Consolidated Comprehensive Income Statements - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 6,657	$ 6,091	$ 6,834
Other comprehensive income (loss) before taxes:
Foreign currency translation	(16)	41	(111)
Unrealized gains (losses) on available-for-sale securities	1	11	(55)
Losses (gains) included in other operating expenses	0	(1)	1
Total Unrealized losses on available-for-sale securities	1	10	(54)
Defined benefit plans	65	27	49
Pension costs included in salaries and benefits	1	3	9
Total defined benefit plans	66	30	58
Change in fair value of derivative financial instruments	0	0	6
Interest costs included in interest expense	0	0	2
Total change in fair value of derivative financial instruments	0	0	8
Other comprehensive income (loss) before taxes	51	81	(99)
Income taxes (benefits) related to other comprehensive income items	13	16	(13)
Other comprehensive income (loss)	38	65	(86)
Comprehensive income	6,695	6,156	6,748
Comprehensive income attributable to noncontrolling interests	897	849	1,191
Comprehensive income attributable to HCA Healthcare, Inc.	$ 5,798	$ 5,307	$ 5,557