Condensed Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 1,482	$ 1,275	$ 4,971	$ 4,230
Other comprehensive income (loss) before taxes:
Foreign currency translation	55	(35)	48	3
Unrealized gains (losses) on available-for-sale securities	13	(7)	10	(5)
Defined benefit plans	0	0	0	0
Pension costs included in salaries and benefits	(1)	1	(1)	1
Total defined benefit plans	(1)	1	(1)	1
Other comprehensive income (loss) before taxes	67	(41)	57	(1)
Income taxes (benefits) related to other comprehensive income items	12	(6)	10	0
Other comprehensive income (loss)	55	(35)	47	(1)
Comprehensive income	1,537	1,240	5,018	4,229
Comprehensive income attributable to noncontrolling interests	212	196	649	595
Comprehensive income attributable to HCA Healthcare, Inc.	$ 1,325	$ 1,044	$ 4,369	$ 3,634