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Defined Contribution and Defined Benefit Retirement - Schedule of Plans for which Accumulated Benefit Obligations Exceeds Plan Assets (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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U.S. |  |
Plans for which the ABO exceeds plan assets: |  |
Projected benefit obligations | $ 63.2 | $ 60.6
Accumulated benefit obligations | 63.2 | 60.6
Fair value of plan assets | 53.3 | 48.4
Non U.S. |  |
Plans for which the ABO exceeds plan assets: |  |
Projected benefit obligations | 800.2 | 685.4
Accumulated benefit obligations | 777.4 | 663.3
Fair value of plan assets | $ 430.8 | $ 381.7

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