Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities recorded at fair value on a recurring basis:

In Millions
	CMS Energy, including Consumers						Consumers
	June 30 2018			December 31  2017			June 30 2018			December 31  2017
Assets1
Cash equivalents		$	56		$	74		$	—		$	—
Restricted cash equivalents		17			17			17			17
CMS Energy common stock		—			—			1			21
Nonqualified deferred compensation plan assets		14			14			11			10
DB SERP
Cash equivalents		7			5			5			4
Debt securities		133			141			97			102
Derivative instruments
Commodity contracts		2			1			2			1
Total		$	229		$	252		$	133		$	155
Liabilities1
Nonqualified deferred compensation plan liabilities		$	14		$	14		$	11		$	10
Derivative instruments
Commodity contracts		1			1			1			—
Total		$	15		$	15		$	12		$	10

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

Consumers Energy Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

Presented in the following table are CMS Energy’s and Consumers’ assets and liabilities recorded at fair value on a recurring basis:

In Millions
	CMS Energy, including Consumers						Consumers
	June 30 2018			December 31  2017			June 30 2018			December 31  2017
Assets1
Cash equivalents		$	56		$	74		$	—		$	—
Restricted cash equivalents		17			17			17			17
CMS Energy common stock		—			—			1			21
Nonqualified deferred compensation plan assets		14			14			11			10
DB SERP
Cash equivalents		7			5			5			4
Debt securities		133			141			97			102
Derivative instruments
Commodity contracts		2			1			2			1
Total		$	229		$	252		$	133		$	155
Liabilities1
Nonqualified deferred compensation plan liabilities		$	14		$	14		$	11		$	10
Derivative instruments
Commodity contracts		1			1			1			—
Total		$	15		$	15		$	12		$	10

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