The effective interest rate at the end of the reporting period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Unsecured Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Feb. 28, 2014 Unsecured Floating Rate Bank Loan [Member]	Feb. 28, 2014 Euro Denominated [Member] Unsecured Floating Rate Bank Loan [Member]	Mar. 31, 2014 Euro Denominated [Member] Unsecured Floating Rate Bank Loan [Member]	Jan. 31, 2014 United States Dollar Denominated Debt [Member] Unsecured Floating Rate Bank Loan [Member]	Dec. 31, 2013 United States Dollar Denominated Debt [Member] Unsecured Floating Rate Bank Loan [Member]	Feb. 28, 2014 Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate at Period End						0.40%
Debt Instrument Maturity Month Year	October 2014	September 2014
Long-term debt			$ 139	$ 200	$ 150