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Investment Holding Level 4 Available-for-Sale Securities (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
securities
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
securities
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Schedule of Available-for-sale Securities [Line Items]                      
Assets $ 170,346       $ 175,350       $ 170,346 $ 175,350  
Liabilities 162,525       167,188       162,525 167,188  
Net Investment Income                 1,373 1,456 $ 1,543
Equity Method Investments 930               930    
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]                      
Available-for-sale Securities, Gross Realized Gains                 211 239 264
Available-for-sale Securities, Gross Realized Losses                 93 211 235
Gain (Loss) on Investments, Excluding Other than Temporary Impairments                 (135) (85) 606
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]                      
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value 5,839       5,721       5,839 5,721  
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis 5,781       5,622       5,781 5,622  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 9,303       9,173       9,303 9,173  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 8,258       8,361       8,258 8,361  
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value 3,649       3,714       3,649 3,714  
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 3,562       3,650       3,562 3,650  
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value 4,301       5,075       4,301 5,075  
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis 4,184       4,973       4,184 4,973  
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value 727       974       727 974  
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis 722       953       722 953  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 5,489       8,179       5,489 8,179  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 5,345       7,937       5,345 7,937  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 144       242       144 242  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 1,225       1,545       1,225 1,545  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,163       1,443       1,163 1,443  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 62       100       62 100  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 6,714       9,724       6,714 9,724  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 6,508       9,380       6,508 9,380  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss $ 206       342       $ 206 342  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities 1,897               1,897    
Percentage of Gross Unrealized Losses Depressed Less than Twenty Percent of Cost or Amortized Cost 95.00%               95.00%    
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax $ 206               $ 206    
Available-for-sale Securities, Amortized Cost Basis 22,649               22,649    
Equity securities, AFS 152       459       152 459  
Available-for-sale Securities, Debt Securities 23,819       24,657       23,819 24,657  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 204       331       204 331  
Available-for-sale Debt Securities, Amortized Cost Basis 22,507       23,559       22,507 23,559  
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 2               2    
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax 12               12    
Available-for-sale Equity Securities, Amortized Cost Basis 142       471       142 471  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 1,516       1,431       1,516 1,431  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 1       6       1 6  
Summary of Investments, Other than Investments in Related Parties, Cost 29,764               29,764    
Mortgage Loans on Real Estate, Carrying Amount of Mortgages 2,811       2,918       2,811 2,918  
Net Income (Loss) Attributable to Parent 57 $ 79 $ 118 $ 28 8 $ 117 $ 230 $ 145 282 500 676
Equity Securities [Member]                      
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]                      
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds                 321 586 107
Available-for-sale Securities, Gross Realized Gains                 4 26 9
Available-for-sale Securities, Gross Realized Losses                 8 26 6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 59       83       59 83  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 57       79       57 79  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 2       4       2 4  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 5       44       5 44  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 5       37       5 37  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0       7       0 7  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 64       127       64 127  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 62       116       62 116  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 2       11       2 11  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Equity securities, AFS         178         178  
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax         11         11  
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax         11         11  
Available-for-sale Equity Securities, Amortized Cost Basis         178         178  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
Debt Securities [Member]                      
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]                      
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds                 7,409 9,454 9,084
Available-for-sale Securities, Gross Realized Gains                 206 195 210
Available-for-sale Securities, Gross Realized Losses                 85 161 183
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 5,430       8,096       5,430 8,096  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 5,288       7,858       5,288 7,858  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 142       238       142 238  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 1,220       1,501       1,220 1,501  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 1,158       1,406       1,158 1,406  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 62       93       62 93  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 6,650       9,597       6,650 9,597  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 6,446       9,264       6,446 9,264  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 204       331       204 331  
Municipal Bonds [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 166       179       166 179  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 160       174       160 174  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 6       5       6 5  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 0       0       0 0  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0       0       0 0  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0       0       0 0  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 166       179       166 179  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 160       174       160 174  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 6       5       6 5  
Fixed maturities available-for-sale, excluding mortgage-backed and asset-backed securities [Member]                      
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 17,980       18,936       17,980 18,936  
Available-for-sale Debt Securities, Amortized Cost Basis 16,726       17,937       16,726 17,937  
Available-for-sale Securities [Member]                      
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities 23,971       24,835       23,971 24,835  
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax         342         342  
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 1,528       1,442       1,528 1,442  
Available-for-sale Securities, Amortized Cost Basis         23,737         23,737  
Equity securities, AFS 152               152    
Available-for-sale Equity Securities, Amortized Cost Basis 142               142    
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 1       6       1 6  
US Treasury Securities [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 385       963       385 963  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 371       950       371 950  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 14       13       14 13  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 0       8       0 8  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0       8       0 8  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0       0       0 0  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 385       971       385 971  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 371       958       371 958  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 14       13       14 13  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 1,753       2,298       1,753 2,298  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 14       13       14 13  
Available-for-sale Debt Securities, Amortized Cost Basis 1,614       2,127       1,614 2,127  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 153       184       153 184  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
Residential Mortgage Backed Securities [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 548       280       548 280  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 535       279       535 279  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 13       1       13 1  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 198       230       198 230  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 195       223       195 223  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 3       7       3 7  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 746       510       746 510  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 730       502       730 502  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 16       8       16 8  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 1,760       1,503       1,760 1,503  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 16       8       16 8  
Available-for-sale Debt Securities, Amortized Cost Basis 1,742       1,468       1,742 1,468  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 34       43       34 43  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
US States and Political Subdivisions Debt Securities [Member]                      
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 1,189       1,132       1,189 1,132  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 6       5       6 5  
Available-for-sale Debt Securities, Amortized Cost Basis         1,057         1,057  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 97       80       97 80  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
Foreign Government Debt Securities [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 164       144       164 144  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 155       136       155 136  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 9       8       9 8  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 6       30       6 30  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 5       27       5 27  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 1       3       1 3  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 170       174       170 174  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 160       163       160 163  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 10       11       10 11  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 345       331       345 331  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 10       11       10 11  
Available-for-sale Debt Securities, Amortized Cost Basis         328         328  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 18       14       18 14  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
Corporate Debt Securities [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 2,535       4,880       2,535 4,880  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 2,464       4,696       2,464 4,696  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 71       184       71 184  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 402       363       402 363  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 378       322       378 322  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 24       41       24 41  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 2,937       5,243       2,937 5,243  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,842       5,018       2,842 5,018  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 95       225       95 225  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 14,693       15,175       14,693 15,175  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 95       225       95 225  
Available-for-sale Debt Securities, Amortized Cost Basis 13,677       14,425       13,677 14,425  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 1,111       975       1,111 975  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       3       0 3  
Commercial Mortgage Backed Securities [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 1,058       655       1,058 655  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 1,030       636       1,030 636  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 28       19       28 19  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 139       99       139 99  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 133       94       133 94  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 6       5       6 5  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 1,197       754       1,197 754  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 1,163       730       1,163 730  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 34       24       34 24  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 2,146       1,964       2,146 1,964  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 34       24       34 24  
Available-for-sale Debt Securities, Amortized Cost Basis 2,135       1,936       2,135 1,936  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 45       52       45 52  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 1       3       1 3  
Collateralized Debt Obligations [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 325       608       325 608  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 325       602       325 602  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0       6       0 6  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 210       500       210 500  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 208       493       208 493  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 2       5       2 5  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 535       1,108       535 1,108  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 533       1,095       533 1,095  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 2       11       2 11  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 940       1,408       940 1,408  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 2       11       2 11  
Available-for-sale Debt Securities, Amortized Cost Basis 893       1,354       893 1,354  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 49       67       49 67  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
Asset-backed Securities [Member]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]                      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Amortized Cost 249       387       249 387  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 248       385       248 385  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 1       2       1 2  
Available-for-sale Securities Continuous Unrealized Loss Position Twelve Months or Longer Amortized Cost 265       271       265 271  
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 239       239       239 239  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 26       32       26 32  
Available-for-sale Securities Continuous Unrealized Loss Position Amortized Cost 514       658       514 658  
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 487       624       487 624  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss 27       34       27 34  
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Available-for-sale Securities, Debt Securities 993       846       993 846  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 27       34       27 34  
Available-for-sale Debt Securities, Amortized Cost Basis 1,011       864       1,011 864  
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 9       16       9 16  
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Available-for-sale, Debt Securities 0       0       0 0  
Accumulated Net Unrealized Investment Gain (Loss) [Member]                      
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]                      
Gain (Loss) on Investments, Excluding Other than Temporary Impairments                 89 (27) 1
Equity Securities [Member]                      
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Equity securities, AFS 0       281       0 281  
Available-for-sale Equity Securities, Amortized Cost Basis         293         293  
Limited Partner [Member]                      
Schedule of Available-for-sale Securities [Line Items]                      
Assets 100,600       82,200       100,600 82,200  
Liabilities $ 17,600       $ 14,000       17,600 14,000  
Net Investment Income                 900 800 3,500
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax [Abstract]                      
Net Income (Loss) Attributable to Parent                 $ 7,400 $ 5,200 $ 8,700