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Investments In and Advances to Nonconsolidated Affiliates - Table 1 (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Investments in and Advances to Affiliates, Schedule of Investments [Abstract] |  |
Net operating revenues | $ 11.0 | $ 10.8
Operating expenses | (7.6) | (6.3)
Income from continuing operations, net of tax | 3.4 | 4.4
Net income | $ 3.4 | $ 4.4

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