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Commitment and Contingencies (Arbitral Award for the Taking of the Company's Venezuelan Operations) - Additional Information (Detail) - Compensatory Purposes - VENEZUELA - USD ($) $ in Millions |  | 3 Months Ended
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Mar. 13, 2015 | Jun. 30, 2016
Commitments and Contingencies Disclosure [Line Items] |  |
Compensation awarded to the subsidiaries |  | $ 66.4
Compensation awarded to the subsidiaries, annual compound interest rate | 4.50% |
Portion of compensation awarded to the subsidiaries |  | 37.7
Remaining balance of compensation awarded to the subsidiaries |  | 28.7
Principal Investments |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Compensation awarded to the subsidiaries | $ 46.4 |
Net Interest Settlements |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Compensation awarded to the subsidiaries |  | $ 17.5
Legal And Other Settlements |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Compensation awarded to the subsidiaries | $ 2.5 |

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