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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Health Care - Components (Details)
$ in Millions, Rp in Billions
 12 Months Ended
Dec. 31, 2022
IDR (Rp)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
IDR (Rp)
Dec. 31, 2020
IDR (Rp)
Disclosure of net defined benefit liability (asset) [line items]        
Net periodic pension benefit cost Rp 1,585   Rp 1,680 Rp 1,449
Defined benefit plan actuarial gain (loss) - net of tax (1,464) $ (94) (1,955) 3,596
Post-employment health care benefit cost        
Disclosure of net defined benefit liability (asset) [line items]        
Net periodic pension benefit cost Rp 213   Rp 263 Rp 253