Share-Based Compensation

6 Months Ended

Jun. 30, 2018

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

The Company recognized $17 million and $36 million of share-based compensation expense during the three and six months ended June 30, 2018, respectively, and $17 million and $33 million of share-based compensation expense during the three and six months ended June 30, 2017, respectively. The Company’s annual grant of share-based awards generally occurs in the first quarter. During both the six months ended June 30, 2018 and 2017, stock options to purchase 1.9 million shares were exercised.

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



	Six Months Ended June 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	1,265	$	22.43	1,335	$	18.64
Restricted stock units	501	70.14		546	57.03
Performance share units	165	75.39		110	56.91