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Restructuring Costs - Schedule of Accrued Restructuring Costs Activity (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance | $ 79.3 | $ 64.6 |
Restructuring Costs, Net | 80.5 | 87.6 | $ 62.2
Payments | (69.5) | (61.0) |
Foreign Currency and Other | (23.1) | (11.9) |
Ending balance | 67.2 | 79.3 | 64.6
Employee Severance, Termination Benefits and Relocation Costs [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance | 47.2 | 46.5 |
Restructuring Costs, Net | 45.1 | 64.9 |
Payments | (47.2) | (51.3) |
Foreign Currency and Other | (24.5) | (12.9) |
Ending balance | 20.6 | 47.2 | 46.5
Exited Contractual Commitments and Other [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance | 32.1 | 18.1 |
Restructuring Costs, Net | 35.4 | 22.7 |
Payments | (22.3) | (9.7) |
Foreign Currency and Other | 1.4 | 1.0 |
Ending balance | $ 46.6 | $ 32.1 | $ 18.1

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