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Hedging Financial Instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Description of forward exchange contracts maturity	Maturities of 12 months or less.
Interest rate futures contracts [member]
Disclosure of detailed information about financial instruments [line items]
Hedge ratio adjustment percentage	100.00%
Forward exchange contracts and foreign currency deposits [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Hedge ratio adjustment percentage	100.00%

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

Description of forward exchange contracts maturity

+ References

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- Definition

Hedge ratio adjustment percentage.

+ References

No definition available.

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- Details

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- Details

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- Details

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