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Commitments - Detailed Information about Contractual Obligations and Commitments (Detail) R$ in Millions | Dec. 31, 2017 BRL (R$)
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Disclosure of commitments [Line Items] |
Contractual obligations and commitments | R$ 55,235
Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 7,940
Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 20,492
Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,995
Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,760
Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,337
Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 17,661
Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 3,611
Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 439
2018 [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 9,043
2018 [member] | Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,278
2018 [member] | Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 2,837
2018 [member] | Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 296
2018 [member] | Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 264
2018 [member] | Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 227
2018 [member] | Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 3,497
2018 [member] | Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 546
2018 [member] | Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 98
2019 [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 8,328
2019 [member] | Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,332
2019 [member] | Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 2,815
2019 [member] | Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 307
2019 [member] | Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 272
2019 [member] | Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 232
2019 [member] | Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 2,735
2019 [member] | Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 559
2019 [member] | Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 76
2020 [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 8,800
2020 [member] | Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,367
2020 [member] | Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 3,178
2020 [member] | Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 323
2020 [member] | Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 291
2020 [member] | Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 236
2020 [member] | Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 2,758
2020 [member] | Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 586
2020 [member] | Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 61
2021 [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 9,587
2021 [member] | Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,339
2021 [member] | Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 3,724
2021 [member] | Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 338
2021 [member] | Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 297
2021 [member] | Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 220
2021 [member] | Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 2,994
2021 [member] | Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 611
2021 [member] | Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 64
2022 [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 9,835
2022 [member] | Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,326
2022 [member] | Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 3,898
2022 [member] | Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 356
2022 [member] | Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 311
2022 [member] | Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 206
2022 [member] | Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 3,030
2022 [member] | Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 640
2022 [member] | Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 68
After 2022 [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 9,642
After 2022 [member] | Purchase of energy from Itaip [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 1,298
After 2022 [member] | Purchase of energy auctions [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 4,040
After 2022 [member] | Purchase of energy bilateral contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 375
After 2022 [member] | Quotas for Angra [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 325
After 2022 [member] | Transport of energy from Itaipu [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 216
After 2022 [member] | Other energy purchase contracts [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 2,647
After 2022 [member] | Gas Distribution [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | 669
After 2022 [member] | Operating Lease [member] |
Disclosure of commitments [Line Items] |
Contractual obligations and commitments | R$ 72

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