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Employee Benefits - Changes in the present value defined benefit obligation, incentive plans and vacation (Details) - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Changes in present value of defined benefit obligation |  |  |  |
Opening defined benefit obligation, January 1, |  | $ 7,754 | [1] | $ 7,676
Closing defined benefit obligation | [1] | 7,566 |  | 7,754
Changes in provisions for incentive plans |  |  |  |
Balances as of January 1, |  | 47,797 |  | 43,372
Provisions established |  | 45,792 |  | 40,058
Provisions used |  | (42,538) |  | (35,633)
Provisions released |  |  |  |
Balances as of December 31, |  | 51,051 |  | 47,797
Changes in provisions for vacation |  |  |  |
Balances as of January 1, |  | 26,855 |  | 25,159
Provisions established |  | 7,257 |  | 7,529
Provisions used |  | (6,503) |  | (5,833)
Provisions released |  |  |  |
Balances as of December 31, |  | 27,609 |  | 26,855
Staff Severance Indemnities Plan |  |  |  |
Changes in present value of defined benefit obligation |  |  |  |
Opening defined benefit obligation, January 1, |  |  |  | 7,676
Increase (Decrease) in provision |  | 323 |  | 550
Benefits paid |  | (758) |  | (599)
Actuarial gains and losses |  | $ 247 |  | 127
Closing defined benefit obligation |  |  |  |
[1] | See Note No. 2 (x) (iii).

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