Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - AOCI (Loss) and Related Tax Effects (Details)

v3.20.4
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - AOCI (Loss) and Related Tax Effects (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax $ (219) $ (458) $ (412)  
AOCI Including Portion Attributable to Noncontrolling Interest, Tax 86 139 128  
Accumulated other comprehensive loss (133) (319) (284) $ (39)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax (221) (454) (408)  
AOCI Including Portion Attributable to Noncontrolling Interest, Tax 86 138 127  
Accumulated other comprehensive loss (135) (316) (281) 264
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax 3      
AOCI Including Portion Attributable to Noncontrolling Interest, Tax 0      
Accumulated other comprehensive loss 3 0 0 225
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax (1) (4) (4)  
AOCI Including Portion Attributable to Noncontrolling Interest, Tax 0 1 1  
Accumulated other comprehensive loss $ (1) $ (3) $ (3) $ 0