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Income Taxes - Tax Carryforwards and Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Operating Loss and Tax Credit Carryforwards [Line Items] |  |
Net operating loss carryforwards | $ 346 | $ 330
Tax credit carryforwards | 4,905 | $ 4,646
Federal [Member] |  |
Operating Loss and Tax Credit Carryforwards [Line Items] |  |
Net operating loss carryforwards | 11 |
Tax credit carryforwards | 4,555 |
Net operating loss carryforwards with indefinite expiration period | 9 |
State [Member] |  |
Operating Loss and Tax Credit Carryforwards [Line Items] |  |
Net operating loss carryforwards | 315 |
Tax credit carryforwards | 345 |
Tax credit carryforward with indefinite expiration period | 191 |
Foreign [Member] |  |
Operating Loss and Tax Credit Carryforwards [Line Items] |  |
Net operating loss carryforwards | 20 |
Tax credit carryforwards | 5 |
Net operating loss carryforwards with indefinite expiration period | $ 1 |

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