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Goodwill and other intangible assets - Goodwill Roll Forward (Details)
$ in Millions
9 Months Ended
Sep. 30, 2023
USD ($)
Goodwill [Roll Forward]  
Beginning balance $ 15,529
Adjustments to goodwill resulting from acquisitions and divestitures, net (22)
Currency translation adjustment 2
Ending balance $ 15,509