Basis Of Presentation and Significant Accounting Policies	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation: The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for annual financial statements. We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2017 Annual Report on Form 10-K, unless the information contained in those disclosures materially changed or is required by GAAP. Certain prior year amounts have been reclassified to conform to the current year presentation or adjusted to conform to the current year rounding convention. In the opinion of management, all adjustments, including normal recurring adjustments, necessary for a fair statement of the consolidated financial statements as of and for the three and nine months ended September 30, 2018 and 2017 have been recorded. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2018, or any other period. These unaudited consolidated financial statements should be read in conjunction with our audited consolidated financial statements as of and for the year ended December 31, 2017 included in our 2017 Annual Report on Form 10-K. Cash and Cash Equivalents: Certain of our subsidiaries operate outside of the United States and have functional currencies other than the U.S. dollar, or USD. We translate the assets and liabilities of those subsidiaries to USD using the exchange rate in effect at the end of the period. We translate the revenues and expenses of those subsidiaries to USD using the average exchange rates in effect during the period. The net effect of these translation adjustments is included in “Foreign currency translation adjustments” in our consolidated statements of comprehensive income. Additionally, we control a number of bank accounts that are used exclusively to hold customer funds for the administration of customer benefits and have cash and cash equivalents on deposit to meet certain regulatory requirements. These amounts totaled $243 and $182 at September 30, 2018 and December 31, 2017, respectively and are included in the cash and cash equivalents line on our consolidated balance sheets. Revenue Recognition: Premiums for fully-insured contracts are recognized as revenue over the period insurance coverage is provided, and, if applicable, net of amounts recognized for the minimum medical loss ratio rebates or contractual or government-mandated premium stabilization programs. Administrative fees and other revenue includes revenue from certain group contracts that provide for the group to be at risk for all, or with supplemental insurance arrangements, a portion of their claims experience. We charge these self-funded groups an administrative fee, which is based on the number of members in a group or the group’s claim experience. Under our self-funded arrangements, revenue is recognized as administrative services are performed, and benefit payments under these programs are excluded from benefit expense. For additional information about our revenues, see Note 2, “Basis of Presentation and Significant Accounting Policies” and Note 19, “Segment Information,” to our audited consolidated financial statements as of and for the year ended December 31, 2017 included in our 2017 Annual Report on Form 10-K. In addition, see Note 15, “Segment Information,” herein for the disaggregation of revenues by segments and products. Premium and self-funded receivables include the uncollected amounts from insured groups, individuals and government programs. Premium receivables are reported net of an allowance for doubtful accounts of $312 and $302 at September 30, 2018 and December 31, 2017, respectively. Self-funded receivables are reported net of an allowance for doubtful accounts of $40 and $153 at September 30, 2018 and December 31, 2017, respectively. For our non-fully-insured contracts, we had no material contract assets, contract liabilities or deferred contract costs recorded on our consolidated balance sheet at September 30, 2018. For the three and nine months ended September 30, 2018, revenue recognized from performance obligations related to prior periods, such as due to changes in transaction price, was not material. For contracts that have an original expected duration of greater than one year, revenue expected to be recognized in future periods related to unfulfilled contractual performance obligations and contracts with variable consideration related to undelivered performance obligations is not material. Recently Adopted Accounting Guidance: In February 2018, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, or ASU 2018-02. On December 22, 2017, the federal government enacted a tax bill, H.R.1, An act to provide for reconciliation pursuant to titles II and V of the concurrent resolution on the budget for fiscal year 2018, or the Tax Cuts and Jobs Act. The Tax Cuts and Jobs Act contains significant changes to corporate taxation, including, but not limited to, reducing the U.S. federal corporate income tax rate from 35% to 21% and modifying or limiting many business deductions. Current FASB guidance requires adjustments of deferred taxes due to a change in the federal corporate income tax rate to be included in income from operations. As a result, the tax effects of items within accumulated other comprehensive loss did not reflect the appropriate tax rate. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the change in the federal corporate income tax rate. We adopted the amendments in ASU 2018-02 for our interim and annual reporting periods beginning on January 1, 2018 and reclassified $91 of stranded tax effects from accumulated other comprehensive loss to retained earnings on our consolidated balance sheet. The adoption of ASU 2018-02 did not have any impact on our results of operations or cash flows. In May 2017, the FASB issued Accounting Standards Update No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting, or ASU 2017-09. This update provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. We adopted ASU 2017-09 on January 1, 2018. The guidance has been and will be applied prospectively to awards modified on or after the adoption date. The adoption of ASU 2017-09 did not have any impact on our consolidated financial position, results of operations or cash flows. In March 2017, the FASB issued Accounting Standards Update No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, or ASU 2017-07. This amendment requires entities to disaggregate the service cost component from the other components of the benefit cost and present the service cost component in the same income statement line item as other employee compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. Certain of our defined benefit plans have previously been frozen, resulting in no annual service costs, and the remaining service costs for our non-frozen plan are not material. We adopted ASU 2017-07 on January 1, 2018 and it did not have a material impact on our results of operations, cash flows or consolidated financial position. In December 2016, the FASB issued Accounting Standards Update No. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, or ASU 2016-20. In May 2016, the FASB issued Accounting Standards Update No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, or ASU 2016-12. In April 2016, the FASB issued Accounting Standards Update No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, or ASU 2016-10. In March 2016, the FASB issued Accounting Standards Update No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross verses Net), or ASU 2016-08. These updates provide additional clarification and implementation guidance on the previously issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), or ASU 2014-09. Collectively, these updates require a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. These updates supersede almost all existing revenue recognition guidance under GAAP, with certain exceptions, including an exception for our premium revenues, which are recorded on the Premiums line item on our consolidated statements of income and will continue to be accounted for in accordance with the provisions of Accounting Standards Codification, or ASC, Topic 944, Financial Services - Insurance. Our administrative service and other contracts that are subject to these Accounting Standards Updates are recorded in the Administrative fees and other revenue line item on our consolidated statements of income and represents approximately 6% of our consolidated total operating revenue. We adopted these standards on January 1, 2018 using the modified retrospective approach. The adoption of these standards did not have a material impact on our beginning retained earnings, results of operations, cash flows or consolidated financial position. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, or ASU 2016-18. This update amends ASC Topic 230 to add and clarify guidance on the classification and presentation of restricted cash in the statement of cash flows. The guidance requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. We adopted ASU 2016-18 on January 1, 2018 using a retrospective approach. The adoption of ASU 2016-18 did not have a material impact on our consolidated statements of cash flows and did not impact our results of operations or consolidated financial position. In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, or ASU 2016-15. This update addresses the presentation and classification on the statement of cash flows for eight specific items, with the objective of reducing existing diversity in practice in how certain cash receipts and cash payments are presented and classified. We adopted ASU 2016-15 on January 1, 2018. The adoption of ASU 2016-15 did not have a material impact on our consolidated statements of cash flows, results of operations or consolidated financial position. In January 2016, the FASB issued Accounting Standards Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, or ASU 2016-01. The amendments in ASU 2016-01 change the accounting for non-consolidated equity investments that are not accounted for under the equity method of accounting by requiring changes in fair value to be recognized in income. Additionally, ASU 2016-01 simplifies the impairment assessment of equity investments without readily determinable fair values; requires entities to use the exit price when estimating the fair value of financial instruments; and modifies various presentation disclosure requirements for financial instruments. We adopted ASU 2016-01 on January 1, 2018 as a cumulative-effect adjustment and reclassified $320 of unrealized gains on equity investments, net of tax, from accumulated other comprehensive loss to retained earnings on our consolidated balance sheet. Effective January 1, 2018, our results of operations include the changes in fair value of these financial instruments. Recent Accounting Guidance Not Yet Adopted: In August 2018, the FASB issued Accounting Standards Update No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract, or ASU 2018-15. The amendments in ASU 2018-15 require implementation costs incurred by customers in cloud computing arrangements to be deferred and recognized over the term of the arrangement, if those costs would be capitalized by the customer in a software licensing arrangement under the internal-use software guidance. The amendments also require an entity to disclose the nature of its hosting arrangements and adhere to certain presentation requirements in its balance sheet, income statement and statement of cash flows. ASU 2018-15 is effective for our interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The guidance can be applied either prospectively to all implementation costs incurred after the date of adoption or retrospectively. We are currently evaluating the effects the adoption of ASU 2018-15 will have on our consolidated financial position, results of operations and cash flows. In August 2018, the FASB issued Accounting Standards Update No. 2018-14, Compensation—Retirement Benefits - Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans, or ASU 2018-14. The amendments in ASU 2018-14 eliminate, add, and modify certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments are effective for our annual reporting periods beginning after December 15, 2020, with early adoption permitted. The guidance is to be applied on a retrospective basis to all periods presented. We are currently evaluating the effects the adoption of ASU 2018-14 will have on our disclosures. In August 2018, the FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, or ASU 2018-13. The amendments in ASU 2018-13 eliminate, add, and modify certain disclosure requirements for fair value measurements. The amendments are effective for our interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted for either the entire ASU or only the provisions that eliminate or modify requirements. The amendments with respect to changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty are to be applied prospectively. All other amendments are to be applied retrospectively to all periods presented. We are currently evaluating the effects the adoption of ASU 2018-13 will have on our disclosures. In August 2018, the FASB issued Accounting Standards Update No. 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts, or ASU 2018-12. The amendments in ASU 2018-12 make changes to a variety of areas to simplify or improve the existing recognition, measurement, presentation and disclosure requirements for long-duration contracts issued by an insurance entity. The amendments require insurers to annually review the assumptions they make about their policyholders and update the liabilities for future policy benefits if the assumptions change. The amendments also simplify the amortization of deferred contract acquisition costs and add new disclosure requirements about the assumptions insurers use to measure their liabilities and how they may affect future cash flows. The amendments in ASU 2018-12 will be effective for our interim and annual reporting periods beginning after December 15, 2020. The amendments related to the liability for future policy benefits for traditional and limited-payment contracts and deferred acquisition costs are to be applied to contracts in force as of the beginning of the earliest period presented, with an option to apply such amendments retrospectively with a cumulative-effect adjustment to the opening balance of retained earnings as of the earliest period presented. The amendments for market risk benefits are to be applied retrospectively. We are currently evaluating the effects the adoption of ASU 2018-12 will have on our consolidated financial position, results of operations, cash flows, and related disclosures. In July 2018, the FASB issued Accounting Standards Update No. 2018-11, Leases (Topic 842): Targeted Improvements, or ASU 2018-11, and Accounting Standards Update No. 2018-10, Codification Improvements to Topic 842, Leases, or ASU 2018-10. The amendments in ASU 2018-11 provide for an additional and optional transition method that allows an entity to initially apply ASC Topic 842 at the adoption date and recognize a cumulative effect adjustment to its opening balance of retained earnings in the period of adoption and continue its reporting for the comparative periods presented in accordance with the current lease guidance, ASC Topic 840. The amendments in ASU 2018-11 also provide lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead, to account for those components as a single component if the nonlease components otherwise would be accounted for under the new revenue guidance, ASC Topic 606 and if certain conditions are met. The amendments in ASU 2018-10 provide additional clarification and implementation guidance on certain aspects of the previously issued Accounting Standards Update No. 2016-02, Leases (Topic 842), or ASU 2016-02, and have the same effective and transition requirements as ASU 2016-02. Upon the effective date, ASU 2016-02 will supersede the current lease guidance in ASC Topic 840. Under the new guidance, lessees will be required to recognize for all leases, with the exception of short-term leases, a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis. Concurrently, lessees will be required to recognize a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 requires a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative periods presented in the financial statements. As noted above, ASU 2018-11 provides for an additional and optional transition method. We plan to apply the optional transition method at the adoption date and are currently evaluating the effects the adoption of ASU 2016-02 will have on our consolidated financial statements, results of operations and cash flows. In July 2018, the FASB issued Accounting Standards Update No. 2018-09, Codification Improvements, or ASU 2018-09. This amendment makes changes to a variety of topics to clarify, correct errors in, or make minor improvements to the Accounting Standards Codification. The majority of the amendments in ASU 2018-09 will be effective for us in annual periods beginning after December 15, 2018. We are currently evaluating the effects the adoption of ASU 2018-09 will have on our consolidated financial statements, results of operations and cash flows. There were no other new accounting pronouncements that were issued or became effective since the issuance of our 2017 Annual Report on Form 10-K that had, or are expected to have, a material impact on our consolidated financial position, results of operations or cash flows.

Basis of Presentation and Significant Accounting Policies

Basis of Presentation: The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for annual financial statements. We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2017 Annual Report on Form 10-K, unless the information contained in those disclosures materially changed or is required by GAAP. Certain prior year amounts have been reclassified to conform to the current year presentation or adjusted to conform to the current year rounding convention. In the opinion of management, all adjustments, including normal recurring adjustments, necessary for a fair statement of the consolidated financial statements as of and for the three and nine months ended September 30, 2018 and 2017 have been recorded. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2018, or any other period. These unaudited consolidated financial statements should be read in conjunction with our audited consolidated financial statements as of and for the year ended December 31, 2017 included in our 2017 Annual Report on Form 10-K.

Cash and Cash Equivalents: Certain of our subsidiaries operate outside of the United States and have functional currencies other than the U.S. dollar, or USD. We translate the assets and liabilities of those subsidiaries to USD using the exchange rate in effect at the end of the period. We translate the revenues and expenses of those subsidiaries to USD using the average exchange rates in effect during the period. The net effect of these translation adjustments is included in “Foreign currency translation adjustments” in our consolidated statements of comprehensive income. Additionally, we control a number of bank accounts that are used exclusively to hold customer funds for the administration of customer benefits and have cash and cash equivalents on deposit to meet certain regulatory requirements. These amounts totaled $243 and $182 at September 30, 2018 and December 31, 2017, respectively and are included in the cash and cash equivalents line on our consolidated balance sheets.

Revenue Recognition: Premiums for fully-insured contracts are recognized as revenue over the period insurance coverage is provided, and, if applicable, net of amounts recognized for the minimum medical loss ratio rebates or contractual or government-mandated premium stabilization programs. Administrative fees and other revenue includes revenue from certain group contracts that provide for the group to be at risk for all, or with supplemental insurance arrangements, a portion of their claims experience. We charge these self-funded groups an administrative fee, which is based on the number of members in a group or the group’s claim experience. Under our self-funded arrangements, revenue is recognized as administrative services are performed, and benefit payments under these programs are excluded from benefit expense. For additional information about our revenues, see Note 2, “Basis of Presentation and Significant Accounting Policies” and Note 19, “Segment Information,” to our audited consolidated financial statements as of and for the year ended December 31, 2017 included in our 2017 Annual Report on Form 10-K. In addition, see Note 15, “Segment Information,” herein for the disaggregation of revenues by segments and products.

Premium and self-funded receivables include the uncollected amounts from insured groups, individuals and government programs. Premium receivables are reported net of an allowance for doubtful accounts of $312 and $302 at September 30, 2018 and December 31, 2017, respectively. Self-funded receivables are reported net of an allowance for doubtful accounts of $40 and $153 at September 30, 2018 and December 31, 2017, respectively.

For our non-fully-insured contracts, we had no material contract assets, contract liabilities or deferred contract costs recorded on our consolidated balance sheet at September 30, 2018. For the three and nine months ended September 30, 2018, revenue recognized from performance obligations related to prior periods, such as due to changes in transaction price, was not material. For contracts that have an original expected duration of greater than one year, revenue expected to be recognized in future periods related to unfulfilled contractual performance obligations and contracts with variable consideration related to undelivered performance obligations is not material.

Recently Adopted Accounting Guidance: In February 2018, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, or ASU 2018-02. On December 22, 2017, the federal government enacted a tax bill, H.R.1, An act to provide for reconciliation pursuant to titles II and V of the concurrent resolution on the budget for fiscal year 2018, or the Tax Cuts and Jobs Act. The Tax Cuts and Jobs Act contains significant changes to corporate taxation, including, but not limited to, reducing the U.S. federal corporate income tax rate from 35% to 21% and modifying or limiting many business deductions. Current FASB guidance requires adjustments of deferred taxes due to a change in the federal corporate income tax rate to be included in income from operations. As a result, the tax effects of items within accumulated other comprehensive loss did not reflect the appropriate tax rate. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the change in the federal corporate income tax rate. We adopted the amendments in ASU 2018-02 for our interim and annual reporting periods beginning on January 1, 2018 and reclassified $91 of stranded tax effects from accumulated other comprehensive loss to retained earnings on our consolidated balance sheet. The adoption of ASU 2018-02 did not have any impact on our results of operations or cash flows.

In May 2017, the FASB issued Accounting Standards Update No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting, or ASU 2017-09. This update provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. We adopted ASU 2017-09 on January 1, 2018. The guidance has been and will be applied prospectively to awards modified on or after the adoption date. The adoption of ASU 2017-09 did not have any impact on our consolidated financial position, results of operations or cash flows.

In March 2017, the FASB issued Accounting Standards Update No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, or ASU 2017-07. This amendment requires entities to disaggregate the service cost component from the other components of the benefit cost and present the service cost component in the same income statement line item as other employee compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations. Certain of our defined benefit plans have previously been frozen, resulting in no annual service costs, and the remaining service costs for our non-frozen plan are not material. We adopted ASU 2017-07 on January 1, 2018 and it did not have a material impact on our results of operations, cash flows or consolidated financial position.

In December 2016, the FASB issued Accounting Standards Update No. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, or ASU 2016-20. In May 2016, the FASB issued Accounting Standards Update No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, or ASU 2016-12. In April 2016, the FASB issued Accounting Standards Update No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, or ASU 2016-10. In March 2016, the FASB issued Accounting Standards Update No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross verses Net), or ASU 2016-08. These updates provide additional clarification and implementation guidance on the previously issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), or ASU 2014-09. Collectively, these updates require a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. These updates supersede almost all existing revenue recognition guidance under GAAP, with certain exceptions, including an exception for our premium revenues, which are recorded on the Premiums line item on our consolidated statements of income and will continue to be accounted for in accordance with the provisions of Accounting Standards Codification, or ASC, Topic 944, Financial Services - Insurance. Our administrative service and other contracts that are subject to these Accounting Standards Updates are recorded in the Administrative fees and other revenue line item on our consolidated statements of income and represents approximately 6% of our consolidated total operating revenue. We adopted these standards on January 1, 2018 using the modified retrospective approach. The adoption of these standards did not have a material impact on our beginning retained earnings, results of operations, cash flows or consolidated financial position.

In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, or ASU 2016-18. This update amends ASC Topic 230 to add and clarify guidance on the classification and presentation of restricted cash in the statement of cash flows. The guidance requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. We adopted ASU 2016-18 on January 1, 2018 using a retrospective approach. The adoption of ASU 2016-18 did not have a material impact on our consolidated statements of cash flows and did not impact our results of operations or consolidated financial position.

In August 2016, the FASB issued Accounting Standards Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, or ASU 2016-15. This update addresses the presentation and classification on the statement of cash flows for eight specific items, with the objective of reducing existing diversity in practice in how certain cash receipts and cash payments are presented and classified. We adopted ASU 2016-15 on January 1, 2018. The adoption of ASU 2016-15 did not have a material impact on our consolidated statements of cash flows, results of operations or consolidated financial position.

In January 2016, the FASB issued Accounting Standards Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, or ASU 2016-01. The amendments in ASU 2016-01 change the accounting for non-consolidated equity investments that are not accounted for under the equity method of accounting by requiring changes in fair value to be recognized in income. Additionally, ASU 2016-01 simplifies the impairment assessment of equity investments without readily determinable fair values; requires entities to use the exit price when estimating the fair value of financial instruments; and modifies various presentation disclosure requirements for financial instruments. We adopted ASU 2016-01 on January 1, 2018 as a cumulative-effect adjustment and reclassified $320 of unrealized gains on equity investments, net of tax, from accumulated other comprehensive loss to retained earnings on our consolidated balance sheet. Effective January 1, 2018, our results of operations include the changes in fair value of these financial instruments.

Recent Accounting Guidance Not Yet Adopted: In August 2018, the FASB issued Accounting Standards Update No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract, or ASU 2018-15. The amendments in ASU 2018-15 require implementation costs incurred by customers in cloud computing arrangements to be deferred and recognized over the term of the arrangement, if those costs would be capitalized by the customer in a software licensing arrangement under the internal-use software guidance. The amendments also require an entity to disclose the nature of its hosting arrangements and adhere to certain presentation requirements in its balance sheet, income statement and statement of cash flows. ASU 2018-15 is effective for our interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The guidance can be applied either prospectively to all implementation costs incurred after the date of adoption or retrospectively. We are currently evaluating the effects the adoption of ASU 2018-15 will have on our consolidated financial position, results of operations and cash flows.

In August 2018, the FASB issued Accounting Standards Update No. 2018-14, Compensation—Retirement Benefits - Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans, or ASU 2018-14. The amendments in ASU 2018-14 eliminate, add, and modify certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments are effective for our annual reporting periods beginning after December 15, 2020, with early adoption permitted. The guidance is to be applied on a retrospective basis to all periods presented. We are currently evaluating the effects the adoption of ASU 2018-14 will have on our disclosures.

In August 2018, the FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, or ASU 2018-13. The amendments in ASU 2018-13 eliminate, add, and modify certain disclosure requirements for fair value measurements. The amendments are effective for our interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted for either the entire ASU or only the provisions that eliminate or modify requirements. The amendments with respect to changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty are to be applied prospectively. All other amendments are to be applied retrospectively to all periods presented. We are currently evaluating the effects the adoption of ASU 2018-13 will have on our disclosures.

In August 2018, the FASB issued Accounting Standards Update No. 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts, or ASU 2018-12. The amendments in ASU 2018-12 make changes to a variety of areas to simplify or improve the existing recognition, measurement, presentation and disclosure requirements for long-duration contracts issued by an insurance entity. The amendments require insurers to annually review the assumptions they make about their policyholders and update the liabilities for future policy benefits if the assumptions change. The amendments also simplify the amortization of deferred contract acquisition costs and add new disclosure requirements about the assumptions insurers use to measure their liabilities and how they may affect future cash flows. The amendments in ASU 2018-12 will be effective for our interim and annual reporting periods beginning after December 15, 2020. The amendments related to the liability for future policy benefits for traditional and limited-payment contracts and deferred acquisition costs are to be applied to contracts in force as of the beginning of the earliest period presented, with an option to apply such amendments retrospectively with a cumulative-effect adjustment to the opening balance of retained earnings as of the earliest period presented. The amendments for market risk benefits are to be applied retrospectively. We are currently evaluating the effects the adoption of ASU 2018-12 will have on our consolidated financial position, results of operations, cash flows, and related disclosures.

In July 2018, the FASB issued Accounting Standards Update No. 2018-11, Leases (Topic 842): Targeted Improvements, or ASU 2018-11, and Accounting Standards Update No. 2018-10, Codification Improvements to Topic 842, Leases, or ASU 2018-10. The amendments in ASU 2018-11 provide for an additional and optional transition method that allows an entity to initially apply ASC Topic 842 at the adoption date and recognize a cumulative effect adjustment to its opening balance of retained earnings in the period of adoption and continue its reporting for the comparative periods presented in accordance with the current lease guidance, ASC Topic 840. The amendments in ASU 2018-11 also provide lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead, to account for those components as a single component if the nonlease components otherwise would be accounted for under the new revenue guidance, ASC Topic 606 and if certain conditions are met. The amendments in ASU 2018-10 provide additional clarification and implementation guidance on certain aspects of the previously issued Accounting Standards Update No. 2016-02, Leases (Topic 842), or ASU 2016-02, and have the same effective and transition requirements as ASU 2016-02. Upon the effective date, ASU 2016-02 will supersede the current lease guidance in ASC Topic 840. Under the new guidance, lessees will be required to recognize for all leases, with the exception of short-term leases, a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis. Concurrently, lessees will be required to recognize a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 requires a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative periods presented in the financial statements. As noted above, ASU 2018-11 provides for an additional and optional transition method. We plan to apply the optional transition method at the adoption date and are currently evaluating the effects the adoption of ASU 2016-02 will have on our consolidated financial statements, results of operations and cash flows.

In July 2018, the FASB issued Accounting Standards Update No. 2018-09, Codification Improvements, or ASU 2018-09. This amendment makes changes to a variety of topics to clarify, correct errors in, or make minor improvements to the Accounting Standards Codification. The majority of the amendments in ASU 2018-09 will be effective for us in annual periods beginning after December 15, 2018. We are currently evaluating the effects the adoption of ASU 2018-09 will have on our consolidated financial statements, results of operations and cash flows.

There were no other new accounting pronouncements that were issued or became effective since the issuance of our 2017 Annual Report on Form 10-K that had, or are expected to have, a material impact on our consolidated financial position, results of operations or cash flows.