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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2020
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis
The following table presents assets measured at fair value on a recurring basis.
(dollars in millions)
 
 
 
 
Fair Value Measurement Using
 
March 31, 2020
   
December 31, 2019
 
Quoted prices in active markets for identical assets (Level 1)
  $
135.6
    $
177.4
 
Significant other observable inputs (Level 2)
   
1.0
     
6.9