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Financing - Summary (Details) R$ in Thousands, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 04, 2018 USD ($) | Nov. 06, 2018 USD ($) | Sep. 17, 2018 USD ($) | Sep. 30, 2018 USD ($) | Mar. 31, 2017 USD ($) | Sep. 30, 2018 USD ($) item | Dec. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 BRL (R$) | Dec. 04, 2018 BRL (R$) | Nov. 30, 2018 USD ($) | Nov. 06, 2018 BRL (R$) | Sep. 30, 2018 BRL (R$) | Sep. 17, 2018 BRL (R$) | Feb. 28, 2018 USD ($) | Dec. 31, 2017 BRL (R$) | Dec. 31, 2016 BRL (R$)
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 31,074,056 |  |  |  |  |  |  | R$ 12,191,856 | R$ 14,012,779
Current Portion (includes interest payments) |  |  |  |  |  |  |  |  | 3,425,399 |  |  |  |  |  |  | 2,115,067 |
Non-Current Portion |  |  |  |  |  |  |  |  | 27,648,657 |  |  |  |  |  |  | R$ 10,076,789 |
Export financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ | $ 2,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Export financing | Suzano Europa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  | R$ 8,800,000 |  |  |  |  |  |  |
Debt instrument term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Export credit note | CDI |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  |  |  |  | R$ 1,300,000 |  |  |  |
Number of Export Credit Notes | item |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Senior Notes | Suzano Trading |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of notes | $ |  |  |  |  |  |  | $ 456 |  |  |  |  |  |  |  |  |  |
Senior Notes 2026 | Suzano Austria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  |  |  |  | $ 200 |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  | 4.62% |  |  |  |  |  |  |  |  | 4.62% |
Senior Notes 2047 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  | $ 500 |  |  |  |  |  |  |  |  |  | R$ 1,900,000 |  |  |  |  |
Annual average interest rate |  | 6.90% |  |  |  |  |  |  |  |  |  | 6.90% |  |  |  |  |
Debt instrument term |  | 29 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes 2047 | Suzano Trading |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  |  |  |  | $ 200 |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  | 6.30% |  |  |  |  |  |  |  |  | 6.30% |
Senior Notes 2047 | Suzano Austria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  |  | $ 300 |  |  |  |  |  | $ 500 |  |  |  |  |  |
Annual average interest rate |  |  |  |  | 7.00% |  |  |  |  |  | 6.85% |  |  |  |  |  |
Percentage of return for investors |  |  |  |  | 7.38% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes 2029 | Suzano Trading |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  | $ 1,000 |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |
Senior Notes 2029 | Suzano Austria |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  | R$ 4,700,000 |  |  |
Annual average interest rate |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |
Debt instrument term |  |  | 11 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of return for investors |  |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Syndicated Loan | Suzano Europa | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750 |  |
Rural Producer Certificate | CDI |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  |  |  |  | R$ 275,000 |  |  |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 1,542,959 |  |  |  |  |  |  | R$ 1,659,107 |
Property, plant and equipment | BNDES - Finem | Fixed rate /TJLP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 7.18% | 7.18% |  |  |  |  |  |  |  |
Interest rate, threshold for interest capitalization |  |  |  |  |  |  | 6.00% | 6.00% | 6.00% |  |  |  |  |  |  | 6.00% |
Borrowings |  |  |  |  |  |  |  |  | R$ 333,289 |  |  |  |  |  |  | R$ 339,798 |
Property, plant and equipment | BNDES - Finem | Currency basket / US$ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 7.13% | 7.13% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 161,517 |  |  |  |  |  |  | 165,125 |
Property, plant and equipment | BNDES - Finame | Fixed rate /TJLP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 5.08% | 5.08% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 2,980 |  |  |  |  |  |  | 4,708 |
Property, plant and equipment | FNE - BNB | Fixed rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 6.46% | 6.46% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 217,014 |  |  |  |  |  |  | 244,452 |
Property, plant and equipment | FINEP | Fixed rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 4.00% | 4.00% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 12,860 |  |  |  |  |  |  | 20,577 |
Property, plant and equipment | Financial lease | CDI / US$ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 18,225 |  |  |  |  |  |  | 19,686 |
Property, plant and equipment | Export Credit Agency - ECA | US$/LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  |  |  |  |  | $ 535 |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 4.13% | 4.13% |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  | 9 years 6 months |  |  |  |  |  |  |  |  |
Maximum consolidated net debt / consolidated EBITDA ratio |  |  |  |  |  |  |  | 2.85 |  |  |  |  |  |  |  |  |
Minimum consolidated EBITDA / net interest expense |  |  |  |  |  |  |  | 2.0 |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 797,074 |  |  |  |  |  |  | 864,761 |
Working capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 29,531,097 |  |  |  |  |  |  | 10,532,749 |
Working capital | Export financing | US$/LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 4.27% | 4.27% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 2,171,390 |  |  |  |  |  |  | 844,388 |
Working capital | Export credit note | CDI |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 6.69% | 6.69% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 3,799,257 |  |  |  |  |  |  | 2,907,200 |
Working capital | Senior Notes | US$/Fixed rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 6.28% | 6.28% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 11,406,027 |  |  |  |  |  |  | 4,730,800 |
Working capital | Trade notes discount-Vendor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33,363 |
Working capital | Syndicated Loan | US$/LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 3.95% | 3.95% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 11,825,134 |  |  |  |  |  |  | 1,986,691 |
Working capital | Fund of Investments in Receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 22,054 |  |  |  |  |  |  | 24,665 |
Working capital | Rural Producer Certificate | CDI |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual average interest rate |  |  |  |  |  |  |  | 7.43% | 7.43% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 279,838 |  |  |  |  |  |  |  |
Working capital | Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  | R$ 27,397 |  |  |  |  |  |  | R$ 5,642 |

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