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VALUE OF BUSINESS ACQUIRED (DETAILS) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 01, 2013
Value Of Business Acquired [Line Items]        
Gross Carrying Amount $ 416mloa_GrossValueOfBusinessAcquiredVoba $ 416mloa_GrossValueOfBusinessAcquiredVoba    
Accumulated Amortization and Other (409)mloa_AccumulatedAmortizationOfValueOfBusinessAcquiredVoba (398)mloa_AccumulatedAmortizationOfValueOfBusinessAcquiredVoba    
Net 7us-gaap_ValueOfBusinessAcquiredVOBA 18us-gaap_ValueOfBusinessAcquiredVOBA    
Total amortization 10us-gaap_AmortizationOfValueOfBusinessAcquiredVOBA 11us-gaap_AmortizationOfValueOfBusinessAcquiredVOBA (13)us-gaap_AmortizationOfValueOfBusinessAcquiredVOBA  
Amortization Of Value Of Business Acquired VOBA Low End Range 0mloa_AmortizationOfValueOfBusinessAcquiredVobaLowEndRange      
Amortization Of Value Of Business Acquired VOBA High End Range 1mloa_AmortizationOfValueOfBusinessAcquiredVobaHighEndRange      
Protective Life [Member]        
Value Of Business Acquired [Line Items]        
Net       $ 117us-gaap_ValueOfBusinessAcquiredVOBA
/ mloa_DeferredCostOfReinsuranceAxis
= mloa_ProtectiveLifeMember