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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Obligation under the Labor Law (Details) - IDR (Rp) Rp in Billions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of defined benefit plans [line items]
Post-employment benefit expense, defined benefit plans	Rp 1,680	Rp 1,449	Rp 1,176
Amount recognised in other comprehensive income before tax adjustment	2,168	(4,455)	(2,520)
Obligation under the Labor Law
Disclosure of defined benefit plans [line items]
Net defined benefit liability (asset)	926	777
Post-employment benefit expense, defined benefit plans	254	258	136
Amount recognised in other comprehensive income before tax adjustment	Rp 42	Rp 125	Rp (107)

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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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
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- Definition

The amount of other comprehensive income, before tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income]

+ References

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- Definition

The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [member]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss]

+ References

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