v3.25.4

Revenue | 12 Months Ended
--- | ---
Dec. 31, 2025
Disaggregation of Revenue [Line Items] |
Revenue | Revenue Presented in the following tables are the components of operating revenue:
In Millions
Year Ended December 31, 2025 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 5,578 |  |  | $ | 2,468 |  |  | $ | — |  |  |  |  | $ | 8,046 |
Other |  | — |  |  | — |  |  | 259 |  |  |  |  | 259 |
Revenue recognized from contracts with customers |  | $ | 5,578 |  |  | $ | 2,468 |  |  | $ | 259 |  |  |  |  | $ | 8,305 |
Leasing income |  | — |  |  | — |  |  | 149 |  |  |  |  | 149 |
Financing income |  | 10 |  |  | 6 |  |  | — |  |  |  |  | 16 |
Consumers alternative-revenue programs |  | 50 |  |  | 19 |  |  | — |  |  |  |  | 69 |
Total operating revenue – CMS Energy |  | $ | 5,638 |  |  | $ | 2,493 |  |  | $ | 408 |  |  |  |  | $ | 8,539 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,661 |  |  | $ | 1,701 |  |  |  |  |  |  | $ | 4,362 |
Commercial |  | 1,888 |  |  | 538 |  |  |  |  |  |  | 2,426 |
Industrial |  | 762 |  |  | 62 |  |  |  |  |  |  | 824 |
Other |  | 267 |  |  | 167 |  |  |  |  |  |  | 434 |
Revenue recognized from contracts with customers |  | $ | 5,578 |  |  | $ | 2,468 |  |  |  |  |  |  | $ | 8,046 |
Financing income |  | 10 |  |  | 6 |  |  |  |  |  |  | 16 |
Alternative-revenue programs |  | 50 |  |  | 19 |  |  |  |  |  |  | 69 |
Other non-segment revenue |  | — |  |  | — |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 5,638 |  |  | $ | 2,493 |  |  |  |  |  |  | $ | 8,132 |
1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities.
In Millions
Year Ended December 31, 2024 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 4,995 |  |  | $ | 2,114 |  |  | $ | — |  |  |  |  | $ | 7,109 |
Other |  | — |  |  | — |  |  | 211 |  |  |  |  | 211 |
Revenue recognized from contracts with customers |  | $ | 4,995 |  |  | $ | 2,114 |  |  | $ | 211 |  |  |  |  | $ | 7,320 |
Leasing income |  | — |  |  | — |  |  | 105 |  |  |  |  | 105 |
Financing income |  | 10 |  |  | 5 |  |  | — |  |  |  |  | 15 |
Consumers alternative-revenue programs |  | 56 |  |  | 19 |  |  | — |  |  |  |  | 75 |
Total operating revenue – CMS Energy |  | $ | 5,061 |  |  | $ | 2,138 |  |  | $ | 316 |  |  |  |  | $ | 7,515 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,318 |  |  | $ | 1,429 |  |  |  |  |  |  | $ | 3,747 |
Commercial |  | 1,674 |  |  | 440 |  |  |  |  |  |  | 2,114 |
Industrial |  | 670 |  |  | 50 |  |  |  |  |  |  | 720 |
Other |  | 333 |  |  | 195 |  |  |  |  |  |  | 528 |
Revenue recognized from contracts with customers |  | $ | 4,995 |  |  | $ | 2,114 |  |  |  |  |  |  | $ | 7,109 |
Financing income |  | 10 |  |  | 5 |  |  |  |  |  |  | 15 |
Alternative-revenue programs |  | 56 |  |  | 19 |  |  |  |  |  |  | 75 |
Other non-segment revenue |  | — |  |  | — |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 5,061 |  |  | $ | 2,138 |  |  |  |  |  |  | $ | 7,200 |
1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities.
In Millions
Year Ended December 31, 2023 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 4,686 |  |  | $ | 2,394 |  |  | $ | — |  |  |  |  |  |  | $ | 7,080 |
Other |  | — |  |  | — |  |  | 181 |  |  |  |  |  |  | 181 |
Revenue recognized from contracts with customers |  | $ | 4,686 |  |  | $ | 2,394 |  |  | $ | 181 |  |  |  |  |  |  | $ | 7,261 |
Leasing income |  | — |  |  | — |  |  | 116 |  |  |  |  |  |  | 116 |
Financing income |  | 10 |  |  | 6 |  |  | — |  |  |  |  |  |  | 16 |
Consumers alternative-revenue programs |  | 49 |  |  | 20 |  |  | — |  |  |  |  |  |  | 69 |
Total operating revenue – CMS Energy |  | $ | 4,745 |  |  | $ | 2,420 |  |  | $ | 297 |  |  |  |  |  |  | $ | 7,462 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,236 |  |  | $ | 1,619 |  |  |  |  |  |  |  |  | $ | 3,855 |
Commercial |  | 1,550 |  |  | 489 |  |  |  |  |  |  |  |  | 2,039 |
Industrial |  | 660 |  |  | 60 |  |  |  |  |  |  |  |  | 720 |
Other |  | 240 |  |  | 226 |  |  |  |  |  |  |  |  | 466 |
Revenue recognized from contracts with customers |  | $ | 4,686 |  |  | $ | 2,394 |  |  |  |  |  |  |  |  | $ | 7,080 |
Financing income |  | 10 |  |  | 6 |  |  |  |  |  |  |  |  | 16 |
Alternative-revenue programs |  | 49 |  |  | 20 |  |  |  |  |  |  |  |  | 69 |
Other non-segment revenue |  | — |  |  | — |  |  |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 4,745 |  |  | $ | 2,420 |  |  |  |  |  |  |  |  | $ | 7,166 |
1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities. Electric and Gas Utilities Consumers Utility Revenue: Consumers recognizes revenue primarily from the sale of electric and gas utility services at tariff-based rates regulated by the MPSC. Consumers’ customer base consists of a mix of residential, commercial, and diversified industrial customers. Consumers’ tariff-based sales performance obligations are described below. •Consumers has performance obligations for the service of standing ready to deliver electricity or natural gas to customers, and it satisfies these performance obligations over time. Consumers recognizes revenue at a fixed rate as it provides these services. These arrangements generally do not have fixed terms and remain in effect as long as the customer consumes the utility service. The rates are set by the MPSC through the rate-making process and represent the stand-alone selling price of Consumers’ service to stand ready to deliver. •Consumers has performance obligations for the service of delivering the commodity of electricity or natural gas to customers, and it satisfies these performance obligations upon delivery. Consumers recognizes revenue at a price per unit of electricity or natural gas delivered, based on the tariffs established by the MPSC. These arrangements generally do not have fixed terms and remain in effect as long as the customer consumes the utility service. The rates are set by the MPSC through the rate-making process and represent the stand-alone selling price of a bundled product comprising the commodity, electricity or natural gas, and the service of delivering such commodity. In some instances, Consumers has specific fixed-term contracts with large commercial and industrial customers to provide electricity or gas at certain tariff rates or to provide gas transportation services at contracted rates. The amount of electricity and gas to be delivered under these contracts and the associated future revenue to be received are generally dependent on the customers’ needs. Accordingly, Consumers recognizes revenues at the tariff or contracted rate as electricity or gas is delivered to the customer. Consumers also has other miscellaneous contracts with customers related to pole and other property rentals and utility contract work. Generally, these contracts are short term or evergreen in nature. Accounts Receivable and Unbilled Revenues: Accounts receivable comprise trade receivables and unbilled receivables. CMS Energy and Consumers record their accounts receivable at cost less an allowance for uncollectible accounts. The allowance is increased for uncollectible accounts expense and decreased for account write-offs net of recoveries. CMS Energy and Consumers establish the allowance based on historical losses, management’s assessment of existing economic conditions, customer payment trends, and reasonable and supported forecast information. CMS Energy and Consumers assess late payment fees on trade receivables based on contractual past-due terms established with customers. Accounts are written off when deemed uncollectible, which is generally when they become six months past due. CMS Energy and Consumers recorded uncollectible accounts expense of $40 million for the year ended December 31, 2025, $33 million for the year ended December 31, 2024, and $34 million for the year ended December 31, 2023. Consumers’ customers are billed monthly in cycles having billing dates that do not generally coincide with the end of a calendar month. This results in customers having received electricity or natural gas that they have not been billed for as of the month-end. Consumers estimates its unbilled revenues by applying an average billed rate to total unbilled deliveries for each customer class. Unbilled revenues, which are recorded as accounts receivable and accrued revenue on CMS Energy’s and Consumers’ consolidated balance sheets, were $659 million at December 31, 2025 and $584 million at December 31, 2024. Alternative‑revenue Programs: Consumers accounts for its energy waste reduction incentive mechanism, financial compensation mechanism, and demand response incentive mechanism as alternative-revenue programs. Consumers recognizes revenue related to the energy waste reduction incentive as soon as energy savings exceed the annual targets established by the MPSC. Revenue related to the financial compensation mechanism is recognized as payments are made on MPSC-approved PPAs. Under a demand response incentive mechanism, Consumers earns a financial incentive when it meets demand response targets set by the MPSC. Consumers recognizes revenue related to this program once demand response incentive objectives are complete, the incentive amount is calculable, and the incentive revenue will be collected within a 24‑month period. For additional information on these mechanisms, see Note 3, Regulatory Matters. Consumers does not reclassify revenue from its alternative-revenue program to revenue from contracts with customers at the time the amounts are collected from customers.
Consumers Energy Company |
Disaggregation of Revenue [Line Items] |
Revenue | Revenue Presented in the following tables are the components of operating revenue:
In Millions
Year Ended December 31, 2025 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 5,578 |  |  | $ | 2,468 |  |  | $ | — |  |  |  |  | $ | 8,046 |
Other |  | — |  |  | — |  |  | 259 |  |  |  |  | 259 |
Revenue recognized from contracts with customers |  | $ | 5,578 |  |  | $ | 2,468 |  |  | $ | 259 |  |  |  |  | $ | 8,305 |
Leasing income |  | — |  |  | — |  |  | 149 |  |  |  |  | 149 |
Financing income |  | 10 |  |  | 6 |  |  | — |  |  |  |  | 16 |
Consumers alternative-revenue programs |  | 50 |  |  | 19 |  |  | — |  |  |  |  | 69 |
Total operating revenue – CMS Energy |  | $ | 5,638 |  |  | $ | 2,493 |  |  | $ | 408 |  |  |  |  | $ | 8,539 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,661 |  |  | $ | 1,701 |  |  |  |  |  |  | $ | 4,362 |
Commercial |  | 1,888 |  |  | 538 |  |  |  |  |  |  | 2,426 |
Industrial |  | 762 |  |  | 62 |  |  |  |  |  |  | 824 |
Other |  | 267 |  |  | 167 |  |  |  |  |  |  | 434 |
Revenue recognized from contracts with customers |  | $ | 5,578 |  |  | $ | 2,468 |  |  |  |  |  |  | $ | 8,046 |
Financing income |  | 10 |  |  | 6 |  |  |  |  |  |  | 16 |
Alternative-revenue programs |  | 50 |  |  | 19 |  |  |  |  |  |  | 69 |
Other non-segment revenue |  | — |  |  | — |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 5,638 |  |  | $ | 2,493 |  |  |  |  |  |  | $ | 8,132 |
1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities.
In Millions
Year Ended December 31, 2024 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 4,995 |  |  | $ | 2,114 |  |  | $ | — |  |  |  |  | $ | 7,109 |
Other |  | — |  |  | — |  |  | 211 |  |  |  |  | 211 |
Revenue recognized from contracts with customers |  | $ | 4,995 |  |  | $ | 2,114 |  |  | $ | 211 |  |  |  |  | $ | 7,320 |
Leasing income |  | — |  |  | — |  |  | 105 |  |  |  |  | 105 |
Financing income |  | 10 |  |  | 5 |  |  | — |  |  |  |  | 15 |
Consumers alternative-revenue programs |  | 56 |  |  | 19 |  |  | — |  |  |  |  | 75 |
Total operating revenue – CMS Energy |  | $ | 5,061 |  |  | $ | 2,138 |  |  | $ | 316 |  |  |  |  | $ | 7,515 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,318 |  |  | $ | 1,429 |  |  |  |  |  |  | $ | 3,747 |
Commercial |  | 1,674 |  |  | 440 |  |  |  |  |  |  | 2,114 |
Industrial |  | 670 |  |  | 50 |  |  |  |  |  |  | 720 |
Other |  | 333 |  |  | 195 |  |  |  |  |  |  | 528 |
Revenue recognized from contracts with customers |  | $ | 4,995 |  |  | $ | 2,114 |  |  |  |  |  |  | $ | 7,109 |
Financing income |  | 10 |  |  | 5 |  |  |  |  |  |  | 15 |
Alternative-revenue programs |  | 56 |  |  | 19 |  |  |  |  |  |  | 75 |
Other non-segment revenue |  | — |  |  | — |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 5,061 |  |  | $ | 2,138 |  |  |  |  |  |  | $ | 7,200 |
1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities.
In Millions
Year Ended December 31, 2023 | Electric Utility | Gas Utility | NorthStar Clean Energy 1 |  |  | Consolidated
CMS Energy, including Consumers
Consumers utility revenue |  | $ | 4,686 |  |  | $ | 2,394 |  |  | $ | — |  |  |  |  |  |  | $ | 7,080 |
Other |  | — |  |  | — |  |  | 181 |  |  |  |  |  |  | 181 |
Revenue recognized from contracts with customers |  | $ | 4,686 |  |  | $ | 2,394 |  |  | $ | 181 |  |  |  |  |  |  | $ | 7,261 |
Leasing income |  | — |  |  | — |  |  | 116 |  |  |  |  |  |  | 116 |
Financing income |  | 10 |  |  | 6 |  |  | — |  |  |  |  |  |  | 16 |
Consumers alternative-revenue programs |  | 49 |  |  | 20 |  |  | — |  |  |  |  |  |  | 69 |
Total operating revenue – CMS Energy |  | $ | 4,745 |  |  | $ | 2,420 |  |  | $ | 297 |  |  |  |  |  |  | $ | 7,462 |
Consumers
Consumers utility revenue |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 2,236 |  |  | $ | 1,619 |  |  |  |  |  |  |  |  | $ | 3,855 |
Commercial |  | 1,550 |  |  | 489 |  |  |  |  |  |  |  |  | 2,039 |
Industrial |  | 660 |  |  | 60 |  |  |  |  |  |  |  |  | 720 |
Other |  | 240 |  |  | 226 |  |  |  |  |  |  |  |  | 466 |
Revenue recognized from contracts with customers |  | $ | 4,686 |  |  | $ | 2,394 |  |  |  |  |  |  |  |  | $ | 7,080 |
Financing income |  | 10 |  |  | 6 |  |  |  |  |  |  |  |  | 16 |
Alternative-revenue programs |  | 49 |  |  | 20 |  |  |  |  |  |  |  |  | 69 |
Other non-segment revenue |  | — |  |  | — |  |  |  |  |  |  |  |  | 1 |
Total operating revenue – Consumers |  | $ | 4,745 |  |  | $ | 2,420 |  |  |  |  |  |  |  |  | $ | 7,166 |
1 Amounts represent NorthStar Clean Energy’s operating revenue from independent power production and its sales of energy commodities. Electric and Gas Utilities Consumers Utility Revenue: Consumers recognizes revenue primarily from the sale of electric and gas utility services at tariff-based rates regulated by the MPSC. Consumers’ customer base consists of a mix of residential, commercial, and diversified industrial customers. Consumers’ tariff-based sales performance obligations are described below. •Consumers has performance obligations for the service of standing ready to deliver electricity or natural gas to customers, and it satisfies these performance obligations over time. Consumers recognizes revenue at a fixed rate as it provides these services. These arrangements generally do not have fixed terms and remain in effect as long as the customer consumes the utility service. The rates are set by the MPSC through the rate-making process and represent the stand-alone selling price of Consumers’ service to stand ready to deliver. •Consumers has performance obligations for the service of delivering the commodity of electricity or natural gas to customers, and it satisfies these performance obligations upon delivery. Consumers recognizes revenue at a price per unit of electricity or natural gas delivered, based on the tariffs established by the MPSC. These arrangements generally do not have fixed terms and remain in effect as long as the customer consumes the utility service. The rates are set by the MPSC through the rate-making process and represent the stand-alone selling price of a bundled product comprising the commodity, electricity or natural gas, and the service of delivering such commodity. In some instances, Consumers has specific fixed-term contracts with large commercial and industrial customers to provide electricity or gas at certain tariff rates or to provide gas transportation services at contracted rates. The amount of electricity and gas to be delivered under these contracts and the associated future revenue to be received are generally dependent on the customers’ needs. Accordingly, Consumers recognizes revenues at the tariff or contracted rate as electricity or gas is delivered to the customer. Consumers also has other miscellaneous contracts with customers related to pole and other property rentals and utility contract work. Generally, these contracts are short term or evergreen in nature. Accounts Receivable and Unbilled Revenues: Accounts receivable comprise trade receivables and unbilled receivables. CMS Energy and Consumers record their accounts receivable at cost less an allowance for uncollectible accounts. The allowance is increased for uncollectible accounts expense and decreased for account write-offs net of recoveries. CMS Energy and Consumers establish the allowance based on historical losses, management’s assessment of existing economic conditions, customer payment trends, and reasonable and supported forecast information. CMS Energy and Consumers assess late payment fees on trade receivables based on contractual past-due terms established with customers. Accounts are written off when deemed uncollectible, which is generally when they become six months past due. CMS Energy and Consumers recorded uncollectible accounts expense of $40 million for the year ended December 31, 2025, $33 million for the year ended December 31, 2024, and $34 million for the year ended December 31, 2023. Consumers’ customers are billed monthly in cycles having billing dates that do not generally coincide with the end of a calendar month. This results in customers having received electricity or natural gas that they have not been billed for as of the month-end. Consumers estimates its unbilled revenues by applying an average billed rate to total unbilled deliveries for each customer class. Unbilled revenues, which are recorded as accounts receivable and accrued revenue on CMS Energy’s and Consumers’ consolidated balance sheets, were $659 million at December 31, 2025 and $584 million at December 31, 2024. Alternative‑revenue Programs: Consumers accounts for its energy waste reduction incentive mechanism, financial compensation mechanism, and demand response incentive mechanism as alternative-revenue programs. Consumers recognizes revenue related to the energy waste reduction incentive as soon as energy savings exceed the annual targets established by the MPSC. Revenue related to the financial compensation mechanism is recognized as payments are made on MPSC-approved PPAs. Under a demand response incentive mechanism, Consumers earns a financial incentive when it meets demand response targets set by the MPSC. Consumers recognizes revenue related to this program once demand response incentive objectives are complete, the incentive amount is calculable, and the incentive revenue will be collected within a 24‑month period. For additional information on these mechanisms, see Note 3, Regulatory Matters. Consumers does not reclassify revenue from its alternative-revenue program to revenue from contracts with customers at the time the amounts are collected from customers.

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 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org/606/tableOfContent + Details
Name: | us-gaap_RevenueFromContractWithCustomerTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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