| Document and Entity Information Document | Jul. 19, 2021 | Oct. 19, 2020 |
| Entity Information [Line Items] | ||
| Document Type | 8-K | |
| Document Period End Date | Jul. 19, 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] | Series H Preferred Stock [Member] | ||
| Entity Information [Line Items] | ||
| Title of 12(b) Security | Series H 5.75% Non-Cumulative Perpetual Preferred Stock | |
| Trading Symbol | ZIONN | |
| 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 |
