Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic Earnings per Share
Net Income Attributable to DTE Energy Company	$ 313	$ 445
Less: Allocation of earnings to net restricted stock awards	1	1
Net income available to common shareholders — basic	$ 312	$ 444
Average number of common shares outstanding — basic (in shares)	206	206
Basic Earnings per Common Share (in dollars per share)	$ 1.51	$ 2.16
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company	$ 313	$ 445
Less: Allocation of earnings to net restricted stock awards	1	1
Net income available to common shareholders — diluted	$ 312	$ 444
Average number of common shares outstanding — basic (in shares)	206	206
Average performance share awards (in shares)	1	0
Average number of common shares outstanding — diluted (in shares)	207	206
Diluted Earnings per Common Share (in dollars per share)	$ 1.51	$ 2.16