Goodwill and Other Intangibles (Changes in the Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Roll Forward]
Balance as of January 1,	$ 16,251	$ 16,317
Goodwill acquired	480	139
Other adjustments	(76)	(880)
Balance at September 30,	$ 16,655	$ 15,576