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Note 21 - Changes in Equity - Carrying Value Adjustments (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |
Balance | R$ 46,651.3 | R$ 50,333.7 | R$ 43,644.7
Gains/(losses) on translation of foreign operations | 1,952.3 | (4,127.7) | 3,414.2
Cash flow hedges | 513.7 | (1,073.3) | 664.6
Actuarial gain/(losses) | 124.6 | (129.6) | (24.5)
Total comprehensive income | 10,441.1 | 7,752.8 | 16,933.5
Options granted on subsidiary | (380.4) | (144.1) | (189.4)
Gains/(losses) of controlling interest´s share | 17.4 | 34.8 | 5.6
Exchange transaction of shareholdings |  | (3.1) |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends | (38.7) |  |
Balance | 47,982.8 | 46,651.3 | 50,333.7
Carrying value adjustments, translation reserves [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | (289.5) | 3,472.2 |
Gains/(losses) on translation of foreign operations | 1,928.6 | (3,728.7) |
Cash flow hedges |  |  |
Actuarial gain/(losses) |  |  |
Total comprehensive income | 1,928.6 | (3,728.7) |
Options granted on subsidiary |  |  |
Gains/(losses) of controlling interest´s share |  |  |
Exchange transaction of shareholdings |  | (33.0) |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends |  |  |
Balance | 1,639.1 | (289.5) | 3,472.2
Carrying value adjustments, cash flow hedge [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | (144.5) | 932.2 |
Gains/(losses) on translation of foreign operations |  |  |
Cash flow hedges | 513.4 | (1,076.7) |
Actuarial gain/(losses) |  |  |
Total comprehensive income | 513.4 | (1,076.7) |
Options granted on subsidiary |  |  |
Gains/(losses) of controlling interest´s share |  |  |
Exchange transaction of shareholdings |  |  |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends |  |  |
Balance | 368.9 | (144.5) | 932.2
Carrying value adjustments, actuarial gains/losses [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | (1,262.2) | (1,131.5) |
Gains/(losses) on translation of foreign operations |  |  |
Cash flow hedges |  |  |
Actuarial gain/(losses) | 117.7 | (130.7) |
Total comprehensive income | 117.7 | (130.7) |
Options granted on subsidiary |  |  |
Gains/(losses) of controlling interest´s share |  |  |
Exchange transaction of shareholdings |  |  |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends |  |  |
Balance | (1,144.5) | (1,262.2) | (1,131.5)
Carrying value adjustments, put option granted on subsidiary [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | (2,390.9) | (2,246.7) |
Gains/(losses) on translation of foreign operations |  |  |
Cash flow hedges |  |  |
Actuarial gain/(losses) |  |  |
Total comprehensive income |  |  |
Options granted on subsidiary | (380.4) | (144.2) |
Gains/(losses) of controlling interest´s share |  |  |
Exchange transaction of shareholdings |  |  |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends |  |  |
Balance | (2,771.3) | (2,390.9) | (2,246.7)
Carrying value adjustments, gains/ of non-controlling interest´s share [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | 2,150.7 | 2,123.6 |
Gains/(losses) on translation of foreign operations |  |  |
Cash flow hedges |  |  |
Actuarial gain/(losses) |  |  |
Total comprehensive income |  |  |
Options granted on subsidiary |  |  |
Gains/(losses) of controlling interest´s share | (12.1) | (2.8) |
Exchange transaction of shareholdings |  | 29.9 |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends | (38.7) |  |
Balance | 2,099.9 | 2,150.7 | 2,123.6
Carrying value adjustments, business combination [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | 156.1 | 156.1 |
Gains/(losses) on translation of foreign operations |  |  |
Cash flow hedges |  |  |
Actuarial gain/(losses) |  |  |
Total comprehensive income |  |  |
Options granted on subsidiary |  |  |
Gains/(losses) of controlling interest´s share |  |  |
Exchange transaction of shareholdings |  |  |
Reversal effect of revaluation of fixed assets by predecessor |  |  |
Tax on fictitious dividends |  |  |
Balance | 156.1 | 156.1 | 156.1
Carrying value adjustments, accounting adjustments for transactions between shareholders [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | (75,238.8) | (75,162.9) |
Gains/(losses) on translation of foreign operations |  |  |
Cash flow hedges |  |  |
Actuarial gain/(losses) |  |  |
Total comprehensive income |  |  |
Options granted on subsidiary |  |  |
Gains/(losses) of controlling interest´s share |  |  |
Exchange transaction of shareholdings |  |  |
Reversal effect of revaluation of fixed assets by predecessor | (75.9) | (75.9) |
Tax on fictitious dividends |  |  |
Balance | (75,314.7) | (75,238.8) | (75,162.9)
Carrying value adjustments [member] |  |  |
Statement Line Items [Line Items] |  |  |
Balance | (77,019.1) | (71,857.0) | (75,267.9)
Gains/(losses) on translation of foreign operations | 1,928.6 | (3,728.8) | 3,018.9
Cash flow hedges | 513.4 | (1,076.7) | 666.2
Actuarial gain/(losses) | 117.7 | (130.7) | (22.4)
Total comprehensive income | 2,559.7 | (4,936.2) | 3,662.7
Options granted on subsidiary | (380.4) | (144.1) | (189.4)
Gains/(losses) of controlling interest´s share | (12.1) | (2.8) | 13.5
Exchange transaction of shareholdings |  | (3.1) |
Reversal effect of revaluation of fixed assets by predecessor | (75.9) | (75.9) | (75.9)
Tax on fictitious dividends | (38.7) |  |
Balance | R$ (74,966.5) | R$ (77,019.1) | R$ (71,857.0)

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