Consolidated Comprehensive Income Statements - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 6,091	$ 6,834	$ 7,721
Other comprehensive income (loss) before taxes:
Foreign currency translation	41	(111)	(9)
Unrealized gains (losses) on available-for-sale securities	11	(55)	(16)
Losses (gains) included in other operating expenses	(1)	1	0
Total Unrealized losses on available-for-sale securities	10	(54)	(16)
Defined benefit plans	27	49	87
Pension costs included in salaries and benefits	3	9	28
Total defined benefit plans	30	58	115
Change in fair value of derivative financial instruments	0	6	1
Interest costs included in interest expense	0	2	37
Total change in fair value of derivative financial instruments	0	8	38
Other comprehensive income (loss) before taxes	81	(99)	128
Income taxes (benefits) related to other comprehensive income items	16	(13)	30
Other comprehensive income (loss)	65	(86)	98
Comprehensive income	6,156	6,748	7,819
Comprehensive income attributable to noncontrolling interests	849	1,191	765
Comprehensive income attributable to HCA Healthcare, Inc.	$ 5,307	$ 5,557	$ 7,054