Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2014

Equity [Abstract]

Nonvested Restricted Stock Units Activity

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

	Number of Units		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2013	16.3		$	233
Units granted	5.1		332
Units vested	(2.6	)	192
Units forfeited	(1.2	)	251
Outstanding as of June 30, 2014	17.6		$	266

Nonvested Share Activity

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

	Six Months Ended December 31,	Year Ended December 31,
	2014	2015	2016	2017	2018	Thereafter	Total
Scheduled vesting—restricted stock units	2.6	5.9	5.7	2.4	0.7	0.3	17.6