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Financial Assets and Liabilities - Derivative financial instruments, interset rate and credit risk - Additional information (Detail) R$ in Thousands | 1 Months Ended | 12 Months Ended
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Jul. 31, 2021 | Dec. 31, 2021 BRL (R$) Item
Disclosure of detailed information about financial instruments [line items] |  |
Description of how entity establishes hedge ratio and what sources of hedge ineffectiveness are |  | The Company established a 1:1 hedge ratio for hedge relationships, since the underlying risk of the interest rate and exchange rate swap is identical to the hedged risk component
Number of categories of customers in credit risk of lease receivables | Item |  | 2
Variation scenario +/- 25% |  |
Disclosure of detailed information about financial instruments [line items] |  |
Percentage of reasonably possible increase (decrease) in associated risk variables |  | 25.00%
Variation scenario +/- 50% |  |
Disclosure of detailed information about financial instruments [line items] |  |
Percentage of reasonably possible increase (decrease) in associated risk variables |  | 50.00%
Comgas [member] | BNDES Project VIII |  |
Disclosure of detailed information about financial instruments [line items] |  |
Maximum percentage of debt instrument not protected | 3.00% |
Electricity trading [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Purchase commitment |  | R$ 0
Electricity trading [member] | Compass Gás e Energia [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Purchase commitment |  | R$ 0

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- Definition The maximum percentage of debt instrument not protected with hedge contract. + References No definition available. + Details
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- Definition The number of categories of customers in credit risk of lease receivables. + References No definition available. + Details
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- Definition The percentage of reasonably possible increase (decrease) in associated risk variables in financial instruments. + References No definition available. + Details
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- Definition The description of how the entity establishes the hedge ratio and what are the sources of hedge ineffectiveness. Hedge ratio is the relationship between the quantity of the hedging instrument and the quantity of the hedged item in terms of their relative weighting. [Refer: Gain (loss) on hedge ineffectiveness] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 22B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_22B_c&doctype=Standard -URIDate 2021-03-24 + Details
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