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Private Pension Liabilities - Summary Of Net Defined Benefit Liability (Asset) (Detail) - BRL (R$)
R$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Disclosure of defined benefit plans [abstract]        
Beginning balance R$ 3,759,090 R$ 16,059 R$ 16,059  
Contributions received 278,357 1,766 609,639 R$ 16,059
Transfer with third party plans 1,636,370 31,777 3,047,492  
Redemptions paid (46,585)   (20,153)  
Gain (loss) from FIE (472,144) 324    
Interest received from FIE     106,053  
Ending Balance 5,155,088 49,926 3,759,090 16,059
Contributions invested in FIEs R$ 5,155,088 R$ 49,926 R$ 3,759,090 R$ 16,059