PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Health Care - Movements of Projected Benefit Obligation (Details) - IDR (Rp) Rp in Billions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Disclosure of net defined benefit liability (asset) [line items]
Pension benefit obligations at beginning of year	Rp 8,509	Rp 9,717
Return on plan assets (excluding amount included in net interest expense)	537	(82)
Pension benefit obligations at end of year	Rp 9,862	Rp 8,509

The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan 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]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 141
-Subparagraph c
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_i&doctype=Standard
-URIDate 2023-03-23

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration