Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 8,127.5	$ 7,695.3	$ 8,083.6	$ 7,551.0
Ending balance	8,288.1	7,803.9	8,288.1	7,803.9
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	57.2	78.3	59.2	115.1
Ending balance	31.0	106.4	31.0	106.4
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance			44.9	87.4
Amount recognized in accumulated other comprehensive income on interest rate swap contracts, gross	(17.1)	41.7	(8.1)	18.5
Amount reclassified from accumulated other comprehensive income into earnings, gross	(9.1)	(13.6)	(20.1)	(27.2)
Ending balance	$ 23.3	$ 80.8	$ 23.3	$ 80.8