Recently Issued Accounting Standards	9 Months Ended
Recently Issued Accounting Standards	Sep. 30, 2017
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recently Issued Accounting Standards	2. Recently Issued Accounting Standards In May 2014, the Financial Accounting Standards Board issued a new standard, Revenue from Contracts with Customers. The standard establishes a single revenue recognition model for all contracts with customers, eliminates industry specific requirements, and expands disclosure requirements. The standard is required to be adopted beginning January 1, 2018. “Sales and Other Operating Revenue” on the Consolidated Statement of Income includes sales, excise and value-added taxes on sales transactions. When the Corporation adopts the standard, revenue will exclude sales-based taxes collected on behalf of third parties. This change in reporting will not impact earnings. The Corporation expects to adopt the standard using the Modified Retrospective method, under which prior years’ results are not restated, but supplemental information on the impact of the new standard is provided for 2018 results. The Corporation continues to evaluate other areas of the standard, which are not expected to have a material effect on the Corporation’s financial statements. In January 2016, the Financial Accounting Standards Board issued an updated standard, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The standard requires investments in equity securities other than consolidated subsidiaries and equity method investments to be measured at fair value with changes in the fair value recognized through net income. Companies can elect a modified approach for equity securities that do not have a readily determinable fair value. ExxonMobil is evaluating the standard and its effect on the Corporation’s financial statements and plans to adopt it in 2018. In March 2017, the Financial Accounting Standards Board issued an Accounting Standards Update, Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The update requires the service cost component of net benefit costs to be reported in the same line of the income statement as other compensation costs and the other components of net benefit costs (non-service costs) to be presented separately from the service cost component. Additionally, only the service cost component of net benefit costs will be eligible for capitalization. The update is required to be adopted beginning January 1, 2018. The Corporation expects to add a new line “Non-service pension and postretirement benefit expense” to its Consolidated Statement of Income. This line would reflect the non-service costs that were previously included in “Production and manufacturing expenses” and “Selling, general and administrative expenses”. The update is not expected to have a material impact on the Corporation’s financial statements. Beginning January 1, 2018, the Corporation expects to include all of the non-service costs in its Corporate and financing segment. In February 2016, the Financial Accounting Standards Board issued a new standard, Leases. The standard requires all leases with an initial term greater than one year be recorded on the balance sheet as an asset and a lease liability. ExxonMobil is evaluating the standard and its effect on the Corporation’s financial statements and plans to adopt it in 2019.