Pension, Post-Retirement and Post-Employment Plans - Foreign Pension Plans (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans
Pension and post-retirement benefits	$ 43.3	$ 50.8
Pension and SERP Benefits \| Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans
Projected benefit obligation	26.1	26.6	$ 23.3
Pension and post-retirement benefits	20.6	19.8
Other Plans \| Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans
Pension and post-retirement benefits	$ 1.4	$ 1.1

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant