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Risks Arising from Financial Instruments - Summary of Floating Rate Debt after Hedging (Detail) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Brazilian Real [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate | 8.88% | 2.09%
Volatility rates in % | 11.58% | 16.77%
Euro [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Volatility rates in % | 10.64% | 16.83%
US Dollar [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate | 0.21% | 0.24%
Volatility rates in % | 48.10% | 58.30%
Bottom of range [member] | Brazilian Real [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Possible interest rate 2 | 7.85% | 1.74%
Bottom of range [member] | US Dollar [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Possible interest rate 2 | 0.11% | 0.10%
Top of range [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate | 4.00% |
Top of range [member] | Brazilian Real [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Possible interest rate 2 | 9.91% | 2.44%
Top of range [member] | US Dollar [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Possible interest rate 2 | 0.31% | 0.38%

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