Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Revenues
Utility operations	$ 6,670	$ 6,434	$ 6,497
Non-utility operations	7,542	6,173	4,133
Operating Revenues	14,212	12,607	10,630
Operating Expenses
Fuel, purchased power, and gas — utility	1,981	1,881	1,968
Fuel, purchased power, and gas — non-utility	6,630	5,283	3,562
Operation and maintenance	2,451	2,270	2,261
Depreciation and amortization	1,124	1,030	976
Taxes other than income	405	391	370
Asset (gains) losses and impairments, net	27	41	7
Operating Expenses	12,618	10,896	9,144
Operating Income	1,594	1,711	1,486
Other (Income) and Deductions
Interest expense	559	536	472
Interest income	(12)	(12)	(20)
Non-operating retirement benefits, net	37	65	41
Other income	(333)	(268)	(207)
Other expenses	127	103	95
Other (Income) and Deductions	378	424	381
Income Before Income Taxes	1,216	1,287	1,105
Income Tax Expense	98	175	271
Net Income	1,118	1,112	834
Less: Net Loss Attributable to Noncontrolling Interests	(2)	(22)	(34)
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 1,120	$ 1,134	$ 868
Basic Earnings per Common Share
Net income attributable to DTE Energy Company (in dollars per share)	$ 6.18	$ 6.32	$ 4.84
Diluted Earnings per Common Share
Net income attributable to DTE Energy Company (in dollars per share)	$ 6.17	$ 6.32	$ 4.83
Weighted Average Common Shares Outstanding
Basic (in shares)	181	179	179
Diluted (in shares)	181	179	179
DTE Electric
Operating Revenues
Utility operations	$ 5,298	$ 5,102	$ 5,225
Operating Revenues	5,298	5,102
Operating Expenses
Fuel, purchased power, and gas — utility	1,552	1,454	1,532
Operation and maintenance	1,470	1,428	1,455
Depreciation and amortization	836	753	750
Taxes other than income	307	302	284
Asset (gains) losses and impairments, net	(1)	0	0
Operating Expenses	4,164	3,937	4,021
Operating Income	1,134	1,165	1,204
Other (Income) and Deductions
Interest expense	283	274	264
Interest income	0	0	(8)
Other income	(83)	(77)	(61)
Other expenses	77	40	34
Other (Income) and Deductions	277	237	229
Income Before Income Taxes	857	928	975
Income Tax Expense	193	327	353
Net Income Attributable to DTE Energy Company/DTE Electric Company	$ 664	$ 601	$ 622