Guarantees and Indemnifications (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2012
Product Liability Contingency [Line Items]
Product Warranty Accrual, Period Increase (Decrease)	$ (1.0)	$ 0		$ (1.0)	$ 0
Guarentee to joint venture bank lender		3.4			3.4
Prior Agreement to contribute to JV		3.0			3.0
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance			30.6	30.3	29.5	26.5
Accrued to expense	1.4	9.8	3.8	1.9	14.7
Payments made	(4.5)	(5.2)		(8.8)	(9.0)
Total warranty reserves	23.4	35.2		23.4	35.2	26.5
Current portion of warranty reserves	(12.0)	(12.0)		(12.0)	(12.0)
Long-term portion of warranty reserves	11.4	23.2		11.4	23.2
Net Amount at Risk by Product and Guarantee, Separate Account Value		2.2			2.2
Damages from Product Defects [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Accrued to expense		$ 8.2