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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2020
Asset Retirement Obligations [Line Items] |
Schedule of Asset Retirement Obligations | 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:
Company and ARO Description | In-Service Date | Long-Lived Assets
CMS Energy, including Consumers |  |
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
Consumers |  |
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 12/31/2019 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2020
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 474 |  |  | $ | 46 |  |  | $ | (41) |  |  | $ | 23 |  |  | $ | 28 |  |  | $ | 530 |
Renewable generation assets |  | 3 |  |  | 19 |  |  | — |  |  | 1 |  |  | — |  |  | 23 |
Total CMS Energy |  | $ | 477 |  |  | $ | 65 |  |  | $ | (41) |  |  | $ | 24 |  |  | $ | 28 |  |  | $ | 553 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 166 |  |  | $ | — |  |  | $ | (24) |  |  | $ | 6 |  |  | $ | — |  |  | $ | 148 |
Gas distribution cut, purge, and cap |  | 231 |  |  | 1 |  |  | (5) |  |  | 13 |  |  | — |  |  | 240 |
Asbestos abatement |  | 34 |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 36 |
Renewable generation assets |  | 21 |  |  | 24 |  |  | — |  |  | 1 |  |  | 28 |  |  | 74 |
Gas wells plug and abandon |  | 22 |  |  | 16 |  |  | (7) |  |  | 1 |  |  | — |  |  | 32 |
Cable under Straits of Mackinac 1 |  | — |  |  | 5 |  |  | (5) |  |  | — |  |  | — |  |  | — |
Total Consumers |  | $ | 474 |  |  | $ | 46 |  |  | $ | (41) |  |  | $ | 23 |  |  | $ | 28 |  |  | $ | 530 |
1 For further details, see Note 4, Contingencies and Commitments—Consumers Electric Utility Contingencies.
In Millions
Company and ARO Description | ARO Liability 12/31/2018 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2019
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 428 |  |  | $ | 55 |  |  | $ | (37) |  |  | $ | 21 |  |  | $ | 7 |  |  | $ | 474 |
Gas treating plant and gas wells |  | 1 |  |  | — |  |  | (1) |  |  | — |  |  | — |  |  | — |
Renewable generation assets |  | 3 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3 |
Total CMS Energy |  | $ | 432 |  |  | $ | 55 |  |  | $ | (38) |  |  | $ | 21 |  |  | $ | 7 |  |  | $ | 477 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 179 |  |  | $ | — |  |  | $ | (27) |  |  | $ | 7 |  |  | $ | 7 |  |  | $ | 166 |
Gas distribution cut, purge, and cap |  | 205 |  |  | 22 |  |  | (8) |  |  | 12 |  |  | — |  |  | 231 |
Asbestos abatement |  | 33 |  |  | — |  |  | (1) |  |  | 2 |  |  | — |  |  | 34 |
Renewable generation assets |  | 11 |  |  | 10 |  |  | — |  |  | — |  |  | — |  |  | 21 |
Gas wells plug and abandon |  | — |  |  | 23 |  |  | (1) |  |  | — |  |  | — |  |  | 22 |
Total Consumers |  | $ | 428 |  |  | $ | 55 |  |  | $ | (37) |  |  | $ | 21 |  |  | $ | 7 |  |  | $ | 474 |
Consumers Energy Company |
Asset Retirement Obligations [Line Items] |
Schedule of Asset Retirement Obligations | 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:
Company and ARO Description | In-Service Date | Long-Lived Assets
CMS Energy, including Consumers |  |
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
Consumers |  |
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 12/31/2019 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2020
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 474 |  |  | $ | 46 |  |  | $ | (41) |  |  | $ | 23 |  |  | $ | 28 |  |  | $ | 530 |
Renewable generation assets |  | 3 |  |  | 19 |  |  | — |  |  | 1 |  |  | — |  |  | 23 |
Total CMS Energy |  | $ | 477 |  |  | $ | 65 |  |  | $ | (41) |  |  | $ | 24 |  |  | $ | 28 |  |  | $ | 553 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 166 |  |  | $ | — |  |  | $ | (24) |  |  | $ | 6 |  |  | $ | — |  |  | $ | 148 |
Gas distribution cut, purge, and cap |  | 231 |  |  | 1 |  |  | (5) |  |  | 13 |  |  | — |  |  | 240 |
Asbestos abatement |  | 34 |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 36 |
Renewable generation assets |  | 21 |  |  | 24 |  |  | — |  |  | 1 |  |  | 28 |  |  | 74 |
Gas wells plug and abandon |  | 22 |  |  | 16 |  |  | (7) |  |  | 1 |  |  | — |  |  | 32 |
Cable under Straits of Mackinac 1 |  | — |  |  | 5 |  |  | (5) |  |  | — |  |  | — |  |  | — |
Total Consumers |  | $ | 474 |  |  | $ | 46 |  |  | $ | (41) |  |  | $ | 23 |  |  | $ | 28 |  |  | $ | 530 |
1 For further details, see Note 4, Contingencies and Commitments—Consumers Electric Utility Contingencies.
In Millions
Company and ARO Description | ARO Liability 12/31/2018 | Incurred | Settled | Accretion | Cash Flow Revisions | ARO Liability 12/31/2019
CMS Energy, including Consumers |  |  |  |  |  |  |  |
Consumers |  | $ | 428 |  |  | $ | 55 |  |  | $ | (37) |  |  | $ | 21 |  |  | $ | 7 |  |  | $ | 474 |
Gas treating plant and gas wells |  | 1 |  |  | — |  |  | (1) |  |  | — |  |  | — |  |  | — |
Renewable generation assets |  | 3 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3 |
Total CMS Energy |  | $ | 432 |  |  | $ | 55 |  |  | $ | (38) |  |  | $ | 21 |  |  | $ | 7 |  |  | $ | 477 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 179 |  |  | $ | — |  |  | $ | (27) |  |  | $ | 7 |  |  | $ | 7 |  |  | $ | 166 |
Gas distribution cut, purge, and cap |  | 205 |  |  | 22 |  |  | (8) |  |  | 12 |  |  | — |  |  | 231 |
Asbestos abatement |  | 33 |  |  | — |  |  | (1) |  |  | 2 |  |  | — |  |  | 34 |
Renewable generation assets |  | 11 |  |  | 10 |  |  | — |  |  | — |  |  | — |  |  | 21 |
Gas wells plug and abandon |  | — |  |  | 23 |  |  | (1) |  |  | — |  |  | — |  |  | 22 |
Total Consumers |  | $ | 428 |  |  | $ | 55 |  |  | $ | (37) |  |  | $ | 21 |  |  | $ | 7 |  |  | $ | 474 |

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