Stockholders' Equity (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Oct. 31, 2012
Stockholders' Equity
Repurchases of common stock (in shares)	19	29
Share repurchases settled	$ 253,000,000	$ 780,000,000
Share repurchase authorization remaining	8,900,000,000
Tax benefit (expense) on change in unrealized gains/ losses on available for-sale securities
Tax (expense) benefit on change in unrealized gains/ losses on available - for- sale securities	(33,000,000)	5,000,000
Tax (expense) benefit on change in unrealized gains/ losses on cash flow hedges:
Tax benefit (expense) on unrealized gains/losses arising during the period	102,000,000	(152,000,000)
Tax (benefit) expense on gains/losses reclassified into earnings	(17,000,000)	37,000,000
Tax (expense) benefit on change in unrealized gains/ losses on cash flow hedges	85,000,000	(115,000,000)
Tax (expense) benefit on change in unrealized components of defined benefit plans:
Tax benefit on net losses arising during the period		24,000,000
Tax benefit on amortization of actuarial loss and prior service benefit	(5,000,000)	(10,000,000)
Tax expense on curtailments, settlements and other	(1,000,000)	(84,000,000)
Tax (expense) benefit on change in unrealized components of defined benefit plans	(6,000,000)	(70,000,000)
Tax benefit on change in cumulative translation adjustment	18,000,000	14,000,000
Tax benefit (expense) on other comprehensive loss/ income	64,000,000	(166,000,000)
Accumulated Other Comprehensive Loss, net of taxes
Net unrealized gain on available-for-sale securities	57,000,000		87,000,000
Net unrealized loss on cash flow hedges	(264,000,000)		(99,000,000)
Unrealized components of defined benefit plans	(5,000,000,000)		(5,090,000,000)
Cumulative translation adjustment	(465,000,000)		(457,000,000)
Accumulated other comprehensive loss	$ (5,672,000,000)		$ (5,559,000,000)