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INFORMATION BY BUSINESS SEGMENT - Income from external customers per segment (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating Segment |  |  |
Other operating income | R$ 651,280 | R$ 186,924 | R$ 1,210,754
Reportable Segments [Member] |  |  |
Operating Segment |  |  |
Power supply for distribution companies | 17,030,455 | 14,104,623 | 11,836,975
Power supply for end consumers | 3,853,830 | 3,925,510 | 3,334,527
CCEE | 1,680,285 | 1,159,158 | 3,090,100
O&M revenue | 11,387,237 | 11,055,951 | 10,188,340
Construction revenue | 2,960,792 | 1,501,631 | 1,618,045
Financial effect of Itaipu |  | 287,610 | 65,831
Contract revenue | 7,136,080 | 7,901,256 | 9,946,627
Other operating income | 426,427 | 1,101,817 | 925,455
Deduction from operating income | (7,316,198) | (6,963,323) | (6,379,066)
Total net operating income | 37,158,908 | 34,074,233 | 34,626,834
Administration |  |  |
Operating Segment |  |  |
CCEE |  | 17,708 | 1,426,062
Financial effect of Itaipu |  | 287,610 | 65,831
Other operating income | 115,371 | 222,037 | 146,312
Deduction from operating income | (5,101) | (147,367) | (271,841)
Total net operating income | 110,270 | 379,988 | 1,366,364
Generation |  |  |
Operating Segment |  |  |
Power supply for distribution companies | 17,030,455 | 14,104,623 | 11,836,975
Power supply for end consumers | 3,853,830 | 3,925,510 | 3,334,527
CCEE | 1,680,285 | 1,141,450 | 1,664,038
O&M revenue | 4,052,072 | 4,676,630 | 4,220,474
Construction revenue |  | 7,324 | 82,205
Other operating income | (104,270) | 173,774 | 462,762
Deduction from operating income | (4,378,811) | (4,022,072) | (3,847,074)
Total net operating income | 22,133,561 | 20,007,239 | 17,753,907
Transmission |  |  |
Operating Segment |  |  |
O&M revenue | 7,335,165 | 6,379,321 | 5,967,866
Construction revenue | 2,960,792 | 1,494,307 | 1,535,840
Contract revenue | 7,136,080 | 7,901,256 | 9,946,627
Other operating income | 415,326 | 706,006 | 316,381
Deduction from operating income | (2,932,286) | (2,793,884) | (2,260,151)
Total net operating income | R$ 14,915,077 | R$ 13,687,006 | R$ 15,506,563

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