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Financing Receivables and Operating Leases (Details) (USD $)
6 Months Ended
Apr. 30, 2011
Oct. 31, 2010
Financing Receivables and Operating Leases    
Financing receivable term, low end of range (in years) 2  
Financing receivable term, high end of range (in years) 5  
Minimum lease payments receivable $ 7,596,000,000 $ 7,094,000,000
Allowance for doubtful accounts (130,000,000) (140,000,000)
Unguaranteed residual value 233,000,000 212,000,000
Unearned income (651,000,000) (596,000,000)
Financing receivables, net 7,048,000,000 6,570,000,000
Less current portion (3,179,000,000) (2,986,000,000)
Amounts due after one year, net 3,869,000,000 3,584,000,000
Equipment leased to customers under operating leases 4,000,000,000 3,500,000,000
Accumulated depreciation on equipment under lease $ 1,200,000,000 $ 1,000,000,000