XML 87 R65.htm IDEA: XBRL DOCUMENT v3.22.1
Segment Information - Additional Information (Detail)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
BRL (R$)
Item
Dec. 31, 2020
BRL (R$)
Dec. 31, 2019
BRL (R$)
Disclosure of operating segments [line items]      
Revenue from Major Customer R$ 25,865,001 R$ 20,437,835 R$ 20,611,409
Rumo S.A. [member] | Major Customers [member]      
Disclosure of operating segments [line items]      
Number of largest customers | Item 6    
Revenue from Major Customer R$ 2,916,247 R$ 2,939,945 R$ 773,286