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Restructuring - Narrative (Details)
$ in Millions
6 Months Ended
Jun. 30, 2022
USD ($)
position
Jun. 30, 2021
position
Dec. 31, 2021
USD ($)
2022 Restructuring Plan      
Restructuring Cost and Reserve [Line Items]      
Workforce reduction | position 418    
Employee severance charges $ 127    
Reductions to restructuring reserve 35    
Restructuring reserve balance 92    
2021 Restructuring Plan      
Restructuring Cost and Reserve [Line Items]      
Workforce reduction | position   30  
Reductions to restructuring reserve 2    
Restructuring reserve balance $ 17   $ 19