Segments Of Business

12 Months Ended

Dec. 31, 2012

Segment Reporting Information [Line Items]

Segments Of Business

SEGMENTS OF BUSINESS

Alliant Energy - Alliant Energy’s principal businesses as of December 31, 2012 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, Parent and Other - includes the operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. 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,			Alliant Energy
2012	Electric			Gas		Other		Total			Parent and Other			Consolidated
Operating revenues		$2,589.3			$396.3		$56.7		$3,042.3			$52.2			$3,094.5
Depreciation and amortization	299.3			29.1		1.4		329.8			2.6			332.4
Operating income	426.2			51.5		7.4		485.1			34.6			519.7
Interest expense, net of AFUDC								136.8			(2.0		)	134.8
Equity (income) loss from unconsolidated investments, net	(42.1		)	—		—		(42.1		)	0.8			(41.3		)
Interest income and other								(0.3		)	(3.7		)	(4.0		)
Income taxes								74.8			14.6			89.4
Income from continuing operations, net of tax								315.9			24.9			340.8
Loss from discontinued operations, net of tax								—			(5.1		)	(5.1		)
Net income								315.9			19.8			335.7
Preferred dividends								15.9			—			15.9
Net income attributable to Alliant Energy common shareowners								300.0			19.8			319.8
Total assets	8,438.8			814.8		966.0		10,219.6			565.9			10,785.5
Investments in equity method subsidiaries	264.3			—		—		264.3			2.3			266.6
Construction and acquisition expenditures	994.0			31.4		0.1		1,025.5			132.6			1,158.1

	Utility											Non-Regulated,			Alliant Energy
2011	Electric			Gas		Other			Total			Parent and Other			Consolidated
Operating revenues		$2,635.8			$476.7		$62.0			$3,174.5			$46.9			$3,221.4
Depreciation and amortization	289.0			28.4		1.8			319.2			1.8			321.0
Operating income (loss)	444.2			47.8		(3.2		)	488.8			24.5			513.3
Interest expense, net of AFUDC									146.6			(0.3		)	146.3
Equity income from unconsolidated investments, net	(38.7		)	—		—			(38.7		)	(0.6		)	(39.3		)
Interest income and other									(0.2		)	(4.1		)	(4.3		)
Income tax expense (benefit)									78.3			(9.1		)	69.2
Income from continuing operations, net of tax									302.8			38.6			341.4
Loss from discontinued operations, net of tax									—			(19.5		)	(19.5		)
Net income									302.8			19.1			321.9
Preferred dividends									18.3			—			18.3
Net income attributable to Alliant Energy common shareowners									284.5			19.1			303.6
Total assets	7,524.5			831.9		781.1			9,137.5			550.4			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			65.3			673.4

	Utility											Non-Regulated,			Alliant Energy
2010	Electric			Gas		Other			Total			Parent and Other			Consolidated
Operating revenues		$2,674.2			$480.6		$64.6			$3,219.4			$42.7			$3,262.1
Depreciation and amortization	255.1			25.2		5.3			285.6			1.7			287.3
Operating income (loss)	489.8			53.4		(2.5		)	540.7			19.3			560.0
Interest expense, net of AFUDC									142.8			2.0			144.8
Equity income from unconsolidated investments, net	(37.8		)	—		—			(37.8		)	(0.3		)	(38.1		)
Interest income and other									(0.6		)	(4.0		)	(4.6		)
Income taxes									140.6			7.1			147.7
Income from continuing operations, net of tax									295.7			14.5			310.2
Loss from discontinued operations, net of tax									—			(3.9		)	(3.9		)
Net income									295.7			10.6			306.3
Preferred dividends									18.7			—			18.7
Net income attributable to Alliant Energy common shareowners									277.0			10.6			287.6
Total assets	7,227.2			817.6		782.4			8,827.2			455.7			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			33.6			866.9

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

	2012		2011		2010
Utility electric operations	84	%	82	%	82	%
Utility gas operations	13	%	15	%	15	%
Utility other	2	%	2	%	2	%
Other	1	%	1	%	1	%
	100	%	100	%	100	%

Geographic Information - At December 31, 2012, 2011 and 2010, Alliant Energy did not have any long-lived assets to be held and used in foreign countries.

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):

2012	Electric		Gas		Other		Total
Operating revenues		$1,371.1		$226.7		$52.5		$1,650.3
Depreciation and amortization	171.2		16.3		1.4		188.9
Operating income	166.2		24.2		9.9		200.3
Interest expense, net of AFUDC							70.1
Interest income and other							(0.2		)
Income tax benefit							(19.8		)
Net income							150.2
Preferred dividends							12.6
Earnings available for common stock							137.6
Total assets	4,500.9		479.5		476.6		5,457.0
Construction and acquisition expenditures	291.0		16.4		0.1		307.5

2011	Electric		Gas		Other		Total
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

2010	Electric		Gas		Other			Total
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

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):

2012	Electric			Gas		Other			Total
Operating revenues		$1,218.2			$169.6		$4.2			$1,392.0
Depreciation and amortization	128.1			12.8		—			140.9
Operating income (loss)	260.0			27.3		(2.5		)	284.8
Interest expense, net of AFUDC									66.7
Equity income from unconsolidated investments	(42.1		)	—		—			(42.1		)
Interest income and other									(0.1		)
Income taxes									94.6
Net income									165.7
Preferred dividends									3.3
Earnings available for common stock									162.4
Total assets	3,937.9			335.3		489.4			4,762.6
Investments in equity method subsidiaries	264.3			—		—			264.3
Construction and acquisition expenditures	703.0			15.0		—			718.0

2011	Electric	Gas		Other		Total
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

2010	Electric	Gas		Other		Total
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

IPL [Member]

Segment Reporting Information [Line Items]

Segments Of Business

SEGMENTS OF BUSINESS

Alliant Energy - Alliant Energy’s principal businesses as of December 31, 2012 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, Parent and Other - includes the operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. 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,			Alliant Energy
2012	Electric			Gas		Other		Total			Parent and Other			Consolidated
Operating revenues		$2,589.3			$396.3		$56.7		$3,042.3			$52.2			$3,094.5
Depreciation and amortization	299.3			29.1		1.4		329.8			2.6			332.4
Operating income	426.2			51.5		7.4		485.1			34.6			519.7
Interest expense, net of AFUDC								136.8			(2.0		)	134.8
Equity (income) loss from unconsolidated investments, net	(42.1		)	—		—		(42.1		)	0.8			(41.3		)
Interest income and other								(0.3		)	(3.7		)	(4.0		)
Income taxes								74.8			14.6			89.4
Income from continuing operations, net of tax								315.9			24.9			340.8
Loss from discontinued operations, net of tax								—			(5.1		)	(5.1		)
Net income								315.9			19.8			335.7
Preferred dividends								15.9			—			15.9
Net income attributable to Alliant Energy common shareowners								300.0			19.8			319.8
Total assets	8,438.8			814.8		966.0		10,219.6			565.9			10,785.5
Investments in equity method subsidiaries	264.3			—		—		264.3			2.3			266.6
Construction and acquisition expenditures	994.0			31.4		0.1		1,025.5			132.6			1,158.1

	Utility											Non-Regulated,			Alliant Energy
2011	Electric			Gas		Other			Total			Parent and Other			Consolidated
Operating revenues		$2,635.8			$476.7		$62.0			$3,174.5			$46.9			$3,221.4
Depreciation and amortization	289.0			28.4		1.8			319.2			1.8			321.0
Operating income (loss)	444.2			47.8		(3.2		)	488.8			24.5			513.3
Interest expense, net of AFUDC									146.6			(0.3		)	146.3
Equity income from unconsolidated investments, net	(38.7		)	—		—			(38.7		)	(0.6		)	(39.3		)
Interest income and other									(0.2		)	(4.1		)	(4.3		)
Income tax expense (benefit)									78.3			(9.1		)	69.2
Income from continuing operations, net of tax									302.8			38.6			341.4
Loss from discontinued operations, net of tax									—			(19.5		)	(19.5		)
Net income									302.8			19.1			321.9
Preferred dividends									18.3			—			18.3
Net income attributable to Alliant Energy common shareowners									284.5			19.1			303.6
Total assets	7,524.5			831.9		781.1			9,137.5			550.4			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			65.3			673.4

	Utility											Non-Regulated,			Alliant Energy
2010	Electric			Gas		Other			Total			Parent and Other			Consolidated
Operating revenues		$2,674.2			$480.6		$64.6			$3,219.4			$42.7			$3,262.1
Depreciation and amortization	255.1			25.2		5.3			285.6			1.7			287.3
Operating income (loss)	489.8			53.4		(2.5		)	540.7			19.3			560.0
Interest expense, net of AFUDC									142.8			2.0			144.8
Equity income from unconsolidated investments, net	(37.8		)	—		—			(37.8		)	(0.3		)	(38.1		)
Interest income and other									(0.6		)	(4.0		)	(4.6		)
Income taxes									140.6			7.1			147.7
Income from continuing operations, net of tax									295.7			14.5			310.2
Loss from discontinued operations, net of tax									—			(3.9		)	(3.9		)
Net income									295.7			10.6			306.3
Preferred dividends									18.7			—			18.7
Net income attributable to Alliant Energy common shareowners									277.0			10.6			287.6
Total assets	7,227.2			817.6		782.4			8,827.2			455.7			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			33.6			866.9

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

	2012		2011		2010
Utility electric operations	84	%	82	%	82	%
Utility gas operations	13	%	15	%	15	%
Utility other	2	%	2	%	2	%
Other	1	%	1	%	1	%
	100	%	100	%	100	%

Geographic Information - At December 31, 2012, 2011 and 2010, Alliant Energy did not have any long-lived assets to be held and used in foreign countries.

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):

2012	Electric		Gas		Other		Total
Operating revenues		$1,371.1		$226.7		$52.5		$1,650.3
Depreciation and amortization	171.2		16.3		1.4		188.9
Operating income	166.2		24.2		9.9		200.3
Interest expense, net of AFUDC							70.1
Interest income and other							(0.2		)
Income tax benefit							(19.8		)
Net income							150.2
Preferred dividends							12.6
Earnings available for common stock							137.6
Total assets	4,500.9		479.5		476.6		5,457.0
Construction and acquisition expenditures	291.0		16.4		0.1		307.5

2011	Electric		Gas		Other		Total
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

2010	Electric		Gas		Other			Total
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

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):

2012	Electric			Gas		Other			Total
Operating revenues		$1,218.2			$169.6		$4.2			$1,392.0
Depreciation and amortization	128.1			12.8		—			140.9
Operating income (loss)	260.0			27.3		(2.5		)	284.8
Interest expense, net of AFUDC									66.7
Equity income from unconsolidated investments	(42.1		)	—		—			(42.1		)
Interest income and other									(0.1		)
Income taxes									94.6
Net income									165.7
Preferred dividends									3.3
Earnings available for common stock									162.4
Total assets	3,937.9			335.3		489.4			4,762.6
Investments in equity method subsidiaries	264.3			—		—			264.3
Construction and acquisition expenditures	703.0			15.0		—			718.0

2011	Electric	Gas		Other		Total
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

2010	Electric	Gas		Other		Total
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

WPL [Member]

Segment Reporting Information [Line Items]

Segments Of Business

SEGMENTS OF BUSINESS

Alliant Energy - Alliant Energy’s principal businesses as of December 31, 2012 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, Parent and Other - includes the operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. 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,			Alliant Energy
2012	Electric			Gas		Other		Total			Parent and Other			Consolidated
Operating revenues		$2,589.3			$396.3		$56.7		$3,042.3			$52.2			$3,094.5
Depreciation and amortization	299.3			29.1		1.4		329.8			2.6			332.4
Operating income	426.2			51.5		7.4		485.1			34.6			519.7
Interest expense, net of AFUDC								136.8			(2.0		)	134.8
Equity (income) loss from unconsolidated investments, net	(42.1		)	—		—		(42.1		)	0.8			(41.3		)
Interest income and other								(0.3		)	(3.7		)	(4.0		)
Income taxes								74.8			14.6			89.4
Income from continuing operations, net of tax								315.9			24.9			340.8
Loss from discontinued operations, net of tax								—			(5.1		)	(5.1		)
Net income								315.9			19.8			335.7
Preferred dividends								15.9			—			15.9
Net income attributable to Alliant Energy common shareowners								300.0			19.8			319.8
Total assets	8,438.8			814.8		966.0		10,219.6			565.9			10,785.5
Investments in equity method subsidiaries	264.3			—		—		264.3			2.3			266.6
Construction and acquisition expenditures	994.0			31.4		0.1		1,025.5			132.6			1,158.1

	Utility											Non-Regulated,			Alliant Energy
2011	Electric			Gas		Other			Total			Parent and Other			Consolidated
Operating revenues		$2,635.8			$476.7		$62.0			$3,174.5			$46.9			$3,221.4
Depreciation and amortization	289.0			28.4		1.8			319.2			1.8			321.0
Operating income (loss)	444.2			47.8		(3.2		)	488.8			24.5			513.3
Interest expense, net of AFUDC									146.6			(0.3		)	146.3
Equity income from unconsolidated investments, net	(38.7		)	—		—			(38.7		)	(0.6		)	(39.3		)
Interest income and other									(0.2		)	(4.1		)	(4.3		)
Income tax expense (benefit)									78.3			(9.1		)	69.2
Income from continuing operations, net of tax									302.8			38.6			341.4
Loss from discontinued operations, net of tax									—			(19.5		)	(19.5		)
Net income									302.8			19.1			321.9
Preferred dividends									18.3			—			18.3
Net income attributable to Alliant Energy common shareowners									284.5			19.1			303.6
Total assets	7,524.5			831.9		781.1			9,137.5			550.4			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			65.3			673.4

	Utility											Non-Regulated,			Alliant Energy
2010	Electric			Gas		Other			Total			Parent and Other			Consolidated
Operating revenues		$2,674.2			$480.6		$64.6			$3,219.4			$42.7			$3,262.1
Depreciation and amortization	255.1			25.2		5.3			285.6			1.7			287.3
Operating income (loss)	489.8			53.4		(2.5		)	540.7			19.3			560.0
Interest expense, net of AFUDC									142.8			2.0			144.8
Equity income from unconsolidated investments, net	(37.8		)	—		—			(37.8		)	(0.3		)	(38.1		)
Interest income and other									(0.6		)	(4.0		)	(4.6		)
Income taxes									140.6			7.1			147.7
Income from continuing operations, net of tax									295.7			14.5			310.2
Loss from discontinued operations, net of tax									—			(3.9		)	(3.9		)
Net income									295.7			10.6			306.3
Preferred dividends									18.7			—			18.7
Net income attributable to Alliant Energy common shareowners									277.0			10.6			287.6
Total assets	7,227.2			817.6		782.4			8,827.2			455.7			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			33.6			866.9

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

	2012		2011		2010
Utility electric operations	84	%	82	%	82	%
Utility gas operations	13	%	15	%	15	%
Utility other	2	%	2	%	2	%
Other	1	%	1	%	1	%
	100	%	100	%	100	%

Geographic Information - At December 31, 2012, 2011 and 2010, Alliant Energy did not have any long-lived assets to be held and used in foreign countries.

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):

2012	Electric		Gas		Other		Total
Operating revenues		$1,371.1		$226.7		$52.5		$1,650.3
Depreciation and amortization	171.2		16.3		1.4		188.9
Operating income	166.2		24.2		9.9		200.3
Interest expense, net of AFUDC							70.1
Interest income and other							(0.2		)
Income tax benefit							(19.8		)
Net income							150.2
Preferred dividends							12.6
Earnings available for common stock							137.6
Total assets	4,500.9		479.5		476.6		5,457.0
Construction and acquisition expenditures	291.0		16.4		0.1		307.5

2011	Electric		Gas		Other		Total
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

2010	Electric		Gas		Other			Total
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

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):

2012	Electric			Gas		Other			Total
Operating revenues		$1,218.2			$169.6		$4.2			$1,392.0
Depreciation and amortization	128.1			12.8		—			140.9
Operating income (loss)	260.0			27.3		(2.5		)	284.8
Interest expense, net of AFUDC									66.7
Equity income from unconsolidated investments	(42.1		)	—		—			(42.1		)
Interest income and other									(0.1		)
Income taxes									94.6
Net income									165.7
Preferred dividends									3.3
Earnings available for common stock									162.4
Total assets	3,937.9			335.3		489.4			4,762.6
Investments in equity method subsidiaries	264.3			—		—			264.3
Construction and acquisition expenditures	703.0			15.0		—			718.0

2011	Electric	Gas		Other		Total
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

2010	Electric	Gas		Other		Total
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