Existing Lease Terms and Renewal Options for Each of UHS Hospital Facilities (Parenthetical) (Detail) - Universal Health Services, Inc	3 Months Ended
Mar. 31, 2019 Time RenewalOption
Operating Leased Assets [Line Items]
Number of renewal option at existing lease rates	3
McAllen Medical Center
Operating Leased Assets [Line Items]
Number of renewal option at existing lease rates	1
Renewal option term at existing lease rates	5 years
Renewal option at existing lease rates expiration year	2031
Wellington Regional Medical Center And Southwest Healthcare System
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 And Southwest Healthcare System \| Maximum
Operating Leased Assets [Line Items]
Renewal option at fair market value lease rates expiration year	2031
Wellington Regional Medical Center And Southwest Healthcare System \| Minimum
Operating Leased Assets [Line Items]
Renewal option at fair market value lease rates expiration year	2022

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Operating leases, renewal options term at existing lease rates.

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