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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2023
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |  |
Effective Tax Rate | 29.40% | 16.80% | 9.20% | 13.80% |
Charges as a result of Pratt & Whitney's accelerated inspection of PW1100G-JM GTF engines due to rare condition in powder metal. | $ 2,900 |  | $ 2,900 |  |
Deferred Income Tax Benefit |  |  | 728 | $ 1,681 |
Powder Metal Matter |  |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |  |
Deferred Income Tax Benefit | 663 |  | 663 |  |
Minimum [Member] |  |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change | 350 |  | 350 |  |
Minimum [Member] | Forecast [Member] |  |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount |  |  |  |  | $ 275
Maximum [Member] |  |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change | $ 475 |  | $ 475 |  |
Maximum [Member] | Forecast [Member] |  |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount |  |  |  |  | $ 365

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