Common Stock, Preferred Stock and Equity Plans (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock options outstanding and exercisable
Exercise price range, options outstanding (in shares)		15,729,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		6 years 8 months 1 day
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 44.40
Exercise price range, options exercisable (in shares)		7,950,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 38.84
Restricted stock
Restricted stock, as of the beginning of the period (in shares)		2,270,000
Restricted stock, granted (in shares)		1,356,000
Restricted stock, vested (in shares)		(800,000)
Restricted stock, cancelled (in shares)		(780,000)
Restricted stock, as of the end of the period (in shares)	2,270,000	2,046,000	2,270,000
Restricted stock, weighted-average grant-date fair value
Weighted-average grant-date fair value, as of the beginning of the period (in dollars per share)		$ 42.92
Weighted-average grant-date fair value, granted (in dollars per share)		$ 62.16
Weighted-average grant-date fair value, vested (in dollars per share)		$ 42.27
Weighted-average grant-date fair value, cancelled (in dollars per share)		$ 51.47
Weighted-average grant-date fair value, as of the end of the period (in dollars per share)	$ 42.92	$ 52.66	$ 42.92
Vested in period, total fair value	$ 50.9		$ 41.1	$ 34.6
Range of Exercise Prices, $9.07-$20.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 9.09
Exercise price, high end of range (usd per share)		$ 20.00
Exercise price range, options outstanding (in shares)		432,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		2 years 4 months 13 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 15.37
Exercise price range, options exercisable (in shares)		432,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 15.37
Range of Exercise Prices, $20.01-$30.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 20.01
Exercise price, high end of range (usd per share)		$ 30
Exercise price range, options outstanding (in shares)		1,055,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		5 years 8 months 27 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 29.38
Exercise price range, options exercisable (in shares)		812,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 29.23
Range of Exercise Prices, $30.01-$40.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 30.01
Exercise price, high end of range (usd per share)		$ 40.00
Exercise price range, options outstanding (in shares)		6,842,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		5 years 26 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 36.55
Exercise price range, options exercisable (in shares)		4,773,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 36.06
Range of Exercise Prices, $40.01-$50.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 40.01
Exercise price, high end of range (usd per share)		$ 50.00
Exercise price range, options outstanding (in shares)		4,136,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		8 years 8 months 27 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 46.32
Exercise price range, options exercisable (in shares)		787,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 46.62
Range of Exercise Prices, $50.01-$60.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 50.01
Exercise price, high end of range (usd per share)		$ 60.00
Exercise price range, options outstanding (in shares)		1,713,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		7 years 1 month 28 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 53.78
Exercise price range, options exercisable (in shares)		874,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 54.35
Price Range From Dollars $60.01-$70.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 60.01
Exercise price, high end of range (usd per share)		$ 70.00
Exercise price range, options outstanding (in shares)		80,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		9 years 29 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 65.54
Exercise price range, options exercisable (in shares)		14,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 63.20
Price Range From Dollars $70.01 to $80.00
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 70.01
Exercise price, high end of range (usd per share)		$ 80.00
Exercise price range, options outstanding (in shares)		87,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		9 years 3 months 22 days
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 77.55
Exercise price range, options exercisable (in shares)		9,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 77.73
Price Range From Dollars $80.01 to $88.18
Stock options outstanding and exercisable
Exercise price, low end of range (usd per share)		$ 80.01
Exercise price, high end of range (usd per share)		$ 88.18
Exercise price range, options outstanding (in shares)		1,384,000
Exercise price range, options outstanding, weighted-average remaining contractual life (in years)		9 years 6 months
Exercise price range, options outstanding, weighted-average exercise price (in dollars per share)		$ 83.11
Exercise price range, options exercisable (in shares)		249,000
Exercise price range, options exercisable, weighted-average exercise price (in dollars per share)		$ 82.13
Employee Stock Purchase Plan
Employee Stock Purchase Plan
Offering period		12 months
Number of purchase periods (purchase periods)		2
Duration of purchase period		6 months
Eligible employee purchase price percentage of fair value		85.00%
Number of shares authorized (shares)		1,753,381
Number of shares (shares)		527,000
Average price paid per share (usd per share)		$ 36.21