XML 38 R20.htm IDEA: XBRL DOCUMENT
v3.25.3

Financial Instruments | 9 Months Ended
--- | ---
Sep. 30, 2025
Financial Instruments [Line Items] |
Financial Instruments | Financial Instruments Presented in the following table are the carrying amounts and fair values, by level within the fair value hierarchy, of CMS Energy’s and Consumers’ financial instruments that are not recorded at fair value. The table excludes cash, cash equivalents, short-term financial instruments, and trade accounts receivable and payable whose carrying amounts approximate their fair values. For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 4, Fair Value Measurements.
In Millions
| September 30, 2025 |  | December 31, 2024
| 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 |  | $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 2 |  | 17,930 |  |  | 16,993 |  |  | 2,111 |  |  | 12,932 |  |  | 1,950 |  |  |  | 16,386 |  |  | 14,876 |  |  | 1,018 |  |  | 11,952 |  |  | 1,906 |
Long-term payables 3 |  | 8 |  |  | 8 |  |  | — |  |  | — |  |  | 8 |  |  |  | 9 |  |  | 9 |  |  | — |  |  | — |  |  | 9 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
Notes receivable – related party 4 |  | 91 |  |  | 91 |  |  | — |  |  | — |  |  | 91 |  |  |  | 94 |  |  | 94 |  |  | — |  |  | — |  |  | 94 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 5 |  | 12,109 |  |  | 11,132 |  |  | — |  |  | 9,182 |  |  | 1,950 |  |  |  | 11,270 |  |  | 9,940 |  |  | — |  |  | 8,034 |  |  | 1,906 |
Long-term debt – related party 6 |  | 1,005 |  |  | 674 |  |  | — |  |  | 674 |  |  | — |  |  |  | 823 |  |  | 549 |  |  | — |  |  | 549 |  |  | — |
Long-term payables |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | 2 |  |  |  | 4 |  |  | 4 |  |  | — |  |  | — |  |  | 4 |
1 Includes current portion of long-term accounts receivable and notes receivable of $3 million at September 30, 2025 and $4 million at December 31, 2024. 2 Includes current portion of long-term debt of $1.2 billion at September 30, 2025 and December 31, 2024. 3 Includes current portion of long-term payables of $1 million at September 30, 2025 and $2 million at December 31, 2024. 4 Includes current portion of notes receivable – related party of $7 million at September 30, 2025 and December 31, 2024. 5 Includes current portion of long-term debt of $572 million at September 30, 2025 and $452 million at December 31, 2024. 6 For more information on CMS Energy’s repurchases of Consumers’ first mortgage bonds, see Note 3, Financings and Capitalization—CMS Energy’s Purchase of Consumers’ First Mortgage Bonds. Notes receivable – related party represents Consumers’ portion of the DB SERP demand note payable issued by CMS Energy to the DB SERP rabbi trust. The demand note bears interest at an annual rate of 4.10 percent and has a maturity date of 2028.
Consumers Energy Company |
Financial Instruments [Line Items] |
Financial Instruments | Financial Instruments Presented in the following table are the carrying amounts and fair values, by level within the fair value hierarchy, of CMS Energy’s and Consumers’ financial instruments that are not recorded at fair value. The table excludes cash, cash equivalents, short-term financial instruments, and trade accounts receivable and payable whose carrying amounts approximate their fair values. For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 4, Fair Value Measurements.
In Millions
| September 30, 2025 |  | December 31, 2024
| 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 |  | $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 2 |  | 17,930 |  |  | 16,993 |  |  | 2,111 |  |  | 12,932 |  |  | 1,950 |  |  |  | 16,386 |  |  | 14,876 |  |  | 1,018 |  |  | 11,952 |  |  | 1,906 |
Long-term payables 3 |  | 8 |  |  | 8 |  |  | — |  |  | — |  |  | 8 |  |  |  | 9 |  |  | 9 |  |  | — |  |  | — |  |  | 9 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables 1 |  | $ | 7 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |
Notes receivable – related party 4 |  | 91 |  |  | 91 |  |  | — |  |  | — |  |  | 91 |  |  |  | 94 |  |  | 94 |  |  | — |  |  | — |  |  | 94 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt 5 |  | 12,109 |  |  | 11,132 |  |  | — |  |  | 9,182 |  |  | 1,950 |  |  |  | 11,270 |  |  | 9,940 |  |  | — |  |  | 8,034 |  |  | 1,906 |
Long-term debt – related party 6 |  | 1,005 |  |  | 674 |  |  | — |  |  | 674 |  |  | — |  |  |  | 823 |  |  | 549 |  |  | — |  |  | 549 |  |  | — |
Long-term payables |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | 2 |  |  |  | 4 |  |  | 4 |  |  | — |  |  | — |  |  | 4 |
1 Includes current portion of long-term accounts receivable and notes receivable of $3 million at September 30, 2025 and $4 million at December 31, 2024. 2 Includes current portion of long-term debt of $1.2 billion at September 30, 2025 and December 31, 2024. 3 Includes current portion of long-term payables of $1 million at September 30, 2025 and $2 million at December 31, 2024. 4 Includes current portion of notes receivable – related party of $7 million at September 30, 2025 and December 31, 2024. 5 Includes current portion of long-term debt of $572 million at September 30, 2025 and $452 million at December 31, 2024. 6 For more information on CMS Energy’s repurchases of Consumers’ first mortgage bonds, see Note 3, Financings and Capitalization—CMS Energy’s Purchase of Consumers’ First Mortgage Bonds. Notes receivable – related party represents Consumers’ portion of the DB SERP demand note payable issued by CMS Energy to the DB SERP rabbi trust. The demand note bears interest at an annual rate of 4.10 percent and has a maturity date of 2028.

X
- Definition The entire disclosure of the fair value of financial instruments and investments in debt and equity securities. + References No definition available. + Details
Name: | cms_FairValueOfFinancialInstrumentsAndInvestmentsInDebtAndEquitySecuritiesTextBlock
Namespace Prefix: | cms_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financial Instruments [Line Items] + References No definition available. + Details
Name: | cms_FinancialInstrumentsLineItems
Namespace Prefix: | cms_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=cms_ConsumersEnergyCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |