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Share Purchase and Redemptions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019
Temporary Equity Disclosure [Abstract]
Redeemable capital shares settlement period creation and redemption	2 days

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- Definition

Redeemable capital shares settlement period creation and redemption.

+ References

No definition available.

+ Details

Name:	fxy_RedeemableCapitalSharesSettlementPeriodCreationAndRedemption
Namespace Prefix:	fxy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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