Supplemental Financial Information - Accumulated Other Comprehensive Loss, Net of Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			$ (578,330)
Other Comprehensive Loss before Reclassifications			(11,846)
Amounts Reclassified from Accumulated Other Comprehensive Loss			16,403
Net Current Period Other Comprehensive Income	4,920	9,804	4,557	15,049
Accumulated other comprehensive loss, Ending Balance	(573,773)		(573,773)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			39,881
Other Comprehensive Loss before Reclassifications			(6,667)
Amounts Reclassified from Accumulated Other Comprehensive Loss
Net Current Period Other Comprehensive Income			(6,667)
Accumulated other comprehensive loss, Ending Balance	33,214		33,214
Net unrealized gain on investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			4,484
Other Comprehensive Loss before Reclassifications			(2,449)
Amounts Reclassified from Accumulated Other Comprehensive Loss			138
Net Current Period Other Comprehensive Income			(2,311)
Accumulated other comprehensive loss, Ending Balance	2,173		2,173
Net unrealized gain/(loss) on derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			224
Other Comprehensive Loss before Reclassifications			(2,730)
Amounts Reclassified from Accumulated Other Comprehensive Loss			820
Net Current Period Other Comprehensive Income			(1,910)
Accumulated other comprehensive loss, Ending Balance	(1,686)		(1,686)
Defined benefit pension and post-retirement plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			(622,919)
Other Comprehensive Loss before Reclassifications
Amounts Reclassified from Accumulated Other Comprehensive Loss			15,445
Net Current Period Other Comprehensive Income			15,445
Accumulated other comprehensive loss, Ending Balance	$ (607,474)		$ (607,474)