Accounting Policies (Details Textual 1) (USD $) In Millions, unless otherwise specified	Oct. 31, 2013
Variable Interest Entity [Line Items]
Maximum loss exposure for unconsolidated variable interest entities	$ 62
Primary beneficiary [Member]
Variable Interest Entity [Line Items]
Number of variable interest entities	31
Number of properties represented by variable interest entities	22
Not primary beneficiary [Member]
Variable Interest Entity [Line Items]
Number of variable interest entities	66