Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

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

Dollars in millions	Consumer Bank		Commercial Bank		Total(a)
BALANCE AT DECEMBER 31, 2023	$	1,819	$	933	$	2,752
BALANCE AT DECEMBER 31, 2024	1,819		933		2,752
BALANCE AT DECEMBER 31, 2025	$	1,819	$	933	$	2,752

(a) There were no accumulated impairment losses related to any of Key’s reporting units at December 31, 2025, December 31, 2024, and December 31, 2023.

Schedule of 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:

	2025				2024
December 31, Dollars in millions	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Intangible assets subject to amortization:
Core deposit intangibles	$	356	$	352	$	356	$	342
PCCR intangibles	16		16		16		16
Other intangible assets	154		150		154		141
Total	$	526	$	518	$	526	$	499

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

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

	Estimated
Dollars in millions	2026		2027		2028		2029		2030
Intangible asset amortization expense	$	7	$	1	$	—	$	—	$	—