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 1.3 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 holds 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,
	2017		2016		2015
	(In millions)
Electric	$	48	$	43	$	36
Gas	8		9		3
Gas Storage and Pipelines	42		9		8
Power and Industrial Projects	569		602		785
Energy Trading	35		39		32
Corporate and Other	2		2		4
	$	704	$	704	$	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)
2017
Operating Revenues — Utility operations	$	5,102	1,388		—		—		—		—		(56	)	$	6,434
Operating Revenues — Non-utility operations	$	—	—		453		2,089		4,277		2		(648	)	$	6,173
Depreciation and amortization	$	753	123		76		72		5		1		—		$	1,030
Interest expense	$	274	65		77		29		5		192		(106	)	$	536
Interest income	$	—	(7	)	(14	)	(7	)	(2	)	(88	)	106		$	(12	)
Equity in earnings of equity method investees	$	1	2		90		9		—		—		—		$	102
Income Tax Expense (Benefit)^(a)	$	321	78		(30	)	(195	)	49		(48	)	—		$	175
Net Income (Loss) Attributable to DTE Energy Company	$	606	146		275		138		72		(103	)	—		$	1,134
Investment in equity method investees	$	7	11		879		150		—		26		—		$	1,073
Capital expenditures and acquisitions	$	1,574	463		137		56		7		13		—		$	2,250
Goodwill	$	1,208	743		299		26		17		—		—		$	2,293
Total Assets	$	21,163	5,072		2,594		593		725		5,324		(1,704	)	$	33,767

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(a)	Includes Income Tax Expense (Benefit) of $(5) million, $(115) million, $(21) million, $2 million, and $34 million for Electric — non-utility, Gas Storage and Pipelines, Power and Industrial Projects, Energy Trading, and Corporate and Other, respectively, related to the enactment of the TCJA.



	Electric			Gas		Gas Storage and Pipelines		Power and Industrial Projects		Energy Trading		Corporate and Other		Reclassifications and Eliminations		Total
	(In millions)
2016
Operating Revenues — Utility operations	$	5,225		1,324		—		—		—		—		(52	)	$	6,497
Operating Revenues — Non-utility operations	$	—		—		302		1,906		2,575		2		(652	)	$	4,133
Depreciation and amortization	$	750		106		45		72		3		—		—		$	976
Interest expense	$	264		60		39		32		6		148		(77	)	$	472
Interest income	$	(8	)	(6	)	(9	)	(8	)	(1	)	(65	)	77		$	(20	)
Equity in earnings of equity method investees	$	2		6		60		—		—		—		—		$	68
Income Tax Expense (Benefit)	$	353		77		71		(140	)	(29	)	(61	)	—		$	271
Net Income (Loss) Attributable to DTE Energy Company	$	622		138		119		95		(45	)	(61	)	—		$	868
Investment in equity method investees	$	11		10		538		166		—		27		—		$	752
Capital expenditures and acquisitions	$	1,503		395		1,322		39		7		3		—		$	3,269
Goodwill	$	1,208		743		292		26		17		—		—		$	2,286
Total Assets	$	20,417		4,729		2,417		683		660		4,648		(1,513	)	$	32,041



	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 expense	$	258	62		24		32		6		132		(64	)	$	450
Interest income	$	—	(7	)	(8	)	(8	)	(2	)	(52	)	64		$	(13	)
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	$	19,503	4,294		1,047		860		590		3,496		(1,128	)	$	28,662