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Investments In and Advances to Nonconsolidated Affiliates - Table 1 (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]        
Document Period End Date     Jun. 30, 2019  
Net operating revenues $ 10.5 $ 10.5 $ 22.1 $ 21.5
Operating expenses (6.8) (5.6) (13.5) (13.2)
Income from continuing operations, net of tax 3.7 4.9 8.6 8.3
Net income $ 3.7 $ 4.9 $ 8.6 $ 8.3