Employee Benefits - Information for Pension Plans with ABO in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Compensation And Retirement Disclosure [Abstract]
ABO Exceeds Assets	$ 482.9	$ 960.9
Assets Exceed ABO	659.4	167.9
Projected benefit obligation	1,142.3	1,128.8
ABO Exceeds Assets	482.9	960.9
Assets Exceed ABO	659.4	167.9
Accumulated benefit obligation	1,142.3	1,128.8
ABO Exceeds Assets	468.1	726.0
Assets Exceed ABO	722.6	174.0
Fair value of plan assets	$ 1,190.7	$ 900.0

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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
-Name Accounting Standards Codification
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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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

+ References

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