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Supplemental Condensed Consolidating Financial Information - Additional Information (Detail)	Jun. 30, 2015
Guarantors
Supplementary Information [Line Items]
Percentage of ownership interests	100.00%

X

- Definition

Percentage Of Ownership Interests

+ References

No definition available.

+ Details

Name:	uhs_PercentageOfOwnershipInterests
Namespace Prefix:	uhs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Supplementary Information [Line Items]

+ References

No definition available.

+ Details

Name:	uhs_SupplementaryInformationLineItems
Namespace Prefix:	uhs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_GuarantorSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: