Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2019

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 gas treating plant and gas wells	various	Gas transmission and storage
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 12/31/2018			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

In Millions
Company and ARO Description	ARO Liability 12/31/2017			Incurred			Settled				Accretion			Cash Flow Revisions			ARO Liability 12/31/2018
CMS Energy, including Consumers
Consumers		$	429		$	17		$	(40	)		$	22		$	—		$	428
Gas treating plant and gas wells		1			—			—				—			—			1
Renewable generation assets		—			3			—				—			—			3
Total CMS Energy		$	430		$	20		$	(40	)		$	22		$	—		$	432
Consumers
Coal ash disposal areas		$	191		$	—		$	(20	)		$	8		$	—		$	179
Gas distribution cut, purge, and cap		186			17			(9		)		11			—			205
Asbestos abatement		42			—			(11		)		2			—			33
Renewable generation assets		10			—			—				1			—			11
Total Consumers		$	429		$	17		$	(40	)		$	22		$	—		$	428

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 gas treating plant and gas wells	various	Gas transmission and storage
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 12/31/2018			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

In Millions
Company and ARO Description	ARO Liability 12/31/2017			Incurred			Settled				Accretion			Cash Flow Revisions			ARO Liability 12/31/2018
CMS Energy, including Consumers
Consumers		$	429		$	17		$	(40	)		$	22		$	—		$	428
Gas treating plant and gas wells		1			—			—				—			—			1
Renewable generation assets		—			3			—				—			—			3
Total CMS Energy		$	430		$	20		$	(40	)		$	22		$	—		$	432
Consumers
Coal ash disposal areas		$	191		$	—		$	(20	)		$	8		$	—		$	179
Gas distribution cut, purge, and cap		186			17			(9		)		11			—			205
Asbestos abatement		42			—			(11		)		2			—			33
Renewable generation assets		10			—			—				1			—			11
Total Consumers		$	429		$	17		$	(40	)		$	22		$	—		$	428