Insurance - Insurance Claims Rollforward (Details) - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Net balance at beginning of year		$ 312.7	$ 277.8	$ 282.2
Change in case reserves plus IBNR - current year		104.5	88.7	78.6
Change in case reserves plus IBNR - prior year		35.8	40.1	12.7
Claims paid		(104.8)	(93.9)	(95.7)
Net balance at October 31		348.2	312.7	277.8
Recoverables		69.7	65.9	66.4
Gross, balance at October 31	[1]	417.9	378.6	344.2
Provision related to discontinued operations		$ 12.0	$ 12.0	$ 11.0

[1] Includes reserves related to discontinued operations of approximately $12 million for both 2016 and 2015 and $11 million for 2014.