CONDENSED CONSOLIDATED COMPREHENSIVE INCOME STATEMENTS (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 632	$ 537	$ 1,086	$ 975
Other comprehensive income before taxes:
Foreign currency translation	30		40	(60)
Unrealized gains (losses) on available-for-sale securities	4	(9)	8	(8)
Defined benefit plans
Pension costs included in salaries and benefits	4	8	8	15
Total defined benefit plans	4	8	8	15
Change in fair value of derivative financial instruments	(19)	47	(29)	40
Interest costs included in interest expense	32	32	65	64
Total change in fair value of derivative financial instruments	13	79	36	104
Other comprehensive income before taxes	51	78	92	51
Income taxes related to other comprehensive income items	18	29	34	20
Other comprehensive income	33	49	58	31
Comprehensive income	665	586	1,144	1,006
Comprehensive income attributable to noncontrolling interests	149	114	256	208
Comprehensive income attributable to HCA Holdings, Inc.	$ 516	$ 472	$ 888	$ 798