Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Basic Earnings per Share
Net Income (Loss) Attributable to DTE Energy Company	$ 1,462	$ 1,404	$ 1,397
Less: Allocation of earnings to net restricted stock awards	3	3	3
Net income available to common shareholders — basic	$ 1,459	$ 1,401	$ 1,394
Average number of common shares outstanding — basic (in shares)	207	207	206
Basic Earnings per Common Share (in dollars per share)	$ 7.04	$ 6.78	$ 6.77
Diluted Earnings per Share
Net Income (Loss) Attributable to DTE Energy Company	$ 1,462	$ 1,404	$ 1,397
Less: Allocation of earnings to net restricted stock awards	3	3	3
Net income available to common shareholders — diluted	$ 1,459	$ 1,401	$ 1,394
Average number of common shares outstanding — diluted (in shares)	207	207	206
Diluted Earnings per Common Share (in dollars per share)	$ 7.03	$ 6.77	$ 6.76