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Income Taxes update (Tables)
6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
Summary of Valuation Allowance
The following chart provides a reconciliation of the beginning and ending valuation allowances for the period ended June 30, 2021:
(in millions)
Balance at beginning of year$2,817 
Additions to valuation allowance charged to income tax expense233 
Reductions to valuation allowance credited to income tax benefit(49)
Foreign currency translation(4)
Balance at end of period$2,997