Cost of Revenue	9 Months Ended
Sep. 30, 2015
Cost of Revenue [Abstract]
Cost of Revenue Disclosure	3. COST OF REVENUE Substantially all of the Company’s operating costs and expenses are “cost of revenue” items. Operating costs that could be classified as general and administrative by the Company would include the Company’s corporate office costs at its Franklin, Tennessee office and Naples, Florida office (which was the headquarters of HMA prior to the closing of the HMA merger), which collectively were $68 million and $89 million for the three months ended September 30, 2015 and 2014, respectively, and $202 million and $248 million for the nine months ended September 30, 2015 and 2014, respectively. During the three and nine months ended September 30, 2015, corporate office costs from the Naples, Florida office were lower than the three and nine months ended September 30, 2014 due to the integration of the HMA corporate functions. Included in these corporate office costs is stock-based compensation of $15 million and $13 million for the three months ended September 30, 2015 and 2014, respectively, and $44 million and $36 million for the nine months ended September 30, 2015 and 2014, respectively.

3. COST OF REVENUE

Substantially all of the Company’s operating costs and expenses are “cost of revenue” items. Operating costs that could be classified as general and administrative by the Company would include the Company’s corporate office costs at its Franklin, Tennessee office and Naples, Florida office (which was the headquarters of HMA prior to the closing of the HMA merger), which collectively were $68 million and $89 million for the three months ended September 30, 2015 and 2014, respectively, and $202 million and $248 million for the nine months ended September 30, 2015 and 2014, respectively. During the three and nine months ended September 30, 2015, corporate office costs from the Naples, Florida office were lower than the three and nine months ended September 30, 2014 due to the integration of the HMA corporate functions. Included in these corporate office costs is stock-based compensation of $15 million and $13 million for the three months ended September 30, 2015 and 2014, respectively, and $44 million and $36 million for the nine months ended September 30, 2015 and 2014, respectively.