Pension and Other Postretirement Plans (Details 3)	12 Months Ended
	Dec. 03, 2011	Nov. 27, 2010
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	70.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Debt Securities	25.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Real Estate	5.00%
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	72.10%	71.50%
Debt Securities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	24.10%	24.90%
Real estate funds [Member]
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations	3.80%	3.60%