Supplemental Condensed Consolidating Financial Information and Other Collateral-Related Information - Schedule of Quarterly Consolidated Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders Equity Excluding Portion Attributable To Subsidiaries Noncontrolling Interest [Abstract]
Revenues	$ 8,836	$ 8,456	$ 8,450	$ 8,440	$ 8,434	$ 8,062	$ 8,112	$ 8,405	$ 34,182	$ 33,013	$ 29,682
Net income	554	467	537	438	427	455	485	639	1,996	2,006	2,842
Net income attributable to HCA Holdings, Inc.	$ 424	$ 365	$ 423	$ 344	$ 314	$ 360	$ 391	$ 540	$ 1,556	$ 1,605	$ 2,465
Basic earnings per share	$ 0.96	$ 0.82	$ 0.95	$ 0.77	$ 0.71	$ 0.82	$ 0.89	$ 1.23	$ 3.50	$ 3.65	$ 5.17
Diluted earnings per share	$ 0.92	$ 0.79	$ 0.91	$ 0.74	$ 0.68	$ 0.78	$ 0.85	$ 1.18	$ 3.37	$ 3.49	$ 4.97