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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Income tax expense (benefit) $ (43.9) $ 6.0 $ (40.6) $ 3.0  
Effective income tax rate, continuing operations 17.10% 10.20% 5.40% 3.10%  
Tax Adjustments, Settlements, and Unusual Provisions $ 18.5        
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities 25.3        
Unrecognized tax benefit liability, including penalties and accrued interest 23.1   $ 23.1   $ 52.6
Settlement with Taxing Authority [Member]          
Other Tax Expense (Benefit) (6.8)        
CARES Act [Member]          
Other Tax Expense (Benefit) (7.0)   $ (7.5)    
Transition Tax [Member]          
Other Tax Expense (Benefit)       $ (9.3)  
UNITED STATES          
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 36.0