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Supplemental cash flow information (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Supplemental Cash Flow Information |  |  |
Total additions to contract assets (Note 14) | R$ 6,675,914 | R$ 6,026,053 | R$ 5,240,528
Total additions to intangible assets (Note 15 (b)) | 2,862,651 | 258,473 | 75,400
Items not affecting cash (see breakdown below) | (1,608,619) | (2,293,201) | (1,765,391)
Total additions to intangible and contract assets according to the statement of cash flows | 7,929,946 | 3,991,325 | 3,550,537
Investments and financing operations affecting intangible assets but not cash: |  |  |
Interest capitalized in the year (Note 14 (a)) | 564,302 | 638,208 | 622,803
Contractors payable | 748,088 | 419,457 | 414,645
Performance agreements | 72,205 | 1,001,528 | 576,392
Right of use | 84,048 | 108,405 | 42,182
Construction margin (Note 28) | 139,976 | 125,603 | 109,369
Total | R$ 1,608,619 | R$ 2,293,201 | R$ 1,765,391

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