Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Implementation of ASU	Common Stock	Retained Earnings	Retained Earnings Implementation of ASU	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Implementation of ASU	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, 2018			181,925,000							138,632,000
Beginning Balance at Dec. 31, 2018	$ 10,717	$ 0	$ 4,245	$ 6,112	$ 25	$ (120)	$ (25)	$ 480
Beginning Balance at Dec. 31, 2018									$ 6,793	$ 1,386	$ 3,245	$ 2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income									147			147
Net Income (Loss)	408			401				7
Dividends declared on common stock	(173)			(173)					(124)			(124)
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	2					2
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)			472,000
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other	(34)		$ (21)	(1)				(12)
Ending Balance (in shares) at Mar. 31, 2019			183,212,000							138,632,000
Ending Balance at Mar. 31, 2019	11,020		$ 4,324	6,364		(143)		475
Ending Balance at Mar. 31, 2019									6,816	$ 1,386	3,245	2,185
Beginning Balance (in shares) at Dec. 31, 2018			181,925,000							138,632,000
Beginning Balance at Dec. 31, 2018	10,717	0	$ 4,245	6,112	25	(120)	(25)	480
Beginning Balance at Dec. 31, 2018									6,793	$ 1,386	3,245	2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	902								587
Net Income (Loss)	904
Other comprehensive income (loss), net of tax	(1)								0
Ending Balance (in shares) at Sep. 30, 2019			183,397,000							138,632,000
Ending Balance at Sep. 30, 2019	10,904		$ 4,370	6,516		(146)		164
Ending Balance at Sep. 30, 2019									7,010	$ 1,386	3,245	2,379
Beginning Balance (in shares) at Dec. 31, 2018			181,925,000							138,632,000
Beginning Balance at Dec. 31, 2018	$ 10,717	$ 0	$ 4,245	6,112	$ 25	(120)	$ (25)	480
Beginning Balance at Dec. 31, 2018									$ 6,793	$ 1,386	3,245	2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Implementation of ASU	us-gaap:AccountingStandardsUpdate201802Member
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
Beginning Balance (in shares) at Mar. 31, 2019			183,212,000							138,632,000
Beginning Balance at Mar. 31, 2019	11,020		$ 4,324	6,364		(143)		475
Beginning Balance at Mar. 31, 2019									6,816	$ 1,386	3,245	2,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income									133			133
Net Income (Loss)	179			182				(3)
Dividends declared on common stock	(347)			(347)					(123)			(123)
Other comprehensive income (loss), net of tax	(3)					(3)
Purchase of noncontrolling interests, principally SGG	(300)		$ (3)					(297)
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)			90,000
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other	20		$ 23	(1)				(2)
Ending Balance (in shares) at Jun. 30, 2019			183,302,000							138,632,000
Ending Balance at Jun. 30, 2019	10,569		$ 4,344	6,198		(146)		173
Ending Balance at Jun. 30, 2019									6,826	$ 1,386	3,245	2,195
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	319								307			307
Net Income (Loss)	317			319				(2)
Dividends declared on common stock									(123)			(123)
Other comprehensive income (loss), net of tax	0								0
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)			95,000
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other	18		$ 26	(1)				(7)
Ending Balance (in shares) at Sep. 30, 2019			183,397,000							138,632,000
Ending Balance at Sep. 30, 2019	$ 10,904		$ 4,370	6,516		(146)		164
Ending Balance at Sep. 30, 2019									$ 7,010	$ 1,386	3,245	2,379
Beginning Balance (in shares) at Dec. 31, 2019	192,208,533		192,209,000						138,632,324	138,632,000
Beginning Balance at Dec. 31, 2019	$ 11,836		$ 5,233	6,587		(148)		164
Beginning Balance at Dec. 31, 2019	11,672								$ 7,195	$ 1,386	3,425	2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income									94			94
Net Income (Loss)	342			340				2
Dividends declared on common stock	(195)			(195)					(135)			(135)
Other comprehensive income (loss), net of tax	3					3
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)			403,000
Stock-based compensation, net (distributions to) contributions 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	192,208,533		192,209,000						138,632,324	138,632,000
Beginning Balance at Dec. 31, 2019	$ 11,836		$ 5,233	6,587		(148)		164
Beginning Balance at Dec. 31, 2019	11,672								$ 7,195	$ 1,386	3,425	2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,093								677
Net Income (Loss)	1,096
Other comprehensive income (loss), net of tax	$ 10								$ 0
Ending Balance (in shares) at Sep. 30, 2020	193,559,593		193,560,000						138,632,324	138,632,000
Ending Balance at Sep. 30, 2020	$ 12,488		$ 5,369	7,092		(138)		165
Ending Balance at Sep. 30, 2020	12,323								$ 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									183			183
Net Income (Loss)	277			277
Dividends declared on common stock	(390)			(390)					(134)			(134)
Other comprehensive income (loss), net of tax	4					4
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)			39,000
Stock-based compensation, net (distributions to) contributions 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	476								400			400
Net Income (Loss)	477			476				1
Dividends declared on common stock									(135)			(135)
Capital contribution by parent company									400		400
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 (loss), net of tax	3					3			$ 0
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)			117,000
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other	$ 23		$ 29	(2)				(4)
Ending Balance (in shares) at Sep. 30, 2020	193,559,593		193,560,000						138,632,324	138,632,000
Ending Balance at Sep. 30, 2020	$ 12,488		$ 5,369	$ 7,092		$ (138)		$ 165
Ending Balance at Sep. 30, 2020	$ 12,323								$ 7,868	$ 1,386	$ 3,825	$ 2,657