Accumulated Other Comprehensive Income (Loss) - Details of Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (loss), Net of Taxes, beginning balance				$ (820.0)	[1]	$ (613.8)
Other comprehensive income (loss) before reclassifications				(19.0)		(178.0)
Less: amounts reclassified from accumulated other comprehensive income (loss)				(19.9)		(21.4)
Other comprehensive loss, net of taxes		$ (15.4)	$ (129.1)	(38.9)		(199.4)
Accumulated Other Comprehensive Income (loss), Net of Taxes ending balance	[2]	(858.9)	(813.2)	(858.9)		(813.2)
Unrecognized Pension Items
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (loss), Net of Taxes, beginning balance				(266.0)		(250.1)
Other comprehensive income (loss) before reclassifications				(3.6)		3.4
Less: amounts reclassified from accumulated other comprehensive income (loss)				9.2		6.0
Other comprehensive loss, net of taxes				5.6		9.4
Accumulated Other Comprehensive Income (loss), Net of Taxes ending balance	[2]	(260.4)	(240.7)	(260.4)		(240.7)
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (loss), Net of Taxes, beginning balance				(564.0)		(369.9)
Other comprehensive income (loss) before reclassifications				19.4		(197.1)
Less: amounts reclassified from accumulated other comprehensive income (loss)				(46.0)
Other comprehensive loss, net of taxes				(26.6)		(197.1)
Accumulated Other Comprehensive Income (loss), Net of Taxes ending balance	[2]	(590.6)	(567.0)	(590.6)		(567.0)
Unrecognized Gains (Losses) on Derivative Instruments | Net Investment Hedge [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (loss), Net of Taxes, beginning balance				1.7
Other comprehensive income (loss) before reclassifications				(15.4)		(14.4)
Other comprehensive loss, net of taxes				(15.4)		(14.4)
Accumulated Other Comprehensive Income (loss), Net of Taxes ending balance	[2]	(13.7)	(14.4)	(13.7)		(14.4)
Unrecognized Gains (Losses) on Derivative Instruments | Cash Flow Hedge [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (loss), Net of Taxes, beginning balance				8.3		6.2
Other comprehensive income (loss) before reclassifications				(19.4)		30.1
Less: amounts reclassified from accumulated other comprehensive income (loss)				16.9		(27.4)
Other comprehensive loss, net of taxes				(2.5)		2.7
Accumulated Other Comprehensive Income (loss), Net of Taxes ending balance	[2]	$ 5.8	$ 8.9	$ 5.8		$ 8.9

[1] As of January 1, 2016, we have adopted ASU 2015-03 and ASU 2015-15 with retrospective application. This resulted in a reclassification from other non-current assets to long-term debt, less current portion for debt issuance costs as of December 31, 2015. Refer to Note 2, “Recently Issued Accounting Standards” of the notes to the condensed consolidated financial statements for further details.

[2] The ending balance in AOCI includes gains and losses on intra-entity foreign currency transactions. The intra-entity currency translation adjustment was $(31.4) million as of September 30, 2016 and $8.7 million as of September 30, 2015.