Annual report pursuant to Section 13 and 15(d)

Note 19 - Employee Benefit Plans - Periodic Benefit Cost and Other Comprehensive Income (Loss) (Details)

v3.20.4
Note 19 - Employee Benefit Plans - Periodic Benefit Cost and Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Pension Plan [Member] | UNITED STATES      
Current year actuarial loss $ 40 $ 19 $ 18
Amortization of actuarial loss (28) (26) (34)
Current year prior service (credits) cost 0 0 0
Amortization of prior service credit 2 2 2
Settlements (42) 0 (2)
Total recognized in other comprehensive income (loss) (28) (5) (16)
Amounts related to discontinued operations 17 9 (4)
Total recognized in other comprehensive income (loss) in continuing operations (11) 4 (20)
Net periodic benefit cost 25 29 39
Total recognized in net periodic benefit cost and other comprehensive income (loss) 14 33 19
Pension Plan [Member] | UNITED STATES | Huntsman International LLC [Member]      
Current year actuarial loss 40 19 18
Amortization of actuarial loss (28) (26) (34)
Current year prior service (credits) cost 0 0 0
Amortization of prior service credit 2 2 2
Settlements (42) 0 (2)
Total recognized in other comprehensive income (loss) (28) (5) (16)
Amounts related to discontinued operations 17 9 (4)
Total recognized in other comprehensive income (loss) in continuing operations (11) 4 (20)
Net periodic benefit cost 25 29 39
Total recognized in net periodic benefit cost and other comprehensive income (loss) 14 33 19
Curtailment (gain) loss 0 0 0
Pension Plan [Member] | Foreign Plan [Member]      
Current year actuarial loss 87 101 117
Amortization of actuarial loss (53) (45) (38)
Current year prior service (credits) cost 0 (10) 4
Amortization of prior service credit 5 4 5
Settlements 0 1 0
Total recognized in other comprehensive income (loss) 39 51 88
Amounts related to discontinued operations 0 0 0
Total recognized in other comprehensive income (loss) in continuing operations 39 51 88
Net periodic benefit cost (10) 7 (7)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 29 58 81
Pension Plan [Member] | Foreign Plan [Member] | Huntsman International LLC [Member]      
Current year actuarial loss 87 101 117
Amortization of actuarial loss (57) (48) (41)
Current year prior service (credits) cost 0 (10) 4
Amortization of prior service credit 5 4 5
Settlements 0 1 0
Total recognized in other comprehensive income (loss) 35 48 85
Amounts related to discontinued operations 0 0 0
Total recognized in other comprehensive income (loss) in continuing operations 35 48 85
Net periodic benefit cost (6) 10 (4)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 29 58 81
Curtailment (gain) loss 0 0 0
Other Postretirement Benefits Plan [Member] | UNITED STATES      
Current year actuarial loss 9 0 (10)
Amortization of actuarial loss (1) (1) (2)
Current year prior service (credits) cost 0 0 0
Amortization of prior service credit 5 5 6
Settlements (1) 0 0
Total recognized in other comprehensive income (loss) 14 4 (6)
Amounts related to discontinued operations 0 (6) 0
Total recognized in other comprehensive income (loss) in continuing operations 14 (2) (6)
Net periodic benefit cost (1) 0 1
Total recognized in net periodic benefit cost and other comprehensive income (loss) 13 (2) (5)
Curtailment (gain) loss 2 0 0
Other Postretirement Benefits Plan [Member] | UNITED STATES | Huntsman International LLC [Member]      
Current year actuarial loss 9 0 (10)
Amortization of actuarial loss (1) (1) (2)
Current year prior service (credits) cost 0 0 0
Amortization of prior service credit 5 5 6
Settlements (1) 0 0
Total recognized in other comprehensive income (loss) 14 4 (6)
Amounts related to discontinued operations 0 (6) 0
Total recognized in other comprehensive income (loss) in continuing operations 14 (2) (6)
Net periodic benefit cost (1) 0 1
Total recognized in net periodic benefit cost and other comprehensive income (loss) 13 (2) (5)
Curtailment (gain) loss 2 0 0
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]      
Current year actuarial loss 0 0 0
Amortization of actuarial loss 0 0 0
Current year prior service (credits) cost 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 0 0 0
Total recognized in net periodic benefit cost and other comprehensive income (loss) 0 0 0
Curtailment (gain) loss 0 0 0
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member] | Huntsman International LLC [Member]      
Current year actuarial loss 0 0 0
Amortization of actuarial loss 0 0 0
Current year prior service (credits) cost 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 0 0 0
Total recognized in net periodic benefit cost and other comprehensive income (loss) 0 0 0
Curtailment (gain) loss $ 0 $ 0 $ 0