Stockholders' Equity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Stockholders' Equity
Cash dividends declared per share (in dollars per share)	$ 0.55	$ 0.50	$ 0.40
Repurchases of common stock (in shares)	77	67	259
Share repurchases settled ( in shares)			262
Share repurchases settled	$ 1,532,000,000	$ 1,619,000,000	$ 10,117,000,000
Share repurchases executed during period, which will settle in next period			3
Share repurchase authorization increase after balance sheet date	0	0	10,000,000,000
Share repurchase authorization remaining	7,600,000,000
Tax (expense) benefit on change in unrealized gains/losses on available-for-sale securities:
Tax (expense) benefit on unrealized gains/losses arising during the period	(14,000,000)	25,000,000
Tax (expense) benefit on change in unrealized gains/losses on available-for-sale securities	(14,000,000)	25,000,000
Tax benefit (expense) on change in unrealized gains/losses on cash flow hedges:
Tax benefit (expense) on unrealized gains/losses arising during the period	97,000,000	(137,000,000)	86,000,000
Tax (benefit) expense on gains/losses reclassified into earnings	(49,000,000)	143,000,000	(210,000,000)
Tax benefit (expense) on change in unrealized gains/losses on cash flow hedges	48,000,000	6,000,000	(124,000,000)
Tax (expense) benefit on change in unrealized components of defined benefit plans:
Tax (expense) benefit on net losses arising during the period	(258,000,000)	261,000,000	263,000,000
Tax (benefit) expense on amortization of actuarial loss and prior service benefit	(35,000,000)	(31,000,000)	(36,000,000)
Tax (expense) benefit on curtailments, settlements and other	(5,000,000)	(48,000,000)	2,000,000
Tax (expense) benefit on change in unrealized components of defined benefit plans	(298,000,000)	182,000,000	229,000,000
Tax benefit (expense) on change in cumulative translation adjustment	25,000,000	(25,000,000)	(20,000,000)
Tax (expense) benefit on other comprehensive income/loss	(239,000,000)	188,000,000	85,000,000
Accumulated Other Comprehensive Loss, net of taxes
Net unrealized gain on available-for-sale securities	76,000,000	87,000,000	37,000,000
Net unrealized loss on cash flow hedges	(188,000,000)	(99,000,000)	(41,000,000)
Unrealized components of defined benefit plans	(3,084,000,000)	(5,090,000,000)	(3,109,000,000)
Cumulative translation adjustment	(582,000,000)	(457,000,000)	(385,000,000)
Accumulated other comprehensive loss	$ (3,778,000,000)	$ (5,559,000,000)	$ (3,498,000,000)