Adoption of Accounting Pronouncements	12 Months Ended
Adoption of Accounting Pronouncements	Dec. 31, 2019
Adoption of Accounting Pronouncements [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Adoption of Accounting Pronouncements The Financial Accounting Standards Board ("FASB") issued new leasing guidance through ASU 2016-02, Leases, which was issued in February 2016, as well as additional implementation guidance that was issued in 2018 and 2019 (collectively referred to as "ASU 2016-02"). ASU 2016-02 requires all lessees to recognize assets and liabilities on their balance sheets for the rights and obligations created by leases with terms longer than 12 months. For leases with a term of 12 months or less, an accounting policy election is allowed to recognize lease expense on a straight-line basis over the lease term. ASU 2016-02 allows for certain practical expedients, accounting policy elections, and a transition method election. We adopted practical expedients related to reassessing: (i) whether our existing contracts are, or contain, leases; (ii) lease classification for existing leases; and (iii) initial direct costs for existing leases. Additionally, we adopted accounting policy elections to: (i) aggregate lease and non-lease components of a contract into a single lease component; and (ii) expense short-term leases on a straight-line basis over the lease term. We adopted ASU 2016-02 effective January 1, 2019. See Note 17. "Leases" in this Form 10-K for additional information regarding our leases and the impact of this guidance on our financial condition and results of operations. In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting ("ASU 2018-07"). The amendments in ASU 2018-07 expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. We adopted ASU 2018-07 in the first quarter of 2019 and it did not have a material impact on our financial condition or results of operations. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement: Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”). ASU 2018-13 modifies the disclosure requirements for fair value measurements. The modifications removed the following disclosure requirements: (i) the amount of, and reasons for, transfers between Level 1 and Level 2 of the fair value hierarchy; (ii) the policy for timing of transfers between levels; and (iii) the valuation processes for Level 3 fair value measurements. This ASU added the following disclosure requirements: (i) the changes in unrealized gains and losses for the period included in other comprehensive income ("OCI") for recurring Level 3 fair value measurements held at the end of the reporting period; and (ii) the range and weighted average of significant observable inputs used to develop Level 3 fair value measurements. We elected to early adopt the provisions related to removed disclosures in the fourth quarter of 2019 and will adopt the remaining disclosure requirements in the first quarter of 2020 as permitted under ASU 2018-13. As the requirements of this literature are disclosure only, ASU 2018-13 has no impact our financial condition or results of operations. In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General: Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans (“ASU 2018-14”). ASU 2018-14 modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. These modifications include: (i) removing the requirement to disclose the amount in accumulated other comprehensive income ("AOCI") expected to be recognized as components of net periodic benefit cost over the next fiscal year; and (ii) adding the requirement to disclose an explanation of the reasons for significant gains or losses related to changes in the benefit obligation for the period. We elected to early adopt this update in the fourth quarter of 2019. As the requirements of this literature are disclosure only, ASU 2018-14 does not have impact our financial condition or results of operations. Pronouncements to be effective in the future In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses, as well as additional implementation guidance issued in 2018 and 2019 (collectively referred to as “ASU 2016-13”) that changes the way entities recognize impairment of financial assets. The new guidance requires immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets through the establishment of a valuation allowance. The valuation allowance is a measurement of expected losses based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Additionally, ASU 2016-03 requires the presentation of the impacted financial assets on the consolidated balance sheet net of the valuation allowance. We will adopt this guidance on January 1, 2020 and it will not be material to our financial condition or results of operations. We will apply a modified retrospective approach for the adoption and we anticipate recording a cumulative-effect adjustment to the opening balance of 2020 retained earnings, which is not expected to be material. Also, as prescribed in the literature, we will not adjust the amortized cost basis of any securities for which we had previously recorded an OTTI charge. The cumulative-effect adjustment to increase retained earnings represents the net adjustment required to establish valuation allowances on our held-to-maturity ("HTM") debt securities and to re-estimate valuation allowances on our trade receivables and reinsurance recoverables under ASU 2016-13. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software: Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU 2018-15”). ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. We will adopt this guidance on January 1, 2020 and we do not expect that it will have a material impact to our financial condition or results of operations. In December 2019, the FASB issued ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes (“ASU 2019-12”). Among other items, the amendments in ASU 2019-12 simplify the accounting treatment of tax law changes and year-to-date losses in interim periods. An entity generally recognizes the effects of a change in tax law in the period of enactment; however, there is an exception for tax laws with delayed effective dates. Under current guidance, an entity may not adjust its annual effective tax rate for a tax law change until the period in which the law is effective. This exception was removed under ASU 2019-12, thereby providing that all effects of a tax law change are recognized in the period of enactment, including adjustment of the estimated annual effective tax rate. Regarding year-to-date losses in interim periods, an entity is required to estimate its annual effective tax rate for the full fiscal year at the end of each interim period and use that rate to calculate its income taxes on a year-to-date basis. However, current guidance provides an exception that when a loss in an interim period exceeds the anticipate loss for the year, the income tax benefit is limited to the amount that would be recognized if the year-to-date loss were the anticipated loss for the full year. ASU 2019-12 removes this exception and provides that in this situation, an entity would compute its income tax benefit at each interim period based on its estimated annual effective tax rate. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, including interim periods within those annual periods. Early adoption is permitted. We are currently evaluating the impact of this guidance on our financial condition and results of operations.