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Schedule II Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Valuation Allowance      
Reconciliation of beginning and ending balances of valuation and qualifying accounts      
Balance at the beginning of the period $ 18.4 $ 36.6 $ 21.3
Additions charged to costs and expenses 2.1 0.0 16.9
Additions charged to other accounts 0.0 0.0 0.0
Deductions 0.0 18.2 1.6
Balance at the end of the period 20.5 18.4 36.6
Other Allowances      
Reconciliation of beginning and ending balances of valuation and qualifying accounts      
Balance at the beginning of the period [1] 12.1 8.8 8.4
Additions charged to costs and expenses [1] 0.7 4.7 2.8
Additions charged to other accounts [1] 0.0 0.0 0.0
Deductions [1] 2.2 1.4 2.4
Balance at the end of the period [1] $ 10.6 $ 12.1 $ 8.8
[1] Other Allowances represented reserves on notes received in connection with transfers of our interests in certain Affiliates as well as other receivable amounts, which we considered uncollectible.