Contingencies And Commitments (Tables)

12 Months Ended

Dec. 31, 2015

Site Contingency [Line Items]

Guarantees

In Millions
			Maximum			Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation			Amount
CMS Energy, including Consumers
Indemnity obligations from stock and    asset sale agreements1	Various	Indefinite		$	143		$	7
Guarantees2	Various	Indefinite			51			-
Consumers
Guarantee2	July 2011	Indefinite		$	30		$	-

¹ Theseobligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

² At Consumers, this obligation comprises a guarantee provided to the DOE in connection with a settlement agreement regarding damages resulting from the DOE’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the DOE and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee. For additional details on this guarantee, see Note 19, Variable Interest Entities.

Purchase Obligations

In Millions
	Payments Due
	Total			2016			2017			2018			2019			2020			Beyond  2020
CMS Energy, including Consumers
Total PPAs		$	9,947		$	999		$	1,027		$	969		$	1,003		$	995		$	4,954
Other			2,200			904			580			251			111			63			291
Consumers
PPAs
MCV PPA		$	3,003		$	335		$	345		$	277		$	321		$	296		$	1,429
Palisades PPA			2,327			342			352			363			374			387			509
Related party PPAs			977			82			82			82			85			87			559
Other PPAs			3,640			240			248			247			223			225			2,457
Total PPAs		$	9,947		$	999		$	1,027		$	969		$	1,003		$	995		$	4,954
Other			1,908			870			551			224			83			34			146

Consumers Energy Company [Member]

Site Contingency [Line Items]

Expected Remediation Cost By Year

In Millions
	2016			2017			2018			2019			2020
Consumers
Remediation and other response activity costs		$	14		$	19		$	11		$	14		$	19

Guarantees

In Millions
			Maximum			Carrying
Guarantee Description	Issue Date	Expiration Date	Obligation			Amount
CMS Energy, including Consumers
Indemnity obligations from stock and    asset sale agreements1	Various	Indefinite		$	143		$	7
Guarantees2	Various	Indefinite			51			-
Consumers
Guarantee2	July 2011	Indefinite		$	30		$	-

¹ Theseobligations arose from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy indemnified the purchaser for losses resulting from various matters, primarily claims related to taxes. CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.

² At Consumers, this obligation comprises a guarantee provided to the DOE in connection with a settlement agreement regarding damages resulting from the DOE’s failure to accept spent nuclear fuel from nuclear power plants formerly owned by Consumers. At CMS Energy, the guarantee obligations comprise Consumers’ guarantee to the DOE and CMS Energy’s 1994 guarantee of non-recourse revenue bonds issued by Genesee. For additional details on this guarantee, see Note 19, Variable Interest Entities.

Purchase Obligations

In Millions
	Payments Due
	Total			2016			2017			2018			2019			2020			Beyond  2020
CMS Energy, including Consumers
Total PPAs		$	9,947		$	999		$	1,027		$	969		$	1,003		$	995		$	4,954
Other			2,200			904			580			251			111			63			291
Consumers
PPAs
MCV PPA		$	3,003		$	335		$	345		$	277		$	321		$	296		$	1,429
Palisades PPA			2,327			342			352			363			374			387			509
Related party PPAs			977			82			82			82			85			87			559
Other PPAs			3,640			240			248			247			223			225			2,457
Total PPAs		$	9,947		$	999		$	1,027		$	969		$	1,003		$	995		$	4,954
Other			1,908			870			551			224			83			34			146

Bay Harbor [Member]

Site Contingency [Line Items]

Expected Remediation Cost By Year

In Millions
	2016			2017			2018			2019			2020
CMS Energy
Long-term liquid disposal and operating and maintenance costs		$	6		$	5		$	5		$	5		$	4