v3.26.1
Segment and Related Information (Inter-segment Billing for Goods and Services) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Operating revenues $ (3,369) $ (3,419) $ (8,510) $ (7,859)
Inter-segment billing relating to Non-utility operations (1,325) (1,440) (3,843) (3,573)
Reclassifications and Eliminations        
Segment Reporting [Line Items]        
Operating revenues 74 76 187 185
Inter-segment billing relating to Non-utility operations 52 57 139 143
Reclassifications and Eliminations | Electric segment        
Segment Reporting [Line Items]        
Operating revenues 16 17 35 36
Inter-segment billing relating to Non-utility operations 1 1 2 2
Reclassifications and Eliminations | Gas segment        
Segment Reporting [Line Items]        
Operating revenues 6 4 14 8
Reclassifications and Eliminations | DTE Vantage segment        
Segment Reporting [Line Items]        
Operating revenues 13 11 49 51
Reclassifications and Eliminations | Energy Trading segment        
Segment Reporting [Line Items]        
Operating revenues $ 39 $ 44 $ 89 $ 90