Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Other comprehensive earnings (loss) [Abstract]
Tax benefit (expense) on cash flow hedging activities	$ (11,190)	$ 8,259	$ (511)
Tax benefit (expense) on unrealized holding gains	364	(1,077)	0
Tax benefit (expense) on unrecognized pension and postretirement amounts	(928)	23,869	(25,193)
Reclassifications to earnings, tax effect: Tax (benefit) expense on cash flow hedging activities	5,435	(2,488)	946
Reclassifications to earnings, tax effect: Tax (benefit) expense on unrecognized pension and postretirement amounts	(1,861)	(1,327)	(4,275)
(Gain) Loss On Cash Flow Hedge Ineffectiveness Net Of Tax	(1,111)	(58)	(168)
Foreign Currency and Interest Rate Cash Flow Hedge Gain (Loss) To Be Reclassified During Next12 Months Net Of Tax	63,181
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(95,454)	(34,135)	(72,307)
Current period other comprehensive earnings (loss)	(3,289)	(67,676)	32,902
Reclassifications from AOCE to earnings	(47,258)	6,357	5,270
Total accumulated other comprehensive earnings (loss), End of Period	(146,001)	(95,454)	(34,135)
Pension and Postretirement Amounts [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(113,092)	(64,841)	(120,422)
Current period other comprehensive earnings (loss)	6,892	(51,206)	47,081
Reclassifications from AOCE to earnings	3,269	2,955	8,500
Total accumulated other comprehensive earnings (loss), End of Period	(102,931)	(113,092)	(64,841)
Gains (Losses) On Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	43,689	(7,313)	(1,008)
Current period other comprehensive earnings (loss)	86,155	47,600	(3,075)
Reclassifications from AOCE to earnings	(50,527)	3,402	(3,230)
Total accumulated other comprehensive earnings (loss), End of Period	79,317	43,689	(7,313)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(27,951)	38,019	49,123
Current period other comprehensive earnings (loss)	(95,694)	(65,970)	(11,104)
Reclassifications from AOCE to earnings	0	0	0
Total accumulated other comprehensive earnings (loss), End of Period	(123,645)	(27,951)	38,019
Unrealized Holding Gains on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	1,900	0	0
Current period other comprehensive earnings (loss)	(642)	1,900	0
Reclassifications from AOCE to earnings	0	0	0
Total accumulated other comprehensive earnings (loss), End of Period	1,258	$ 1,900	$ 0
Interest Rate Contract [Member] | Gains (Losses) On Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), End of Period	19,363
Foreign Exchange Forward [Member] | Gains (Losses) On Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), End of Period	$ 98,680