v2.4.0.8

Debt - Schedule of Outstanding Debt (Parenthetical) (Detail) (Revolver Credit Facility [Member], USD $) In Millions, unless otherwise specified	Feb. 20, 2014	Feb. 19, 2013	Mar. 31, 2014 February 2019 [Member]	Mar. 31, 2014 February 2019 [Member] Secured Debt [Member]	Dec. 31, 2013 February 2019 [Member] Secured Debt [Member]	Mar. 31, 2014 February 2018 [Member]	Mar. 31, 2014 February 2018 [Member] Secured Debt [Member]	Dec. 31, 2013 February 2018 [Member] Secured Debt [Member]
Debt Instrument [Line Items]
Credit facility amount	$ 352	$ 352	$ 370	$ 370		$ 35	$ 35

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant