Interim Condensed Consolidated Financial Statements - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013 Hospital	Sep. 30, 2012	Mar. 31, 2011	Sep. 30, 2013 State Surgery_Center Hospital	Sep. 30, 2012	Nov. 22, 2010
Summary Of Significant Accounting Policies [Line Items]
Ownership Percentage held by parent						100.00%
Initial public offering of shares common stock			87,719,300
Number of owned and operated hospitals	162			162
Number of freestanding surgery centers				114
Number of facilities locations				20
General and administrative expense	$ 76	$ 62		$ 207	$ 174
Adjustments to Medicare revenues					188
Adjustment and related expenses added to income before income taxes					170
Adjustment and related expenses added to income before income taxes in diluted per share					$ 0.22
Rural Floor Provision Settlement Effect [Member]
Summary Of Significant Accounting Policies [Line Items]
Adjustments to Medicare revenues					271
Implementation of Revised Supplemental Security Income Ratios [Member]
Summary Of Significant Accounting Policies [Line Items]
Adjustments to Medicare revenues					$ 83