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Pension and Postretirement Benefit Obligation (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Benefit Obligation [Roll Forward] |  |  |
Domestic Pension Plan Discount Rate | 2.60% | 3.35% |
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | $ 508.6 |  |
Fair Value of Plan Assets (Period End) | $ 562.5 | $ 508.6 |
Pension plans with underfunded or unfunded accumulated benefit obligation |  |  |
Foreign Pension Plan Discount Rate | 1.35% | 1.84% |
Domestic Plan [Member] |  |  |
Benefit Obligation [Roll Forward] |  |  |
Benefit obligation (period start) | $ 116.9 | $ 115.4 |
Service cost | 0.0 | 0.0 | $ 0.0
Interest cost | 3.7 | 4.8 | 4.5
Benefits Paid | (10.1) | (9.2) |
Plan participant contributions | 0.0 | 0.0 |
Actuarial losses (gains) | 6.3 | 5.9 |
Settlements and curtailments | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Other | 0.0 | 0.0 |
Benefit Obligation (Period End) | 116.8 | 116.9 | 115.4
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | 99.1 | 89.8 |
Actual return on plan assets | 10.6 | 16.1 |
Plan participant contributions | 0.0 | 0.0 |
Employer contributions | 1.3 | 2.4 |
Benefits paid | (10.1) | (9.2) |
Settlements | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Fair Value of Plan Assets (Period End) | 100.9 | 99.1 | $ 89.8
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (15.9) | (17.8) |
Amounts Recognized in Consolidated Balance Sheets |  |  |
Non-current asset | 0.0 | 0.0 |
Current liability | 0.0 | 0.0 |
Non-current liability | (15.9) | (17.8) |
Net liability recognized | (15.9) | (17.8) |
Accumulated benefit obligation | 116.8 | 116.9 |
Amounts recognized in Accumulated Other Comprehensive Loss, net |  |  |
Net actuarial loss | 53.9 | 54.2 |
Prior service cost (credit) | 0.0 | 0.0 |
Total amount recognized | 53.9 | 54.2 |
Pension plans with underfunded or unfunded accumulated benefit obligation |  |  |
Aggregate projected benefit obligation | 116.8 | 116.9 |
Aggregate accumulated benefit obligation | 116.8 | 116.9 |
Aggregate fair value of plan assets | $ 100.9 | $ 99.1 |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 2.60% | 3.35% | 4.35%
Foreign Plan [Member] |  |  |
Benefit Obligation [Roll Forward] |  |  |
Benefit obligation (period start) | $ 541.2 | $ 496.0 |
Service cost | 4.9 | 4.8 | $ 5.4
Interest cost | 9.4 | 12.4 | 13.1
Benefits Paid | (22.9) | (27.8) |
Plan participant contributions | 0.0 | 0.0 |
Actuarial losses (gains) | 54.3 | 42.7 |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | (4.9) | (0.7) |
Foreign currency effect | 23.3 | 13.8 |
Other | 0.6 | 0.0 |
Benefit Obligation (Period End) | 605.9 | 541.2 | 496.0
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | 409.5 | 363.9 |
Actual return on plan assets | 45.7 | 42.0 |
Plan participant contributions | 0.0 | 0.0 |
Employer contributions | 18.4 | 18.0 |
Benefits paid | (22.9) | (27.8) |
Settlements | (4.9) | 0.0 |
Foreign currency effect | 15.8 | 13.4 |
Fair Value of Plan Assets (Period End) | 461.6 | 409.5 | $ 363.9
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (144.3) | (131.7) |
Amounts Recognized in Consolidated Balance Sheets |  |  |
Non-current asset | 10.9 | 10.1 |
Current liability | (7.4) | (5.8) |
Non-current liability | (147.8) | (136.0) |
Net liability recognized | (144.3) | (131.7) |
Accumulated benefit obligation | 603.3 | 538.6 |
Amounts recognized in Accumulated Other Comprehensive Loss, net |  |  |
Net actuarial loss | 213.3 | 183.2 |
Prior service cost (credit) | 1.1 | 1.1 |
Total amount recognized | 214.4 | 184.3 |
Pension plans with underfunded or unfunded accumulated benefit obligation |  |  |
Aggregate projected benefit obligation | 600.8 | 534.6 |
Aggregate accumulated benefit obligation | 600.1 | 533.5 |
Aggregate fair value of plan assets | $ 445.6 | $ 392.7 |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 1.35% | 1.84% | 2.61%
Other Postretirement Benefits Plan [Member] |  |  |
Benefit Obligation [Roll Forward] |  |  |
Benefit obligation (period start) | $ 27.2 | $ 27.7 |
Service cost | 0.0 | 0.0 | $ 0.0
Interest cost | 0.8 | 1.2 | 1.1
Benefits Paid | (5.2) | (5.4) |
Plan participant contributions | 2.1 | 2.0 |
Actuarial losses (gains) | 0.9 | 1.7 |
Settlements and curtailments | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Other | 0.0 | 0.0 |
Benefit Obligation (Period End) | 25.8 | 27.2 | 27.7
Fair Value of Plan Assets [Roll Forward] |  |  |
Fair Value of Plan Assets (Period Start) | 0.0 | 0.0 |
Actual return on plan assets | 0.0 | 0.0 |
Plan participant contributions | 2.1 | 2.0 |
Employer contributions | 3.1 | 3.4 |
Benefits paid | (5.2) | (5.4) |
Settlements | 0.0 | 0.0 |
Foreign currency effect | 0.0 | 0.0 |
Fair Value of Plan Assets (Period End) | 0.0 | 0.0 | $ 0.0
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (25.8) | (27.2) |
Amounts Recognized in Consolidated Balance Sheets |  |  |
Non-current asset | 0.0 | 0.0 |
Current liability | (2.5) | (2.7) |
Non-current liability | (23.3) | (24.5) |
Net liability recognized | (25.8) | (27.2) |
Amounts recognized in Accumulated Other Comprehensive Loss, net |  |  |
Net actuarial loss | 5.4 | 4.7 |
Prior service cost (credit) | 0.0 | (0.1) |
Total amount recognized | $ 5.4 | $ 4.6 |
Pension plans with underfunded or unfunded accumulated benefit obligation |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 2.50% | 3.25% | 4.30%

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- Definition Amount of plan asset for defined benefit plan with accumulated 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 (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: 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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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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