Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill	$ 6,980	$ 7,033	$ 7,033
Accumulated impairment losses	(2,814)	(2,814)	(2,814)
Goodwill	4,166	4,219	$ 4,219
Goodwill acquired as part of acquisitions during current year	11	5
Goodwill allocated to hospitals divested or held-for-sale	$ (64)	$ (5)