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Long-Term Debt (Schedule of Issued Debt) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2022
Mar. 31, 2022
Mar. 31, 2021
Mar. 17, 2022
Feb. 28, 2022
Debt Instrument [Line Items]          
Amount $ 1,136 $ 1,136      
Redemption of long-term debt   250 $ 0    
DTE Electric          
Debt Instrument [Line Items]          
Redemption of long-term debt   $ 250 $ 0    
DTE Electric | Parent          
Debt Instrument [Line Items]          
Payments of special dividend 115        
DTE Electric | Mortgage Bonds | February 2022 3.00% Mortgage Bonds Maturing in 2032          
Debt Instrument [Line Items]          
Interest rate         3.00%
Amount         $ 500
DTE Electric | Mortgage Bonds | February 2022 3.65% Mortgage Bonds Maturing In 2052          
Debt Instrument [Line Items]          
Interest rate         3.65%
Amount         $ 400
DTE Electric | Mortgage Bonds | 2012 Series A Mortgage Bonds          
Debt Instrument [Line Items]          
Redemption of long-term debt $ 115        
DTE Electric | Securitization Bonds          
Debt Instrument [Line Items]          
Amount       $ 236  
DTE Electric | Securitization Bonds | March 2022 2.64% Securitization Bonds Due 2027          
Debt Instrument [Line Items]          
Interest rate 2.64% 2.64%      
Amount $ 184 $ 184      
DTE Electric | Securitization Bonds | March 2022 3.11% Securitization Bonds Due 2036          
Debt Instrument [Line Items]          
Interest rate 3.11% 3.11%      
Amount $ 52 $ 52