SIGNIFICANT ACCOUNTING POLICIES - (Details)	12 Months Ended
	Dec. 31, 2016 plan Institution
Business Acquisition
Number of acute care hospitals operated by subsidiaries	79
Number of short-stay surgical hospitals	20
Number of outpatient centers	470
Number of facilities owned by subsidiaries	124
Number of health plans | plan	6
European Surgical Partners Ltd
Business Acquisition
Number of outpatient centers	9
United Surgical Partners International
Business Acquisition
Number of short-stay surgical hospitals	20
United Surgical Partners International | European Surgical Partners Ltd
Business Acquisition
Number of outpatient centers	9