Postretirement and Other Benefits - Expected Future Benefit Payments (Details) - Pension Benefits $ in Millions	Dec. 31, 2020 USD ($)
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2021	$ 8.6
2022	8.5
2023	8.2
2024	8.1
2025	8.0
2026 - 2030	36.7
France
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2021	0.4
2022	1.0
2023	1.1
2024	1.7
2025	1.7
2026 - 2030	$ 10.2

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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