Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating Revenues
Utility operations	$ 1,669	$ 1,573	$ 4,923	$ 4,714
Non-utility operations	1,881	1,672	5,539	4,622
Operating Revenues	3,550	3,245	10,462	9,336
Operating Expenses
Fuel, purchased power, and gas — utility	453	437	1,440	1,362
Fuel, purchased power, and gas — non-utility	1,682	1,469	4,898	3,897
Operation and maintenance	604	550	1,721	1,676
Depreciation and amortization	273	258	826	756
Taxes other than income	99	91	307	297
Asset (gains) losses and impairments, net	10	6	8	9
Operating Expenses	3,121	2,811	9,200	7,997
Operating Income	429	434	1,262	1,339
Other (Income) and Deductions
Interest expense	142	146	412	404
Interest income	(3)	(4)	(9)	(9)
Non-operating retirement benefits, net	9	16	27	49
Other income	(99)	(74)	(262)	(204)
Other expenses	11	13	51	26
Total Other (Income) and Deductions	60	97	219	266
Income Before Income Taxes	369	337	1,043	1,073
Income Tax Expense	34	74	121	241
Net Income	335	263	922	832
Less: Net Income (Loss) Attributable to Noncontrolling Interests	1	(7)	(7)	(15)
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 334	$ 270	$ 929	$ 847
Basic Earnings per Common Share
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 1.84	$ 1.51	$ 5.13	$ 4.72
Diluted Earnings per Common Share
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 1.84	$ 1.51	$ 5.13	$ 4.72
Weighted Average Common Shares Outstanding
Basic (in shares)	182	179	181	179
Diluted (in shares)	182	179	181	179
Dividends Declared per Common Share (in dollars per share)	$ 0	$ 0	$ 2.65	$ 2.48
DTE Electric
Operating Revenues
Utility operations	$ 1,521	$ 1,434	$ 4,002	$ 3,827
Operating Expenses
Fuel, purchased power, and gas — utility	438	428	1,163	1,097
Operation and maintenance	360	349	1,025	1,068
Depreciation and amortization	202	188	616	549
Taxes other than income	77	74	232	229
Operating Expenses	1,077	1,039	3,036	2,943
Operating Income	444	395	966	884
Other (Income) and Deductions
Interest expense	73	68	210	206
Non-operating retirement benefits, net	(1)	0	(1)	0
Other income	(23)	(21)	(72)	(57)
Other expenses	9	11	49	23
Total Other (Income) and Deductions	58	58	186	172
Income Before Income Taxes	386	337	780	712
Income Tax Expense	81	118	172	249
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 305	$ 219	$ 608	$ 463