Condensed Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,379	$ 1,664	$ 2,844	$ 3,244
Other comprehensive (loss) income before taxes:
Foreign currency translation	(71)	3	(105)	11
Unrealized (losses) gains on available-for-sale securities	(16)	2	(42)	(9)
Losses included in other operating expenses	1		1
Total Unrealized losses on available-for-sale securities	(15)	2	(41)	(9)
Defined benefit plans	0	0	0	0
Pension costs included in salaries and benefits	3	7	5	14
Total defined benefit plans	3	7	5	14
Change in fair value of derivative financial instruments	1	(1)	5
Interest costs included in interest expense	2	9	4	18
Total change in fair value of derivative financial instruments	3	8	9	18
Other comprehensive (loss) income before taxes	(80)	20	(132)	34
Income taxes (benefits) related to other comprehensive income items	(12)	4	(21)	7
Other comprehensive (loss) income	(68)	16	(111)	27
Comprehensive income	1,311	1,680	2,733	3,271
Comprehensive income attributable to noncontrolling interests	224	214	416	371
Comprehensive income attributable to HCA Healthcare, Inc.	$ 1,087	$ 1,466	$ 2,317	$ 2,900