v3.26.1
Note 14 - Accumulated Other Comprehensive Loss - Reclassification Details (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
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] $ (2) $ (2)
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],[3],[4] (2) (2)
Accumulated Defined Benefit Plans Adjustment, Actuarial Gain (Loss), Including Portion Attributable to Noncontrolling Interest [Member]    
Amounts reclassified from accumulated other comprehensive loss, gross [1],[2],[3] 7 7
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],[3],[4] 7 7
Accumulated Defined Benefit Plans Adjustment, Settlement Gain (Loss), Including Portion Attributable to Noncontrolling Interest [Member]    
Amounts reclassified from accumulated other comprehensive loss, gross [1],[2],[3] 0 (1)
Accumulated Defined Benefit Plans Adjustment, Settlement Gain (Loss), Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member]    
Amounts reclassified from accumulated other comprehensive loss, gross [1],[3],[4] 0 (1)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]    
Amounts reclassified from accumulated other comprehensive loss, gross [1],[2],[6] 5 [5] 4 [7]
Tax impact [1],[2] (1) [5] 0 [7]
Total reclassifications for the period [1],[2] 4 4
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],[4],[6] 5 [8] 4 [9]
Tax impact [1],[4] (1) [8] 0 [9]
Total reclassifications for the period [1],[4] $ 4 $ 4
[1] Details of amounts reclassified from accumulated other comprehensive loss relate only to pension and other postretirement benefits.
[2] Pension and other postretirement benefits amounts in parentheses indicate credits on our condensed consolidated statements of operations.
[3] These accumulated other comprehensive loss components are included in the computation of net periodic pension costs. See “Note 12. Employee Benefit Plans.”
[4] Pension and other postretirement benefits amounts in parentheses indicate credits on our condensed consolidated statements of operations.
[5] Amounts are net of tax of $49 million and $50 million as of March 31, 2026 and January 1, 2026, respectively.
[6] See tables below for details about pension and other postretirement benefits reclassifications.
[7] Amounts are net of tax of $61 million as of both March 31, 2025 and January 1, 2025.
[8] Amounts are net of tax of $73 million and $74 million as of March 31, 2026 and January 1, 2026, respectively.
[9] Amounts are net of tax of $85 million as of both March 31, 2025 and January 1, 2025.