Supplemental Condensed Consolidating Financial Information and Other Collateral-Related Information - Schedule of Condensed Consolidating Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current assets:
Cash and cash equivalents	$ 705	$ 373	$ 411	$ 312
Accounts receivable, net	4,672	4,533
Inventories	1,086	1,054
Deferred income taxes	385	594
Other	915	679
Total current assets	7,763	7,233
Property and equipment, net	13,185	12,834
Investments of insurance subsidiaries	515	548
Investments in and advances to affiliates	104	101
Goodwill and other intangible assets	5,539	5,251
Deferred loan costs	290	290
Other	679	641
Total assets	28,075	26,898
Current liabilities:
Accounts payable	1,768	1,597
Accrued salaries	1,120	965
Other accrued expenses	1,849	1,585
Long-term debt due within one year	1,435	1,407
Total current liabilities	6,172	5,554
Long-term debt	27,495	25,645
Professional liability risks	973	993
Income taxes and other liabilities	1,776	1,720
Total liabilities	36,416	33,912
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(9,660)	(8,258)
Noncontrolling interests	1,319	1,244
Total stockholders' deficit	(8,341)	(7,014)	(10,794)	(7,978)
Total liabilities and stockholders' deficit	28,075	26,898
HCA Holdings, Inc. Issuer [Member]
Current assets:
Cash and cash equivalents	22		6
Deferred income taxes	385	594
Other	122	50
Total current assets	529	644
Investments in and advances to affiliates	18,481	16,813
Deferred loan costs	32	22
Other	469	450
Total assets	19,511	17,929
Current liabilities:
Other accrued expenses	30	15
Total current liabilities	30	15
Long-term debt	2,525	1,525
Intercompany balances	26,131	24,109
Income taxes and other liabilities	485	538
Total liabilities	29,141	26,187
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(9,660)	(8,258)
Total stockholders' deficit	(9,660)	(8,258)
Total liabilities and stockholders' deficit	19,511	17,929
HCA Inc. Issuer [Member]
Current assets:
Deferred loan costs	258	268
Total assets	258	268
Current liabilities:
Other accrued expenses	567	367
Long-term debt due within one year	1,360	1,347
Total current liabilities	1,927	1,714
Long-term debt	24,304	23,454
Intercompany balances	(12,407)	(12,833)
Income taxes and other liabilities	442	415
Total liabilities	14,266	12,750
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(14,008)	(12,482)
Total stockholders' deficit	(14,008)	(12,482)
Total liabilities and stockholders' deficit	258	268
Subsidiary Guarantors [Member]
Current assets:
Cash and cash equivalents	383	115	156	95
Accounts receivable, net	2,448	2,429
Inventories	629	602
Other	342	184
Total current assets	3,802	3,330
Property and equipment, net	7,417	7,088
Investments in and advances to affiliates	16	15
Goodwill and other intangible assets	1,697	1,605
Other	31	21
Total assets	12,963	12,059
Current liabilities:
Accounts payable	1,203	899
Accrued salaries	638	568
Other accrued expenses	464	449
Long-term debt due within one year	39	28
Total current liabilities	2,344	1,944
Long-term debt	173	110
Intercompany balances	(17,130)	(15,157)
Income taxes and other liabilities	629	556
Total liabilities	(13,984)	(12,547)
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	26,847	24,508
Noncontrolling interests	100	98
Total stockholders' deficit	26,947	24,606
Total liabilities and stockholders' deficit	12,963	12,059
Subsidiary Non-Guarantors [Member]
Current assets:
Cash and cash equivalents	300	258	249	217
Accounts receivable, net	2,224	2,104
Inventories	457	452
Other	451	445
Total current assets	3,432	3,259
Property and equipment, net	5,768	5,746
Investments of insurance subsidiaries	515	548
Investments in and advances to affiliates	88	86
Goodwill and other intangible assets	3,842	3,646
Other	179	170
Total assets	13,824	13,455
Current liabilities:
Accounts payable	565	698
Accrued salaries	482	397
Other accrued expenses	788	754
Long-term debt due within one year	36	32
Total current liabilities	1,871	1,881
Long-term debt	493	556
Intercompany balances	3,406	3,881
Professional liability risks	973	993
Income taxes and other liabilities	220	211
Total liabilities	6,963	7,522
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	5,642	4,787
Noncontrolling interests	1,219	1,146
Total stockholders' deficit	6,861	5,933
Total liabilities and stockholders' deficit	13,824	13,455
Eliminations [Member]
Current assets:
Investments in and advances to affiliates	(18,481)	(16,813)
Total assets	(18,481)	(16,813)
Current liabilities:
Stockholders' (deficit) equity attributable to HCA Holdings, Inc.	(18,481)	(16,813)
Total stockholders' deficit	(18,481)	(16,813)
Total liabilities and stockholders' deficit	$ (18,481)	$ (16,813)