Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Change in Asset Retirement Obligation

In Millions
	ARO															ARO
	Liability												Cash flow			Liability
Company and ARO Description	12/31/2015			Incurred			Settled			Accretion			Revisions			12/31/2016
CMS Energy, including Consumers
Consumers		$	438		$	3		$	(18)		$	23		$	-		$	446
Gas treating plant and gas wells			1			-			-			-			-			1
Total CMS Energy		$	439		$	3		$	(18)		$	23		$	-		$	447
Consumers
Coal ash disposal areas		$	200		$	-		$	(8)		$	9		$	-		$	201
Gas distribution cut, purge, and cap			178			2			(9)			11			-			182
Asbestos abatement			54			-			(1)			3			-			56
Renewable generation assets			6			1			-			-			-			7
Total Consumers		$	438		$	3		$	(18)		$	23		$	-		$	446

In Millions
	ARO															ARO
	Liability												Cash flow			Liability
Company and ARO Description	12/31/2014			Incurred			Settled			Accretion			Revisions			12/31/2015
CMS Energy, including Consumers
Consumers		$	339		$	11		$	(6)		$	20		$	74		$	438
Gas treating plant and gas wells			1			-			-			-			-			1
Total CMS Energy		$	340		$	11		$	(6)		$	20		$	74		$	439
Consumers
Coal ash disposal areas		$	120		$	-		$	-		$	6		$	74		$	200
Gas distribution cut, purge, and cap			162			11			(6)			11			-			178
Asbestos abatement			51			-			-			3			-			54
Renewable generation assets			6			-			-			-			-			6
Total Consumers		$	339		$	11		$	(6)		$	20		$	74		$	438

Consumers Energy Company [Member]

Schedule of Change in Asset Retirement Obligation

In Millions
	ARO															ARO
	Liability												Cash flow			Liability
Company and ARO Description	12/31/2015			Incurred			Settled			Accretion			Revisions			12/31/2016
CMS Energy, including Consumers
Consumers		$	438		$	3		$	(18)		$	23		$	-		$	446
Gas treating plant and gas wells			1			-			-			-			-			1
Total CMS Energy		$	439		$	3		$	(18)		$	23		$	-		$	447
Consumers
Coal ash disposal areas		$	200		$	-		$	(8)		$	9		$	-		$	201
Gas distribution cut, purge, and cap			178			2			(9)			11			-			182
Asbestos abatement			54			-			(1)			3			-			56
Renewable generation assets			6			1			-			-			-			7
Total Consumers		$	438		$	3		$	(18)		$	23		$	-		$	446

In Millions
	ARO															ARO
	Liability												Cash flow			Liability
Company and ARO Description	12/31/2014			Incurred			Settled			Accretion			Revisions			12/31/2015
CMS Energy, including Consumers
Consumers		$	339		$	11		$	(6)		$	20		$	74		$	438
Gas treating plant and gas wells			1			-			-			-			-			1
Total CMS Energy		$	340		$	11		$	(6)		$	20		$	74		$	439
Consumers
Coal ash disposal areas		$	120		$	-		$	-		$	6		$	74		$	200
Gas distribution cut, purge, and cap			162			11			(6)			11			-			178
Asbestos abatement			51			-			-			3			-			54
Renewable generation assets			6			-			-			-			-			6
Total Consumers		$	339		$	11		$	(6)		$	20		$	74		$	438