Goodwill And Other Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

. GOODWILL AND OTHER INTANGIBLE ASSETS

Core deposit and other intangible assets and related accumulated amortization are as follows at December 31:

	Gross carrying amount				Accumulated amortization						Net carrying amount
(In millions)	2018		2017		2018			2017			2018		2017
Core deposit intangibles	$	167	$	167	$	(166	)	$	(165	)	$	1	$	2
Customer relationships and other intangibles	28		28		(28		)	(28		)	—		—
Total	$	195	$	195	$	(194	)	$	(193	)	$	1	$	2

The amount of amortization expense of core deposit and other intangible assets is separately reflected in the statement of income. Estimated amortization expense for core deposit and other intangible assets is $1 million in 2019, and nothing thereafter.

Changes in the carrying amount of goodwill for operating segments with goodwill are as follows:

(In millions)	Zions Bank		CB&T		Amegy		Consolidated Bank
Balance at December 31, 2016	$	20	$	379	$	615	$	1,014
Impairment losses	—		—		—		—
Balance at December 31, 2017	20		379		615		1,014
Impairment losses	—		—		—		—
Balance at December 31, 2018	$	20	$	379	$	615	$	1,014

A bank-wide annual impairment test is conducted as of October 1st of each year and updated on a more frequent basis when events or circumstances indicate that impairment could have taken place. Results of the testing for 2018 and 2017 concluded that no impairment was present in any of the operating segments.