Financial Derivatives and Hedging - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 3,824.8	$ 3,628.6	$ 3,307.8
Amount recognized in other comprehensive income on interest rate swaps contracts, net of tax	20.0	(15.8)
Amount reclassified from other comprehensive income into earnings, net of tax	6.1	2.8
Ending balance	6,942.0	3,824.8	3,628.6
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	(17.1)	0.0
Ending balance	17.2	(17.1)	0.0
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	(13.0)	0.0	0.0
Amount recognized in other comprehensive income on interest rate swap contracts, gross	26.3	(20.8)
Amount reclassified from other comprehensive income into earnings, gross	8.0	3.7
Ending balance	$ 13.1	$ (13.0)	$ 0.0