Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	September 30, 2013															December 31, 2012
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Securities held    to maturity		$	10		$	10		$	-		$	10		$	-		$	9		$	10		$	-		$	10		$	-
Notes    receivable1			597			629			-			-			629			544			581			-			-			581
Long-term    debt2			7,600			8,354			-			7,369			985			7,229			8,347			-			7,321			1,026
Consumers
Long-term    debt3		$	4,633		$	5,046		$	-		$	4,061		$	985		$	4,338		$	5,015		$	-		$	3,989		$	1,026

¹ Includes current portion of notes receivable of $58 million at September 30, 2013 and $40 million at December 31, 2012.

² Includes current portion of long-term debt of $511 million at September 30, 2013 and $519 million at December 31, 2012.

³ Includes current portion of long-term debt of $42 million at September 30, 2013 and $41 million at December 31, 2012.

Schedule Of Investment Securities

In Millions
	September 30, 2013												December 31, 2012
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	137		$	-		$	-		$	137		$	123		$	3		$	-		$	126
Held to maturity
Debt securities			10			-			-			10			9			1			-			10
Consumers
Available for sale
DB SERP
Mutual funds		$	96		$	-		$	-		$	96		$	83		$	2		$	-		$	85
CMS Energy
common stock			5			24			-			29			6			26			-			32

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	September 30, 2013															December 31, 2012
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Securities held    to maturity		$	10		$	10		$	-		$	10		$	-		$	9		$	10		$	-		$	10		$	-
Notes    receivable1			597			629			-			-			629			544			581			-			-			581
Long-term    debt2			7,600			8,354			-			7,369			985			7,229			8,347			-			7,321			1,026
Consumers
Long-term    debt3		$	4,633		$	5,046		$	-		$	4,061		$	985		$	4,338		$	5,015		$	-		$	3,989		$	1,026

¹ Includes current portion of notes receivable of $58 million at September 30, 2013 and $40 million at December 31, 2012.

² Includes current portion of long-term debt of $511 million at September 30, 2013 and $519 million at December 31, 2012.

³ Includes current portion of long-term debt of $42 million at September 30, 2013 and $41 million at December 31, 2012.

Schedule Of Investment Securities

In Millions
	September 30, 2013												December 31, 2012
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	137		$	-		$	-		$	137		$	123		$	3		$	-		$	126
Held to maturity
Debt securities			10			-			-			10			9			1			-			10
Consumers
Available for sale
DB SERP
Mutual funds		$	96		$	-		$	-		$	96		$	83		$	2		$	-		$	85
CMS Energy
common stock			5			24			-			29			6			26			-			32