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SIGNIFICANT ACCOUNTING POLICIES - Investments and Mortgage Loans (DETAILS) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Minimum [Member]    
Real Estate and Accumulated Depreciation [Line Items]    
Real Estate and Accumulated Depreciation, Life Used for Depreciation 40 years 0 months 0 days  
Maximum [Member]    
Real Estate and Accumulated Depreciation [Line Items]    
Real Estate and Accumulated Depreciation, Life Used for Depreciation 50 years 0 months 0 days  
Commercial Real Estate Portfolio Segment [Member]    
Mortgage Loans on Real Estate, Write-down or Reserve, Management Judgment Factor [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 $ 6us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember