FASB Issues Proposed Taxonomy Implementation Guide for Disaggregation of Income Statement Expenses

The Financial Accounting Standards Board (FASB) has published a proposed Taxonomy Implementation Guide, Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (Guide) based on the 2025 GAAP Financial Reporting Taxonomy. The proposed Guide demonstrates the modeling for the reporting of the disaggregation of income statement expenses under FASB Accounting Standards Codification Subtopic 220-40 through examples and focuses on detail tagging only (Level 4).

The public comment period will end on September 19, 2025. Comments should be submitted directly to the FASB. The SEC staff encourages filers, investors, analysts, software service providers, and other interested parties to participate in this public review to continue to improve the process for creating and using XBRL-structured financial statements.