Goodwill and Other Intangible Assets, net (Changes in Goodwill and Net Carrying Amount of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning of period			$ 6,791	$ 5,177	$ 5,177
Acquisitions			154		1,614
Goodwill, end of period	$ 6,945		6,945		6,791
Intangible Assets [Roll Forward]
Intangible assets, net, beginning of period			13,686	12,384	12,384
Acquisitions			(220)		1,430
Asset impairment	(354)	$ 0	(354)	0
Amortization	(37)	$ (27)	(64)	$ (45)	(128)
Intangible assets, net, end of period	$ 13,048		$ 13,048		$ 13,686