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Defined Contribution and Defined Benefit Retirement - Schedule of Funded Status (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Amounts recognized in the Consolidated Balance Sheets: |  |  |
Pension asset | $ 8.4 | $ 7.4 |
Noncurrent | (379.0) | (315.6) |
Defined Benefit Pension Plans |  |  |
Change in plan assets: |  |  |
Fair value at beginning of the year | 498.4 |  |
Fair value at end of the year | 548.2 | 498.4 |
Defined Benefit Pension Plans | U.S. |  |  |
Change in benefit obligation: |  |  |
Balance at beginning of the year | 60.6 | 57.6 |
Interest cost | 1.9 | 2.3 | $ 2.2
Actuarial losses | 5.0 | 4.9 |
Benefits paid | (4.3) | (4.2) |
Balance at end of the year | 63.2 | 60.6 | 57.6
Change in plan assets: |  |  |
Fair value at beginning of the year | 48.4 | 43.2 |
Actual return on plan assets | 6.8 | 5.5 |
Employer contributions | 2.4 | 3.9 |
Benefits paid | (4.3) | (4.2) |
Fair value at end of the year | 53.3 | 48.4 | 43.2
Funded status | (9.9) | (12.2) |
Amounts recognized in the Consolidated Balance Sheets: |  |  |
Current | (0.2) | (0.3) |
Noncurrent | (9.7) | (11.9) |
Total recognized in balance sheet | (9.9) | (12.2) |
Accumulated other comprehensive (income) loss: |  |  |
Accumulated other comprehensive loss Actuarial loss | 36.7 | 38.5 |
Total amount recognized in balance sheet and AOCI | 26.8 | 26.3 |
Accumulated benefit obligations ("ABO") | $ 63.2 | $ 60.6 |
Defined Benefit Plan, Funding Status [Extensible List] | us-gaap:FundedPlanMember | us-gaap:FundedPlanMember |
Defined Benefit Pension Plans | Non U.S. |  |  |
Change in benefit obligation: |  |  |
Balance at beginning of the year | $ 746.4 | $ 667.2 |
Service cost | 13.3 | 12.8 | 11.6
Interest cost | 10.1 | 13.5 | 13.8
Participants' contributions | 1.9 | 1.6 |
Actuarial losses | 47.5 | 82.0 |
Plan settlement |  | (1.0) |
Change in currency exchange rates | 58.8 | (6.6) |
Benefits paid | (22.2) | (23.1) |
Balance at end of the year | 855.8 | 746.4 | 667.2
Change in plan assets: |  |  |
Fair value at beginning of the year | 450.0 | 410.7 |
Actual return on plan assets | 19.2 | 47.0 |
Employer contributions | 16.0 | 15.5 |
Participants' contributions | 1.9 | 1.6 |
Change in currency exchange rates | 29.9 | (1.7) |
Benefits paid | (22.2) | (23.1) |
Fair value at end of the year | 494.8 | 450.0 | $ 410.7
Funded status | (361.0) | (296.4) |
Amounts recognized in the Consolidated Balance Sheets: |  |  |
Pension asset | 8.4 | 7.4 |
Noncurrent | (369.4) | (303.8) |
Total recognized in balance sheet | (361.0) | (296.4) |
Accumulated other comprehensive (income) loss: |  |  |
Accumulated other comprehensive loss Actuarial loss | 307.0 | 286.8 |
Accumulated other comprehensive (income) loss - Prior service credit | 0.7 | 1.0 |
Accumulated other comprehensive loss, Total | 307.7 | 287.8 |
Total amount recognized in balance sheet and AOCI | (53.3) | (8.6) |
Accumulated benefit obligations ("ABO") | $ 838.2 | $ 720.3 |
Defined Benefit Plan, Funding Status [Extensible List] | us-gaap:FundedPlanMember | us-gaap:FundedPlanMember |

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