Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Other Comprehensive Earnings (Thousands of Dollars) [Abstract]
Other Comprehensive Income (Loss), Net gains on cash flow hedging activities, Tax	$ 1,260	$ 3,201	$ 2,971	$ 1,861
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCE, Net gains on cash flow hedging activities, Tax	286	419	419	562
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCE, Unrecognized pension and postretirement amounts, Tax	712		1,424
Cash Flow Hedge Gain to be Reclassified within Twelve Months	8,553
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year			(72,307)	(35,943)
Other Comprehensive Income (Loss), Net of Tax, Total	(9,700)	(15,413)	(5,559)	(3,700)
Total accumulated other comprehensive earnings (loss), End of Period	(77,866)	(39,643)	(77,866)	(39,643)
Pension and Postretirement Amounts [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year			(120,422)	(86,822)
Other Comprehensive Income (Loss), Net of Tax, Total			4,972	0
Total accumulated other comprehensive earnings (loss), End of Period	(115,450)	(86,822)	(115,450)	(86,822)
Gains (Losses) On Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year			(1,008)	10,081
Other Comprehensive Income (Loss), Net of Tax, Total			11,342	4,207
Total accumulated other comprehensive earnings (loss), End of Period	10,334	14,288	10,334	14,288
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year			49,123	40,798
Other Comprehensive Income (Loss), Net of Tax, Total			(21,873)	(7,907)
Total accumulated other comprehensive earnings (loss), End of Period	$ 27,250	$ 32,891	$ 27,250	$ 32,891