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COVID-19 Repositioning Costs (Tables)
6 Months Ended
Jun. 30, 2021
COVID-19 Repositioning Costs [Abstract]  
COVID-19 Repositioning Liabilities At June 30, 2021 the remaining liability for the COVID-19 repositioning costs was (in millions):
January 1, 2021$83.8 
Payments(23.4)
June 30, 2021$60.4