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Property, plant and equipment, intangible assets, goodwill, right-of-use assets and contract assets - Summary of Intangible Assets (Excluding Goodwill) (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets other than goodwill |  | R$ 16,648,681 | R$ 16,219,719
Concession rights [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets other than goodwill |  | R$ 15,706,265 | 15,318,664
Concession rights [member] | Companhia de Gas de Sao Paulo - COMGAS [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization | [1] | 2.00% |
Intangible assets other than goodwill | [1] | R$ 8,953,495 | 8,425,014
Concession rights [member] | Rumo Malha Norte SA [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization | [2] | 1.59% |
Intangible assets other than goodwill | [2] | R$ 6,752,770 | 6,893,650
Operating license [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization |  | 3.70% |
Intangible assets other than goodwill |  | R$ 211,895 | 187,899
Trademarks [member] | Comma [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets other than goodwill |  | 57,439 | 54,207
Customer-related intangible assets [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets other than goodwill |  | R$ 575,459 | 519,915
Customer-related intangible assets [member] | Companhia de Gas de Sao Paulo - COMGAS [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization |  | 20.00% |
Intangible assets other than goodwill |  | R$ 276,811 | 210,038
Customer-related intangible assets [member] | Moove cash generating unit [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization |  | 6.00% |
Intangible assets other than goodwill |  | R$ 297,286 | 309,877
Customer-related intangible assets [member] | Other |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization |  | 20.00% |
Intangible assets other than goodwill |  | R$ 1,362 |
Computer software [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization |  | 20.00% |
Intangible assets other than goodwill |  | R$ 46,770 | 86,090
Other [member] | Mobil [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Annual rate of amortization |  | 20.00% |
Intangible assets other than goodwill |  | R$ 50,853 | 52,944
Other [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Intangible assets other than goodwill |  | R$ 97,623 | R$ 139,034
[1] | Refers to the intangible asset for the public gas distribution service concession, which represents the right to charge users for the supply of gas, comprised of: (i) the concession rights recognized in the business combination and (ii) concession assets.
[2] | Refers to the railroad concession right agreement of Rumo. The amount will be amortized until the end of the concession in 2079.

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