Cover - shares	9 Months Ended
	Sep. 30, 2019	Oct. 31, 2019
Document Information [Line Items]
Entity Address, City or Town	Salt Lake City,
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	ZIONS BANCORPORATION, NATIONAL ASSOCIATION
Entity Central Index Key	0000109380
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		170,463,865
Entity Emerging Growth Company	false
Entity Small Business	false
Entity File Number	001-12307
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Tax Identification Number	87-0189025
City Area Code	801
Local Phone Number	844-7637
Entity Address, Address Line One	One South Main
Entity Address, State or Province	UT
Entity Address, Postal Zip Code	84133-1109
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	X1
Entity Interactive Data Current	Yes
Common Stock [Member] | NASDAQ - ALL MARKETS [Member]
Document Information [Line Items]
Trading Symbol	ZION
Title of 12(b) Security	Common Stock, par value $0.001
Security Exchange Name	NASDAQ
Warrant [Member] | NASDAQ - ALL MARKETS [Member]
Document Information [Line Items]
Trading Symbol	ZIONW
Title of 12(b) Security	Warrants to Purchase Common Stock (expiring May 22, 2020)
Security Exchange Name	NASDAQ
Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Document Information [Line Items]
Trading Symbol	ZB/A
Title of 12(b) Security	Series A Floating-Rate Non-Cumulative Perpetual Preferred Stock
Security Exchange Name	NYSE
Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Document Information [Line Items]
Trading Symbol	ZB/G
Title of 12(b) Security	Series G Fixed/Floating-Rate Non-Cumulative Perpetual Preferred Stock
Security Exchange Name	NYSE
Series H 5.75% Non-Cumulative Perpetual Preferred Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Document Information [Line Items]
Trading Symbol	ZB/H
Title of 12(b) Security	Series H 5.75% Non-Cumulative Perpetual Preferred Stock
Security Exchange Name	NYSE
Fixed-to-Floating Rate Subordinated Notes [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Document Information [Line Items]
Trading Symbol	ZBK
Title of 12(b) Security	6.95% Fixed-to-Floating Rate Subordinated Notes due September 15, 2028
Security Exchange Name	NYSE