Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 7,335.7	$ 6,926.1	$ 7,174.7	$ 6,942.0
Ending balance	7,378.0	7,013.8	7,378.0	7,013.8
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	96.7	34.8	124.5	17.2
Ending balance	89.5	86.8	89.5	86.8
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	2.7	50.6	(16.8)	66.3
Amount reclassified from accumulated other comprehensive loss into earnings, gross	(9.9)	1.4	(18.2)	3.3
Ending balance	$ 67.9	$ 65.8	$ 67.9	$ 65.8