Segment Information - Reportable Operating Segments (Detail) - USD ($) $ in Millions	3 Months Ended
Jan. 31, 2017	Jan. 31, 2016
Segment Reporting Information
Revenues	$ 1,326.7	$ 1,268.4
Operating profit	23.8	13.6
Adjustment for income from unconsolidated affiliates, net, included in Aviation and Government Services	1.4	2.4
Income from unconsolidated affiliates, net	1.4	2.4
Interest expense	(3.2)	(2.7)
Income from continuing operations before income taxes	22.0	13.3
Corporate
Segment Reporting Information
Operating profit	(34.6)	(35.2)
Segment Reconciling Items
Segment Reporting Information
Adjustment for income from unconsolidated affiliates, net, included in Aviation and Government Services	(1.3)	(2.5)
Adjustment for tax deductions for energy efficient government buildings, included in Technical Solutions	(0.5)	(0.3)
Income from unconsolidated affiliates, net	(1.3)	(2.5)
Business & Industry \| Operating Segments
Segment Reporting Information
Revenues	755.0	743.6
Operating profit	32.4	28.5
Aviation \| Operating Segments
Segment Reporting Information
Revenues	232.0	203.9
Operating profit	5.4	3.9
Emerging Industries Group \| Operating Segments
Segment Reporting Information
Revenues	200.6	199.1
Operating profit	12.4	14.9
Technical Solutions \| Operating Segments
Segment Reporting Information
Revenues	107.7	93.4
Operating profit	8.2	4.1
Government Services \| Operating Segments
Segment Reporting Information
Revenues	31.4	28.5
Operating profit	$ 1.9	$ 0.2

Energy Efficient Government Buildings Tax Credits, Amount

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