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v3.25.2

Financings and Capitalization (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 | Jun. 30, 2025 | Dec. 31, 2023
Financing And Capitalization [Line Items] |  |  |
Notes payable | $ 65 | $ 0 |
Limitation on payment of stock dividends |  | 8,200 |
Dividends paid |  | 416 |
Stock offering program maximum value |  |  | $ 1,000
Consumers Energy Company |  |  |
Financing And Capitalization [Line Items] |  |  |
Notes payable | 65 | 0 |
Unrestricted retained earnings |  | 2,400 |
Consumers Energy Company | Credit Agreement | Related Party |  |  |
Financing And Capitalization [Line Items] |  |  |
Maximum borrowing capacity | $ 500 |  |
Basis spread on variable rate | (0.10%) |  |
Notes payable |  | $ 0 |
NorthStar Clean Energy |  |  |
Financing And Capitalization [Line Items] |  |  |
Supplier financing program, payment period |  | 135 days |
Supplier financing program, termination period |  | 30 days |
NorthStar Clean Energy | NorthStar Clean Energy's Supplier Financing Program |  |  |
Financing And Capitalization [Line Items] |  |  |
Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration] |  | Accounts payable |
Supplier finance obligations |  | $ 43 |
Commercial Paper | Consumers Energy Company |  |  |
Financing And Capitalization [Line Items] |  |  |
Short-term debt authorized borrowings |  | 500 |
Short-term borrowings outstanding |  | $ 0 |

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