Incentive Plans and Stock-Based Compensation (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 01, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	3,037,151
Options Outstanding - Weighted Average Exercise Price	$ 36.09
Options Outstanding - Intrinsic Value	$ 32,996
Options Outstanding - Weighted Average Remaining Life in Years	5 years 9 months 29 days
Options Exercisable - Number	2,035,267
Options Exercisable - Weighted Average Exercise Price	$ 32.54
Options Exercisable - Intrinsic Value	28,356
Options Exercisable - Weighted Average Remaining Life in Years	4 years 7 months 17 days
$16.15 - $22.80 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	136,825
Options Outstanding - Weighted Average Exercise Price	$ 21.60
Options Outstanding - Intrinsic Value	3,390
Options Outstanding - Weighted Average Remaining Life in Years	1 year
Options Exercisable - Number	136,825
Options Exercisable - Weighted Average Exercise Price	$ 21.60
Options Exercisable - Intrinsic Value	3,390
Options Exercisable - Weighted Average Remaining Life in Years	1 year
$25.31 - $38.06 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	1,931,340
Options Outstanding - Weighted Average Exercise Price	$ 31.86
Options Outstanding - Intrinsic Value	28,042
Options Outstanding - Weighted Average Remaining Life in Years	4 years 8 months 19 days
Options Exercisable - Number	1,674,783
Options Exercisable - Weighted Average Exercise Price	$ 31.77
Options Exercisable - Intrinsic Value	24,473
Options Exercisable - Weighted Average Remaining Life in Years	4 years 4 months 28 days
$40.73 - $44.07 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	463,686
Options Outstanding - Weighted Average Exercise Price	$ 43.01
Options Outstanding - Intrinsic Value	1,564
Options Outstanding - Weighted Average Remaining Life in Years	8 years 0 months 29 days
Options Exercisable - Number	160,409
Options Exercisable - Weighted Average Exercise Price	$ 43.30
Options Exercisable - Intrinsic Value	493
Options Exercisable - Weighted Average Remaining Life in Years	8 years 1 month 24 days
$49.35 - $49.91 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number	505,300
Options Outstanding - Weighted Average Exercise Price	$ 49.84
Options Outstanding - Intrinsic Value	0
Options Outstanding - Weighted Average Remaining Life in Years	9 years 3 months 29 days
Options Exercisable - Number	63,250
Options Exercisable - Weighted Average Exercise Price	$ 49.38
Options Exercisable - Intrinsic Value	$ 0
Options Exercisable - Weighted Average Remaining Life in Years	9 years 6 months 26 days