Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

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, 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
KIBS divestiture	(22		)	—		(22		)
BALANCE AT DECEMBER 31, 2018	$	2,102		$	414	$	2,516

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:

	2018				2017
December 31, in millions	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Intangible assets subject to amortization:
Core deposit intangibles	$	396	$	184	$	461	$	192
PCCR intangibles	152		138		152		126
Other intangible assets	115		25		128		7
Total	$	663	$	347	$	741	$	325

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
in millions	2019		2020		2021		2022		2023
Intangible asset amortization expense	$	80	$	62	$	52	$	42	$	34