XML 59 R33.htm IDEA: XBRL DOCUMENT
v3.25.2

COMMITMENTS, GUARANTEES AND CONTINGENT LIABILITIES (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Commitments, Guarantees, and Contingent Liabilities [Abstract] |
Schedule of Off Balance Sheet Financial Instruments | The following schedule presents the contractual amounts related to off-balance sheet financial instruments used to support our customers’ financing needs:
(In millions) | June 30, 2025 |  | December 31, 2024
Unfunded lending commitments 1 | $ | 28,688 |  |  | $ | 28,767 |
Standby letters of credit: |  |  |
Financial | 600 |  |  | 574 |
Performance | 246 |  |  | 262 |
Commercial letters of credit | 30 |  |  | 15 |
Total unfunded commitments | $ | 29,564 |  |  | $ | 29,618 |
1 Net of participations.

X
- Definition Tabular disclosure of each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
Name: | us-gaap_ScheduleOfGuaranteeObligationsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Guarantees, Commitments And Contingencies [Abstract] + References No definition available. + Details
Name: | zions_CommitmentsGuaranteesAndContingentLiabilitiesAbstract
Namespace Prefix: | zions_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration