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23 Post-employment Benefits (Details 8) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of defined benefit plans [line items] |  |  |
Fair value of the plan's assets, ending balance | R$ 11,420,196 | R$ 10,880,721 |
Unified Plan [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Fair value of the plan's assets, beginning balance | 7,546,756 | 6,290,841 | R$ 5,834,572
Return estimated for assets | 607,252 | 685,685 | 593,572
Contributions and distributions | 23,919 | 23,851 | 24,011
Benefits paid | (456,151) | (435,454) | (414,256)
Actuarial gain (losses) | (153,508) | 981,833 | 252,942
Fair value of the plan's assets, ending balance | 7,568,268 | 7,546,756 | 6,290,841
Plan III [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Fair value of the plan's assets, beginning balance | 3,137,754 | 2,178,236 | 1,821,055
Return estimated for assets | 224,591 | 337,476 | 230,703
Contributions and distributions | 136,708 | 4,185 | 9,184
Benefits paid | (203,341) | (174,427) | (133,281)
Actuarial gain (losses) | 334,068 | 792,284 | 250,575
Fair value of the plan's assets, ending balance | 3,629,780 | 3,137,754 | 2,178,236
Assistance Plan [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Fair value of the plan's assets, beginning balance | 196,211 | 172,991 | 170,923
Return estimated for assets | 16,474 | 51,541 | 16,579
Contributions and distributions |  |  |
Benefits paid |  |  |
Actuarial gain (losses) | 9,463 | (28,321) | (14,511)
Fair value of the plan's assets, ending balance | R$ 222,148 | R$ 196,211 | R$ 172,991

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- Definition The amount refers to actuarial gain (losses) uner plan assets. + References No definition available. + Details
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- Definition The amount refers to benefits paid or payable assets. + References No definition available. + Details
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- Definition The decrease (increase) in the plan assets at fair value resulting from contributions to a defined benefit plan. + References No definition available. + Details
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- Definition The amount refers to return estimated for assets. + References No definition available. + Details
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- Definition The amount of current net defined benefit asset. [Refer: Net defined benefit asset] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_57_a&doctype=Standard -URIDate 2020-01-01 + Details
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