XML 59 R49.htm IDEA: XBRL DOCUMENT v3.23.3
General and significant accounting policies (Narrative) (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Jul. 01, 2023
Jun. 30, 2023
Dec. 31, 2022
Jan. 01, 2021
General and significant accounting policies [Line Items]          
Retained earnings $ 51,510     $ 48,305  
Accumulated other comprehensive income (loss) (AOCI) $ (11,518)     (10,185)  
Huatai Group          
General and significant accounting policies [Line Items]          
Equity Method Investment, Ownership Percentage     64.20%    
Huatai Group          
General and significant accounting policies [Line Items]          
Subsidiary, Ownership Percentage, Parent 69.60% 69.60%      
Subsidiary, Ownership Percentage, Noncontrolling Owner   30.40%      
Effect of Modified Retrospective Application Accounting Standards Update 2018-12          
General and significant accounting policies [Line Items]          
Retained earnings       29 $ 52
Accumulated other comprehensive income (loss) (AOCI)       $ 8 $ 1,800