Derivative Financial Instruments - Summary of Effect of Derivative Financial Instruments on Consolidated Statement of Operations (Parenthetical) (Detail) $ in Millions	6 Months Ended
Jun. 30, 2015 USD ($)
Net Investment Hedges [Member] \| Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net cash settlements on our foreign currency forward contracts	$ 2.8

The cash inflow provided by derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3505-108585

Name:	us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration