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Derivative Instruments and Accounting Hedges (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Accounting Hedges |
Schedule of Bank's portfolio of derivative instruments |
|  | As of December 31, 2017
|  | Notional |  |  |  |
|  | amount |  | Fair value
|  | contract |  | Asset |  | Liability
|  | MCh$ |  | MCh$ |  | MCh$
Derivatives held for hedging of fair value |  |  |  |  |  |
Cross currency swap |  | 13,914 |  | — |  | 3,652
Interest rate swap |  | 78,970 |  | 277 |  | 1,678
Total derivatives held for hedging purposes |  | 92,884 |  | 277 |  | 5,330
Derivatives held as cash flow hedges |  |  |  |  |  |
Interest rate swap and cross currency swap |  | 1,148,561 |  | 27,572 |  | 80,888
Total Derivatives held as cash flow hedges |  | 1,148,561 |  | 27,572 |  | 80,888
Derivatives held-for-trading purposes |  |  |  |  |  |
Currency forward |  | 29,451,333 |  | 506,614 |  | 574,931
Interest rate forward |  | 14,000 |  | ― |  | 206
Interest rate swap |  | 55,617,104 |  | 243,931 |  | 236,954
Cross currency swap |  | 11,281,240 |  | 466,192 |  | 490,811
Call currency options |  | 153,776 |  | 514 |  | 472
Put currency options |  | 145,873 |  | 2,841 |  | 3,403
Total derivatives held-for-trading purposes |  | 96,663,326 |  | 1,220,092 |  | 1,306,777
Total |  | 97,904,771 |  | 1,247,941 |  | 1,392,995
|  | As of December 31, 2018
|  | Notional |  |  |  |
|  | amount |  | Fair value
|  | contract |  | Asset |  | Liability
|  | MCh$ |  | MCh$ |  | MCh$
Derivatives held for hedging of fair value |  |  |  |  |  |
Cross currency swap |  | 11,132 |  | — |  | 3,012
Interest rate swap |  | 226,954 |  | 1,116 |  | 3,152
Total derivatives held for hedging purposes |  | 238,086 |  | 1,116 |  | 6,164
Derivatives held as cash flow hedges |  |  |  |  |  |
Interest rate swap and cross currency swap |  | 1,137,457 |  | 34,298 |  | 31,818
Total Derivatives held as cash flow hedges |  | 1,137,457 |  | 34,298 |  | 31,818
Derivatives held-for-trading purposes |  |  |  |  |  |
Currency forward |  | 35,690,464 |  | 735,444 |  | 631,089
Interest rate forward |  | ― |  | ― |  | ―
Interest rate swap |  | 72,330,827 |  | 287,611 |  | 284,840
Cross currency swap |  | 13,982,890 |  | 450,519 |  | 569,868
Call currency options |  | 229,175 |  | 4,839 |  | 2,921
Put currency options |  | 192,553 |  | 120 |  | 1,534
Total derivatives held-for-trading purposes |  | 122,425,909 |  | 1,478,533 |  | 1,490,252
Total |  | 123,801,452 |  | 1,513,947 |  | 1,528,234
Schedule of Details of the Hedged elements and hedge instruments under fair value hedges |
|  | As of December 31,
|  | 2017 |  | 2018
|  | MCh$ |  | MCh$
Notional Amounts |  |  |  |
Hedged element |  |  |  |
Commercial loans |  | 13,914 |  | 11,132
Corporate bonds |  | 78,970 |  | 226,954
Hedge instrument |  |  |  |
Cross currency swap |  | 13,914 |  | 11,132
Interest rate swap |  | 78,970 |  | 226,954
Schedule of cash flows of borrowings from banks and bonds issued abroad, the objects of these hedges and the cash flows of the asset part of the derivative |
|  |  |  |  |  | Over 1 month |  | Over 3 months |  | Over 1 year |  | Over 3 years |  |  |  |  |  |  |  |
|  |  |  |  |  | and up to 3 |  | and up to 12 |  | and up to 3 |  | and up to 5 |  |  |  |  |  |  |  |
|  | Up to 1 month |  | months |  | months |  | years |  | years |  | Over 5 years |  | Total
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018
|  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$
Hedge element |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outflows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate Bond EUR |  | — |  | — |  | — |  | — |  | (1,246) |  | (1,338) |  | (2,491) |  | (2,675) |  | (2,491) |  | (2,675) |  | (82,348) |  | (87,097) |  | (88,576) |  | (93,785)
Corporate Bond HKD |  | — |  | — |  | — |  | — |  | (11,052) |  | (66,378) |  | (68,634) |  | (21,601) |  | (19,202) |  | (83,608) |  | (298,776) |  | (263,206) |  | (397,664) |  | (434,793)
Corporate Bond CHF |  | — |  | — |  | (986) |  | (89,256) |  | (161,529) |  | (125,993) |  | (192,519) |  | (1,450) |  | (474) |  | (82,552) |  | (95,174) |  | (106,050) |  | (450,682) |  | (405,301)
Corporate Bond USD |  | — |  | — |  | — |  | — |  | — |  | (1,476) |  | — |  | (2,952) |  | — |  | (2,952) |  | — |  | (42,060) |  | — |  | (49,440)
Obligation USD |  | (212) |  | (870) |  | (235) |  | (86) |  | (93,173) |  | (49,401) |  | (43,385) |  | (105,622) |  | — |  | — |  | — |  | — |  | (137,005) |  | (155,979)
Corporate Bond JPY |  | — |  | — |  | (292) |  | (49,362) |  | (1,150) |  | (1,072) |  | (72,098) |  | (33,487) |  | (28,886) |  | (32,882) |  | (63,002) |  | (71,830) |  | (165,428) |  | (188,633)
Hedge instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inflows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cross Currency Swap EUR |  | — |  | — |  | — |  | — |  | 1,246 |  | 1,338 |  | 2,491 |  | 2,675 |  | 2,491 |  | 2,675 |  | 82,348 |  | 87,097 |  | 88,576 |  | 93,785
Cross Currency Swap HKD |  | — |  | — |  | — |  | — |  | 11,052 |  | 66,378 |  | 68,634 |  | 21,601 |  | 19,202 |  | 83,608 |  | 298,776 |  | 263,206 |  | 397,664 |  | 434,793
Cross Currency Swap CHF |  | — |  | — |  | 986 |  | 89,256 |  | 161,529 |  | 125,993 |  | 192,519 |  | 1,450 |  | 474 |  | 82,552 |  | 95,174 |  | 106,050 |  | 450,682 |  | 405,301
Cross Currency Swap USD |  | — |  | — |  | — |  | — |  | — |  | 1,476 |  | — |  | 2,952 |  | — |  | 2,952 |  | — |  | 42,060 |  | — |  | 49,440
Cross Currency Swap USD |  | 212 |  | 870 |  | 235 |  | 86 |  | 93,173 |  | 49,401 |  | 43,385 |  | 105,622 |  | — |  | — |  | — |  | — |  | 137,005 |  | 155,979
Cross Currency Swap JPY |  | — |  | — |  | 292 |  | 49,362 |  | 1,150 |  | 1,072 |  | 72,098 |  | 33,487 |  | 28,886 |  | 32,882 |  | 63,002 |  | 71,830 |  | 165,428 |  | 188,633
Net cash flows |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | —
Schedule of cash flows of the underlying assets portfolio and the cash flow of the liability |
|  |  |  |  |  | Over 1 month |  | Over 3 months |  | Over 1 year |  | Over 3 years |  |  |  |  |  |  |  |
|  |  |  |  |  | and up to 3 |  | and up to 12 |  | and up to 3 |  | and up to 5 |  |  |  |  |  |  |  |
|  | Up to 1 month |  | months |  | months |  | years |  | years |  | Over 5 years |  | Total
|  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018
|  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$ |  | MCh$
Hedge element |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inflows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flows in CLF |  | — |  | — |  | 2,344 |  | 144,458 |  | 281,377 |  | 237,340 |  | 414,764 |  | 173,263 |  | 59,737 |  | 195,590 |  | 555,461 |  | 542,523 |  | 1,313,683 |  | 1,293,174
Hedge instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outflows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cross Currency Swap HKD |  | — |  | — |  | — |  | — |  | (9,404) |  | (59,667) |  | (66,188) |  | (16,835) |  | (16,365) |  | (68,362) |  | (285,066) |  | (233,286) |  | (377,023) |  | (378,150)
Cross Currency Swap JPY |  | — |  | — |  | (1,061) |  | (50,247) |  | (3,372) |  | (2,740) |  | (85,598) |  | (37,432) |  | (35,063) |  | (35,213) |  | (77,895) |  | (78,611) |  | (202,989) |  | (204,243)
Cross Currency Swap USD |  | — |  | — |  | — |  | — |  | (111,077) |  | (47,797) |  | (44,840) |  | (107,893) |  | — |  | (1,243) |  | — |  | (36,888) |  | (155,917) |  | (193,821)
Cross Currency Swap CHF |  | — |  | — |  | (1,283) |  | (94,211) |  | (155,767) |  | (125,325) |  | (214,620) |  | (7,482) |  | (4,793) |  | (87,164) |  | (107,870) |  | (108,488) |  | (484,333) |  | (422,670)
Cross Currency Swap EUR |  | — |  | — |  | — |  | — |  | (1,757) |  | (1,811) |  | (3,518) |  | (3,621) |  | (3,516) |  | (3,608) |  | (84,630) |  | (85,250) |  | (93,421) |  | (94,290)
Net cash flows |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | —

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