Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2019	Oct. 31, 2018
Deferred tax assets attributable to:
Self-insurance claims (net of recoverables)	$ 83.6	$ 83.5
Deferred and other compensation	25.6	22.7
Accounts receivable allowances	5.6	6.5
Settlement liabilities	3.1	3.3
Other accruals	1.8	(0.3)
Other comprehensive income	0.5	(5.7)
State taxes	0.4	0.5
State net operating loss carryforwards	11.2	15.9
Federal net operating loss carryforwards	0.0	5.4
Tax credits	6.3	21.7
Unrecognized tax benefits	3.0	2.4
Other	0.0	1.7
Gross deferred tax assets	141.2	157.6
Valuation allowance	(8.4)	(12.0)
Total deferred tax assets	132.8	145.7
Deferred tax liabilities attributable to:
Property, plant and equipment	(4.8)	(4.2)
Goodwill and other acquired intangibles	(170.6)	(179.2)
Other	(5.2)	0.0
Total deferred tax liabilities	(180.6)	(183.4)
Net deferred tax liabilities	$ (47.7)	$ (37.8)