Deposits (Schedule of $100,000 or More Certificates of Deposit Maturities) (Details) - USD ($) $ in Millions		Sep. 30, 2020	Dec. 31, 2019
Deposits [Abstract]
Three months or less		$ 1,734
Over three months through six months		2,375
Over six months through twelve months		3,166
Over twelve months		2,496
Total	[1]	$ 9,771	$ 9,268

[1] Includes $2.8 billion and $2.6 billion in certificates of deposit equal to or greater than $250,000, the Federal Deposit Insurance Corporation ("FDIC") insurance limit, as of September 30, 2020 and December 31, 2019, respectively.