Stock-Based Compensation - Assumption (Details) - UHS Holdco, Inc., (Parent) - Options	9 Months Ended
	Sep. 30, 2015 $ / shares
Assumptions used in determining the fair value of stock options granted under the Black-Scholes model
Risk-free interest rate (as a percent)	1.70%
Expected volatility (as a percent)	27.00%
Expected option life	5 years 2 months 23 days
Black-Scholes Value of options (in dollars per share)	$ 0.20