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v3.20.4

Net Periodic Cost (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan, Net Periodic Benefit Cost |  |  |
Settlement and curtailment | $ 0.1 | $ (0.0) | $ 1.0
Domestic Plan [Member] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost |  |  |
Service cost | 0.0 | 0.0 | 0.0
Interest cost | 3.7 | 4.8 | 4.5
Expected return on plan assets | (5.7) | (5.9) | (6.6)
Settlement and curtailment | 0.0 | 0.0 | 0.0
Amortization of: |  |  |
Prior service cost (credit) | 0.0 | 0.0 | 0.0
Net actuarial losses | 1.7 | 1.9 | 1.6
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ (0.3) | $ 0.8 | $ (0.5)
Discount rate | 3.35% | 4.35% | 3.70%
Expected return on plan assets | 6.00% | 7.00% | 7.00%
Interest crediting rate | 5.10% | 5.10% | 5.10%
Discount rate | 2.60% | 3.35% | 4.35%
Interest crediting rate | 5.10% | 5.10% | 5.10%
Foreign Plan [Member] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost |  |  |
Service cost | $ 4.9 | $ 4.8 | $ 5.4
Interest cost | 9.4 | 12.4 | 13.1
Expected return on plan assets | (18.8) | (17.4) | (18.8)
Settlement and curtailment | (0.1) | 0.0 | (1.0)
Amortization of: |  |  |
Prior service cost (credit) | 0.1 | 0.1 | 0.1
Net actuarial losses | 5.4 | 4.8 | 5.9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 0.9 | $ 4.7 | $ 4.7
Discount rate | 1.84% | 2.61% | 2.36%
Rate of compensation increase | 2.51% | 2.58% | 2.37%
Expected return on plan assets | 4.70% | 4.76% | 4.70%
Interest crediting rate | 1.37% | 1.44% | 1.31%
Discount rate | 1.35% | 1.84% | 2.61%
Rate of compensation increase | 2.47% | 2.51% | 2.58%
Interest crediting rate | 1.50% | 1.37% | 1.44%
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost |  |  |
Service cost | $ 0.0 | $ 0.0 | $ 0.0
Interest cost | 0.8 | 1.2 | 1.1
Expected return on plan assets | 0.0 | 0.0 | 0.0
Settlement and curtailment | 0.0 | 0.0 | 0.0
Amortization of: |  |  |
Prior service cost (credit) | 0.0 | (0.2) | (0.2)
Net actuarial losses | 0.2 | 0.1 | 0.1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 1.0 | $ 1.1 | $ 1.0
Discount rate | 3.25% | 4.30% | 3.65%
Discount rate | 2.50% | 3.25% | 4.30%
Health care cost trend rate assumed for next year | 6.75% | 7.00% | 6.25%
Year ultimate rate is reached | 2028 | 2028 | 2024
Ultimate rate | 5.00% | 5.00% | 5.00%

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