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RELATED PARTY TRANSACTIONS (DETAILS) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Related Party Transaction [Line Items]      
Payment Of Return Of Capital $ 0mloa_PaymentOfReturnOfCapital $ 200mloa_PaymentOfReturnOfCapital $ 0mloa_PaymentOfReturnOfCapital
Proceeds from Sale of Agricultural Mortgage Loans to AXA Equitable     42us-gaap_ProceedsFromRealEstateAndRealEstateJointVentures
Net gain (loss) realized on sale of agricultural mortgage loans to AXA Equitable     3us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
Expenses from Related Party Transactions 1us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty 2us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty 2us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Assumed Premiums Earned 1us-gaap_AssumedPremiumsEarned 1us-gaap_AssumedPremiumsEarned 2us-gaap_AssumedPremiumsEarned
AXA Equitable Financial Services [Member]      
Related Party Transaction [Line Items]      
Payment Of Return Of Capital   200mloa_PaymentOfReturnOfCapital
/ dei_LegalEntityAxis
= mloa_AxaEquitableFinancialServicesMember
 
AXA Foundation [Member]      
Related Party Transaction [Line Items]      
Donations To Affiliates   20mloa_DonationsToAffiliates
/ dei_LegalEntityAxis
= mloa_AxaFoundationMember
 
AXA Equitable [Member]      
Related Party Transaction [Line Items]      
Expenses from Related Party Transactions 67us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ dei_LegalEntityAxis
= mloa_AxaEquitableMember
87us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ dei_LegalEntityAxis
= mloa_AxaEquitableMember
75us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ dei_LegalEntityAxis
= mloa_AxaEquitableMember
Accounts payable, Related Party Transactions 16us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= mloa_AxaEquitableMember
26us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= mloa_AxaEquitableMember
 
AXA Distribution [Member]      
Related Party Transaction [Line Items]      
Expenses from Related Party Transactions 52us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ dei_LegalEntityAxis
= mloa_AxaDistributionMember
47us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ dei_LegalEntityAxis
= mloa_AxaDistributionMember
32us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ dei_LegalEntityAxis
= mloa_AxaDistributionMember
Revenue from Related Party Transactions $ 36us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= mloa_AxaDistributionMember
$ 29us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= mloa_AxaDistributionMember
$ 25us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= mloa_AxaDistributionMember