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Guarantees - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013 Category
Guarantees [Abstract]
Number of categories of letters of credit	3

X

- Definition

Number of categories of guarantees.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
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