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Equity (Details 4)
$ / shares in Units, Pure in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
year
$ / shares
Dec. 31, 2020
USD ($)
year
$ / shares
Dec. 31, 2022
year
$ / shares
Statement of changes in equity [abstract]      
Commitment for repurchase own shares | $ $ 2,809 $ 1,800  
Maximal amount of share buyback programm | $ $ 15,000 $ 2,500  
Written call options held by market maker 3.0 1.0 3.0
Written call options, contractual live | year     10
Written call options, contractual live, remaining | year 2 3 1
Written call options, weighted average exercise price | $ / shares $ 61.45 $ 60.09 $ 66.07
Number of options repurchased   (3.7)