Segment Reporting - Additional Information (Detail)	9 Months Ended
Segment Reporting - Additional Information (Detail)	Sep. 30, 2025 Segment
Segment Reporting [Abstract]
Number of reportable segments	2
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	Chief Executive Officer [Member], srt:PresidentMember, Division Presidents [Member]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The primary profitability measurement utilized by the President and Chief Executive Officer as well as the Presidents of each operating segment is segment income before income taxes. Segment income before income taxes is utilized by the CODM group during the annual budgeting process and during their reviews of our monthly operating results to monitor each segment’s operating results as compared to prior periods and the respective operating budgets.
Segment Reporting, Expense Information Used by CODM, Description	The expenses included in our non-segment operating expenses below include centralized services including, but not limited to, information technology, purchasing, reimbursement, accounting and finance, taxation, legal, advertising and design and construction.

UNIVERSAL HEALTH SERVICES INC 10-Q