| Cover Page | Dec. 10, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | QUALCOMM INC/DE |
| Entity Central Index Key | 0000804328 |
| Amendment Flag | false |
| Document Type | 8-K |
| Document Period End Date | Dec. 10, 2024 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-19528 |
| Entity Tax Identification Number | 95-3685934 |
| Entity Address, Address Line One | 5775 Morehouse Drive |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92121 |
| City Area Code | 858 |
| Local Phone Number | 587-1121 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value |
| Trading Symbol | QCOM |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
