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Fair Value Of Assets And Liabilities (Tables)
12 Months Ended
Dec. 31, 2017
Fair Value Disclosures [Abstract]  
Schedule of Fair Value Measurements on a Recurring Basis
The following tables present our assets measured at fair value on a recurring basis:
 
Level 1
(in millions)
December 31, 2017
 
December 31, 2016
Cash equivalents and restricted cash
$
31.2

 
$
34.3