| Document and Entity Information Document | Oct. 18, 2021 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 18, 2021 |
| Entity Registrant Name | ZIONS BANCORPORATION, NATIONAL ASSOCIATION |
| Entity Incorporation, State or Country Code | X1 |
| Entity File Number | 001-12307 |
| Entity Tax Identification Number | 87-0189025 |
| Entity Address, Address Line One | One South Main, |
| Entity Address, City or Town | Salt Lake City, |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84133-1109 |
| City Area Code | 801 |
| Local Phone Number | 844-7637 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000109380 |
| NASDAQ - ALL MARKETS [Member] | Common Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.001 |
| Trading Symbol | ZION |
| Security Exchange Name | NASDAQ |
| NEW YORK STOCK EXCHANGE, INC. [Member] | Series A Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZIONP |
| Security Exchange Name | NASDAQ |
| NEW YORK STOCK EXCHANGE, INC. [Member] | Series G Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZIONO |
| Security Exchange Name | NASDAQ |
| NEW YORK STOCK EXCHANGE, INC. [Member] | Senior Subordinated Notes [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 6.95% Fixed-to-Floating Rate Subordinated Notes due September 15, 2028 |
| Trading Symbol | ZIONL |
| Security Exchange Name | NASDAQ |
