XML 25 R30.htm IDEA: XBRL DOCUMENT v2.4.0.6

Financial Instruments with Off-Balance-Sheet Risk - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Letter of credit	$ 69

X

- Details

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

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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