Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2017	Oct. 31, 2016
Deferred tax assets attributable to:
Self-insurance claims (net of recoverables)	$ 124.4	$ 108.4
Deferred and other compensation	34.7	33.4
Impairment loss on assets held for sale	0.0	9.2
Accounts receivable allowances	8.9	6.6
Settlement liabilities	6.5	2.6
Other accruals	3.5	2.9
Other comprehensive income	0.4	1.5
State taxes	0.8	0.6
State net operating loss carryforwards	12.3	5.7
Federal net operating loss carryforwards	19.9	0.0
Tax credits	19.9	9.9
Unrecognized tax benefits	7.2	2.6
Other	3.1	3.1
Gross deferred tax assets	241.5	186.5
Valuation allowance	(7.7)	(5.4)
Total deferred tax assets	233.8	181.1
Deferred tax liabilities attributable to:
Property, plant and equipment	(5.9)	(2.2)
Goodwill and other acquired intangibles	(282.0)	(141.8)
Equity in earnings of foreign investments	(3.2)	(3.2)
Total deferred tax liabilities	(291.1)	(147.2)
Net deferred tax (liabilities) assets	$ (57.3)
Net deferred tax (liabilities) assets		$ 33.9