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Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | R$ 19,329 | R$ 19,383
Ending balance | 19,719 | 19,329
Cost [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 26,129 | 24,699
Acquisitions | 2,691 | 1,381
Rescissions / derecognition | (253) | (738)
Exchange variation | (341) | 808
Other | 36 | (21)
Ending balance | 28,262 | 26,129
Depreciation and Amortization [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (6,232) | (4,919)
Rescissions / derecognition | 188 | 703
Exchange variation | 27 | (277)
Other | (86) | 38
Ending balance | (8,002) | (6,232)
Amortization expense | (1,899) | (1,777)
Impairment [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (568) | (397)
Rescissions / derecognition | 58 |
Exchange variation |  | (4)
Ending balance | (541) | (568)
Incresase | (31) | (167)
Goodwill and intangible assets from acquisition [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 11,438 |
Ending balance | 11,158 | 11,438
Goodwill and intangible assets from acquisition [member] | Cost [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 11,464 | 11,162
Acquisitions |  | 8
Rescissions / derecognition | (26) |
Exchange variation | (285) | 560
Other | 5 | (266)
Ending balance | 11,158 | 11,464
Goodwill and intangible assets from acquisition [member] | Depreciation and Amortization [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (26) | (23)
Rescissions / derecognition | R$ 26 |
Other |  | (3)
Ending balance |  | R$ (26)
Association for the promotion and offer of financial products and services [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Annual amortization rates | 8.00% | 8.00%
Beginning balance | R$ 1,662 |
Ending balance | 1,461 | R$ 1,662
Association for the promotion and offer of financial products and services [Member] | Cost [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 2,529 | 2,452
Acquisitions |  | 1
Rescissions / derecognition | (4) | (27)
Exchange variation | 22 | 47
Other | (29) | 56
Ending balance | 2,518 | 2,529
Association for the promotion and offer of financial products and services [Member] | Depreciation and Amortization [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (867) | (647)
Rescissions / derecognition | 4 | 27
Exchange variation | (5) | (141)
Other | 29 | 117
Ending balance | (1,057) | (867)
Amortization expense | R$ (218) | R$ (223)
Software acquired [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Annual amortization rates | 20.00% | 20.00%
Beginning balance | R$ 2,521 |
Ending balance | 2,522 | R$ 2,521
Software acquired [Member] | Cost [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 5,247 | 4,571
Acquisitions | 789 | 646
Rescissions / derecognition | (93) | (312)
Exchange variation | (84) | 205
Other | 40 | 137
Ending balance | 5,899 | 5,247
Software acquired [Member] | Depreciation and Amortization [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (2,501) | (1,998)
Rescissions / derecognition | 28 | 312
Exchange variation | 45 | (152)
Other | (103) | (67)
Ending balance | (3,206) | (2,501)
Amortization expense | (675) | (596)
Software acquired [Member] | Impairment [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (225) | (54)
Rescissions / derecognition | 58 |
Exchange variation |  | (4)
Ending balance | (171) | (225)
Incresase | R$ (4) | R$ (167)
Internally developed software [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Annual amortization rates | 20.00% | 20.00%
Beginning balance | R$ 2,363 |
Ending balance | 2,849 | R$ 2,363
Internally developed software [member] | Cost [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 4,529 | 4,353
Acquisitions | 1,187 | 318
Rescissions / derecognition |  | (189)
Other |  | 47
Ending balance | 5,716 | 4,529
Internally developed software [member] | Depreciation and Amortization [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (1,823) | (1,267)
Rescissions / derecognition |  | 154
Other |  | (13)
Ending balance | (2,497) | (1,823)
Amortization expense | (674) | (697)
Internally developed software [member] | Impairment [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (343) | (343)
Ending balance | (370) | (343)
Incresase | (27) |
Other intangible assets [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | 1,345 |
Ending balance | R$ 1,729 | R$ 1,345
Other intangible assets [member] | Bottom of range [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Annual amortization rates | 10.00% | 10.00%
Other intangible assets [member] | Top of range [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Annual amortization rates | 20.00% | 20.00%
Other intangible assets [member] | Cost [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | R$ 2,360 | R$ 2,161
Acquisitions | 715 | 408
Rescissions / derecognition | (130) | (210)
Exchange variation | 6 | (4)
Other | 20 | 5
Ending balance | 2,971 | 2,360
Other intangible assets [member] | Depreciation and Amortization [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Beginning balance | (1,015) | (984)
Rescissions / derecognition | 130 | 210
Exchange variation | (13) | 16
Other | (12) | 4
Ending balance | (1,242) | (1,015)
Amortization expense | R$ (332) | R$ (261)

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- Definition The increase in intangible assets and goodwill resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2019-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2019-03-27 + Details
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