Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Nonvested Restricted Stock Units Activity

The following table summarizes our restricted stock unit activity for the nine months ended September 30, 2015 (in millions):

	Number of Units		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2014	17.4		$	285
Units granted	8.7		400
Units vested	(3.8	)	244
Units forfeited	(2.2	)	312
Outstanding as of September 30, 2015	20.1		$	339

Nonvested Share Activity

Scheduled vesting for outstanding restricted stock units as of September 30, 2015, is as follows (in millions):

	Three Months Ended December 31,	Year Ended December 31,
	2015	2016	2017	2018	2019	Thereafter	Total
Scheduled vesting—restricted stock units	1.8	6.5	6.9	3.3	1.3	0.3	20.1