Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details)

v3.20.4
PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost $ (82)    
Pension Plan [Member]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 23 $ 17 $ 19
Interest cost 64 35 30
Expected return on plan assets (140) (55) (60)
Amortization:      
Net actuarial loss 27 24 21
Amortization of prior service cost (credit) 1 1 2
Settlements (6) 0 1
Net periodic benefit cost (credit) (31) 22 13
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (168)    
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 8 2 2
Interest cost 19 10 8
Expected return on plan assets (20) (17) (18)
Amortization:      
Net actuarial loss 3 5 5
Amortization of prior service cost (credit) (2) (2) (3)
Settlements 0 0 0
Net periodic benefit cost (credit) 8 $ (2) $ (6)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost $ 86