Quarterly report pursuant to Section 13 or 15(d)

VIEs - Unconsolidated VIEs (Details)

v3.10.0.1
VIEs - Unconsolidated VIEs (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
2016-1 Automobile Trust    
Variable Interest Entity [Line Items]    
Total Assets $ 3 $ 7
Total Liabilities 1 0
Maximum Exposure to Loss 3 7
2015-1 Automobile Trust    
Variable Interest Entity [Line Items]    
Total Assets 0 1
Total Liabilities 0 0
Maximum Exposure to Loss 0 1
Trust Preferred Securities    
Variable Interest Entity [Line Items]    
Total Assets 14 14
Total Liabilities 252 252
Maximum Exposure to Loss 0 0
Affordable Housing Tax Credit Partnerships    
Variable Interest Entity [Line Items]    
Total Assets 683 636
Total Liabilities 345 335
Maximum Exposure to Loss 683 636
Other Investments    
Variable Interest Entity [Line Items]    
Total Assets 125 117
Total Liabilities 54 53
Maximum Exposure to Loss 125 117
Total    
Variable Interest Entity [Line Items]    
Total Assets 825 775
Total Liabilities 652 640
Maximum Exposure to Loss $ 811 $ 761