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Debt Issued - Current Bonds Long-Term December 31, 2019 (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
CLP ($)
BCHIEC0817 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 83,470
Terms Years 5 years
Annual issue rate 1.55%
Issue date Jan. 30, 2019
Maturity date Jan. 30, 2024
BCHIED1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 41,711
Terms Years 5 years
Annual issue rate 1.54%
Issue date Mar. 14, 2019
Maturity date Mar. 14, 2024
BCHIED1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 5,587
Terms Years 5 years
Annual issue rate 1.45%
Issue date Mar. 19, 2019
Maturity date Mar. 19, 2024
BCHIED1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 36,317
Terms Years 5 years
Annual issue rate 1.45%
Issue date Mar. 20, 2019
Maturity date Mar. 20, 2024
BCHIDW1017 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 84,359
Terms Years 2 years
Annual issue rate 0.93%
Issue date May 09, 2021
Maturity date May 09, 2021
BCHIDW1017 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 57,091
Terms Years 2 years
Annual issue rate 0.57%
Issue date Jun. 24, 2019
Maturity date Jun. 24, 2021
BCHIEH0917 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 58,867
Terms Years 7 years
Annual issue rate 1.04%
Issue date Jan. 07, 2019
Maturity date Jul. 01, 2026
BCHIEB1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 86,682
Terms Years 4 years
Annual issue rate 0.83%
Issue date Jan. 07, 2019
Maturity date Jul. 01, 2026
BCHIEH0917 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 29,514
Terms Years 7 years
Annual issue rate 1.00%
Issue date Feb. 07, 2019
Maturity date Jul. 02, 2026
BCHIEI1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 60,697
Terms Years 7 years
Annual issue rate 0.66%
Issue date Jul. 19, 2019
Maturity date Jul. 19, 2026
BCHIEI1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 22,063
Terms Years 7 years
Annual issue rate 0.51%
Issue date Jul. 30, 2019
Maturity date Jul. 30, 2026
BCHIEI1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 8,613
Terms Years 7 years
Annual issue rate 0.45%
Issue date Aug. 01, 2026
Maturity date Aug. 01, 2026
BCHICC0815 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 71,703
Terms Years 12 years
Annual issue rate 0.54%
Issue date May 08, 2019
Maturity date Aug. 05, 2031
BCHICA1015 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 71,221
Terms Years 11 years
Annual issue rate 0.54%
Issue date May 08, 2019
Maturity date May 08, 2030
BCHICB1215 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 14,496
Terms Years 11 years
Annual issue rate 0.44%
Issue date Jul. 08, 2019
Maturity date Aug. 07, 2030
BCHIEI1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 7,764
Terms Years 7 years
Annual issue rate 0.30%
Issue date Jul. 08, 2019
Maturity date Jul. 08, 2026
BCHIEI1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 20,212
Terms Years 7 years
Annual issue rate 0.28%
Issue date Aug. 08, 2019
Maturity date Aug. 08, 2026
BCHICB1215 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 57,926
Terms Years 11 years
Annual issue rate 0.45%
Issue date Aug. 08, 2019
Maturity date Aug. 08, 2030
BCHIEI1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 3,108
Terms Years 7 years
Annual issue rate 0.29%
Issue date Aug. 08, 2019
Maturity date Aug. 08, 2026
BCHIBV1015 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 71,063
Terms Years 10 years
Annual issue rate 0.37%
Issue date Aug. 20, 2019
Maturity date Aug. 20, 2029
BCHIEV1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 132,366
Terms Years 10 years
Annual issue rate 0.34%
Issue date May 09, 2019
Maturity date May 09, 2029
BCHIEK1117 [Member]  
Statement Line Items [Line Items]  
Currency UF
Amount $ 117,493
Terms Years 13 years
Annual issue rate 1.38%
Issue date Nov. 12, 2019
Maturity date Nov. 12, 2032
Subtotal UF [Member]  
Statement Line Items [Line Items]  
Amount $ 1,142,323
BONO JPY [Member]  
Statement Line Items [Line Items]  
Currency JPY
Amount $ 63,041
Terms Years 20 years
Annual issue rate 1.00%
Issue date May 14, 2019
Maturity date May 14, 2039
BONO HKD [Member]  
Statement Line Items [Line Items]  
Currency HKD
Amount $ 32,725
Terms Years 12 years
Annual issue rate 2.90%
Issue date Jul. 19, 2019
Maturity date Jul. 19, 2031
BONO AUD [Member]  
Statement Line Items [Line Items]  
Currency AUD
Amount $ 36,519
Terms Years 20 years
Annual issue rate 3.50%
Issue date Aug. 28, 2019
Maturity date Aug. 28, 2039
BONO PEN [Member]  
Statement Line Items [Line Items]  
Currency PEN
Amount $ 29,969
Terms Years 15 years
Annual issue rate 5.40%
Issue date Apr. 09, 2019
Maturity date Apr. 09, 2034
BONO AUD [Member]  
Statement Line Items [Line Items]  
Currency AUD
Amount $ 24,547
Terms Years 15 years
Annual issue rate 3.13%
Issue date Sep. 09, 2019
Maturity date Sep. 09, 2034
BONO NOK [Member]  
Statement Line Items [Line Items]  
Currency NOK
Amount $ 60,951
Terms Years 10 years
Annual issue rate 3.50%
Issue date Jul. 11, 2019
Maturity date Jul. 11, 2029
BONO AUD [Member]  
Statement Line Items [Line Items]  
Currency AUD
Amount $ 39,067
Terms Years 20 years
Annual issue rate 3.55%
Issue date Nov. 11, 2019
Maturity date Nov. 11, 2039
BONO JPY [Member]  
Statement Line Items [Line Items]  
Currency JPY
Amount $ 36,264
Terms Years 10 years
Annual issue rate 1.00%
Issue date Nov. 19, 2019
Maturity date Nov. 19, 2029
Subtotal Others currency [Member]  
Statement Line Items [Line Items]  
Amount $ 323,083
Total currency [Member]  
Statement Line Items [Line Items]  
Amount $ 1,465,406