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)	922		929		(7)
Net Income	929					608			608
Dividends declared on common stock	(481)		(481)			$ (346)			(346)
Issuance of common stock (in shares)		255,000
Issuance of common stock	26	$ 26
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	7			7
Net unrealized gains on derivatives, net of tax	1			1
Foreign currency translation	(1)			(1)
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		532,000
Stock-based compensation, net contributions from noncontrolling interests, and other	$ 51	$ 42	(3)		12
Ending Balance (in shares) at Sep. 30, 2018	181,925,024	181,925,000				138,632,324	138,632,000
Ending Balance at Sep. 30, 2018	$ 10,690	$ 4,232	$ 6,093	$ (118)	$ 483
Ending Balance at Sep. 30, 2018	$ 10,207					$ 6,527	$ 1,386	$ 2,920	$ 2,221	$ 0