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v3.23.3

Compensation Related Costs, Postemployment Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |
Service cost | $ 1.2 | $ 2.0 | $ 3.6 | $ 6.3 |
Interest cost | 7.5 | 4.3 | 16.4 | 13.1 |
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 7.4 | 7.5 | 16.4 | 23.0 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | 0.3 | 0.2 | 0.9 | 0.6 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 1.0 | (1.4) | 2.7 | (4.2) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 0.8 |  | 7.5 |  |
WESCODeferredCompensationPlanMember |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |
Deferred Compensation Liability, Classified, Noncurrent | 25.1 |  | 25.1 |  | $ 20.3
Pension Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Other Nonoperating Gains (Losses) | (0.2) | (3.4) | (0.9) | (10.5) |
UNITED STATES |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |
Service cost | 0.0 | 0.0 | 0.0 | 0.0 |
Interest cost | 4.6 | 2.1 | 7.8 | 6.3 |
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 4.3 | 3.5 | 7.3 | 10.5 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | 0.0 | 0.0 | 0.0 | 0.0 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 0.3 | (1.4) | 0.5 | (4.2) |
Foreign Plan |  |  |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |  |  |
Service cost | 1.2 | 2.0 | 3.6 | 6.3 |
Interest cost | 2.9 | 2.2 | 8.6 | 6.8 |
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 3.1 | 4.0 | 9.1 | 12.5 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | 0.3 | 0.2 | 0.9 | 0.6 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 0.7 | $ 0.0 | $ 2.2 | $ 0.0 |

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