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Schedule of Pension Plans with Accumulated Benefit Obligation and Projected Benefit Obligation in Excess of Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
UNITED STATES
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 60.8	$ 55.3
Accumulated benefit obligation	58.5	53.2
Fair value of plan assets	0.0
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Projected benefit obligation	51.0	44.0
Accumulated benefit obligation	46.5	39.9
Fair value of plan assets	$ 1.9	$ 1.6

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

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-Publisher FASB
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