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TREASURY STOCK - Movements in treasury stock (Details) $ in Millions, Rp in Billions | 12 Months Ended
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Dec. 31, 2017 USD ($) shares | Dec. 31, 2017 IDR (Rp) shares | Dec. 31, 2016 IDR (Rp) shares
Number of shares |  |  |
Beginning balance, Shares | 1,737,779,800 | 1,737,779,800 | 2,601,779,800
Sale of treasury stock, Shares |  |  | (864,000,000)
Ending balance, Shares | 1,737,779,800 | 1,737,779,800 | 1,737,779,800
Treasury stock, Percentage |  |  |
Beginning balance, Percentage | 1.72% | 1.72% | 2.58%
Sale of treasury stock, Percentage |  |  | (0.86%)
Ending balance, Percentage | 1.72% | 1.72% | 1.72%
Treasury stock, Value |  |  |
Beginning balance, Value | Rp |  | Rp 2,541 | Rp 3,804
Sale of treasury stock, Value | Rp |  |  | (1,263)
Ending balance, Value | $ 187 | Rp 2,541 | Rp 2,541

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