Subsequent Events (Narrative) (Details) $ in Millions		3 Months Ended
	May 01, 2017 USD ($) item	Mar. 31, 2016 USD ($)
Subsequent Event [Line Items]
Proceeds from Divestiture of Businesses, Net of Cash Divested | $		$ 12
Subsequent Event [Member] | AllianceHealth Pryor [Member]
Subsequent Event [Line Items]
Disposal Date	May 01, 2017
Number of licensed beds	52
Proceeds from Divestiture of Businesses, Net of Cash Divested | $	$ 1
Subsequent Event [Member] | Stringfellow Memorial Hospital [Member]
Subsequent Event [Line Items]
Disposal Date	May 01, 2017
Number of licensed beds	125
Proceeds from Divestiture of Businesses, Net of Cash Divested | $	$ 14
Subsequent Event [Member] | Curae Health, Inc. [Member]
Subsequent Event [Line Items]
Disposal Date	May 01, 2017
Proceeds from Divestiture of Businesses, Net of Cash Divested | $	$ 32
Subsequent Event [Member] | Merit Health Gilmore Memorial [Member]
Subsequent Event [Line Items]
Number of licensed beds	95
Subsequent Event [Member] | Merit Health Batesville [Member]
Subsequent Event [Line Items]
Number of licensed beds	112
Subsequent Event [Member] | Steward Health, Inc. [Member]
Subsequent Event [Line Items]
Disposal Date	May 01, 2017
Proceeds from Divestiture of Businesses, Net of Cash Divested | $	$ 304
Subsequent Event [Member] | Easton Hospital [Member]
Subsequent Event [Line Items]
Number of licensed beds	196
Subsequent Event [Member] | Sharon Regional Health System [Member]
Subsequent Event [Line Items]
Number of licensed beds	258
Subsequent Event [Member] | Northside Medical Center [Member]
Subsequent Event [Line Items]
Number of licensed beds	355
Subsequent Event [Member] | Trumbull Memorial Hospital [Member]
Subsequent Event [Line Items]
Number of licensed beds	311
Subsequent Event [Member] | Hillside Rehabilitation Hospital [Member]
Subsequent Event [Line Items]
Number of licensed beds	69
Subsequent Event [Member] | Wuesthoff Health System - Rockledge [Member]
Subsequent Event [Line Items]
Number of licensed beds	298
Subsequent Event [Member] | Wuesthoff Health System - Melbourne [Member]
Subsequent Event [Line Items]
Number of licensed beds	119
Subsequent Event [Member] | Sebastian River Medical Center [Member]
Subsequent Event [Line Items]
Number of licensed beds	154
Subsequent Event [Member] | Lake Area Medical Center [Member]
Subsequent Event [Line Items]
Number of licensed beds	88
Subsequent Event [Member] | Tomball Regional Medical Center [Member]
Subsequent Event [Line Items]
Number of licensed beds	350
Subsequent Event [Member] | South Texas Regional Medical Center [Member]
Subsequent Event [Line Items]
Number of licensed beds	67