Other Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Roll Forward]
Beginning Balance	$ 2.9		$ 2.9
Goodwill, Translation and Purchase Accounting Adjustments	0.1
Ending Balance	3.0		2.9
Intangible assets
Total intangible assets	39.8	38.5
Intangible assets, net	10.1	13.9
Deferred Financing Costs	76.4	64.0
Less: Accumulated amortization-deferred financing costs	(49.6)	(35.0)
Deferred financing costs, net	26.8	29.0
Fair value of derivative instruments		0.6
Goodwill - Europe	3.0		2.9
Equity in net assets of affiliates	5.1	4.5
Customer Supply Agreement	39.9	39.8
Other	6.1	5.7
Total	91.0	96.4
Patents [Member]
Intangible assets
Total intangible assets	2.0	2.0
Accumulated amortization	(1.2)	(1.1)
Favorable Leasehold Interests [Member]
Intangible assets
Total intangible assets	9.7	9.7
Accumulated amortization	(4.8)	(4.2)
Customer relationships [Member]
Intangible assets
Total intangible assets	28.1	26.8
Accumulated amortization	$ (23.7)	$ (19.3)