PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Obligation under the Labor Law (Details) - IDR (Rp) Rp in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [line items]
Post-employment benefit expense, defined benefit plans	Rp 2,080,000	Rp 1,361,000	Rp 759,000
Amount recognized in other comprehensive income before tax adjustment	(2,869,000)	(2,266,000)	309,000
Other employee benefit cost
Disclosure of defined benefit plans [line items]
Net defined benefit liability (asset)	427,000	332,000
Post-employment benefit expense, defined benefit plans	62,000	82,000	53,000
Amount recognized in other comprehensive income before tax adjustment	Rp (72,000)	Rp (33,000)	Rp (48,000)

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.

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

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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, before tax; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)]

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- Definition

The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]]

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