Accumulated Other Comprehensive Loss (Changes In Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jun. 25, 2017	Jul. 01, 2018	Jun. 25, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 1,844,277
Total other comprehensive income, net of tax	$ 9,840	$ 7,685	103,285	$ 21,436
Balance, end of period	2,161,526	2,046,167	2,161,526	2,046,167
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(406,604)	(551,630)	(500,049)	(565,381)
Other comprehensive (loss) income before reclassifications	5,312	(1,291)	102,695	2,423
Income tax (benefit) expense	(7,476)	4,160	(28,718)	8,499
Net other comprehensive (loss) income before reclassifications	(2,164)	2,869	73,977	10,922
Total reclassifications before tax	15,677	7,649	38,292	16,699
Reclassifications from AOCI, Income tax expense (benefit)	(3,673)	(2,833)	(8,984)	(6,185)
Net reclassifications	12,004	4,816	29,308	10,514
Total other comprehensive income, net of tax	9,840	7,685	103,285	21,436
Balance, end of period	(396,764)	(543,945)	(396,764)	(543,945)
AOCI Attributable to Parent [Member] | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(956)	(3,957)	5,753	(6,473)
AOCI Attributable to Parent [Member] | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	12	(17)	85	(65)
AOCI Attributable to Parent [Member] | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	125	99	251	189
AOCI Attributable to Parent [Member] | Interest Rate Swap [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	289		289
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(14,937)	(52,575)	(21,852)	(68,132)
Other comprehensive (loss) income before reclassifications	(26,482)	9,447	(19,567)	25,080
Income tax (benefit) expense	0	190	0	114
Net other comprehensive (loss) income before reclassifications	(26,482)	9,637	(19,567)	25,194
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	(26,482)	9,637	(19,567)	25,194
Balance, end of period	(41,419)	(42,938)	(41,419)	(42,938)
Marketable securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	0	(1,204)	0	(1,194)
Other comprehensive (loss) income before reclassifications	0	1,912	0	1,896
Income tax (benefit) expense	0	(708)	0	(702)
Net other comprehensive (loss) income before reclassifications	0	1,204	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	1,204	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	(16,489)	3,472	(17,254)	12,524
Other comprehensive (loss) income before reclassifications	31,794	(12,650)	25,888	(24,553)
Income tax (benefit) expense	(7,476)	4,678	(6,089)	9,087
Net other comprehensive (loss) income before reclassifications	24,318	(7,972)	19,799	(15,466)
Total reclassifications before tax	(530)	(3,875)	6,378	(6,349)
Reclassifications from AOCI, Income tax expense (benefit)	132	1,435	(1,492)	2,351
Net reclassifications	(398)	(2,440)	4,886	(3,998)
Total other comprehensive income, net of tax	23,920	(10,412)	24,685	(19,464)
Balance, end of period	7,431	(6,940)	7,431	(6,940)
Derivative financial instruments | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(956)	(3,957)	5,753	(6,473)
Derivative financial instruments | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	12	(17)	85	(65)
Derivative financial instruments | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	125	99	251	189
Derivative financial instruments | Interest Rate Swap [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	289		289
Pension and postretirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(375,178)	(501,323)	(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	11,524	31,914	23,048
Reclassifications from AOCI, Income tax expense (benefit)	(3,805)	(4,268)	(7,492)	(8,536)
Net reclassifications	12,402	7,256	24,422	14,512
Total other comprehensive income, net of tax	12,402	7,256	98,167	14,512
Balance, end of period	(362,776)	(494,067)	(362,776)	(494,067)
Pension and postretirement benefit plans - Prior service credits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(565)	(289)	(1,131)	(578)
Pension and postretirement benefit plans - Actuarial losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	$ 16,772	$ 11,813	$ 33,045	$ 23,626