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Goodwill and Other Intangible assets, Net Future Amortization Expense (Details)
$ in Millions
Oct. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Finite-Lived Intangible Asset, Expected Amortization, Year One $ 1
Finite-Lived Intangible Asset, Expected Amortization, Year Two 1
Finite-Lived Intangible Asset, Expected Amortization, Year Three 1
Finite-Lived Intangible Asset, Expected Amortization, Year Four 1
Finite-Lived Intangible Asset, Expected Amortization, Year Five 0
Finite-Lived Intangible Asset, Expected Amortization, after Year Five $ 2