Insurance - Causalty Program Insurance Reserves Rollforward (Details) - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2017		Oct. 31, 2016		Oct. 31, 2015
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Net balance at beginning of year		$ 348.2	[1]	$ 312.7	[1]	$ 277.8
Change in case reserves plus IBNR Claims — current year		112.2		104.5		88.7
Change in case reserves plus IBNR Claims — prior years		23.1		35.8		40.1
Claims paid		(105.2)		(104.8)		(93.9)
GCA Services acquisition		34.1		0.0		0.0
Net balance at end of year	[1]	412.5		348.2		312.7
Recoverables		73.1		69.7		65.9
Gross balance at end of year		485.6		417.9		378.6
Provision related to discontinued operations		$ 10.0		$ 12.0		$ 12.0

[1] Includes reserves related to discontinued operations of approximately $10 million for 2017 and $12 million for both 2016 and 2015.