{"cik":1723935,"taxonomy":"us-gaap","tag":"NetIncomeLoss","label":"Net Income (Loss) Attributable to Parent","description":"The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.","entityName":"Sunlands Technology Group","units":{"CNY":[{"start":"2016-01-01","end":"2016-12-31","val":-253567000,"accn":"0001564590-19-013218","fy":2018,"fp":"FY","form":"20-F","filed":"2019-04-26","frame":"CY2016"},{"start":"2017-01-01","end":"2017-12-31","val":-918578000,"accn":"0001564590-19-013218","fy":2018,"fp":"FY","form":"20-F","filed":"2019-04-26"},{"start":"2017-01-01","end":"2017-12-31","val":-918578000,"accn":"0001564590-20-018336","fy":2019,"fp":"FY","form":"20-F","filed":"2020-04-24","frame":"CY2017"},{"start":"2018-01-01","end":"2018-12-31","val":-927022000,"accn":"0001564590-19-013218","fy":2018,"fp":"FY","form":"20-F","filed":"2019-04-26"},{"start":"2018-01-01","end":"2018-12-31","val":-927022000,"accn":"0001564590-20-018336","fy":2019,"fp":"FY","form":"20-F","filed":"2020-04-24"},{"start":"2018-01-01","end":"2018-12-31","val":-927022000,"accn":"0001564590-21-019185","fy":2020,"fp":"FY","form":"20-F","filed":"2021-04-16","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-394817000,"accn":"0001564590-20-018336","fy":2019,"fp":"FY","form":"20-F","filed":"2020-04-24"},{"start":"2019-01-01","end":"2019-12-31","val":-394817000,"accn":"0001564590-21-019185","fy":2020,"fp":"FY","form":"20-F","filed":"2021-04-16"},{"start":"2019-01-01","end":"2019-12-31","val":-394817000,"accn":"0001564590-22-016148","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-27","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-430542000,"accn":"0001564590-21-019185","fy":2020,"fp":"FY","form":"20-F","filed":"2021-04-16"},{"start":"2020-01-01","end":"2020-12-31","val":-430542000,"accn":"0001564590-22-016148","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-27"},{"start":"2020-01-01","end":"2020-12-31","val":-430542000,"accn":"0000950170-23-014218","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-25","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":219056000,"accn":"0001564590-22-016148","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-27"},{"start":"2021-01-01","end":"2021-12-31","val":219056000,"accn":"0000950170-23-014218","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-25"},{"start":"2021-01-01","end":"2021-12-31","val":219056000,"accn":"0000950170-24-047906","fy":2023,"fp":"FY","form":"20-F","filed":"2024-04-25","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":643959000,"accn":"0000950170-23-014218","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-25"},{"start":"2022-01-01","end":"2022-12-31","val":643959000,"accn":"0000950170-24-047906","fy":2023,"fp":"FY","form":"20-F","filed":"2024-04-25"},{"start":"2022-01-01","end":"2022-12-31","val":643959000,"accn":"0000950170-25-058319","fy":2024,"fp":"FY","form":"20-F","filed":"2025-04-25","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":640830000,"accn":"0000950170-24-047906","fy":2023,"fp":"FY","form":"20-F","filed":"2024-04-25"},{"start":"2023-01-01","end":"2023-12-31","val":640830000,"accn":"0000950170-25-058319","fy":2024,"fp":"FY","form":"20-F","filed":"2025-04-25"},{"start":"2023-01-01","end":"2023-12-31","val":640830000,"accn":"0001193125-26-175368","fy":2025,"fp":"FY","form":"20-F","filed":"2026-04-24","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":342082000,"accn":"0000950170-25-058319","fy":2024,"fp":"FY","form":"20-F","filed":"2025-04-25"},{"start":"2024-01-01","end":"2024-12-31","val":342082000,"accn":"0001193125-26-175368","fy":2025,"fp":"FY","form":"20-F","filed":"2026-04-24","frame":"CY2024"},{"start":"2025-01-01","end":"2025-12-31","val":365631000,"accn":"0001193125-26-175368","fy":2025,"fp":"FY","form":"20-F","filed":"2026-04-24","frame":"CY2025"}],"USD":[{"start":"2018-01-01","end":"2018-12-31","val":-134830000,"accn":"0001564590-19-013218","fy":2018,"fp":"FY","form":"20-F","filed":"2019-04-26","frame":"CY2018"},{"start":"2019-01-01","end":"2019-12-31","val":-56713000,"accn":"0001564590-20-018336","fy":2019,"fp":"FY","form":"20-F","filed":"2020-04-24","frame":"CY2019"},{"start":"2020-01-01","end":"2020-12-31","val":-65983000,"accn":"0001564590-21-019185","fy":2020,"fp":"FY","form":"20-F","filed":"2021-04-16","frame":"CY2020"},{"start":"2021-01-01","end":"2021-12-31","val":34373000,"accn":"0001564590-22-016148","fy":2021,"fp":"FY","form":"20-F","filed":"2022-04-27","frame":"CY2021"},{"start":"2022-01-01","end":"2022-12-31","val":93368000,"accn":"0000950170-23-014218","fy":2022,"fp":"FY","form":"20-F","filed":"2023-04-25","frame":"CY2022"},{"start":"2023-01-01","end":"2023-12-31","val":90258000,"accn":"0000950170-24-047906","fy":2023,"fp":"FY","form":"20-F","filed":"2024-04-25","frame":"CY2023"},{"start":"2024-01-01","end":"2024-12-31","val":46866000,"accn":"0000950170-25-058319","fy":2024,"fp":"FY","form":"20-F","filed":"2025-04-25","frame":"CY2024"},{"start":"2025-01-01","end":"2025-12-31","val":52284000,"accn":"0001193125-26-175368","fy":2025,"fp":"FY","form":"20-F","filed":"2026-04-24","frame":"CY2025"}]}}