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Retirement Benefits (Details 6) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Pension Benefits [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Noncurrent assets | $ 4.8 | $ 9.2
Current liabilities | (5.1) | (4.7)
Noncurrent liabilities | (731.5) | (730.0)
Total amount recognized | (731.8) | (725.5)
Other Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Noncurrent assets | 0.0 | 0.0
Current liabilities | (32.7) | (40.6)
Noncurrent liabilities | (312.5) | (318.4)
Total amount recognized | $ (345.2) | $ (359.0)

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