Segment Information - Financial Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Revenues
Revenues	$ 1,612.9	$ 1,607.9
Operating profit (loss)
Operating profit (loss)	45.8	30.3
Income from unconsolidated affiliates	0.9	0.9
Interest expense	(10.2)	(13.5)
Income from continuing operations before income taxes	36.5	17.8
Operating Segments
Revenues
Revenues	1,643.6	1,642.3
Elimination of inter-segment revenues
Revenues
Revenues	(30.6)	(34.4)
Corporate
Operating profit (loss)
Operating profit (loss)	(33.3)	(44.7)
Segment Reconciling Items
Operating profit (loss)
Income from unconsolidated affiliates	(0.9)	(0.9)
Business & Industry | Operating Segments
Revenues
Revenues	820.9	828.8
Operating profit (loss)
Operating profit (loss)	38.2	36.8
Aviation | Operating Segments
Revenues
Revenues	238.7	252.4
Operating profit (loss)
Operating profit (loss)	5.6	3.9
Technology & Manufacturing | Operating Segments
Revenues
Revenues	233.9	236.1
Operating profit (loss)
Operating profit (loss)	16.7	18.2
Education | Operating Segments
Revenues
Revenues	208.0	208.9
Operating profit (loss)
Operating profit (loss)	11.2	10.3
Technical Solutions | Operating Segments
Revenues
Revenues	142.0	116.1
Operating profit (loss)
Operating profit (loss)	$ 8.3	$ 6.8