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Contingencies and Commitments (Schedule of Contractual Purchase Obligations) (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Guarantees And Other Contingencies [Line Items] |
Total | $ 10,695
2024 | 2,431
2025 | 1,677
2026 | 1,084
2027 | 994
2028 | 852
Beyond 2028 | 3,657
Consumers Energy Company |
Guarantees And Other Contingencies [Line Items] |
Total | 10,006
2024 | 2,326
2025 | 1,440
2026 | 1,049
2027 | 955
2028 | 784
Beyond 2028 | 3,452
Total PPAs | Consumers Energy Company |
Guarantees And Other Contingencies [Line Items] |
Total | 7,204
2024 | 711
2025 | 792
2026 | 783
2027 | 787
2028 | 702
Beyond 2028 | 3,429
Other |
Guarantees And Other Contingencies [Line Items] |
Total | 3,491
2024 | 1,720
2025 | 885
2026 | 301
2027 | 207
2028 | 150
Beyond 2028 | 228
Other | Consumers Energy Company |
Guarantees And Other Contingencies [Line Items] |
Total | 2,802
2024 | 1,615
2025 | 648
2026 | 266
2027 | 168
2028 | 82
Beyond 2028 | 23
MCV PPA | Consumers Energy Company |
Guarantees And Other Contingencies [Line Items] |
Total | 2,506
2024 | 342
2025 | 402
2026 | 416
2027 | 410
2028 | 371
Beyond 2028 | 565
Related-party PPAs | Consumers Energy Company |
Guarantees And Other Contingencies [Line Items] |
Total | 206
2024 | 60
2025 | 44
2026 | 30
2027 | 31
2028 | 14
Beyond 2028 | 27
Other PPAs | Consumers Energy Company |
Guarantees And Other Contingencies [Line Items] |
Total | 4,492
2024 | 309
2025 | 346
2026 | 337
2027 | 346
2028 | 317
Beyond 2028 | $ 2,837

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