Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Deferred tax assets attributable to:
Self-insurance claims (net of recoverables)	$ 83.5	$ 124.4
Deferred and other compensation	22.7	34.7
Accounts receivable allowances	6.5	8.9
Settlement liabilities	3.3	6.5
Other accruals	(0.3)	3.5
Deferred Tax Assets, Other Comprehensive Loss	(5.7)	0.4
State taxes	0.5	0.8
State net operating loss carryforwards	15.9	12.3
Federal net operating loss carryforwards	5.4	19.9
Tax credits	21.7	19.9
Unrecognized tax benefits	2.4	7.2
Other	1.7	3.1
Gross deferred tax assets	157.6	241.5
Valuation allowance	(12.0)	(7.7)
Total deferred tax assets	145.7	233.8
Deferred tax liabilities attributable to:
Property, plant and equipment	(4.2)	(5.9)
Goodwill and other acquired intangibles	(179.2)	(282.0)
Equity in earnings of foreign investments	0.0	(3.2)
Total deferred tax liabilities	(183.4)	(291.1)
Net deferred tax liabilities	$ (37.8)	$ (57.3)