Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 7.0	$ 3.3	$ 0
Valuation Allowances and Reserves, Charged to Cost and Expense	1.1	3.7	3.3
Valuation Allowances and Reserves, Adjustments	(2.0)	0	0
Valuation Allowances and Reserves, Balance	6.1	7.0	3.3
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	6.3	8.3	6.2
Valuation Allowances and Reserves, Charged to Cost and Expense	1.5	0.2	0.4
Valuation Allowances and Reserves, Deductions	(0.4)	0	0
Valuation Allowances and Reserves, Adjustments	0.2	(2.2)	1.7
Valuation Allowances and Reserves, Balance	$ 7.6	$ 6.3	$ 8.3