Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2026	Apr. 30, 2026
Document Information [Line Items]
Document Type	10-Q/A
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2026
Document Fiscal Year Focus	2026
Entity File Number	000-56778
Entity Registrant Name	Warburg Pincus Access Fund, L.P.
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	450 Lexington Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10017
Entity Tax Identification Number	39-3512234
City Area Code	212
Local Phone Number	878-0600
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Amendment Flag	true
Document Fiscal Period Focus	Q1
Entity Central Index Key	0002082826
Current Fiscal Year End Date	--12-31
Amendment Description	Explanatory Note Warburg Pincus Access Fund, L.P. is filing this Amendment No. 1 (the “Amendment”) to its Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, which was filed with the Securities and Exchange Commission on May 15, 2026 (the “Form 10-Q”), for the sole purpose of correcting an inadvertent hyperlink included in the original filing by a service provider. This Amendment does not change any previously reported financial results, does not reflect events occurring after the filing of the Form 10-Q and, other than correcting the referenced hyperlink and filing Exhibit 10.1, does not modify or update the disclosures in the Form 10-Q in any way. As required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), new certifications by the registrant’s Principal Executive Officer and Principal Financial Officer are being filed as exhibits to this Amendment pursuant to Rule 13a-14(a) under the Exchange Act. In light of the fact that this Amendment does not include any financial statements and does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. In addition, the registrant has not included certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, as amended, since this Amendment does not include any financial statements. This Amendment should be read in conjunction with the Form 10-Q.
Class A1 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		10,803,520
Class A2 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		480,000
Class A3 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		118,546
Class A4 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Class B1 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,860,365
Class B2 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Class B3 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		59,151
Class B4 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Class C1 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Class C2 Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Class D Unit [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0
Class E Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		46,400

Warburg Pincus Access Fund, L.P. 10-Q/A