Condensed Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 1,825	$ 1,802
Other comprehensive income (loss) before taxes:
Foreign currency translation	30	(8)
Unrealized gains (losses) on available-for-sale securities	6	(2)
Other comprehensive income (loss) before taxes	36	(10)
Income taxes (benefits) related to other comprehensive income items	6	(2)
Other comprehensive income (loss)	30	(8)
Comprehensive income	1,855	1,794
Comprehensive income attributable to noncontrolling interests	215	211
Comprehensive income attributable to HCA Healthcare, Inc.	$ 1,640	$ 1,583