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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
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |
Unrecognized tax benefits at beginning of year | $ 1,375 | $ 1,474
Increase in tax positions of the current year netted against deferred tax assets | 0 | 1
Increase in tax positions of prior periods netted against deferred tax assets | 0 | 0
Decrease in tax positions of the current year netted against deferred tax assets | 0 | (101)
Decrease in tax positions of prior periods netted against deferred tax assets | (661) | (1)
Increase in tax positions taken in the current year | 634 | 4
(Decrease) increase in tax positions taken in the prior year | (3) |
(Decrease) increase in tax positions taken in the prior year |  | 2
Decrease due to payments/settlements | 0 | (3)
Decrease from the lapse of statute of limitations | 0 | (1)
Decrease related to divestitures of businesses | (27) | 0
Unrecognized tax benefits at end of year | $ 1,318 | $ 1,375

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- Definition Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Netted Against Deferred Tax Assets + References No definition available. + Details
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- Definition Unrecognized tax benefits, increase from prior years positions netted against DTA + References No definition available. + Details
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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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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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