Stock-Based Compensation (Option Activity Under The Company's Stock Plans) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2011
Stock-Based Compensation
Outstanding at December 31, 2010, Shares	34,820
Outstanding at December 31, 2010, Weighted Average Exercise Price	$ 30.31
Granted, Shares	3,466
Granted, Weighted Average Exercise Price	$ 50.15
Exercised, Shares	(3,012)
Exercised, Weighted Average Exercise Price	$ 25.52
Cancelled / Forfeited, Shares	(1,389)
Cancelled / Forfeited, Weighted Average Exercise Price	$ 35.07
Outstanding at September 30, 2011, Shares	33,885
Outstanding at September 30, 2011, Weighted Average Exercise Price	$ 32.57
Outstanding at September 30, 2011, Weighted Average Remaining Contractual Term (in Years)	6
Outstanding at September 30, 2011, Aggregate Intrinsic Value	$ 346.0
Vested and Expected to Vest at September 30, 2011, Shares	33,026
Vested and Expected to Vest at September 30, 2011, Weighted Average Exercise Price	$ 32.33
Vested and Expected to Vest at September 30, 2011, Weighted Average Remaining Contractual Term (in Years)	6
Vested and Expected to Vest at September 30, 2011, Aggregate Intrinsic Value	343.0
Vested and Exercisable at September 30, 2011, Shares	20,456
Vested and Exercisable at September 30, 2011, Weighted Average Exercise Price	$ 28.44
Vested and Exercisable at September 30, 2011, Weighted Average Remaining Contractual Term (in Years)	4
Vested and Exercisable at September 30, 2011, Aggregate Intrinsic Value	$ 276.0