Cumulative Amount of Unrecognized Hedge Losses Recorded in Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Hedge Underlying Gain Loss [Line Items]
Cumulative amount of unrecognized hedge losses recorded in AOCI	$ 1.5	$ (2.9)
Net Investment Hedging | Foreign exchange forward
Hedge Underlying Gain Loss [Line Items]
Cumulative amount of unrecognized hedge losses recorded in AOCI	1.5	(2.2)
Cash Flow Hedging | Interest rate swaps
Hedge Underlying Gain Loss [Line Items]
Cumulative amount of unrecognized hedge losses recorded in AOCI	$ 0	$ (0.7)