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Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward] |  |  |
Balance at beginning of period | $ 585 | $ 520 | $ 634
Additions to current year tax positions | 108 | 45 | 12
Additions to prior years' tax positions | 28 | 72 | 14
Reductions to prior years' tax positions | (109) | (15) | (98)
Reductions in tax positions due to lapse of statutory limitations | (7) | (19) | (20)
Settlements | (8) | (18) | (10)
Other | (11) | 0 | (12)
Balance at end of period | 586 | 585 | $ 520
Unrecognized tax benefit that would favorably affect effective tax rate | $ 415 | $ 386 |

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 217 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-217 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10B -Publisher FASB -URI https://asc.fasb.org/1943274/2147482525/740-10-45-10B + Details
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