Deposits - Schedule of Maturities of Time Deposits (Details) $ in Millions	Dec. 31, 2019 USD ($)
Deposits [Abstract]
Due in one year or less	$ 14,029
Due after one year through two years	1,119
Due after two years through three years	356
Due after three years through four years	70
Due after four years through five years	77
Due after five years	0
Total	$ 15,700