Mortgage Banking Activity (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 2021 and the year ended December 31, 2020.

(Dollars in millions)	March 31, 2021		December 31, 2020
Balance at beginning of period	$	409	$	4
Acquired	—		320
Originations and purchases	446		2,499
Sales, net of gains	(421)		(2,405)
Mortgage loans transferred from (to) held for investment	3		(9)
Balance at end of period	$	437	$	409

Schedule of Mortgage Servicing Rights

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

	March 31, 2021
(Dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Mortgage servicing rights	$	31	$	(4)	$	27

	December 31, 2020
(Dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Mortgage servicing rights	$	28	$	(3)	$	25