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Recently Issued Accounting Standards - Additional Information (Detail) $ in Millions	Sep. 30, 2015 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Debt issuance costs	$ 3

X

- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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