v3.25.4

Financings and Capitalization (Major Long-Term Debt Issuances and Retirements) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 USD ($)
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 3,458
Repayments of debt | 850
Consumers Energy Company |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | 1,125
First mortgage bonds | 4.500% First Mortgage Bonds Due January 2031 | Consumers Energy Company |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 500
Interest Rate (%) | 4.50%
First mortgage bonds | 5.050% First Mortgage Bonds Due May 2035 | Consumers Energy Company |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 625
Interest Rate (%) | 5.05%
CMS Energy |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 2,110
Repayments of debt | 850
CMS Energy | Junior subordinated notes | 6.500% Junior Subordinated Notes Due June 2055 |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 1,000
Interest Rate (%) | 6.50%
CMS Energy | Term loan facility | Term Loan Facility Due December 2025 |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 110
Repayments of debt | 200
CMS Energy | Term loan facility | Term Loan Facility Due September 2025 |
Debt Instrument [Line Items] |
Repayments of debt | 400
CMS Energy | Convertible debt | 3.125% Convertible Notes Due May 2031 |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 1,000
Interest Rate (%) | 3.125%
CMS Energy | Senior Notes | 3.600% Senior Notes Due November 2025 |
Debt Instrument [Line Items] |
Interest Rate (%) | 3.60%
Repayments of debt | $ 250
NorthStar Clean Energy, Including Subsidiaries |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | 223
NorthStar Clean Energy, Including Subsidiaries | Construction financing agreement | Construction Financing Agreement |
Debt Instrument [Line Items] |
Principal Debt Issuances (In Millions) | $ 223

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