Pension, Postretirement and Postemployment Benefits (Tables)

6 Months Ended

Jun. 26, 2011

Pension, Postretirement and Postemployment Benefits (Thousands of Dollars) [Abstract]

Components of net periodic cost

	Quarter Ended
	--------------------
	Pension		Postretirement
	------------------		------------------
	June 26, 2011	June 27, 2010	June 26, 2011	June 27, 2010
	-------	-------	-------	-------
Service cost	$  1,090	1,045	171	152
Interest cost	5,231	5,171	440	450
Expected return on assets	(6,258)	(6,081)	-	-
Net amortization and deferrals	1,295	1,093	18	-
	--------	--------	--------	--------
Net periodic benefit cost	$  1,358	1,228	629	602
	=====	=====	=====	=====

	Six Months Ended
	------------------
	Pension		Postretirement
	------------------		------------------
	June 26, 2011	June 27, 2010	June 26, 2011	June 27, 2010
	-------	-------	-------	-------
Service cost	$  2,169	2,127	342	305
Interest cost	10,454	10,407	880	900
Expected return on assets	(12,507)	(12,225)	-	-
Net amortization and deferrals	2,590	2,188	36	-
	--------	--------	--------	--------
Net periodic benefit cost	$  2,706	2,497	1,258	1,205
	=====	=====	=====	=====