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Stock-Based Compensation (Details Textuals)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized limit of common stock shares (in shares) 16,500,000    
Performance units price per unit (in dollars per share) 1.00    
DTE Electric | DTE Energy      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost charged against income (in millions) | $ $ 37 $ 43 $ 38
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 500,000    
Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 150,000    
Award vesting period 3 years    
Compensation cost charged against income (in millions) | $ $ 13 $ 11 $ 11
Performance Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 300,000    
Award vesting period 3 years    
Performance Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 1,000,000