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Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2023
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 DescriptionIn-Service DateLong-Lived Assets
Closure of coal ash disposal areasvariousGenerating plants coal ash areas
Gas distribution cut, purge, and capvariousGas distribution mains and services
Asbestos abatement1973Electric and gas utility plant
Closure of renewable generation assetsvariousWind and solar generation facilities
Gas wells plug and abandonvariousGas 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 DescriptionARO Liability 12/31/2022IncurredSettledAccretionCash Flow RevisionsARO Liability 12/31/2023
CMS Energy, including Consumers
Consumers$722 $$(28)$32 $$739 
Renewable generation assets24 — — 32 
Total CMS Energy$746 $11 $(28)$33 $$771 
Consumers
Coal ash disposal areas$272 $— $(15)$11 $— $268 
Gas distribution cut, purge, and cap287 — (10)14 (1)290 
Asbestos abatement39 — (1)10 51 
Renewable generation assets95 — — 102 
Gas wells plug and abandon29 — (2)— 28 
Total Consumers$722 $$(28)$32 $$739 
In Millions
Company and ARO DescriptionARO Liability 12/31/2021IncurredSettledAccretion
Cash Flow Revisions1
ARO Liability 12/31/2022
CMS Energy, including Consumers
Consumers$605 $$(39)$27 $128 $722 
Renewable generation assets23 — — — 24 
Total CMS Energy$628 $$(39)$28 $128 $746 
Consumers
Coal ash disposal areas$157 $— $(20)$$128 $272 
Gas distribution cut, purge, and cap282 (11)15 — 287 
Asbestos abatement38 — (1)— 39 
Renewable generation assets93 — — — 95 
Gas wells plug and abandon35 — (7)— 29 
Total Consumers$605 $$(39)$27 $128 $722 
1Increase was attributable to a proposed change for closure work at the J.H. Campbell 3 ash disposal landfill and an updated cost estimate for other coal ash disposal areas.
Consumers Energy Company  
Asset Retirement Obligations [Line Items]  
Schedule of Categories of Assets for which an ARO Liability is Recorded
Presented below are the categories of assets that CMS Energy and Consumers have legal obligations to remove at the end of their useful lives and for which they have an ARO liability recorded:
ARO DescriptionIn-Service DateLong-Lived Assets
Closure of coal ash disposal areasvariousGenerating plants coal ash areas
Gas distribution cut, purge, and capvariousGas distribution mains and services
Asbestos abatement1973Electric and gas utility plant
Closure of renewable generation assetsvariousWind and solar generation facilities
Gas wells plug and abandonvariousGas transmission and storage
Schedule of Change in Asset Retirement Obligation
Presented in the following tables are the changes in CMS Energy’s and Consumers’ ARO liabilities:
In Millions
Company and ARO DescriptionARO Liability 12/31/2022IncurredSettledAccretionCash Flow RevisionsARO Liability 12/31/2023
CMS Energy, including Consumers
Consumers$722 $$(28)$32 $$739 
Renewable generation assets24 — — 32 
Total CMS Energy$746 $11 $(28)$33 $$771 
Consumers
Coal ash disposal areas$272 $— $(15)$11 $— $268 
Gas distribution cut, purge, and cap287 — (10)14 (1)290 
Asbestos abatement39 — (1)10 51 
Renewable generation assets95 — — 102 
Gas wells plug and abandon29 — (2)— 28 
Total Consumers$722 $$(28)$32 $$739 
In Millions
Company and ARO DescriptionARO Liability 12/31/2021IncurredSettledAccretion
Cash Flow Revisions1
ARO Liability 12/31/2022
CMS Energy, including Consumers
Consumers$605 $$(39)$27 $128 $722 
Renewable generation assets23 — — — 24 
Total CMS Energy$628 $$(39)$28 $128 $746 
Consumers
Coal ash disposal areas$157 $— $(20)$$128 $272 
Gas distribution cut, purge, and cap282 (11)15 — 287 
Asbestos abatement38 — (1)— 39 
Renewable generation assets93 — — — 95 
Gas wells plug and abandon35 — (7)— 29 
Total Consumers$605 $$(39)$27 $128 $722 
1Increase was attributable to a proposed change for closure work at the J.H. Campbell 3 ash disposal landfill and an updated cost estimate for other coal ash disposal areas.