Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interest	Common Stock Class A	Common Stock Class B	Common Stock Class C	Common Stock Class D	Cumulative Dividends	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	UHS Common Stockholders' Equity	Noncontrolling Interest
Balance at Dec. 31, 2023	$ 6,196,715		$ 66	$ 599	$ 7	$ 0	$ (659,890)	$ 6,798,930	$ 9,289	$ 6,149,001	$ 47,714
Balance at Dec. 31, 2023		$ 5,191
Common Stock
Issued/(converted)	3,411			10				3,401		3,411
Repurchased, including excise tax	(162,091)			(9)				(162,082)		(162,091)
Restricted share-based compensation expense	5,100							5,100		5,100
Dividends paid and accrued	(13,546)						(13,546)			(13,546)
Stock option expense	14,381							14,381		14,381
Distributions to noncontrolling interests	(3,831)	(649)									(3,831)
Purchase (sale) of ownership interests by (from) minority members	1,721										1,721
Comprehensive income:
Net income (loss) to UHS / noncontrolling interests	265,377	445						261,834		261,834	3,543
Other								(17)	17
Foreign currency translation adjustments, net of income tax	(1,393)								(1,393)	(1,393)
Subtotal - comprehensive income	263,984							261,817	(1,376)	260,441	3,543
Subtotal attributable to redeemable noncontrolling interest		445
Balance at Mar. 31, 2024	6,305,844		66	600	7	0	(673,436)	6,921,547	7,913	6,256,697	49,147
Balance at Mar. 31, 2024		4,987
Balance at Dec. 31, 2024	6,749,523		66	577	7	0	(713,705)	7,372,061	7,201	6,666,207	83,316
Balance at Dec. 31, 2024		13,293
Common Stock
Issued/(converted)	3,836			7				3,829		3,836
Repurchased, including excise tax	(224,452)			(12)				(224,440)		(224,452)
Restricted share-based compensation expense	11,842							11,842		11,842
Dividends paid and accrued	(13,255)						(13,255)			(13,255)
Stock option expense	9,437							9,437		9,437
Distributions to noncontrolling interests	(5,912)										(5,912)
Purchase (sale) of ownership interests by (from) minority members	4,485										4,485
Comprehensive income:
Net income (loss) to UHS / noncontrolling interests	321,597	31						316,680		316,680	4,917
Foreign currency translation adjustments, net of income tax	15,309								15,309	15,309
Subtotal - comprehensive income	336,906							316,680	15,309	331,989	4,917
Subtotal attributable to redeemable noncontrolling interest		31
Balance at Mar. 31, 2025	6,872,410		$ 66	$ 572	$ 7	$ 0	$ (726,960)	$ 7,489,409	$ 22,510	$ 6,785,604	$ 86,806
Balance at Mar. 31, 2025	$ 13,000	$ 13,324