Pension and Other Postretirement Plans (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 03, 2011	Nov. 27, 2010	Nov. 28, 2009	Jan. 01, 2007
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Defined Contribution Plan, Cost Recognized	$ 3,933	$ 3,597	$ 3,658
Pension Plans, Defined Benefit [Member]
Components of net periodic benefit cost (income):
Service cost	1,968	2,119	1,799
Interest cost	8,133	8,108	9,275
Expected return on plan assets	(7,674)	(7,123)	(6,938)
Settlement cost	1,368	0	0
Amortization of unrecognized:
Prior service cost	(395)	(394)	127
Net actuarial loss (gain)	5,110	5,006	3,559
Net periodic benefit cost (income)	8,510	7,716	7,822
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.50%	7.75%	8.00%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Net prior service cost (credit)	(30)	(425)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	7,650
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	7,162
2013	28,088
2014	8,063
2015	8,424
2016	8,754
2017-2021	51,142
Pension Plans, Defined Benefit [Member] | Prior Service Cost (Credit) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	12
Pension Plans, Defined Benefit [Member] | Actuarial Loss (Gain) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	7,638
Pension Plans, Defined Benefit [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.25%	5.50%	8.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.00%	4.00%	4.00%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan Next Fiscal Year Assumptions For Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets	7.50%
Defined Benefit Plan, Next Fiscal Year Assumptions for Calculating Net Periodic Benefit Cost, Discount Rate	4.50%
Defined Benefit Plan Next Fiscal Year Assumptions For Calculating Net Periodic Benefit Cost Rate Of Compensation Increase	4.00%
Defined Benefit Plan Effect on Next Fiscal Year Net Periodic Benefit Cost From Changes in Assumptions	(608)
Pension Plans, Defined Benefit [Member] | Qualified Pension Plans [Member] | Net Periodic Benefit Expense (Income) [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Measurement Date	11/30/2010	11/30/2009	11/1/2008
Pension Plans, Defined Benefit [Member] | U.S. Combined Nonqualified Plans [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.75%	2.25%	7.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.00%	4.00%	0.00%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Next Fiscal Year Assumptions for Calculating Net Periodic Benefit Cost, Discount Rate	2.75%
Defined Benefit Plan Next Fiscal Year Assumptions For Calculating Net Periodic Benefit Cost Rate Of Compensation Increase	4.00%
Defined Benefit Plan Effect on Next Fiscal Year Net Periodic Benefit Cost From Changes in Assumptions	594
Pension Plans, Defined Benefit [Member] | U.S. Combined Nonqualified Plans [Member] | Net Periodic Benefit Expense (Income) [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Measurement Date	11/30/2011	11/30/2010	11/1/2008
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit cost (income):
Service cost	0	0
Interest cost	23	32	61
Amortization of unrecognized:
Prior service cost	(122)	(123)	(123)
Net actuarial loss (gain)	(130)	(129)	(184)
Net periodic benefit cost (income)	(229)	(220)	(246)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.75%	4.25%	8.25%
Defined Benefit Plan Weighted Average Next Fiscal Year Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Next Fiscal Year Assumptions for Calculating Net Periodic Benefit Cost, Discount Rate	3.50%
Net prior service cost (credit)	(840)	(962)		1,708
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	(244)
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	99
2013	78
2014	72
2015	64
2016	52
2017-2021	170
Other Postretirement Benefit Plans, Defined Benefit [Member] | Prior Service Cost (Credit) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	(123)
Other Postretirement Benefit Plans, Defined Benefit [Member] | Actuarial Loss (Gain) [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	$ (121)
Other Postretirement Benefit Plans, Defined Benefit [Member] | Net Periodic Benefit Expense (Income) [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Measurement Date	11/30/2010	11/30/2009	11/1/2008