Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Accrued postretirement benefits cost	$ 130.1	$ 185.0
Accrued pension cost	0	137.1
Inventory	4.0	15.4
Other employee benefit accruals	20.3	26.6
Tax loss and credit carryforwards	166.7	145.1
Other, net	52.6	59.9
Valuation allowances	(195.9)	(183.9)
Total deferred tax assets	177.8	385.2
Pension assets	(33.4)	0
Deferred tax liabilities - principally depreciation and amortization	(239.0)	(231.9)
Net deferred tax assets	$ (94.6)	$ 153.3