v3.26.1
Cover
 5 Months Ended
Dec. 31, 2025
Document Information [Line Items]  
Document Type S-1
Registrant Name Forgent Power Solutions, Inc.
Entity Incorporation, State or Country Code DE
Entity Primary SIC Number 3620
Entity Tax Identification Number 39-3386651
Entity Address, Address Line One 11500 Dayton Parkway
Entity Address, City or Town Dayton
Entity Address, State or Province MN
Entity Address, Postal Zip Code 55369
City Area Code 763
Local Phone Number 588-0536
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0002080126
Amendment Flag false
Business Contact [Member]  
Document Information [Line Items]  
Contact Personnel Name Gary J. Niederpruem
Entity Address, Address Line One 11500 Dayton Parkway
Entity Address, City or Town Dayton
Entity Address, State or Province MN
Entity Address, Postal Zip Code 55369
City Area Code 763
Local Phone Number 588-0536