Consolidated Statements of Comprehensive Income (Unaudited) - DTE Energy Company - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 332	$ 387	$ 978	$ 818
Other comprehensive income (loss), net of tax:
Benefit obligations, net of taxes of $—, $—, $1, and $2, respectively	1	2	2	7
Net unrealized gains on derivatives, net of taxes of $4, $1, $5, and $2, respectively	15	4	17	7
Foreign currency translation	(3)	0	(1)	0
Other comprehensive income	13	6	18	14
Comprehensive Income	$ 345	$ 393	$ 996	$ 832