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Income Taxes - 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, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized tax benefits - Beginning of year | $ 124 | $ 171 | $ 145
Increases for tax positions taken during the current year | 3 | 16 | 9
Increases for tax positions taken in prior years | 0 | 5 | 53
Decreases for tax positions taken in prior years | (18) | (41) | (23)
Decreases for settlements | (2) | (1) | (2)
Lapse of the statute of limitations | (11) | (26) | (11)
Unrecognized tax benefits - End of year | $ 96 | $ 124 | $ 171

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI https://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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