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24. POST-EMPLOYMENT OBLIGATIONS (Details 4) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of defined benefit plans [line items] |  |  |  |
Net liabilities, Beginning balance | R$ 6,709 | R$ 4,989 |  | R$ 4,186
Expense recognized in Statement of income | 491 | 464 |  | 405
Contributions paid | (367) | (343) |  | (307)
Actuarial losses (gains) | 10 | 1,599 |  | 705
Net liabilities, Ending balance | 6,843 | 6,709 |  | 4,989
Current liabilities | 305 | 288 | [1] |
Non-currentliabilities | 6,538 | 6,421 | [1] |
Pension plans and retirement supplement plans [member] |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Net liabilities, Beginning balance | 2,972 | 2,170 |  | 2,068
Expense recognized in Statement of income | 206 | 197 |  | 193
Contributions paid | (211) | (200) |  | (178)
Actuarial losses (gains) | (58) | 805 |  | 87
Net liabilities, Ending balance | 2,909 | 2,972 |  | 2,170
Health plan [member] |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Net liabilities, Beginning balance | 3,102 | 2,344 |  | 1,809
Expense recognized in Statement of income | 236 | 222 |  | 183
Contributions paid | (143) | (131) |  | (118)
Actuarial losses (gains) | 124 | 667 |  | 402
Net liabilities, Ending balance | 3,319 | 3,102 |  | 2,344
Dental plan [member] |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Net liabilities, Beginning balance | 61 | 48 |  | 38
Expense recognized in Statement of income | 5 | 5 |  | 4
Contributions paid | (3) | (2) |  | (2)
Actuarial losses (gains) | 1 | 10 |  | 8
Net liabilities, Ending balance | 64 | 61 |  | 48
Life insurance plan [member] |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Net liabilities, Beginning balance | 574 | 427 |  | 271
Expense recognized in Statement of income | 44 | 40 |  | 25
Contributions paid | (10) | (10) |  | (9)
Actuarial losses (gains) | (57) | 117 |  | 140
Net liabilities, Ending balance | R$ 551 | R$ 574 |  | R$ 427
[1] | See note 2.8.

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of current net defined benefit liability. [Refer: Net defined benefit liability] + 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 amount of employer contributions to retirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2020-01-01 -Paragraph 35 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2020-en-r&anchor=para_35_b_i&doctype=Standard -URIDate 2020-01-01 + Details
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