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LEASES. (Tables)
12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Schedule of future minimum lease payments Our future undiscounted cash flows related to our operating leases and the reconciliation to the operating lease liability as of December 31, 2020, are as follows:
(in millions)2020
2021$35.3 
202232.8 
202329.9 
202442.9 
202514.8 
Thereafter12.6 
Total future undiscounted cash flows168.3 
Less: imputed interest to be recognized in lease expense(14.2)
Operating lease liabilities, as reported$154.1