Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2016

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	March 31, 2016															December 31, 2015
				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		$	13		$	13		$	-		$	13		$	-		$	11		$	11		$	-		$	11		$	-
Long-term    payable1			14			15			-			-			15			14			14			-			-			14
Notes    receivable2			1,175			1,256			-			-			1,256			1,161			1,228			-			-			1,228
Long-term    debt3			9,099			9,841			-			8,856			985			9,084			9,599			-			8,648			951
Consumers
Long-term    debt4		$	5,382		$	5,853		$	-		$	4,868		$	985		$	5,381		$	5,684		$	-		$	4,733		$	951

¹ Includes current portion of long-term payable of $1 million at March 31, 2016 and December 31, 2015.

² Includes current portion of notes receivable of $151 million at March 31, 2016 and $144 million at December 31, 2015.

³ Includes current portion of long-term debt of $929 million at March 31, 2016 and $684 million at December 31, 2015.

⁴ Includes current portion of long-term debt of $448 million at March 31, 2016 and $198 million at December 31, 2015.

Schedule Of Investment Securities

In Millions
	March 31, 2016												December 31, 2015
				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		$	152		$	-		$	7		$	145		$	152		$	-		$	6		$	146
Held to maturity
Debt securities			13			-			-			13			11			-			-			11
Consumers
Available for sale
DB SERP
Mutual funds		$	109		$	-		$	5		$	104		$	108		$	-		$	4		$	104
CMS Energy    common stock			4			30			-			34			4			25			-			29

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	March 31, 2016															December 31, 2015
				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		$	13		$	13		$	-		$	13		$	-		$	11		$	11		$	-		$	11		$	-
Long-term    payable1			14			15			-			-			15			14			14			-			-			14
Notes    receivable2			1,175			1,256			-			-			1,256			1,161			1,228			-			-			1,228
Long-term    debt3			9,099			9,841			-			8,856			985			9,084			9,599			-			8,648			951
Consumers
Long-term    debt4		$	5,382		$	5,853		$	-		$	4,868		$	985		$	5,381		$	5,684		$	-		$	4,733		$	951

¹ Includes current portion of long-term payable of $1 million at March 31, 2016 and December 31, 2015.

² Includes current portion of notes receivable of $151 million at March 31, 2016 and $144 million at December 31, 2015.

³ Includes current portion of long-term debt of $929 million at March 31, 2016 and $684 million at December 31, 2015.

⁴ Includes current portion of long-term debt of $448 million at March 31, 2016 and $198 million at December 31, 2015.

Schedule Of Investment Securities

In Millions
	March 31, 2016												December 31, 2015
				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		$	152		$	-		$	7		$	145		$	152		$	-		$	6		$	146
Held to maturity
Debt securities			13			-			-			13			11			-			-			11
Consumers
Available for sale
DB SERP
Mutual funds		$	109		$	-		$	5		$	104		$	108		$	-		$	4		$	104
CMS Energy    common stock			4			30			-			34			4			25			-			29