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Revenue (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Notes and other explanatory information [abstract]      
Tuition fees R$ 3,505,250 R$ 2,827,567 R$ 2,124,589
Other 263,937 213,040 167,441
Deductions      
  Discount and scholarships (240,314) (241,404) (229,254)
  Early payment discounts (195,054) (92,234) (49,879)
  Returns (27,743) (45,402) (42,373)
  Taxes (142,825) (107,004) (74,232)
  PROUNI (287,338) (225,506) (176,921)
Revenue from contracts with customers 2,875,913 2,329,057 1,719,371
Tuition, digital content and app subscription fees - Transferred over time 2,821,251 2,273,578 1,640,889
Other - Transferred at a point in time R$ 54,662 R$ 55,479 R$ 78,482