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Recognition of Pre-Tax Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Recognized pre-tax compensation expense $ 35,357us-gaap_AllocatedShareBasedCompensationExpense $ 25,391us-gaap_AllocatedShareBasedCompensationExpense $ 28,174us-gaap_AllocatedShareBasedCompensationExpense
Restricted Stock Awards and Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Recognized pre-tax compensation expense 35,357us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= mww_RestrictedStockAwardsAndRestrictedStockUnitsMember		 25,391us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= mww_RestrictedStockAwardsAndRestrictedStockUnitsMember		 28,123us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= mww_RestrictedStockAwardsAndRestrictedStockUnitsMember
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Recognized pre-tax compensation expense     $ 51us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember