Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Nonvested Restricted Stock Units Activity

The following table summarizes our restricted stock unit activity for the nine months ended September 30, 2014 (in millions):

	Number of Units		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2013	16.3		$	233
Units granted	6.6		335
Units vested	(3.6	)	196
Units forfeited	(1.8	)	259
Outstanding as of September 30, 2014	17.5		$	276

Nonvested Share Activity

Scheduled vesting for outstanding restricted stock units as of September 30, 2014, is as follows (in millions):

	Three Months Ended December 31,	Year Ended December 31,
	2014	2015	2016	2017	2018	Thereafter	Total
Scheduled vesting—restricted stock units	1.6	5.8	5.9	2.8	1.1	0.3	17.5