| Document and Entity Information | Jun. 04, 2024 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 04, 2024 |
| Entity File Number | 001-04802 |
| Entity Registrant Name | BECTON DICKINSON & CO |
| Entity Central Index Key | 0000010795 |
| Entity Incorporation, State or Country Code | NJ |
| Entity Tax Identification Number | 22-0760120 |
| Entity Address, Address Line One | 1 Becton Drive |
| Entity Address, City or Town | Franklin Lakes |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07417-1880 |
| City Area Code | 201 |
| Local Phone Number | 847-6800 |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Common Stock [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Common stock, par value $1.00 |
| Trading Symbol | BDX |
| Security Exchange Name | NYSE |
| 1.900% Notes due December 15, 2026 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 1.900% Notes due December 15, 2026 |
| Trading Symbol | BDX26 |
| Security Exchange Name | NYSE |
| 3.020% Notes due May 24, 2025 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 3.020% Notes due May 24, 2025 |
| Trading Symbol | BDX25 |
| Security Exchange Name | NYSE |
| 1.208% Notes due June 4, 2026 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 1.208% Notes due June 4, 2026 |
| Trading Symbol | BDX/26A |
| Security Exchange Name | NYSE |
| 1.213% Notes due February 12, 2036 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 1.213% Notes due February 12, 2036 |
| Trading Symbol | BDX/36 |
| Security Exchange Name | NYSE |
| 0.034% Notes due August 13, 2025 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 0.034% Notes due August 13, 2025 |
| Trading Symbol | BDX25A |
| Security Exchange Name | NYSE |
| 3.519% Notes due February 8, 2031 [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 3.519% Notes due February 8, 2031 |
| Trading Symbol | BDX31 |
| Security Exchange Name | NYSE |
