XML 38 R21.htm IDEA: XBRL DOCUMENT v2.4.0.8
Redeemable Capital Shares - Schedule for Redeemable Capital Shares Activity (Detail) (USD $)
 3 Months Ended 12 Months Ended
Jan. 31, 2014
Oct. 31, 2013
Equity [Abstract]    
Opening balance, Shares 3,550,000 4,950,000
Shares issued, Shares 250,000 600,000
Shares redeemed, Shares (650,000) (2,000,000)
Adjustment to period shares due to currency movement and other, Shares      
Ending balance, Shares 3,150,000 3,550,000
Opening balance, Amount $ 338,556,957 $ 492,510,069
Shares issued, Amount 23,266,960 58,495,917
Shares redeemed, Amount (60,493,063) (194,992,928)
Adjustment to period shares due to currency movement and other, Amount (20,346,535) (17,456,101)
Ending balance, Amount $ 280,984,319 $ 338,556,957