Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Nonvested Restricted Stock Units Activity

The following table summarizes our restricted stock unit activity for the three months ended March 31, 2015 (in millions):

	Number of Units		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2014	17.4		$	285
Units granted	1.4		359
Units vested	(0.8	)	216
Units forfeited	(0.6	)	289
Outstanding as of March 31, 2015	17.4		$	294

Nonvested Share Activity

Scheduled vesting for outstanding restricted stock units as of March 31, 2015, is as follows (in millions):

	Nine Months Ended December 31,	Year Ended December 31,
	2015	2016	2017	2018	2019	Thereafter	Total
Scheduled vesting—restricted stock units	4.9	6.0	3.7	2.1	0.5	0.2	17.4