Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Basic Earnings per Share
Net Income Attributable to DTE Energy Company	$ 201	$ 37	$ 646	$ 431
Less: Allocation of earnings to net restricted stock awards	1	0	2	1
Net income available to common shareholders — basic	$ 200	$ 37	$ 644	$ 430
Average number of common shares outstanding — basic (in shares)	206.0	193.0	206.0	193.0
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 0.97	$ 0.19	$ 3.13	$ 2.22
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company	$ 201	$ 37	$ 646	$ 431
Less: Allocation of earnings to net restricted stock awards	1	0	2	1
Net income available to common shareholders — diluted	$ 200	$ 37	$ 644	$ 430
Average number of common shares outstanding — basic (in shares)	206.0	193.0	206.0	193.0
Average performance share awards (in shares)	0.0	1.0	0.0	1.0
Average number of common shares outstanding — diluted (in shares)	206.0	194.0	206.0	194.0
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 0.97	$ 0.19	$ 3.13	$ 2.22
Antidilutive securities excluded from computation of earnings per share (in shares)		10.0		10.3