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Amounts Recognized in the Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Pension Plan [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Noncurrent assets | $ 26.4 | $ 18.9
Defined benefit pension plan liabilities, current | (6.5) | (6.0)
Defined benefit pension plan, liabilities, noncurrent | (128.6) | (134.7)
Defined benefit plan, amounts recognized in balance sheet | (108.7) | (121.8)
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 | (30.8) | (30.3)
Other postretirement defined benefit plan, liabilities, noncurrent | (506.5) | (583.0)
Other postretirement defined benefit plan, liabilities | $ (537.3) | $ (613.3)

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