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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |  |
Income tax expense (benefit) allocated directly to equity | $ (13) | $ (2) | $ (37)
Unrecognized tax benefits that would impact effective tax rate | 161 |  |
Cash outflow from unrecognized tax benefit that would impact effective tax rate | 170 |  |
Interest (income) expense recognized related to unrecognized tax benefits | 0 | 1 | 11
Accrued interest related to unrecognized tax benefits | $ 23 | $ 27 | $ 28
Minimum |  |  |
Income Taxes [Line Items] |  |  |
Statue of limitations on foreign jurisdictions for tax audits | 3 years |  |
Maximum |  |  |
Income Taxes [Line Items] |  |  |
Statue of limitations on foreign jurisdictions for tax audits | 6 years |  |

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- Definition The sum of the tax effects of all items occurring during the period that have been charged or credited directly to other comprehensive income or to related components of shareholders' equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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