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Supplemental Condensed Consolidating Financial Information - Additional Information (Detail) (Guarantors)	Jun. 30, 2012
Guarantors
Condensed Financial Statements, Captions [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

- Details

Name:	us-gaap_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration