Condensed Consolidated Comprehensive Income Statements - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 698	$ 1,181
Other comprehensive income (loss) before taxes:
Foreign currency translation	(73)	20
Unrealized gains (losses) on available-for-sale securities	(5)	8
Defined benefit plans	0	0
Pension costs included in salaries and benefits	4	3
Total defined benefit plans	4	3
Change in fair value of derivative financial instruments	(60)	(18)
Interest benefits included in interest expense	(1)	(5)
Total change in fair value of derivative financial instruments	(61)	(23)
Other comprehensive income (loss) before taxes	(135)	8
Income taxes (benefits) related to other comprehensive income items	(24)	1
Other comprehensive income (loss)	(111)	7
Comprehensive income	587	1,188
Comprehensive income attributable to noncontrolling interests	117	142
Comprehensive income attributable to HCA Healthcare, Inc.	$ 470	$ 1,046