Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations									$ 796	$ 1,054	$ 955
Less: Allocation of earnings to net restricted stock awards									(2)	(2)	(2)
Net income from continuing operations available to common shareholders — basic									794	1,052	953
Net Income Attributable to DTE Energy Company — discontinued operations									111	314	214
Net income available to common shareholders — basic									$ 905	$ 1,366	$ 1,167
Average number of common shares outstanding — basic (in shares)									193.0	193.0	185.0
Income from continuing operations (in dollars per share)	$ 1.56	$ 0.30	$ 0.60	$ 1.65	$ 1.08	$ 1.93	$ 1.06	$ 1.39	$ 4.11	$ 5.46	$ 5.16
Income (loss) from discontinued operations (in dollars per share)	0.02	(0.17)	0.32	0.40	0.34	0.54	0.38	0.38	0.57	1.63	1.16
Basic Earnings per Common Share (in dollars per share)	1.58	0.13	0.92	2.05	1.42	2.47	1.44	1.77	$ 4.68	$ 7.09	$ 6.32
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations									$ 796	$ 1,054	$ 955
Less: Allocation of earnings to net restricted stock awards									(2)	(2)	(2)
Net income from continuing operations available to common shareholders — diluted									794	1,052	953
Net Income Attributable to DTE Energy Company — discontinued operations									111	314	214
Net income available to common shareholders — diluted									$ 905	$ 1,366	$ 1,167
Average number of common shares outstanding — basic (in shares)									193.0	193.0	185.0
Average dilutive equity units and performance share awards (in shares)									1.0	0.0	0.0
Average number of common shares outstanding — diluted (in shares)									194.0	193.0	185.0
Income from continuing operations (in dollars per share)	1.55	0.30	0.60	1.65	1.08	1.92	1.06	1.39	$ 4.10	$ 5.45	$ 5.15
Income from discontinued operations (in dollars per share)	0.02	(0.17)	0.32	0.40	0.34	0.54	0.38	0.37	0.57	1.63	1.16
Diluted Earnings per Common Share (in dollars per share)	$ 1.57	$ 0.13	$ 0.92	$ 2.05	$ 1.42	$ 2.46	$ 1.44	$ 1.76	$ 4.67	$ 7.08	$ 6.31
Antidilutive securities excluded from computation of earnings per share (in shares)									11.5	10.3	10.3