Mortgage Banking Activity (Tables)

12 Months Ended

Dec. 31, 2020

Mortgage Banking [Abstract]

Schedule of Mortgage Loans Held-for-Sale

The following table summarizes activity relating to residential mortgage loans held for sale for the year ended December 31, 2020:

(Dollars in millions)	Year ended December 31, 2020
Balance at beginning of period	$	4
Acquired	320
Originations and purchases	2,499
Sales, net of gains	(2,405)
Mortgage loans transferred to held for investment	(9)
Balance at end of period	$	409

Servicing Asset at Amortized Cost

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

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