Quarterly report pursuant to Section 13 or 15(d)

VIEs - Unconsolidated VIEs (Details)

v3.10.0.1
VIEs - Unconsolidated VIEs (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Trust 2016 Unconsolidated [Member]    
Variable Interest Entity [Line Items]    
Total Assets $ 4 $ 7
Total Liabilities 1 0
Maximum Exposure to Loss 4 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 625 636
Total Liabilities 293 335
Maximum Exposure to Loss 625 636
Other Investments    
Variable Interest Entity [Line Items]    
Total Assets 135 117
Total Liabilities 62 53
Maximum Exposure to Loss 135 117
Total    
Variable Interest Entity [Line Items]    
Total Assets 778 775
Total Liabilities 608 640
Maximum Exposure to Loss $ 764 $ 761