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INCOME TAX 5 (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance at beginning of year | $ 1,089 | $ 947 | $ 877
Gross increases related to current period tax positions | 51 | 370 | 94
Gross increases related to prior periods tax positions | 83 | 82 | 153
Gross decreases related to prior periods tax positions | (34) | (201) | (91)
Decrease related to resolutions of audits with tax authorities | (3) | (40) | (76)
Expiration of the statue of limitations for the assessment of taxes | (13) | (50) | (54)
Foreign currency translation | (9) | (19) | 44
Balance at end of year | $ 1,164 | $ 1,089 | $ 947

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