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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Implementation of ASU 2016-01	$ 0		$ 5	$ (5)		$ 0			$ 3	$ (3)
Beginning Balance (in shares) at Dec. 31, 2017	179,386,967	179,387,000				138,632,324	138,632,000
Beginning Balance at Dec. 31, 2017	$ 9,990	$ 3,989	5,643	(120)	$ 478
Beginning Balance at Dec. 31, 2017	9,512					$ 6,265	$ 1,386	$ 2,920	1,956	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	351		361		(10)
Net Income	361					140			140
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
Benefit obligations, net of tax	2			2
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	181,483,163	181,483,000				138,632,324	138,632,000
Ending Balance at Mar. 31, 2018	$ 10,363	$ 4,163	$ 5,848	$ (123)	$ 475
Ending Balance at Mar. 31, 2018	$ 9,888					$ 6,290	$ 1,386	$ 2,920	$ 1,984	$ 0