| Document and Entity Information | Jan. 12, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 12, 2025 |
| Entity File Number | 001-36214 |
| Entity Registrant Name | HOLOGIC, INC. |
| Entity Central Index Key | 0000859737 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 04-2902449 |
| Entity Address, Address Line One | 250 Campus Drive |
| Entity Address, City or Town | Marlborough |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01752 |
| City Area Code | 508 |
| Local Phone Number | 263-2900 |
| Title of 12(b) Security | Common Stock, $.01 par value |
| Trading Symbol | HOLX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
