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INVENTORIES - Provision for obsolescence (Details) $ in Millions, Rp in Billions | 12 Months Ended
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Dec. 31, 2021 IDR (Rp) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 IDR (Rp) | Dec. 31, 2019 IDR (Rp)
Provision for obsolescence |  |  |  |
Beginning balance | Rp (983) |  |  |
Ending balance | (779) | $ (55) | Rp (983) |
Inventory recognized as expense | 739 |  | 544 | Rp 1,754
Inventories pledged as security for liabilities | 557 |  | 557 |
Modules and components | 122 |  | 107 |
Modules and components, insured amount | 155 |  | 133 |
Allowance for expected credit losses |  |  |  |
Provision for obsolescence |  |  |  |
Beginning balance | 68 |  | 92 |
Provision recognised during the year | 2 |  | 1 |
Inventory written off | (1) |  | (25) |
Ending balance | Rp 69 |  | Rp 68 | Rp 92

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- Definition The amount of inventories pledged as security for liabilities. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2021-01-01 -Paragraph 36 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2021-en-r&anchor=para_36_h&doctype=Standard -URIDate 2021-03-24 + Details
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