Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Schedule of Fair Value of Derivative Instruments

In Millions
	Derivative Assets					Derivative Liabilities
	Balance	Fair Value at				Balance	Fair Value at
	Sheet	June 30,		December 31,		Sheet	June 30,		December 31,
	Location	2011		2010		Location	2011		2010
CMS Energy, including Consumers
Derivatives not designated as hedging instruments
Commodity contracts1	Other assets	$	3	$	1	Other liabilities2	$	3	$	4
Consumers
Derivatives not designated as hedging instruments
Commodity contracts	Other assets	$	3	$	1	Other liabilities	$	—	$	—

1	Assets and liabilities are presented gross and exclude the impact of offsetting derivative assets and liabilities under master netting agreements, which was less than $1 million at June 30, 2011 and December 31, 2010.
2	Liabilities exclude the impact of offsetting cash margin deposits paid by CMS ERM to other parties, which was less than $1 million at June 30, 2011 and December 31, 2010. CMS Energy presents these liabilities net of these impacts on its consolidated balance sheets.

Gain/(Loss) Recognized in Income for Derivative Instruments

In Millions
	Amount of Gain (Loss) on Derivatives Recognized in Income
Location of Gain (Loss) on	Three Months Ended June 30						Six Months Ended June 30
Derivatives Recognized in Income	2011			2010			2011		2010
CMS Energy, including Consumers
Commodity contracts
Operating revenue	$	(1	)	$	(2	)	$	—	$	3
Fuel for electric generation		—			—			—		2
Purchased and interchange power		—			—			—		1
Total CMS Energy	$	(1	)	$	(2	)	$	—	$	6

Consumers Energy Company [Member]

Schedule of Fair Value of Derivative Instruments

In Millions
	Derivative Assets					Derivative Liabilities
	Balance	Fair Value at				Balance	Fair Value at
	Sheet	June 30,		December 31,		Sheet	June 30,		December 31,
	Location	2011		2010		Location	2011		2010
CMS Energy, including Consumers
Derivatives not designated as hedging instruments
Commodity contracts1	Other assets	$	3	$	1	Other liabilities2	$	3	$	4
Consumers
Derivatives not designated as hedging instruments
Commodity contracts	Other assets	$	3	$	1	Other liabilities	$	—	$	—

1	Assets and liabilities are presented gross and exclude the impact of offsetting derivative assets and liabilities under master netting agreements, which was less than $1 million at June 30, 2011 and December 31, 2010.
2	Liabilities exclude the impact of offsetting cash margin deposits paid by CMS ERM to other parties, which was less than $1 million at June 30, 2011 and December 31, 2010. CMS Energy presents these liabilities net of these impacts on its consolidated balance sheets.