Accumulated Other Comprehensive (Loss) Income - Changes in Components of Other Comprehensive Income, Net of Tax (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income, Beginning Balance	$ 38.1
Accumulated Other Comprehensive Income, Ending Balance	(329.0)
Foreign Currency Translation [Member]
Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income, Beginning Balance	111.8
OCI before reclassifications	(305.2)
Accumulated Other Comprehensive Income, Ending Balance	(193.4)
Unrealized Gains on Securities [Member]
Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income, Beginning Balance	(0.4)
OCI before reclassifications	(0.2)
Accumulated Other Comprehensive Income, Ending Balance	(0.6)
Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income, Beginning Balance	(143.4)
OCI before reclassifications	(30.6)
Reclassifications	9.2
Accumulated Other Comprehensive Income, Ending Balance	(164.8)
Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income, Beginning Balance	70.1
OCI before reclassifications	52.7
Reclassifications	(93.0)
Accumulated Other Comprehensive Income, Ending Balance	$ 29.8