Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Amounts Recognized in AOCI (Details)

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BENEFIT PLANS - Amounts Recognized in AOCI (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Retirement Benefits [Abstract]      
Net actuarial loss $ (225) $ (253) $ (261)
Prior service cost 0 0 10
Defined benefit pension plans (225) (253) (251)
Net actuarial (loss) gain:      
Amounts arising during the year 18 (7) (17)
Amortization included in net periodic benefit costs 18 17 12
Prior service cost:      
Amounts arising during the year (11)    
Amortization included in net periodic benefit costs   2 2
Total recognized in OCI 36 (3) (7)
Net actuarial (loss) gain:      
Amounts arising during the year (4) 2 5
Amortization included in net periodic benefit costs (4) (4) (3)
Prior service cost:      
Amounts arising during the year   3  
Amortization included in net periodic benefit costs   0 0
Total recognized in OCI (8) 1 2
Net actuarial (loss) gain:      
Amounts arising during the year 14 (5) (12)
Amortization included in net periodic benefit costs 14 13 9
Prior service cost:      
Amounts arising during the year     (8)
Amortization included in net periodic benefit costs   2 2
Total recognized in OCI $ 28 $ (2) $ (5)