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Goodwill and Other Intangible Assets - Changes in Carrying Amounts of Goodwill by Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2018 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | $ 1,834.8 | $ 1,864.2 |
Purchase price adjustments |  |  | (6.2) |
Reallocation |  | 0.0 |  |
Foreign currency translation |  | 0.6 | (2.8) |
Impairment loss |  | 0.0 | (20.3) | $ 0.0
Ending balance | $ 1,834.8 | 1,835.4 | 1,834.8 | 1,864.2
Business & Industry |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | 527.9 | 529.9 |
Purchase price adjustments |  |  | (0.9) |
Reallocation |  | 45.7 |  |
Foreign currency translation |  | 0.3 | (1.1) |
Impairment loss |  |  | 0.0 |
Ending balance | 527.9 | 573.9 | 527.9 | 529.9
Aviation |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | 124.9 | 124.8 |
Purchase price adjustments |  |  | 0.4 |
Reallocation |  | 0.0 |  |
Foreign currency translation |  | 0.1 | (0.2) |
Impairment loss |  |  | 0.0 |
Ending balance | 124.9 | 125.0 | 124.9 | 124.8
Technology & Manufacturing |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | 407.2 | 409.3 |
Purchase price adjustments |  |  | (2.1) |
Reallocation |  | 0.0 |  |
Foreign currency translation |  | 0.0 | 0.0 |
Impairment loss |  |  | 0.0 |
Ending balance | 407.2 | 407.2 | 407.2 | 409.3
Education |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | 557.4 | 561.3 |
Purchase price adjustments |  |  | (3.8) |
Reallocation |  | 1.2 |  |
Foreign currency translation |  | 0.0 | 0.0 |
Impairment loss |  |  | 0.0 |
Ending balance | 557.4 | 558.6 | 557.4 | 561.3
Technical Solutions |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | 158.7 | 180.0 |
Purchase price adjustments |  |  | 0.4 |
Reallocation |  | 11.8 |  |
Foreign currency translation |  | 0.3 | (1.5) |
Impairment loss | (20.3) |  | (20.3) |
Ending balance | 158.7 | 170.7 | 158.7 | 180.0
Healthcare |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance |  | 58.7 | 58.9 |
Purchase price adjustments |  |  | (0.2) |
Reallocation |  | (58.7) |  |
Foreign currency translation |  | 0.0 | 0.0 |
Impairment loss |  |  | 0.0 |
Ending balance | $ 58.7 | $ 0.0 | $ 58.7 | $ 58.9

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