Annual report pursuant to Section 13 and 15(d)

Note 18 - Employee Benefit Plans - Periodic Benefit Cost and Other Comprehensive Income (Loss) (Details)

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Note 18 - Employee Benefit Plans - Periodic Benefit Cost and Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Plan [Member] | UNITED STATES      
Current year actuarial (gain) loss $ (78) $ 40 $ 19
Amortization of actuarial loss (31) (28) (26)
Current year prior service cost (credit) 0 0 0
Amortization of prior service credit 2 2 2
Settlements 0 (42) 0
Total recognized in other comprehensive income (loss) (107) (28) (5)
Amounts related to discontinued operations 18 17 9
Total recognized in other comprehensive income (loss) in continuing operations (89) (11) 4
Net periodic benefit cost (credit) 18 25 29
Total recognized in net periodic benefit cost and other comprehensive income (loss) (71) 14 33
Pension Plan [Member] | UNITED STATES | Huntsman International LLC [Member]      
Current year actuarial (gain) loss (78) 40 19
Amortization of actuarial loss (31) (28) (26)
Current year prior service cost (credit) 0 0 0
Amortization of prior service credit 2 2 2
Settlements 0 (42) 0
Total recognized in other comprehensive income (loss) (107) (28) (5)
Amounts related to discontinued operations 18 17 9
Total recognized in other comprehensive income (loss) in continuing operations (89) (11) 4
Net periodic benefit cost (credit) 18 25 29
Total recognized in net periodic benefit cost and other comprehensive income (loss) (71) 14 33
Pension Plan [Member] | Foreign Plan [Member]      
Current year actuarial (gain) loss (150) 87 101
Amortization of actuarial loss (59) (53) (45)
Current year prior service cost (credit) 1 0 (10)
Amortization of prior service credit 5 5 4
Settlements (3) 0 1
Total recognized in other comprehensive income (loss) (206) 39 51
Amounts related to discontinued operations 0 0 0
Total recognized in other comprehensive income (loss) in continuing operations (206) 39 51
Net periodic benefit cost (credit) 4 (10) 7
Total recognized in net periodic benefit cost and other comprehensive income (loss) (202) 29 58
Pension Plan [Member] | Foreign Plan [Member] | Huntsman International LLC [Member]      
Current year actuarial (gain) loss (150) 87 101
Amortization of actuarial loss (62) (57) (48)
Current year prior service cost (credit) 1 0 (10)
Amortization of prior service credit 5 5 4
Settlements (3) 0 1
Total recognized in other comprehensive income (loss) (209) 35 48
Amounts related to discontinued operations 0 0 0
Total recognized in other comprehensive income (loss) in continuing operations (209) 35 48
Net periodic benefit cost (credit) 7 (6) 10
Total recognized in net periodic benefit cost and other comprehensive income (loss) (202) 29 58
Other Postretirement Benefits Plan [Member] | UNITED STATES      
Current year actuarial (gain) loss (2) 9 0
Amortization of actuarial loss (2) (1) (1)
Current year prior service cost (credit) 0 0 0
Amortization of prior service credit 5 5 5
Settlements 0 (1) 0
Total recognized in other comprehensive income (loss) 1 14 4
Amounts related to discontinued operations 1 0 (6)
Total recognized in other comprehensive income (loss) in continuing operations 2 14 (2)
Net periodic benefit cost (credit) 1 (1) 0
Total recognized in net periodic benefit cost and other comprehensive income (loss) 3 13 (2)
Curtailment loss 0 2 0
Other Postretirement Benefits Plan [Member] | UNITED STATES | Huntsman International LLC [Member]      
Current year actuarial (gain) loss (2) 9 0
Amortization of actuarial loss (2) (1) (1)
Current year prior service cost (credit) 0 0 0
Amortization of prior service credit 5 5 5
Settlements 0 (1) 0
Total recognized in other comprehensive income (loss) 1 14 4
Amounts related to discontinued operations 1 0 (6)
Total recognized in other comprehensive income (loss) in continuing operations 2 14 (2)
Net periodic benefit cost (credit) 1 (1) 0
Total recognized in net periodic benefit cost and other comprehensive income (loss) 3 13 (2)
Curtailment loss 0 2 0
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]      
Current year actuarial (gain) loss 0 0 0
Amortization of actuarial loss 0 0 0
Current year prior service cost (credit) 0 0 0
Amortization of prior service credit 0 0 0
Settlements 0 0 0
Total recognized in other comprehensive income (loss) 0 0 0
Amounts related to discontinued operations 0 0 0
Total recognized in other comprehensive income (loss) in continuing operations 0 0 0
Net periodic benefit cost (credit) 0 0 0
Total recognized in net periodic benefit cost and other comprehensive income (loss) 0 0 0
Curtailment loss 0 0 0
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member] | Huntsman International LLC [Member]      
Current year actuarial (gain) loss 0 0 0
Amortization of actuarial loss 0 0 0
Current year prior service cost (credit) 0 0 0
Amortization of prior service credit 0 0 0
Settlements 0 0 0
Total recognized in other comprehensive income (loss) 0 0 0
Amounts related to discontinued operations 0 0 0
Total recognized in other comprehensive income (loss) in continuing operations 0 0 0
Net periodic benefit cost (credit) 0 0 0
Total recognized in net periodic benefit cost and other comprehensive income (loss) 0 0 0
Curtailment loss $ 0 $ 0 $ 0