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Risk Management - Collateral and Other Enhancements (Details) $ in Millions | Dec. 31, 2018 CLP ($) item | Dec. 31, 2017 CLP ($)
--- | --- | ---
Guarantee values |  |
Number of collateral assets | item | 225,191 |
Fair value of loans covered by collateral |  |
Value of guarantees, classified as impaired | $ 85,721 | $ 102,014
Value of guarantees, classified as non-impaired | 295,634 | 358,967
Loans to customers |  |
Guarantee values |  |
Maximum exposure to credit risk | 27,926,632 | 25,451,513
Fair value of loans covered by collateral |  |
Mortgages | 13,391,818 | 12,018,604
Pledge | 107,400 | 102,620
Securities | 455,039 | 472,672
Warrants | 2,263 | 3,381
Others | 313,149 | 320,810
Net collateral | 14,269,669 | 12,918,087
Net exposure | 13,656,963 | 12,533,426
Corporate lending |  |
Guarantee values |  |
Maximum exposure to credit risk | 11,705,859 | 9,775,740
Fair value of loans covered by collateral |  |
Mortgages | 2,589,429 | 2,269,716
Pledge | 75,105 | 72,893
Securities | 423,556 | 438,595
Warrants | 2,263 | 3,381
Others | 221,919 | 243,961
Net collateral | 3,312,272 | 3,028,546
Net exposure | 8,393,587 | 6,747,194
Small business loans |  |
Guarantee values |  |
Maximum exposure to credit risk | 3,732,539 | 4,185,078
Fair value of loans covered by collateral |  |
Mortgages | 2,977,286 | 2,543,343
Pledge | 31,270 | 28,699
Securities | 28,974 | 32,034
Others | 71,140 | 58,255
Net collateral | 3,108,670 | 2,662,331
Net exposure | 623,869 | 1,522,747
Consumer loans |  |
Guarantee values |  |
Maximum exposure to credit risk | 4,436,161 | 4,013,459
Fair value of loans covered by collateral |  |
Mortgages | 332,030 | 283,091
Pledge | 967 | 938
Securities | 2,244 | 1,776
Others | 20,090 | 18,594
Net collateral | 355,331 | 304,399
Net exposure | 4,080,830 | 3,709,060
Mortgage loans |  |
Guarantee values |  |
Maximum exposure to credit risk | 8,052,073 | 7,477,236
Fair value of loans covered by collateral |  |
Mortgages | 7,493,073 | 6,922,454
Pledge | 58 | 90
Securities | 265 | 267
Net collateral | 7,493,396 | 6,922,811
Net exposure | $ 558,677 | $ 554,425

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