XML 80 R64.htm IDEA: XBRL DOCUMENT v3.25.1
Fair Value (Fair Value of Financial Instruments) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Carrying amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable $ 963 $ 884
Short-term borrowings 513 1,067
Notes payable 39 37
Long-term debt 22,693 21,963
Carrying amount | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes payable 27 35
Long-term debt 11,518 11,881
Carrying amount | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 42
Short-term borrowings 960 0
Carrying amount | DTE Electric | Customer/ Other    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 35 2
Short-term borrowings 513 666
Fair value | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 0 0
Notes payable 0 0
Long-term debt 714 725
Fair value | Level 1 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes payable 0 0
Long-term debt 0 0
Fair value | Level 1 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 0 0
Fair value | Level 1 | DTE Electric | Customer/ Other    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 0 0
Fair value | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 513 1,067
Notes payable 0 0
Long-term debt 19,248 18,283
Fair value | Level 2 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes payable 0 0
Long-term debt 10,218 10,449
Fair value | Level 2 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 0 0
Fair value | Level 2 | DTE Electric | Customer/ Other    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 513 666
Fair value | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 963 904
Short-term borrowings 0 0
Notes payable 39 37
Long-term debt 1,156 1,128
Fair value | Level 3 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes payable 27 35
Long-term debt 133 127
Fair value | Level 3 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 42
Short-term borrowings 960 0
Fair value | Level 3 | DTE Electric | Customer/ Other    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 35 2
Short-term borrowings $ 0 $ 0