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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Oct. 31, 2021
Jan. 31, 2021
Income Tax Disclosure [Abstract]            
Effective income tax rate 16.10% (554.90%) 20.50% (666.30%)    
Tax benefit related to remeasurement of deferred tax assets due to UK change in tax rate         $ 534.9  
Deferred tax asset, intra-entity sale of certain intellectual property rights           $ 1,987.9