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Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract]        
Unrealized loss arising during period, tax $ (23) $ 8 $ 54 $ 5
Reclassification adjustment for losses included in net earnings, tax (3)   (4) 1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent [Abstract]        
Amortization of prior service cost included in net periodic pension cost, tax 6 7 12 13
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax 3   3  
Amortization of actuarial losses included in net periodic pension cost, tax (50) (33) (103) (65)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest (19) $ (7) (32) (7)
Other Comprehensive Income, Settlements and curtailments included in net income, tax $ (1)   $ (1)  
Pension and post retirement benefits related to our equity method investments, tax       $ (2)