Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill	$ 6,757	$ 6,980
Accumulated impairment losses	(2,814)	(2,814)
Goodwill	3,943	$ 4,166
Goodwill acquired as part of acquisitions during current year	17
Goodwill allocated to hospitals divested or held-for-sale	$ (240)