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	DTE Electric Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 31, 2017		179,387,000					138,632,000
Beginning Balance at Dec. 31, 2017	$ 9,990	$ 3,989	$ 5,643	$ (120)	$ 478
Beginning Balance at Dec. 31, 2017						$ 6,265	$ 1,386	$ 2,920	$ 1,956	$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income						140			140
Net Income (Loss)	351		361		(10)
Dividends declared on common stock	(160)		(160)			(115)			(115)
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	2			2
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other (in shares)		345,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	5	$ (1)	(1)		7
Ending Balance (in shares) at Mar. 31, 2018		181,483,000					138,632,000
Ending Balance at Mar. 31, 2018	10,363	$ 4,163	5,848	(123)	475
Ending Balance at Mar. 31, 2018						6,290	$ 1,386	2,920	1,984	0
Beginning Balance (in shares) at Dec. 31, 2017		179,387,000					138,632,000
Beginning Balance at Dec. 31, 2017	9,990	$ 3,989	5,643	(120)	478
Beginning Balance at Dec. 31, 2017						6,265	$ 1,386	2,920	1,956	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	929					608
Net Income (Loss)	922
Other comprehensive income (loss), net of tax	7					0
Ending Balance (in shares) at Sep. 30, 2018		181,925,000					138,632,000
Ending Balance at Sep. 30, 2018	10,690	$ 4,232	6,093	(118)	483
Ending Balance at Sep. 30, 2018						6,527	$ 1,386	2,920	2,221	0
Beginning Balance (in shares) at Mar. 31, 2018		181,483,000					138,632,000
Beginning Balance at Mar. 31, 2018	10,363	$ 4,163	5,848	(123)	475
Beginning Balance at Mar. 31, 2018						6,290	$ 1,386	2,920	1,984	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income						163			163
Net Income (Loss)	236		234		2
Dividends declared on common stock	(321)		(321)			(115)			(115)
Issuance of common stock (in shares)		160,000
Issuance of common stock	16	$ 16
Other comprehensive income (loss), net of tax	2			2
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other (in shares)		130,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	22	$ 26	(1)		(3)
Ending Balance (in shares) at Jun. 30, 2018		181,773,000					138,632,000
Ending Balance at Jun. 30, 2018	10,318	$ 4,205	5,760	(121)	474
Ending Balance at Jun. 30, 2018						6,338	$ 1,386	2,920	2,032	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	334					305			305
Net Income (Loss)	335		334		1
Dividends declared on common stock						(116)			(116)
Issuance of common stock (in shares)		95,000
Issuance of common stock	10	$ 10
Other comprehensive income (loss), net of tax	3			3		0
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other (in shares)		57,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	24	$ 17	(1)		8
Ending Balance (in shares) at Sep. 30, 2018		181,925,000					138,632,000
Ending Balance at Sep. 30, 2018	$ 10,690	$ 4,232	6,093	(118)	483
Ending Balance at Sep. 30, 2018						$ 6,527	$ 1,386	2,920	2,221	$ 0
Beginning Balance (in shares) at Dec. 31, 2018	181,925,281	181,925,000				138,632,324	138,632,000
Beginning Balance at Dec. 31, 2018	$ 10,717	$ 4,245	6,112	(120)	480
Beginning Balance at Dec. 31, 2018	10,237					$ 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 contributions from (distributions to) noncontrolling interests, and other (in shares)		472,000
Stock-based compensation, net contributions from (distributions to) 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	181,925,281	181,925,000				138,632,324	138,632,000
Beginning Balance at Dec. 31, 2018	$ 10,717	$ 4,245	6,112	(120)	480
Beginning Balance at Dec. 31, 2018	10,237					$ 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	183,396,510	183,397,000				138,632,324	138,632,000
Ending Balance at Sep. 30, 2019	$ 10,904	$ 4,370	6,516	(146)	164
Ending Balance at Sep. 30, 2019	10,740					$ 7,010	$ 1,386	3,245	2,379
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 contributions from (distributions to) noncontrolling interests, and other (in shares)		90,000
Stock-based compensation, net contributions from (distributions to) 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 contributions from (distributions to) noncontrolling interests, and other (in shares)		95,000
Stock-based compensation, net contributions from (distributions to) noncontrolling interests, and other	$ 18	$ 26	(1)		(7)
Ending Balance (in shares) at Sep. 30, 2019	183,396,510	183,397,000				138,632,324	138,632,000
Ending Balance at Sep. 30, 2019	$ 10,904	$ 4,370	$ 6,516	$ (146)	$ 164
Ending Balance at Sep. 30, 2019	$ 10,740					$ 7,010	$ 1,386	$ 3,245	$ 2,379