Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Consolidated Statements of Comprehensive Earnings [Abstract]
Net earnings	$ 335,999	$ 385,367	$ 397,752
Other comprehensive earnings (loss):
Foreign currency translation adjustments	8,325	(21,844)	(32,457)
Net (losses) gains on cash flow hedging activities, net of tax	(3,704)	(8,689)	10,444
Changes in unrecognized pension and postretirement amounts, net of tax	(38,335)	(20,237)	(1,812)
Reclassifications to earnings, net of tax:
Net (gains) losses on cash flow hedging activities	(7,385)	3,338	(15,422)
Amortization of unrecognized pension and postretirement amounts	4,735	3,340	(11,235)
Other comprehensive loss	(36,364)	(44,092)	(50,482)
Total comprehensive earnings	$ 299,635	$ 341,275	$ 347,270