Segment and Related Information

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Segment and Related Information

SEGMENT AND RELATED INFORMATION

DTE Energy sets strategic goals, allocates resources, and evaluates performance based on the following structure:

Electric segment consists principally of DTE Electric, which is engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.2 million residential, commercial, and industrial customers in southeastern Michigan.

Gas segment consists principally of DTE Gas, which is engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.2 million residential, commercial, and industrial customers throughout Michigan and the sale of storage and transportation capacity.

Gas Storage and Pipelines consists of natural gas pipeline, gathering, and storage businesses.

Power and Industrial Projects is comprised primarily of projects that deliver energy and utility-type products and services to industrial, commercial, and institutional customers, produce reduced emissions fuel, and sell electricity from renewable energy projects.

Energy Trading consists of energy marketing and trading operations.

Corporate and Other includes various holding company activities, holds certain non-utility debt, and energy-related investments.

The federal income tax provisions or benefits of DTE Energy’s subsidiaries are determined on an individual company basis and recognize the tax benefit of tax credits and net operating losses, if applicable. The state and local income tax provisions of the utility subsidiaries are determined on an individual company basis and recognize the tax benefit of various tax credits and net operating losses, if applicable. The subsidiaries record federal, state, and local income taxes payable to or receivable from DTE Energy based on the federal, state, and local tax provisions of each company.

Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of the sale of reduced emissions fuel, power sales, and natural gas sales in the following segments:

	Year Ended December 31,
	2015		2014		2013
	(In millions)
Electric	$	36	$	29	$	26
Gas	3		6		4
Gas Storage and Pipelines	8		9		3
Power and Industrial Projects	785		794		816
Energy Trading	32		33		43
Corporate and Other	4		3		(24		)
	$	868	$	874	$	868

Financial data of DTE Energy's business segments follows:

	Electric		Gas		Gas Storage and Pipelines		Power and Industrial Projects		Energy Trading		Corporate and Other		Reclassifications and Eliminations		Total
	(In millions)
2015
Operating Revenues — Utility operations	$	4,901	1,376		—		—		—		—		(39	)	$	6,238
Operating Revenues — Non-utility operations	$	—	—		243		2,224		2,459		2		(829	)	$	4,099
Depreciation and amortization	$	637	104		30		78		2		1		—		$	852
Interest income	$	—	(7	)	(8	)	(8	)	(2	)	(52	)	64		$	(13	)
Interest expense	$	258	62		24		32		6		132		(64	)	$	450
Equity in earnings of equity method investees	$	2	6		47		8		—		3		—		$	66
Income Tax Expense (Benefit)	$	290	72		70		(140	)	(15	)	(47	)	—		$	230
Net Income (Loss) Attributable to DTE Energy Company	$	542	132		107		16		(22	)	(48	)	—		$	727
Investment in equity method investees	$	10	9		296		183		—		16		—		$	514
Capital expenditures and acquisitions	$	1,785	273		161		36		6		—		—		$	2,261
Goodwill	$	1,208	743		24		26		17		—		—		$	2,018
Total Assets	$	19,539	4,299		1,047		860		590		3,530		(1,128	)	$	28,737

	Electric			Gas		Gas Storage and Pipelines		Power and Industrial Projects		Energy Trading	Corporate and Other		Reclassifications and Eliminations		Total
	(In millions)
2014
Operating Revenues — Utility operations	$	5,283		1,636		—		—		—	—		(35	)	$	6,884
Operating Revenues — Non-utility operations	$	—		—		203		2,289		3,762	2		(839	)	$	5,417
Depreciation and amortization	$	933		99		34		77		1	1		—		$	1,145
Interest income	$	(1	)	(7	)	(6	)	(5	)	—	(48	)	57		$	(10	)
Interest expense	$	250		57		22		28		7	122		(57	)	$	429
Equity in earnings of equity method investees	$	1		7		35		5		—	—		—		$	48
Income Tax Expense (Benefit)	$	296		78		53		(100	)	77	(40	)	—		$	364
Net Income (Loss) Attributable to DTE Energy Company	$	528		140		82		90		122	(57	)	—		$	905
Investment in equity method investees	$	8		10		224		184		—	8		—		$	434
Capital expenditures and acquisitions	$	1,561		224		184		77		3	—		—		$	2,049
Goodwill	$	1,208		743		24		26		17	—		—		$	2,018
Total Assets	$	18,713		4,247		883		998		755	3,209		(906	)	$	27,899

	Electric			Gas		Gas Storage and Pipelines		Power and Industrial Projects		Energy Trading		Corporate and Other		Reclassifications and Eliminations		Total
	(In millions)
2013
Operating Revenues — Utility operations	$	5,199		1,474		—		—		—		—		(30	)	$	6,643
Operating Revenues — Non-utility operations	$	—		—		132		1,950		1,771		3		(838	)	$	3,018
Depreciation and amortization	$	902		95		23		72		1		1		—		$	1,094
Interest income	$	(1	)	(7	)	(7	)	(6	)	—		(51	)	63		$	(9	)
Interest expense	$	268		58		18		27		8		120		(63	)	$	436
Equity in earnings of equity method investees	$	1		6		44		8		—		—		—		$	59
Income Tax Expense (Benefit)	$	252		77		45		(45	)	(38	)	(37	)	—		$	254
Net Income (Loss) Attributable to DTE Energy Company	$	484		143		70		66		(58	)	(44	)	—		$	661
Investment in equity method investees	$	9		10		201		189		—		6		—		$	415
Capital expenditures and acquisitions	$	1,325		209		245		93		3		1		—		$	1,876
Goodwill	$	1,208		743		24		26		17		—		—		$	2,018
Total Assets	$	17,508		3,920		823		1,054		624		2,945		(939	)	$	25,935