Goodwill and Other Intangible Assets, net (Changes in Goodwill and Net Carrying Amount of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning of period			$ 5,177	$ 5,177	$ 5,177
Acquisitions			1,614		0
Goodwill, end of period	$ 6,791		6,791		5,177
Intangible Assets [Roll Forward]
Intangible assets, net, beginning of period			12,384	12,306	12,306
Acquisitions			1,430		151
Amortization	(42)	$ (19)	(87)	$ (54)	(73)
Intangible assets, net, end of period	$ 13,727		$ 13,727		$ 12,384