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Business Segment Information - Schedule of Income (Loss) from Continuing operations by Product Lines and Reportable Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Operating income (loss): |  |  |  |
Operating income (loss) | $ 118.6 | $ 257.8 | $ 361.3 | $ 593.9
Interest expense, net of interest income | (11.7) | (12.2) | (44.2) | (35.4)
Miscellaneous other (expense) income | 1.5 | 0.3 | (4.7) | 0.3
Income before income taxes and earnings (losses) of unconsolidated affiliates | 108.4 | 245.9 | 312.4 | 558.8
Operating Segments | Access Equipment |  |  |  |
Operating income (loss): |  |  |  |
Operating income (loss) | 33.5 | 189.9 | 173.3 | 376.1
Operating Segments | Defense |  |  |  |
Operating income (loss): |  |  |  |
Operating income (loss) | 40.0 | 29.5 | 129.1 | 152.8
Operating Segments | Fire and Emergency |  |  |  |
Operating income (loss): |  |  |  |
Operating income (loss) | 47.6 | 50.7 | 99.1 | 127.2
Operating Segments | Commercial |  |  |  |
Operating income (loss): |  |  |  |
Operating income (loss) | 23.8 | 21.5 | 49.7 | 48.0
Corporate, Non-segment |  |  |  |
Operating income (loss): |  |  |  |
Operating income (loss) | $ (26.3) | $ (33.8) | $ (89.9) | $ (110.2)

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