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Schedule II Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Valuation Allowance      
Reconciliation of beginning and ending balances of valuation and qualifying accounts      
Balance Beginning of Period $ 20.5 $ 18.4 $ 36.6
Additions Charged to Costs and Expenses 1.3 2.1 0.0
Additions Charged to Other Accounts 0.3 0.0 0.0
Deductions 0.0 0.0 18.2
Balance End of Period 22.1 20.5 18.4
Other Allowances      
Reconciliation of beginning and ending balances of valuation and qualifying accounts      
Balance Beginning of Period [1] 10.6 12.1 8.8
Additions Charged to Costs and Expenses [1] 5.0 0.7 4.7
Additions Charged to Other Accounts [1] 0.0 0.0 0.0
Deductions [1] 5.3 2.2 1.4
Balance End of Period [1] $ 10.3 $ 10.6 $ 12.1
[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.