XML 35 R21.htm IDEA: XBRL DOCUMENT v3.4.0.3
Redeemable Capital Shares - Schedule for Redeemable Capital Shares Activity (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Apr. 30, 2016
Oct. 31, 2015
Temporary Equity Disclosure [Abstract]    
Opening Balance, Shares 3,300,000 1,650,000
Shares issued, Shares 7,700,000 11,400,000
Shares redeemed, Shares (8,850,000) (9,750,000)
Ending Balance, Shares 2,150,000 3,300,000
Opening Balance, Amount $ 357,228,041 $ 203,700,538
Shares issued, Amount 830,092,169 1,273,611,058
Shares redeemed, Amount (953,727,503) (1,089,370,082)
Adjustment to period Shares due to currency movement and other, Amount 6,902,454 (30,713,473)
Ending Balance, Amount $ 240,495,161 $ 357,228,041