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Pensions and Other Post-retirement Benefits - Additional Information (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Retirement Benefits [Abstract] |  |
Pension plans contributions | $ 3.8 | $ 3.5
Total estimated pension plans contributions for the fiscal year | $ 7.6 |

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