Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	September 30, 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
Assets
Long-term    receivables1		$	23		$	23		$	-		$	-		$	23		$	-		$	-		$	-		$	-		$	-
Notes    receivable2			1,286			1,374			-			-			1,374			1,161			1,228			-			-			1,228
Securities held    to maturity			13			14			-			14			-			11			11			-			11			-
Liabilities
Long-term    debt3			9,706			10,651			-			9,628			1,023			9,084			9,599			-			8,648			951
Long-term    payables4			22			23			-			-			23			14			14			-			-			14
Consumers
Assets
Long-term    receivables1		$	23		$	23		$	-		$	-		$	23		$	-		$	-		$	-		$	-		$	-
Notes    receivable			45			44			-			-			44			-			-			-			-			-
Liabilities
Long-term    debt5			5,640			6,232			-			5,209			1,023			5,381			5,684			-			4,733			951
Long-term    payables			6			6			-			-			6			-			-			-			-			-

¹ Includes current accounts receivable of $13 million at September 30, 2016.

² Includes current portion of notes receivable of $187 million at September 30, 2016 and $144 million at December 31, 2015.

³ Includes current portion of long-term debt of $984 million at September 30, 2016 and $684 million at December 31, 2015.

⁴ Includes current portion of long-term payables of $1 million at September 30, 2016 and December 31, 2015.

⁵ Includes current portion of long-term debt of $275 million at September 30, 2016 and $198 million at December 31, 2015.

Schedule Of Investment Securities

In Millions
	September 30, 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		$	149		$	-		$	5		$	144		$	152		$	-		$	6		$	146
Held to maturity
Debt securities			13			1			-			14			11			-			-			11
Consumers
Available for sale
DB SERP
Mutual funds		$	107		$	-		$	4		$	103		$	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
	September 30, 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
Assets
Long-term    receivables1		$	23		$	23		$	-		$	-		$	23		$	-		$	-		$	-		$	-		$	-
Notes    receivable2			1,286			1,374			-			-			1,374			1,161			1,228			-			-			1,228
Securities held    to maturity			13			14			-			14			-			11			11			-			11			-
Liabilities
Long-term    debt3			9,706			10,651			-			9,628			1,023			9,084			9,599			-			8,648			951
Long-term    payables4			22			23			-			-			23			14			14			-			-			14
Consumers
Assets
Long-term    receivables1		$	23		$	23		$	-		$	-		$	23		$	-		$	-		$	-		$	-		$	-
Notes    receivable			45			44			-			-			44			-			-			-			-			-
Liabilities
Long-term    debt5			5,640			6,232			-			5,209			1,023			5,381			5,684			-			4,733			951
Long-term    payables			6			6			-			-			6			-			-			-			-			-

¹ Includes current accounts receivable of $13 million at September 30, 2016.

² Includes current portion of notes receivable of $187 million at September 30, 2016 and $144 million at December 31, 2015.

³ Includes current portion of long-term debt of $984 million at September 30, 2016 and $684 million at December 31, 2015.

⁴ Includes current portion of long-term payables of $1 million at September 30, 2016 and December 31, 2015.

⁵ Includes current portion of long-term debt of $275 million at September 30, 2016 and $198 million at December 31, 2015.

Schedule Of Investment Securities

In Millions
	September 30, 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		$	149		$	-		$	5		$	144		$	152		$	-		$	6		$	146
Held to maturity
Debt securities			13			1			-			14			11			-			-			11
Consumers
Available for sale
DB SERP
Mutual funds		$	107		$	-		$	4		$	103		$	108		$	-		$	4		$	104
CMS Energy    common stock			4			30			-			34			4			25			-			29