Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Goodwill Roll Forward
Goodwill	$ 7,015	$ 7,033
Accumulated impairment losses	(2,814)	(2,814)
Goodwill	4,201	$ 4,219
Goodwill acquired as part of acquisitions during current year	13
Goodwill allocated to hospitals held for sale or divested	$ (31)