Pension and Other Postretirement Plans (Details 3)	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	60.00%
Defined Benefit Plan, Actual Plan Asset Allocations	60.60%	72.10%
Debt Securities [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	40.00%
Defined Benefit Plan, Actual Plan Asset Allocations	38.90%	24.10%
Real estate funds [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	0.00%	3.40%
Cash and equivalents [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	0.50%	0.40%