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Income Taxes (Unrecognized Tax Benefit Changes) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2022
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent | 9.30% |  | 29.80% |
Incremental Percentage Points Related to Foreign Derived Intangible Income (FDII) and Capitalization of R&D, Benefit | 5.00% |  |  |
Forcepoint |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Disposition of Business, Expense (Benefit), Amount |  |  | $ 148 |
Raytheon Intelligence & Space global training and services business |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Disposition of Business, Expense (Benefit), Amount |  | $ (104) |  |
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 | $ 20 |  |  |
Minimum [Member] | Forecast [Member] |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount |  |  |  | $ 20
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 | $ 500 |  |  |
Maximum [Member] | Forecast [Member] |  |  |  |
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount |  |  |  | $ 100

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