Supplemental Condensed Consolidating Financial Information and Other Collateral-Related Information - Schedule of Condensed Consolidating Comprehensive Income Statement (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended								12 Months Ended
	Mar. 31, 2013	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
Supplemental Condensed Consolidating Financial Information [Line Items]
Revenues before provision for doubtful accounts										$ 38,040	$ 36,783	$ 32,506
Provision for doubtful accounts										3,858	3,770	2,824
Revenues		8,836	8,456	8,450	8,440	8,434	8,062	8,112	8,405	34,182	33,013	29,682
Salaries and benefits										15,646	15,089	13,440
Supplies										5,970	5,717	5,179
Other operating expenses										6,237	6,048	5,470
Electronic health record incentive income										(216)	(336)	(210)
Equity in earnings of affiliates										(29)	(36)	(258)
Depreciation and amortization										1,753	1,679	1,465
Interest expense										1,848	1,798	2,037
Losses (gains) on sales of facilities		(2)	1	(3)	11	(6)	(5)	1	1	10	(15)	(142)
Gain on acquisition of controlling interest in equity investment												(1,522)
Legal claim costs						110					175
Loss on retirement of debt	17				11					17		481
Termination of management agreement												181
Management fees
Total expenses including equity in earnings of affiliates										31,236	30,119	26,121
Income (loss) before income taxes										2,946	2,894	3,561
Provision (benefit) for income taxes										950	888	719
Net income (loss)		554	467	537	438	427	455	485	639	1,996	2,006	2,842
Net income attributable to noncontrolling interests										440	401	377
Net income (loss) attributable to HCA Holdings, Inc.		424	365	423	344	314	360	391	540	1,556	1,605	2,465
Comprehensive income (loss) attributable to HCA Holdings, Inc.										1,756	1,588	2,453
HCA Holdings, Inc. Issuer [Member]
Supplemental Condensed Consolidating Financial Information [Line Items]
Revenues before provision for doubtful accounts
Provision for doubtful accounts
Revenues
Salaries and benefits
Supplies
Other operating expenses										8	3
Electronic health record incentive income
Equity in earnings of affiliates										(1,875)	(1,668)	(2,531)
Depreciation and amortization
Interest expense										184	123	120
Losses (gains) on sales of facilities
Gain on acquisition of controlling interest in equity investment
Legal claim costs
Loss on retirement of debt
Termination of management agreement
Management fees
Total expenses including equity in earnings of affiliates										(1,683)	(1,542)	(2,411)
Income (loss) before income taxes										1,683	1,542	2,411
Provision (benefit) for income taxes										(73)	(46)	(42)
Net income (loss)										1,756	1,588	2,453
Net income attributable to noncontrolling interests
Net income (loss) attributable to HCA Holdings, Inc.										1,756	1,588	2,453
Comprehensive income (loss) attributable to HCA Holdings, Inc.										1,756	1,588	2,453
HCA Inc. Issuer [Member]
Supplemental Condensed Consolidating Financial Information [Line Items]
Revenues before provision for doubtful accounts
Provision for doubtful accounts
Revenues
Salaries and benefits
Supplies
Other operating expenses										(2)	5	4
Electronic health record incentive income
Equity in earnings of affiliates
Depreciation and amortization
Interest expense										2,253	2,167	2,390
Losses (gains) on sales of facilities
Gain on acquisition of controlling interest in equity investment
Legal claim costs											175
Loss on retirement of debt										17		481
Termination of management agreement												181
Management fees
Total expenses including equity in earnings of affiliates										2,268	2,347	3,056
Income (loss) before income taxes										(2,268)	(2,347)	(3,056)
Provision (benefit) for income taxes										(860)	(839)	(1,068)
Net income (loss)										(1,408)	(1,508)	(1,988)
Net income attributable to noncontrolling interests
Net income (loss) attributable to HCA Holdings, Inc.										(1,408)	(1,508)	(1,988)
Comprehensive income (loss) attributable to HCA Holdings, Inc.										(1,324)	(1,526)	(1,969)
Subsidiary Guarantors [Member]
Supplemental Condensed Consolidating Financial Information [Line Items]
Revenues before provision for doubtful accounts										20,042	19,415	18,126
Provision for doubtful accounts										2,262	2,144	1,644
Revenues										17,780	17,271	16,482
Salaries and benefits										8,387	7,959	7,584
Supplies										3,158	2,995	2,851
Other operating expenses										2,998	3,013	2,741
Electronic health record incentive income										(142)	(219)	(126)
Equity in earnings of affiliates										(2)	(5)	(86)
Depreciation and amortization										855	821	777
Interest expense										(523)	(468)	(342)
Losses (gains) on sales of facilities										20	3	(127)
Gain on acquisition of controlling interest in equity investment
Legal claim costs
Loss on retirement of debt
Termination of management agreement
Management fees										(632)	(569)	(491)
Total expenses including equity in earnings of affiliates										14,119	13,530	12,781
Income (loss) before income taxes										3,661	3,741	3,701
Provision (benefit) for income taxes										1,362	1,313	1,271
Net income (loss)										2,299	2,428	2,430
Net income attributable to noncontrolling interests										69	62	63
Net income (loss) attributable to HCA Holdings, Inc.										2,230	2,366	2,367
Comprehensive income (loss) attributable to HCA Holdings, Inc.										2,338	2,339	2,341
Subsidiary Non-Guarantors [Member]
Supplemental Condensed Consolidating Financial Information [Line Items]
Revenues before provision for doubtful accounts										17,998	17,368	14,380
Provision for doubtful accounts										1,596	1,626	1,180
Revenues										16,402	15,742	13,200
Salaries and benefits										7,259	7,130	5,856
Supplies										2,812	2,722	2,328
Other operating expenses										3,233	3,027	2,725
Electronic health record incentive income										(74)	(117)	(84)
Equity in earnings of affiliates										(27)	(31)	(172)
Depreciation and amortization										898	858	688
Interest expense										(66)	(24)	(131)
Losses (gains) on sales of facilities										(10)	(18)	(15)
Gain on acquisition of controlling interest in equity investment												(1,522)
Legal claim costs
Loss on retirement of debt
Termination of management agreement
Management fees										632	569	491
Total expenses including equity in earnings of affiliates										14,657	14,116	10,164
Income (loss) before income taxes										1,745	1,626	3,036
Provision (benefit) for income taxes										521	460	558
Net income (loss)										1,224	1,166	2,478
Net income attributable to noncontrolling interests										371	339	314
Net income (loss) attributable to HCA Holdings, Inc.										853	827	2,164
Comprehensive income (loss) attributable to HCA Holdings, Inc.										861	855	2,159
Eliminations [Member]
Supplemental Condensed Consolidating Financial Information [Line Items]
Revenues before provision for doubtful accounts
Provision for doubtful accounts
Revenues
Salaries and benefits
Supplies
Other operating expenses
Electronic health record incentive income
Equity in earnings of affiliates										1,875	1,668	2,531
Depreciation and amortization
Interest expense
Losses (gains) on sales of facilities
Gain on acquisition of controlling interest in equity investment
Legal claim costs
Loss on retirement of debt
Termination of management agreement
Management fees
Total expenses including equity in earnings of affiliates										1,875	1,668	2,531
Income (loss) before income taxes										(1,875)	(1,668)	(2,531)
Provision (benefit) for income taxes
Net income (loss)										(1,875)	(1,668)	(2,531)
Net income attributable to noncontrolling interests
Net income (loss) attributable to HCA Holdings, Inc.										(1,875)	(1,668)	(2,531)
Comprehensive income (loss) attributable to HCA Holdings, Inc.										$ (1,875)	$ (1,668)	$ (2,531)