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Commitment and Contingencies (Arbitral Award for the Taking of the Company's Venezuelan Operations) - Additional Information (Detail) - VENEZUELA - Compensatory Purposes [Member] $ in Millions | 1 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 27, 2016 USD ($) | Mar. 13, 2015 USD ($) | Jun. 30, 2018 USD ($) Subsidiary | Dec. 31, 2017 USD ($)
Significant Purchase And Supply Commitment [Line Items] |  |  |  |
"Number of subsidiaries awarded grant | Subsidiary" |  |  | 2 | 2,000,000
Compensation awarded to the claimants | $ 36.4 | $ 46.4 | $ 56.9 | $ 56.1
Litigation settlement reduction amount | $ 10.0 |  |  |
Litigation Settlement Interest Percentage Of Interest | 4.50% |  |  |
Litigation settlement accrual interest |  |  | $ 0.6 |
Net Interest Settlements |  |  |  |
Significant Purchase And Supply Commitment [Line Items] |  |  |  |
Compensation awarded to the claimants |  |  |  | $ 17.1
Legal And Other Settlements [Member] |  |  |  |
Significant Purchase And Supply Commitment [Line Items] |  |  |  |
Compensation awarded to the claimants | $ 2.5 |  |  |

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- Details
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