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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, 2017 | Dec. 31, 2016
Changes in present value of defined benefit obligation |  |
Opening defined benefit obligation, January 1, | $ 8,851 |
Closing defined benefit obligation | 7,676 | $ 8,851
Changes in provisions for incentive plans |  |
Balances as of January 1, | 37,868 | 34,307
Provisions established | 36,171 | 37,339
Provisions used | (32,311) | (33,778)
Balances as of December 31, | 41,728 | 37,868
Changes in provisions for vacation |  |
Balances as of January 1, | 25,539 | 25,480
Provisions established | 5,626 | 5,932
Provisions used | (6,006) | (5,873)
Balances as of December 31, | 25,159 | 25,539
Staff Severance Indemnities Plan |  |
Changes in present value of defined benefit obligation |  |
Opening defined benefit obligation, January 1, | 8,851 | 10,728
Contributions by the employer | 257 | 428
Benefits paid | (1,268) | (2,136)
Actuarial gains and losses | (164) | (169)
Closing defined benefit obligation | $ 7,676 | $ 8,851

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- Definition The amount of vacation provisions used. + References No definition available. + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_g&doctype=Standard -URIDate 2017-03-09 + Details
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