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Post-employment Benefits (Details 7) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Unified Plan [Member]
IfrsStatementLineItems [Line Items]
Present value of net actuarial obligations, beginning balance	R$ 6,029,530	R$ 6,145,601
Cost of services	16,650	169
Cost of interest	700,272	673,724
Benefits paid	(539,728)	(523,792)
Actuarial (gain) losses	210,135	(266,172)
Discontinued Operations balance adjustments	(774)
Present value of net actuarial obligations, ending balance	6,416,085	6,029,530
PlanIII [member]
IfrsStatementLineItems [Line Items]
Present value of net actuarial obligations, beginning balance	3,457,537	3,337,093
Cost of services	6,343	2,018
Cost of interest	397,091	364,901
Benefits paid	(272,585)	(264,096)
Actuarial (gain) losses	251,260	17,621
Discontinued Operations balance adjustments	(19,635)
Present value of net actuarial obligations, ending balance	3,820,011	3,457,537
Assistance Plan [Member]
IfrsStatementLineItems [Line Items]
Present value of net actuarial obligations, beginning balance	1,234,771	1,491,118
Cost of services	6,878	6,172
Cost of interest	141,877	155,389
Benefits paid	(55,014)	(342)
Actuarial (gain) losses	338,499	(417,566)
Discontinued Operations balance adjustments	(9,324)
Present value of net actuarial obligations, ending balance	R$ 1,657,687	R$ 1,234,771

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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
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-IssueDate 2023-01-01
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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
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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
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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 [member]]

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