Acquisitions and Divestitures (Divestitures Narrative) (Details)					3 Months Ended		6 Months Ended
	Apr. 01, 2015 USD ($) item	Mar. 01, 2015 USD ($) item	Feb. 01, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Jun. 30, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Jun. 30, 2015 USD ($) item	Jun. 30, 2014 USD ($)	Jan. 01, 2015 item
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Hospitals Sold							7
Proceeds from Divestiture of Businesses, Net of Cash Divested | $							$ 62,000,000	$ 12,000,000
Impairment of goodwill | $						$ 0	$ 6,000,000
Riverview Regional Medical Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date							Mar. 01, 2015
Number of licensed beds		281
Proceeds from Divestiture of Businesses, Net of Cash Divested | $		$ 25,000,000
Carolina Pines Regional Medical Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date							Jan. 01, 2015
Number of licensed beds									116
Proceeds from Divestiture of Businesses, Net of Cash Divested | $				$ 74,000,000
Williamson Memorial Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds					76		76
Harris Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date							Feb. 01, 2015
Number of licensed beds			133
Proceeds from Divestiture of Businesses, Net of Cash Divested | $			$ 5,000,000
Dallas Regional Medical Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date							Mar. 01, 2015
Number of licensed beds		202
Proceeds from Divestiture of Businesses, Net of Cash Divested | $		$ 25,000,000
Chesterfield General Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds	59
Chesterfield General Hospital and Marlboro Park Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date							Apr. 01, 2015
Proceeds from Divestiture of Businesses, Net of Cash Divested | $	$ 4,000,000
Marlboro Park Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds	102
Fallbrook Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds					47		47
Proceeds from Divestiture of Businesses, Net of Cash Divested | $					$ 3,000,000
Payson Regional Hospital [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of licensed beds					44		44
Proceeds from Divestiture of Businesses, Net of Cash Divested | $					$ 20,000,000
Impairment of goodwill | $					$ 6,000,000