Other Assets and Other Liabilities (Details 1) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Components of Other Liabilities reported on the consolidated balance sheets
Accrued operating lease expense	$ 8.3	$ 22.2
Pension and other post-retirement liabilities	84.4	82.3
Deferred gains on sale-leasebacks	55.9	54.0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	0.0	2.8
Environmental reserves	13.1	14.9
Deferred income	3.1	3.8
Derivatives	39.3	0.1
Other Liabilities, Noncurrent	29.1	42.0
Total	$ 233.2	$ 222.1