Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Apr. 30, 2024		Apr. 30, 2023		Apr. 30, 2024		Apr. 30, 2023
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Common stock, beginning balance	[1]	$ 7,695.3		$ 7,335.7		$ 7,551.0		$ 7,174.7
Common stock, ending balance		7,803.9	[2]	7,378.0	[1]	7,803.9	[2]	7,378.0	[1]
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Common stock, beginning balance		78.3		96.7		115.1		124.5
Common stock, ending balance		106.4		89.5		106.4		89.5
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Common stock, beginning balance						87.4		94.4
Amount recognized in accumulated other comprehensive income on interest rate swap contracts, gross		41.7		2.7		18.5		(16.8)
Amount reclassified from accumulated other comprehensive income into earnings, gross		(13.6)		(9.9)		(27.2)		(18.2)
Common stock, ending balance		$ 80.8		$ 67.9		$ 80.8		$ 67.9

[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.