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Employee Benefit Plans - Fair Values of Pension Plan Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / item	Dec. 31, 2021 USD ($)
Employee benefit plans
Fair value of plan assets	$ 292.7	$ 454.0
Fixed income common trust funds
Employee benefit plans
Fair value of plan assets	196.4	291.2
Non-U.S. Government securities
Employee benefit plans
Fair value of plan assets	0.3	0.3
U.S. Government securities
Employee benefit plans
Fair value of plan assets	13.9	25.8
Global equity common trust funds
Employee benefit plans
Fair value of plan assets	38.0	58.0
Commingled global fund allocation
Employee benefit plans
Fair value of plan assets	37.2	67.4
Short-term investments
Employee benefit plans
Fair value of plan assets	$ 6.0	10.4
Value of short-term investments (in dollars per unit) | $ / item	1.00
Other
Employee benefit plans
Fair value of plan assets	$ 0.9	0.9
Quoted Prices in Active Markets for Identical Assets (Level 1)
Employee benefit plans
Fair value of plan assets	6.0	10.4
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income common trust funds
Employee benefit plans
Fair value of plan assets	0.0	0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. Government securities
Employee benefit plans
Fair value of plan assets	0.0	0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Government securities
Employee benefit plans
Fair value of plan assets	0.0	0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Global equity common trust funds
Employee benefit plans
Fair value of plan assets	0.0	0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commingled global fund allocation
Employee benefit plans
Fair value of plan assets	0.0	0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term investments
Employee benefit plans
Fair value of plan assets	6.0	10.4
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Observable Inputs (Level 2)
Employee benefit plans
Fair value of plan assets	285.8	442.7
Significant Observable Inputs (Level 2) | Fixed income common trust funds
Employee benefit plans
Fair value of plan assets	196.4	291.2
Significant Observable Inputs (Level 2) | Non-U.S. Government securities
Employee benefit plans
Fair value of plan assets	0.3	0.3
Significant Observable Inputs (Level 2) | U.S. Government securities
Employee benefit plans
Fair value of plan assets	13.9	25.8
Significant Observable Inputs (Level 2) | Global equity common trust funds
Employee benefit plans
Fair value of plan assets	38.0	58.0
Significant Observable Inputs (Level 2) | Commingled global fund allocation
Employee benefit plans
Fair value of plan assets	37.2	67.4
Significant Observable Inputs (Level 2) | Short-term investments
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Observable Inputs (Level 2) | Other
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3)
Employee benefit plans
Fair value of plan assets	0.9	0.9
Significant Unobservable Inputs (Level 3) | Fixed income common trust funds
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3) | Non-U.S. Government securities
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3) | U.S. Government securities
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3) | Global equity common trust funds
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3) | Commingled global fund allocation
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3) | Short-term investments
Employee benefit plans
Fair value of plan assets	0.0	0.0
Significant Unobservable Inputs (Level 3) | Other
Employee benefit plans
Fair value of plan assets	$ 0.9	$ 0.9

X

- Definition

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+ References

No definition available.

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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
-Topic 715
-SubTopic 20
-Section 50
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