Cover Page - USD ($) $ in Millions	12 Months Ended
Cover Page - USD ($) $ in Millions	Jun. 30, 2024	Oct. 23, 2024	Dec. 31, 2023
Document Information [Line Items]
Document Type	10-K/A
Document Annual Report	true
Document Transition Report	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	true
Document Period End Date	Jun. 30, 2024
Entity File Number	001-36587
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-8737688
Entity Address, Address Line One	14 Schoolhouse Road
Entity Address, City or Town	Somerset,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08873
City Area Code	(732)
Local Phone Number	537-6200
Trading Symbol	CTLT
Entity Registrant Name	CATALENT, INC.
Entity Central Index Key	0001596783
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (shares)		181,511,586
Entity Interactive Data Current	Yes
Security Exchange Name	NYSE
Title of 12(b) Security	Common stock, $0.01 par value per share
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 8,100
Amendment Description	Catalent, Inc. (the “Company”) is filing this Amendment No. 1 (“Amendment No. 1”) to its Annual Report on Form 10-K for the fiscal year ended June 30, 2024 as filed with the Securities Exchange Commission (the “SEC”) on September 6, 2024 (the “Original Form 10-K”), to provide the information required by Part III of Form 10-K. This information was previously omitted from the Original Form 10-K in reliance on the General Instructions to Form 10-K, which permits the information in Part III to be incorporated in Form 10-K by reference from the registrant’s definitive proxy statement or included in an amendment to Form 10-K, in either case filed with the SEC no later than 120 days after the end of the fiscal year. Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), this Amendment No. 1 also contains new certifications pursuant to Sections 302 and 906 of the Sarbanes-Oxley Act of 2002, which are being filed and furnished, respectively, as exhibits to this Amendment No. 1 under Item 15 of Part IV. Because this Amendment No. 1 does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K under the Exchange Act, paragraphs 4 and 5 of the Section 302 certifications have been omitted. As a result, Item 15 of Part IV has been amended to reflect the filing and furnishing of these new certifications, and to reflect the filing of compensatory agreements relating to individuals who became a named executive officer for the first time. Except as otherwise expressly noted herein, this Amendment No. 1 does not modify or update in any way the financial position, results of operations, cash flows, or other information contained or incorporated in, including the exhibits thereto, the Original Form 10-K, nor does it reflect events occurring after the filing of the Original Form 10-K. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Form 10-K and with our other filings made with the SEC subsequent to the filing of the Original Annual Report. In this Amendment No. 1, we provide our website address, www.catalent.com, to disclose that certain information is available on our website. Information contained on, or that can be accessed through, our website is not incorporated by reference into this Amendment No. 1, and references to our website address in this Amendment No. 1 are inactive textual references only.
Document Financial Statement Error Correction [Flag]	false

Catalent, Inc. 10-K/A