Condensed Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,465	$ 1,580
Other comprehensive income (loss) before taxes:
Foreign currency translation	(34)	8
Unrealized losses on available-for-sale securities	(26)	(11)
Defined benefit plans	0	0
Pension costs included in salaries and benefits	2	7
Total defined benefit plans	2	7
Change in fair value of derivative financial instruments	4	1
Interest costs included in interest expense	2	9
Total change in fair value of derivative financial instruments	6	10
Other comprehensive income (loss) before taxes	(52)	14
Income taxes (benefits) related to other comprehensive income ("OCI") items	(9)	3
Other comprehensive income (loss)	(43)	11
Comprehensive income	1,422	1,591
Comprehensive income attributable to noncontrolling interests	192	157
Comprehensive income attributable to HCA Healthcare, Inc.	$ 1,230	$ 1,434