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Restructuring - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]          
Expected restructuring and related cost $ 3,500   $ 3,500    
Estimate of cumulative pre tax costs that will result in cash outlays     70.00%    
Estimate of cumulative pre tax costs that will be noncash     30.00%    
Total pretax restructuring costs 175 $ 168 $ 559 $ 630  
Cumulative costs since program inception $ 3,200   $ 3,200    
Forecast          
Restructuring Cost and Reserve [Line Items]          
Expected restructuring and related cost         $ 600