Cover - shares	9 Months Ended
	Sep. 30, 2020	Oct. 28, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-12307
Entity Registrant Name	ZIONS BANCORPORATION, NATIONAL ASSOCIATION
Entity Incorporation, State or Country Code	X1
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		164,011,595
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000109380
Current Fiscal Year End Date	--12-31
Common stock | The NASDAQ Stock Market LLC [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.001
Trading Symbol	ZION
Security Exchange Name	NASDAQ
Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] | The NASDAQ Stock Market LLC [Member]
Document Information [Line Items]
Title of 12(b) Security	Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock
Trading Symbol	ZIONP
Security Exchange Name	NASDAQ
Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] | The NASDAQ Stock Market LLC [Member]
Document 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
Series H 5.75% Non-Cumulative Perpetual Preferred Stock [Member] | The NASDAQ Stock Market LLC [Member]
Document Information [Line Items]
Title of 12(b) Security	Series H 5.75% Non-Cumulative Perpetual Preferred Stock
Trading Symbol	ZIONN
Security Exchange Name	NASDAQ
Fixed-to-Floating Rate Subordinated Notes [Member] | The NASDAQ Stock Market LLC [Member]
Document 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