Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amounts of Goodwill Attributable to Operating Segments

The changes in the carrying amount of goodwill attributable to operating segments are reflected in the table below:

Year Ended December 31, (Dollars in millions)	2018
	CB-Retail		CB-Commercial		FS&CF			IH		Total			2017			2016
Goodwill, beginning balance	$	3,724	$	3,862	$	259		$	1,773	$	9,618		$	9,638		$	8,548
Acquisitions	—		—		—			201		201			—			1,073
Adjustments	—		—		(1		)	—		(1		)	(20		)	17
Goodwill, ending balance	$	3,724	$	3,862	$	258		$	1,974	$	9,818		$	9,618		$	9,638

Identifiable Intangible Assets Subject to Amortization

The following table, which excludes fully amortized intangibles, presents information for identifiable intangible assets:

		2018							2017
December 31, (Dollars in millions)	Wtd. Avg. Remaining Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
CDI	6.2 years	$	605	$	(460	)	$	145	$	605	$	(409	)	$	196
Other, primarily customer relationship intangibles	11.8	1,329		(716		)	613		1,211		(696		)	515
Total		$	1,934	$	(1,176	)	$	758	$	1,816	$	(1,105	)	$	711

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated amortization expense for the next five years is presented as follows:

Year Ended December 31, (Dollars in millions)
	2019		2020		2021		2022		2023
Estimated amortization expense of identifiable intangibles	$	121	$	104	$	90	$	78	$	56