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Revenue (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of net sales revenue
     
  2023 2022 2021
       
Tuition fees 3,505,250 2,827,567 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
       
Timing of revenue recognition of revenue from contracts with customers:      
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 54,662 55,479 78,482
Schedule of revenue by segment
         
Revenue by segment Undergrad Continuing Education Digital Services Elimination (inter-segment transactions) 2023
           
Types of services or goods 2,511,018 146,827 229,285 (11,217) 2,875,913
Tuition fees 2,494,121 146,477 - - 2,640,598
Other 16,897 350 229,285 (11,217) 235,315
           
Timing of revenue recognition 2,511,018 146,827 229,285 (11,217) 2,875,913
Transferred over time 2,494,121 146,827 191,520 (11,217) 2,821,251
Transferred at a point in time 16,897 - 37,765 - 54,662

 

           
Revenue by segment Undergrad Continuing Education Digital Services Elimination (inter-segment transactions) 2022
           
Types of services or goods 2,037,889 108,806 189,984 (7,622) 2,329,057
Tuition fees 2,023,128 108,648 - - 2,131,776
Other 14,761 158 189,984 (7,622) 197,281
           
Timing of revenue recognition 2,037,889 108,806 189,984 (7,622) 2,329,057
Transferred over time 2,024,373 108,806 145,939 (5,540) 2,273,578
Transferred at a point in time 13,516 - 44,045 (2,082) 55,479

 

           
Revenue by segment Undergrad Continuing Education Digital Services Elimination (inter-segment transactions) 2021
           
Types of services or goods 1,498,408 72,983 151,958 (3,978) 1,719,371
Tuition fees 1,486,111 72,983 - - 1,559,094
Other 12,297 - 151,958 (3,978) 160,277
           
Timing of revenue recognition 1,498,408 72,983 151,958 (3,978) 1,719,371
Transferred over time 1,486,111 72,983 81,795 - 1,640,889
Transferred at a point in time 12,297 - 70,163 (3,978) 78,482