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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]  
Reconciliation of Liability for Uncertain Tax Positions
The following is a reconciliation of the liability for uncertain tax positions (in millions):
Balance at December 31, 2019$109.1 
Additions for tax positions15.3 
Reductions for tax positions(29.3)
Balance at September 30, 2020$95.1