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Business Segment Information - Schedule of Net Sales by Geographical Segments (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | $ 1,695.1 | $ 1,803.4
North America |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 1,492.7 | 1,580.1
Europe, Africa and Middle East |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 81.0 | 142.5
Rest of the World |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 121.4 | 80.8
Intersegment Eliminations |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | (2.5) | (4.9)
Intersegment Eliminations | North America |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | (2.5) | (5.0)
Intersegment Eliminations | Europe, Africa and Middle East |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues |  | 0.1
Access Equipment |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 717.9 | 826.5
Access Equipment | Operating Segments |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 717.9 | 826.5
Access Equipment | Operating Segments | North America |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 547.1 | 646.2
Access Equipment | Operating Segments | Europe, Africa and Middle East |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 74.2 | 113.7
Access Equipment | Operating Segments | Rest of the World |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 96.6 | 66.6
Defense |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 492.6 | 463.8
Defense | Operating Segments |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 493.1 | 464.1
Defense | Operating Segments | North America |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 485.6 | 448.1
Defense | Operating Segments | Europe, Africa and Middle East |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 6.0 | 15.9
Defense | Operating Segments | Rest of the World |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 1.5 | 0.1
Defense | Intersegment Eliminations |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 0.5 | 0.3
Fire and Emergency |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 260.0 | 291.2
Fire and Emergency | Operating Segments |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 262.4 | 295.5
Fire and Emergency | Operating Segments | North America |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 243.9 | 273.1
Fire and Emergency | Operating Segments | Europe, Africa and Middle East |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 0.4 | 11.0
Fire and Emergency | Operating Segments | Rest of the World |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 18.1 | 11.4
Fire and Emergency | Intersegment Eliminations |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 2.4 | 4.3
Commercial |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 223.9 | 221.6
Commercial | Operating Segments |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 224.2 | 222.2
Commercial | Operating Segments | North America |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 218.6 | 217.7
Commercial | Operating Segments | Europe, Africa and Middle East |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 0.4 | 1.8
Commercial | Operating Segments | Rest of the World |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | 5.2 | 2.7
Commercial | Intersegment Eliminations |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Revenues | $ 0.3 | $ 0.6

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