Deposits (Schedule of Maturities of Time Deposits) (Details) $ in Millions	Mar. 31, 2020 USD ($)
Time deposits, remaining contractual maturity:
Within one year	$ 9,011.2
One to two years	1,889.5
Two to three years	394.5
Three to four years	456.3
Four to five years	561.9
Over five years	117.4
Total Time deposits	$ 12,430.8