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Property, plant and equipment, intangible assets, goodwill, right-of-use assets and contract assets - Additional Information (Detail) - BRL (R$) R$ in Thousands |  | 12 Months Ended
--- | --- | ---
Jun. 16, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items] |  |  |
Impairment of assets and goodwill recognized |  | R$ 0 |
Description Of Agreement Of Intangible Assets |  | the concession right recognized upon the business combination of Comgás, which is being amortized over the concession period on a straight line basis, considering the extension of the distribution services for another 20 years |
Cash-generating units [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Assumptions used in discounted cash flow projections, period of long term growth |  | 10 years |
Rumo [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Capitalized borrowing costs |  | R$ 70,609 | R$ 34,107
Weighted average interest rate used to capitalize borrowing costs |  | 11.81% | 8.40%
Additions | R$ 184,100 |  |
TRSP [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Capitalized borrowing costs |  | R$ 7,512 |
Weighted average interest rate used to capitalize borrowing costs |  | 2.78% |
Compass Gás e Energia [member] | Contract assets |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Capitalized borrowing costs |  | R$ 33,829 | R$ 36,522
Weighted average interest rate used to capitalize borrowing costs |  | 8.45% | 7.40%
Rumo S.A. [member] | Cash-generating units [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Provision for Impairment |  | R$ 143,987 |
Provision for Impairment related to fixed assets |  | 143,018 |
Provision for Impairment related to right-of-use assets |  | R$ 966 |

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