Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	December 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
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	-		$	-		$	-		$	-		$	-
Notes    receivable2			1,326			1,415			-			-			1,415			1,161			1,228			-			-			1,228
Securities held    to maturity			13			13			-			13			-			11			11			-			11			-
Liabilities
Long-term    debt3			9,504			9,953			-			8,990			963			9,084			9,599			-			8,648			951
Long-term    payables4			17			17			-			-			17			14			14			-			-			14
Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	-		$	-		$	-		$	-		$	-
Notes    receivable5			45			45			-			-			45			-			-			-			-			-
Liabilities
Long-term    debt6			5,628			5,903			-			4,940			963			5,381			5,684			-			4,733			951

¹ Includes current accounts receivable of $12 million at December 31, 2016.

² Includes current portion of notes receivable of $219 million at December 31, 2016 and $144 million at December 31, 2015.

³ Includes current portion of long-term debt of $864 million at December 31, 2016 and $684 million at December 31, 2015.

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

⁵ Includes current portion of notes receivable of $29 million at December 31, 2016.

⁶ Includes current portion of long-term debt of $375 million at December 31, 2016 and $198 million at December 31, 2015.

Schedule Of Investment Securities

In Millions
	December 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		$	141		$	-		$	-		$	141		$	152		$	-		$	6		$	146
Held to maturity
Debt securities			13			-			-			13			11			-			-			11
Consumers
Available for sale
DB SERP
Mutual funds		$	102		$	-		$	-		$	102		$	108		$	-		$	4		$	104
CMS Energy    common stock			4			29			-			33			4			25			-			29

Schedule Of Sales Activity For Investment Securities

In Millions
Years Ended December 31	2016			2015			2014
CMS Energy, including Consumers
Proceeds from sales of investment securities		$	6		$	3		$	8
Consumers
Proceeds from sales of investment securities		$	4		$	2		$	6

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	December 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
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	-		$	-		$	-		$	-		$	-
Notes    receivable2			1,326			1,415			-			-			1,415			1,161			1,228			-			-			1,228
Securities held    to maturity			13			13			-			13			-			11			11			-			11			-
Liabilities
Long-term    debt3			9,504			9,953			-			8,990			963			9,084			9,599			-			8,648			951
Long-term    payables4			17			17			-			-			17			14			14			-			-			14
Consumers
Assets
Long-term    receivables1		$	22		$	22		$	-		$	-		$	22		$	-		$	-		$	-		$	-		$	-
Notes    receivable5			45			45			-			-			45			-			-			-			-			-
Liabilities
Long-term    debt6			5,628			5,903			-			4,940			963			5,381			5,684			-			4,733			951

¹ Includes current accounts receivable of $12 million at December 31, 2016.

² Includes current portion of notes receivable of $219 million at December 31, 2016 and $144 million at December 31, 2015.

³ Includes current portion of long-term debt of $864 million at December 31, 2016 and $684 million at December 31, 2015.

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

⁵ Includes current portion of notes receivable of $29 million at December 31, 2016.

⁶ Includes current portion of long-term debt of $375 million at December 31, 2016 and $198 million at December 31, 2015.

Schedule Of Investment Securities

In Millions
	December 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		$	141		$	-		$	-		$	141		$	152		$	-		$	6		$	146
Held to maturity
Debt securities			13			-			-			13			11			-			-			11
Consumers
Available for sale
DB SERP
Mutual funds		$	102		$	-		$	-		$	102		$	108		$	-		$	4		$	104
CMS Energy    common stock			4			29			-			33			4			25			-			29

Schedule Of Sales Activity For Investment Securities

In Millions
Years Ended December 31	2016			2015			2014
CMS Energy, including Consumers
Proceeds from sales of investment securities		$	6		$	3		$	8
Consumers
Proceeds from sales of investment securities		$	4		$	2		$	6