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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Financial Instruments [Line Items] |
Schedule of Carrying Amounts and Fair Values of Financial Instruments | For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 5, Fair Value Measurements.
In Millions
| December 31, 2023 |  | December 31, 2022
| Carrying Amount | Fair Value |  | Carrying Amount | Fair Value
| Total | Level |  | Total | Level
| 1 | 2 | 3 |  | 1 | 2 | 3
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 11 |  |  | $ | 11 |  |  | $ | — |  |  | $ | — |  |  | $ | 11 |  |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | — |  |  | $ | — |  |  | $ | 14 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 2 |  | 15,483 |  |  | 14,305 |  |  | 1,103 |  |  | 11,186 |  |  | 2,016 |  |  |  | 14,212 |  |  | 12,384 |  |  | 987 |  |  | 8,741 |  |  | 2,656 |
Long-term payables 3 |  | 11 |  |  | 11 |  |  | — |  |  | — |  |  | 11 |  |  |  | 9 |  |  | 7 |  |  | — |  |  | — |  |  | 7 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 11 |  |  | $ | 11 |  |  | $ | — |  |  | $ | — |  |  | $ | 11 |  |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | — |  |  | $ | — |  |  | $ | 14 |
Notes receivable – related party 4 |  | 97 |  |  | 97 |  |  | — |  |  | — |  |  | 97 |  |  |  | 101 |  |  | 101 |  |  | — |  |  | — |  |  | 101 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 5 |  | 10,762 |  |  | 9,757 |  |  | — |  |  | 7,741 |  |  | 2,016 |  |  |  | 10,183 |  |  | 8,728 |  |  | — |  |  | 6,172 |  |  | 2,556 |
Long-term debt – related party |  | 424 |  |  | 303 |  |  | — |  |  | 303 |  |  | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Long-term payables |  | 5 |  |  | 5 |  |  | — |  |  | — |  |  | 5 |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
1 Includes current portion of long-term accounts receivable and notes receivable of $6 million at December 31, 2023 and $7 million at December 31, 2022. 2 Includes current portion of long-term debt of $975 million at December 31, 2023 and $1,090 million at December 31, 2022. 3 Includes current portion of long-term payables of $2 million at December 31, 2022. 4 Includes current portion of notes receivable – related party of $7 million at December 31, 2023 and 2022. 5 Includes current portion of long-term debt of $725 million at December 31, 2023 and $991 million at December 31, 2022.
Consumers Energy Company |
Financial Instruments [Line Items] |
Schedule of Carrying Amounts and Fair Values of Financial Instruments | For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 5, Fair Value Measurements.
In Millions
| December 31, 2023 |  | December 31, 2022
| Carrying Amount | Fair Value |  | Carrying Amount | Fair Value
| Total | Level |  | Total | Level
| 1 | 2 | 3 |  | 1 | 2 | 3
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 11 |  |  | $ | 11 |  |  | $ | — |  |  | $ | — |  |  | $ | 11 |  |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | — |  |  | $ | — |  |  | $ | 14 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 2 |  | 15,483 |  |  | 14,305 |  |  | 1,103 |  |  | 11,186 |  |  | 2,016 |  |  |  | 14,212 |  |  | 12,384 |  |  | 987 |  |  | 8,741 |  |  | 2,656 |
Long-term payables 3 |  | 11 |  |  | 11 |  |  | — |  |  | — |  |  | 11 |  |  |  | 9 |  |  | 7 |  |  | — |  |  | — |  |  | 7 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 11 |  |  | $ | 11 |  |  | $ | — |  |  | $ | — |  |  | $ | 11 |  |  |  | $ | 14 |  |  | $ | 14 |  |  | $ | — |  |  | $ | — |  |  | $ | 14 |
Notes receivable – related party 4 |  | 97 |  |  | 97 |  |  | — |  |  | — |  |  | 97 |  |  |  | 101 |  |  | 101 |  |  | — |  |  | — |  |  | 101 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 5 |  | 10,762 |  |  | 9,757 |  |  | — |  |  | 7,741 |  |  | 2,016 |  |  |  | 10,183 |  |  | 8,728 |  |  | — |  |  | 6,172 |  |  | 2,556 |
Long-term debt – related party |  | 424 |  |  | 303 |  |  | — |  |  | 303 |  |  | — |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Long-term payables |  | 5 |  |  | 5 |  |  | — |  |  | — |  |  | 5 |  |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
1 Includes current portion of long-term accounts receivable and notes receivable of $6 million at December 31, 2023 and $7 million at December 31, 2022. 2 Includes current portion of long-term debt of $975 million at December 31, 2023 and $1,090 million at December 31, 2022. 3 Includes current portion of long-term payables of $2 million at December 31, 2022. 4 Includes current portion of notes receivable – related party of $7 million at December 31, 2023 and 2022. 5 Includes current portion of long-term debt of $725 million at December 31, 2023 and $991 million at December 31, 2022.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-11 + Details
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