Fair Value of Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2014		Oct. 31, 2013		Oct. 31, 2012	Oct. 31, 2011
Financial Instruments [Line Items]
Assets held in funded deferred compensation plan	$ 5.4	[1]	$ 5.4	[1]
Investments in auction rate securities	13.0	[2]	13.0	[2]
Fair value of recurring assets	18.4		18.4
Cash and cash equivalents	36.7	[3]	32.6	[3]	43.5	26.5
Insurance deposits	11.5	[4]	28.5	[4]
Other Select Financial Assets	48.2		61.1
Total Financial Assets	66.6		79.5
Interest rate swap	0.2	[5]	0.2	[5]
Contingent consideration liability	1.4	[6]	1.6	[6]
Line of credit	319.8	[7]	314.9	[7]
Total Financial Liabilities	321.4		316.7
Other Select Financial Assets Fair Value Disclosure	48.2		61.1
Fair value of recurring liabilities	1.6		1.8
Total Fair Value of Financial Liabilities	321.4		316.7
Fair Value, Inputs, Level 1
Financial Instruments [Line Items]
Insurance deposits	11.5	[4]	28.5	[4]
Cash and cash equivalents	36.7	[3]	32.6	[3]
Fair Value, Inputs, Level 2
Financial Instruments [Line Items]
Line of credit	319.8	[7]	314.9	[7]
Fair Value Measurements, Recurring Basis
Financial Instruments [Line Items]
Fair value of recurring assets	18.4		18.4
Fair value of recurring liabilities	1.6		1.8
Fair Value Measurements, Recurring Basis | Fair Value, Inputs, Level 1
Financial Instruments [Line Items]
Assets held in funded deferred compensation plan	5.4	[1]	5.4	[1]
Fair Value Measurements, Recurring Basis | Fair Value, Inputs, Level 2
Financial Instruments [Line Items]
Interest rate swap	0.2	[5]	0.2	[5]
Fair Value Measurements, Recurring Basis | Fair Value, Inputs, Level 3
Financial Instruments [Line Items]
Contingent consideration liability	1.4	[6]	1.6	[6]
Investments in auction rate securities	$ 13.0	[2]	$ 13.0	[2]

[1] Represents investments held in a Rabbi trust associated with one of our deferred compensation plans, which we include in “Other assets” on the accompanying consolidated balance sheets. The fair value of the assets held in the funded deferred compensation plan is based on quoted market prices. See Note 11, “Employee Benefit Plans,” for further information.

[2] For investments in auction rate securities, the fair values were based on discounted cash flow valuation models, primarily utilizing unobservable inputs, which we include in “Other investments” on the accompanying consolidated balance sheets. See Note 6, “Auction Rate Securities,” for the roll-forward of assets measured at fair value using significant unobservable Level 3 inputs and the sensitivity analysis of significant inputs

[3] Cash and cash equivalents are stated at nominal value, which equals fair value.

[4] Represents restricted insurance deposits that are used to collateralize our insurance obligations and are stated at nominal value, which equals fair value. These insurance deposits were acquired as part of the OneSource Services Inc. acquisition, and are included in “Other assets” on the accompanying consolidated balance sheets. See Note 9, “Insurance,” for further information.

[5] Represents interest rate swap derivatives designated as cash flow hedges. The fair values of the interest rate swaps are estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rates and the expected cash flows at current market interest rates using observable benchmarks for LIBOR forward rates at the end of the period. The fair values of the interest rate swap liabilities are included in “Other liabilities” on the accompanying consolidated balance sheets. See Note 10, “Line of Credit,” for more information.

[6] Our contingent consideration liability was incurred in connection with the acquisition of BEST in 2013. The contingent consideration liability is measured at fair value and is included in “Other liabilities” on the accompanying consolidated balance sheets. The fair value is based on a pre-defined forecasted adjusted income from operations using a probability weighted income approach and discounted using our fixed borrowing rate. See Note 4, “Acquisitions,” for further information.

[7] Represents outstanding borrowings under our syndicated line of credit. Due to variable interest rates, the carrying value of outstanding borrowings under our line of credit approximates the fair value. See Note 10, “Line of Credit,” for further information.