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Restructuring Costs - Schedule of Accrued Restructuring Costs Activity (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | $ 67.2 |
Restructuring costs, net |  | 10.9 | $ 5.4
Payments |  | (19.2) |
Reclassification | [1] | (12.9) |
Foreign Currency and Other |  | (1.3) |
Ending balance |  | 44.7 |
Employee Severance, Termination Benefits and Relocation Costs [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | 20.6 |
Restructuring costs, net |  | 7.0 |
Payments |  | (11.3) |
Foreign Currency and Other |  | (0.5) |
Ending balance |  | 15.8 |
Exited Contractual Commitments and Other [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | 46.6 |
Restructuring costs, net |  | 3.9 |
Payments |  | (7.9) |
Reclassification | [1] | (12.9) |
Foreign Currency and Other |  | (0.8) |
Ending balance |  | $ 28.9 |
[1] | Reclassification due to the adoption of ASU 2016-02 (see Footnote 1)

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