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Fair Value of Financial Instruments - Summary of Sensitivity Analyses Operations of Level 3 (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Interest rate [Member] | Scenarios I [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | R$ (1.5) | R$ (0.8)
Impact, Stockholders' equity | 0.0 | 0.0
Interest rate [Member] | Scenarios II [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | (38.2) | (19.8)
Impact, Stockholders' equity | 0.0 | 0.0
Interest rate [Member] | Scenarios III [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | (76.4) | (38.2)
Impact, Stockholders' equity | 0.0 | 0.0
Shares [member] | Scenarios I [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | 0.0 | 0.0
Impact, Stockholders' equity | 0.0 | 0.0
Shares [member] | Scenarios II [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | 0.0 | 0.0
Impact, Stockholders' equity | 0.0 | 0.0
Nonlinear [Member] | Scenarios I [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | (56.5) | (8.3)
Impact, Stockholders' equity | 0.0 | 0.0
Nonlinear [Member] | Scenarios II [Member] |  |
Disclosure of Fair Value Financial Sensitivity Analysis [Line Items] |  |
Impact, Income | (93.3) | (11.6)
Impact, Stockholders' equity | R$ 0.0 | R$ 0.0

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