Quarterly report pursuant to Section 13 or 15(d)

VIEs - Unconsolidated VIEs (Details)

v3.8.0.1
VIEs - Unconsolidated VIEs (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Trust 2016 Unconsolidated [Member]    
Variable Interest Entity [Line Items]    
Total Assets $ 6 $ 7
Total Liabilities 1 0
Maximum Exposure to Loss 6 7
2015-1 Automobile Trust    
Variable Interest Entity [Line Items]    
Total Assets 1 1
Total Liabilities 0 0
Maximum Exposure to Loss 1 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 634 636
Total Liabilities 320 335
Maximum Exposure to Loss 634 636
Other Investments    
Variable Interest Entity [Line Items]    
Total Assets 122 117
Total Liabilities 57 53
Maximum Exposure to Loss 122 117
Total    
Variable Interest Entity [Line Items]    
Total Assets 777 775
Total Liabilities 630 640
Maximum Exposure to Loss $ 763 $ 761