XML 36 R18.htm IDEA: XBRL DOCUMENT
v3.25.3

Financings and Capitalization | 9 Months Ended
--- | ---
Sep. 30, 2025
Debt Instrument [Line Items] |
Financings and Capitalization | Financings and Capitalization Financings: Presented in the following table is a summary of major long-term debt issuances during the nine months ended September 30, 2025:
| Principal (In Millions) | Interest Rate (%) | Issuance Date | Maturity Date
CMS Energy, parent only |  |  |  |  |
Junior subordinated notes 1 |  | $ | 1,000 |  | 6.500 |  | February 2025 | June 2055
Term loan credit agreement |  | 110 |  | variable | February 2025 | December 2025
Total CMS Energy, parent only |  | $ | 1,110 |  |  |  |
NorthStar Clean Energy, including subsidiaries |  |  |  |  |
Construction financing agreement 2 |  | $ | 179 |  | variable | February 2025 | Five years after conversion date 2
Total NorthStar Clean Energy, including subsidiaries |  | $ | 179 |  |  |  |
Consumers |  |  |  |  |
First mortgage bonds |  | $ | 500 |  | 4.500 |  | May 2025 | January 2031
First mortgage bonds |  | 625 |  | 5.050 |  | May 2025 | May 2035
Total Consumers |  | $ | 1,125 |  |  |  |
Total CMS Energy |  | $ | 2,414 |  |  |  |
1 These unsecured obligations rank subordinate and junior in right of payment to all of CMS Energy’s existing and future senior indebtedness. On June 1, 2035, and every five years thereafter, the notes will reset to an interest rate equal to the five-year treasury rate plus 1.961 percent. 2 At completion of project construction, scheduled for the first half of 2026, these financings will convert into a term loan that will mature five years after the conversion date. Retirements: Presented in the following table is a summary of major long-term debt retirements during the nine months ended September 30, 2025:
| Principal (In Millions) | Interest Rate (%) | Retirement Date | Maturity Date
CMS Energy, parent only |  |  |  |  |
Term loan credit agreement |  | $ | 400 |  | variable | February 2025 | September 2025
Term loan credit agreement |  | 200 |  | variable | February 2025 | December 2025
Total CMS Energy, parent only |  | $ | 600 |  |  |  |
Total CMS Energy |  | $ | 600 |  |  |  |
CMS Energy’s Purchase of Consumers’ First Mortgage Bonds: CMS Energy purchased Consumers’ first mortgage bonds with a principal balance of $184 million during the nine months ended September 30, 2025 in exchange for cash of $109 million. On a consolidated basis, CMS Energy’s repurchase of Consumers’ first mortgage bonds was accounted for as a debt extinguishment and resulted in a pre-tax gain of $72 million during the nine months ended September 30, 2025, which was recorded in other income on CMS Energy’s consolidated statements of income. Interest expense related to the repurchased bonds was $8 million for the three months ended September 30, 2025 and $21 million for the nine months ended September 30, 2025, which was recorded in interest expense - related parties on Consumers’ consolidated statements of income. CMS Energy purchased Consumers’ first mortgage bonds with a principal balance of $69 million during the three months ended September 30, 2024 and $311 million during the nine months ended September 30, 2024, in exchange for cash of $49 million and $218 million, respectively. On a consolidated basis, CMS Energy’s repurchase of Consumers’ first mortgage bonds was accounted for as a debt extinguishment and resulted in a pre-tax gain of $20 million for the three months ended September 30, 2024 and a pre-tax gain of $90 million for the nine months ended September 30, 2024, which was recorded in other income on its consolidated statements of income. Interest expense related to the repurchased bonds was $5 million for the three months ended September 30, 2024 and $13 million for the nine months ended September 30, 2024, which was recorded in interest expense - related parties on Consumers’ consolidated statements of income. Credit Facilities: The following credit facilities with banks were available at September 30, 2025:
In Millions
Expiration Date | Amount of Facility | Amount Borrowed | Letters of Credit Outstanding | Amount Available
CMS Energy, parent only |  |  |  |  |  |  |  |
December 14, 2027 1 |  | $ | 550 |  |  | $ | — |  |  | $ | 35 |  |  | $ | 515 |
September 30, 2026 |  | 50 |  |  | — |  |  | 50 |  |  | — |
NorthStar Clean Energy, including subsidiaries |  |  |  |  |  |  |  |
May 30, 2028 2 |  | $ | 250 |  |  | $ | 180 |  |  | $ | 8 |  |  | $ | 62 |
December 25, 2025 3 |  | 37 |  |  | — |  |  | 37 |  |  | — |
Upon completion of construction project 4 |  | 19 |  |  | — |  |  | 12 |  |  | 7 |
Consumers |  |  |  |  |  |  |  |
December 14, 2027 5 |  | $ | 1,100 |  |  | $ | — |  |  | $ | 10 |  |  | $ | 1,090 |
November 18, 2025 5 |  | 250 |  |  | — |  |  | 112 |  |  | 138 |
March 31, 2028 |  | 50 |  |  | — |  |  | 42 |  |  | 8 |
1 There were no borrowings under this facility during the nine months ended September 30, 2025. 2 Obligations under this facility are secured by certain pledged equity interests in subsidiaries of NorthStar Clean Energy; under the terms of this facility, the interests may not be sold by NorthStar Clean Energy unless there is an agreed-upon substitution for the pledged equity interests. At September 30, 2025, the net book value of the pledged equity interests was $515 million. Also under the terms of this facility, NorthStar Clean Energy may be restricted from remitting cash dividends to CMS Energy in the event of default. 3 This letter of credit facility is available to Aviator Wind Equity Holdings. For more information regarding Aviator Wind Equity Holdings, see Note 11, Variable Interest Entities. 4 The letter of credit facility is available to certain subsidiaries of NorthStar Clean Energy. The letter of credit facility will expire upon completion of project construction scheduled for the first half of 2026. 5 Obligations under these facilities are secured by first mortgage bonds of Consumers. There were no borrowings under these facilities during the nine months ended September 30, 2025. Regulatory Authorization for Financings: Consumers is required to maintain FERC authorization for financings. Any long-term issuances during the authorization period are exempt from FERC’s competitive bidding and negotiated placement requirements. Its short-term authorization ends on May 2, 2026. In February 2025, FERC approved Consumers’ application for authority to issue long-term debt securities. The authorization is effective February 21, 2025 through February 20, 2027. Short-term Borrowings: Under Consumers’ commercial paper program, Consumers may issue, in one or more placements, investment-grade commercial paper notes with maturities of up to 365 days at market interest rates. These issuances are supported by Consumers’ revolving credit facilities and may have an aggregate principal amount outstanding of up to $500 million. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity of the facilities. At September 30, 2025, there were no commercial paper notes outstanding under this program. In December 2024, Consumers renewed a short-term credit agreement with CMS Energy, permitting Consumers to borrow up to $500 million at an interest rate of the prior month’s average one‑month Term SOFR minus 0.100 percent. At September 30, 2025, there were no outstanding borrowings under the agreement. NorthStar Clean Energy’s Supplier Financing Program: Under a supplier financing program, NorthStar Clean Energy agrees to pay a bank that is acting as its payment agent the stated amount of confirmed invoices from participating suppliers on the original maturity dates of the invoices. The bank is required to pay the supplier invoices that have been confirmed as valid under the program in full within 135 days of the invoice date. NorthStar Clean Energy does not provide collateral or a guarantee to the bank in support of its payment obligations under the agreement, nor does it pay a fee for the service. NorthStar Clean Energy or the bank may terminate the supplier financing program agreement upon 30 days prior written notice to the other party. At September 30, 2025, obligations under this program accounted for as accounts payable on CMS Energy’s consolidated balance sheets were $79 million. Dividend Restrictions: At September 30, 2025, payment of dividends by CMS Energy on its common stock was limited to $8.6 billion under provisions of the Michigan Business Corporation Act of 1972. Under the provisions of its articles of incorporation, at September 30, 2025, Consumers had $2.5 billion of unrestricted retained earnings available to pay dividends on its common stock to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers’ retained earnings. Several decisions from FERC suggest that, under a variety of circumstances, dividends from Consumers on its common stock would not be limited to amounts in Consumers’ retained earnings. Any decision by Consumers to pay dividends on its common stock in excess of retained earnings would be based on specific facts and circumstances and would be subject to a formal regulatory filing process. During the nine months ended September 30, 2025, Consumers paid $649 million in dividends on its common stock to CMS Energy. Issuance of Common Stock: In 2023, CMS Energy entered into an equity offering program under which it may sell shares of its common stock having an aggregate sales price of up to $1 billion in privately negotiated transactions, in “at the market” offerings, or through forward sales transactions. Under the forward sales transactions, CMS Energy may either settle physically by issuing shares of its common stock at the then-applicable forward sale price specified by the agreement or settle net by delivering or receiving cash or shares. CMS Energy may settle the contracts at any time through their maturity dates, and presently intends to physically settle the contracts by delivering shares of its common stock. During the three months ended September 30, 2025, CMS Energy entered into forward sale agreements for approximately 2.1 million shares at a weighted average initial forward price of $72.42 per share. During the same period, CMS Energy settled forward sale contracts under this program by issuing approximately 5.0 million shares at a weighted average price of $70.52 p er share, resulting in net proceeds o f $349 million. In October 2025, CMS Energy completed an additional settlement issuing approximately 2.0 million shares at a weighted average price of $72.73, resulting in net proceeds of $147 million. Following these transactions, outstanding forward contracts under the program have an aggregate sales price of $8 million, maturing through November 30, 2026. The initial forward price in the forward equity sale contracts includes a deduction for commissions and will be adjusted on a daily basis over the term based on an interest rate factor and decreased on certain dates by certain predetermined amounts to reflect expected dividend payments. No amounts are recorded on CMS Energy’s consolidated balance sheets until settlements of the forward equity sale contracts occur. If CMS Energy had elected to net share settle or net cash settle the contracts as of September 30, 2025, it would have been required to deliver 21,313 shares or pay $2 million in cash.
Consumers Energy Company |
Debt Instrument [Line Items] |
Financings and Capitalization | Financings and Capitalization Financings: Presented in the following table is a summary of major long-term debt issuances during the nine months ended September 30, 2025:
| Principal (In Millions) | Interest Rate (%) | Issuance Date | Maturity Date
CMS Energy, parent only |  |  |  |  |
Junior subordinated notes 1 |  | $ | 1,000 |  | 6.500 |  | February 2025 | June 2055
Term loan credit agreement |  | 110 |  | variable | February 2025 | December 2025
Total CMS Energy, parent only |  | $ | 1,110 |  |  |  |
NorthStar Clean Energy, including subsidiaries |  |  |  |  |
Construction financing agreement 2 |  | $ | 179 |  | variable | February 2025 | Five years after conversion date 2
Total NorthStar Clean Energy, including subsidiaries |  | $ | 179 |  |  |  |
Consumers |  |  |  |  |
First mortgage bonds |  | $ | 500 |  | 4.500 |  | May 2025 | January 2031
First mortgage bonds |  | 625 |  | 5.050 |  | May 2025 | May 2035
Total Consumers |  | $ | 1,125 |  |  |  |
Total CMS Energy |  | $ | 2,414 |  |  |  |
1 These unsecured obligations rank subordinate and junior in right of payment to all of CMS Energy’s existing and future senior indebtedness. On June 1, 2035, and every five years thereafter, the notes will reset to an interest rate equal to the five-year treasury rate plus 1.961 percent. 2 At completion of project construction, scheduled for the first half of 2026, these financings will convert into a term loan that will mature five years after the conversion date. Retirements: Presented in the following table is a summary of major long-term debt retirements during the nine months ended September 30, 2025:
| Principal (In Millions) | Interest Rate (%) | Retirement Date | Maturity Date
CMS Energy, parent only |  |  |  |  |
Term loan credit agreement |  | $ | 400 |  | variable | February 2025 | September 2025
Term loan credit agreement |  | 200 |  | variable | February 2025 | December 2025
Total CMS Energy, parent only |  | $ | 600 |  |  |  |
Total CMS Energy |  | $ | 600 |  |  |  |
CMS Energy’s Purchase of Consumers’ First Mortgage Bonds: CMS Energy purchased Consumers’ first mortgage bonds with a principal balance of $184 million during the nine months ended September 30, 2025 in exchange for cash of $109 million. On a consolidated basis, CMS Energy’s repurchase of Consumers’ first mortgage bonds was accounted for as a debt extinguishment and resulted in a pre-tax gain of $72 million during the nine months ended September 30, 2025, which was recorded in other income on CMS Energy’s consolidated statements of income. Interest expense related to the repurchased bonds was $8 million for the three months ended September 30, 2025 and $21 million for the nine months ended September 30, 2025, which was recorded in interest expense - related parties on Consumers’ consolidated statements of income. CMS Energy purchased Consumers’ first mortgage bonds with a principal balance of $69 million during the three months ended September 30, 2024 and $311 million during the nine months ended September 30, 2024, in exchange for cash of $49 million and $218 million, respectively. On a consolidated basis, CMS Energy’s repurchase of Consumers’ first mortgage bonds was accounted for as a debt extinguishment and resulted in a pre-tax gain of $20 million for the three months ended September 30, 2024 and a pre-tax gain of $90 million for the nine months ended September 30, 2024, which was recorded in other income on its consolidated statements of income. Interest expense related to the repurchased bonds was $5 million for the three months ended September 30, 2024 and $13 million for the nine months ended September 30, 2024, which was recorded in interest expense - related parties on Consumers’ consolidated statements of income. Credit Facilities: The following credit facilities with banks were available at September 30, 2025:
In Millions
Expiration Date | Amount of Facility | Amount Borrowed | Letters of Credit Outstanding | Amount Available
CMS Energy, parent only |  |  |  |  |  |  |  |
December 14, 2027 1 |  | $ | 550 |  |  | $ | — |  |  | $ | 35 |  |  | $ | 515 |
September 30, 2026 |  | 50 |  |  | — |  |  | 50 |  |  | — |
NorthStar Clean Energy, including subsidiaries |  |  |  |  |  |  |  |
May 30, 2028 2 |  | $ | 250 |  |  | $ | 180 |  |  | $ | 8 |  |  | $ | 62 |
December 25, 2025 3 |  | 37 |  |  | — |  |  | 37 |  |  | — |
Upon completion of construction project 4 |  | 19 |  |  | — |  |  | 12 |  |  | 7 |
Consumers |  |  |  |  |  |  |  |
December 14, 2027 5 |  | $ | 1,100 |  |  | $ | — |  |  | $ | 10 |  |  | $ | 1,090 |
November 18, 2025 5 |  | 250 |  |  | — |  |  | 112 |  |  | 138 |
March 31, 2028 |  | 50 |  |  | — |  |  | 42 |  |  | 8 |
1 There were no borrowings under this facility during the nine months ended September 30, 2025. 2 Obligations under this facility are secured by certain pledged equity interests in subsidiaries of NorthStar Clean Energy; under the terms of this facility, the interests may not be sold by NorthStar Clean Energy unless there is an agreed-upon substitution for the pledged equity interests. At September 30, 2025, the net book value of the pledged equity interests was $515 million. Also under the terms of this facility, NorthStar Clean Energy may be restricted from remitting cash dividends to CMS Energy in the event of default. 3 This letter of credit facility is available to Aviator Wind Equity Holdings. For more information regarding Aviator Wind Equity Holdings, see Note 11, Variable Interest Entities. 4 The letter of credit facility is available to certain subsidiaries of NorthStar Clean Energy. The letter of credit facility will expire upon completion of project construction scheduled for the first half of 2026. 5 Obligations under these facilities are secured by first mortgage bonds of Consumers. There were no borrowings under these facilities during the nine months ended September 30, 2025. Regulatory Authorization for Financings: Consumers is required to maintain FERC authorization for financings. Any long-term issuances during the authorization period are exempt from FERC’s competitive bidding and negotiated placement requirements. Its short-term authorization ends on May 2, 2026. In February 2025, FERC approved Consumers’ application for authority to issue long-term debt securities. The authorization is effective February 21, 2025 through February 20, 2027. Short-term Borrowings: Under Consumers’ commercial paper program, Consumers may issue, in one or more placements, investment-grade commercial paper notes with maturities of up to 365 days at market interest rates. These issuances are supported by Consumers’ revolving credit facilities and may have an aggregate principal amount outstanding of up to $500 million. While the amount of outstanding commercial paper does not reduce the available capacity of the revolving credit facilities, Consumers does not intend to issue commercial paper in an amount exceeding the available capacity of the facilities. At September 30, 2025, there were no commercial paper notes outstanding under this program. In December 2024, Consumers renewed a short-term credit agreement with CMS Energy, permitting Consumers to borrow up to $500 million at an interest rate of the prior month’s average one‑month Term SOFR minus 0.100 percent. At September 30, 2025, there were no outstanding borrowings under the agreement. Dividend Restrictions: At September 30, 2025, payment of dividends by CMS Energy on its common stock was limited to $8.6 billion under provisions of the Michigan Business Corporation Act of 1972. Under the provisions of its articles of incorporation, at September 30, 2025, Consumers had $2.5 billion of unrestricted retained earnings available to pay dividends on its common stock to CMS Energy. Provisions of the Federal Power Act and the Natural Gas Act appear to restrict dividends payable by Consumers to the amount of Consumers’ retained earnings. Several decisions from FERC suggest that, under a variety of circumstances, dividends from Consumers on its common stock would not be limited to amounts in Consumers’ retained earnings. Any decision by Consumers to pay dividends on its common stock in excess of retained earnings would be based on specific facts and circumstances and would be subject to a formal regulatory filing process. During the nine months ended September 30, 2025, Consumers paid $649 million in dividends on its common stock to CMS Energy. Issuance of Common Stock: In 2023, CMS Energy entered into an equity offering program under which it may sell shares of its common stock having an aggregate sales price of up to $1 billion in privately negotiated transactions, in “at the market” offerings, or through forward sales transactions. Under the forward sales transactions, CMS Energy may either settle physically by issuing shares of its common stock at the then-applicable forward sale price specified by the agreement or settle net by delivering or receiving cash or shares. CMS Energy may settle the contracts at any time through their maturity dates, and presently intends to physically settle the contracts by delivering shares of its common stock. During the three months ended September 30, 2025, CMS Energy entered into forward sale agreements for approximately 2.1 million shares at a weighted average initial forward price of $72.42 per share. During the same period, CMS Energy settled forward sale contracts under this program by issuing approximately 5.0 million shares at a weighted average price of $70.52 p er share, resulting in net proceeds o f $349 million. In October 2025, CMS Energy completed an additional settlement issuing approximately 2.0 million shares at a weighted average price of $72.73, resulting in net proceeds of $147 million. Following these transactions, outstanding forward contracts under the program have an aggregate sales price of $8 million, maturing through November 30, 2026. The initial forward price in the forward equity sale contracts includes a deduction for commissions and will be adjusted on a daily basis over the term based on an interest rate factor and decreased on certain dates by certain predetermined amounts to reflect expected dividend payments. No amounts are recorded on CMS Energy’s consolidated balance sheets until settlements of the forward equity sale contracts occur. If CMS Energy had elected to net share settle or net cash settle the contracts as of September 30, 2025, it would have been required to deliver 21,313 shares or pay $2 million in cash.
NorthStar Clean Energy |
Debt Instrument [Line Items] |
Financings and Capitalization | NorthStar Clean Energy’s Supplier Financing Program: Under a supplier financing program, NorthStar Clean Energy agrees to pay a bank that is acting as its payment agent the stated amount of confirmed invoices from participating suppliers on the original maturity dates of the invoices. The bank is required to pay the supplier invoices that have been confirmed as valid under the program in full within 135 days of the invoice date. NorthStar Clean Energy does not provide collateral or a guarantee to the bank in support of its payment obligations under the agreement, nor does it pay a fee for the service. NorthStar Clean Energy or the bank may terminate the supplier financing program agreement upon 30 days prior written notice to the other party. At September 30, 2025, obligations under this program accounted for as accounts payable on CMS Energy’s consolidated balance sheets were $79 million.

X
- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 405 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477092/405-40-50-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 470 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/470/tableOfContent Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I + Details
Name: | us-gaap_DebtDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 30: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 31: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
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: |

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