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Benefit Plans and Other Postretirement Benefits, Pension plans with a projected benefit obligation in excess of plan assets (Details) - Pension Benefits - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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United States |  |
Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] |  |
Projected benefit obligation | $ 30.1 | $ 496.5
Fair value of plan assets | 11.7 | 473.2
Foreign Plans |  |
Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] |  |
Projected benefit obligation | 296.4 | 261.4
Fair value of plan assets | $ 110.7 | $ 107.8

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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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