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Restructuring Costs - Schedule of Accrued Restructuring Costs Activity (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Beginning balance |  |  | $ 67.2 |
Restructuring costs, net | $ 6.7 | $ 45.7 | 17.6 | $ 51.1
Payments |  |  | (34.6) |
Reclassification |  |  | (13.6) |
Foreign Currency and Other |  |  | (1.3) |
Ending balance | 35.3 |  | 35.3 |
Employee severance, termination benefits and relocation costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Beginning balance |  |  | 20.6 |
Restructuring costs, net |  |  | 11.3 |
Payments |  |  | (19.9) |
Reclassification |  |  | 0.0 |
Foreign Currency and Other |  |  | (0.8) |
Ending balance | 11.2 |  | 11.2 |
Exited contractual commitments and other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Beginning balance |  |  | 46.6 |
Restructuring costs, net |  |  | 6.3 |
Payments |  |  | (14.7) |
Reclassification |  |  | (13.6) |
Foreign Currency and Other |  |  | (0.5) |
Ending balance | $ 24.1 |  | $ 24.1 |

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