NEW ACCOUNTING PRONOUNCEMENTS- Initial Adoption (Details) - USD ($) $ in Millions	Apr. 30, 2020	Nov. 01, 2019	Oct. 31, 2019
Assets
Other assets	$ 804	$ 803	$ 611
Liabilities
Other accrued liabilities	233	488	440
Other long-term liabilities	$ 614	617	$ 473
Impact of Adopting Accounting Standards Update 2016-02 - Leases
Assets
Other assets		192
Liabilities
Other accrued liabilities		48
Other long-term liabilities		$ 144