Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 6,942.0	$ 3,824.8
Amount recognized in other comprehensive income on interest rate swaps contracts, net of tax	11.9
Amount reclassified from other comprehensive income into earnings, net of tax	(1.4)
Ending balance	6,926.1	5,989.9
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	17.2
Ending balance	34.8
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	13.1	$ (13.0)
Amount recognized in other comprehensive income on interest rate swap contracts, gross ($11.9, net of tax)	15.7
Amount reclassified from other comprehensive income into earnings, gross ($1.4, net of tax)	1.9
Ending balance	$ 26.4