Other Assets and Other Liabilities (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Components of Other Liabilities reported on the consolidated balance sheets
Accrued operating lease expense	$ 56.3	$ 67.3
Pension and other post-retirement liabilities	112.8	92.3
Deferred gains on sale-leasebacks	47.2	34.9
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3.2	18.8
Environmental reserves	15.6	16.7
Deferred income	11.8	15.4
Derivatives	3.4	2.4
Other Liabilities, Noncurrent	32.6	33.8
Total	$ 282.9	$ 281.6