Annual report [Section 13 and 15(d), not S-K Item 405]

Note 25 - Accumulated Other Comprehensive Loss - Components and Changes in Accumulated Other Comprehensive Loss (Details)

v3.25.4
Note 25 - Accumulated Other Comprehensive Loss - Components and Changes in Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Balance $ 3,163 $ 3,478 $ 3,840
Other comprehensive income, net of tax 198 46 20
Balance 2,957 3,163 3,478
Huntsman International LLC [Member]      
Balance 3,170 3,491 3,852
Other comprehensive income, net of tax 199 46 20
Balance 2,964 3,170 3,491
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]      
Balance [2] (675) [1] (614)  
Other comprehensive income before reclassifications, gross 124 [1] (66) [2]  
Tax impact 8 [1] (4) [2]  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 0 [1] 9 [2]  
Tax impact 0 [1] 0 [2]  
Other comprehensive income, net of tax 132 [1] (61) [2]  
Balance (543) [1] (675) [1],[2] (614) [2]
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member]      
Balance [5] (680) [4] (619)  
Other comprehensive income before reclassifications, gross 125 [4] (66) [5]  
Tax impact 8 [4] (4) [5]  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 0 [4] 9 [5]  
Tax impact 0 [4] 0 [5]  
Other comprehensive income, net of tax 133 [4] (61) [5]  
Balance (547) [4] (680) [4],[5] (619) [5]
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]      
Balance [7],[8] (552) [6] (656)  
Other comprehensive income before reclassifications, gross 49 [6] 80 [7]  
Tax impact (9) [6] (4) [7],[8]  
Amounts reclassified from accumulated other comprehensive loss, gross 24 [3],[6] 30 [3],[7],[8] 96
Tax impact (2) [6] (2) [7],[8] 23
Other comprehensive income, net of tax 62 [6] 104 [7],[8]  
Balance (490) [6] (552) [6],[7],[8] (656) [7],[8]
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member]      
Balance [10] (528) [9] (632)  
Other comprehensive income before reclassifications, gross 49 [9] 80 [10]  
Tax impact (9) [9] (4) [10]  
Amounts reclassified from accumulated other comprehensive loss, gross 24 [3],[9],[11],[12] 30 [3],[10],[11],[12] 96
Tax impact [12] (2) [9],[11] (2) [10],[11] 23
Other comprehensive income, net of tax 62 [9] 104 [10]  
Balance (466) [9] (528) [9],[10] (632) [10]
Accumulated Other Comprehensive Income, Other, Net, Including Portion Attributable to Noncontrolling Interest [Member]      
Balance 0 (3)  
Other comprehensive income before reclassifications, gross 4 3  
Tax impact 0 0  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 0 0  
Tax impact 0 0  
Other comprehensive income, net of tax 4 3  
Balance 4 0 (3)
Accumulated Other Comprehensive Income, Other, Net, Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member]      
Balance (4) (7)  
Other comprehensive income before reclassifications, gross 4 3  
Tax impact 0 0  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 0 0  
Tax impact 0 0  
Other comprehensive income, net of tax 4 3  
Balance 0 (4) (7)
Accumulated Other Comprehensive Income (Loss), Unconsolidated Affiliates Including Portion Attributable to Noncontrolling Interest [Member]      
Balance (1,227) (1,273)  
Other comprehensive income before reclassifications, gross 177 17  
Tax impact (1) (8)  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 24 39  
Tax impact (2) (2)  
Other comprehensive income, net of tax 198 46  
Balance (1,029) (1,227) (1,273)
Accumulated Other Comprehensive Income (Loss), Unconsolidated Affiliates Including Portion Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member]      
Balance (1,212) (1,258)  
Other comprehensive income before reclassifications, gross 178 17  
Tax impact (1) (8)  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 24 39  
Tax impact (2) (2)  
Other comprehensive income, net of tax 199 46  
Balance (1,013) (1,212) (1,258)
AOCI Attributable to Noncontrolling Interest [Member]      
Balance 27 28  
Other comprehensive income before reclassifications, gross (4) (1)  
Tax impact 0 0  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 0 0  
Tax impact 0 0  
Other comprehensive income, net of tax (4) (1)  
Balance 23 27 28
AOCI Attributable to Noncontrolling Interest [Member] | Huntsman International LLC [Member]      
Balance 27 28  
Other comprehensive income before reclassifications, gross (4) (1)  
Tax impact 0 0  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 0 0  
Tax impact 0 0  
Other comprehensive income, net of tax (4) (1)  
Balance 23 27 28
AOCI Attributable to Parent [Member]      
Balance (1,200) (1,245) (1,268)
Other comprehensive income before reclassifications, gross 173 16  
Tax impact (1) (8)  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 24 39  
Tax impact (2) (2)  
Other comprehensive income, net of tax 194 45 23
Balance (1,006) (1,200) (1,245)
AOCI Attributable to Parent [Member] | Huntsman International LLC [Member]      
Balance (1,185) (1,230) (1,253)
Other comprehensive income before reclassifications, gross 174 16  
Tax impact (1) (8)  
Amounts reclassified from accumulated other comprehensive loss, gross [3] 24 39  
Tax impact (2) (2)  
Other comprehensive income, net of tax 195 45 23
Balance $ (990) $ (1,185) $ (1,230)
[1] Amounts are net of tax of $52 million and $60 million as of December 31, 2025 and January 1, 2025, respectively.
[2] Amounts are net of tax of $60 million and $56 million as of December 31, 2024 and January 1, 2024, respectively.
[3] See table below for details about these reclassifications.
[4] Amounts are net of tax of $39 million and $47 million as of December 31, 2025 and January 1, 2025, respectively.
[5] Amounts are net of tax of $47 million and $43 million as of both December 31, 2024 and January 1, 2024, respectively.
[6] Amounts are net of tax of $50 million and $61 million as of December 31, 2025 and January 1, 2025, respectively.
[7] Amounts are net of tax of $61 million and $67 million as of December 31, 2024 and January 1, 2024, respectively.
[8] Amounts are net of tax of $67 million and $31 million as of December 31, 2023 and January 1, 2023, respectively.
[9] Amounts are net of tax of $74 million and $85 million as of December 31, 2025 and January 1, 2025, respectively.
[10] Amounts are net of tax of $85 million and $91 million as of December 31, 2024 and January 1, 2024, respectively.
[11] Amounts contain approximately nil, nil and $1 million of prior service credit and actuarial loss related to discontinued operations for the years ended December 31, 2025, 2024 and 2023, respectively.
[12] Details of amounts reclassified from accumulated other comprehensive loss relate only to pension and other postretirement benefits.