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Summary of Significant Accounting Policies | 9 Months Ended
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Sep. 30, 2025
Accounting Standards Update and Change in Accounting Principle [Abstract] |
Summary of Significant Accounting Policies | Summary of Significant Accounting Policies The accounting and reporting policies of the Corporation conform to U.S. GAAP and to general practice within the financial services industry. A discussion of these policies can be found in Note 1 Summary of Significant Accounting Policies included in the Corporation’s 2024 Annual Report on Form 10-K. Future Accounting Pronouncements The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review.
Standard | Description | Date of Anticipated Adoption | Effect on Financial Statements
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures | The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and are to be applied on a prospective basis. Early adoption is permitted. | Annual period ending December 31, 2025 | The Corporation will adopt the enhanced income tax related disclosures within the consolidated financial statements for the year ended December 31, 2025.
ASU 2024-03 Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40) | The amendments in this update require a public business entity to disclose specific information about certain costs and expenses in the notes to its financial statements for interim and annual reporting periods. The objective of the disclosure requirements is to provide disaggregated information about a public business entity's expenses to help investors (a) better understand the entity's performance, (b) better assess the entity's prospects for future cash flows, and (c) compare an entity's performance over time and with that of other entities. The amendments in this update are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. | Annual period ending December 31, 2027 and subsequent interim periods | The Corporation is currently evaluating the impact on its disclosures.
ASU 2025-06 Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) | The amendments in this update simplify the capitalization guidance by removing all references to prescriptive and sequential software development stages to align with the shift to incremental and iterative software development methods. | Interim period ending March 31, 2028 and subsequent periods | The Corporation is currently evaluating the impact on its disclosures.

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