Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The following table shows the changes in the carrying amount of goodwill by reporting unit.

in millions	Key Community Bank			Key Corporate Bank			Total
BALANCE AT DECEMBER 31, 2015	$	979		$	81		$	1,060
Acquisition of First Niagara	1,109			277			1,386
BALANCE AT DECEMBER 31, 2016	2,088			358			2,446
Tax adjustment on previous fair value measurements	(15		)	(4		)	(19		)
Loan adjustment on previous fair value measurements	30			7			37
BALANCE AT JUNE 30, 2017	$	2,103		$	361		$	2,464

Changes in the carrying amount of goodwill by reporting unit are presented in the following table:

in millions	Key Community Bank		Key Corporate Bank		Total
BALANCE AT DECEMBER 31, 2015	$	979	$	81	$	1,060
Acquisition of First Niagara	1,109		277		1,386
BALANCE AT DECEMBER 31, 2016	2,088		358		2,446
Fair value measurement adjustments - First Niagara acquisition	15		3		18
Additional ownership interest in Key Merchant Services	4		—		4
Acquisition of HelloWallet	17		—		17
Acquisition of Cain Brothers	—		53		53
BALANCE AT DECEMBER 31, 2017	$	2,124	$	414	$	2,538

Gross Carrying Amount and Accumulated Amortization of Intangible Assets

The following table shows the gross carrying amount and the accumulated amortization of intangible assets subject to amortization:

	2017				2016
December 31, in millions	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Intangible assets subject to amortization:
Core deposit intangibles	$	461	$	192	$	461	$	125
PCCR intangibles	152		126		152		110
Other intangible assets (a)	128		7		74		68
Total	$	741	$	325	$	687	$	303

(a) Carrying amount and accumulated amortization excludes $18 million at December 31, 2016, related to the discontinued operations of Austin and the sale of Victory.

Schedule of Acquired Finite-Lived Intangible Assets by Major Class

Intangible assets acquired during the year ended December 31, 2017 were as follows:

in millions	KMS		HelloWallet		Cain Brothers		Total
Intangible assets subject to amortization:
Customer relationships	$	85	—		$	29	$	114
Trade name	—		—		1		1
Proprietary software	—		$	12	—		12
Total	$	85	$	12	$	30	$	127

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table presents estimated intangible asset amortization expense for the next five years.

	Estimated
	2018		2019		2020		2021		2022
Intangible asset amortization expense	$	96	$	79	$	64	$	52	$	42