Consolidated Statements of Changes in Equity - 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, 2015		179,470,000					138,632,000
Beginning balance at Dec. 31, 2015	$ 8,795	$ 4,123	$ 4,794	$ (145)	$ 23
Beginning balance at Dec. 31, 2015						$ 5,673	$ 1,386	$ 2,700	$ 1,585	$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	834		868		(34)
Net Income	868					622			622
Dividends declared on common stock	(548)		(548)			(420)			(420)
Repurchase of common stock (in shares)		(394,000)
Repurchase of common stock	(33)	$ (33)
Premium on equity units	(98)	(98)
Issuance costs of equity units	(18)	$ (18)
Acquisition of SGG	390				390
Other comprehensive income, net of tax	12			12		0
Other comprehensive income, net of tax	1					0
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		357,000
Stock-based compensation, net contributions from noncontrolling interests, and other	162	$ 56	(3)		109
Capital contribution by parent company						120		120
Ending balance (in shares) at Dec. 31, 2016		179,433,000					138,632,000
Ending balance at Dec. 31, 2016	9,499	$ 4,030	5,114	(133)	488
Ending balance at Dec. 31, 2016						5,995	$ 1,386	2,820	1,787	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	1,112		1,134		(22)
Net Income	1,134					601			601
Dividends declared on common stock	(602)		(602)			(432)			(432)
Repurchase of common stock (in shares)		(524,000)
Repurchase of common stock	(51)	$ (51)
Other comprehensive income, net of tax	13			13		1				1
Other comprehensive income, net of tax	1					1
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		478,000
Stock-based compensation, net contributions from noncontrolling interests, and other	$ 19	$ 10	(3)		12
Capital contribution by parent company						$ 100		100
Ending balance (in shares) at Dec. 31, 2017	179,386,967	179,387,000				138,632,234	138,632,000
Ending balance at Dec. 31, 2017	$ 9,990	$ 3,989	5,643	(120)	478
Ending 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)	1,118		1,120		(2)
Net Income	1,120					664			664
Dividends declared on common stock	(653)		(653)			(461)			(461)
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
Other comprehensive income, net of tax	5			5		0
Other comprehensive income, net of tax	0					0
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		532,000
Stock-based compensation, net contributions from noncontrolling interests, and other	$ 56	$ 55	(3)		4
Capital contribution by parent company						$ 325		325
Ending balance (in shares) at Dec. 31, 2018	181,925,281	181,925,000				138,632,234	138,632,000
Ending balance at Dec. 31, 2018	$ 10,717	$ 4,245	$ 6,112	$ (120)	$ 480
Ending balance at Dec. 31, 2018	$ 10,237					$ 6,793	$ 1,386	$ 3,245	$ 2,162	$ 0