Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 7,378.0	$ 7,013.8	$ 7,174.7	$ 6,942.0
Ending balance	7,528.5	7,083.1	7,528.5	7,083.1
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	89.5	86.8	124.5	17.2
Ending balance	108.8	72.9	108.8	72.9
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance			94.4	13.1
Amount recognized in accumulated other comprehensive loss on interest rate swap contracts, gross	31.4	(13.0)	14.6	53.3
Amount reclassified from accumulated other comprehensive loss into earnings, gross	(12.1)	(0.9)	(30.3)	2.4
Ending balance	$ 82.5	$ 55.2	$ 82.5	$ 55.2