
 
Parent and Other
 
Consolidated
 
(in millions)
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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
 
 
 
 
Revenues

$2,199.1

 

$262.7

 

$34.4

 

$2,496.2

 

$29.9

 

$2,526.1

Operating income (loss)
486.9

 
31.3

 
(6.7
)
 
511.5

 
25.7

 
537.2

Amounts attributable to Alliant Energy common shareowners:
 
 
 
 
 
 
 
 
 
 
 
Income from continuing operations, net of tax
 
 
 
 
 
 
333.8

 
28.3

 
362.1

Income from discontinued operations, net of tax
 
 
 
 
 
 
—

 
1.4

 
1.4

Net income
 
 
 
 
 
 
333.8

 
29.7

 
363.5



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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$489.0

 

$27.4

 

$11.0

 

$527.4

Operating income (loss)
140.0

 
(1.8
)
 
(4.4
)
 
133.8

Earnings available for common stock
 
 
 
 
 
 
120.4

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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$1,217.6

 

$147.2

 

$33.3

 

$1,398.1

Operating income (loss)
239.2

 
15.4

 
(1.4
)
 
253.2

Earnings available for common stock
 
 
 
 
 
 
200.4



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, 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

Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$351.6

 

$18.4

 

$0.2

 

$370.2

Operating income (loss)
96.7

 
0.1

 
(3.3
)
 
93.5

Earnings available for common stock
 
 
 
 
 
 
49.8

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

Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues

$981.5

 

$115.5

 

$1.1

 

$1,098.1

Operating income (loss)
247.7

 
15.9

 
(5.3
)
 
258.3

Earnings available for common stock
 
 
 
 
 
 
133.4