GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by business segment

A rollforward of goodwill by business segment for the years ended December 31, 2017 and 2016, is presented in the table below:

	Consumer &
	Business		Commercial			Vehicle				Treasury/			Huntington
(dollar amounts in millions)	Banking		Banking			Finance		RBHPCG		Other			Consolidated
Balance, January 1, 2016	$	368	$	215		$	—	$	89	$	5		$	677
Goodwill acquired during the period	1,030		238			—		53		—			1,321
Adjustments	—		—			—		—		(5		)	(5		)
Balance, December 31, 2016	1,398		453			—		142		—			1,993
Adjustments	—		(28		)	—		28		—			—
Balance, December 31, 2017	$	1,398	$	425		$	—	$	170	$	—		$	1,993

Summary of other intangible assets

At December 31, 2017 and 2016, Huntington’s other intangible assets consisted of the following:

(dollar amounts in millions)	Gross Carrying Amount			Accumulated Amortization			Net Carrying Value
December 31, 2017
Core deposit intangible	$	325		$	(61	)	$	264
Customer relationship	190			(108		)	82
Total other intangible assets	$	515		$	(169	)	$	346
December 31, 2016
Core deposit intangible	$	325		$	(27	)	$	298
Customer relationship	195		(1)	(91		)	104
Total other intangible assets	$	520		$	(118	)	$	402

Estimated amortization expense of other intangible assets

The estimated amortization expense of other intangible assets for the next five years is as follows:

(dollar amounts in millions)	Amortization Expense
2018	$	53
2019	50
2020	42
2021	40
2022	38