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v3.21.2

Share Purchase and Redemptions - Additional Information (Detail) | 6 Months Ended
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Jun. 30, 2021
Temporary Equity Disclosure [Abstract] |
Share Purchases and Redemptions, Settlement of each creation or redemption period | 2 days

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- Definition Share purchase and redemptions settlement period creation and redemption + References No definition available. + Details
Name: | fxc_SharePurchaseAndRedemptionsSettlementPeriodCreationAndRedemption
Namespace Prefix: | fxc_
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