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OTHER CURRENT FINANCIAL ASSETS - Schedule of interest rates on maturities of time deposits (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Rupiah
OTHER CURRENT FINANCIAL ASSETS
Interest rate of time deposits with maturities greater than three months		6.50%
Minimum | Rupiah
OTHER CURRENT FINANCIAL ASSETS
Interest rate of time deposits with maturities greater than three months	3.25%
Minimum | Foreign currency
OTHER CURRENT FINANCIAL ASSETS
Interest rate of time deposits with maturities greater than three months	0.15%	1.20%
Maximum | Rupiah
OTHER CURRENT FINANCIAL ASSETS
Interest rate of time deposits with maturities greater than three months	6.50%
Maximum | Foreign currency
OTHER CURRENT FINANCIAL ASSETS
Interest rate of time deposits with maturities greater than three months	1.08%	2.51%

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The interest rate on time deposits that have maturities of more than three months but not more than one year, and are not classified as cash equivalents.

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