Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details)

v3.8.0.1
Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Intangible Assets [Abstract]    
Gross Carrying Value $ 13,640 $ 14,553
Accumulated Amortization 11,182 11,564
Net Carrying Value 2,458 2,989
International Consumer Credit Card Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations    
Intangible Assets [Abstract]    
Disposal group, intangible assets   67
Trade Names    
Intangible Assets [Abstract]    
Intangible assets, net (excluding goodwill) 1,600 1,600
Purchased credit card relationships    
Intangible Assets [Abstract]    
Gross Carrying Value 5,919 6,830
Accumulated Amortization 5,553 6,243
Net Carrying Value 366 587
Core deposit intangibles    
Intangible Assets [Abstract]    
Gross Carrying Value 3,835 3,836
Accumulated Amortization 2,120 2,046
Net Carrying Value 1,715 1,790
Customer relationships    
Intangible Assets [Abstract]    
Gross Carrying Value 3,886 3,887
Accumulated Amortization 3,509 3,275
Net Carrying Value $ 377 $ 612