Condensed Consolidated Statements Of Income (Parenthetical) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2011		Sep. 25, 2011		Sep. 26, 2010
Condensed Consolidated Statements Of Income [Abstract]
Gain (loss) on disposition	$ (4)	[1]	$ 52,265	[1]	$ 38,562	[1]

[1] Gain on disposition for the nine months ended September 25, 2011 includes curtailment and settlement losses of approximately $11.5 million on the pension and other postretirement obligations that were transferred to the buyer in connection with the sale of the marine business and an adjustment related to pension and other postretirement liabilities of $3.5 million that occurred during the second quarter of 2011.