Pension And Other Benefit Plans - Changes in Fair Value of Plan Assets (Details) - Defined benefit pension plans - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Fair Value, Plan Assets Measured on Recurring Basis [Roll Forward]
Fair value of plan assets at beginning of year	$ 104.1	$ 105.4
Fair value of plan assets at end of year	80.6	104.1
Significant Unobservable Inputs (Level 3)
Fair Value, Plan Assets Measured on Recurring Basis [Roll Forward]
Fair value of plan assets at beginning of year	77.2	80.7
Return on Plan Assets	(0.6)	10.0
Net Purchases/(Settlements)	(26.5)	(13.5)
Transfers Into/(Out of) Level 3	0.0	0.0
Fair value of plan assets at end of year	$ 50.1	$ 77.2

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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- Definition

Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment.

+ References

+ Details

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Details

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