Changes in the net carrying amount of goodwill, by reporting unit, for the nine months ended September 30, 2019 and the year ended December 31, 2018 were as follows:

Wealth

General

Commercial

Branch

Consumer

and Asset

Corporate

($ in millions)

Banking

Lending

Management

and Other

Total

Goodwill

$

1,363

1,655

215

177

-

3,410

Accumulated impairment losses

(750)

-

(215)

-

(965)

Net carrying value as of December 31, 2017

$

613

1,655

-

177

-

2,445

Acquisition activity

17

-

16

-

33

Net carrying value as of December 31, 2018

$

630

1,655

-

193

-

2,478

Acquisition activity

1,352

399

-

64

-

1,815

Sale of business

-

(3)

-

(3)

Net carrying value as of September 30, 2019

$

1,982

2,054

-

254

-

4,290