XML 70 R60.htm IDEA: XBRL DOCUMENT v2.4.1.9
Income Taxes (Details) (USD $)
 12 Months Ended 24 Months Ended
Dec. 31, 2014
Rate
Dec. 31, 2013
Rate
Dec. 31, 2012
Dec. 31, 2010
Income Before Income Taxes [Abstract]        
Income before income taxes, Domestic $ 739,900,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 629,400,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 683,500,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic  
Income before income taxes, International 1,070,100,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 1,031,500,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 976,100,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign  
Income Before Income Taxes and Income (Loss) From Equity Method Investments 1,810,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,660,900,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,659,600,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments  
Income Tax Expense [Abstract]        
Income tax expense, current, Federal 356,100,000us-gaap_CurrentFederalTaxExpenseBenefit 246,300,000us-gaap_CurrentFederalTaxExpenseBenefit 163,300,000us-gaap_CurrentFederalTaxExpenseBenefit  
Income tax expense, current, State and local 38,100,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 30,600,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 40,100,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit  
Income tax expense, current, International 344,800,000us-gaap_CurrentForeignTaxExpenseBenefit 336,500,000us-gaap_CurrentForeignTaxExpenseBenefit 298,300,000us-gaap_CurrentForeignTaxExpenseBenefit  
Income tax expense, current 739,000,000us-gaap_CurrentIncomeTaxExpenseBenefit 613,400,000us-gaap_CurrentIncomeTaxExpenseBenefit 501,700,000us-gaap_CurrentIncomeTaxExpenseBenefit  
Income tax expense, deferred, Federal (106,400,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 300,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit 41,700,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit  
Income tax expense, deferred, State and local (2,300,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (3,600,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 4,700,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit  
Income tax expense, deferred, International (37,200,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (44,900,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (21,000,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit  
Income tax expense, deferred (145,900,000)us-gaap_DeferredIncomeTaxExpenseBenefit (48,200,000)us-gaap_DeferredIncomeTaxExpenseBenefit 25,400,000us-gaap_DeferredIncomeTaxExpenseBenefit  
Income tax expense 593,100,000us-gaap_IncomeTaxExpenseBenefit 565,200,000us-gaap_IncomeTaxExpenseBenefit 527,100,000us-gaap_IncomeTaxExpenseBenefit  
Reconciliation from the Statutory U.S. Federal Income Tax Rate to Effective Tax Rate [Abstract]        
Statutory U.S. federal income tax rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate  
State and local income taxes, net of federal income tax benefit 1.30%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes  
Reduction of tax on unremitted foreign earnings due to legal reorganization 0.00%omc_EffectiveIncomeTaxRateReconciliationReductionOfTaxOnUnremittedForeignEarningsDueToLegalReorganizationPercent 0.00%omc_EffectiveIncomeTaxRateReconciliationReductionOfTaxOnUnremittedForeignEarningsDueToLegalReorganizationPercent (1.30%)omc_EffectiveIncomeTaxRateReconciliationReductionOfTaxOnUnremittedForeignEarningsDueToLegalReorganizationPercent  
International tax rate differentials (3.30%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (3.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (3.30%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential  
Other (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments  
Effective tax rate 32.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations 34.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 31.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations  
Income tax benefit, merger expenses 11,400,000omc_Incometaxbenefitmergerexpenses 6,500,000omc_Incometaxbenefitmergerexpenses    
Effective tax rate, excluding merger expenses 33.20%omc_EffectiveIncomeTaxRateReconciliationPercentExcludingMergerExpenses 33.60%omc_EffectiveIncomeTaxRateReconciliationPercentExcludingMergerExpenses    
Reduction of income tax expense     53,000,000omc_ReductionOfIncomeTaxExpense  
Increase in income tax expense     16,000,000omc_IncreaseInIncomeTaxExpense  
Unrecognized Tax Benefits, Penalties and Interest [Abstract]        
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense 1,700,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 1,600,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 2,500,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 14,200,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 11,500,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued    
Deferred tax assets:        
Compensation and severance 311,900,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits 269,800,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits    
Tax loss and credit carryforwards 95,600,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards 149,100,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards    
Basis differences from acquisitions 38,000,000omc_BasisDifferencesArisingFromAcquisitions 28,700,000omc_BasisDifferencesArisingFromAcquisitions    
Basis differences from short-term assets and liabilities 27,800,000omc_BasisDifferencesFromShortTermAssetsAndLiabilities 28,200,000omc_BasisDifferencesFromShortTermAssetsAndLiabilities    
Other 33,000,000us-gaap_DeferredTaxAssetsOther 53,200,000us-gaap_DeferredTaxAssetsOther    
Deferred tax assets 506,300,000us-gaap_DeferredTaxAssetsGross 529,000,000us-gaap_DeferredTaxAssetsGross    
Valuation allowance (34,100,000)us-gaap_DeferredTaxAssetsValuationAllowance (56,800,000)us-gaap_DeferredTaxAssetsValuationAllowance    
Net deferred tax assets 472,200,000us-gaap_DeferredTaxAssetsNet 472,200,000us-gaap_DeferredTaxAssetsNet    
Deferred tax liabilities:        
Goodwill and intangible assets 706,100,000us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets 673,300,000us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets    
Financial instruments 263,100,000omc_DeferredTaxLiabilitiesFinancialInstruments 421,800,000omc_DeferredTaxLiabilitiesFinancialInstruments    
Unremitted foreign earnings 51,100,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings 114,500,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings    
Basis differences from investments (4,200,000)us-gaap_DeferredTaxLiabilitiesInvestments (5,700,000)us-gaap_DeferredTaxLiabilitiesInvestments    
Deferred tax liabilities 1,016,100,000us-gaap_DeferredTaxLiabilities 1,203,900,000us-gaap_DeferredTaxLiabilities    
Net deferred tax assets (liabilities) (543,900,000)us-gaap_DeferredTaxAssetsLiabilitiesNet (731,700,000)us-gaap_DeferredTaxAssetsLiabilitiesNet    
Net deferred tax assets and (liabilities), classified [Abstract]        
Other current assets - deferred taxes 110,800,000us-gaap_DeferredTaxAssetsNetCurrent 100,900,000us-gaap_DeferredTaxAssetsNetCurrent    
Long-term deferred tax liabilities (654,700,000)us-gaap_DeferredTaxLiabilitiesNoncurrent (832,600,000)us-gaap_DeferredTaxLiabilitiesNoncurrent    
Cumulative undistributed earnings of certain foreign subsidiaries indefinitely reinvested 1,800,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries      
Cumulative undistributed earnings of certain foreign subsidiaries not deemed to be indefinitely reinvested 1,800,000,000omc_CumulativeUndistributedEarningsOfCertainForeignSubsidiariesNotDeemedToBeIndefinitelyReinvested      
Reconciliation of Unrecognized Tax Benefits [Roll Forward]        
January 1 137,800,000us-gaap_UnrecognizedTaxBenefits 188,600,000us-gaap_UnrecognizedTaxBenefits    
Current year tax positions 6,000,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 5,100,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions    
Prior year tax positions 1,000,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 400,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions    
Reduction of prior year tax positions 500,000us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (31,400,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions    
Settlements (800,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (24,600,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities    
Lapse of statute of limitations (2,900,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (200,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations    
Foreign currency translation (1,800,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation (100,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation    
December 31 139,800,000us-gaap_UnrecognizedTaxBenefits 137,800,000us-gaap_UnrecognizedTaxBenefits 188,600,000us-gaap_UnrecognizedTaxBenefits  
Unrecognized tax benefits that would impact effective tax rate 58,600,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate 58,700,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate    
Convertible Debt [Member]        
Net deferred tax assets and (liabilities), classified [Abstract]        
Convertible debt, repayments of convertible debt       1,400,000,000us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
Convertible debt, repayments of convertible debt, deferred tax liability       329,000,000us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
Taxes paid, cancellation of indebtedness income for debt reacquired 66,000,000omc_TaxesPaidCancellationofIndebtednessIncomeforDebtReacquired
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember		      
Convertible Notes due July 31, 2032        
Net deferred tax assets and (liabilities), classified [Abstract]        
Taxes paid, conversion of convertible debt 66,200,000omc_TaxesPaidConversionofConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= omc_ConvertibleNotesDueJuly312032Member		      
Convertible debt, adjustment to additional paid-in capital 32,200,000omc_AdjustmenttoAdditionalPaidInCapitalConversionofConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= omc_ConvertibleNotesDueJuly312032Member		      
2033 Notes and 2038 Notes [Member]        
Net deferred tax assets and (liabilities), classified [Abstract]        
Taxes paid, conversion of convertible debt   52,700,000omc_TaxesPaidConversionofConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= omc_A2033Notesand2038NotesMember		    
Convertible debt, adjustment to additional paid-in capital   $ 34,500,000omc_AdjustmenttoAdditionalPaidInCapitalConversionofConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= omc_A2033Notesand2038NotesMember		    
Minimum [Member]        
Net deferred tax assets and (liabilities), classified [Abstract]        
Tax loss and credit carryforwards, expiration dates Dec. 31, 2019      
Maximum [Member]        
Net deferred tax assets and (liabilities), classified [Abstract]        
Tax loss and credit carryforwards, expiration dates Dec. 31, 2035