Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Assets And Liabilities Measured At Fair Value On A Recurring Basis

In Millions
	CMS Energy, including Consumers						Consumers
December 31	2016			2015			2016			2015
Assets1
Cash equivalents		$	44		$	158		$	-		$	-
Restricted cash equivalents			19			19			19			19
CMS Energy common stock			-			-			33			29
Nonqualified deferred    compensation plan assets			12			10			8			7
DB SERP
Cash equivalents			3			2			2			2
Mutual funds			141			146			102			104
Derivative instruments
Commodity contracts			1			1			1			1
Total		$	220		$	336		$	165		$	162
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	12		$	10		$	8		$	7
Total		$	12		$	10		$	8		$	7

¹ All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Level 3 Inputs

In Millions
Years Ended December 31	2016			2015			2014
CMS Energy, including Consumers
Balance at beginning of period		$	1		$	1		$	4
Total gains (losses) included in earnings1			1			(1)			-
Total gains (losses) offset through regulatory accounting			(2)			2			(15)
Purchases			2			1			(1)
Settlements			(1)			(2)			13
Balance at end of period		$	1		$	1		$	1
Consumers
Balance at beginning of period		$	1		$	1		$	4
Total gains included in earnings1			1			-			-
Total gains (losses) offset through regulatory accounting			(2)			2			(15)
Purchases			2			-			(1)
Settlements			(1)			(2)			13
Balance at end of period		$	1		$	1		$	1

¹ CMS Energy and Consumers record realized gains and losses for Level 3 recurring fair value measurements in earnings as a component of maintenance and other operating expenses or purchased and interchange power on their consolidated statements of income.

Consumers Energy Company [Member]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

In Millions
	CMS Energy, including Consumers						Consumers
December 31	2016			2015			2016			2015
Assets1
Cash equivalents		$	44		$	158		$	-		$	-
Restricted cash equivalents			19			19			19			19
CMS Energy common stock			-			-			33			29
Nonqualified deferred    compensation plan assets			12			10			8			7
DB SERP
Cash equivalents			3			2			2			2
Mutual funds			141			146			102			104
Derivative instruments
Commodity contracts			1			1			1			1
Total		$	220		$	336		$	165		$	162
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	12		$	10		$	8		$	7
Total		$	12		$	10		$	8		$	7

¹ All assets and liabilities were classified as Level 1 with the exception of some commodity contracts, which were classified as Level 3.

Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Level 3 Inputs

In Millions
Years Ended December 31	2016			2015			2014
CMS Energy, including Consumers
Balance at beginning of period		$	1		$	1		$	4
Total gains (losses) included in earnings1			1			(1)			-
Total gains (losses) offset through regulatory accounting			(2)			2			(15)
Purchases			2			1			(1)
Settlements			(1)			(2)			13
Balance at end of period		$	1		$	1		$	1
Consumers
Balance at beginning of period		$	1		$	1		$	4
Total gains included in earnings1			1			-			-
Total gains (losses) offset through regulatory accounting			(2)			2			(15)
Purchases			2			-			(1)
Settlements			(1)			(2)			13
Balance at end of period		$	1		$	1		$	1

¹ CMS Energy and Consumers record realized gains and losses for Level 3 recurring fair value measurements in earnings as a component of maintenance and other operating expenses or purchased and interchange power on their consolidated statements of income.