XML 60 R22.htm IDEA: XBRL DOCUMENT v2.4.0.8
Redeemable Capital Shares - Schedule for Redeemable Capital Shares Activity (Detail) (USD $)
 9 Months Ended 12 Months Ended
Jul. 31, 2013
Oct. 31, 2012
Equity [Abstract]    
Opening balance, Shares 4,950,000 6,350,000
Shares issued, Shares 400,000 150,000
Shares redeemed, Shares (1,500,000) (1,550,000)
Adjustment to period shares due to currency movement and other, Shares      
Ending balance, Shares 3,850,000 4,950,000
Opening balance, Amount $ 492,510,069 $ 635,831,194
Shares issued, Amount 39,224,283 14,846,422
Shares redeemed, Amount (147,095,701) (153,417,420)
Adjustment to period shares due to currency movement and other, Amount (12,184,196) (4,750,127)
Ending balance, Amount $ 372,454,455 $ 492,510,069