v3.20.4
Restructuring Charges - Schedule of Components of Restructuring Charges (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]      
Net restructuring charges $ 78 $ 28 $ 6
Personnel lay-off costs      
Restructuring Cost and Reserve [Line Items]      
Net restructuring charges 78 32 4
Other exit costs      
Restructuring Cost and Reserve [Line Items]      
Net restructuring charges 0 0 2
Release of provisions/accruals      
Restructuring Cost and Reserve [Line Items]      
Net restructuring charges $ 0 $ (4) $ 0