Employee Stock-Based Compensation and Benefit Plans (Schedule of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years
Share-based Compensation [Abstract]
Options outstanding at December 31, 2010	11,668,907
Options granted	3,158,617
Options assumed	572,883
Options exercised	(3,944,381)
Options forfeited or expired	(756,121)
Options outstanding at December 31, 2011	10,699,905
Options, vested or expected to vest	10,128,946
Options exercisable at December 31, 2011	4,782,143
Weighted-average exercise price, options outstanding at December 31, 2010	$ 37.31
Weighted-average exercise price, options granted	$ 76.02
Weighted-average exercise price, options granted, options assumed	$ 12.32
Weighted-average exercise price, options exercised	$ 31.84
Weighted-average exercise price, options forfeited or expired	$ 53.61
Weighted-average exercise price, options outstanding at December 31, 2011	$ 48.06
Weighted-average exercise price, options vested or expected to vest	$ 47.34
Weighted-average exercise price, options exercisable at December 31, 2011	$ 34.23
Weighted-average remaining contractual life, beginning of period (in years)	3.21
Weighted-average remaining contractual life, end of period (in years)	3.24
Weighted-average remaining contractual life, vested or expected to vest (in years)	3.18
Weighted-average remaining contractual life, exercisable at December 31, 2011 (in years)	2.20
Aggregate intrinsic value, options outstanding	$ 186,254
Aggregate intrinsic value, options vested or expected to vest	181,099
Aggregate intrinsic value, options exercisable at December 31, 2011	$ 128,380