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Income Taxes (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 18, 2019 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Income Tax Contingency [Line Items] |  |  |  |  |
Effective income tax rate |  | 19.70% | 18.90% | 18.30% | 22.50%
Federal statutory income tax rate |  | 21.00% | 21.00% | 21.00% | 21.00%
Tax exempt income |  | $ 11 | $ 13 | $ 4 | $ 9
Sale of business unit |  |  |  | 15 |
Increase in income taxes receivable, noncurrent |  |  |  | 261 |
Decrease in income taxes payable |  |  |  | 95 |
Increase in deferred tax liabilities |  |  |  | $ 356 |
Minimum | Internal Revenue Service | 2018 Tax Year |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Unrecognized income tax expense due to change in tax regulations | $ 180 |  |  |  |
Maximum | Internal Revenue Service | 2018 Tax Year |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Unrecognized income tax expense due to change in tax regulations | $ 220 |  |  |  |

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