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Pension and Postretirement Benefits - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |
Multiemployer plans, withdrawal obligation |  | $ 15.5 |
Multiemployer plans, plan contributions |  | 0.2 |
Maximum percentage of funding status of plans in red zone | 65.00% |  |
Maximum percentage of funding status of plans in yellow zone | 80.00% |  |
Maximum percentage of funding status of plans in green zone | 80.00% |  |
401(k) plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of employer matching contribution with employee gross pay | 100.00% |  |
Percentage of employer matching contribution match with 100 percent | 3.00% |  |
Percentage of employer matching contribution | 50.00% |  |
Percentage of employer matching contribution match with 50 percent | 2.00% |  |
Expense associated with other employee benefit plans | $ 1.7 | 5.0 | $ 4.8
Postretirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amount expected to contribute in postretirement benefit plans | 0.9 |  |
Funded Plans | Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amount expected to contribute in funded pension plans | 0.8 |  |
Unfunded Pension Plans | Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amount expected to contribute in unfunded pension plans | 0.9 |  |
Foreign Pension Plans | Funded Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial losses for the foreign funded plans recognized in AOCI (before tax) | (2.7) | (2.6) |
Net actuarial losses for the foreign funded plans recognized in AOCI (after tax) | (2.0) | (1.9) |
Foreign Pension Plans | Unfunded Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial losses for the foreign unfunded plans recognized in AOCI (before tax) | (0.8) | (0.7) |
Net actuarial losses for the foreign unfunded plans recognized in AOCI (after tax) | $ (0.6) | $ (0.5) |

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