Other Comprehensive Earnings (Loss), Changes in the components of accumulated other comprehensive loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Mar. 27, 2016
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	$ (194,570)	$ (146,001)
Other Comprehensive Earnings (Loss), Net of Tax, Total	(2,601)	(18,352)
Total accumulated other comprehensive earnings (loss), End of Period	(197,171)	(164,353)
Pension and Postretirement Amounts [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(118,401)	(102,931)
Other Comprehensive Earnings (Loss), Net of Tax, Total	1,448	1,175
Total accumulated other comprehensive earnings (loss), End of Period	(116,953)	(101,756)
Gains (Losses) On Derivative Instruments [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	51,085	79,317
Other Comprehensive Earnings (Loss), Net of Tax, Total	(28,691)	(33,347)
Total accumulated other comprehensive earnings (loss), End of Period	22,394	45,970
Gains (Losses) On Derivative Instruments [Member] | Interest Rate Contract [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), End of Period	(17,907)
Gains (Losses) On Derivative Instruments [Member] | Foreign Exchange Forward [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), End of Period	40,301
Unrealized Holding Gains on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	1,424	1,258
Other Comprehensive Earnings (Loss), Net of Tax, Total	(31)	1,680
Total accumulated other comprehensive earnings (loss), End of Period	1,393	2,938
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(128,678)	(123,645)
Other Comprehensive Earnings (Loss), Net of Tax, Total	24,673	12,140
Total accumulated other comprehensive earnings (loss), End of Period	$ (104,005)	$ (111,505)