Stock-Based Compensation (Details) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended				0 Months Ended		12 Months Ended
	Dec. 31, 2013 Restricted Stock Units And Performance Based Restricted Stock Units [Member]		Dec. 31, 2012 Restricted Stock Units And Performance Based Restricted Stock Units [Member]	Dec. 31, 2011 Restricted Stock Units And Performance Based Restricted Stock Units [Member]	May 21, 2013 Employee Stock Option [Member]	Dec. 31, 2013 Employee Stock Option [Member]		Dec. 31, 2012 Employee Stock Option [Member]	Dec. 31, 2011 Employee Stock Option [Member]	May 07, 2013 Performance Shares (PRSUs) [Member]	Jul. 31, 2012 Performance Shares (PRSUs) [Member]	Dec. 31, 2013 Performance Shares (PRSUs) [Member]	Dec. 31, 2013 2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term for stock-based awards granted under the Equity plan (in years)						10 years
Vesting period for stock-based awards granted under the Equity Plan (in years)												3 years	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Minimum												0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage, Maximum												200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized													28,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant													18,800,000
RSUs and PRSUs, Number of shares
Outstanding, December 31, 2012	6,960,000
Grants	2,794,000				55,931					262,647	66,489
Vested	(2,685,000)
Forfeited	(677,000)
Outstanding, December 31, 2013	6,392,000		6,960,000
Vested and expected to vest, December 31, 2013	5,671,000
RSUs and PRUs, Weighted Average Grant Date Fair Value Per Share (in dollars per share)
Outstanding, December 31, 2012	$ 34.03
Grants	$ 33.21				$ 24.42					$ 33.03	$ 41.18
Vested	$ 31.11
Forfeited	$ 35.00
Outstanding, December 31, 2013	$ 34.80		$ 34.03
Vested and expected to vest, December 31, 2013	$ 34.80
Outstanding, Weighted-average remaining contractual term (in years)	1 year 6 months
Outstanding, aggregate intrinsic value	$ 207,818,000	[1]
Vested and expected to vest, weighted-average remaining contractual term (in years)	1 year 5 months
Vested and expected to vest, Aggregate intrinsic value	184,371,000	[1]
Share Options, Number of Shares
Outstanding, December 31, 2012						5,163,000
Grants						94,000
Exercises						(1,792,000)		(1,700,000)	(4,800,000)
Forfeited/Cancelled/Expired						(19,000)
Outstanding, December 31, 2013						3,446,000		5,163,000
Exercisable, December 31, 2013						2,431,000
Vested and expected to vest, December 31, 2013						3,347,000
Stock Options, Weighted Average Exercise Price Per Share (in dollars per share)
Outstanding, December 31, 2012						$ 25.81
Grants						$ 19.14
Exercises						$ 21.01
Forfeited/Cancelled/Expired						$ 28.61
Outstanding, December 31, 2013						$ 28.11		$ 25.81
Exercisable, December 31, 2013						$ 24.74
Vested and expected to vest, December 31, 2013						$ 27.90
Outstanding, Weighted-average remaining contractual term (in years)						4 years 5 months
Exercisable, Weighted-average remaining contractual term (in years)						3 years 0 months
Vested and expected to vest, Weighted-average remaining contractual term (in years)						4 years 4 months
Outstanding, Aggregate intrinsic value						24,076,000	[2]
Exercisable, Aggregate intrinsic value						23,018,000	[2]
Vested and expected to vest, Aggregate intrinsic value						23,982,000	[2]
Total fair value of RSUs and PRSUs vested and expensed during the period	85,400,000		81,000,000	71,800,000
Intrinsic value of stock options exercised						24,000,000		30,600,000	97,700,000
Cash received from exercise of stock options						37,600,000		31,200,000	102,300,000
Total fair value of stock options vested and expensed during the period						$ 5,300,000		$ 4,900,000	$ 4,700,000

[1] Aggregate intrinsic value represents the closing price per share of our stock on December 31, 2013, multiplied by the number of RSUs and market-based PRSUs outstanding or vested and expected to vest as of December 31, 2013.

[2] For those stock options with an exercise price below the closing price per share on December 31, 2013, aggregate intrinsic value represents the difference between the exercise price and the closing price per share of our common stock on December 31, 2013, multiplied by the number of stock options outstanding, exercisable, or vested and expected to vest as of December 31, 2013.