Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2013

Nonvested Restricted Stock Units Activity

The following table summarizes our restricted stock unit activity for the six months ended June 30, 2013 (in millions):

	Number of Units			Weighted Average Grant-Date Fair Value
Outstanding at December 31, 2012		15.4		$	184
Units granted		4.7			260
Units vested		(2.3	)		152
Units forfeited		(0.9	)		201
Outstanding at June 30, 2013		16.9		$	209

Nonvested Share Activity

Scheduled vesting for outstanding restricted stock units at June 30, 2013, is as follows (in millions):

	Six Months Ended December 31,		Year Ended December 31,
	2013		2014		2015		2016		2017		Thereafter		Total
Scheduled vesting—restricted stock units		2.3		5.4		5.5		2.5		0.9		0.3		16.9