Financing Receivables and Payables - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Financing Receivables
Financing Receivables and Payables [Line Items]
Other current assets	$ 157.5	$ 196.2
Financing Payables
Financing Receivables and Payables [Line Items]
Other liabilities	$ 136.5	$ 168.8

Financing receivables that are current.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524

Name:	us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant