Supplemental Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 658	$ 414	$ 462	$ 705
Accounts receivable, net	5,472	5,208
Inventories	1,211	1,179
Deferred income taxes	500	489
Other	931	747
Total current assets	8,772	8,037
Property and equipment, net	13,721	13,619
Investments of insurance subsidiaries	426	448
Investments in and advances to affiliates	150	121
Goodwill and other intangible assets	5,909	5,903
Deferred loan costs	230	237
Other	614	466
Total assets	29,822	28,831
Current liabilities:
Accounts payable	1,717	1,803
Accrued salaries	1,140	1,193
Other accrued expenses	1,992	1,913
Long-term debt due within one year	1,046	786
Total current liabilities	5,895	5,695
Long-term debt	27,942	27,590
Intercompany balances
Professional liability risks	1,019	949
Income taxes and other liabilities	1,554	1,525
Total liabilities	36,410	35,759
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(7,990)	(8,270)
Noncontrolling interests	1,402	1,342
Total stockholders' deficit	(6,588)	(6,928)
Total liabilities and stockholders' deficit	29,822	28,831
HCA Holdings, Inc. Issuer [Member]
Current assets:
Cash and cash equivalents				22
Accounts receivable, net
Inventories
Deferred income taxes	500	489
Other
Total current assets	500	489
Property and equipment, net
Investments of insurance subsidiaries
Investments in and advances to affiliates	21,308	20,356
Goodwill and other intangible assets
Deferred loan costs	27	30
Other	406	250
Total assets	22,241	21,125
Current liabilities:
Accounts payable	4	1
Accrued salaries
Other accrued expenses	407	272
Long-term debt due within one year
Total current liabilities	411	273
Long-term debt	2,525	2,525
Intercompany balances	26,762	26,107
Professional liability risks
Income taxes and other liabilities	533	490
Total liabilities	30,231	29,395
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(7,990)	(8,270)
Noncontrolling interests
Total stockholders' deficit	(7,990)	(8,270)
Total liabilities and stockholders' deficit	22,241	21,125
HCA Inc. Issuer [Member]
Current assets:
Cash and cash equivalents
Accounts receivable, net
Inventories
Deferred income taxes
Other
Total current assets
Property and equipment, net
Investments of insurance subsidiaries
Investments in and advances to affiliates
Goodwill and other intangible assets
Deferred loan costs	203	207
Other
Total assets	203	207
Current liabilities:
Accounts payable
Accrued salaries
Other accrued expenses	330	353
Long-term debt due within one year	952	702
Total current liabilities	1,282	1,055
Long-term debt	25,047	24,701
Intercompany balances	(10,203)	(10,513)
Professional liability risks
Income taxes and other liabilities	260	296
Total liabilities	16,386	15,539
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(16,183)	(15,332)
Noncontrolling interests
Total stockholders' deficit	(16,183)	(15,332)
Total liabilities and stockholders' deficit	203	207
Subsidiary Guarantors [Member]
Current assets:
Cash and cash equivalents	215	112	152	383
Accounts receivable, net	2,709	2,565
Inventories	707	692
Deferred income taxes
Other	344	301
Total current assets	3,975	3,670
Property and equipment, net	7,676	7,504
Investments of insurance subsidiaries
Investments in and advances to affiliates	15	13
Goodwill and other intangible assets	1,694	1,695
Deferred loan costs
Other	19	48
Total assets	13,379	12,930
Current liabilities:
Accounts payable	1,081	1,169
Accrued salaries	656	694
Other accrued expenses	433	464
Long-term debt due within one year	50	45
Total current liabilities	2,220	2,372
Long-term debt	183	181
Intercompany balances	(20,098)	(19,428)
Professional liability risks
Income taxes and other liabilities	543	521
Total liabilities	(17,152)	(16,354)
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	30,412	29,185
Noncontrolling interests	119	99
Total stockholders' deficit	30,531	29,284
Total liabilities and stockholders' deficit	13,379	12,930
Subsidiary Non-Guarantors [Member]
Current assets:
Cash and cash equivalents	443	302	310	300
Accounts receivable, net	2,763	2,643
Inventories	504	487
Deferred income taxes
Other	587	446
Total current assets	4,297	3,878
Property and equipment, net	6,045	6,115
Investments of insurance subsidiaries	426	448
Investments in and advances to affiliates	135	108
Goodwill and other intangible assets	4,215	4,208
Deferred loan costs
Other	189	168
Total assets	15,307	14,925
Current liabilities:
Accounts payable	632	633
Accrued salaries	484	499
Other accrued expenses	822	824
Long-term debt due within one year	44	39
Total current liabilities	1,982	1,995
Long-term debt	187	183
Intercompany balances	3,539	3,834
Professional liability risks	1,019	949
Income taxes and other liabilities	218	218
Total liabilities	6,945	7,179
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	7,079	6,503
Noncontrolling interests	1,283	1,243
Total stockholders' deficit	8,362	7,746
Total liabilities and stockholders' deficit	15,307	14,925
Eliminations [Member]
Current assets:
Cash and cash equivalents
Accounts receivable, net
Inventories
Deferred income taxes
Other
Total current assets
Property and equipment, net
Investments of insurance subsidiaries
Investments in and advances to affiliates	(21,308)	(20,356)
Goodwill and other intangible assets
Deferred loan costs
Other
Total assets	(21,308)	(20,356)
Current liabilities:
Accounts payable
Accrued salaries
Other accrued expenses
Long-term debt due within one year
Total current liabilities
Long-term debt
Intercompany balances
Professional liability risks
Income taxes and other liabilities
Total liabilities
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(21,308)	(20,356)
Noncontrolling interests
Total stockholders' deficit	(21,308)	(20,356)
Total liabilities and stockholders' deficit	$ (21,308)	$ (20,356)