Accumulated Other Comprehensive Loss (Changes In Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 24, 2017	Sep. 30, 2018	Sep. 24, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 1,844,277
Total other comprehensive income, net of tax	$ 10,312	$ 14,863	113,597	$ 36,299
Balance, end of period	2,152,972	1,856,820	2,152,972	1,856,820
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(396,764)	(543,945)	(500,049)	(565,381)
Other comprehensive (loss) income before reclassifications	3,014	(8,938)	105,709	(6,515)
Income tax (benefit) expense	(1,355)	11,479	(30,073)	19,978
Net other comprehensive (loss) income before reclassifications	1,659	2,541	75,636	13,463
Total reclassifications before tax	11,296	19,569	49,588	36,268
Reclassifications from AOCI, Income tax expense (benefit)	(2,643)	(7,247)	(11,627)	(13,432)
Net reclassifications	8,653	12,322	37,961	22,836
Total other comprehensive income, net of tax	10,312	14,863	113,597	36,299
Balance, end of period	(386,452)	(529,082)	(386,452)	(529,082)
AOCI Attributable to Parent | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(5,695)	7,901	58	1,428
AOCI Attributable to Parent | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax		16	85	(49)
AOCI Attributable to Parent | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	123	126	374	315
AOCI Attributable to Parent | Interest Rate Swap
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	661		950
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(41,419)	(42,938)	(21,852)	(68,132)
Other comprehensive (loss) income before reclassifications	(2,037)	26,754	(21,604)	51,834
Income tax (benefit) expense	(175)	(1,741)	(175)	(1,627)
Net other comprehensive (loss) income before reclassifications	(2,212)	25,013	(21,779)	50,207
Total reclassifications before tax	0	0	0	0
Reclassifications from AOCI, Income tax expense (benefit)	0	0	0	0
Net reclassifications	0	0	0	0
Total other comprehensive income, net of tax	(2,212)	25,013	(21,779)	50,207
Balance, end of period	(43,631)	(17,925)	(43,631)	(17,925)
Marketable securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	0	0	0	(1,194)
Other comprehensive (loss) income before reclassifications	0	0	0	1,896
Income tax (benefit) expense	0	0	0	(702)
Net other comprehensive (loss) income before reclassifications	0	0	0	1,194
Total reclassifications before tax	0	0	0	0
Reclassifications from AOCI, Income tax expense (benefit)	0	0	0	0
Net reclassifications	0	0	0	0
Total other comprehensive income, net of tax	0	0	0	1,194
Balance, end of period	0	0	0	0
Derivative financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	7,431	(6,940)	(17,254)	12,524
Other comprehensive (loss) income before reclassifications	5,051	(35,692)	30,939	(60,245)
Income tax (benefit) expense	(1,180)	13,220	(7,269)	22,307
Net other comprehensive (loss) income before reclassifications	3,871	(22,472)	23,670	(37,938)
Total reclassifications before tax	(4,911)	8,043	1,467	1,694
Reclassifications from AOCI, Income tax expense (benefit)	1,163	(2,978)	(329)	(627)
Net reclassifications	(3,748)	5,065	1,138	1,067
Total other comprehensive income, net of tax	123	(17,407)	24,808	(36,871)
Balance, end of period	7,554	(24,347)	7,554	(24,347)
Derivative financial instruments | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(5,695)	7,901	58	1,428
Derivative financial instruments | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax		16	85	(49)
Derivative financial instruments | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	123	126	374	315
Derivative financial instruments | Interest Rate Swap
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	661		950
Pension and postretirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(362,776)	(494,067)	(460,943)	(508,579)
Other comprehensive (loss) income before reclassifications	0	0	96,374	0
Income tax (benefit) expense	0	0	(22,629)	0
Net other comprehensive (loss) income before reclassifications	0	0	73,745	0
Total reclassifications before tax	16,207	11,526	48,121	34,574
Reclassifications from AOCI, Income tax expense (benefit)	(3,806)	(4,269)	(11,298)	(12,805)
Net reclassifications	12,401	7,257	36,823	21,769
Total other comprehensive income, net of tax	12,401	7,257	110,568	21,769
Balance, end of period	(350,375)	(486,810)	(350,375)	(486,810)
Pension and postretirement benefit plans - Prior service credits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(565)	(287)	(1,696)	(865)
Pension and postretirement benefit plans - Actuarial losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	$ 16,772	$ 11,813	$ 49,817	$ 35,439