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, 2014		176,991,000					138,632,000
Beginning balance at Dec. 31, 2014	$ 8,342	$ 3,904	$ 4,578	$ (155)	$ 15
Beginning balance at Dec. 31, 2014						$ 5,196	$ 1,386	$ 2,400	$ 1,436	$ (26)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	720		727		(7)
Net Income	727					544			544
Dividends declared on common stock	(510)		(510)			(395)			(395)
Transfer of benefit obligations, net of tax						27				27
Issuance of common stock (in shares)		105,000
Issuance of common stock	9	$ 9
Contribution of common stock to pension plan/VEBA Trust (in shares)		1,428,000
Contribution of common stock to pension plan/VEBA Trust	117	$ 117
Benefit obligations, net of tax	13			13
Net change in unrealized gains on derivatives, net of tax	0
Net change in unrealized gains on investments, net of tax	1			1		1				1
Capital contribution by parent company						300		300
Foreign currency translation	(4)			(4)
Stock-based compensation, net contributions from noncontrolling interests, and other (in shares)		946,000
Stock-based compensation, net contributions from noncontrolling interests, and other	107	$ 93	(1)		15
Ending balance (in shares) at Dec. 31, 2015		179,470,000					138,632,000
Ending balance at Dec. 31, 2015	8,795	$ 4,123	4,794	(145)	23
Ending balance at Dec. 31, 2015						5,673	$ 1,386	2,700	1,585	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Implementation of ASU 2016-09	3		3
Net Income (Loss)	834		868		(34)
Net Income	868					622			622
Dividends declared on common stock	(548)		(548)			(420)			(420)
Transfer of benefit obligations, net of tax						0
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
Benefit obligations, net of tax	11			11
Net change in unrealized gains on derivatives, net of tax	0
Net change in unrealized gains on investments, net of tax	1			1		0
Capital contribution by parent company						$ 120		120
Foreign currency translation	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
Ending balance (in shares) at Dec. 31, 2016	179,432,581	179,433,000				138,632,324	138,632,000
Ending balance at Dec. 31, 2016	$ 9,499	$ 4,030	5,114	(133)	488
Ending balance at Dec. 31, 2016	9,011					$ 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)
Transfer of benefit obligations, net of tax						0
Repurchase of common stock (in shares)		(524,000)
Repurchase of common stock	(51)	$ (51)
Benefit obligations, net of tax	10			10
Net change in unrealized gains on derivatives, net of tax	1			1
Net change in unrealized gains on investments, net of tax	1			1		1				1
Capital contribution by parent company						$ 100		100
Foreign currency translation	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
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