Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Activity under all stock option incentive plans

	Options Outstanding
	Number of Shares		Weighted Average Exercise Price per Share		Weighted Average Grant-Date Fair Value per Share
	(In millions, except per share data)
Balance at December 31, 2011	66		$	27.47	$	15.10
Options assumed	4		9.71		27.54
Options cancelled	(1	)	35.82		12.83
Options exercised	(9	)	16.83		11.85
Balance at September 30, 2012	60		$	27.77	$	14.93

Restricted stock unit activity

	Restricted Stock Units Outstanding
	Number of Shares		Weighted Average Grant-Date Fair Value per Share
	(In millions, except per share data)
Balance at December 31, 2011	22		$	32.88
Restricted stock units granted	12		36.07
Restricted stock units assumed	6		37.54
Restricted stock units cancelled	(1	)	34.63
Restricted stock units vested	(11	)	28.43
Balance at September 30, 2012	28		$	35.26

Per share weighted average fair value assumptions for stock options and employee stock options purchase rights

	Employee Stock Purchase Rights			Assumed Employee Stock Options
Expected life (in years)	0.72			1.39
Implied volatility	0.36			0.41
Risk-free interest rate	0.15		%	0.22		%
Expected dividend yield	1.12		%	1.00		%
Weighted average fair value	$	9.08		$	27.54

Details of total stock-based compensation expense by statement functional line

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(In millions)
Cost of product revenue	$	6	$	6	$	21	$	19
Research and development	89		85		278		284
Selling, general and administrative	33		30		116		99
	$	128	$	121	$	415	$	402

Unearned stock-based compensation estimated to be expensed related to unvested share-based payment awards

	2012		2013		2014		2015		2016		Total
					(In millions)
Unearned stock-based compensation	$	120	$	384	$	254	$	131	$	22	$	911