Stockholders' Equity (Details) (USD $) Share data in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2011	Aug. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010
Stockholders' Equity
Share repurchases executed (in shares)			126		242
Share repurchases settled (in shares)			128	55	245	144
Share repurchases settled			$ 4,600,000,000	$ 2,600,000,000	$ 9,617,000,000	$ 7,079,000,000
Shares settled during period, executed in prior period (in shares)					4
Share repurchases executed during period, which will settle in next period (in shares)			1
Share repurchase authorization remaining					1,300,000,000
Share repurchase authorization amount		10,000,000,000
Additional authorization for future share repurchases	10,000,000,000
Comprehensive Income
Net earnings			1,926,000,000	1,773,000,000	6,835,000,000	6,223,000,000
Net change in unrealized gains on available-for-sale securities, net of tax of $3 million and $1 million for the three months and net of tax of $1 million and $6 million for the nine months ended July 31, 2011 and 2010, respectively			5,000,000	2,000,000	15,000,000	11,000,000
Net change in unrealized gains/losses on cash flow hedges:
Unrealized (losses) gains recognized in OCI, net of tax of $46 million and $58 million for the three months and net of tax benefit of $195 million and net of tax of $296 million for nine months ended July 31, 2011 and 2010, respectively			49,000,000	85,000,000	(389,000,000)	532,000,000
Losses (gains) reclassified into income, net of tax benefit of $117 million and net of tax of $145 million for the three months and net of tax benefit of $226 million and net of tax of $176 million for the nine months ended July 31, 2011 and 2010, respectively			222,000,000	(251,000,000)	435,000,000	(321,000,000)
Net change in unrealized gains (losses) on cash flow hedges			271,000,000	(166,000,000)	46,000,000	211,000,000
Net change in cumulative translation adjustment, net of tax of $6 million and $18 million for the three months and net of tax of $24 million and $16 million for the nine months ended July 31, 2011 and 2010, respectively			3,000,000	(53,000,000)	135,000,000	(42,000,000)
Net change in unrealized components of defined benefit plans, net of tax of $6 million and $5 million for the three months and net of tax of $126 million and $73 million for the nine months ended July 31, 2011 and 2010, respectively			39,000,000	32,000,000	367,000,000	127,000,000
Comprehensive income			2,244,000,000	1,588,000,000	7,398,000,000	6,530,000,000
Components of other comprehensive income, tax effects
Net change in unrealized gains on available-for-sale securities, tax effect			3,000,000	1,000,000	1,000,000	6,000,000
Unrealized (losses) gains recognized in OCI, tax effect			46,000,000	58,000,000	195,000,000	296,000,000
Losses (gains) reclassified into income, tax effect			117,000,000	145,000,000	226,000,000	176,000,000
Net change in cumulative translation adjustment, tax effect			6,000,000	18,000,000	24,000,000	16,000,000
Net change in unrealized components of defined benefit plans, tax effect			6,000,000	5,000,000	126,000,000	73,000,000
Accumulated Other Comprehensive Loss, net of taxes
Net unrealized gain on available-for-sale securities	35,000,000		35,000,000		35,000,000		20,000,000
Net unrealized loss on cash flow hedges	(155,000,000)		(155,000,000)		(155,000,000)		(201,000,000)
Cumulative translation adjustment	(296,000,000)		(296,000,000)		(296,000,000)		(431,000,000)
Unrealized components of defined benefit plans	(2,858,000,000)		(2,858,000,000)		(2,858,000,000)		(3,225,000,000)
Accumulated other comprehensive loss	$ (3,274,000,000)		$ (3,274,000,000)		$ (3,274,000,000)		$ (3,837,000,000)