Deposits - Schedule of Maturities of Time Deposits (Details) $ in Millions	Dec. 31, 2016 USD ($)
Deposits [Abstract]
Due in one year or less	$ 3,730
Due after one year through two years	1,295
Due after two years through three years	335
Due after three years through four years	126
Due after four years through five years	193
Due after five years	2
Total	$ 5,681