Report of Business Segments

12 Months Ended

Dec. 31, 2011

Segment Reporting [Abstract]

Report of Business Segments

Report of Business Segments

The Company's business is divided into four segments for financial reporting purposes.  These segments are as follows: (i) electric utility, which is engaged in the generation, transmission, distribution and sale of electric energy, (ii) natural gas transportation and storage, (iii) natural gas gathering and processing and (iv) natural gas marketing.  Other Operations primarily includes the operations of the holding company.  Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations.  In reviewing its segment operating results, the Company focuses on operating income as its measure of segment profit and loss, and, therefore, has presented this information below.  The following tables summarize the results of the Company's business segments for the years ended December 31, 2011, 2010 and 2009.

2011	Electric Utility		Transportation and Storage		Gathering and Processing			Marketing			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	2,211.5	$	410.5	$	1,167.1		$	678.0		$	—		$	(551.2	)	$	3,915.9
Cost of goods sold	1,013.5		253.3		870.7			688.1			—			(547.7		)	2,277.9
Gross margin on revenues	1,198.0		157.2		296.4			(10.1		)	—			(3.5		)	1,638.0
Other operation and maintenance	436.0		46.5		111.8			7.3			(17.3		)	(3.1		)	581.2
Depreciation and amortization	216.1		21.6		55.6			0.4			13.4			—			307.1
Impairment of assets	—		—		6.3			—			—			—			6.3
Gain on insurance proceeds	—		—		(3.0		)	—			—			—			(3.0		)
Taxes other than income	73.6		14.7		7.0			0.3			4.1			—			99.7
Operating income (loss)	$	472.3	$	74.4	$	118.7		$	(18.1	)	$	(0.2	)	$	(0.4	)	$	646.7
Total assets	$	6,620.9	$	1,805.5	$	1,483.8		$	74.5		$	166.6		$	(1,245.3	)	$	8,906.0
Capital expenditures (A)	$	844.5	$	39.3	$	572.0		$	1.8		$	13.8		$	(0.6	)	$	1,470.8

(A) Includes $200.4 million related to the acquisition of certain gas gathering assets as discussed in Note 3.

2010	Electric Utility		Transportation and Storage		Gathering and Processing		Marketing			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	2,109.9	$	403.6	$	1,005.6	$	798.5		$	—		$	(600.7	)	$	3,716.9
Cost of goods sold	1,000.2		246.4		733.3		804.7			—			(597.2		)	2,187.4
Gross margin on revenues	1,109.7		157.2		272.3		(6.2		)	—			(3.5		)	1,529.5
Other operation and maintenance	418.1		48.9		91.5		8.4			(13.6		)	(3.5		)	549.8
Depreciation and amortization	208.7		21.1		50.1		0.1			11.3			—			291.3
Impairment of assets	—		0.7		0.4		—			—			—			1.1
Taxes other than income	69.2		13.9		6.4		0.3			3.6			—			93.4
Operating income (loss)	$	413.7	$	72.6	$	123.9	$	(15.0	)	$	(1.3	)	$	—		$	593.9
Total assets	$	5,898.1	$	1,246.1	$	973.8	$	94.5		$	135.4		$	(678.8	)	$	7,669.1
Capital expenditures	$	631.6	$	70.2	$	164.0	$	2.4		$	14.1		$	(2.4	)	$	879.9

2009	Electric Utility		Transportation and Storage		Gathering and Processing		Marketing			Other Operations			Eliminations			Total
(In millions)
Operating revenues	$	1,751.2	$	401.0	$	657.5	$	619.9		$	—		$	(559.9	)	$	2,869.7
Cost of goods sold	796.3		239.9		458.8		617.7			—			(555.0		)	1,557.7
Gross margin on revenues	954.9		161.1		198.7		2.2			—			(4.9		)	1,312.0
Other operation and maintenance	348.0		40.9		87.2		9.2			(13.9		)	(4.6		)	466.8
Depreciation and amortization	187.4		20.4		43.9		0.1			10.8			—			262.6
Impairment of assets	0.3		0.9		1.9		—			—			—			3.1
Taxes other than income	65.1		13.2		5.5		0.4			3.4			—			87.6
Operating income (loss)	$	354.1	$	85.7	$	60.2	$	(7.5	)	$	(0.3	)	$	(0.3	)	$	491.9
Total assets	$	5,478.1	$	1,159.5	$	866.1	$	125.2		$	137.3		$	(499.5	)	$	7,266.7
Capital expenditures	$	600.5	$	71.4	$	166.0	$	—		$	10.2		$	(0.3	)	$	847.8