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Restricted Cash (Tables)
6 Months Ended
Jun. 30, 2020
Restricted Cash [Abstract]  
Restricted Cash
As of
(in millions)June 30,
2020
June 30,
2019
December 31, 2019
Cash and cash equivalents$647.8  $474.8  $59.1  
Restricted cash1.8  1.4  1.8  
Cash, cash equivalents and restricted cash$649.6  $476.2  $60.9