Share-Based Compensation - Assumption (Details) - Parent Issuer UHS - Options - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Assumptions used in determining the fair value of stock options granted under the Black-Scholes model
Risk-free interest rate (as a percent)	1.50%	1.70%
Expected volatility (as a percent)	30.90%	26.90%
Expected option life	5 years 9 months 29 days	5 years 1 month 6 days
Black-Scholes Value of options (in dollars per share)	$ 0.33	$ 0.19