Taxes on Earnings (Detail 6) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Current and long term deferred tax assets and liabilities
Deferred tax assets	$ 2,403	$ 4,663
Deferred tax liabilities	(228)	(104)
Deferred tax assets net of deferred tax liabilities	2,175	4,559
Advance royalty proceeds received from multi-year intercompany licensing arrangements	63	439
Operating loss carryforwards
Adjustment to reduce deferred tax asset	101	186
Valuation allowance on deferred tax assets	8,209	$ 2,789
Federal
Operating loss carryforwards
Operating loss carryforwards	769
Capital loss carryforwards	6,100
Federal | Capital Loss Carryforwards
Operating loss carryforwards
Valuation allowance on deferred tax assets	1,200
State
Operating loss carryforwards
Operating loss carryforwards	2,800
Valuation allowance on deferred tax assets	422
Capital loss carryforwards	6,400
State | Operating loss carryforwards
Operating loss carryforwards
Valuation allowance on deferred tax assets	160
State | Capital Loss Carryforwards
Operating loss carryforwards
Valuation allowance on deferred tax assets	238
Foreign
Operating loss carryforwards
Operating loss carryforwards	19,900
Capital loss carryforwards	58
Foreign | Operating loss carryforwards
Operating loss carryforwards
Valuation allowance on deferred tax assets	5,000
Foreign | Capital Loss Carryforwards
Operating loss carryforwards
Valuation allowance on deferred tax assets	13
Additional Paid-in Capital
Operating loss carryforwards
Adjustment to reduce deferred tax asset	$ 55