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v3.23.2

Financings and Capitalization (Major Long-Term Debt Issuances and Retirements) (Details) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2023 | May 31, 2023 | Dec. 31, 2022
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 2,410 |  |
CMS Energy |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | 800 |  |
NorthStar Clean Energy, Including Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | 85 |  |
Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | 1,525 |  |
Convertible debt | 3.375% Convertible Senior Notes Due 2028 | CMS Energy |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 800 | $ 800 |
Interest rate | 3.375% | 3.375% |
Term loan facility | Term Loan Facility Due 2023 | NorthStar Clean Energy, Including Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 85 |  |
Interest rate | 6.102% |  |
Maximum borrowing capacity |  |  | $ 185
Total principal amount outstanding | $ 185 |  |
Term loan facility | Term Loan Facility Due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of debt | 1,000 |  |
First mortgage bonds | 4.650% First Mortgage Bonds Due March 2028 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 425 |  |
Interest rate | 4.65% |  |
First mortgage bonds | 4.625% First Mortgage Bonds Due May 2033 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 700 |  |
Interest rate | 4.625% |  |
First mortgage bonds | 5.240% First Mortgage Bonds Due May 2026 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 115 |  |
Interest rate | 5.24% |  |
First mortgage bonds | 5.070% First Mortgage Bonds Due May 2029 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 50 |  |
Interest rate | 5.07% |  |
First mortgage bonds | 5.170% First Mortgage Bonds Due May 2032 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 95 |  |
Interest rate | 5.17% |  |
First mortgage bonds | 5.380% First Mortgage Bonds Due May 2037 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Principal (In Millions) | $ 140 |  |
Interest rate | 5.38% |  |
First mortgage bonds | 0.350% First Mortgage Bonds Due 2023 | Consumers Energy Company |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of debt | $ 300 |  |
Interest rate | 0.35% |  |

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