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Restructuring Activities - Accrual and Payment Activity (Details) - Multi-year restructuring plan - Employee severance and benefits
$ in Millions
6 Months Ended
Jun. 30, 2020
USD ($)
Restructuring Cost and Reserve [Line Items]  
Balance, December 31, 2019 $ 8.5
Charges and adjustments, net (0.2)
Payments and other (3.7)
Balance, June 30, 2020 $ 4.6