Income Taxes - Schedule of Reconciliation of Federal Statutory Rate to Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	2.30%	2.20%	2.00%
Change in liability for uncertain tax positions	0.50%		1.00%
Nontaxable gain on acquisition of controlling interest in equity investment			(13.80%)
Tax exempt interest income	(0.20%)	(0.20%)	(0.20%)
Other items, net	0.30%	(1.40%)	(1.40%)
Effective income tax rate on income applicable to HCA Holdings, Inc.	37.90%	35.60%	22.60%
Income attributable to noncontrolling interests from consolidated partnerships	(5.70%)	(4.90%)	(2.40%)
Effective income tax rate on income before income taxes	32.20%	30.70%	20.20%