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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Revenue from External Customer [Line Items]
Revenues	$ 1,607.9	$ 1,588.3
Business & Industry
Revenue from External Customer [Line Items]
Revenues	774.5
Aviation
Revenue from External Customer [Line Items]
Revenues	252.4
Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	236.1
Education
Revenue from External Customer [Line Items]
Revenues	204.7
Technical Solutions
Revenue from External Customer [Line Items]
Revenues	107.9
Healthcare
Revenue from External Customer [Line Items]
Revenues	66.7
Janitorial
Revenue from External Customer [Line Items]
Revenues	989.9
Janitorial | Business & Industry
Revenue from External Customer [Line Items]
Revenues	549.7
Janitorial | Aviation
Revenue from External Customer [Line Items]
Revenues	31.1
Janitorial | Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	187.8
Janitorial | Education
Revenue from External Customer [Line Items]
Revenues	183.3
Janitorial | Technical Solutions
Revenue from External Customer [Line Items]
Revenues	0.0
Janitorial | Healthcare
Revenue from External Customer [Line Items]
Revenues	38.0
Parking
Revenue from External Customer [Line Items]
Revenues	222.1
Parking | Business & Industry
Revenue from External Customer [Line Items]
Revenues	114.4
Parking | Aviation
Revenue from External Customer [Line Items]
Revenues	85.8
Parking | Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	7.4
Parking | Education
Revenue from External Customer [Line Items]
Revenues	0.8
Parking | Technical Solutions
Revenue from External Customer [Line Items]
Revenues	0.0
Parking | Healthcare
Revenue from External Customer [Line Items]
Revenues	13.7
Facility Services
Revenue from External Customer [Line Items]
Revenues	204.7
Facility Services | Business & Industry
Revenue from External Customer [Line Items]
Revenues	110.2
Facility Services | Aviation
Revenue from External Customer [Line Items]
Revenues	18.0
Facility Services | Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	40.8
Facility Services | Education
Revenue from External Customer [Line Items]
Revenues	20.7
Facility Services | Technical Solutions
Revenue from External Customer [Line Items]
Revenues	0.0
Facility Services | Healthcare
Revenue from External Customer [Line Items]
Revenues	15.0
Airline Services
Revenue from External Customer [Line Items]
Revenues	117.7
Airline Services | Business & Industry
Revenue from External Customer [Line Items]
Revenues	0.2
Airline Services | Aviation
Revenue from External Customer [Line Items]
Revenues	117.5
Airline Services | Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	0.0
Airline Services | Education
Revenue from External Customer [Line Items]
Revenues	0.0
Airline Services | Technical Solutions
Revenue from External Customer [Line Items]
Revenues	0.0
Airline Services | Healthcare
Revenue from External Customer [Line Items]
Revenues	0.0
Building & Energy Solutions
Revenue from External Customer [Line Items]
Revenues	107.9
Building & Energy Solutions | Business & Industry
Revenue from External Customer [Line Items]
Revenues	0.0
Building & Energy Solutions | Aviation
Revenue from External Customer [Line Items]
Revenues	0.0
Building & Energy Solutions | Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	0.0
Building & Energy Solutions | Education
Revenue from External Customer [Line Items]
Revenues	0.0
Building & Energy Solutions | Technical Solutions
Revenue from External Customer [Line Items]
Revenues	107.9
Building & Energy Solutions | Healthcare
Revenue from External Customer [Line Items]
Revenues	0.0
Operating Segments
Revenue from External Customer [Line Items]
Revenues	1,642.3
Operating Segments | Business & Industry
Revenue from External Customer [Line Items]
Revenues	774.5	756.3
Operating Segments | Aviation
Revenue from External Customer [Line Items]
Revenues	252.4	260.1
Operating Segments | Technology & Manufacturing
Revenue from External Customer [Line Items]
Revenues	236.1	232.2
Operating Segments | Education
Revenue from External Customer [Line Items]
Revenues	204.7	206.9
Operating Segments | Technical Solutions
Revenue from External Customer [Line Items]
Revenues	107.9	104.0
Operating Segments | Healthcare
Revenue from External Customer [Line Items]
Revenues	66.7	67.7
Intersegment Eliminations
Revenue from External Customer [Line Items]
Revenues	$ (34.4)	$ (38.9)

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 606
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