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Employee Benefit Plans (Changes In Defined Benefit Obligation And Fair Value Of Defined Benefit Plan Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets, beginning $ 1,742    
Fair value of plan assets, ending 1,269 $ 1,742  
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation, beginning 2,178 3,014  
Service cost 48 64 $ 61
Interest cost 48 48 70
Actuarial loss (gain) (575) (152)  
Employee contributions 3 2  
Curtailments (2) 0  
Settlements (1) (715)  
Benefits paid (47) (51)  
Foreign currency effects (65) (32)  
Benefit obligation, ending 1,587 2,178 3,014
Fair value of plan assets, beginning 1,742 2,337  
Actual return on plan assets (438) 146  
Employer contributions 60 30  
Employee contributions 3 2  
Settlements (1) (715)  
Benefits Paid (47) (51)  
Foreign currency effects (50) (7)  
Fair value of plan assets, ending 1,269 1,742 2,337
Funded status (318) (436)  
Prepaid benefit cost 60 121  
Accrued benefit liability - current (18) (18)  
Accrued benefit liability - long-term (360) (539)  
Net amount recognized in the balance sheet (318) (436)  
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation, beginning 154 173  
Service cost 1 1 1
Interest cost 3 2 4
Actuarial loss (gain) (24) (5)  
Curtailments 0 0  
Settlements 0 0  
Benefits paid (16) (17)  
Foreign currency effects 0 0  
Benefit obligation, ending 118 154 $ 173
Fair value of plan assets, beginning 0    
Employer contributions 16 17  
Benefits Paid (16) (17)  
Fair value of plan assets, ending 0 0  
Funded status (118) (154)  
Accrued benefit liability - current (14) (15)  
Accrued benefit liability - long-term (104) (139)  
Net amount recognized in the balance sheet $ (118) $ (154)