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Employee Benefit Plans - accumulated benefit obligations in excess of fair value of plan assets (Details) (USD $) In Thousands, unless otherwise specified	Nov. 25, 2012	Nov. 27, 2011
Accumulated benefit obligations in excess of plan assets [Abstract]
Aggregate accumulated benefit obligation	$ 1,335,827	$ 1,133,801
Aggregate fair value of plan assets	859,373	713,818
Projected benefit obigations in excess of plan assets [Abstract]
Aggregate projected benefit obligation	1,388,650	1,203,677
Aggregate fair value of plan assets	$ 894,362	$ 771,914

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

- Definition

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details