XML 42 R31.htm IDEA: XBRL DOCUMENT v3.21.2
Income Taxes (Tables)
9 Months Ended
Sep. 30, 2021
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, 2020$100.7 
Additions for tax positions56.7 
Reductions for tax positions(0.8)
Balance at September 30, 2021$156.6