Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 135.0	$ 94.0
Pension and retiree benefits accruals	35.9	41.8
Inventory	7.4	7.1
Depreciation and fixed assets	4.0	6.7
Tax credit carryforwards	8.8	9.8
Other	94.1	63.9
Valuation allowance	(139.5)	(118.5)
Total deferred tax assets	145.7	104.8
Deferred tax liabilities:
Convertible debt discount	209.2	186.2
Inventory	1.0	1.8
Depreciation and fixed assets	28.3	40.0
Intangibles	4.3	9.4
Other	27.6	12.1
Total deferred tax liabilities	270.4	249.5
Net deferred tax assets (liabilities)	$ (124.7)	$ (144.7)