Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Assets And Liabilities Measured At Fair Value On A Recurring Basis

In Millions
	CMS Energy, including Consumers						Consumers
	September 30			December 31			September 30			December 31
	2017			2016			2017			2016
Assets1
Cash equivalents		$	21		$	44		$	-		$	-
Restricted cash equivalents			27			19			27			19
CMS Energy common stock			-			-			21			33
Nonqualified deferred    compensation plan assets			13			12			9			8
DB SERP
Cash equivalents			4			3			3			2
Mutual funds			145			141			105			102
Derivative instruments
Commodity contracts			2			1			2			1
Total		$	212		$	220		$	167		$	165
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	13		$	12		$	9		$	8
Derivative instruments
Commodity contracts			1			-			1			-
Total		$	14		$	12		$	10		$	8

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

Consumers Energy Company [Member]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

In Millions
	CMS Energy, including Consumers						Consumers
	September 30			December 31			September 30			December 31
	2017			2016			2017			2016
Assets1
Cash equivalents		$	21		$	44		$	-		$	-
Restricted cash equivalents			27			19			27			19
CMS Energy common stock			-			-			21			33
Nonqualified deferred    compensation plan assets			13			12			9			8
DB SERP
Cash equivalents			4			3			3			2
Mutual funds			145			141			105			102
Derivative instruments
Commodity contracts			2			1			2			1
Total		$	212		$	220		$	167		$	165
Liabilities1
Nonqualified deferred    compensation plan liabilities		$	13		$	12		$	9		$	8
Derivative instruments
Commodity contracts			1			-			1			-
Total		$	14		$	12		$	10		$	8

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