Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible assets consisted of the following:

At December 31 (Dollars in Millions)	Estimated Life(a)	Amortization Method(b)		Balance
				2017		2016
Goodwill			(c)	$	9,434	$	9,344
Merchant processing contracts	7 years/8 years		SL/AC		89		108
Core deposit benefits	22 years/5 years		SL/AC		131		161
Mortgage servicing rights			(c)		2,645		2,591
Trust relationships	10 years/7 years		SL/AC		45		59
Other identified intangibles	6 years/4 years		SL/AC		318		384
Total				$	12,662	$	12,647

(a) Estimated life represents the amortization period for assets subject to the straight line method and the weighted average or life of the underlying cash flows amortization period for intangibles subject to accelerated methods. If more than one amortization method is used for a category, the estimated life for each method is calculated and reported separately.

(b) Amortization methods:         SL = straight line method

                                                      AC = accelerated methods generally based on cash flows

(c) Goodwill is evaluated for impairment, but not amortized. Mortgage servicing rights are recorded at fair value, and are not amortized.

Aggregate Amortization Expense

Aggregate amortization expense consisted of the following:    

Year Ended December 31 (Dollars in Millions)	2017		2016		2015
Merchant processing contracts	$	24	$	28	$	35
Core deposit benefits		30		34		40
Trust relationships		14		16		21
Other identified intangibles		107		101		78
Total	$	175	$	179	$	174

Estimated Amortization Expense

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

(Dollars in Millions)
2018	$	148
2019		119
2020		93
2021		71
2022		51

Changes in Carrying Value of Goodwill

The following table reflects the changes in the carrying value of goodwill for the years ended December 31, 2017, 2016 and 2015:

(Dollars in Millions)	Corporate and Commercial Banking			Consumer and Business Banking		Wealth Management and Investment Services			Payment Services			Treasury and Corporate Support		Consolidated Company
Balance at December 31, 2014	$	1,648		$	3,680	$	1,570		$	2,491		$	–	$	9,389
Foreign exchange translation and other		(1	)		1		(3	)		(25	)		–		(28	)
Balance at December 31, 2015	$	1,647		$	3,681	$	1,567		$	2,466		$	–	$	9,361
Foreign exchange translation and other		–			–		(1	)		(16	)		–		(17	)
Balance at December 31, 2016	$	1,647		$	3,681	$	1,566		$	2,450		$	–	$	9,344
Goodwill acquired		–			–		–			62			–		62
Foreign exchange translation and other		–			–		3			25			–		28
Balance at December 31, 2017	$	1,647		$	3,681	$	1,569		$	2,537		$	–	$	9,434