Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Revenues
Utility operations	$ 1,514	$ 1,423	$ 3,254	$ 3,141
Non-utility operations	1,645	1,432	3,658	2,950
Operating Revenues	3,159	2,855	6,912	6,091
Operating Expenses
Fuel, purchased power, and gas — utility	434	396	987	925
Fuel, purchased power, and gas — non-utility	1,443	1,248	3,216	2,428
Operation and maintenance	583	542	1,117	1,126
Depreciation and amortization	272	249	553	498
Taxes other than income	97	97	208	206
Asset (gains) losses and impairments, net	1	3	(2)	3
Operating Expenses	2,830	2,535	6,079	5,186
Operating Income	329	320	833	905
Other (Income) and Deductions
Interest expense	135	133	270	258
Interest income	(3)	(2)	(6)	(5)
Non-operating retirement benefits, net	9	17	18	33
Other income	(82)	(66)	(163)	(130)
Other expenses	15	6	40	13
Total Other (Income) and Deductions	74	88	159	169
Income Before Income Taxes	255	232	674	736
Income Tax Expense	19	57	87	167
Net Income	236	175	587	569
Less: Net Income (Loss) Attributable to Noncontrolling Interests	2	(2)	(8)	(8)
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 234	$ 177	$ 595	$ 577
Basic Earnings per Common Share
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 1.29	$ 0.99	$ 3.29	$ 3.21
Diluted Earnings per Common Share
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 1.29	$ 0.99	$ 3.29	$ 3.21
Weighted Average Common Shares Outstanding
Basic (in shares)	181	179	180	179
Diluted (in shares)	181	179	180	179
Dividends Declared per Common Share (in dollars per share)	$ 1.77	$ 1.65	$ 2.65	$ 2.48
DTE Electric
Operating Revenues
Utility operations	$ 1,276	$ 1,218	$ 2,481	$ 2,393
Operating Expenses
Fuel, purchased power, and gas — utility	386	355	725	669
Operation and maintenance	345	336	665	719
Depreciation and amortization	202	180	414	361
Taxes other than income	74	75	155	155
Operating Expenses	1,007	946	1,959	1,904
Operating Income	269	272	522	489
Other (Income) and Deductions
Interest expense	69	72	137	138
Other income	(22)	(17)	(49)	(36)
Other expenses	15	5	40	12
Total Other (Income) and Deductions	62	60	128	114
Income Before Income Taxes	207	212	394	375
Income Tax Expense	44	74	91	131
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 163	$ 138	$ 303	$ 244