Acquisitions - Final Purchase Price and Related Allocations (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Nov. 01, 2012		Oct. 01, 2014		Aug. 01, 2014		Mar. 01, 2014		May 01, 2012		Aug. 01, 2013		Sep. 01, 2013		Oct. 31, 2014		Oct. 31, 2013		Oct. 31, 2012
Purchase price:
Fair value of contingent consideration															$ 1.4	[1]	$ 1.6	[1]
Allocated to:
Goodwill															904.6		872.4		751.6
Goodwill, deductible for tax purposes															27.3
Air Serv
Purchase price:
Cash consideration	162.9
Fair value of contingent consideration	0
Holdback liability	0
Total consideration	162.9
Allocated to:
Trade accounts receivable	52.7	[2]
Other current and noncurrent assets	16.2
Property, plant and equipment	16.7
Other intangible assets	44.6	[3]
Goodwill	88.8	[4]
Total assets acquired	219.0
Liabilities assumed	(56.1)
Net assets acquired	162.9
Uncollectable receivable amount															0.4
HHA
Purchase price:
Cash consideration	33.7
Fair value of contingent consideration	0
Holdback liability	0
Total consideration	33.7
Allocated to:
Trade accounts receivable	3.2	[2]
Other current and noncurrent assets	2.2
Property, plant and equipment	0.1
Other intangible assets	15.0	[3]
Goodwill	23.8	[4]
Total assets acquired	44.3
Liabilities assumed	(10.6)
Net assets acquired	33.7
GBM
Purchase price:
Cash consideration			19.4
Fair value of contingent consideration			3.3
Holdback liability			0
Total consideration			22.7
Allocated to:
Trade accounts receivable			9.7	[2]
Other current and noncurrent assets			5.1
Property, plant and equipment			0.6
Other intangible assets			1.7	[3]
Goodwill			14.9	[4]
Total assets acquired			32.0
Liabilities assumed			(9.3)
Net assets acquired			22.7
Airco
Purchase price:
Cash consideration					17.8
Fair value of contingent consideration					0
Holdback liability					0
Total consideration					17.8
Allocated to:
Trade accounts receivable					3.2	[2]
Other current and noncurrent assets					1.1
Property, plant and equipment					0.3
Other intangible assets					7.1	[3]
Goodwill					10.6	[4]
Total assets acquired					22.3
Liabilities assumed					(4.5)
Net assets acquired					17.8
Alpha
Purchase price:
Cash consideration							12.2
Fair value of contingent consideration							0
Holdback liability							0
Total consideration							12.2
Allocated to:
Trade accounts receivable							4.6	[2]
Other current and noncurrent assets							0.1
Property, plant and equipment							0.5
Other intangible assets							3.3	[3]
Goodwill							6.8	[4]
Total assets acquired							15.3
Liabilities assumed							(3.1)
Net assets acquired							12.2
Calvert-Jones
Purchase price:
Cash consideration	6.1
Fair value of contingent consideration	0
Holdback liability	0
Total consideration	6.1
Allocated to:
Trade accounts receivable	1.6	[2]
Other current and noncurrent assets	0.1
Property, plant and equipment	0.1
Other intangible assets	2.6	[3]
Goodwill	4.0	[4]
Total assets acquired	8.4
Liabilities assumed	(2.3)
Net assets acquired	6.1
TEGG
Purchase price:
Cash consideration									5.7
Fair value of contingent consideration									0
Holdback liability									0
Total consideration									5.7
Allocated to:
Trade accounts receivable									0.3	[2]
Other current and noncurrent assets									0.9
Property, plant and equipment									2.2
Other intangible assets									2.2	[3]
Goodwill									2.0	[4]
Total assets acquired									7.6
Liabilities assumed									(1.9)
Net assets acquired									5.7
Blackjack
Purchase price:
Cash consideration											5.2
Fair value of contingent consideration											0
Holdback liability											0
Total consideration											5.2
Allocated to:
Trade accounts receivable											4.6	[2]
Other current and noncurrent assets											0.2
Property, plant and equipment											0.3
Other intangible assets											0.9	[3]
Goodwill											1.8	[4]
Total assets acquired											7.8
Liabilities assumed											(2.6)
Net assets acquired											5.2
BEST
Purchase price:
Cash consideration													2.9
Fair value of contingent consideration													1.6
Holdback liability													0.4
Total consideration													4.9
Allocated to:
Trade accounts receivable													1.2	[2]
Other current and noncurrent assets													0
Property, plant and equipment													0.6
Other intangible assets													1.4	[3]
Goodwill													1.9	[4]
Total assets acquired													5.1
Liabilities assumed													(0.2)
Net assets acquired													4.9
Uncollectable receivable amount															$ 0.4

[1] 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.

[2] Represents fair value of trade accounts receivable, which for each of the Air Serv and BEST acquisitions includes a $0.4 million adjustment to gross contractual amounts that are expected to be uncollectible. The fair values of trade accounts receivable acquired in the HHA, GBM, Airco, Alpha, Calvert-Jones, TEGG, and Blackjack acquisitions approximate their respective contractual amounts.

[3] The following table summarizes the weighted-average useful lives in years of the acquired other intangible assets, consisting primarily of customer contracts and relationships for each respective acquisition:Air Serv HHA GBMAirco Alpha Calvert-Jones TEGG Blackjack BEST14 13 1012 9 12 14 11 9

[4] The total amount of goodwill that is deductible for tax purposes is $27.3 million.