Summary of Significant Accounting Policies (Adjustments in Consolidated Statement of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Accounting Policies [Abstract]
Net income including noncontrolling interest	$ 10.0	[1]	$ 55.7	[1]	$ 63.6	[1]
Deferred income taxes	10.6	[1]	7.4	[1]	20.7	[1]
Increase in inventories	105.9	[1]	(180.1)	[1]	(169.8)	[1]
Net cash flows of operating activities	$ 272.6	[1]	$ 97.8	[1]	$ 97.8	[1]

[1] See Note 23 - Restatement of Consolidated Financial Statements