Stock-Based Compensation (Summary of the Company's Option Activity) (Details) (Stock Option [Member], USD $)	12 Months Ended
Dec. 31, 2012
Stock Option [Member]
Outstanding as of January 1, 2012	6,376,244
Granted	1,237,172
Exercised	(1,614,657)
Forfeited	(162,839)
Expired	(5,975)
Outstanding as of December 31, 2012	5,829,945
Exercisable as of December 31, 2012	3,170,504
Vested or expected to vest as of December 31, 2012	5,829,945
Weighted-Average exercise price option at beginning	$ 37.36
Grants in Period	$ 62.22
Exercises in Period	$ 31.53
Forfeitures In Period	$ 44.19
Expirations in Period	$ 9.74
Weighted-Average exercise price option at ending	$ 44.09
Weighted Average exercise price Exercisable	$ 37.07
Weighted Average exercise price vested or expected to Vest	$ 44.09
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 4 months 29 days
Weighted Average contractual term Exercisable	4 years 10 months 4 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	6 years 4 months 29 days
Aggregate intrinsic value outstanding ending	$ 193.45
Aggregate intrinsic value Exercisable	127.46
Aggregate intrinsic value vested	$ 193.45

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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