XML 133 R85.htm IDEA: XBRL DOCUMENT v3.8.0.1
Deposits (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Deposits By Type [Abstract]    
Sweep deposits $ 37,734 $ 26,362
Savings deposits 2,912 3,185
Other deposits(1) 2,096 2,135
Total deposits $ 42,742 $ 31,682
Deposits, Weighted Average Rates [Abstract]    
Sweep deposits, weighted-average rate 0.01% 0.01%
Savings deposits, weighted-average rate 0.01% 0.01%
Other deposits, weighted-average rate 0.03% 0.03%
Total deposits, weighted-average rate 0.01% 0.01%
Deposits Textuals [Abstract]    
Non-interest-bearing deposits $ 207 $ 177