Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of stock option, restricted stock unit and performance share unit activity

A summary of stock option, restricted stock unit and performance share unit grant activity is as follows:

	Nine Months Ended September 30,
	2018			2017
	Shares Granted (In thousands)	Weighted-Average Grant Date Fair Value		Shares Granted (In thousands)	Weighted-Average Grant Date Fair Value
Stock options	1,283	$	22.48	1,417	$	18.73
Restricted stock units	525	70.62		603	57.65
Performance share units	165	75.39		110	56.91