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Related Party Transactions (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 10 Months Ended
Sep. 15, 2013
Dec. 31, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2012
Dec. 31, 2010
Jul. 02, 2013
Oct. 21, 2013
Related Party Transaction [Line Items]                
License Cost Reduction $ 0.3mso_LicenseCostReduction              
Annual fee 1.7us-gaap_LicenseCosts              
Tax gross-up included on balance sheet   0.3mso_TaxGrossupIncludedonBalanceSheet   0.3mso_TaxGrossupIncludedonBalanceSheet        
Charitable contributions to related parties   0.02mso_CharitableContributionsToRelatedParties            
Lifestyle Research Center                
Related Party Transaction [Line Items]                
Approved and documented household expenses       0.1mso_ApprovedAndDocumentedHouseholdExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_LifestyleResearchCenterMember
       
Reimbursements for approved and documented household expenses   0.03mso_ReimbursementsForApprovedAndDocumentedHouseholdExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_LifestyleResearchCenterMember
  0.02mso_ReimbursementsForApprovedAndDocumentedHouseholdExpenses
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_LifestyleResearchCenterMember
       
Reimbursements for business activities     0.02mso_ReimbursementsForBusinessActivities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_LifestyleResearchCenterMember
0.03mso_ReimbursementsForBusinessActivities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_LifestyleResearchCenterMember
0.03mso_ReimbursementsForBusinessActivities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_LifestyleResearchCenterMember
     
MS Partnership                
Related Party Transaction [Line Items]                
Reimbursements for insurance policy premiums           0.3mso_ReimbursementsForInsurancePolicyPremiums
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_MsPartnershipMember
   
Tax on reimbursements for insurance policy premiums       0.3mso_TaxonReimbursementsforInsurancePolicyPremiums
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_MsPartnershipMember
       
Martha Stewart                
Related Party Transaction [Line Items]                
Talent Compensation Reduction             0.2mso_TalentCompensationReduction
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ExecutiveOfficerMember
 
Talent compensation             1.8mso_TalentCompensation
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ExecutiveOfficerMember
 
Target Bonus       1.0mso_TargetBonus
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ExecutiveOfficerMember
       
Maximum Annual Bonus Percentage       150.00%mso_MaximumAnnualBonusPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ExecutiveOfficerMember
       
Alexis Stewart                
Related Party Transaction [Line Items]                
Expenses from related parties         0us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember
     
Martha Stewart Family Members                
Related Party Transaction [Line Items]                
Expenses from related parties       0.50us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_MarthaStewartAndCharlesKopplemanFamilyMembersMember
0.40us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_MarthaStewartAndCharlesKopplemanFamilyMembersMember
     
JCP                
Related Party Transaction [Line Items]                
Investment in company's outstanding common stock               16.40%mso_InvestmentInCompanysOutstandingCommonStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_JcpMember
Revenue from related parties   11.6us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_JcpMember
          8.1us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_JcpMember
Bonus [Member] | Martha Stewart                
Related Party Transaction [Line Items]                
Related Party Transaction, Amounts of Transaction       0.6us-gaap_RelatedPartyTransactionAmountsOfTransaction
/ us-gaap_RelatedPartyTransactionAxis
= mso_BonusMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ExecutiveOfficerMember
       
Expenses from related parties       $ 0.03us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= mso_BonusMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ExecutiveOfficerMember
       
Stockholders' Equity, Total [Member] | Martha Stewart Family Members                
Related Party Transaction [Line Items]                
Concentration Risk, Percentage       10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_StockholdersEquityTotalMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mso_MarthaStewartAndCharlesKopplemanFamilyMembersMember