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Post-employment Benefits (Details 7) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Unified Plan [Member] |  |
Disclosure of defined benefit plans [line items] |  |
Present value of net actuarial obligations, beginning balance | R$ 6,416,085 | R$ 6,029,530
Increase in net defined benefit liability (asset) resulting from current service cost | 3,150 | 16,650
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) | 522,986 | 700,272
Benefits paid | (559,530) | (539,728)
Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income | (908,391) | 210,135
Discontinued Operations balance adjustments |  | (774)
Present value of net actuarial obligations, ending balance | 5,468,000 | 6,416,085
Plan III [Member] |  |
Disclosure of defined benefit plans [line items] |  |
Present value of net actuarial obligations, beginning balance | 3,820,011 | 3,457,537
Increase in net defined benefit liability (asset) resulting from current service cost | 1,548 | 6,343
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) | 314,125 | 397,091
Benefits paid | (336,775) | (272,585)
Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income | 148,852 | 251,260
Discontinued Operations balance adjustments |  | (19,635)
Present value of net actuarial obligations, ending balance | 3,947,761 | 3,820,011
Assistance Plan [Member] |  |
Disclosure of defined benefit plans [line items] |  |
Present value of net actuarial obligations, beginning balance | 1,657,687 | 1,234,771
Increase in net defined benefit liability (asset) resulting from current service cost | 8,100 | 6,878
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) | 140,973 | 141,877
Benefits paid | (96,036) | (55,014)
Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income | (362,428) | 338,499
Discontinued Operations balance adjustments |  | (9,324)
Present value of net actuarial obligations, ending balance | R$ 1,348,296 | R$ 1,657,687

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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_140_a&doctype=Standard -URIDate 2024-03-27 + Details
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