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Employee Compensation and Benefit Plans - Schedule of Stock Option Activity (Footnote) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Apr. 22, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total intrinsic value of stock options exercised $ 13.7us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue $ 35.3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue $ 23.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue  
Shares delivered by employees as payment for the exercise price and income tax withholdings on compensation (in shares) 249,696ocn_SharesDeliveredAsPaymentForExerciseOfOptions 138,553ocn_SharesDeliveredAsPaymentForExerciseOfOptions 33,605ocn_SharesDeliveredAsPaymentForExerciseOfOptions  
Shares issued related to exercise of stock options (in shares) 434,054ocn_OptionExercisesNetOfTaxWithholding 652,015ocn_OptionExercisesNetOfTaxWithholding 1,082,944ocn_OptionExercisesNetOfTaxWithholding  
Market-based options that have not met performance criteria (in shares) 295,000ocn_NumberOfMarketBasedOptionsNotMeetingPerformanceCriteria      
Net aggregate intrinsic value of stock options outstanding 41.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue      
Net aggregate intrinsic value of stock options exercisable 47.5us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1      
Market-based options outstanding (in shares) 4,677,814ocn_NumberOfMarketBasedOptionsOutstanding      
Market-based options outstanding, exercisable (in shares) 3,986,878ocn_NumberOfMarketBasedOptionsExercisable      
Weighted average remaining contractual term of options outstanding 4 years 5 months 20 days      
Weighted average remaining contractual term of options exercisable 3 years 9 months 18 days      
Total fair value of stock options vested and became exercisable 2.6us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 4.7us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 2.2us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1  
Former Executive Chairman Of Board Of Directors [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted (in shares)     2,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_TitleOfIndividualAxis
= ocn_FormerExecutiveChairmanOfBoardOfDirectorsMember		  
Stock options granted, exercise price (in dollars per share)     $ 24.38us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= ocn_FormerExecutiveChairmanOfBoardOfDirectorsMember		  
Options surrendered (in shares)       1,000,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_TitleOfIndividualAxis
= ocn_FormerExecutiveChairmanOfBoardOfDirectorsMember
Recognized compensation expense, previously unrecognized       $ 5.7us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
/ us-gaap_TitleOfIndividualAxis
= ocn_FormerExecutiveChairmanOfBoardOfDirectorsMember