v3.25.4

Financings and Capitalization (Schedule of Revolving Credit Facilities) (Details) | 12 Months Ended
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Dec. 31, 2025 USD ($)
Consumers Energy Company | Secured Revolving Credit Facility, Expiring November 2030 |
Line of Credit Facility [Line Items] |
Amount of Facility | $ 1,100,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 6,000,000
Amount Available | 1,094,000,000
Consumers Energy Company | Secured Revolving Credit Facility, Expiring November 2028 |
Line of Credit Facility [Line Items] |
Amount of Facility | 300,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 0
Amount Available | 300,000,000
Consumers Energy Company | Secured Letter Of Credit Facility, Expiring May 2027 |
Line of Credit Facility [Line Items] |
Amount of Facility | 100,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 100,000,000
Amount Available | 0
Consumers Energy Company | Unsecured Letter Of Credit Facility, Expiring March 2028 |
Line of Credit Facility [Line Items] |
Amount of Facility | 50,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 43,000,000
Amount Available | 7,000,000
Consumers Energy Company | Unsecured Letter Of Credit Facility |
Line of Credit Facility [Line Items] |
Amount of Facility | 100,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 97,000,000
Amount Available | 3,000,000
Consumers Energy Company | Unsecured Letter Of Credit Facility |
Line of Credit Facility [Line Items] |
Amount of Facility | 100,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 100,000,000
Amount Available | 0
Consumers Energy Company | Letter of Credit |
Line of Credit Facility [Line Items] |
Borrowings | 0
CMS Energy | Unsecured Revolving Credit Facility, Expiring November 2030 |
Line of Credit Facility [Line Items] |
Amount of Facility | 750,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 35,000,000
Amount Available | 715,000,000
Borrowings | 0
CMS Energy | Unsecured Letter Of Credit Facility, Expiring September 2026 |
Line of Credit Facility [Line Items] |
Amount of Facility | 50,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 50,000,000
Amount Available | 0
NorthStar Clean Energy, Including Subsidiaries | Secured Revolving Credit Facility, Expiring May 2028 |
Line of Credit Facility [Line Items] |
Amount of Facility | 250,000,000
Amount Borrowed | 235,000,000
Letters of Credit Outstanding | 10,000,000
Amount Available | 5,000,000
Equity interests | 514,000,000
NorthStar Clean Energy, Including Subsidiaries | Secured Letter Of Credit Facility, Expiring September 2028 |
Line of Credit Facility [Line Items] |
Amount of Facility | 37,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 37,000,000
Amount Available | 0
NorthStar Clean Energy, Including Subsidiaries | Secured Letter Of Credit Facility |
Line of Credit Facility [Line Items] |
Amount of Facility | 19,000,000
Amount Borrowed | 0
Letters of Credit Outstanding | 12,000,000
Amount Available | $ 7,000,000

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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