| Cover - USD ($) | 12 Months Ended | | |
| Dec. 31, 2023 | Feb. 29, 2024 | Jun. 30, 2023 |
| Cover [Abstract] | | | |
| Amendment Description | This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, originally filed with the Securities and Exchange Commission (the “SEC”) on March 5, 2024 (the “Original Form 10-K”). We are filing this Amendment pursuant to General Instruction G(3) of Form 10-K to include the information required by Part III of Form 10-K that we did not include in the Original Form 10-K, as we do not intend to file a definitive proxy statement for an annual meeting of stockholders within 120 days of the end of our fiscal year ended December 31, 2023. In addition, in connection with the filing of this Amendment and pursuant to the rules of the SEC, we are including with this Amendment new certifications of our principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Item 15 of Part IV has also been amended to reflect the filing of these new certifications. Except as described above, no other changes have been made to the Original Form 10-K. The Original Form 10-K continues to speak only as of the date of the Original Form 10-K, and we have not updated the disclosures contained therein to reflect any events which occurred subsequent to the filing of the Original Form 10-K.In this Annual Report, unless otherwise specified, the terms “we”, “our”, “us” and the “Company” refer to Agiliti, Inc. and, where appropriate, its consolidated subsidiaries. The term “THL” refers to Thomas H. Lee Partners, L.P., our principal stockholder, and the term “THL Stockholder” refers to THL Agiliti LLC, an affiliate of Thomas H. Lee Partners, L.P. | | |
| Entity Registrant Name | AGILITI, INC. \DE, | | |
| Entity Central Index Key | 0001749704 | | |
| Document Fiscal Year Focus | 2023 | | |
| Document Fiscal Period Focus | FY | | |
| Amendment Flag | true | | |
| Document Type | 10-K/A | | |
| Document Annual Report | true | | |
| Document Period End Date | Dec. 31, 2023 | | |
| Current Fiscal Year End Date | --12-31 | | |
| Document Transition Report | false | | |
| Entity File Number | 001-40361 | | |
| Entity Incorporation, State or Country Code | DE | | |
| Entity Address, Address Line One | 11095 Viking Drive, | | |
| Entity Tax Identification Number | 83-1608463 | | |
| Entity Address, City or Town | Eden Prairie, | | |
| Entity Address, State or Province | MN | | |
| Entity Address, Postal Zip Code | 55344 | | |
| City Area Code | 952 | | |
| Local Phone Number | 893-3200 | | |
| Title of 12(b) Security | Common Stock, par value $0.0001 | | |
| Trading Symbol | AGTI | | |
| Security Exchange Name | NYSE | | |
| Entity Well-known Seasoned Issuer | No | | |
| Entity Voluntary Filers | No | | |
| Entity Current Reporting Status | Yes | | |
| Entity Interactive Data Current | Yes | | |
| Entity Filer Category | Accelerated Filer | | |
| Entity Emerging Growth Company | false | | |
| Entity Small Business | false | | |
| ICFR Auditor Attestation Flag | true | | |
| Document Financial Statement Error Correction [Flag] | false | | |
| Entity Shell Company | false | | |
| Entity Public Float | | | $ 582,763,154 |
| Entity Common Stock, Shares Outstanding | | 135,960,875 | |
