Taxes on Earnings (Details) $ in Millions	3 Months Ended
	Jan. 31, 2019 USD ($) country	Jan. 31, 2018 USD ($)
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	10.80%	(114.10%)
Net tax benefit	$ 9	$ 1,100
Tax Cuts and Jobs Act of 2017, Income Tax Expense (Benefit)	21
Tax benefits related to restructuring and other charges	12
Uncertain tax position charges	20	43
Tax benefits related other tax charges	4	12
Excess tax benefits from stock options, restricted stock and performance share units	27
Provisional tax benefit		1,100
Deferred tax liability on unremitted earnings		5,500
Provisional deemed repatriation tax		3,200
Remeasurement of deferred assets and liabilities		1,200
Tax benefits related to audit settlements		32
Tax benefits related to acquisition charges		18
Unrecognized tax benefits	7,800
Unrecognized tax benefits that would affect effective tax rate if realized	1,500
Unrecognized tax benefits change	39
Accrued income tax payable for interest and penalties	$ 181	$ 278
Likelihood of no resolution period	12 months
Conclusion of federal, foreign and state tax issues, period	12 months
Reasonably possible decrease in existing unrecognized tax benefits within the next 12 months	$ 6,400
Unrecognized Tax Benefits that Would Impact Effective Tax Rate, Current	$ 743
Other countries with income tax jurisdiction | country	60