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
Beginning Balance (in shares) at Dec. 31, 2019		192,209,000					138,632,000
Beginning Balance at Dec. 31, 2019	$ 11,836	$ 5,233	$ 6,587	$ (148)	$ 164
Beginning Balance at Dec. 31, 2019						$ 7,195	$ 1,386	$ 3,425	$ 2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	342		340		2
Net Income						94			94
Dividends declared on common stock	(195)		(195)			(135)			(135)
Other comprehensive income , net of tax	3			3
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other (in shares)		403,000
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other	2	$ 2
Ending Balance (in shares) at Mar. 31, 2020		192,612,000					138,632,000
Ending Balance at Mar. 31, 2020	11,988	$ 5,235	6,732	(145)	166
Ending Balance at Mar. 31, 2020						7,154	$ 1,386	3,425	2,343
Beginning Balance (in shares) at Dec. 31, 2019		192,209,000					138,632,000
Beginning Balance at Dec. 31, 2019	11,836	$ 5,233	6,587	(148)	164
Beginning Balance at Dec. 31, 2019						7,195	$ 1,386	3,425	2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	1,096
Net Income	1,093					677
Other comprehensive income , net of tax	10					0
Ending Balance (in shares) at Sep. 30, 2020		193,560,000					138,632,000
Ending Balance at Sep. 30, 2020	12,488	$ 5,369	7,092	(138)	165
Ending Balance at Sep. 30, 2020						7,868	$ 1,386	3,825	2,657
Beginning Balance (in shares) at Mar. 31, 2020		192,612,000					138,632,000
Beginning Balance at Mar. 31, 2020	11,988	$ 5,235	6,732	(145)	166
Beginning Balance at Mar. 31, 2020						7,154	$ 1,386	3,425	2,343
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	277		277		0
Net Income						183			183
Dividends declared on common stock	(390)		(390)			(134)			(134)
Other comprehensive income , net of tax	4			4
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other (in shares)		39,000
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other	13	$ 12	(1)		2
Ending Balance (in shares) at Jun. 30, 2020		192,651,000					138,632,000
Ending Balance at Jun. 30, 2020	11,892	$ 5,247	6,618	(141)	168
Ending Balance at Jun. 30, 2020						7,203	$ 1,386	3,425	2,392
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	477		476		1
Net Income	476					400			400
Dividends declared on common stock						(135)			(135)
Issuance of common stock (in shares)		98,000
Issuance of common stock	11	$ 11
Contribution of common stock to pension plan (in shares)		694,000
Contribution of common stock to pension plan	82	$ 82
Other comprehensive income , net of tax	3			3		0
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other (in shares)		117,000
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other	23	$ 29	(2)		(4)
Capital contribution by parent company						400		400
Ending Balance (in shares) at Sep. 30, 2020		193,560,000					138,632,000
Ending Balance at Sep. 30, 2020	$ 12,488	$ 5,369	7,092	(138)	165
Ending Balance at Sep. 30, 2020						$ 7,868	$ 1,386	3,825	2,657
Beginning Balance (in shares) at Dec. 31, 2020	193,770,617	193,771,000				138,632,324	138,632,000
Beginning Balance at Dec. 31, 2020	$ 12,589	$ 5,406	7,156	(137)	164
Beginning Balance at Dec. 31, 2020	12,425					$ 8,070	$ 1,386	4,061	2,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	397		397
Net Income						208			208
Dividends declared on common stock	(210)		(210)			(147)			(147)
Repurchase of common stock (in shares)		(430,000)
Repurchase of common stock	(54)	$ (54)
Other comprehensive income , net of tax	3			3
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other (in shares)		386,000
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other	(11)	$ (8)	(1)		(2)
Ending Balance (in shares) at Mar. 31, 2021		193,727,000					138,632,000
Ending Balance at Mar. 31, 2021	$ 12,714	$ 5,344	7,342	(134)	162
Ending Balance at Mar. 31, 2021						$ 8,131	$ 1,386	4,061	2,684
Beginning Balance (in shares) at Dec. 31, 2020	193,770,617	193,771,000				138,632,324	138,632,000
Beginning Balance at Dec. 31, 2020	$ 12,589	$ 5,406	7,156	(137)	164
Beginning Balance at Dec. 31, 2020	12,425					$ 8,070	$ 1,386	4,061	2,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	598
Net Income	601					790
Other comprehensive income , net of tax	$ 11					$ 0
Ending Balance (in shares) at Sep. 30, 2021	193,727,278	193,727,000				138,632,324	138,632,000
Ending Balance at Sep. 30, 2021	$ 8,579	$ 5,366	3,317	(116)	12
Ending Balance at Sep. 30, 2021	8,567					$ 8,692	$ 1,386	4,334	2,972
Beginning Balance (in shares) at Mar. 31, 2021		193,727,000					138,632,000
Beginning Balance at Mar. 31, 2021	12,714	$ 5,344	7,342	(134)	162
Beginning Balance at Mar. 31, 2021						8,131	$ 1,386	4,061	2,684
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	179		179
Net Income						238			238
Dividends declared on common stock	(370)		(370)			(146)			(146)
Other comprehensive income , net of tax	2			2
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other (in shares)		25,000
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other	14	$ 17	(2)		(1)
Ending Balance (in shares) at Jun. 30, 2021		193,752,000					138,632,000
Ending Balance at Jun. 30, 2021	12,539	$ 5,361	7,149	(132)	161
Ending Balance at Jun. 30, 2021						8,223	$ 1,386	4,061	2,776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	22		25		(3)
Net Income	25					344			344
Dividends declared on common stock						(148)			(148)
Repurchase of common stock (in shares)		(99,000)
Repurchase of common stock	(12)	$ (12)
Other comprehensive income , net of tax	6			6		0
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other (in shares)		74,000
Stock-based compensation, net distributions/contributions to/from noncontrolling interests, and other	23	$ 17	1		5
Separation of DT Midstream	$ (3,999)		(3,858)	10	(151)
Capital contribution by parent company						$ 273		273
Ending Balance (in shares) at Sep. 30, 2021	193,727,278	193,727,000				138,632,324	138,632,000
Ending Balance at Sep. 30, 2021	$ 8,579	$ 5,366	$ 3,317	$ (116)	$ 12
Ending Balance at Sep. 30, 2021	$ 8,567					$ 8,692	$ 1,386	$ 4,334	$ 2,972