Financing Receivables and Operating Leases (Details) (USD $)	12 Months Ended
	Oct. 31, 2011 Year	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	$ 7,721,000,000	$ 7,094,000,000
Unguaranteed residual value	233,000,000	212,000,000
Unearned income	(647,000,000)	(596,000,000)
Financing receivables, gross	7,307,000,000	6,710,000,000
Allowance for doubtful accounts	(130,000,000)	(140,000,000)
Financing receivables, net	7,177,000,000	6,570,000,000
Less current portion	(3,162,000,000)	(2,986,000,000)
Amounts due after one year, net	4,015,000,000	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	1,300,000,000	1,000,000,000
Scheduled maturities of minimum lease payments receivable:
2012	3,518,000,000
2013	2,256,000,000
2014	1,257,000,000
2015	517,000,000
Thereafter	173,000,000
Total	7,721,000,000	7,094,000,000
Minimum future rentals on non-cancelable operating leases:
2012	1,273,000,000
2013	801,000,000
2014	414,000,000
2015	152,000,000
Thereafter	42,000,000
Total	$ 2,682,000,000