Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2015		Oct. 31, 2014		Jan. 31, 2014	Oct. 31, 2013
Financial Instruments
Assets held in funded deferred compensation plan	$ 5.2	[1]	$ 5.4	[1]
Investments in auction rate securities	13.0	[2]	13.0	[2]
SelectedFinancialAssets	18.2		18.4
Cash and cash equivalents	38.8	[3]	36.7	[3]	34.2	32.6
Insurance deposits	11.4	[4]	11.5	[4]
Other select financial assets	50.2		48.2
Total Financial Assets	68.4		66.6
Assets, Fair Value Disclosure	68.4		66.6
Interest rate swaps	0.2	[5]	0.2	[5]
Contingent consideration liability	1.4	[6]	1.4	[6]
Selected Financial Liabilities	1.6		1.6
Line of credit	362.5	[7]	319.8	[7]
Total Financial Liabilities	364.1		321.4
Total fair value of financial liabilities	364.1		321.4
Fair Value, Inputs, Level 1
Financial Instruments
Cash and cash equivalents	38.8	[3]	36.7	[3]
Insurance deposits	11.4	[4]	11.5	[4]
Fair Value, Inputs, Level 2
Financial Instruments
Line of credit	362.5	[7]	319.8	[7]
Fair Value, Measurements, Recurring
Financial Instruments
SelectedFinancialAssets	18.2		18.4
Total fair value of other financial liabilities	1.6		1.6
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Financial Instruments
Assets held in funded deferred compensation plan	5.2	[1]	5.4	[1]
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Financial Instruments
Interest rate swaps	0.2	[5]	0.2	[5]
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Financial Instruments
Investments in auction rate securities	13.0	[2]	13.0	[2]
Contingent consideration liability	$ 1.4	[6]	$ 1.4	[6]

[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 unaudited consolidated balance sheets. The fair value of the assets held in the funded deferred compensation plan is based on quoted market prices.

[2] For investments in auction rate securities, the fair values are based on discounted cash flow valuation models, primarily utilizing unobservable inputs, which we include in “Other investments” on the accompanying unaudited consolidated balance sheets. See Note 6, “Auction Rate Securities,” for further information.

[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 are included in “Other assets” on the accompanying unaudited consolidated balance sheets. See Note 7, “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 were included in “Other liabilities” on the accompanying unaudited consolidated balance sheets. See Note 8, “Line of Credit,” for more information.

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

[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 8, “Line of Credit,” for further information.