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Stock-Based Compensation (Details Textuals) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Remaining contractual life for exercisable shares     3 years 20 days  
Intrinsic value     $ 7,000,000 $ 7,000,000
Stock option plan expense     0 0
Unrecognized compensation cost $ 60,000,000   $ 60,000,000  
Weighted average period for unrecognized compensation cost to be recognized     1 year 2 months 22 days  
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Vesting period     3 years  
DTE Electric | DTE Energy        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock-based compensation $ 7,000,000 $ 14,000,000 $ 20,000,000 $ 43,000,000