Annual report pursuant to Section 13 and 15(d)

Note 19 - Employee Benefit Plans - Amounts Recognized and Amounts Expected to Be Recognized in Other Comprehensive Income (Loss) (Details)

v3.20.4
Note 19 - Employee Benefit Plans - Amounts Recognized and Amounts Expected to Be Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
UNITED STATES | Pension Plan [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss $ 363 $ 394
Prior service credit (9) (11)
Total 354 383
UNITED STATES | Pension Plan [Member] | Huntsman International LLC [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 363 395
Prior service credit (9) (11)
Total 354 384
UNITED STATES | Other Postretirement Benefits Plan [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 26 20
Prior service credit (25) (33)
Total 1 (13)
UNITED STATES | Other Postretirement Benefits Plan [Member] | Huntsman International LLC [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 26 20
Prior service credit (25) (33)
Total 1 (13)
Foreign Plan [Member] | Pension Plan [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 874 840
Prior service credit (27) (32)
Total 847 808
Foreign Plan [Member] | Pension Plan [Member] | Huntsman International LLC [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 877 846
Prior service credit (27) (31)
Total 850 815
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 0 0
Prior service credit 0 0
Total 0 0
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member] | Huntsman International LLC [Member]    
Amounts recognized in accumulated other comprehensive loss:    
Net actuarial loss 0 0
Prior service credit 0 0
Total $ 0 $ 0