Financial Derivatives and Hedging - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance	$ 3,627,500,000	$ 3,542,200,000	$ 3,628,600,000	$ 3,307,800,000
Ending balance	3,760,400,000	$ 3,615,500,000	3,760,400,000	3,615,500,000
Accumulated Gain (Loss), Net, Cash Flow Hedge, Before Tax, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance			0
Ending balance	(23,800,000)		(23,800,000)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable To Parent, Before Reclassification And Tax [Roll Forward]
Beginning balance			0	$ 0
Amount recognized in other comprehensive income on interest rate swap contracts, gross			(25,400,000)
Amount reclassified from other comprehensive income into earnings, gross			1,600,000
Ending balance	$ (18,100,000)		$ (18,100,000)