Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Stock Based Compensation Activity Related to Nonvested RSUs

The following table summarizes activity related to nonvested RSUs during 2015:

	Number of RSUs (In thousands)	Weighted Average Grant-Date Fair Value Per Share
Nonvested at December 31, 2012	4,822		$    79.10
Granted	1,356		89.24
Vested	(2,093)		79.26
Forfeited	(226)		81.74
Nonvested at December 31, 2013	3,859		$    82.42
Granted	745		146.85
Vested	(2,194)		87.66
Forfeited	(84)		91.11
Nonvested at December 31, 2014	2,326		$    97.80
Granted	595		192.47
Vested	(1,642)		103.30
Forfeited	(43)		132.28
Nonvested at December 31, 2015	1,236		$  134.87

Stock Options

The following table pertains to stock options granted in 2012, in addition to stock options that vested and were exercised in 2015, 2014 and 2013 (in millions, except for weighted-average grant-date fair value of stock options granted):

	2015		2014		2013
Weighted average grant-date fair value of stock options granted	$	—	$	—	$	—
Grant-date fair value of all stock options that vested		8		18		40
Intrinsic value of all stock options exercised		265		297		293