Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Amounts Recognized in AOCI (Details)

v3.20.4
BENEFIT PLANS - Amounts Recognized in AOCI (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Retirement Benefits [Abstract]      
Net actuarial loss $ (253) $ (261) $ (257)
Prior service cost 0 10 11
Defined benefit pension plans (253) (251) (246)
Net actuarial (loss) gain:      
Amounts arising during the year (7) (17) (5)
Amortization included in net periodic benefit costs 17 12 13
Prior service cost:      
Amounts arising during the year (11)    
Amortization included in net periodic benefit costs (2) (2) (4)
Net actuarial (loss) gain:      
Amounts arising during the year 2 5 2
Amortization included in net periodic benefit costs (4) (3) (3)
Prior service cost:      
Amounts arising during the year 3    
Amortization included in net periodic benefit costs 0 0 1
Net actuarial (loss) gain:      
Amounts arising during the year (5) (12) (3)
Amortization included in net periodic benefit costs 13 9 10
Prior service cost:      
Amounts arising during the year (8)    
Amortization included in net periodic benefit costs (2) (2) (3)
Total recognized in OCI (253) (251) (246)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax (3) (7) 4
Net change in pension and other post-retirement obligations 1 2 0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax $ (2) $ (5) $ 4