Supplemental Financial Information - Accumulated Other Comprehensive Loss, Net of Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			$ (578,330)
Other Comprehensive Loss before Reclassifications			(10,374)
Amounts Reclassified from Accumulated Other Comprehensive Loss			10,011
Net Current Period Other Comprehensive Loss	(6,128)	(1,680)	(363)	5,245
Accumulated other comprehensive loss, Ending Balance	(578,693)		(578,693)
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			(5,307)
Net Current Period Other Comprehensive Loss			(5,307)
Accumulated other comprehensive loss, Ending Balance	34,574		34,574
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			(3,416)
Amounts Reclassified from Accumulated Other Comprehensive Loss			16
Net Current Period Other Comprehensive Loss			(3,400)
Accumulated other comprehensive loss, Ending Balance	1,084		1,084
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			(1,651)
Amounts Reclassified from Accumulated Other Comprehensive Loss			(302)
Net Current Period Other Comprehensive Loss			(1,953)
Accumulated other comprehensive loss, Ending Balance	(1,729)		(1,729)
Defined benefit pension and post-retirement plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, Beginning Balance			(622,919)
Amounts Reclassified from Accumulated Other Comprehensive Loss			10,297
Net Current Period Other Comprehensive Loss			10,297
Accumulated other comprehensive loss, Ending Balance	$ (612,622)		$ (612,622)