Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 3 — INCOME TAXES During 2014, the IRS Examination Division began an audit of HCA Holdings Inc.’s 2011 and 2012 federal income tax returns. We are also subject to examination by state and foreign taxing authorities. Our liability for unrecognized tax benefits was $541 million, including accrued interest of $69 million, as of September 30, 2015 ($548 million and $58 million, respectively, as of December 31, 2014). Unrecognized tax benefits of $228 million ($205 million as of December 31, 2014) would affect the effective rate, if recognized. The provision for income taxes reflects $2 million and $3 million ($1 million and $2 million, respectively, net of tax) of interest expense related to taxing authority examinations for the quarters ended September 30, 2015 and 2014, respectively. The provision for income taxes reflects $6 million and $11 million ($4 million and $7 million, net of tax) of interest expense related to taxing authority examinations for the nine months ended September 30, 2015 and 2014, respectively. Depending on the resolution of any IRS, state and foreign tax disputes, the completion of examinations by federal, state or foreign taxing authorities, or the expiration of statutes of limitation for specific taxing jurisdictions, we believe it is reasonably possible that our liability for unrecognized tax benefits may significantly increase or decrease 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, 2015

NOTE 3 — INCOME TAXES

During 2014, the IRS Examination Division began an audit of HCA Holdings Inc.’s 2011 and 2012 federal income tax returns. We are also subject to examination by state and foreign taxing authorities.

Our liability for unrecognized tax benefits was $541 million, including accrued interest of $69 million, as of September 30, 2015 ($548 million and $58 million, respectively, as of December 31, 2014). Unrecognized tax benefits of $228 million ($205 million as of December 31, 2014) would affect the effective rate, if recognized. The provision for income taxes reflects $2 million and $3 million ($1 million and $2 million, respectively, net of tax) of interest expense related to taxing authority examinations for the quarters ended September 30, 2015 and 2014, respectively. The provision for income taxes reflects $6 million and $11 million ($4 million and $7 million, net of tax) of interest expense related to taxing authority examinations for the nine months ended September 30, 2015 and 2014, respectively.

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