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Financial Instruments, Hedging Activities and Fair Value Measurements - Schedule of Liability Activity (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 0.0 $ 0.0
Activity   0.0
Business acquisition 7.3  
Ending balance $ 7.3 $ 0.0