XML 394 R121.htm IDEA: XBRL DOCUMENT v3.22.0.1
Dividends - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of dividends paid and proposed [line items]      
Payments for dividends     $ 721
Proposed dividends [member]      
Disclosure of dividends paid and proposed [line items]      
Final Proposed (not recognised as a liability at 31 December) $ 0.859    
Final proposed dividend record date May 06, 2022    
Payments for dividends $ 0 $ 0  
Final proposed amount $ 157