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Goodwill and other intangible assets (Goodwill Roll Forward) (Details)
$ in Millions
6 Months Ended
Jun. 30, 2023
USD ($)
Goodwill [Roll Forward]  
Beginning balance $ 15,529
Adjustments to goodwill resulting from acquisitions and divestitures, net (8)
Currency translation adjustment 10
Ending balance $ 15,531