Existing Lease Terms and Renewal Options for Each of UHS Hospital Facilities (Parenthetical) (Detail) - Universal Health Services, Inc	9 Months Ended
Sep. 30, 2021 Time Hospital RenewalOption
Operating Leased Assets [Line Items]
Number of renewal option at existing lease rate \| Hospital	3
McAllen Medical Center
Operating Leased Assets [Line Items]
Number of renewal option at existing lease rate \| Time	1
Renewal option term at existing lease rate	5 years
Renewal option at existing lease rate expiration year	2031
Wellington Regional Medical Center
Operating Leased Assets [Line Items]
Number of renewal options at fair market value lease rates \| RenewalOption	2
Renewal options term at fair market value lease rates	5 years
Wellington Regional Medical Center \| Minimum
Operating Leased Assets [Line Items]
Renewal options at fair market value lease rates expiration year	2022
Wellington Regional Medical Center \| Maximum
Operating Leased Assets [Line Items]
Renewal options at fair market value lease rates expiration year	2031

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Operating leases, renewal options term at existing lease rate.

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