Mortgage Banking Activity (Tables)

9 Months Ended

Sep. 30, 2021

Mortgage Banking [Abstract]

Schedule of Residential Mortgage Loans Held For Sale

The following table summarizes activity relating to residential mortgage loans held for sale as of the nine months ended September 30, 2021 and the year ended December 31, 2020.

(Dollars in millions)	September 30, 2021		December 31, 2020
Balance at beginning of period	$	409	$	4
Acquired	—		320
Originations and purchases	2,154		2,499
Sales, net of gains	(2,302)		(2,405)
Mortgage loans transferred from (to) held for investment	30		(9)
Balance at end of period	$	291	$	409

Schedule of Mortgage Servicing Rights

Mortgage servicing rights had the following carrying values as of the periods indicated.

	September 30, 2021						December 31, 2020
(Dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Mortgage servicing rights	$	36	$	(7)	$	29	$	28	$	(3)	$	25