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Post-employment Benefits (Details 4) - number
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Unified Plan [Member]    
Disclosure of defined benefit plans [line items]    
Number of active participants 4,000 10,000
Number of inactive participants 4,013,000 4,115,000
Number of other participants of retirement benefit plan 0 0
Number of participants of retirement benefit plan receiving benefits 4,017,000 4,125,000
Plan III [Member]    
Disclosure of defined benefit plans [line items]    
Number of active participants 4,501,000 5,806,000
Number of inactive participants 6,357,000 5,379,000
Number of other participants of retirement benefit plan 0 0
Number of participants of retirement benefit plan receiving benefits 10,858,000 11,185,000
Assistance Plan [Member]    
Disclosure of defined benefit plans [line items]    
Number of active participants 4,302,000 5,687,000
Number of inactive participants 9,686,000 8,857,000
Number of other participants of retirement benefit plan 10,526,000 19,925,000
Number of participants of retirement benefit plan receiving benefits 24,514,000 34,469,000