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Income Taxes (Textuals) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Tax Disclosure [Abstract]          
Income tax provision $ 25   $ 4 $ 52 $ 8
Effective tax rate 18.50%   10.90% 20.70% 10.40%
Assessment for tax, penalties and interest   $ 80