Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Jul. 31, 2024		Jul. 31, 2023		Jul. 31, 2024		Jul. 31, 2023
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Stockholders' equity, beginning balance		$ 7,803.9	[1]	$ 7,378.0	[1]	$ 7,551.0	[2]	$ 7,174.7	[1]
Stockholders' equity, ending balance	[1]	7,925.2		7,528.5		7,925.2		7,528.5
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Stockholders' equity, beginning balance		106.4		89.5		115.1		124.5
Stockholders' equity, ending balance		70.7		108.8		70.7		108.8
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Stockholders' equity, beginning balance						87.4		94.4
Amount recognized in accumulated other comprehensive income on interest rate swap contracts, gross		(21.6)		31.4		(3.1)		14.6
Amount reclassified from accumulated other comprehensive income into earnings, gross		(14.1)		(12.1)		(41.3)		(30.3)
Stockholders' equity, ending balance		$ 53.6		$ 82.5		$ 53.6		$ 82.5

[1] All periods presented have been adjusted to reflect the four-for-one stock split effected on February 16, 2024. Refer to Note 1. General for further information.

[2] All periods presented have been adjusted to reflect the four-for-one stock split effected on February 16, 2024. Refer to Note 1. General for further information.