Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic Earnings per Share
Net Income Attributable to DTE Energy Company	$ 445	$ 394
Less: Allocation of earnings to net restricted stock awards	1	1
Net income available to common shareholders — basic	$ 444	$ 393
Average number of common shares outstanding — basic (in shares)	206.0	193.0
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 2.16	$ 2.03
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company	$ 445	$ 394
Less: Allocation of earnings to net restricted stock awards	1	1
Net income available to common shareholders — diluted	$ 444	$ 393
Average number of common shares outstanding — basic (in shares)	206.0	193.0
Average performance share awards (in shares)	0.0	1.0
Average number of common shares outstanding — diluted (in shares)	206.0	194.0
Net Income Attributable to DTE Energy Company (in dollars per share)	$ 2.16	$ 2.03
Antidilutive securities excluded from computation of earnings per share (in shares)		10.7