XML 22 R78.htm IDEA: XBRL DOCUMENT v2.4.1.9
Schedule of Plan Assets Category (Detail)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]    
Total 100.00%uhs_DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotal 100.00%uhs_DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotal
Equity Securities    
Defined Benefit Plan Disclosure [Line Items]    
Asset Allocation 21.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember		 23.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
Fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Asset Allocation 76.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_RealEstateMember		 74.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_RealEstateMember
Other    
Defined Benefit Plan Disclosure [Line Items]    
Asset Allocation 3.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_OtherContractMember		 3.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_OtherContractMember