Quarterly report pursuant to Section 13 or 15(d)

OTHER COMPREHENSIVE INCOME - COMPONENTS AND CHANGES IN ACCUMULATED OTHER COMPREHENSIVE LOSS - HUNTSMAN CORPORATION (Details)

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OTHER COMPREHENSIVE INCOME - COMPONENTS AND CHANGES IN ACCUMULATED OTHER COMPREHENSIVE LOSS - HUNTSMAN CORPORATION (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Components of other comprehensive income        
Balance at the beginning of the period $ 2,824 $ 2,749 $ 2,749  
Other comprehensive income, net of tax (21) 54    
Balance at the end of the period 3,383 2,863 2,824 $ 2,749
Total        
Components of other comprehensive income        
Balance at the beginning of the period (1,388) (1,352) (1,352)  
Other comprehensive (loss) income before reclassifications, gross (59) 40    
Tax benefit (expense) (6) 2    
Amounts reclassified from accumulated other comprehensive loss, gross 58 15    
Tax benefit (expense) (14) (3)    
Other comprehensive income, net of tax (21) 54    
Balance at the end of the period (1,409) (1,298) (1,388) (1,352)
Foreign currency translation adjustment        
Components of other comprehensive income        
Balance at the beginning of the period (369) (371) (371)  
Other comprehensive (loss) income before reclassifications, gross (67) 40    
Tax benefit (expense) (6) 2    
Other comprehensive income, net of tax (73) 42    
Balance at the end of the period (442) (329) (369) (371)
Foreign currency translation adjustment, tax 74 69 68 71
Pension and other postretirement benefits adjustments        
Components of other comprehensive income        
Balance at the beginning of the period (1,031) (994) (994)  
Other comprehensive (loss) income before reclassifications, gross 8      
Amounts reclassified from accumulated other comprehensive loss, gross 58 15    
Tax benefit (expense) (14) (3)    
Other comprehensive income, net of tax 52 12    
Balance at the end of the period (979) (982) (1,031) (994)
Pension and other postretirement benefits adjustments, tax 134 132 148 135
Other comprehensive income of unconsolidated affiliates        
Components of other comprehensive income        
Balance at the beginning of the period 8 8 8  
Balance at the end of the period 8 8 8 8
Other, net        
Components of other comprehensive income        
Balance at the beginning of the period 4 5 5  
Balance at the end of the period 4 5 4 5
Amounts attributable to noncontrolling interests        
Components of other comprehensive income        
Balance at the beginning of the period 26 36 36  
Other comprehensive (loss) income before reclassifications, gross   (2)    
Other comprehensive income, net of tax   (2)    
Balance at the end of the period 26 34 26 36
Accumulated other comprehensive loss        
Components of other comprehensive income        
Balance at the beginning of the period (1,362) (1,316) (1,316)  
Other comprehensive (loss) income before reclassifications, gross (59) 38    
Tax benefit (expense) (6) 2    
Amounts reclassified from accumulated other comprehensive loss, gross 58 15    
Tax benefit (expense) (14) (3)    
Other comprehensive income, net of tax (21) 52    
Balance at the end of the period $ (1,383) $ (1,264) $ (1,362) $ (1,316)