(15) SEGMENTS OF BUSINESS

Alliant Energy - Alliant Energy's principal businesses as of Dec. 31, 2011 are:

•

Utility - includes the operations of IPL and WPL, which serve customers in Iowa, Wisconsin and Minnesota. The utility business has three reportable segments: a) utility electric operations; b) utility gas operations; and c) utility other, which includes steam operations, various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total Utility."

•

Non-regulated - RMT - includes the operations of RMT, a subsidiary of Resources. RMT provides renewable energy services to customers throughout the U.S. In February 2012, Alliant Energy announced plans to sell RMT in 2012.

•

Other Non-regulated, Parent and Other - includes the remaining operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. Additional Resources businesses include Transportation, Non-regulated Generation and other non-regulated investments described in Note 1(a).

Alliant Energy's administrative support services are directly charged to the applicable segment where practicable. In all other cases, administrative support services are allocated to the applicable segment based on services agreements. Intersegment revenues were not material to Alliant Energy's operations and there was no single customer whose revenues were 10% or more of Alliant Energy's consolidated revenues. Certain financial information relating to Alliant Energy's business segments, products and services and geographic information was as follows (in millions):

Utility

Non-
Regulated-
RMT (a)

Other
Non-
Regulated,
Parent and
Other

Alliant
Energy
Consolidated

Electric

Gas

Other

Total

2011

Operating revenues

$

2,635.8

$

476.7

$

62.0

$

3,174.5

$

443.9

$

46.9

$

3,665.3

Depreciation and amortization

289.0

28.4

1.8

319.2

2.8

1.8

323.8

Operating income (loss)

444.2

47.8

(3.2

)

488.8

(34.9

)

24.5

478.4

Interest expense, net of AFUDC

146.6

1.4

(1.7

)

146.3

Equity income from unconsolidated investments, net

(38.7

)

—

(38.7

)

—

(0.6

)

(39.3

)

Interest income and other

(0.2

)

(1.4

)

(2.7

)

(4.3

)

Income tax expense (benefit)

78.3

(14.1

)

(9.1

)

55.1

Income (loss) from continuing operations, net of tax

302.8

(20.8

)

38.6

320.6

Income from discontinued operations, net of tax

—

1.3

Net income (loss)

302.8

(20.8

)

39.9

321.9

Preferred dividends

18.3

—

18.3

Net income (loss) attributable to Alliant Energy common shareowners

284.5

(20.8

)

39.9

303.6

Total assets

7,524.5

831.9

781.1

9,137.5

126.3

424.1

9,687.9

Investments in equity method subsidiaries

246.5

—

246.5

—

3.1

249.6

Construction and acquisition expenditures

542.7

38.0

27.4

608.1

0.7

64.6

673.4


	Utility											Non- Regulated- RMT (a)			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
	Electric			Gas		Other			Total			Non- Regulated- RMT (a)			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
2010
Operating revenues	$	2,674.2		$	480.6	$	64.6		$	3,219.4		$	154.0		$	42.7		$	3,416.1
Depreciation and amortization		255.1			25.2		5.3			285.6			4.0			1.7			291.3
Operating income (loss)		489.8			53.4		(2.5	)		540.7			(3.9	)		19.3			556.1
Interest expense, net of AFUDC										142.8			0.2			2.0			145.0
Equity income from unconsolidated investments, net		(37.8	)		—		—			(37.8	)		—			(0.3	)		(38.1	)
Interest income and other										(0.6	)		0.6			(4.0	)		(4.0	)
Income tax expense (benefit)										140.6			(2.5	)		7.1			145.2
Income (loss) from continuing operations, net of tax										295.7			(2.2	)		14.5			308.0
Loss from discontinued operations, net of tax										—			—			(1.7	)		(1.7	)
Net income (loss)										295.7			(2.2	)		12.8			306.3
Preferred dividends										18.7			—			—			18.7
Net income (loss) attributable to Alliant Energy common shareowners										277.0			(2.2	)		12.8			287.6
Total assets		7,227.2			817.6		782.4			8,827.2			90.7			365.0			9,282.9
Investments in equity method subsidiaries		236.0			—		—			236.0			—			2.5			238.5
Construction and acquisition expenditures		729.1			39.9		64.3			833.3			1.4			32.2			866.9


	Utility											Non- Regulated- RMT			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
	Electric			Gas		Other			Total			Non- Regulated- RMT			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
2009
Operating revenues	$	2,475.9		$	525.3	$	92.9		$	3,094.1		$	294.1		$	39.1		$	3,427.3
Depreciation and amortization		233.5			25.8		8.9			268.2			2.4			3.0			273.6
Operating income (loss)		342.2			52.3		(5.8	)		388.7			(4.9	)		12.4			396.2
Interest expense, net of AFUDC										111.6			0.2			3.4			115.2
Loss on early extinguishment of debt										—			—			203.0			203.0
Equity (income) loss from unconsolidated investments, net		(37.0	)		—		—			(37.0	)		—			0.4			(36.6	)
Interest income and other										(1.2	)		(1.1	)		(2.6	)		(4.9	)
Income tax expense (benefit)										72.8			(2.5	)		(79.6	)		(9.3	)
Income (loss) from continuing operations, net of tax										242.5			(1.5	)		(112.2	)		128.8
Income from discontinued operations, net of tax										—			—			0.9			0.9
Net income (loss)										242.5			(1.5	)		(111.3	)		129.7
Preferred dividends										18.7			—			—			18.7
Net income (loss) attributable to Alliant Energy common shareowners										223.8			(1.5	)		(111.3	)		111.0
Total assets		6,867.6			803.1		902.9			8,573.6			63.6			398.8			9,036.0
Investments in equity method subsidiaries		227.1			—		—			227.1			—			2.1			229.2
Construction and acquisition expenditures		1,191.8			45.2		5.0			1,242.0			8.2			(47.6	)		1,202.6

(a)

RMT's operating revenues and expenses increased significantly in 2011 primarily due to increased demand for construction management services for large wind and solar projects. RMT's operating loss and net loss in 2011 was largely driven by losses associated with certain large solar projects as a result of issues with certain of its subcontractors engaged to complete the solar projects. Schedule delays, abandonment of work by the original subcontractor and the need to hire additional subcontractors to complete the work in a timely manner resulted in significant additional costs for RMT in 2011.

Products and Services - Alliant Energy's consolidated operating revenues by segment were as follows:


	2011			2010			2009
Utility electric operations		72	%		78	%		72	%
Utility gas operations		13	%		14	%		15	%
Utility other		2	%		2	%		3	%
Non-regulated - RMT		12	%		5	%		9	%
Other		1	%		1	%		1	%

		100	%		100	%		100	%

Geographic Information - At Dec. 31, 2011, 2010 and 2009, Alliant Energy's long-lived assets to be held and used in foreign countries were not material.

IPL - IPL is a utility serving customers in Iowa and Minnesota and includes three reportable segments: a) electric operations; b) gas operations; and c) other, which includes steam operations, various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total." Intersegment revenues were not material to IPL's operations and there was no single customer whose revenues were 10% or more of IPL's consolidated revenues. Certain financial information relating to IPL's business segments was as follows (in millions):

Electric

Gas

Other

Total

2011

Operating revenues

$

1,408.3

$

276.3

$

55.5

$

1,740.1

Depreciation and amortization

161.3

16.0

1.8

179.1

Operating income

181.6

20.6

6.2

208.4

Interest expense, net of AFUDC

72.9

Interest income and other

(0.2

)

Income tax benefit

(3.6

)

Net income

139.3

Preferred dividends

15.0

Earnings available for common stock

124.3

Total assets

4,208.2

471.1

414.2

5,093.5

Construction and acquisition expenditures

245.6

21.2

26.9

293.7


	Electric		Gas		Other			Total
2010
Operating revenues	$	1,464.3	$	274.3	$	57.2		$	1,795.8
Depreciation and amortization		157.1		14.6		5.3			177.0
Operating income (loss)		239.7		23.6		(1.4	)		261.9
Interest expense, net of AFUDC									76.7
Interest income and other									(0.5	)
Income taxes									42.3
Net income									143.4
Preferred dividends									15.4
Earnings available for common stock									128.0
Total assets		4,025.3		460.3		452.0			4,937.6
Construction and acquisition expenditures		298.8		20.0		64.0			382.8


	Electric		Gas		Other			Total
2009
Operating revenues	$	1,315.6	$	308.8	$	83.6		$	1,708.0
Depreciation and amortization		130.3		13.6		8.9			152.8
Operating income (loss)		196.8		27.7		(2.8	)		221.7
Interest expense, net of AFUDC									42.5
Interest income and other									(0.8	)
Income taxes									27.0
Net income									153.0
Preferred dividends									15.4
Earnings available for common stock									137.6
Total assets		3,976.6		461.4		454.2			4,892.2
Construction and acquisition expenditures		711.3		17.5		4.8			733.6

WPL - WPL is a utility serving customers in Wisconsin and includes three reportable segments: a) electric operations; b) gas operations; and c) other, which includes various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total." Intersegment revenues were not material to WPL's operations and there was no single customer whose revenues were 10% or more of WPL's consolidated revenues. Certain financial information relating to WPL's business segments was as follows (in millions)

Electric

Gas

Other

Total

2011

Operating revenues

$

1,227.5

$

200.4

$

6.5

$

1,434.4

Depreciation and amortization

127.7

12.4

—

140.1

Operating income (loss)

262.6

27.2

(9.4

)

280.4

Interest expense, net of AFUDC

73.7

Equity income from unconsolidated investments

(38.7

)

—

(38.7

)

Income taxes

81.9

Net income

163.5

Preferred dividends

3.3

Earnings available for common stock

160.2

Total assets

3,316.3

360.8

366.9

4,044.0

Investments in equity method subsidiaries

246.5

—

246.5

Construction and acquisition expenditures

297.1

16.8

0.5

314.4


	Electric			Gas		Other			Total
2010
Operating revenues	$	1,209.9		$	206.3	$	7.4		$	1,423.6
Depreciation and amortization		98.0			10.6		—			108.6
Operating income (loss)		250.1			29.8		(1.1	)		278.8
Interest expense, net of AFUDC										66.1
Equity income from unconsolidated investments		(37.8	)		—		—			(37.8	)
Interest income and other										(0.1	)
Income taxes										98.3
Net income										152.3
Preferred dividends										3.3
Earnings available for common stock										149.0
Total assets		3,201.9			357.3		330.4			3,889.6
Investments in equity method subsidiaries		236.0			—		—			236.0
Construction and acquisition expenditures		430.3			19.9		0.3			450.5


	Electric			Gas		Other			Total
2009
Operating revenues	$	1,160.3		$	216.5	$	9.3		$	1,386.1
Depreciation and amortization		103.2			12.2		—			115.4
Operating income (loss)		145.4			24.6		(3.0	)		167.0
Interest expense, net of AFUDC										69.1
Equity income from unconsolidated investments		(37.0	)		—		—			(37.0	)
Interest income and other										(0.4	)
Income taxes										45.8
Net income										89.5
Preferred dividends										3.3
Earnings available for common stock										86.2
Total assets		2,891.0			341.7		448.7			3,681.4
Investments in equity method subsidiaries		227.1			—		—			227.1
Construction and acquisition expenditures		480.5			27.7		0.2			508.4

Segments Of Business

(15) SEGMENTS OF BUSINESS

Alliant Energy - Alliant Energy's principal businesses as of Dec. 31, 2011 are:

•

Utility - includes the operations of IPL and WPL, which serve customers in Iowa, Wisconsin and Minnesota. The utility business has three reportable segments: a) utility electric operations; b) utility gas operations; and c) utility other, which includes steam operations, various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total Utility."

•

Non-regulated - RMT - includes the operations of RMT, a subsidiary of Resources. RMT provides renewable energy services to customers throughout the U.S. In February 2012, Alliant Energy announced plans to sell RMT in 2012.

•

Other Non-regulated, Parent and Other - includes the remaining operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. Additional Resources businesses include Transportation, Non-regulated Generation and other non-regulated investments described in Note 1(a).

Alliant Energy's administrative support services are directly charged to the applicable segment where practicable. In all other cases, administrative support services are allocated to the applicable segment based on services agreements. Intersegment revenues were not material to Alliant Energy's operations and there was no single customer whose revenues were 10% or more of Alliant Energy's consolidated revenues. Certain financial information relating to Alliant Energy's business segments, products and services and geographic information was as follows (in millions):

Utility

Non-
Regulated-
RMT (a)

Other
Non-
Regulated,
Parent and
Other

Alliant
Energy
Consolidated

Electric

Gas

Other

Total

2011

Operating revenues

$

2,635.8

$

476.7

$

62.0

$

3,174.5

$

443.9

$

46.9

$

3,665.3

Depreciation and amortization

289.0

28.4

1.8

319.2

2.8

1.8

323.8

Operating income (loss)

444.2

47.8

(3.2

)

488.8

(34.9

)

24.5

478.4

Interest expense, net of AFUDC

146.6

1.4

(1.7

)

146.3

Equity income from unconsolidated investments, net

(38.7

)

—

(38.7

)

—

(0.6

)

(39.3

)

Interest income and other

(0.2

)

(1.4

)

(2.7

)

(4.3

)

Income tax expense (benefit)

78.3

(14.1

)

(9.1

)

55.1

Income (loss) from continuing operations, net of tax

302.8

(20.8

)

38.6

320.6

Income from discontinued operations, net of tax

—

1.3

Net income (loss)

302.8

(20.8

)

39.9

321.9

Preferred dividends

18.3

—

18.3

Net income (loss) attributable to Alliant Energy common shareowners

284.5

(20.8

)

39.9

303.6

Total assets

7,524.5

831.9

781.1

9,137.5

126.3

424.1

9,687.9

Investments in equity method subsidiaries

246.5

—

246.5

—

3.1

249.6

Construction and acquisition expenditures

542.7

38.0

27.4

608.1

0.7

64.6

673.4


	Utility											Non- Regulated- RMT (a)			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
	Electric			Gas		Other			Total			Non- Regulated- RMT (a)			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
2010
Operating revenues	$	2,674.2		$	480.6	$	64.6		$	3,219.4		$	154.0		$	42.7		$	3,416.1
Depreciation and amortization		255.1			25.2		5.3			285.6			4.0			1.7			291.3
Operating income (loss)		489.8			53.4		(2.5	)		540.7			(3.9	)		19.3			556.1
Interest expense, net of AFUDC										142.8			0.2			2.0			145.0
Equity income from unconsolidated investments, net		(37.8	)		—		—			(37.8	)		—			(0.3	)		(38.1	)
Interest income and other										(0.6	)		0.6			(4.0	)		(4.0	)
Income tax expense (benefit)										140.6			(2.5	)		7.1			145.2
Income (loss) from continuing operations, net of tax										295.7			(2.2	)		14.5			308.0
Loss from discontinued operations, net of tax										—			—			(1.7	)		(1.7	)
Net income (loss)										295.7			(2.2	)		12.8			306.3
Preferred dividends										18.7			—			—			18.7
Net income (loss) attributable to Alliant Energy common shareowners										277.0			(2.2	)		12.8			287.6
Total assets		7,227.2			817.6		782.4			8,827.2			90.7			365.0			9,282.9
Investments in equity method subsidiaries		236.0			—		—			236.0			—			2.5			238.5
Construction and acquisition expenditures		729.1			39.9		64.3			833.3			1.4			32.2			866.9


	Utility											Non- Regulated- RMT			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
	Electric			Gas		Other			Total			Non- Regulated- RMT			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
2009
Operating revenues	$	2,475.9		$	525.3	$	92.9		$	3,094.1		$	294.1		$	39.1		$	3,427.3
Depreciation and amortization		233.5			25.8		8.9			268.2			2.4			3.0			273.6
Operating income (loss)		342.2			52.3		(5.8	)		388.7			(4.9	)		12.4			396.2
Interest expense, net of AFUDC										111.6			0.2			3.4			115.2
Loss on early extinguishment of debt										—			—			203.0			203.0
Equity (income) loss from unconsolidated investments, net		(37.0	)		—		—			(37.0	)		—			0.4			(36.6	)
Interest income and other										(1.2	)		(1.1	)		(2.6	)		(4.9	)
Income tax expense (benefit)										72.8			(2.5	)		(79.6	)		(9.3	)
Income (loss) from continuing operations, net of tax										242.5			(1.5	)		(112.2	)		128.8
Income from discontinued operations, net of tax										—			—			0.9			0.9
Net income (loss)										242.5			(1.5	)		(111.3	)		129.7
Preferred dividends										18.7			—			—			18.7
Net income (loss) attributable to Alliant Energy common shareowners										223.8			(1.5	)		(111.3	)		111.0
Total assets		6,867.6			803.1		902.9			8,573.6			63.6			398.8			9,036.0
Investments in equity method subsidiaries		227.1			—		—			227.1			—			2.1			229.2
Construction and acquisition expenditures		1,191.8			45.2		5.0			1,242.0			8.2			(47.6	)		1,202.6

(a)

RMT's operating revenues and expenses increased significantly in 2011 primarily due to increased demand for construction management services for large wind and solar projects. RMT's operating loss and net loss in 2011 was largely driven by losses associated with certain large solar projects as a result of issues with certain of its subcontractors engaged to complete the solar projects. Schedule delays, abandonment of work by the original subcontractor and the need to hire additional subcontractors to complete the work in a timely manner resulted in significant additional costs for RMT in 2011.

Products and Services - Alliant Energy's consolidated operating revenues by segment were as follows:


	2011			2010			2009
Utility electric operations		72	%		78	%		72	%
Utility gas operations		13	%		14	%		15	%
Utility other		2	%		2	%		3	%
Non-regulated - RMT		12	%		5	%		9	%
Other		1	%		1	%		1	%

		100	%		100	%		100	%

Geographic Information - At Dec. 31, 2011, 2010 and 2009, Alliant Energy's long-lived assets to be held and used in foreign countries were not material.

IPL - IPL is a utility serving customers in Iowa and Minnesota and includes three reportable segments: a) electric operations; b) gas operations; and c) other, which includes steam operations, various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total." Intersegment revenues were not material to IPL's operations and there was no single customer whose revenues were 10% or more of IPL's consolidated revenues. Certain financial information relating to IPL's business segments was as follows (in millions):

Electric

Gas

Other

Total

2011

Operating revenues

$

1,408.3

$

276.3

$

55.5

$

1,740.1

Depreciation and amortization

161.3

16.0

1.8

179.1

Operating income

181.6

20.6

6.2

208.4

Interest expense, net of AFUDC

72.9

Interest income and other

(0.2

)

Income tax benefit

(3.6

)

Net income

139.3

Preferred dividends

15.0

Earnings available for common stock

124.3

Total assets

4,208.2

471.1

414.2

5,093.5

Construction and acquisition expenditures

245.6

21.2

26.9

293.7


	Electric		Gas		Other			Total
2010
Operating revenues	$	1,464.3	$	274.3	$	57.2		$	1,795.8
Depreciation and amortization		157.1		14.6		5.3			177.0
Operating income (loss)		239.7		23.6		(1.4	)		261.9
Interest expense, net of AFUDC									76.7
Interest income and other									(0.5	)
Income taxes									42.3
Net income									143.4
Preferred dividends									15.4
Earnings available for common stock									128.0
Total assets		4,025.3		460.3		452.0			4,937.6
Construction and acquisition expenditures		298.8		20.0		64.0			382.8


	Electric		Gas		Other			Total
2009
Operating revenues	$	1,315.6	$	308.8	$	83.6		$	1,708.0
Depreciation and amortization		130.3		13.6		8.9			152.8
Operating income (loss)		196.8		27.7		(2.8	)		221.7
Interest expense, net of AFUDC									42.5
Interest income and other									(0.8	)
Income taxes									27.0
Net income									153.0
Preferred dividends									15.4
Earnings available for common stock									137.6
Total assets		3,976.6		461.4		454.2			4,892.2
Construction and acquisition expenditures		711.3		17.5		4.8			733.6

WPL - WPL is a utility serving customers in Wisconsin and includes three reportable segments: a) electric operations; b) gas operations; and c) other, which includes various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total." Intersegment revenues were not material to WPL's operations and there was no single customer whose revenues were 10% or more of WPL's consolidated revenues. Certain financial information relating to WPL's business segments was as follows (in millions):

Electric

Gas

Other

Total

2011

Operating revenues

$

1,227.5

$

200.4

$

6.5

$

1,434.4

Depreciation and amortization

127.7

12.4

—

140.1

Operating income (loss)

262.6

27.2

(9.4

)

280.4

Interest expense, net of AFUDC

73.7

Equity income from unconsolidated investments

(38.7

)

—

(38.7

)

Income taxes

81.9

Net income

163.5

Preferred dividends

3.3

Earnings available for common stock

160.2

Total assets

3,316.3

360.8

366.9

4,044.0

Investments in equity method subsidiaries

246.5

—

246.5

Construction and acquisition expenditures

297.1

16.8

0.5

314.4


	Electric			Gas		Other			Total
2010
Operating revenues	$	1,209.9		$	206.3	$	7.4		$	1,423.6
Depreciation and amortization		98.0			10.6		—			108.6
Operating income (loss)		250.1			29.8		(1.1	)		278.8
Interest expense, net of AFUDC										66.1
Equity income from unconsolidated investments		(37.8	)		—		—			(37.8	)
Interest income and other										(0.1	)
Income taxes										98.3
Net income										152.3
Preferred dividends										3.3
Earnings available for common stock										149.0
Total assets		3,201.9			357.3		330.4			3,889.6
Investments in equity method subsidiaries		236.0			—		—			236.0
Construction and acquisition expenditures		430.3			19.9		0.3			450.5


	Electric			Gas		Other			Total
2009
Operating revenues	$	1,160.3		$	216.5	$	9.3		$	1,386.1
Depreciation and amortization		103.2			12.2		—			115.4
Operating income (loss)		145.4			24.6		(3.0	)		167.0
Interest expense, net of AFUDC										69.1
Equity income from unconsolidated investments		(37.0	)		—		—			(37.0	)
Interest income and other										(0.4	)
Income taxes										45.8
Net income										89.5
Preferred dividends										3.3
Earnings available for common stock										86.2
Total assets		2,891.0			341.7		448.7			3,681.4
Investments in equity method subsidiaries		227.1			—		—			227.1
Construction and acquisition expenditures		480.5			27.7		0.2			508.4

Segments Of Business

(15) SEGMENTS OF BUSINESS

Alliant Energy - Alliant Energy's principal businesses as of Dec. 31, 2011 are:

•

Utility - includes the operations of IPL and WPL, which serve customers in Iowa, Wisconsin and Minnesota. The utility business has three reportable segments: a) utility electric operations; b) utility gas operations; and c) utility other, which includes steam operations, various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total Utility."

•

Non-regulated - RMT - includes the operations of RMT, a subsidiary of Resources. RMT provides renewable energy services to customers throughout the U.S. In February 2012, Alliant Energy announced plans to sell RMT in 2012.

•

Other Non-regulated, Parent and Other - includes the remaining operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. Additional Resources businesses include Transportation, Non-regulated Generation and other non-regulated investments described in Note 1(a).

Alliant Energy's administrative support services are directly charged to the applicable segment where practicable. In all other cases, administrative support services are allocated to the applicable segment based on services agreements. Intersegment revenues were not material to Alliant Energy's operations and there was no single customer whose revenues were 10% or more of Alliant Energy's consolidated revenues. Certain financial information relating to Alliant Energy's business segments, products and services and geographic information was as follows (in millions):

Utility

Non-
Regulated-
RMT (a)

Other
Non-
Regulated,
Parent and
Other

Alliant
Energy
Consolidated

Electric

Gas

Other

Total

2011

Operating revenues

$

2,635.8

$

476.7

$

62.0

$

3,174.5

$

443.9

$

46.9

$

3,665.3

Depreciation and amortization

289.0

28.4

1.8

319.2

2.8

1.8

323.8

Operating income (loss)

444.2

47.8

(3.2

)

488.8

(34.9

)

24.5

478.4

Interest expense, net of AFUDC

146.6

1.4

(1.7

)

146.3

Equity income from unconsolidated investments, net

(38.7

)

—

(38.7

)

—

(0.6

)

(39.3

)

Interest income and other

(0.2

)

(1.4

)

(2.7

)

(4.3

)

Income tax expense (benefit)

78.3

(14.1

)

(9.1

)

55.1

Income (loss) from continuing operations, net of tax

302.8

(20.8

)

38.6

320.6

Income from discontinued operations, net of tax

—

1.3

Net income (loss)

302.8

(20.8

)

39.9

321.9

Preferred dividends

18.3

—

18.3

Net income (loss) attributable to Alliant Energy common shareowners

284.5

(20.8

)

39.9

303.6

Total assets

7,524.5

831.9

781.1

9,137.5

126.3

424.1

9,687.9

Investments in equity method subsidiaries

246.5

—

246.5

—

3.1

249.6

Construction and acquisition expenditures

542.7

38.0

27.4

608.1

0.7

64.6

673.4


	Utility											Non- Regulated- RMT (a)			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
	Electric			Gas		Other			Total			Non- Regulated- RMT (a)			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
2010
Operating revenues	$	2,674.2		$	480.6	$	64.6		$	3,219.4		$	154.0		$	42.7		$	3,416.1
Depreciation and amortization		255.1			25.2		5.3			285.6			4.0			1.7			291.3
Operating income (loss)		489.8			53.4		(2.5	)		540.7			(3.9	)		19.3			556.1
Interest expense, net of AFUDC										142.8			0.2			2.0			145.0
Equity income from unconsolidated investments, net		(37.8	)		—		—			(37.8	)		—			(0.3	)		(38.1	)
Interest income and other										(0.6	)		0.6			(4.0	)		(4.0	)
Income tax expense (benefit)										140.6			(2.5	)		7.1			145.2
Income (loss) from continuing operations, net of tax										295.7			(2.2	)		14.5			308.0
Loss from discontinued operations, net of tax										—			—			(1.7	)		(1.7	)
Net income (loss)										295.7			(2.2	)		12.8			306.3
Preferred dividends										18.7			—			—			18.7
Net income (loss) attributable to Alliant Energy common shareowners										277.0			(2.2	)		12.8			287.6
Total assets		7,227.2			817.6		782.4			8,827.2			90.7			365.0			9,282.9
Investments in equity method subsidiaries		236.0			—		—			236.0			—			2.5			238.5
Construction and acquisition expenditures		729.1			39.9		64.3			833.3			1.4			32.2			866.9


	Utility											Non- Regulated- RMT			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
	Electric			Gas		Other			Total			Non- Regulated- RMT			Other Non- Regulated, Parent and Other			Alliant Energy Consolidated
2009
Operating revenues	$	2,475.9		$	525.3	$	92.9		$	3,094.1		$	294.1		$	39.1		$	3,427.3
Depreciation and amortization		233.5			25.8		8.9			268.2			2.4			3.0			273.6
Operating income (loss)		342.2			52.3		(5.8	)		388.7			(4.9	)		12.4			396.2
Interest expense, net of AFUDC										111.6			0.2			3.4			115.2
Loss on early extinguishment of debt										—			—			203.0			203.0
Equity (income) loss from unconsolidated investments, net		(37.0	)		—		—			(37.0	)		—			0.4			(36.6	)
Interest income and other										(1.2	)		(1.1	)		(2.6	)		(4.9	)
Income tax expense (benefit)										72.8			(2.5	)		(79.6	)		(9.3	)
Income (loss) from continuing operations, net of tax										242.5			(1.5	)		(112.2	)		128.8
Income from discontinued operations, net of tax										—			—			0.9			0.9
Net income (loss)										242.5			(1.5	)		(111.3	)		129.7
Preferred dividends										18.7			—			—			18.7
Net income (loss) attributable to Alliant Energy common shareowners										223.8			(1.5	)		(111.3	)		111.0
Total assets		6,867.6			803.1		902.9			8,573.6			63.6			398.8			9,036.0
Investments in equity method subsidiaries		227.1			—		—			227.1			—			2.1			229.2
Construction and acquisition expenditures		1,191.8			45.2		5.0			1,242.0			8.2			(47.6	)		1,202.6

(a)

RMT's operating revenues and expenses increased significantly in 2011 primarily due to increased demand for construction management services for large wind and solar projects. RMT's operating loss and net loss in 2011 was largely driven by losses associated with certain large solar projects as a result of issues with certain of its subcontractors engaged to complete the solar projects. Schedule delays, abandonment of work by the original subcontractor and the need to hire additional subcontractors to complete the work in a timely manner resulted in significant additional costs for RMT in 2011.

Products and Services - Alliant Energy's consolidated operating revenues by segment were as follows:


	2011			2010			2009
Utility electric operations		72	%		78	%		72	%
Utility gas operations		13	%		14	%		15	%
Utility other		2	%		2	%		3	%
Non-regulated - RMT		12	%		5	%		9	%
Other		1	%		1	%		1	%

		100	%		100	%		100	%

Geographic Information - At Dec. 31, 2011, 2010 and 2009, Alliant Energy's long-lived assets to be held and used in foreign countries were not material.

IPL - IPL is a utility serving customers in Iowa and Minnesota and includes three reportable segments: a) electric operations; b) gas operations; and c) other, which includes steam operations, various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total." Intersegment revenues were not material to IPL's operations and there was no single customer whose revenues were 10% or more of IPL's consolidated revenues. Certain financial information relating to IPL's business segments was as follows (in millions):

Electric

Gas

Other

Total

2011

Operating revenues

$

1,408.3

$

276.3

$

55.5

$

1,740.1

Depreciation and amortization

161.3

16.0

1.8

179.1

Operating income

181.6

20.6

6.2

208.4

Interest expense, net of AFUDC

72.9

Interest income and other

(0.2

)

Income tax benefit

(3.6

)

Net income

139.3

Preferred dividends

15.0

Earnings available for common stock

124.3

Total assets

4,208.2

471.1

414.2

5,093.5

Construction and acquisition expenditures

245.6

21.2

26.9

293.7


	Electric		Gas		Other			Total
2010
Operating revenues	$	1,464.3	$	274.3	$	57.2		$	1,795.8
Depreciation and amortization		157.1		14.6		5.3			177.0
Operating income (loss)		239.7		23.6		(1.4	)		261.9
Interest expense, net of AFUDC									76.7
Interest income and other									(0.5	)
Income taxes									42.3
Net income									143.4
Preferred dividends									15.4
Earnings available for common stock									128.0
Total assets		4,025.3		460.3		452.0			4,937.6
Construction and acquisition expenditures		298.8		20.0		64.0			382.8


	Electric		Gas		Other			Total
2009
Operating revenues	$	1,315.6	$	308.8	$	83.6		$	1,708.0
Depreciation and amortization		130.3		13.6		8.9			152.8
Operating income (loss)		196.8		27.7		(2.8	)		221.7
Interest expense, net of AFUDC									42.5
Interest income and other									(0.8	)
Income taxes									27.0
Net income									153.0
Preferred dividends									15.4
Earnings available for common stock									137.6
Total assets		3,976.6		461.4		454.2			4,892.2
Construction and acquisition expenditures		711.3		17.5		4.8			733.6

WPL - WPL is a utility serving customers in Wisconsin and includes three reportable segments: a) electric operations; b) gas operations; and c) other, which includes various other energy-related products and services and the unallocated portions of the utility business. Various line items in the following tables are not allocated to the electric and gas segments for management reporting purposes and therefore are included only in "Total." Intersegment revenues were not material to WPL's operations and there was no single customer whose revenues were 10% or more of WPL's consolidated revenues. Certain financial information relating to WPL's business segments was as follows (in millions):

Electric

Gas

Other

Total

2011

Operating revenues

$

1,227.5

$

200.4

$

6.5

$

1,434.4

Depreciation and amortization

127.7

12.4

—

140.1

Operating income (loss)

262.6

27.2

(9.4

)

280.4

Interest expense, net of AFUDC

73.7

Equity income from unconsolidated investments

(38.7

)

—

(38.7

)

Income taxes

81.9

Net income

163.5

Preferred dividends

3.3

Earnings available for common stock

160.2

Total assets

3,316.3

360.8

366.9

4,044.0

Investments in equity method subsidiaries

246.5

—

246.5

Construction and acquisition expenditures

297.1

16.8

0.5

314.4


	Electric			Gas		Other			Total
2010
Operating revenues	$	1,209.9		$	206.3	$	7.4		$	1,423.6
Depreciation and amortization		98.0			10.6		—			108.6
Operating income (loss)		250.1			29.8		(1.1	)		278.8
Interest expense, net of AFUDC										66.1
Equity income from unconsolidated investments		(37.8	)		—		—			(37.8	)
Interest income and other										(0.1	)
Income taxes										98.3
Net income										152.3
Preferred dividends										3.3
Earnings available for common stock										149.0
Total assets		3,201.9			357.3		330.4			3,889.6
Investments in equity method subsidiaries		236.0			—		—			236.0
Construction and acquisition expenditures		430.3			19.9		0.3			450.5


	Electric			Gas		Other			Total
2009
Operating revenues	$	1,160.3		$	216.5	$	9.3		$	1,386.1
Depreciation and amortization		103.2			12.2		—			115.4
Operating income (loss)		145.4			24.6		(3.0	)		167.0
Interest expense, net of AFUDC										69.1
Equity income from unconsolidated investments		(37.0	)		—		—			(37.0	)
Interest income and other										(0.4	)
Income taxes										45.8
Net income										89.5
Preferred dividends										3.3
Earnings available for common stock										86.2
Total assets		2,891.0			341.7		448.7			3,681.4
Investments in equity method subsidiaries		227.1			—		—			227.1
Construction and acquisition expenditures		480.5			27.7		0.2			508.4