Leases - Balance Sheet Information (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Leases [Abstract]
Operating lease right of use assets	$ 123	$ 119
Finance lease right of use assets	2	2
Total right of use assets	125	121
Operating lease liabilities
Other current liabilities	30	30
Other noncurrent liabilities	96	92
Finance lease liabilities
Notes payable and current maturities of long-term debt	0	1
Long-term debt	1	1
Total lease liabilities	$ 127	$ 124