Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 7,013.8	$ 6,162.8	$ 6,942.0	$ 3,824.8
Amount recognized in other comprehensive income on interest rate swaps contracts, net of tax			40.4
Amount reclassified from other comprehensive income into earnings, net of tax			1.8
Ending balance	7,083.1	$ 6,785.4	7,083.1	6,785.4
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	72.9		72.9
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 ($40.4 million, net of tax)			53.3
Amount reclassified from other comprehensive income into earnings, gross ($1.8 million, net of tax)			2.4
Ending balance	$ 55.2		$ 55.2