Stock-Based Compensation (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2012
Options outstanding and exercisable for stock-based payment awards
Options Outstanding, Number Outstanding (in shares)	6,408,515
Options Outstanding, Weighted Average Contractual Life Remaining	7 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 38.30
Options Exercisable, Number Exercisable (in shares)	2,683,320
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 31.34
$11.85 - $29.03
Options outstanding and exercisable for stock-based payment awards
Range of Exercise Prices, Minimum (in dollars per share)	$ 11.85
Range of Exercise Prices, Maximum (in dollars per share)	$ 29.03
Options Outstanding, Number Outstanding (in shares)	1,394,052
Options Outstanding, Weighted Average Contractual Life Remaining	5 years 6 months
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 26.05
Options Exercisable, Number Exercisable (in shares)	1,108,933
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 26.03
$29.12 - $34.48
Options outstanding and exercisable for stock-based payment awards
Range of Exercise Prices, Minimum (in dollars per share)	$ 29.12
Range of Exercise Prices, Maximum (in dollars per share)	$ 34.48
Options Outstanding, Number Outstanding (in shares)	1,335,042
Options Outstanding, Weighted Average Contractual Life Remaining	6 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 31.39
Options Exercisable, Number Exercisable (in shares)	796,788
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 31.37
$34.51 - $37.68
Options outstanding and exercisable for stock-based payment awards
Range of Exercise Prices, Minimum (in dollars per share)	$ 34.51
Range of Exercise Prices, Maximum (in dollars per share)	$ 37.68
Options Outstanding, Number Outstanding (in shares)	1,953,665
Options Outstanding, Weighted Average Contractual Life Remaining	8 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 36.47
Options Exercisable, Number Exercisable (in shares)	551,483
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 36.01
$37.85 - $67.24
Options outstanding and exercisable for stock-based payment awards
Range of Exercise Prices, Minimum (in dollars per share)	$ 37.85
Range of Exercise Prices, Maximum (in dollars per share)	$ 67.24
Options Outstanding, Number Outstanding (in shares)	1,294,457
Options Outstanding, Weighted Average Contractual Life Remaining	8 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 48.53
Options Exercisable, Number Exercisable (in shares)	223,893
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 45.64
$67.38 - $91.38
Options outstanding and exercisable for stock-based payment awards
Range of Exercise Prices, Minimum (in dollars per share)	$ 67.38
Range of Exercise Prices, Maximum (in dollars per share)	$ 91.38
Options Outstanding, Number Outstanding (in shares)	431,299
Options Outstanding, Weighted Average Contractual Life Remaining	9 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 76.94
Options Exercisable, Number Exercisable (in shares)	2,223
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 68.11