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Long-Term Debt (Details Textuals)
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
May 31, 2023
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2023
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Nov. 01, 2023
USD ($)
tranche
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Debt Instrument [Line Items]                    
Current portion of long-term debt           $ 594,000,000       $ 1,124,000,000
Face amount issued           2,300,000,000        
Retirement of debt           1,146,000,000 $ 316,000,000      
DTE Electric                    
Debt Instrument [Line Items]                    
Current portion of long-term debt           542,000,000       $ 248,000,000
Retirement of debt           $ 121,000,000 $ 316,000,000      
DTE Electric | Forecast                    
Debt Instrument [Line Items]                    
Retirement of debt         $ 300,000,000          
DTE Electric | Forecast | Parent                    
Debt Instrument [Line Items]                    
Payment of special dividend         $ 300,000,000          
Unsecured term loan | June 2022 Unsecured Term Loan                    
Debt Instrument [Line Items]                    
Unused loan capacity       $ 1,125,000,000            
Current portion of long-term debt                 $ 1,000,000,000  
Unused loan capacity terminated   $ 125,000,000                
Face amount issued                 $ 200,000,000  
Retirement of debt   $ 200,000,000 $ 800,000,000              
Unsecured term loan | June 2022 Unsecured Term Loan | SOFR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       0.90%            
Mortgage Bonds | 5.57% First Mortgage Bonds due in 2030 | DTE Gas | Subsequent Event                    
Debt Instrument [Line Items]                    
Face amount issued $ 150,000,000                  
Interest rate 5.57%                  
Mortgage Bonds | 5.73% First Mortgage Bonds due in 2035 | DTE Gas | Subsequent Event                    
Debt Instrument [Line Items]                    
Face amount issued $ 145,000,000                  
Interest rate 5.73%                  
Senior Notes | 5.19% 2005 Series C Senior Notes | DTE Electric | Subsequent Event                    
Debt Instrument [Line Items]                    
Interest rate 5.19%                  
Retirement of debt $ 100,000,000                  
Securitization Bonds | DTE Electric | Subsequent Event                    
Debt Instrument [Line Items]                    
Face amount issued               $ 602,000,000    
Number of tranches | tranche               2    
Securitization Bonds | 5.97% Securitization Bonds due in 2033 | DTE Electric | Subsequent Event                    
Debt Instrument [Line Items]                    
Face amount issued               $ 301,000,000    
Interest rate               5.97%    
Securitization Bonds | 6.09% Securitization Bonds due in 2038 | DTE Electric | Subsequent Event                    
Debt Instrument [Line Items]                    
Face amount issued               $ 301,000,000    
Interest rate               6.09%