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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following is a reconciliation of DTE Energy's basic and diluted income per share calculation:
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company$419 $477 $1,093 $1,112 
Less: Allocation of earnings to net restricted stock awards1 2 3 3 
Net income available to common shareholders — basic$418 $475 $1,090 $1,109 
Average number of common shares outstanding — basic207 207 207 207 
Basic Earnings per Common Share$2.02 $2.30 $5.26 $5.37 
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company$419 $477 $1,093 $1,112 
Less: Allocation of earnings to net restricted stock awards1 2 3 3 
Net income available to common shareholders — diluted$418 $475 $1,090 $1,109 
Average number of common shares outstanding — diluted207 207 207 207 
Diluted Earnings per Common Share
$2.01 $2.30 $5.26 $5.36