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Investments in and Advances to Nonconsolidated Affiliates (Tables)
3 Months Ended
Mar. 31, 2019
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]  
Schedule of Combined Results of Operations of Equity Method Affiliates
The following summarizes the combined results of operations of our equity method affiliates (on a 100% basis, in millions):
 
Three Months Ended March 31,
 
2019
 
2018
Net operating revenues
$
11.6

 
$
11.0

Operating expenses
(6.8
)
 
(7.6
)
Income from continuing operations, net of tax
4.9

 
3.4

Net income
4.9

 
3.4