Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 8,288.1	$ 7,803.9	$ 8,083.6	$ 7,551.0
Ending balance	8,353.0	7,925.2	8,353.0	7,925.2
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	31.0	106.4	59.2	115.1
Ending balance	35.8	70.7	35.8	70.7
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	12.9	(21.6)	4.8	(3.1)
Amount reclassified from accumulated other comprehensive income into earnings, gross	(8.1)	(14.1)	(28.2)	(41.3)
Ending balance	$ 27.2	$ 53.6	$ 27.2	$ 53.6