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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan, Weighted-Average Interest Crediting Rate |  | 1.00% | 0.75% |
Unrecognized net actuarial losses (gains) |  | $ 379.8 | $ 380.6 | $ 404.8
Reduction in equity |  | $ 282.4 | 285.1 | 304.5
Defined benefit plan, target allocation percentage of assets, near-term benefit payments |  | 30.00% |  |
Defined benefit plan, target allocation percentage of assets, long-term growth |  | 70.00% |  |
Weighted average expected long-term rate of return on plan assets |  | 5.50% |  |
Company contributions |  | $ 15.8 | $ 15.1 | 14.3
Alternative Investments |  |  |  |
Defined benefit plan, target plan asset allocations |  | 5.00% |  |
Equity Securities |  |  |  |
Defined benefit plan, target plan asset allocations |  | 40.00% |  |
Fixed Income Investments |  |  |  |
Defined benefit plan, target plan asset allocations |  | 55.00% |  |
Minimum |  |  |  |
Percentage of joint venture's unrecognized net actuarial losses and unrecognized prior service cost |  | 20.00% |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase |  | 1.75% | 1.75% |
Maximum |  |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase |  | 5.00% | 5.00% |
ENPP |  |  |  |
Minimum age for vesting |  | 50 years |  |
Minimum participation period to qualify for payment |  | 10 years |  |
Minimum service period to vest |  | 5 years |  |
Minimum age to receive benefits |  | 65 years |  |
Period over which retirement benefits are paid |  | 15 years |  |
Period considered when determining retirement benefits |  | 3 years |  |
Minimum service period |  | 20 years |  |
Final years of service |  | 10 years |  |
Defined Benefit Plan, Amortization Period |  | 8 years |  |
Pension and Other Postretirement Benefit Plans [Member] |  |  |  |
Aggregate projected benefit obligation |  | $ 847.3 | $ 946.0 |
Accumulated benefit obligation |  | 798.5 | 891.2 |
Fair value of plan assets |  | 616.0 | 690.8 |
Reduction in equity |  | 378.7 | 379.3 |
Tax effect of benefit plans |  | $ 97.0 | $ 95.0 |
Pension Benefits |  |  |  |
Percentage of fixed income securities consisting of high-yield securities |  | 13.00% | 13.00% |
Percentage of Fixed Income Securities Consisting of Foreign Securities |  | 17.00% | 15.00% |
Unrecognized net actuarial losses (gains) |  | $ 356.7 | $ 360.1 |
Unrecognized prior service cost |  | 19.5 | 12.2 |
Net loss recognized due to settlement |  | $ 0.9 | $ 0.2 | $ 0.4
Weighted average discount rate |  | 2.80% | 2.50% |
Benefit payments in 2018 (less than) |  | $ 46.4 |  |
Benefit payments made to defined benefit pension plans and ENPP |  | 47.4 |  |
Benefits paid |  | $ 45.9 | $ 42.6 |
Weighted average expected long-term rate of return on plan assets |  | 5.40% | 5.80% | 6.80%
Postretirement Benefits |  |  |  |
Unrecognized net actuarial losses (gains) |  | $ (0.6) | $ 3.8 |
Defined Benefit Plan, Amortization Period |  | 12 years |  |
Unrecognized prior service cost |  | $ 3.1 | $ 3.2 |
Weighted average discount rate |  | 5.20% | 4.90% |
Benefit payments in 2018 (less than) |  | $ 1.5 |  |
Benefits paid |  | $ 1.4 | $ 1.6 |
Brazilian Postretirement Benefit Obligation, Defined Benefit [Member] |  |  |  |
Health care cost trend rate assumed |  | 10.80% | 11.00% |
Ultimate health care cost trend rate |  | 5.00% | 5.30% |
Benefit payments in 2018 (less than) |  | $ 0.1 |  |
U.S Based Postretirement Health Care and Life Insurance Benefit Plans |  |  |  |
Health care cost trend rate assumed |  | 6.50% | 6.75% |
Ultimate health care cost trend rate |  | 5.00% | 5.00% |
Benefit payments in 2018 (less than) |  | $ 1.5 |  |
UNITED STATES | Pension Benefits |  |  |  |
Defined Benefit Plan, Amortization Period |  | 16 years |  |
Aggregate projected benefit obligation |  | $ 124.7 | $ 129.6 |
Accumulated benefit obligation |  | 107.8 | 111.5 |
Fair value of plan assets |  | $ 36.8 | $ 36.6 |
Weighted average discount rate |  | 4.35% | 3.70% |
Expected minimum contribution |  | $ 1.6 |  |
Defined benefit plan, target allocation percentage of assets, near-term benefit payments |  | 15.00% |  |
Defined benefit plan, target allocation percentage of assets, long-term growth |  | 85.00% |  |
Defined benefit plan, assumptions used in investment strategy, expected return next fiscal year |  | 5.75% |  |
Weighted average expected long-term rate of return on plan assets | [1] | 6.00% | 6.00% | 6.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase | [2] | 5.00% | 5.00% |
UNITED STATES | Pension Benefits | Large and small cap domestic equity securities |  |  |  |
Defined benefit plan, target plan asset allocations |  | 21.50% |  |
UNITED STATES | Pension Benefits | International equity securities |  |  |  |
Defined benefit plan, target plan asset allocations |  | 8.50% |  |
UNITED STATES | Pension Benefits | Fixed Income Securities |  |  |  |
Defined benefit plan, target plan asset allocations |  | 55.00% |  |
UNITED STATES | Pension Benefits | Alternative Investments |  |  |  |
Defined benefit plan, target plan asset allocations |  | 10.00% |  |
UNITED STATES | Pension Benefits | Defined Benefit Plan, Cash [Member] |  |  |  |
Defined benefit plan, target plan asset allocations |  | 5.00% |  |
UNITED STATES | Postretirement Benefits |  |  |  |
Unrecognized net actuarial losses (gains) |  | $ 0.3 |  |
Foreign Plan [Member] | U.K. Pension Plans, Defined Benefit |  |  |  |
Expected minimum contribution |  | $ 19.9 |  |
Weighted average expected long-term rate of return on plan assets |  | 4.75% |  |
Foreign Plan [Member] | Pension Benefits |  |  |  |
Defined Benefit Plan, Amortization Period |  | 19 years |  |
Expected minimum contribution |  | $ 28.9 |  |
Defined benefit plan, historical average return on asset mix |  | 5.20% |  |
Corporate Joint Venture | GIMA |  |  |  |
Reduction in equity |  | $ (1.1) | $ (1.3) |
Tax effect of benefit plans |  | $ 0.4 | $ 0.5 |
Percentage of joint venture's unrecognized net actuarial losses and unrecognized prior service cost |  | 50.00% | 50.00% |
Net loss recognized due to settlement |  | $ 0.1 | $ 0.1 |
BRAZIL | Postretirement Benefits |  |  |  |
Defined Benefit Plan, Accumulated Benefit Obligation |  | $ 0.6 |  |
[1] | Applicable for U.S. funded, qualified plans.
[2] | Applicable for U.S. unfunded, nonqualified plan.

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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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