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Risk Management (Details 32) - Prudential - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Risk-weighted assets (RWA)    
Credit risk R$ 554,928,771 R$ 589,977,243
Risk Weight of 0% 0 0
Risk Weight of 2% 314,012 271,970
Risk Weight of 20% 2,224,147 10,725,736
Risk Weight of 35% 10,208,602 9,114,590
Risk Weight of 50% 25,635,506 32,434,787
Risk Weight of 75% 114,553,059 117,017,519
Risk Weight of 85% 105,938,759 144,006,730
Risk Weight of 100% 261,909,360 239,369,280
Risk Weight of 250% 28,139,531 27,655,131
Risk Weight of 300% 2,920,531 6,825,567
Risk Weight up to 1,250% 3,085,264 2,555,933
Market risk [1] 8,908,205 15,767,767
Fixed-rate in Reais 5,696,584 10,537,134
Foreign Currency Coupon 838,259 7,028,051
Price Index Coupon 1,756,973 342,400
Interest Rate Coupon   13,499
Equities 637,924 67,392
Commodities 449,546 32,466
Exposure to Gold, Foreign Currencies and Exchange 3,657,957 4,194,380
Operational risk 47,605,162 50,443,507
Corporate Finance 1,369,491 1,380,459
Trading and Sales 1,667,449 2,866,659
Retail 9,308,681 8,349,268
Commercial 21,518,843 20,699,277
Payment and Settlement 6,132,749 10,143,694
Financial Agent Services 3,628,257 3,465,556
Asset Management 3,827,848 3,392,327
Retail Brokerage 151,844 146,266
Total Risk Weighted Assets 611,442,138 656,188,517
Total Capital Requirement 56,558,398 64,798,616
Banking Portfolio's Interest Rate Risk 3,527,467 4,142,339
Addicional Common equity (ACPS) [2] 9,171,632 4,101,178
ACP Conservation 7,643,027 4,101,178
ACP Systemic R$ 1,528,605 R$ 0
[1] For purposes of calculation of the market risk, the capital requirement will be the lower between the internal model and 80% of the standard model, pursuant to Circular Letter No. 3.646/13 of Central Bank of Brazil; and
[2] In 2017, the value of ACP Conservation represents 1.25% of the amount of RWA. The Systemic ACP represents 0.25% of the amount of RWA (Systemic Relevance Factor determined according to Circular Letter No. 3.768 of the CBB - Total Exposure and GDP of the year before last in relation to the base date: R$ 988.5 billion and R$ 6 trillion, respectively. The contracyclical ACP represents 0% of the amount of RWA, pursuant to Communication No. 31.478 of the CBB with disclosure and effectiveness in December/17, where the RWA of the loan risk to the non-banking private sector (RWACPrNB) is R$ 496.2 billion in Brazil.