v3.25.4

Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2025

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			Long-lived Assets
Closure of coal ash disposal areas			Generating plants coal ash areas
Gas distribution cut, purge, and cap			Gas distribution mains and services
Asbestos abatement			Electric and gas utility plant
Closure of renewable generation assets			Wind and solar generation facilities
Capping and partial filling of water intake line			Generating plant water intake line
Gas wells plug and abandon			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 12/31/2024						Incurred						Settled						Accretion						Cash Flow Revisions						ARO Liability 12/31/2025
CMS Energy, including Consumers
Consumers						$	694					$	27					$	(73)					$	32					$	73					$	753
Renewable generation assets						34						4						—						1						—						39
Total CMS Energy						$	728					$	31					$	(73)					$	33					$	73					$	792
Consumers
Coal ash disposal areas						$	230					$	—					$	(37)					$	10					$	60		1			$	263
Gas distribution cut, purge, and cap						295						10						(13)						15						—						307
Asbestos abatement						37						—						(2)						2						—						37
Renewable generation assets						105						17						—						3						—						125
Generating plant water intake line						—						—						—						1						18			2			19
Gas wells plug and abandon						27						—						(21)						1						(5)						2
Total Consumers						$	694					$	27					$	(73)					$	32					$	73					$	753

1    The increase in the AROs associated with coal ash disposal areas was primarily the result of incremental remedies required by EGLE for certain ash disposal ponds and incremental AROs recorded in response to reviews of legacy CCR impoundments.

2    The increase in AROs associated with water intake lines, which were previously immaterial, was primarily the result of changes in the expected scope of required capping following the finalization of decommissioning plans with the local jurisdiction.

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

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			Long-lived Assets
Closure of coal ash disposal areas			Generating plants coal ash areas
Gas distribution cut, purge, and cap			Gas distribution mains and services
Asbestos abatement			Electric and gas utility plant
Closure of renewable generation assets			Wind and solar generation facilities
Capping and partial filling of water intake line			Generating plant water intake line
Gas wells plug and abandon			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 12/31/2024						Incurred						Settled						Accretion						Cash Flow Revisions						ARO Liability 12/31/2025
CMS Energy, including Consumers
Consumers						$	694					$	27					$	(73)					$	32					$	73					$	753
Renewable generation assets						34						4						—						1						—						39
Total CMS Energy						$	728					$	31					$	(73)					$	33					$	73					$	792
Consumers
Coal ash disposal areas						$	230					$	—					$	(37)					$	10					$	60		1			$	263
Gas distribution cut, purge, and cap						295						10						(13)						15						—						307
Asbestos abatement						37						—						(2)						2						—						37
Renewable generation assets						105						17						—						3						—						125
Generating plant water intake line						—						—						—						1						18			2			19
Gas wells plug and abandon						27						—						(21)						1						(5)						2
Total Consumers						$	694					$	27					$	(73)					$	32					$	73					$	753

1    The increase in the AROs associated with coal ash disposal areas was primarily the result of incremental remedies required by EGLE for certain ash disposal ponds and incremental AROs recorded in response to reviews of legacy CCR impoundments.

2    The increase in AROs associated with water intake lines, which were previously immaterial, was primarily the result of changes in the expected scope of required capping following the finalization of decommissioning plans with the local jurisdiction.

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

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Asset Retirement Obligations [Line Items]

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Tabular disclosure of the carrying amount of a liability for asset retirement obligations.

+ References

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-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
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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

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-SubTopic 20
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