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Retirement Benefit Obligations - Summary of Composition of Net Pension Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Net Defined Benefit Liability (Asset) [Line Items]    
Net pension liability $ (220) $ (428)
Retirement benefit assets 166 0
Retirement benefit obligations (475) (556)
Net pension deficit [1] (309) (556)
Eurozone [member]    
Disclosure of Net Defined Benefit Liability (Asset) [Line Items]    
Net pension liability (87) (138)
United States and Canada [member]    
Disclosure of Net Defined Benefit Liability (Asset) [Line Items]    
Net pension liability (164) (206)
Switzerland [member]    
Disclosure of Net Defined Benefit Liability (Asset) [Line Items]    
Net pension liability 66 22
Other [member]    
Disclosure of Net Defined Benefit Liability (Asset) [Line Items]    
Net pension liability $ (35) $ (106)
[1]  Reconciliation to Group Balance Sheet