Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Revenues
Utility operations	$ 6,497	$ 6,238	$ 6,884
Non-utility operations	4,133	4,099	5,417
Operating Revenues	10,630	10,337	12,301
Operating Expenses
Fuel, purchased power, and gas — utility	1,968	2,081	2,407
Fuel, purchased power, and gas — non-utility	3,562	3,481	4,615
Operation and maintenance	2,302	2,214	2,204
Depreciation and amortization	976	852	1,145
Taxes other than income	370	364	352
Asset (gains) losses and impairments, net	7	106	(12)
Total operating expenses	9,185	9,098	10,711
Operating Income	1,445	1,239	1,590
Other (Income) and Deductions
Interest expense	472	450	429
Interest income	(20)	(13)	(10)
Other income	(207)	(209)	(196)
Other expenses	95	61	92
Total other (income) and deductions	340	289	315
Income Before Income Taxes	1,105	950	1,275
Income Tax Expense	271	230	364
Net Income	834	720	911
Less: Net Income (Loss) Attributable to Noncontrolling Interests	(34)	(7)	6
Net Income	$ 868	$ 727	$ 905
Basic Earnings per Common Share
Net income attributable to DTE Energy company (in dollars per share)	$ 4.84	$ 4.05	$ 5.11
Diluted Earnings per Common Share
Net income attributable to DTE Energy company (in dollars per share)	$ 4.83	$ 4.05	$ 5.10
Weighted Average Common Shares Outstanding
Basic (in shares)	179	179	177
Diluted (in shares)	179	179	177
Dividends Declared per Common Share	$ 3.06	$ 2.84	$ 2.69
DTE Electric
Operating Revenues
Utility operations	$ 5,225	$ 4,900	$ 5,282
Operating Revenues	5,225	4,900
Operating Expenses
Fuel and purchased power — utility	1,532	1,574	1,706
Operation and maintenance	1,455	1,342	1,331
Depreciation and amortization	750	633	927
Taxes other than income	284	277	267
Asset (gains) losses and impairments, net	0	0	(1)
Total operating expenses	4,021	3,826	4,230
Operating Income	1,204	1,074	1,052
Other (Income) and Deductions
Interest expense	264	258	250
Interest income	(8)	0	(1)
Other income	(61)	(60)	(62)
Other expenses	34	40	35
Total other (income) and deductions	229	238	222
Income Before Income Taxes	975	836	830
Income Tax Expense	353	292	298
Net Income	$ 622	$ 544	$ 532