Accumulated Other Comprehensive Loss (Changes In Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 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	$ 9,383	$ (16,431)	34,427	$ (24,014)
Balance, end of period	1,992,368	2,559,673	1,992,368	2,559,673
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(590,161)	(522,526)	(615,205)	(514,943)
Other comprehensive income (loss) before reclassifications	2,661	(21,248)	15,046	(15,082)
Income tax (benefit) expense	618	3,977	593	(5,367)
Net other comprehensive income (loss) before reclassifications	3,279	(17,271)	15,639	(20,449)
Total reclassifications before tax	9,696	1,333	29,841	(5,660)
Reclassifications from AOCI, Income tax expense (benefit)	(3,592)	(493)	(11,053)	2,095
Net reclassifications	6,104	840	18,788	(3,565)
Total other comprehensive income (loss), net of tax	9,383	(16,431)	34,427	(24,014)
Balance, end of period	(580,778)	(538,957)	(580,778)	(538,957)
AOCI Attributable to Parent [Member] | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(2,399)	(12,771)	(6,806)	(48,175)
AOCI Attributable to Parent [Member] | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(21)	68	298	530
AOCI Attributable to Parent [Member] | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	90	60	271	60
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(43,523)	(26,252)	(58,844)	(3,482)
Other comprehensive income (loss) before reclassifications	3,574	(17,003)	20,661	(41,954)
Income tax (benefit) expense	279	2,405	(1,487)	4,586
Net other comprehensive income (loss) before reclassifications	3,853	(14,598)	19,174	(37,368)
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	3,853	(14,598)	19,174	(37,368)
Balance, end of period	(39,670)	(40,850)	(39,670)	(40,850)
Marketable securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(1,171)	(895)	(1,094)	(700)
Other comprehensive income (loss) before reclassifications	(18)	(157)	(140)	(467)
Income tax (benefit) expense	7	58	52	173
Net other comprehensive income (loss) before reclassifications	(11)	(99)	(88)	(294)
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	(11)	(99)	(88)	(294)
Balance, end of period	(1,182)	(994)	(1,182)	(994)
Derivative financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	543	16,828	5,886	19,042
Other comprehensive income (loss) before reclassifications	(895)	(4,088)	(5,475)	27,339
Income tax (benefit) expense	332	1,514	2,028	(10,126)
Net other comprehensive income (loss) before reclassifications	(563)	(2,574)	(3,447)	17,213
Total reclassifications before tax	(2,330)	(12,643)	(6,237)	(47,585)
Reclassifications from AOCI, Income tax expense (benefit)	862	4,684	2,310	17,625
Net reclassifications	(1,468)	(7,959)	(3,927)	(29,960)
Total other comprehensive income (loss), net of tax	(2,031)	(10,533)	(7,374)	(12,747)
Balance, end of period	(1,488)	6,295	(1,488)	6,295
Derivative financial instruments | Foreign Currency Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(2,399)	(12,771)	(6,806)	(48,175)
Derivative financial instruments | Commodity Contract
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(21)	68	298	530
Derivative financial instruments | Treasury Rate Locks
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	90	60	271	60
Pension and postretirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(546,010)	(512,207)	(561,153)	(529,803)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Net other comprehensive income (loss) before reclassifications	0	0	0	0
Total reclassifications before tax	12,026	13,976	36,078	41,925
Reclassifications from AOCI, Income tax expense (benefit)	(4,454)	(5,177)	(13,363)	(15,530)
Net reclassifications	7,572	8,799	22,715	26,395
Total other comprehensive income (loss), net of tax	7,572	8,799	22,715	26,395
Balance, end of period	(538,438)	(503,408)	(538,438)	(503,408)
Pension and postretirement benefit plans - Prior service credits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(446)	(695)	(1,338)	(2,085)
Pension and postretirement benefit plans - Actuarial losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	$ 12,472	$ 14,671	$ 37,416	$ 44,010