| Document and Entity Information Document | May 18, 2021 |
| Document Type | 8-K |
| Document Period End Date | May 18, 2021 |
| Entity Registrant Name | RAYTHEON TECHNOLOGIES CORPORATION |
| Entity Central Index Key | 0000101829 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-00812 |
| Entity Tax Identification Number | 06-0570975 |
| Entity Address, Address Line One | 870 Winter Street, |
| Entity Address, City or Town | Waltham, |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02451 |
| City Area Code | (781) |
| Local Phone Number | 522-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Common Stock [Member] | |
| Title of 12(b) Security | Common Stock ($1 par value) |
| Trading Symbol | RTX |
| Security Exchange Name | NYSE |
| Notes 2.150% Due 2030 [Member] | |
| Title of 12(b) Security | 2.150% Notes due 2030 |
| Trading Symbol | RTX 30 |
| Security Exchange Name | NYSE |
