Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Basic Earnings per Share
Net Income Attributable to DTE Energy Company	$ 322	$ 201	$ 635	$ 646
Less: Allocation of earnings to net restricted stock awards	0	1	1	2
Net income available to common shareholders — basic	$ 322	$ 200	$ 634	$ 644
Average number of common shares outstanding — basic (in shares)	207	206	206	206
Basic Earnings per Common Share (in dollars per share)	$ 1.56	$ 0.97	$ 3.07	$ 3.13
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company	$ 322	$ 201	$ 635	$ 646
Less: Allocation of earnings to net restricted stock awards	0	1	1	2
Net income available to common shareholders — diluted	$ 322	$ 200	$ 634	$ 644
Average number of common shares outstanding — basic (in shares)	207	206	206	206
Average performance share awards (in shares)	0	0	1	0
Average number of common shares outstanding — diluted (in shares)	207	206	207	206
Diluted Earnings per Common Share (in dollars per share)	$ 1.55	$ 0.97	$ 3.06	$ 3.13