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Borrowing Facilities (Details) (USD $)
6 Months Ended
May 01, 2011
Oct. 31, 2010
Borrowing Facilities, Unsecured [Textuals]    
Credit facilities for unsecured borrowings/Revolving credit facility $ 1,000,000,000  
Borrowing Facilities (Textual) [Abstract]    
Revolving credit period 5 years  
Expiration of revolving credit period January 2012  
Other credit facilities 96,000,000  
Outstanding credit facilities 0 0
Unsecured Debt [Member]
   
Borrowing Facilities, Unsecured [Textuals]    
Credit facilities for unsecured borrowings/Revolving credit facility $ 1,100,000,000