v3.25.4

Financial Instruments (Schedule of Carrying Amounts and Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Liabilities |  |
Current accounts receivable and notes receivable | $ 3 | $ 4
Current portion of long-term debt | 950 | 1,192
Current portion of long-term payables | 2 | 2
Carrying Amount |  |
Assets |  |
Long-term receivables | 7 | 9
Liabilities |  |
Long-term debt | 18,757 | 16,386
Long-term payables | 7 | 9
Fair Value |  |
Assets |  |
Long-term receivables | 6 | 8
Liabilities |  |
Long-term debt | 17,645 | 14,876
Long-term payables | 7 | 9
Consumers Energy Company |  |
Liabilities |  |
Current accounts receivable and notes receivable | 3 | 4
Current portion of long-term debt | 573 | 452
Consumers Energy Company | Related Party |  |
Liabilities |  |
Notes receivable | 7 | 7
Consumers Energy Company | Carrying Amount |  |
Assets |  |
Long-term receivables | 7 | 9
Notes receivable related party | 90 | 94
Liabilities |  |
Long-term payables | 2 | 4
Consumers Energy Company | Carrying Amount | Nonrelated Party |  |
Liabilities |  |
Long-term debt | 12,097 | 11,270
Consumers Energy Company | Carrying Amount | Related Party |  |
Liabilities |  |
Long-term debt | 1,005 | 823
Consumers Energy Company | Fair Value |  |
Assets |  |
Long-term receivables | 6 | 8
Notes receivable related party | 90 | 94
Liabilities |  |
Long-term payables | 2 | 4
Consumers Energy Company | Fair Value | Nonrelated Party |  |
Liabilities |  |
Long-term debt | 11,031 | 9,940
Consumers Energy Company | Fair Value | Related Party |  |
Liabilities |  |
Long-term debt | 657 | 549
Level 1 | Fair Value |  |
Assets |  |
Long-term receivables | 0 | 0
Liabilities |  |
Long-term debt | 2,042 | 1,018
Long-term payables | 0 | 0
Level 1 | Consumers Energy Company | Fair Value |  |
Assets |  |
Long-term receivables | 0 | 0
Notes receivable related party | 0 | 0
Liabilities |  |
Long-term payables | 0 | 0
Level 1 | Consumers Energy Company | Fair Value | Nonrelated Party |  |
Liabilities |  |
Long-term debt | 0 | 0
Level 1 | Consumers Energy Company | Fair Value | Related Party |  |
Liabilities |  |
Long-term debt | 0 | 0
Level 2 | Fair Value |  |
Assets |  |
Long-term receivables | 0 | 0
Liabilities |  |
Long-term debt | 13,663 | 11,952
Long-term payables | 0 | 0
Level 2 | Consumers Energy Company | Fair Value |  |
Assets |  |
Long-term receivables | 0 | 0
Notes receivable related party | 0 | 0
Liabilities |  |
Long-term payables | 0 | 0
Level 2 | Consumers Energy Company | Fair Value | Nonrelated Party |  |
Liabilities |  |
Long-term debt | 9,091 | 8,034
Level 2 | Consumers Energy Company | Fair Value | Related Party |  |
Liabilities |  |
Long-term debt | 657 | 549
Level 3 | Fair Value |  |
Assets |  |
Long-term receivables | 6 | 8
Liabilities |  |
Long-term debt | 1,940 | 1,906
Long-term payables | 7 | 9
Level 3 | Consumers Energy Company | Fair Value |  |
Assets |  |
Long-term receivables | 6 | 8
Notes receivable related party | 90 | 94
Liabilities |  |
Long-term payables | 2 | 4
Level 3 | Consumers Energy Company | Fair Value | Nonrelated Party |  |
Liabilities |  |
Long-term debt | 1,940 | 1,906
Level 3 | Consumers Energy Company | Fair Value | Related Party |  |
Liabilities |  |
Long-term debt | $ 0 | $ 0

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