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Cost-Reduction Actions - Individual Components of Work Force Reduction and Idle Lease Cost (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2019
Restructuring Reserve [Roll Forward] |  |  |  |
Changes in estimates | $ 0.7 |  | $ (2.2) |
Work-force Reductions |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at beginning of period |  | $ 86.2 |  |
Payments |  | (28.8) |  |
Changes in estimates |  | 0.8 |  |
Translation adjustments |  | (0.6) |  |
Balance at end of period |  | 57.6 |  |
2019 remaining six months |  | 44.5 |  |
Beyond 2019 |  | 44.5 |  |
Work-force Reductions | Forecast |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
2019 remaining six months |  |  |  | $ 13.1
Beyond 2019 |  |  |  | 13.1
Work-force Reductions | U.S. |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at beginning of period |  | 6.1 |  |
Payments |  | (1.6) |  |
Changes in estimates |  | (0.6) |  |
Translation adjustments |  | 0.0 |  |
Balance at end of period |  | 3.9 |  |
2019 remaining six months |  | 3.5 |  |
Beyond 2019 |  | 3.5 |  |
Work-force Reductions | U.S. | Forecast |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
2019 remaining six months |  |  |  | 0.4
Beyond 2019 |  |  |  | 0.4
Work-force Reductions | International |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at beginning of period |  | 80.1 |  |
Payments |  | (27.2) |  |
Changes in estimates |  | 1.4 |  |
Translation adjustments |  | (0.6) |  |
Balance at end of period |  | 53.7 |  |
2019 remaining six months |  | 41.0 |  |
Beyond 2019 |  | $ 41.0 |  |
Work-force Reductions | International | Forecast |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
2019 remaining six months |  |  |  | 12.7
Beyond 2019 |  |  |  | $ 12.7

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