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Redeemable Capital Shares - Schedule for Redeemable Capital Shares Activity (Detail) (USD $)
 6 Months Ended 12 Months Ended
Apr. 30, 2015
Oct. 31, 2014
Changes In Redeemable Capital Shares [Abstract]    
Opening balance, Shares 1,650,000us-gaap_CommonStockSharesOutstanding 1,500,000us-gaap_CommonStockSharesOutstanding
Shares issued, Shares 8,050,000us-gaap_StockIssuedDuringPeriodSharesIssuedForCash 5,900,000us-gaap_StockIssuedDuringPeriodSharesIssuedForCash
Shares redeemed, Shares (6,400,000)us-gaap_StockRedeemedOrCalledDuringPeriodShares (5,750,000)us-gaap_StockRedeemedOrCalledDuringPeriodShares
Adjustment to period Shares due to currency movement and other, Shares 0fxe_AdjustmentToPeriodSharesCurrencyMovementAndOtherAggregateShares 0fxe_AdjustmentToPeriodSharesCurrencyMovementAndOtherAggregateShares
Ending balance, Shares 3,300,000us-gaap_CommonStockSharesOutstanding [1] 1,650,000us-gaap_CommonStockSharesOutstanding
Opening balance, Amount $ 203,700,538us-gaap_CommonStockValue $ 201,725,396us-gaap_CommonStockValue
Shares issued, Amount 916,253,348us-gaap_StockIssuedDuringPeriodValueIssuedForCash 785,537,645us-gaap_StockIssuedDuringPeriodValueIssuedForCash
Shares redeemed, Amount (728,578,464)us-gaap_StockRedeemedOrCalledDuringPeriodValue (765,542,887)us-gaap_StockRedeemedOrCalledDuringPeriodValue
Adjustment to period Shares due to currency movement and other, Amount (27,904,183)fxe_AdjustmentToPeriodSharesCurrencyMovementAndOtherAggregateValue (18,019,616)fxe_AdjustmentToPeriodSharesCurrencyMovementAndOtherAggregateValue
Ending balance, Amount $ 363,471,239us-gaap_CommonStockValue [1] $ 203,700,538us-gaap_CommonStockValue
[1] (Unaudited)