Segment Reporting and Geographic Information - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) segment	Dec. 31, 2014 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	2
Number of reportable segments | segment	2
Segment Reporting, Asset Reconciling Item [Line Items]
Assets | $	$ 12,643.2	$ 2,749.4
Non-US
Segment Reporting, Asset Reconciling Item [Line Items]
Assets | $	$ 1,237.1