Goodwill And Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Amortizing Intangible Assets

	Gross carrying amount				Accumulated amortization				Net carrying amount
(In millions)	2019		2018		2019		2018		2019		2018
Core deposit intangibles	$	167	$	167	$	(167)	$	(166)	$	—	$	1
Customer relationships and other intangibles	28		28		(28)		(28)		—		—
Total	$	195	$	195	$	(195)	$	(194)	$	—	$	1

Schedule Of Goodwill

(In millions)	Zions Bank		CB&T		Amegy		Consolidated Bank
Balance at December 31, 2017	$	20	$	379	$	615	$	1,014
Impairment losses	—		—		—		—
Balance at December 31, 2018	20		379		615		1,014
Impairment losses	—		—		—		—
Balance at December 31, 2019	$	20	$	379	$	615	$	1,014