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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Contingency [Line Items] |  |  |  |  |  |
Undistributed Earnings of Foreign Subsidiaries | $ 20,000 |  | $ 20,000 |  |  |
Foreign Derived Intangible Income (FDII) |  |  | (142) | $ (214) | $ (121) |
Effective Income Tax Reconciliation, Reorganization, Amount |  |  |  | 207 | 244 |
U.S. research and development credit |  |  | 168 | 164 | 172 |
Effective Income Tax Rate Reconciliation, Change in U.K. Enacted Tax Rate, Amount |  |  | 0 | 0 | 73 |
State income tax, net |  |  | 17 | 59 | 174 |
Disposals of businesses |  |  | 0 | 0 | 108 |
Unrecognized Tax Benefits | 1,442 |  | 1,442 | 1,515 | 1,458 | $ 1,225
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 1,313 |  | 1,313 |  |  |
Income Tax Expense (Benefit) |  |  | (456) | $ (790) | $ (964) |
RTX 2019 Tax Year Statute Lapse |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Tax audit settlements | 53 |  |  |  |  |
Income Tax Expense (Benefit) | 59 |  |  |  |  |
Minimum [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 300 |  | 300 |  |  |
Maximum [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | $ 450 |  | $ 450 |  |  |
Forecast [Member] | Minimum [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Tax audit settlements |  | $ 225 |  |  |  |
Forecast [Member] | Maximum [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Tax audit settlements |  | $ 305 |  |  |  |

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