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Basis of Presentation and Summary of Accounting Principles (Collaborative Arrangements) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cost of Products Sold [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Collaborator Share Of Sales | $ 2,058 | $ 1,534 | $ 1,183
Collaborator Share Of Program Costs Amount | (154) | (160) | (147)
Cost of Services Sold [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Collaborator Share Of Sales | 1,808 | 1,428 | 1,374
Research and Development [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Collaborator Share Of Program Costs Amount | (182) | (135) | (177)
Selling General and Administrative [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Collaborator Share Of Program Costs Amount | $ (105) | $ (85) | $ (99)

X
- Definition Income statement amounts attributable to program costs transactions arising from the collaborative arrangement between participants for each period an income statement is presented. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Income statement amounts attributable to revenue transactions arising from the collaborative arrangement between participants for each period an income statement is presented. + References No definition available. + Details
Name: | rtx_CollaboratorShareOfRevenuesAmount
Namespace Prefix: | rtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=rtx_CostOfServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |