CONSOLIDATED INCOME STATEMENTS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues before the provision for doubtful accounts									$ 36,783	$ 32,506	$ 30,683
Provision for doubtful accounts									3,770	2,824	2,648
Revenues	8,434	8,062	8,112	8,405	7,769	7,258	7,249	7,406	33,013	29,682	28,035
Salaries and benefits									15,089	13,440	12,484
Supplies									5,717	5,179	4,961
Other operating expenses									6,048	5,470	5,004
Electronic health record incentive income									(336)	(210)
Equity in earnings of affiliates									(36)	(258)	(282)
Depreciation and amortization									1,679	1,465	1,421
Interest expense									1,798	2,037	2,097
Gains on sales of facilities	(6)	(5)	(1)	(1)	(84)	(1)	(1)	(2)	(15)	(142)	(4)
Legal claim costs	110								175
Gain on acquisition of controlling interest in equity investment					(1,424)					(1,522)
Impairments of long-lived assets											123
Losses on retirement of debt						256	47			481
Termination of management agreement								149		181
Total expenses including equity in earnings of affiliates									30,119	26,121	25,804
Income before income taxes									2,894	3,561	2,231
Provision for income taxes									888	719	658
Net income	427	455	485	639	2,042	146	320	334	2,006	2,842	1,573
Net income attributable to noncontrolling interests									401	377	366
Net income attributable to HCA Holdings, Inc.	$ 314	$ 360	$ 391	$ 540	$ 1,935	$ 61	$ 229	$ 240	$ 1,605	$ 2,465	$ 1,207
Per share data:
Basic earnings per share	$ 0.71	$ 0.82	$ 0.89	$ 1.23	$ 4.43	$ 0.12	$ 0.44	$ 0.54	$ 3.65	$ 5.17	$ 2.83
Diluted earnings per share	$ 0.68	$ 0.78	$ 0.85	$ 1.18	$ 4.25	$ 0.11	$ 0.43	$ 0.52	$ 3.49	$ 4.97	$ 2.76
Shares used in earnings per share calculations (in thousands):
Basic									440,178	476,609	426,424
Diluted									459,403	495,943	437,347