XML 81 R51.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Asset Retirement Obligations (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Asset Retirement Obligations [Line Items] |
Schedule of Categories of Assets for which an ARO Liability is Recorded | Presented below are the categories of assets that CMS Energy and Consumers have legal obligations to remove at the end of their useful lives and for which they have an ARO liability recorded:
ARO Description | In-service Date | Long-lived Assets
Closure of coal ash disposal areas | various | Generating plants coal ash areas
Gas distribution cut, purge, and cap | various | Gas distribution mains and services
Asbestos abatement | 1973 | Electric and gas utility plant
Closure of renewable generation assets | various | Wind and solar generation facilities
Gas wells plug and abandon | various | Gas transmission and storage
Schedule of Change in Asset Retirement Obligation | Presented in the following tables are the changes in CMS Energy’s and Consumers’ ARO liabilities:
In Millions
Company and ARO Description | ARO Liability 12/31/2023 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2024
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 739 |  |  | $ | 1 |  |  | $ | (69) |  |  | $ | 33 |  |  | $ | (10) |  |  | $ | 694 |
Renewable generation assets |  | 32 |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 34 |
Total CMS Energy |  | $ | 771 |  |  | $ | 1 |  |  | $ | (69) |  |  | $ | 35 |  |  | $ | (10) |  |  | $ | 728 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 268 |  |  | $ | 1 |  |  | $ | (51) |  |  | $ | 12 |  |  | $ | — |  |  | $ | 230 |
Gas distribution cut, purge, and cap |  | 290 |  |  | — |  |  | (9) |  |  | 15 |  |  | (1) |  |  | 295 |
Asbestos abatement |  | 51 |  |  | — |  |  | (7) |  |  | 2 |  |  | (9) |  |  | 37 |
Renewable generation assets |  | 102 |  |  | — |  |  | — |  |  | 3 |  |  | — |  |  | 105 |
Gas wells plug and abandon |  | 28 |  |  | — |  |  | (2) |  |  | 1 |  |  | — |  |  | 27 |
Total Consumers |  | $ | 739 |  |  | $ | 1 |  |  | $ | (69) |  |  | $ | 33 |  |  | $ | (10) |  |  | $ | 694 |
In Millions
Company and ARO Description | ARO Liability 12/31/2022 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2023
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 722 |  |  | $ | 4 |  |  | $ | (28) |  |  | $ | 32 |  |  | $ | 9 |  |  | $ | 739 |
Renewable generation assets |  | 24 |  |  | 7 |  |  | — |  |  | 1 |  |  | — |  |  | 32 |
Total CMS Energy |  | $ | 746 |  |  | $ | 11 |  |  | $ | (28) |  |  | $ | 33 |  |  | $ | 9 |  |  | $ | 771 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 272 |  |  | $ | — |  |  | $ | (15) |  |  | $ | 11 |  |  | $ | — |  |  | $ | 268 |
Gas distribution cut, purge, and cap |  | 287 |  |  | — |  |  | (10) |  |  | 14 |  |  | (1) |  |  | 290 |
Asbestos abatement |  | 39 |  |  | — |  |  | (1) |  |  | 3 |  |  | 10 |  |  | 51 |
Renewable generation assets |  | 95 |  |  | 4 |  |  | — |  |  | 3 |  |  | — |  |  | 102 |
Gas wells plug and abandon |  | 29 |  |  | — |  |  | (2) |  |  | 1 |  |  | — |  |  | 28 |
Total Consumers |  | $ | 722 |  |  | $ | 4 |  |  | $ | (28) |  |  | $ | 32 |  |  | $ | 9 |  |  | $ | 739 |
Consumers Energy Company |
Asset Retirement Obligations [Line Items] |
Schedule of Categories of Assets for which an ARO Liability is Recorded | Presented below are the categories of assets that CMS Energy and Consumers have legal obligations to remove at the end of their useful lives and for which they have an ARO liability recorded:
ARO Description | In-service Date | Long-lived Assets
Closure of coal ash disposal areas | various | Generating plants coal ash areas
Gas distribution cut, purge, and cap | various | Gas distribution mains and services
Asbestos abatement | 1973 | Electric and gas utility plant
Closure of renewable generation assets | various | Wind and solar generation facilities
Gas wells plug and abandon | various | Gas transmission and storage
Schedule of Change in Asset Retirement Obligation | Presented in the following tables are the changes in CMS Energy’s and Consumers’ ARO liabilities:
In Millions
Company and ARO Description | ARO Liability 12/31/2023 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2024
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 739 |  |  | $ | 1 |  |  | $ | (69) |  |  | $ | 33 |  |  | $ | (10) |  |  | $ | 694 |
Renewable generation assets |  | 32 |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 34 |
Total CMS Energy |  | $ | 771 |  |  | $ | 1 |  |  | $ | (69) |  |  | $ | 35 |  |  | $ | (10) |  |  | $ | 728 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 268 |  |  | $ | 1 |  |  | $ | (51) |  |  | $ | 12 |  |  | $ | — |  |  | $ | 230 |
Gas distribution cut, purge, and cap |  | 290 |  |  | — |  |  | (9) |  |  | 15 |  |  | (1) |  |  | 295 |
Asbestos abatement |  | 51 |  |  | — |  |  | (7) |  |  | 2 |  |  | (9) |  |  | 37 |
Renewable generation assets |  | 102 |  |  | — |  |  | — |  |  | 3 |  |  | — |  |  | 105 |
Gas wells plug and abandon |  | 28 |  |  | — |  |  | (2) |  |  | 1 |  |  | — |  |  | 27 |
Total Consumers |  | $ | 739 |  |  | $ | 1 |  |  | $ | (69) |  |  | $ | 33 |  |  | $ | (10) |  |  | $ | 694 |
In Millions
Company and ARO Description | ARO Liability 12/31/2022 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2023
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 722 |  |  | $ | 4 |  |  | $ | (28) |  |  | $ | 32 |  |  | $ | 9 |  |  | $ | 739 |
Renewable generation assets |  | 24 |  |  | 7 |  |  | — |  |  | 1 |  |  | — |  |  | 32 |
Total CMS Energy |  | $ | 746 |  |  | $ | 11 |  |  | $ | (28) |  |  | $ | 33 |  |  | $ | 9 |  |  | $ | 771 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 272 |  |  | $ | — |  |  | $ | (15) |  |  | $ | 11 |  |  | $ | — |  |  | $ | 268 |
Gas distribution cut, purge, and cap |  | 287 |  |  | — |  |  | (10) |  |  | 14 |  |  | (1) |  |  | 290 |
Asbestos abatement |  | 39 |  |  | — |  |  | (1) |  |  | 3 |  |  | 10 |  |  | 51 |
Renewable generation assets |  | 95 |  |  | 4 |  |  | — |  |  | 3 |  |  | — |  |  | 102 |
Gas wells plug and abandon |  | 29 |  |  | — |  |  | (2) |  |  | 1 |  |  | — |  |  | 28 |
Total Consumers |  | $ | 722 |  |  | $ | 4 |  |  | $ | (28) |  |  | $ | 32 |  |  | $ | 9 |  |  | $ | 739 |

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

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
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: |