Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Revenues
Utility operations	$ 6,638	$ 6,670	$ 6,434
Non-utility operations	6,031	7,542	6,173
Operating Revenues	12,669	14,212	12,607
Operating Expenses
Fuel, purchased power, and gas — utility	1,798	1,981	1,881
Fuel, purchased power, and gas — non-utility	5,053	6,630	5,283
Operation and maintenance	2,419	2,451	2,270
Depreciation and amortization	1,263	1,124	1,030
Taxes other than income	414	405	391
Asset (gains) losses and impairments, net	15	27	41
Operating Expenses	10,962	12,618	10,896
Operating Income	1,707	1,594	1,711
Other (Income) and Deductions
Interest expense	641	559	536
Interest income	(17)	(12)	(12)
Non-operating retirement benefits, net	39	37	65
Other income	(350)	(333)	(268)
Other expenses	70	127	103
Other (Income) and Deductions	383	378	424
Income Before Income Taxes	1,324	1,216	1,287
Income Tax Expense	152	98	175
Net Income	1,172	1,118	1,112
Less: Net Income (Loss) Attributable to Noncontrolling Interests	3	(2)	(22)
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 1,169	$ 1,120	$ 1,134
Basic Earnings per Common Share
Net income attributable to DTE Energy Company (in dollars per share)	$ 6.32	$ 6.18	$ 6.32
Diluted Earnings per Common Share
Net income attributable to DTE Energy Company (in dollars per share)	$ 6.31	$ 6.17	$ 6.32
Weighted Average Common Shares Outstanding
Basic (in shares)	185	181	179
Diluted (in shares)	185	181	179
DTE Electric
Operating Revenues
Utility operations	$ 5,224	$ 5,298	$ 5,102
Operating Revenues	5,224	5,298
Operating Expenses
Fuel, purchased power, and gas — utility	1,390	1,552	1,454
Operation and maintenance	1,452	1,470	1,428
Depreciation and amortization	946	836	753
Taxes other than income	310	307	302
Asset (gains) losses and impairments, net	13	(1)	0
Operating Expenses	4,111	4,164	3,937
Operating Income	1,113	1,134	1,165
Other (Income) and Deductions
Interest expense	313	283	274
Interest income	(2)	0	0
Non-operating retirement benefits, net	(1)	0	0
Other income	(107)	(83)	(77)
Other expenses	56	77	40
Other (Income) and Deductions	259	277	237
Income Before Income Taxes	854	857	928
Income Tax Expense	138	193	327
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 716	$ 664	$ 601