Income Taxes	9 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 3 — INCOME TAXES During the nine months ended September 30, 2013, we finalized settlements with the IRS resolving all outstanding issues for HCA Inc.’s 2007, 2008 and 2009 tax years. We expect the IRS Examination Division will begin an audit of HCA Holdings, Inc.’s 2011 federal income tax return in 2014. Our liability for unrecognized tax benefits was $417 million, including accrued interest of $26 million, as of September 30, 2013 ($426 million and $14 million, respectively, as of December 31, 2012). Unrecognized tax benefits of $151 million ($125 million as of December 31, 2012) would affect the effective rate, if recognized. The provision for income taxes reflects $7 million and $1 million ($4 million and none, respectively, net of tax) of interest expense related to taxing authority examinations for the quarters ended September 30, 2013 and 2012, respectively, and $8 million and $20 million ($5 million and $13 million, respectively, net of tax) of reductions in interest expense related to taxing authority examinations for the nine months ended September 30, 2013 and 2012, respectively. Depending on the completion of examinations by federal, state or international taxing authorities, the resolution of any tax disputes, or the expiration of statutes of limitation for specific taxing jurisdictions, we believe it is reasonably possible our liability for unrecognized tax benefits may significantly increase or decline within the next 12 months. However, we are currently unable to estimate the range of any possible change.

Income Taxes

9 Months Ended

Sep. 30, 2013

NOTE 3 — INCOME TAXES

During the nine months ended September 30, 2013, we finalized settlements with the IRS resolving all outstanding issues for HCA Inc.’s 2007, 2008 and 2009 tax years. We expect the IRS Examination Division will begin an audit of HCA Holdings, Inc.’s 2011 federal income tax return in 2014.

Our liability for unrecognized tax benefits was $417 million, including accrued interest of $26 million, as of September 30, 2013 ($426 million and $14 million, respectively, as of December 31, 2012). Unrecognized tax benefits of $151 million ($125 million as of December 31, 2012) would affect the effective rate, if recognized. The provision for income taxes reflects $7 million and $1 million ($4 million and none, respectively, net of tax) of interest expense related to taxing authority examinations for the quarters ended September 30, 2013 and 2012, respectively, and $8 million and $20 million ($5 million and $13 million, respectively, net of tax) of reductions in interest expense related to taxing authority examinations for the nine months ended September 30, 2013 and 2012, respectively.

Depending on the completion of examinations by federal, state or international taxing authorities, the resolution of any tax disputes, or the expiration of statutes of limitation for specific taxing jurisdictions, we believe it is reasonably possible our liability for unrecognized tax benefits may significantly increase or decline within the next 12 months. However, we are currently unable to estimate the range of any possible change.