Condensed Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues before provision for doubtful accounts	$ 11,806	$ 11,081	$ 23,189	$ 22,131
Provision for doubtful accounts	1,073	762	1,833	1,552
Revenues	10,733	10,319	21,356	20,579
Salaries and benefits	4,896	4,691	9,797	9,393
Supplies	1,795	1,718	3,592	3,432
Other operating expenses	1,965	1,868	3,895	3,721
Equity in earnings of affiliates	(13)	(10)	(23)	(22)
Depreciation and amortization	521	489	1,042	968
Interest expense	411	427	830	843
Gains on sales of facilities	(2)	(6)	(3)	(5)
Legal claim costs		10		22
Total expenses including equity in earnings of affiliates	9,573	9,187	19,130	18,352
Income before income taxes	1,160	1,132	2,226	2,227
Provision for income taxes	365	341	654	625
Net income	795	791	1,572	1,602
Net income attributable to noncontrolling interests	138	133	256	250
Net income attributable to HCA Healthcare, Inc.	$ 657	$ 658	$ 1,316	$ 1,352
Per share data:
Basic earnings per share	$ 1.79	$ 1.70	$ 3.58	$ 3.45
Diluted earnings per share	$ 1.75	$ 1.65	$ 3.48	$ 3.34
Shares used in earnings per share calculations (in millions):
Basic	365,847	386,406	368,056	391,401
Diluted	375,338	398,659	377,647	404,617