Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2016

Share-based Compensation [Abstract]

Schedule of Stock Based Compensation Expense

Stock-based compensation expense consists of the following:

(In millions)	For the Three Months Ended   June 30,				For the Six Months Ended   June 30,
	2016		2015		2016		2015
Restricted stock	$	0.7	$	0.7	$	1.4	$	1.7
Restricted stock units	1.0		1.9		2.4		5.0
Total	$	1.7	$	2.6	$	3.8	$	6.7

Summary of Restricted Stock Activity

A summary of the non-vested restricted stock activity is presented below:

Restricted Stock	Number of Shares		Weighted Average Grant-Date Fair Value Per Share
Non-vested as of December 31, 2015	182,311		$	109.17
Granted	7,657		196.96
Vested	(20,408	)	115.74
Forfeited	(395	)	187.17
Non-vested as of June 30, 2016	169,165		$	112.17

Summary of Restricted Stock Units Activity

A summary of the restricted stock unit activity is presented below:

Restricted Stock Units	Number of Restricted Stock Units		Weighted Average Grant-Date Fair Value Per Share
Outstanding as of December 31, 2015	859,419		$	61.73
Granted	250		178.96
Converted	(404,096	)	16.73
Outstanding as of June 30, 2016	455,573		$	101.70