Condensed Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,344	$ 2,472	$ 4,188	$ 5,716
Other comprehensive (loss) income before taxes:
Foreign currency translation	(76)	(31)	(181)	(20)
Unrealized losses on available-for-sale securities	(16)	(3)	(58)	(12)
Losses included in other operating expenses	0	0	1	0
Total Unrealized losses on available-for-sale securities	(16)	(3)	(57)	(12)
Defined benefit plans	0	0	0	0
Pension costs included in salaries and benefits	2	7	7	21
Total defined benefit plans	2	7	7	21
Change in fair value of derivative financial instruments	1	(1)	6	(1)
Interest costs included in interest expense	0	10	4	28
Total change in fair value of derivative financial instruments	1	9	10	27
Other comprehensive (loss) income before taxes	(89)	(18)	(221)	16
Income taxes (benefits) related to other comprehensive income items	(12)	(1)	(33)	6
Other comprehensive (loss) income	(77)	(17)	(188)	10
Comprehensive income	1,267	2,455	4,000	5,726
Comprehensive income attributable to noncontrolling interests	210	203	626	574
Comprehensive income attributable to HCA Healthcare, Inc.	$ 1,057	$ 2,252	$ 3,374	$ 5,152