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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward] |  |  |
Unrecognized tax benefits - Beginning of year | $ 84 | $ 96 | $ 124
Increases for tax positions taken during the current year | 2 | 2 | 3
Increases for tax positions taken in prior years | 4 | 8 | 0
Decreases for tax positions taken in prior years | 0 | (10) | (18)
Decreases for settlements | 0 | (3) | (2)
Lapse of the statute of limitations | (5) | (9) | (11)
Unrecognized tax benefits - End of year | $ 85 | $ 84 | $ 96

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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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