Accumulated Balances Related to Each Component of Other Comprehensive Income (Loss) (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, Change in Derivative Instruments Designated As Cash Flow Hedges	$ (1,400,000)
Other comprehensive income (loss) before income taxes, Change in Derivative Instruments Designated As Cash Flow Hedges	4,100,000		(6,700,000)
Income tax (provision) benefit related to other comprehensive income (loss) items, Change in Derivative Instruments Designated As Cash Flow Hedges	(2,000,000)	[1]	2,600,000	[1]
Ending balance, Change in Derivative Instruments Designated As Cash Flow Hedges	700,000		(4,100,000)
Beginning balance, Foreign Currency Translation Adjustment	41,100,000		29,000,000
Other comprehensive income (loss) before income taxes, Foreign Currency Translation Adjustment	(24,300,000)		41,900,000
Income tax (provision) benefit related to other comprehensive income (loss) items, Foreign Currency Translation Adjustment		[1]		[1]
Ending balance, Foreign Currency Translation Adjustment	16,800,000		70,900,000
Beginning balance, Benefit Plan Adjustments	(106,300,000)		(85,200,000)
Other comprehensive income (loss) before income taxes, benefit Plan Adjustments	8,000,000		6,000,000
Income tax (provision) benefit related to other comprehensive income (loss) items, Benefit Plan Adjustments	(2,800,000)	[1]	(2,100,000)	[1]
Ending balance, Benefit Plan Adjustments	(101,100,000)		(81,300,000)
Beginning balance, Accumulated Other Comprehensive (Loss) Income	(66,600,000)		(56,200,000)
Other comprehensive income (loss) before income taxes	(12,200,000)		41,200,000
Income tax (provision) benefit related to other comprehensive income (loss) items	(4,800,000)	[1]	500,000	[1]
Ending balance, Accumulated Other Comprehensive (Loss) Income	$ (83,600,000)		$ (14,500,000)

[1] Income taxes are not provided for foreign currency translation adjustments.