Stockholders' Equity (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Stockholders' Equity
Cash dividends declared per share (in dollars per share)		$ 0.61	$ 0.55	$ 0.50
Repurchases of common stock (in shares)	7,000	92,000	77,000	67,000
Share repurchases settled		$ 2,728,000,000	$ 1,532,000,000	$ 1,619,000,000
Share repurchase authorization remaining	4,900,000,000	4,900,000,000
Tax (expense) benefit on change in unrealized gains/losses on available-for-sale securities:
Tax (provision) benefit on unrealized gains arising during the period		(1,000,000)	(14,000,000)	25,000,000
Tax (provision) benefit on unrealized gains arising during the period		(1,000,000)	(14,000,000)	25,000,000
Tax (provision) benefit on change in unrealized gains (losses) on cash flow hedges:
Tax (provision) benefit on unrealized gains (losses) arising during the period		(174,000,000)	97,000,000	(137,000,000)
Tax benefit on losses (gains) reclassified into earnings		(18,000,000)	(49,000,000)	143,000,000
Tax (provision) benefit on change in unrealized gains (losses) on cash flow hedges		(192,000,000)	48,000,000	6,000,000
Tax (provision) benefit on change in unrealized components of defined benefit plans:
Tax (provision) benefit on (losses) gains arising during the period		181,000,000	(258,000,000)	261,000,000
Tax (benefit) provision on amortization of actuarial loss and prior service benefit		(18,000,000)	(35,000,000)	(31,000,000)
Tax provision on curtailments, settlements and other		(9,000,000)	(5,000,000)	(48,000,000)
Tax (provision) benefit on change in unrealized components of defined benefit plans		154,000,000	(298,000,000)	182,000,000
Tax benefit (provision) on change in cumulative translation adjustment		(27,000,000)	25,000,000	(25,000,000)
Tax (provision) benefit on other comprehensive (loss) income		(66,000,000)	(239,000,000)	188,000,000
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		376,000,000
Other comprehensive income (loss), before reclassification		(2,479,000,000)
Other comprehensive income (loss), Tax expense (benefit)		66,000,000	239,000,000	(188,000,000)
Other comprehensive income (loss), net of taxes		(2,103,000,000)	1,781,000,000	(2,061,000,000)
Net revenue		(111,454,000,000)	(112,298,000,000)	(120,357,000,000)
Cost of products		56,469,000,000	55,632,000,000	59,468,000,000
Interest and other, net		(628,000,000)	(621,000,000)	(876,000,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax, Total		(151,000,000)	(106,000,000)	399,000,000
Share repurchase authorization increase after balance sheet date					10,000,000,000
Change in unrealized gains on available-for-sale securities
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		(1,000,000)
Other comprehensive income (loss), before reclassification		6,000,000	38,000,000	50,000,000
Other comprehensive income (loss), net of taxes		5,000,000	(11,000,000)	50,000,000
Change in unrealized gains on available-for-sale securities | Reclassifications of losses (gains) into earnings
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		(1,000,000)	(49,000,000)
Change in unrealized gains (losses) on cash flow hedges
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		133,000,000
Other comprehensive income (loss), before reclassification		163,000,000	(146,000,000)	198,000,000
Other comprehensive income (loss), net of taxes		296,000,000	(89,000,000)	(58,000,000)
Change in unrealized gains (losses) on cash flow hedges | Reclassifications of losses (gains) into earnings
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		133,000,000	57,000,000	(256,000,000)
Net revenue		21,000,000	(48,000,000)	(423,000,000)
Cost of products		71,000,000	165,000,000	15,000,000
Other operating expenses		9,000,000	(1,000,000)	6,000,000
Interest and other, net		(50,000,000)	10,000,000	(3,000,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax, Total		151,000,000	106,000,000	(399,000,000)
Change in unrealized components of defined benefit plans
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		241,000,000
Other comprehensive income (loss), before reclassification		(2,533,000,000)
Other comprehensive income (loss), net of taxes		(2,292,000,000)	2,006,000,000	(1,981,000,000)
Amortization of actuarial loss and prior service benefit | Reclassifications of losses (gains) into earnings
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Amounts reclassified from accumulated other comprehensive income		241,000,000	291,000,000	141,000,000
Curtailments, settlements and other
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), net of taxes		42,000,000	20,000,000	74,000,000
Losses (gains) reclassified into earnings
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before reclassification		(2,575,000,000)	1,695,000,000	(2,196,000,000)
Change in cumulative translation adjustment
Reclassifications and Taxes related to Items of Other Comprehensive Income (Loss)
Other comprehensive income (loss), before reclassification		(112,000,000)
Other comprehensive income (loss), net of taxes		$ (112,000,000)	$ (125,000,000)	$ (72,000,000)