Accumulated Other Comprehensive Loss (Changes In Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 1,839,654
Total other comprehensive income (loss), net of tax	$ 13,177	$ (365)	25,044	$ (7,583)
Balance, end of period	2,021,007	3,023,627	2,021,007	3,023,627
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(603,338)	(522,161)	(615,205)	(514,943)
Other comprehensive income (loss) before reclassifications	10,601	3,740	12,385	6,191
Income tax	(2,883)	(307)	(25)	(9,354)
Net other comprehensive income (loss) before reclassifications	7,718	3,433	12,360	(3,163)
Total reclassifications before tax	8,669	(6,031)	20,145	(7,018)
Reclassifications from AOCI, Income tax expense (benefit)	(3,210)	2,233	(7,461)	2,598
Net reclassifications	5,459	(3,798)	12,684	(4,420)
Total other comprehensive income (loss), net of tax	13,177	(365)	25,044	(7,583)
Balance, end of period	(590,161)	(522,526)	(590,161)	(522,526)
AOCI Attributable to Parent [Member] | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(3,551)	(20,131)	(4,407)	(35,407)
AOCI Attributable to Parent [Member] | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	104	125	319	439
AOCI Attributable to Parent [Member] | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	90		181
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(46,151)	(30,503)	(58,844)	(3,482)
Other comprehensive income (loss) before reclassifications	2,516	5,040	17,087	(24,951)
Income tax	112	(789)	(1,766)	2,181
Net other comprehensive income (loss) before reclassifications	2,628	4,251	15,321	(22,770)
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 (loss), net of tax	2,628	4,251	15,321	(22,770)
Balance, end of period	(43,523)	(26,252)	(43,523)	(26,252)
Marketable securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(1,139)	(767)	(1,094)	(700)
Other comprehensive income (loss) before reclassifications	(51)	(204)	(122)	(310)
Income tax	19	76	45	115
Net other comprehensive income (loss) before reclassifications	(32)	(128)	(77)	(195)
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 (loss), net of tax	(32)	(128)	(77)	(195)
Balance, end of period	(1,171)	(895)	(1,171)	(895)
Derivative financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,466)	30,114	5,886	19,042
Other comprehensive income (loss) before reclassifications	8,136	(1,096)	(4,580)	31,452
Income tax	(3,014)	406	1,696	(11,650)
Net other comprehensive income (loss) before reclassifications	5,122	(690)	(2,884)	19,802
Total reclassifications before tax	(3,357)	(20,006)	(3,907)	(34,968)
Reclassifications from AOCI, Income tax expense (benefit)	1,244	7,410	1,448	12,952
Net reclassifications	(2,113)	(12,596)	(2,459)	(22,016)
Total other comprehensive income (loss), net of tax	3,009	(13,286)	(5,343)	(2,214)
Balance, end of period	543	16,828	543	16,828
Derivative financial instruments | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(3,551)	(20,131)	(4,407)	(35,407)
Derivative financial instruments | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	104	125	319	439
Derivative financial instruments | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	90		181
Pension and postretirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(553,582)	(521,005)	(561,153)	(529,803)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Income tax	0	0	0	0
Net other comprehensive income (loss) before reclassifications	0	0	0	0
Total reclassifications before tax	12,026	13,975	24,052	27,950
Reclassifications from AOCI, Income tax expense (benefit)	(4,454)	(5,177)	(8,909)	(10,354)
Net reclassifications	7,572	8,798	15,143	17,596
Total other comprehensive income (loss), net of tax	7,572	8,798	15,143	17,596
Balance, end of period	(546,010)	(512,207)	(546,010)	(512,207)
Pension and postretirement benefit plans - Prior service credits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(446)	(695)	(892)	(1,390)
Pension and postretirement benefit plans - Actuarial losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	$ 12,472	$ 14,670	$ 24,944	$ 29,340