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Note 27 - Financial Instruments and Risks - Interest Rate Hedging (Details) - BRL (R$) R$ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Interest rate risk, Brazilian Real [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, post-fixed interest rate | 9.20% | 10.00%
Pre-hedge, post-fixed interest rate, amount | R$ 402.3 | R$ 667.7
Post-hedge, post-fixed interest rate | 7.60% | 12.60%
Post-hedge, post-fixed interest rate, amount | R$ 714.1 | R$ 2,375.6
Pre-hedge, pre-set interest rate | 6.40% | 6.80%
Pre-hedge, pre-set interest rate, amount | R$ 682.5 | R$ 1,223.5
Post-hedge, pre-set interest rate | 5.90% | 6.20%
Post-hedge, pre-set interest rate, amount | R$ 370.8 | R$ 841.9
Interest rate risk, American Dollar [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, post-fixed interest rate | 2.70% | 1.50%
Pre-hedge, post-fixed interest rate, amount | R$ 555.3 | R$ 1,882.3
Post-hedge, post-fixed interest rate | 2.70% | 2.20%
Post-hedge, post-fixed interest rate, amount | R$ 555.2 | R$ 565.7
Pre-hedge, pre-set interest rate | 3.80% | 6.00%
Pre-hedge, pre-set interest rate, amount | R$ 22.9 | R$ 11.6
Post-hedge, pre-set interest rate | 3.80% | 6.00%
Post-hedge, pre-set interest rate, amount | R$ 22.9 | R$ 1.8
Interest rate risk, Canadian Dollar [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, post-fixed interest rate | 2.00% | 1.60%
Pre-hedge, post-fixed interest rate, amount | R$ 685.9 | R$ 1,259.1
Post-hedge, post-fixed interest rate | 2.00% | 1.60%
Post-hedge, post-fixed interest rate, amount | R$ 685.9 | R$ 1,259.1
Interest rate risk, Barbadian Dollar [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, post-fixed interest rate | 2.30% | 2.70%
Pre-hedge, post-fixed interest rate, amount | R$ 5.0 | R$ 4.9
Post-hedge, post-fixed interest rate | 2.30% | 2.70%
Post-hedge, post-fixed interest rate, amount | R$ 5.0 | R$ 4.9
Pre-hedge, pre-set interest rate |  | 4.30%
Pre-hedge, pre-set interest rate, amount |  | R$ 48.5
Post-hedge, pre-set interest rate |  | 4.30%
Post-hedge, pre-set interest rate, amount |  | R$ 48.5
Interest rate risk [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, post-fixed interest rate |  |
Pre-hedge, post-fixed interest rate, amount | R$ 1,648.5 | R$ 3,814.0
Post-hedge, post-fixed interest rate |  |
Post-hedge, post-fixed interest rate, amount | R$ 1,960.2 | R$ 4,205.3
Pre-hedge, pre-set interest rate |  |
Pre-hedge, pre-set interest rate, amount | R$ 906.3 | R$ 1,582.3
Post-hedge, pre-set interest rate |  |
Post-hedge, pre-set interest rate, amount | R$ 594.6 | R$ 1,191.0
Interest rate risk, Argentinean Peso [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, pre-set interest rate | 31.00% |
Pre-hedge, pre-set interest rate, amount | R$ 1.8 |
Post-hedge, pre-set interest rate | 31.00% |
Post-hedge, pre-set interest rate, amount | R$ 1.8 |
Interest rate risk, Dominican Peso [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, pre-set interest rate | 9.30% | 9.70%
Pre-hedge, pre-set interest rate, amount | R$ 188.8 | R$ 288.8
Post-hedge, pre-set interest rate | 9.30% | 9.70%
Post-hedge, pre-set interest rate, amount | R$ 188.8 | R$ 288.8
Interest rate risk, Guatemala´s Quetzal [member] |  |
Statement Line Items [Line Items] |  |
Pre-hedge, pre-set interest rate | 7.80% | 8.00%
Pre-hedge, pre-set interest rate, amount | R$ 10.3 | R$ 9.9
Post-hedge, pre-set interest rate | 7.80% | 8.00%
Post-hedge, pre-set interest rate, amount | R$ 10.3 | R$ 10.0

X
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