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Employee Benefit Plans - Amounts Recognized in the Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Pension Plan [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Noncurrent assets | $ 21.2 | $ 26.4
Defined benefit pension plan liabilities, current | (6.6) | (6.5)
Defined benefit pension plan, liabilities, noncurrent | (118.2) | (128.6)
Defined benefit plan, amounts recognized in balance sheet | (103.6) | (108.7)
Other Postretirement Benefits Plan [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Noncurrent assets | 0.0 | 0.0
Postemployment benefits liability, current | (29.1) | (30.8)
Other postretirement defined benefit plan, liabilities, noncurrent | (520.0) | (506.5)
Other postretirement defined benefit plan, liabilities | $ (549.1) | $ (537.3)

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