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Pension and Other Post-Employment Plans - Summary of Pension Assets in Three-Tier Fair Value Hierarchy for Benefit Plan (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Receivables $ 200,000 $ 200,000  
U.S. Benefit Plan      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 131,600,000 118,800,000 $ 131,700,000
U.S. Benefit Plan | Total      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value [1] 131,400,000 118,600,000  
U.S. Benefit Plan | Total | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 4,000,000.0 4,800,000  
U.S. Benefit Plan | Total | US Large Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 46,100,000 36,000,000.0  
U.S. Benefit Plan | Total | US Small and Mid Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 23,800,000 19,600,000  
U.S. Benefit Plan | Total | Developed international      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 13,000,000.0 15,700,000  
U.S. Benefit Plan | Total | Emerging markets      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 10,700,000 10,900,000  
U.S. Benefit Plan | Total | Real estate      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 400,000 300,000  
U.S. Benefit Plan | Level 1      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 102,100,000 87,900,000  
U.S. Benefit Plan | Level 1 | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 4,000,000.0 4,800,000  
U.S. Benefit Plan | Level 1 | US Large Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 46,100,000 36,000,000.0  
U.S. Benefit Plan | Level 1 | US Small and Mid Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 23,800,000 19,600,000  
U.S. Benefit Plan | Level 1 | Developed international      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 7,100,000 8,900,000  
U.S. Benefit Plan | Level 1 | Emerging markets      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 10,200,000 10,100,000  
U.S. Benefit Plan | Level 1 | Real estate      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 400,000 300,000  
U.S. Benefit Plan | Level 2      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 29,300,000 30,700,000  
U.S. Benefit Plan | Level 2 | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 2 | US Large Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 2 | US Small and Mid Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 2 | Developed international      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 5,900,000 6,800,000  
U.S. Benefit Plan | Level 2 | Emerging markets      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 500,000 800,000  
U.S. Benefit Plan | Level 2 | Real estate      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3 | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3 | US Large Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3 | US Small and Mid Cap      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3 | Developed international      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3 | Emerging markets      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
U.S. Benefit Plan | Level 3 | Real estate      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Non-U.S. Benefit Plan      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 55,200,000 47,700,000 $ 54,700,000
Non-U.S. Benefit Plan | Total      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 55,200,000 47,700,000  
Non-U.S. Benefit Plan | Total | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 200,000 100,000  
Non-U.S. Benefit Plan | Total | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 3,800,000 2,800,000  
Non-U.S. Benefit Plan | Total | Diversified investment funds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value [2] 40,700,000 36,400,000  
Non-U.S. Benefit Plan | Total | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 10,500,000 8,400,000  
Non-U.S. Benefit Plan | Level 1      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 11,200,000 9,100,000  
Non-U.S. Benefit Plan | Level 1 | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 200,000 100,000  
Non-U.S. Benefit Plan | Level 1 | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 3,800,000 2,800,000  
Non-U.S. Benefit Plan | Level 1 | Diversified investment funds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value [2] 0 0  
Non-U.S. Benefit Plan | Level 1 | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 7,200,000 6,200,000  
Non-U.S. Benefit Plan | Level 2      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 44,000,000.0 38,600,000  
Non-U.S. Benefit Plan | Level 2 | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Non-U.S. Benefit Plan | Level 2 | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Non-U.S. Benefit Plan | Level 2 | Diversified investment funds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value [2] 40,700,000 36,400,000  
Non-U.S. Benefit Plan | Level 2 | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 3,300,000 2,200,000  
Non-U.S. Benefit Plan | Level 3      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Non-U.S. Benefit Plan | Level 3 | Cash and cash equivalents      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Non-U.S. Benefit Plan | Level 3 | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Non-U.S. Benefit Plan | Level 3 | Diversified investment funds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value [2] 0 0  
Non-U.S. Benefit Plan | Level 3 | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Fixed Income Securities | U.S. Benefit Plan | Total | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 10,500,000 8,200,000  
Fixed Income Securities | U.S. Benefit Plan | Total | Asset-backed securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 13,500,000 12,500,000  
Fixed Income Securities | U.S. Benefit Plan | Total | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 9,400,000 10,600,000  
Fixed Income Securities | U.S. Benefit Plan | Level 1 | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 10,500,000 8,200,000  
Fixed Income Securities | U.S. Benefit Plan | Level 1 | Asset-backed securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Fixed Income Securities | U.S. Benefit Plan | Level 1 | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Fixed Income Securities | U.S. Benefit Plan | Level 2 | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Fixed Income Securities | U.S. Benefit Plan | Level 2 | Asset-backed securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 13,500,000 12,500,000  
Fixed Income Securities | U.S. Benefit Plan | Level 2 | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 9,400,000 10,600,000  
Fixed Income Securities | U.S. Benefit Plan | Level 3 | Government securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Fixed Income Securities | U.S. Benefit Plan | Level 3 | Asset-backed securities      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value 0 0  
Fixed Income Securities | U.S. Benefit Plan | Level 3 | Corporate bonds      
Fair Value Hierarchy Of Plan Assets By Category [Line Items]      
Total assets at fair value $ 0 $ 0  
[1]
Total assets at fair value in the table above exclude a net receivable of $0.2 million and $0.2 million at December 31, 2019 and 2018, respectively.
[2]
These funds primarily invest in a diversified portfolio of equity securities and fixed income securities.