Goodwill and Other Intangibles (Changes in the Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Goodwill [Roll Forward]
Balance as of January 1,	$ 16,251	$ 16,317
Goodwill acquired	11	17
Other adjustments	38	(80)
Balance at March 31,	$ 16,300	$ 16,254