Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic and Diluted:
Net Income (Loss)	$ 261,834	$ 163,115
Less: Net income attributable to unvested restricted share grants	(45)	(129)
Net income attributable to UHS - basic	261,789	162,986
Net income attributable to UHS - diluted	$ 261,789	$ 162,986
Weighted average number of common shares - basic	67,204	70,535
Net effect of dilutive stock options and grants based on the treasury stock method	1,278	952
Weighted average number of common shares and equivalents - diluted	68,482	71,487
Earnings per basic share attributable to UHS:	$ 3.90	$ 2.31
Earnings per diluted share attributable to UHS:	$ 3.82	$ 2.28