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INVESTMENTS ( Loans) (DETAILS) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Commercial Real Estate Portfolio Segment [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan $ 49 $ 80
Age Analysis of Past Due Mortgage Loans [Abstract]    
30 to 59 Days Past Due 0 0
60 to 89 Days Past Due 0 0
Greater than 90 Days Past Due 0 0
Total Past Due 0 0
Current 49 80
Total financing receivables 49 80
Recorded Investment 90 Days Past Due and Still Accruing 0 0
Commercial Real Estate Portfolio Segment [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 14 15
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 14 15
Commercial Real Estate Portfolio Segment [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 17 17
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 17 17
Commercial Real Estate Portfolio Segment [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 6 47
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 6 47
Commercial Real Estate Portfolio Segment [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 12 1
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 12 1
Commercial Real Estate Portfolio Segment [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 33 23
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 33 23
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 4 5
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 4 5
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 17 17
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 17 17
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 12 1
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 12 1
Commercial Real Estate Portfolio Segment [Member] | 0%-50% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 6 41
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 6 41
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 6 41
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 6 41
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 50%-70% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 6
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 6
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 6
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 6
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 70%-90% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 10 10
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 10 10
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 10 10
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 10 10
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | 90% Plus [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables 0 0
Commercial Real Estate Portfolio Segment [Member] | With No Related Allowance Recorded [Member]
   
Impaired Mortgage Loans [Abstract]    
Recorded Investment 0 0
Unpaid principal balance 0 0
Related allowance 0 0
Average Record investments 0 0
Interest Income recognized 0 0
Commercial Real Estate Portfolio Segment [Member] | With Related Allowance Recorded [Member]
   
Impaired Mortgage Loans [Abstract]    
Recorded Investment 10 10
Unpaid principal balance 10 10
Related allowance (4) (3)
Average Record investments 10 10
Interest Income recognized 0 0
Agricultural Real Estate Portfolio Segment [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 0 47
Age Analysis of Past Due Mortgage Loans [Abstract]    
30 to 59 Days Past Due 0 0
60 to 89 Days Past Due 0 0
Greater than 90 Days Past Due 0 0
Total Past Due 0 0
Current 0 47
Total financing receivables 0 47
Recorded Investment 90 Days Past Due and Still Accruing 0 0
Agricultural Real Estate Portfolio Segment [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Agricultural Real Estate Portfolio Segment [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   7
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   7
Agricultural Real Estate Portfolio Segment [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   11
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   11
Agricultural Real Estate Portfolio Segment [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   4
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   4
Agricultural Real Estate Portfolio Segment [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   23
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   23
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   37
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   37
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   1
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   1
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   5
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   5
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   9
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   9
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   1
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   1
Agricultural Real Estate Portfolio Segment [Member] | 0%-50% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   21
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   21
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   10
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   10
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   1
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   1
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   3
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   3
Agricultural Real Estate Portfolio Segment [Member] | 50%-70% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 70%-90% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | 90% Plus [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Agricultural Real Estate Portfolio Segment [Member] | With No Related Allowance Recorded [Member]
   
Impaired Mortgage Loans [Abstract]    
Recorded Investment 0 0
Unpaid principal balance 0 0
Related allowance 0 0
Average Record investments 0 0
Interest Income recognized 0 0
Agricultural Real Estate Portfolio Segment [Member] | With Related Allowance Recorded [Member]
   
Impaired Mortgage Loans [Abstract]    
Recorded Investment 0 0
Unpaid principal balance 0 0
Related allowance 0 0
Average Record investments 0 0
Interest Income recognized 0 0
Total Mortgages Loan [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan 49 127
Age Analysis of Past Due Mortgage Loans [Abstract]    
30 to 59 Days Past Due 0 0
60 to 89 Days Past Due 0 0
Greater than 90 Days Past Due 0 0
Total Past Due 0 0
Current 49 127
Total financing receivables 49 127
Recorded Investment 90 Days Past Due and Still Accruing 0 0
Total Mortgages Loan [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   17
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   17
Total Mortgages Loan [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   24
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   24
Total Mortgages Loan [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   58
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   58
Total Mortgages Loan [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   5
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   5
Total Mortgages Loan [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   23
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   23
Total Mortgages Loan [Member] | 0%-50% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   60
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   60
Total Mortgages Loan [Member] | 0%-50% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   6
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   6
Total Mortgages Loan [Member] | 0%-50% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 0%-50% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   22
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   22
Total Mortgages Loan [Member] | 0%-50% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   9
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   9
Total Mortgages Loan [Member] | 0%-50% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Total Mortgages Loan [Member] | 0%-50% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   21
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   21
Total Mortgages Loan [Member] | 50%-70% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   51
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   51
Total Mortgages Loan [Member] | 50%-70% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   1
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   1
Total Mortgages Loan [Member] | 50%-70% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 50%-70% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Total Mortgages Loan [Member] | 50%-70% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   43
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   43
Total Mortgages Loan [Member] | 50%-70% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   3
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   3
Total Mortgages Loan [Member] | 50%-70% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   2
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   2
Total Mortgages Loan [Member] | 70%-90% [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   6
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   6
Total Mortgages Loan [Member] | 70%-90% [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 70%-90% [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 70%-90% [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 70%-90% [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   6
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   6
Total Mortgages Loan [Member] | 70%-90% [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 70%-90% [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 90% Plus [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   10
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   10
Total Mortgages Loan [Member] | 90% Plus [Member] | Greater than 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   10
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   10
Total Mortgages Loan [Member] | 90% Plus [Member] | 1.8x to 2.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 90% Plus [Member] | 1.5x to 1.8x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 90% Plus [Member] | 1.2x to 1.5x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 90% Plus [Member] | 1.0x to 1.2x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | 90% Plus [Member] | Less than 1.0x [Member]
   
Mortgage Loans by Loan-to-Value & Debt Service Coverage Ratios [Line Items]    
Principal amount of mortage loan   0
Age Analysis of Past Due Mortgage Loans [Abstract]    
Total financing receivables   0
Total Mortgages Loan [Member] | With No Related Allowance Recorded [Member]
   
Impaired Mortgage Loans [Abstract]    
Recorded Investment 0 0
Unpaid principal balance 0 0
Related allowance 0 0
Average Record investments 0 0
Interest Income recognized 0 0
Total Mortgages Loan [Member] | With Related Allowance Recorded [Member]
   
Impaired Mortgage Loans [Abstract]    
Recorded Investment 10 10
Unpaid principal balance 10 10
Related allowance (4) (3)
Average Record investments 10 10
Interest Income recognized $ 0 $ 0