Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Schedule Of Restricted Stock Activity

	CMS Energy, including Consumers				Consumers
Year Ended December 31, 2015	Number of  Shares	Weighted-Average  Grant Date Fair Value  per Share			Number of  Shares	Weighted-Average  Grant Date Fair Value  per Share
Nonvested at beginning of period	1,679,595		$	24.69	1,614,684		$	24.71
Granted
Restricted stock	789,602			36.84	750,262			36.83
Restricted stock units	13,180			34.25	12,837			34.25
Vested - restricted stock	(793,103)			27.76	(756,286)			27.74
Forfeited - restricted stock	(64,340)			26.93	(63,840)			26.93
Nonvested at end of period	1,624,934		$	29.08	1,557,657		$	29.06

Year Ended December 31, 2015	CMS Energy, including  Consumers	Consumers
Granted
Time-lapse awards	152,820	146,536
Market-based awards	158,385	149,909
Performance-based awards	158,385	149,909
Restricted stock units	12,848	12,514
Dividends on market-based awards	22,208	21,129
Dividends on performance-based awards	11,046	10,502
Dividends on restricted stock units	332	323
Additional market-based shares based on achievement of condition	286,758	272,277
Total granted	802,782	763,099

Schedule of Share-based Payment Award, Restricted Stock, Valuation Assumptions

Years Ended December 31	2015			2014			2013
Expected volatility		14.1	%		15.6	%		17.4	%
Expected dividend yield		3.3			3.7			3.9
Risk-free rate		0.8			0.8			0.4

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value

Years Ended December 31	2015			2014			2013
CMS Energy, including Consumers
Weighted-average grant-date fair value per share
Restricted stock granted		$	36.84		$	26.15		$	16.65
Restricted stock units granted			34.25			-			-
Consumers
Weighted-average grant-date fair value per share
Restricted stock granted		$	36.83		$	26.18		$	16.76
Restricted stock units granted			34.25			-			-

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

In Millions
Years Ended December 31	2015			2014			2013
CMS Energy, including Consumers
Fair value of shares that vested during the year		$	29		$	16		$	10
Compensation expense recognized			20			14			14
Income tax benefit recognized			8			5			5
Consumers
Fair value of shares that vested during the year		$	28		$	15		$	9
Compensation expense recognized			19			13			14
Income tax benefit recognized			7			5			5

Consumers Energy Company [Member]

Schedule Of Restricted Stock Activity

	CMS Energy, including Consumers				Consumers
Year Ended December 31, 2015	Number of  Shares	Weighted-Average  Grant Date Fair Value  per Share			Number of  Shares	Weighted-Average  Grant Date Fair Value  per Share
Nonvested at beginning of period	1,679,595		$	24.69	1,614,684		$	24.71
Granted
Restricted stock	789,602			36.84	750,262			36.83
Restricted stock units	13,180			34.25	12,837			34.25
Vested - restricted stock	(793,103)			27.76	(756,286)			27.74
Forfeited - restricted stock	(64,340)			26.93	(63,840)			26.93
Nonvested at end of period	1,624,934		$	29.08	1,557,657		$	29.06

Year Ended December 31, 2015	CMS Energy, including  Consumers	Consumers
Granted
Time-lapse awards	152,820	146,536
Market-based awards	158,385	149,909
Performance-based awards	158,385	149,909
Restricted stock units	12,848	12,514
Dividends on market-based awards	22,208	21,129
Dividends on performance-based awards	11,046	10,502
Dividends on restricted stock units	332	323
Additional market-based shares based on achievement of condition	286,758	272,277
Total granted	802,782	763,099

Schedule of Share-based Payment Award, Restricted Stock, Valuation Assumptions

Years Ended December 31	2015			2014			2013
Expected volatility		14.1	%		15.6	%		17.4	%
Expected dividend yield		3.3			3.7			3.9
Risk-free rate		0.8			0.8			0.4

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value

Years Ended December 31	2015			2014			2013
CMS Energy, including Consumers
Weighted-average grant-date fair value per share
Restricted stock granted		$	36.84		$	26.15		$	16.65
Restricted stock units granted			34.25			-			-
Consumers
Weighted-average grant-date fair value per share
Restricted stock granted		$	36.83		$	26.18		$	16.76
Restricted stock units granted			34.25			-			-

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

In Millions
Years Ended December 31	2015			2014			2013
CMS Energy, including Consumers
Fair value of shares that vested during the year		$	29		$	16		$	10
Compensation expense recognized			20			14			14
Income tax benefit recognized			8			5			5
Consumers
Fair value of shares that vested during the year		$	28		$	15		$	9
Compensation expense recognized			19			13			14
Income tax benefit recognized			7			5			5