Note 14 - Accumulated Other Comprehensive Loss - Reclassification Details (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||||||||||||||||||
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Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1],[2] | $ (3) | $ (3) | $ (8) | $ (9) | |||||||||||||||||||||
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1],[2] | (3) | (3) | (8) | (9) | |||||||||||||||||||||
Accumulated Defined Benefit Plans Adjustment, Actuarial Gain (Loss), Including Portion Attributable to Noncontrolling Interest [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1] | 23 | [3] | 21 | [3] | 70 | [2],[4] | 61 | [2],[4] | |||||||||||||||||
Accumulated Defined Benefit Plans Adjustment, Actuarial Gain (Loss), Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1] | 24 | [3] | 22 | [3] | 72 | [2],[4] | 63 | [2],[4] | |||||||||||||||||
Accumulated Defined Benefit Plans Adjustment, Settlement Gain (Loss), Including Portion Attributable to Noncontrolling Interest 1 [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1],[3] | 3 | 41 | |||||||||||||||||||||||
Accumulated Defined Benefit Plans Adjustment, Settlement Gain (Loss), Including Portion Attributable to Noncontrolling Interest 1 [Member] | Huntsman International LLC [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1],[3] | 3 | 41 | |||||||||||||||||||||||
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1] | 20 | 18 | 65 | [5],[6] | 93 | [6],[7] | |||||||||||||||||||
Tax expense | [1] | (3) | (4) | (13) | [5] | (21) | [7] | |||||||||||||||||||
Total reclassifications for the period | [1] | 17 | 14 | 52 | 72 | |||||||||||||||||||||
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member] | ||||||||||||||||||||||||||
Amounts reclassified from accumulated other comprehensive loss, gross | [1] | 21 | 19 | 67 | [6],[8] | 95 | [6],[9] | |||||||||||||||||||
Tax expense | [1] | (4) | (4) | (14) | [8] | (21) | [9] | |||||||||||||||||||
Total reclassifications for the period | [1] | $ 17 | $ 15 | $ 53 | $ 74 | |||||||||||||||||||||
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