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Income Tax (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits |  |  |
Balance at January 1, | $ 163 | $ 272 | $ 256
Additions for tax positions of prior years | 42 | 19 | 16
Reductions for tax positions of prior years (1) | (93) | (112) | (1)
Additions for tax positions of current year | 22 | 5 | 12
Reductions for tax positions of current year | (3) | (18) | 0
Settlements with tax authorities | (2) | (3) | (1)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 0 | 0 | (10)
Balance at December 31, | 129 | 163 | 272
Unrecognized tax benefits that, if recognized, would impact the effective rate | $ 80 | $ 103 | $ 203

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