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)	7,394			8				7,386		7,394
Repurchased, including excise tax	(239,938)			(13)				(239,925)		(239,938)
Restricted share-based compensation expense	17,879							17,879		17,879
Dividends paid and accrued	(27,125)						(27,125)			(27,125)
Stock option expense	27,669							27,669		27,669
Distributions to noncontrolling interests	(4,440)	(649)									(4,440)
Purchase (sale) of ownership interests by (from) minority members	13,869										13,869
Comprehensive income:
Net income (loss) to UHS / noncontrolling interests	559,276	876						550,986		550,986	8,290
Other								(17)	17
Foreign currency translation adjustments, net of income tax	(494)								(494)	(494)
Subtotal - comprehensive income	558,782							550,969	(477)	550,492	8,290
Subtotal attributable to redeemable noncontrolling interest		876
Balance at Jun. 30, 2024	6,550,805		66	594	7	0	(687,015)	7,162,908	8,812	6,485,372	65,433
Balance at Jun. 30, 2024		5,418
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
Common Stock
Issued/(converted)	3,983			(2)				3,985		3,983
Repurchased, including excise tax	(77,847)			(4)				(77,843)		(77,847)
Restricted share-based compensation expense	12,779							12,779		12,779
Dividends paid and accrued	(13,579)						(13,579)			(13,579)
Stock option expense	13,288							13,288		13,288
Distributions to noncontrolling interests	(609)										(609)
Purchase (sale) of ownership interests by (from) minority members	12,148										12,148
Comprehensive income:
Net income (loss) to UHS / noncontrolling interests	293,899	431						289,152		289,152	4,747
Foreign currency translation adjustments, net of income tax	899								899	899
Subtotal - comprehensive income	294,798							289,152	899	290,051	4,747
Subtotal attributable to redeemable noncontrolling interest		431
Balance at Jun. 30, 2024	6,550,805		66	594	7	0	(687,015)	7,162,908	8,812	6,485,372	65,433
Balance at Jun. 30, 2024		5,418
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)	8,315			8				8,307		8,315
Repurchased, including excise tax	(381,090)			(21)				(381,069)		(381,090)
Restricted share-based compensation expense	27,312							27,312		27,312
Dividends paid and accrued	(26,378)						(26,378)			(26,378)
Stock option expense	17,548							17,548		17,548
Reclass of noncontrolling interests to redeemable noncontrolling interests	(38,523)	38,523									(38,523)
Change in redemption amount of redeemable noncontrolling interest	(2,312)	2,312						(2,312)		(2,312)
Distributions to noncontrolling interests	(7,227)	(2,395)									(7,227)
Purchase (sale) of ownership interests by (from) minority members	7,161	4,232									7,161
Comprehensive income:
Net income (loss) to UHS / noncontrolling interests	680,636	3,604						669,898		669,898	10,738
Foreign currency translation adjustments, net of income tax	50,548								50,548	50,548
Subtotal - comprehensive income	731,184							669,898	50,548	720,446	10,738
Subtotal attributable to redeemable noncontrolling interest		3,604
Balance at Jun. 30, 2025	7,085,513		66	564	7	0	(740,083)	7,711,745	57,749	7,030,048	55,465
Balance at Jun. 30, 2025	60,000	59,569
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		13,324
Common Stock
Issued/(converted)	4,479			1				4,478		4,479
Repurchased, including excise tax	(156,638)			(9)				(156,629)		(156,638)
Restricted share-based compensation expense	15,470							15,470		15,470
Dividends paid and accrued	(13,123)						(13,123)			(13,123)
Stock option expense	8,111							8,111		8,111
Reclass of noncontrolling interests to redeemable noncontrolling interests	(38,523)	38,523									(38,523)
Change in redemption amount of redeemable noncontrolling interest	(2,312)	2,312						(2,312)		(2,312)
Distributions to noncontrolling interests	(1,315)	(2,395)									(1,315)
Purchase (sale) of ownership interests by (from) minority members	2,676	4,232									2,676
Comprehensive income:
Net income (loss) to UHS / noncontrolling interests	359,039	3,573						353,218		353,218	5,821
Foreign currency translation adjustments, net of income tax	35,239								35,239	35,239
Subtotal - comprehensive income	394,278							353,218	35,239	388,457	5,821
Subtotal attributable to redeemable noncontrolling interest		3,573
Balance at Jun. 30, 2025	7,085,513		$ 66	$ 564	$ 7	$ 0	$ (740,083)	$ 7,711,745	$ 57,749	$ 7,030,048	$ 55,465
Balance at Jun. 30, 2025	$ 60,000	$ 59,569