Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit) [Abstract]
Deferred Tax Liabilities, Net		$ (13.4)
Deferred Tax Assets:
Net operating loss carryforwards	94.9	181.6
Sales incentive discounts	55.8	44.7
Inventory valuation reserves	27.0	24.5
Pensions and postretirement health care benefits	102.4	93.7
Warranty and other reserves	138.1	127.5
Research and development benefits	21.0	0
Other	38.8	26.2
Total gross deferred tax assets	478.0	498.2
Valuation allowance	(74.5)	(145.8)
Total net deferred tax assets	403.5	352.4
Deferred Tax Liabilities:
Tax over book depreciation and amortization	341.0	338.1
Other	21.3	27.7
Total deferred tax liabilities	362.3	365.8
Net deferred tax assets (liabilities)	41.2	(13.4)
Amounts recognized in Consolidated Balance Sheets:
Deferred tax assets - current	243.5	142.7
Deferred tax assets - noncurrent	40.0	37.6
Other current liabilities	0.4	(1.4)
Other noncurrent liabilities	(242.7)	(192.3)
Net deferred tax assets (liabilities)	$ 41.2	$ (13.4)