Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2017

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	March 31, 2017															December 31, 2016
				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		$	18		$	18		$	-		$	-		$	18		$	22		$	22		$	-		$	-		$	22
Notes    receivable2			1,288			1,373			-			-			1,373			1,326			1,415			-			-			1,415
Securities held    to maturity			12			12			-			12			-			13			13			-			13			-
Liabilities
Long-term    debt3			9,919			10,345			-			9,367			978			9,504			9,953			-			8,990			963
Long-term    payables4			18			18			-			-			18			17			17			-			-			17
Consumers
Assets
Long-term    receivables1		$	18		$	18		$	-		$	-		$	18		$	22		$	22		$	-		$	-		$	22
Notes    receivable5			45			45			-			-			45			45			45			-			-			45
Liabilities
Long-term    debt6			5,724			5,999			-			5,021			978			5,628			5,903			-			4,940			963

¹ Includes current accounts receivable of $12 million at March 31, 2017 and December 31, 2016.

² Includes current portion of notes receivable of $205 million at March 31, 2017 and $219 million at December 31, 2016.

³ Includes current portion of long-term debt of $790 million at March 31, 2017 and $864 million at December 31, 2016.

⁴ Includes current portion of long-term payables of $1 million at March 31, 2017 and December 31, 2016.

⁵ Includes current portion of notes receivable of $29 million at March 31, 2017 and December 31, 2016.

⁶ Includes current portion of long-term debt of $305 million at March 31, 2017 and $375 million at December 31, 2016.

Schedule Of Investment Securities

In Millions
	March 31, 2017												December 31, 2016
				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		$	142		$	1		$	-		$	143		$	141		$	-		$	-		$	141
Held to maturity
Debt securities			12			-			-			12			13			-			-			13
Consumers
Available for sale
DB SERP
Mutual funds		$	102		$	-		$	-		$	102		$	102		$	-		$	-		$	102
CMS Energy    common stock			2			18			-			20			4			29			-			33

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

In Millions
	March 31, 2017															December 31, 2016
				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		$	18		$	18		$	-		$	-		$	18		$	22		$	22		$	-		$	-		$	22
Notes    receivable2			1,288			1,373			-			-			1,373			1,326			1,415			-			-			1,415
Securities held    to maturity			12			12			-			12			-			13			13			-			13			-
Liabilities
Long-term    debt3			9,919			10,345			-			9,367			978			9,504			9,953			-			8,990			963
Long-term    payables4			18			18			-			-			18			17			17			-			-			17
Consumers
Assets
Long-term    receivables1		$	18		$	18		$	-		$	-		$	18		$	22		$	22		$	-		$	-		$	22
Notes    receivable5			45			45			-			-			45			45			45			-			-			45
Liabilities
Long-term    debt6			5,724			5,999			-			5,021			978			5,628			5,903			-			4,940			963

¹ Includes current accounts receivable of $12 million at March 31, 2017 and December 31, 2016.

² Includes current portion of notes receivable of $205 million at March 31, 2017 and $219 million at December 31, 2016.

³ Includes current portion of long-term debt of $790 million at March 31, 2017 and $864 million at December 31, 2016.

⁴ Includes current portion of long-term payables of $1 million at March 31, 2017 and December 31, 2016.

⁵ Includes current portion of notes receivable of $29 million at March 31, 2017 and December 31, 2016.

⁶ Includes current portion of long-term debt of $305 million at March 31, 2017 and $375 million at December 31, 2016.

Schedule Of Investment Securities

In Millions
	March 31, 2017												December 31, 2016
				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		$	142		$	1		$	-		$	143		$	141		$	-		$	-		$	141
Held to maturity
Debt securities			12			-			-			12			13			-			-			13
Consumers
Available for sale
DB SERP
Mutual funds		$	102		$	-		$	-		$	102		$	102		$	-		$	-		$	102
CMS Energy    common stock			2			18			-			20			4			29			-			33