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Employee Benefit Plans - Accumulated Benefit Obligation in Excess of Plan Assets (Details) - Pension Plan - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation $ 3,993 $ 5,170
Fair Value of Plan Assets 2,688 3,675
Benefit Obligation 4,629 5,201
Fair Value of Plan Assets 3,295 3,675
United States    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation 3,372 3,747
Fair Value of Plan Assets 2,544 2,802
Benefit Obligation 3,372 3,747
Fair Value of Plan Assets 2,544 2,802
Non-U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation 621 1,423
Fair Value of Plan Assets 144 873
Benefit Obligation 1,257 1,454
Fair Value of Plan Assets 751 873
Underfunded Plan | United States    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation 3,056 3,408
Fair Value of Plan Assets 2,544 2,802
Benefit Obligation 3,056 3,408
Fair Value of Plan Assets 2,544 2,802
Underfunded Plan | Non-U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation 181 921
Fair Value of Plan Assets 144 873
Benefit Obligation 810 942
Fair Value of Plan Assets 751 873
Unfunded Plan | United States    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation 316 339
Fair Value of Plan Assets 0 0
Benefit Obligation 316 339
Fair Value of Plan Assets 0 0
Unfunded Plan | Non-U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Benefit Obligation 440 502
Fair Value of Plan Assets 0 0
Benefit Obligation 447 512
Fair Value of Plan Assets $ 0 $ 0