Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests	DTE Electric	DTE Electric Cumulative Effect, Period of Adoption, Adjustment	DTE Electric Common Stock	DTE Electric Additional Paid-in Capital	DTE Electric Retained Earnings	DTE Electric Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	DTE Electric Accumulated Other Comprehensive Income (Loss)	DTE Electric Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2017			179,387,000								138,632,000
Beginning balance at Dec. 31, 2017	$ 9,990	$ 0	$ 3,989	$ 5,643	$ 5	$ (120)	$ (5)	$ 478
Beginning balance at Dec. 31, 2017									$ 6,265	$ 0	$ 1,386	$ 2,920	$ 1,956	$ 3	$ 3	$ (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 (loss), net of tax	5					5			0
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other (in shares)			532,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	56		$ 55	(3)				4
Capital contribution by parent company									325			325
Ending balance (in shares) at Dec. 31, 2018			181,925,000								138,632,000
Ending balance at Dec. 31, 2018	10,717		$ 4,245	6,112		(120)		480
Ending balance at Dec. 31, 2018									6,793		$ 1,386	3,245	2,162		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Implementation of ASU 2018-02	0			25		(25)
Net Income (Loss)	1,172			1,169				3
Net Income	1,169								716				716
Dividends declared on common stock	(714)			(714)					(494)				(494)
Issuance of common stock (in shares)			8,634,000
Issuance of common stock	1,014		$ 1,014
Premium on equity units	(150)		(150)
Issuance costs of equity units	(30)		$ (30)
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	(3)					(3)			0
Purchase of noncontrolling interests, principally SGG	(300)		$ (3)					(297)
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other (in shares)			835,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	$ 30		$ 57	(5)				(22)
Capital contribution by parent company									$ 180			180
Ending balance (in shares) at Dec. 31, 2019	192,208,533		192,209,000						138,632,324		138,632,000
Ending balance at Dec. 31, 2019	$ 11,836		$ 5,233	6,587		(148)		164
Ending balance at Dec. 31, 2019	11,672								$ 7,195		$ 1,386	3,425	2,384		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	1,371			1,368				3
Net Income	1,368								778				778
Dividends declared on common stock	(796)			(796)					(539)				(539)
Issuance of common stock (in shares)			192,000
Issuance of common stock	22		$ 22
Contribution of common stock to pension plan (in shares)			694,000
Contribution of common stock to pension plan	82		$ 82
Other comprehensive income (loss), net of tax	11					11			0
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other (in shares)			676,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	$ 63		$ 69	(3)				(3)
Capital contribution by parent company									$ 636			636
Ending balance (in shares) at Dec. 31, 2020	193,770,617		193,771,000						138,632,324		138,632,000
Ending balance at Dec. 31, 2020	$ 12,589		$ 5,406	$ 7,156		$ (137)		$ 164
Ending balance at Dec. 31, 2020	$ 12,425								$ 8,070		$ 1,386	$ 4,061	$ 2,623		$ 0