Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2014

Equity [Abstract]

Nonvested Restricted Stock Units Activity

The following table summarizes our restricted stock unit activity for the three months ended March 31, 2014 (in millions):

	Number of Units		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2013	16.3		$	233
Units granted	0.8		366
Units vested	(0.9	)	174
Units forfeited	(0.5	)	237
Outstanding as of March 31, 2014	15.7		$	243

Nonvested Share Activity

Scheduled vesting for outstanding restricted stock units as of March 31, 2014, is as follows (in millions):

	Nine Months Ended December 31,	Year Ended December 31,
	2014	2015	2016	2017	2018	Thereafter	Total
Scheduled vesting—restricted stock units	4.5	5.7	3.4	1.8	0.2	0.1	15.7