Income Taxes - Additional Information (Detail) $ in Millions	12 Months Ended
	Oct. 31, 2015 USD ($) state	Oct. 31, 2014 USD ($)	Oct. 31, 2013 USD ($)
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Percent	25.30%	39.50%	36.60%
Tax Credits, Work Opportunity Tax Credit	$ 2.8
Tax benefit, deductions for energy efficient government buildings	1.9
Re-measurement of certain unrecognized tax benefits	1.6
Tax Credits, State Employment-based	1.6
Valuation Allowance, Increase of tax provision	0.1	$ 0.0	$ 0.2
Operating loss carryforward from sale of security	0.8	0.0	0.0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	75.6	78.6	80.9
Maximum decrease in unrecognized tax benefits that is reasonably possible	21.0
Uncertain tax positions, interest and penalties accrued	3.2	2.2
Uncertain tax positions, interest and penalties recognized and expensed	$ 1.0	$ 0.9	$ 0.2
Number of states in which entity operates | state	50
State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	$ 9.1