XML 180 R166.htm IDEA: XBRL DOCUMENT v3.8.0.1
PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Additional pension benefit cost (Details) - Additional pension benefit obligation
Rp in Billions
12 Months Ended
Dec. 31, 2017
IDR (Rp)
Disclosure of net defined benefit liability (asset) [line items]  
Past service cost Rp 657
Actuarial loss recognized in OCI (419)
Pension benefit obligations at end of year Rp 1,076