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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Plan Details (Details) - IDR (Rp) Rp in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 07, 2017 | Jan. 01, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of defined benefit plans [line items] |  |  |  |  |
Prepaid pension benefit cost at beginning of the year |  |  |  | Rp 199,000 |
(Projected pension benefit obligation) prepaid pension benefit cost at end of year |  |  |  |  | Rp 199,000
Pension benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Prepaid pension benefit cost at beginning of the year |  |  |  | Rp 199,000 |
(Projected pension benefit obligation) prepaid pension benefit cost at end of year |  |  |  |  | Rp 199,000
The company | Funded pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Percentage of companies share in total plan assets |  |  |  | 2.25% | 2.07%
Percentage of Debt Instruments Contributed to Fair Value of Plan Assets |  |  |  | 1.64% | 1.63%
Actual return on plan asset |  |  |  | Rp 3,039,000 | Rp 2,600,000
Minimum FSR required for non contribution to fund |  |  |  | 105.00% |
Funding sufficiency ratio |  |  |  | 105.00% |
Percentage of pension benefits provided |  | 75.00% | 60.00% |  |
Prepaid pension benefit cost at beginning of the year |  | Rp 1,329,000 |  | Rp 197,000 | 1,329,000
Net periodic pension benefit cost |  |  |  | (583,000) | (640,000)
Actuarial gain (losses) recognized in OCI |  |  |  | (2,862,000) | (1,680,000)
Return on plan assets (excluding amount included in net interest expense) |  |  |  | 1,708,000 | 1,188,000
(Projected pension benefit obligation) prepaid pension benefit cost at end of year |  |  | Rp 1,329,000 | (1,540,000) | 197,000
The company | Funded pension | Series B shares |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Equity instruments |  |  |  | 469,000 | 395,000
The company | Funded pension | Corporate bonds |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Debt instruments |  |  |  | 340,000 | Rp 311,000
The company | Retired before end of June 2002 | Funded pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
One time benefits paid | Rp 4,500 |  |  | 6,000 |
The company | Retired starting from end of June 2002 until end of May 2016 | Funded pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
One time benefits paid |  |  |  | 3,000 |
The company | Retired starting from end of June 2002 until end of April 2017 | Funded pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
One time benefits paid |  |  |  | Rp 2,250 |

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- Definition The amount that instruments representing debt (rather than equity) constitute of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 142 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_142_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount that instruments representing equity (rather than debt) constitute of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 142 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_142_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets. The return on plans assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_i&doctype=Standard -URIDate 2017-03-09 + Details
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