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Principles of Consolidation, Investments in Subsidiaries and Acquisition - Summary of identification of assets and liabilities, intangible assets, not recognized in acquired entity's book (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
Disclosure of detailed information about financial instruments [line items] |  |  |
Intangible assets other than goodwill | R$ 2,369,355 | R$ 2,238,042 | R$ 1,891,636
Adjustments [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Intangible assets other than goodwill | R$ 129,270 |  |
Commercial property rights [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Finite Lived Intangible Asset, Estimated Useful Life | 39 years |  |
Commercial property rights [member] | Adjustments [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Intangible assets other than goodwill | R$ 114,792 |  |
Portfolio and customers' relationship [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Finite Lived Intangible Asset, Estimated Useful Life | 39 years |  |
Portfolio and customers' relationship [member] | Adjustments [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Intangible assets other than goodwill | R$ 14,478 |  |

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