Stock Transactions and Stock-Based Compensation (Option Activity Under The Company's Stock Plans) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year, Shares	32,454		34,820	38,794
Granted, Shares	4,268		3,807	4,425
Exercised, Shares	(8,133)		(4,488)	(7,028)
Cancelled/forfeited, Shares	(1,217)		(1,685)	(1,371)
Outstanding at end of year, Shares	27,372		32,454	34,820
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of year, Weighted Average Exercise Price	$ 32.98		$ 30.31	$ 27.57
Granted, Weighted Average Exercise Price	$ 52.21		$ 50.02	$ 38.26
Exercised, Weighted Average Exercise Price	$ 25.25		$ 25.73	$ 19.49
Cancelled, Weighted Average Exercise Price	$ 40.52		$ 35.62	$ 33.62
Outstanding at end of year, Weighted Average Exercise Price	$ 37.94		$ 32.98	$ 30.31
Outstanding at December 31, 2012, Weighted Average Remaining Contractual Term (in Years)	6 years
Outstanding at December 31, 2012, Aggregate Intrinsic Value	$ 491,528
Vested and Expected to Vest at December 31, 2012, Shares	26,590	[1]
Vested and Expected to Vest at December 31, 2012, Weighted Average Exercise Price	$ 37.67	[1]
Vested and Expected to Vest at December 31, 2012, Weighted Average Remaining Contractual Term (in Years)	6 years	[1]
Vested and Expected to Vest at December 31, 2012, Aggregate Intrinsic Value	484,806	[1]
Vested as of December 31, 2012, Shares	14,673
Vested as of December 31, 2012, Weighted Average Exercise Price	$ 32.91
Vested as of December 31, 2012, Weighted Average Remaining Contractual Term (in Years)	4 years
Vested as of December 31, 2012, Aggregate Intrinsic Value	$ 337,339

[1] The “Expected to Vest” options are the net unvested options that remain after applying the pre-vesting forfeiture rate assumption to total unvested options