Changes in Accumulated Other Comprehensive (Loss) Income by Component (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 8.7	[1]	$ (159.5)
Recorded into AOCI			(223.7)		(31.9)
Reclassified out of AOCI			16.4		0.3
Net other comprehensive income (loss)	(262.1)	118.8	(207.3)		(31.6)
Ending balance	(198.6)	(191.1)	(198.6)		(191.1)
Derivative Contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(15.1)		(27.2)
Recorded into AOCI			(0.2)		27.3
Reclassified out of AOCI			5.7		(20.8)
Net other comprehensive income (loss)			5.5		6.5
Ending balance	(9.6)	(20.7)	(9.6)		(20.7)
Marketable Debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			1.7		6.6
Recorded into AOCI			4.1		(5.1)
Reclassified out of AOCI			(0.5)		1.0
Net other comprehensive income (loss)			3.6		(4.1)
Ending balance	5.3	2.5	5.3		2.5
Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(262.2)		(496.5)
Recorded into AOCI			3.8		2.1
Reclassified out of AOCI			11.2		22.1
Net other comprehensive income (loss)			15.0		24.2
Ending balance	(247.2)	(472.3)	(247.2)		(472.3)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			284.3		357.6
Recorded into AOCI			(231.4)		(56.2)
Reclassified out of AOCI					(2.0)
Net other comprehensive income (loss)			(231.4)		(58.2)
Ending balance	$ 52.9	$ 299.4	$ 52.9		$ 299.4

[1] The December 31, 2013 consolidated balance sheet has been derived from audited financial statements.