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Income Taxes Level 3 (Tables) | 9 Months Ended
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Sep. 30, 2017
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
Income Tax Rate Reconciliation
| Three Months Ended September 30, | Nine Months Ended September 30,
| 2017 | 2016 | 2017 | 2016
Tax provision at U.S. federal statutory rate | $ | 89 |  | $ | 185 |  | $ | 211 |  | $ | 378 |
Tax-exempt interest | (31 | ) | (31 | ) | (91 | ) | (94 | )
Dividends-received deduction ("DRD") | (37 | ) | (14 | ) | (75 | ) | (57 | )
Decrease in deferred tax valuation allowance | — |  | — |  | — |  | (78 | )
Stock-based compensation | (4 | ) | — |  | (12 | ) | — |
Sale of U.K. business | — |  | (50 | ) | 5 |  | (50 | )
Other | 5 |  | — |  | (6 | ) | 3 |
Provision for income taxes | $ | 22 |  | $ | 90 |  | $ | 32 |  | $ | 102 |
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] |
Roll-forward of Unrecognized Tax Benefits
| Three Months Ended September 30, | Nine Months Ended September 30,
| 2017 | 2016 | 2017 | 2016
Balance, beginning of period | $ | 12 |  | $ | 12 |  | $ | 12 |  | $ | 12 |
Gross increases - tax positions in prior period | 3 |  | — |  | 3 |  | — |
Gross decreases - tax positions in prior period | — |  | — |  | — |  | — |
Balance, end of period | $ | 15 |  | $ | 12 |  | $ | 15 |  | $ | 12 |
Summary of Operating Loss Carryforwards [Table Text Block] |
Future Tax Benefits
| As of |
| September 30, 2017 | December 31, 2016 | Expiration
| Carryover amount | Expected tax benefit, gross | Carryover amount | Expected tax benefit, gross | Dates | Amount
Net operating loss carryover - U.S. | $ | 4,938 |  | $ | 1,728 |  | $ | 5,412 |  | $ | 1,894 |  | 2020 | $ | 1 |
|  |  |  |  | 2023 | - | 2036 | $ | 4,937 |
Net operating loss carryover - foreign | $ | 3 |  | $ | — |  | $ | 48 |  | $ | 9 |  | No expiration | $ | 3 |
Foreign tax credit carryover | $ | 33 |  | $ | 33 |  | $ | 56 |  | $ | 56 |  | 2021 | - | 2024 | $ | 33 |
Alternative minimum tax credit carryover | $ | 742 |  | $ | 742 |  | $ | 640 |  | $ | 640 |  | No expiration | $ | 742 |
General business credit carryover | $ | 3 |  | $ | 3 |  | $ | 99 |  | $ | 99 |  | 2031 | - | 2036 | $ | 3 |
Capital loss carryover | $ | 44 |  | $ | 15 |  | $ | — |  | $ | — |  | 2022 | $ | 44 |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of pertinent information, such as tax authority, amounts, and expiration dates, of net operating loss carryforwards, including an assessment of the likelihood of utilization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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- Definition Tabular disclosure of unrecognized tax benefits for which a material change is reasonably possible in the next twelve months, typically including the nature of the uncertainty, the event(s) that could cause a material change, and an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made. An unrecognized tax benefit is the difference between a tax position taken in a tax return and the amounts recognized in the financial statements for which it is more likely than not, based on the technical merits of the position, that the tax position will not be sustained upon examination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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