Derivatives - Schedule of Gains (Losses) for Derivatives Designated as Fair Value Hedges (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments Gain Loss [Line Items]
Total (gain) loss recognized as ineffectiveness in the Condensed Consolidated Statements of Operations	$ (0.7)	$ 0.2	$ (0.4)	$ (0.2)
Interest Rate Swap | Investment and other (income) expense-net
Derivative Instruments Gain Loss [Line Items]
Total (gain) loss recognized as ineffectiveness in the Condensed Consolidated Statements of Operations	3.6	(2.2)	0.4	(3.6)
Hedged Items | Investment and other (income) expense-net
Derivative Instruments Gain Loss [Line Items]
Total (gain) loss recognized as ineffectiveness in the Condensed Consolidated Statements of Operations	$ (4.3)	$ 2.4	$ (0.8)	$ 3.4