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Income Tax (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Operating Loss Carryforwards [Line Items] |  |  |  |
Proceeds from Income Tax Refunds | $ 13 | $ 3 | $ 20 |
Cash paid for income taxes | 311 | 131 | 388 |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 3 |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 108 |  |  |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 3 | 3 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense |  | (31) |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 303 | 25 |  |
Cash paid for income taxes | 311 | 131 | 388 |
Deferred Tax Assets, Valuation Allowance | 567 | 235 |  |
Proceeds from Income Tax Refunds | 13 | 3 | 20 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability | 1,700 | 1,500 |  |
Operating Loss Carryforwards | 1,066 |  |  |
Unrecognized Tax Benefits | 33 | 36 | $ 34 | $ 342
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 3 | $ 3 |  |
Foreign Tax Authority | Revenue Commissioners, Ireland |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | $ 23 |  |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-8 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
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