Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	DTE Electric	DTE Electric Common Stock	DTE Electric Additional Paid-in Capital	DTE Electric Retained Earnings	DTE Electric Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 31, 2017		179,387,000					138,632,000
Beginning Balance at Dec. 31, 2017	$ 9,990	$ 3,989	$ 5,643	$ (120)	$ 478
Beginning Balance at Dec. 31, 2017						$ 6,265	$ 1,386	$ 2,920	$ 1,956	$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	361					140			140
Net Income (Loss)	351		361		(10)
Dividends declared on common stock	(160)		(160)			(115)			(115)
Contribution of common stock to pension plan (in shares)		1,751,000
Contribution of common stock to pension plan	175	$ 175
Other comprehensive income (loss), net of tax	2			2		0
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		345,000
Stock-based compensation, net contributions from noncontrolling interests, and other	5	$ (1)	(1)		7
Ending Balance (in shares) at Mar. 31, 2018		181,483,000					138,632,000
Ending Balance at Mar. 31, 2018	$ 10,363	$ 4,163	5,848	(123)	475
Ending Balance at Mar. 31, 2018						$ 6,290	$ 1,386	2,920	1,984	$ 0
Beginning Balance (in shares) at Dec. 31, 2018	181,925,281	181,925,000				138,632,324	138,632,000
Beginning Balance at Dec. 31, 2018	$ 10,717	$ 4,245	6,112	(120)	480
Beginning Balance at Dec. 31, 2018	10,237					$ 6,793	$ 1,386	3,245	2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	401					147			147
Net Income (Loss)	408		401		7
Dividends declared on common stock	(173)		(173)			(124)			(124)
Contribution of common stock to pension plan (in shares)		815,000
Contribution of common stock to pension plan	100	$ 100
Other comprehensive income (loss), net of tax	2			2		$ 0
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		472,000
Stock-based compensation, net contributions from noncontrolling interests, and other	$ (34)	$ (21)	(1)		(12)
Ending Balance (in shares) at Mar. 31, 2019	183,212,427	183,212,000				138,632,324	138,632,000
Ending Balance at Mar. 31, 2019	$ 11,020	$ 4,324	$ 6,364	$ (143)	$ 475
Ending Balance at Mar. 31, 2019	$ 10,545					$ 6,816	$ 1,386	$ 3,245	$ 2,185