Accumulated Balances Related to Each Component of Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, Change in Derivative Instruments Designated As Cash Flow Hedges	$ (1,400,000)				$ (900,000)
Other comprehensive income (loss) before income taxes, Change in Derivative Instruments Designated As Cash Flow Hedges	2,400,000		(3,400,000)		1,400,000
Income tax (provision) benefit related to other comprehensive income (loss) items, Change in Derivative Instruments Designated As Cash Flow Hedges	(1,700,000)	[1]	2,000,000	[1]	(500,000)	[1]
Ending balance, Change in Derivative Instruments Designated As Cash Flow Hedges	(700,000)		(1,400,000)
Beginning balance, Foreign Currency Translation Adjustment	41,100,000		29,000,000		67,400,000
Other comprehensive income (loss) before income taxes, Foreign Currency Translation Adjustment	(8,500,000)		12,100,000		(38,400,000)
Income tax (provision) benefit related to other comprehensive income (loss) items, Foreign Currency Translation Adjustment		[1]		[1]		[1]
Ending balance, Foreign Currency Translation Adjustment	32,600,000		41,100,000		29,000,000
Beginning balance, Benefit Plan Adjustments	(106,300,000)		(85,200,000)		(91,200,000)
Other comprehensive income (loss) before income taxes, benefit Plan Adjustments	(12,700,000)		(30,700,000)		9,500,000
Income tax (provision) benefit related to other comprehensive income (loss) items, Benefit Plan Adjustments	5,900,000	[1]	9,600,000	[1]	(3,500,000)	[1]
Ending balance, Benefit Plan Adjustments	(113,100,000)		(106,300,000)		(85,200,000)
Beginning balance, Accumulated Other Comprehensive (Loss) Income	(66,600,000)		(56,200,000)		(24,700,000)
Other comprehensive income (loss) before income taxes	(18,800,000)		(22,000,000)		(27,500,000)
Income tax (provision) benefit related to other comprehensive income (loss) items	4,200,000	[1]	11,600,000	[1]	(4,000,000)	[1]
Ending balance, Accumulated Other Comprehensive (Loss) Income	$ (81,200,000)		$ (66,600,000)		$ (56,200,000)

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