Pension and Other Post-Employment Plans - Summary of Pension Assets in Three-Tier Fair Value Hierarchy for Benefit Plan (Details) - USD ($)		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
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		142,500,000	131,600,000	$ 118,800,000
U.S. Benefit Plan | Total
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value	[1]	142,300,000	131,400,000
U.S. Benefit Plan | Total | Cash and cash equivalents
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		4,400,000	4,000,000.0
U.S. Benefit Plan | Total | US Large Cap
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		36,300,000	46,100,000
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		24,600,000	23,800,000
U.S. Benefit Plan | Total | Developed international
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		19,700,000	13,000,000.0
U.S. Benefit Plan | Total | Emerging markets
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		11,900,000	10,700,000
U.S. Benefit Plan | Total | Real estate
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		400,000	400,000
U.S. Benefit Plan | Level 1
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		95,500,000	102,100,000
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		4,400,000	4,000,000.0
U.S. Benefit Plan | Level 1 | US Large Cap
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		36,300,000	46,100,000
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		24,600,000	23,800,000
U.S. Benefit Plan | Level 1 | Developed international
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		10,200,000	7,100,000
U.S. Benefit Plan | Level 1 | Emerging markets
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		9,700,000	10,200,000
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	400,000
U.S. Benefit Plan | Level 2
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		46,800,000	29,300,000
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		9,500,000	5,900,000
U.S. Benefit Plan | Level 2 | Emerging markets
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		2,200,000	500,000
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		57,400,000	55,200,000	$ 47,700,000
Non-U.S. Benefit Plan | Total
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		57,400,000	55,200,000
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		7,400,000	200,000
Non-U.S. Benefit Plan | Total | Government securities
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		0	3,800,000
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]	29,600,000	40,700,000
Non-U.S. Benefit Plan | Total | Corporate bonds
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		15,900,000	10,500,000
Non-U.S. Benefit Plan | Total | Insurance-linked securities
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		4,500,000	0
Non-U.S. Benefit Plan | Level 1
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		400,000	11,200,000
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		400,000	200,000
Non-U.S. Benefit Plan | Level 1 | Government securities
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		0	3,800,000
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		0	7,200,000
Non-U.S. Benefit Plan | Level 1 | Insurance-linked 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
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		52,500,000	44,000,000.0
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		7,000,000.0	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]	29,600,000	40,700,000
Non-U.S. Benefit Plan | Level 2 | Corporate bonds
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		15,900,000	3,300,000
Non-U.S. Benefit Plan | Level 2 | Insurance-linked 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
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		4,500,000	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
Non-U.S. Benefit Plan | Level 3 | Insurance-linked securities
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		4,500,000	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		4,900,000	10,500,000
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		3,800,000	13,500,000
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		31,300,000	9,400,000
Fixed Income Securities | U.S. Benefit Plan | Total | Diversified investment funds
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		5,000,000.0	0
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		4,900,000	10,500,000
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 1 | Diversified investment funds
Fair Value Hierarchy Of Plan Assets By Category [Line Items]
Total assets at fair value		5,000,000.0	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		3,800,000	13,500,000
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		31,300,000	9,400,000
Fixed Income Securities | U.S. Benefit Plan | Level 2 | Diversified investment funds
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 | 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
Fixed Income Securities | U.S. Benefit Plan | Level 3 | Diversified investment funds
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 at December 31, 2020 and 2019, respectively.

[2] These funds primarily invest in a diversified portfolio of equity securities and fixed income securities.