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Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified | Total | Redeemable Interest | Cumulative Dividends | UHS Common Stockholders' Equity | Class A Common | Class B Common | Class C Common | Class D Common | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 |  | $ 218,266 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2011 | 2,347,118 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | (147,515)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | 2,296,352 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember | 66 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassAMember | 893 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember | 7 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassCMember | 0 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = uhs_CommonClassDMember | 2,494,076 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (51,575)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 50,766 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common Stock |  |  |  |  |  |  |  |  |  |  |
Issued/(converted) including tax benefits from exercise of stock options | 21,684 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions |  |  | 21,684 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  | 14 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember |  |  | 21,670 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Repurchased | (19,154)us-gaap_StockRepurchasedDuringPeriodValue |  |  | (19,154)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  | (4)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember |  |  | (19,150)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Restricted share-based compensation expense | 2,308 us-gaap_RestrictedStockExpense |  |  | 2,308 us-gaap_RestrictedStockExpense / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 2,308 us-gaap_RestrictedStockExpense / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Dividends paid | (58,395)us-gaap_Dividends |  | (58,395)us-gaap_Dividends / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | (58,395)us-gaap_Dividends / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  |  |
Stock option expense | 20,083 us-gaap_StockOptionPlanExpense |  |  | 20,083 us-gaap_StockOptionPlanExpense / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 20,083 us-gaap_StockOptionPlanExpense / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Distributions to noncontrolling interests | (7,933)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | (18,961)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  | (7,933)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Sale of minority ownership interests in majority owned businesses | (832)us-gaap_MinorityInterestDecreaseFromRedemptions |  |  |  |  |  |  |  |  |  | (832)us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Comprehensive income: |  |  |  |  |  |  |  |  |  |  |
Net income | 454,049 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests |  |  | 443,446 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 443,446 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 10,603 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Net income |  | 34,998 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Amortization of terminated hedge (net of income tax effect of $120) | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax |  |  | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Unrealized derivative gains and losses on cash flow hedges (net of income tax effect of $6,529 in 2014, 6,390 in 2013, $2,528 in 2012) | 4,149 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax |  |  | 4,149 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | 4,149 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Minimum pension liability (net of income tax effect of $5,356 in 2014, 5,670 in 2013, $1,898 in 2012) | 3,088 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |  |  | 3,088 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | 3,088 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Subtotal-comprehensive income | 461,070 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest |  |  | 450,467 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 443,446 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 7,021 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 10,603 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Subtotal-comprehensive income |  | 34,998 uhs_ComprehensiveIncomeNetOfTaxAttributableToRedeemableNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2012 |  | 234,303 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2012 | 2,765,949 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | (205,910)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | 2,713,345 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember | 66 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassAMember | 903 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember | 7 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassCMember | 0 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = uhs_CommonClassDMember | 2,962,433 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (44,154)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 52,604 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common Stock |  |  |  |  |  |  |  |  |  |  |
Issued/(converted) including tax benefits from exercise of stock options | 26,880 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions |  |  | 26,880 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  | 11 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember |  |  | 26,869 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Repurchased | (27,201)us-gaap_StockRepurchasedDuringPeriodValue |  |  | (27,201)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  | (4)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember |  |  | (27,197)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Restricted share-based compensation expense | 664 us-gaap_RestrictedStockExpense |  |  | 664 us-gaap_RestrictedStockExpense / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 664 us-gaap_RestrictedStockExpense / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Dividends paid | (19,621)us-gaap_Dividends |  | (19,621)us-gaap_Dividends / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | (19,621)us-gaap_Dividends / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  |  |
Stock option expense | 25,835 us-gaap_StockOptionPlanExpense |  |  | 25,835 us-gaap_StockOptionPlanExpense / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 25,835 us-gaap_StockOptionPlanExpense / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Distributions to noncontrolling interests | (13,039)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | (48,290)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  | (13,039)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Other | (511)us-gaap_NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable |  |  |  |  |  |  |  |  |  | (511)us-gaap_NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Comprehensive income: |  |  |  |  |  |  |  |  |  |  |
Net income | 521,929 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests |  |  | 510,733 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 510,733 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 11,196 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Net income |  | 32,094 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments | 0 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  |  |  |  |  |  |  |  |
Amortization of terminated hedge (net of income tax effect of $120) | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax |  |  | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Unrealized derivative gains and losses on cash flow hedges (net of income tax effect of $6,529 in 2014, 6,390 in 2013, $2,528 in 2012) | 10,573 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax |  |  | 10,573 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | 10,573 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Minimum pension liability (net of income tax effect of $5,356 in 2014, 5,670 in 2013, $1,898 in 2012) | 8,987 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |  |  | 8,987 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | 8,987 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Subtotal-comprehensive income | 541,273 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest |  |  | 530,077 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 510,733 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 19,344 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 11,196 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Subtotal-comprehensive income |  | 32,094 uhs_ComprehensiveIncomeNetOfTaxAttributableToRedeemableNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2013 | 218,107 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests | 218,107 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2013 | 3,300,229 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | 225,531 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | 3,249,979 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember | 66 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassAMember | 910 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember | 7 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassCMember | 0 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = uhs_CommonClassDMember | 3,499,337 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 24,810 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 50,250 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Common Stock |  |  |  |  |  |  |  |  |  |  |
Issued/(converted) including tax benefits from exercise of stock options | 41,801 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions |  |  | 41,801 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  | 14 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember |  |  | 41,787 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Repurchased | (100,749)us-gaap_StockRepurchasedDuringPeriodValue |  |  | (100,749)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  | (10)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember |  |  | (100,739)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Restricted share-based compensation expense | 491 us-gaap_RestrictedStockExpense |  |  | 491 us-gaap_RestrictedStockExpense / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 491 us-gaap_RestrictedStockExpense / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Dividends paid | (29,665)us-gaap_Dividends |  | (29,665)us-gaap_Dividends / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | (29,665)us-gaap_Dividends / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  |  |
Stock option expense | 29,168 us-gaap_StockOptionPlanExpense |  |  | 29,168 us-gaap_StockOptionPlanExpense / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 29,168 us-gaap_StockOptionPlanExpense / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Distributions to noncontrolling interests | (7,666)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | (26,016)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  | (7,666)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Other | 358 us-gaap_NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable |  |  |  |  |  |  |  |  |  | 358 us-gaap_NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Comprehensive income: |  |  |  |  |  |  |  |  |  |  |
Net income | 557,535 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests |  |  | 545,343 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 545,343 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 12,192 uhs_NetIncomeExcludingRedeemableNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Net income |  | 47,461 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments | (2,431)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  | (2,431)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | (2,431)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Amortization of terminated hedge (net of income tax effect of $120) | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax |  |  | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | (216)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Unrealized derivative gains and losses on cash flow hedges (net of income tax effect of $6,529 in 2014, 6,390 in 2013, $2,528 in 2012) | 11,139 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax |  |  | 11,139 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | 11,139 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Minimum pension liability (net of income tax effect of $5,356 in 2014, 5,670 in 2013, $1,898 in 2012) | (8,914)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax |  |  | (8,914)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  |  | (8,914)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Subtotal-comprehensive income | 557,113 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest |  |  | 544,921 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember |  |  |  |  | 545,343 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (422)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 12,192 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Subtotal-comprehensive income |  | 47,461 uhs_ComprehensiveIncomeNetOfTaxAttributableToRedeemableNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2014 | 239,552 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests | 239,552 us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests / us-gaap_StatementScenarioAxis = uhs_RedeemableInterestMember |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2014 | $ 3,791,080 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | $ 255,196 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = uhs_CumulativeDividendsMember | $ 3,735,946 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementScenarioAxis = us-gaap_StockholdersEquityTotalMember | $ 66 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassAMember | $ 914 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassBMember | $ 7 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonClassCMember | $ 0 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = uhs_CommonClassDMember | $ 4,015,387 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 25,232 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 55,134 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41638-113959 + Details
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