Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Basic Earnings per Share
Net Income Attributable to DTE Energy Company	$ 332	$ 387	$ 978	$ 818
Less: Allocation of earnings to net restricted stock awards	0	1	2	2
Net income available to common shareholders — basic	$ 332	$ 386	$ 976	$ 816
Average number of common shares outstanding — basic (in shares)	206.0	193.0	206.0	193.0
Basic Earnings per Common Share (in dollars per share)	$ 1.61	$ 2.00	$ 4.74	$ 4.22
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company	$ 332	$ 387	$ 978	$ 818
Less: Allocation of earnings to net restricted stock awards	0	1	2	2
Net income available to common shareholders — diluted	$ 332	$ 386	$ 976	$ 816
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
Diluted Earnings per Common Share (in dollars per share)	$ 1.61	$ 1.99	$ 4.74	$ 4.21
Antidilutive securities excluded from computation of earnings per share (in shares)		10.1		10.2