{"cik":25598,"taxonomy":"us-gaap","tag":"EarningsPerShareBasic","label":"Earnings Per Share, Basic","description":"The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.","entityName":"OneMain Finance Corporation","units":{"USD/shares":[{"start":"2025-01-01","end":"2025-06-30","val":3.19,"accn":"0001584207-26-000031","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-07-30"},{"start":"2025-04-01","end":"2025-06-30","val":1.4,"accn":"0001584207-26-000031","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-07-30","frame":"CY2025Q2"},{"start":"2026-01-01","end":"2026-06-30","val":3.26,"accn":"0001584207-26-000031","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-07-30"},{"start":"2026-04-01","end":"2026-06-30","val":1.32,"accn":"0001584207-26-000031","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-07-30","frame":"CY2026Q2"}]}}