| Document Information | May 31, 2019 |
| Document Information [Line Items] | |
| Document Type | 8-K/A |
| Document Period End Date | May 31, 2019 |
| 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 |
| 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 | true |
| Amendment Description | Bank will continue its practice of including a nonbinding advisory shareholder vote on the compensation of named executive officers in its proxy materials each year until the Bank holds its next frequency vote, which will occur no later than the Bank’s 2025 Annual Meeting of Shareholders |
| Entity Central Index Key | 0000109380 |
| Amendment Description | Bank will continue its practice of including a nonbinding advisory shareholder vote on the compensation of named executive officers in its proxy materials each year until the Bank holds its next frequency vote, which will occur no later than the Bank’s 2025 Annual Meeting of Shareholders |
| Common Stock [Member] | NASDAQ - ALL MARKETS [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.001 |
| Trading Symbol | ZION |
| Security Exchange Name | NASDAQ |
| Title of 12(b) Security | Common Stock, par value $0.001 |
| Trading Symbol | ZION |
| Warrant [Member] | NASDAQ - ALL MARKETS [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants to Purchase Common Stock (expiring May 22, 2020) |
| Trading Symbol | ZIONW |
| Security Exchange Name | NASDAQ |
| Title of 12(b) Security | Warrants to Purchase Common Stock (expiring May 22, 2020) |
| Trading Symbol | ZIONW |
| Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZB/A |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZB/A |
| Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZB/G |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZB/G |
| Series H 5.75% Non-Cumulative Perpetual Preferred Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Series H 5.75% Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZB/H |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Series H 5.75% Non-Cumulative Perpetual Preferred Stock |
| Trading Symbol | ZB/H |
| Fixed-to-Floating 6.95% Rate Subordinated Notes Due September 14, 2028 [Member] | NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 6.95% Fixed-to-Floating Rate Subordinated Notes due September 15, 2028 |
| Trading Symbol | ZBK |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | 6.95% Fixed-to-Floating Rate Subordinated Notes due September 15, 2028 |
| Trading Symbol | ZBK |
