Quarterly report pursuant to Section 13 or 15(d)

Securities - Amortized Cost, Gains and Losses, and Fair Value Available-for-sale (Details)

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Securities - Amortized Cost, Gains and Losses, and Fair Value Available-for-sale (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Available-for-sale Debt Securities:    
Amortized Cost $ 300,860  
Amortized Cost   $ 296,579
Gross Unrealized Gains 1,405 1,280
Gross Unrealized Losses (2,699) (3,300)
Debt securities carried at fair value 299,566  
Fair Value   294,559
Less: Available-for-sale securities of business held for sale   (619)
Other Debt Securities, Carried at Fair Value:    
Amortized Cost 15,771 19,748
Gross Unrealized Gains 245 121
Gross Unrealized Losses (73) (149)
Fair Value 15,943 19,720
Debt securities carried at fair value:    
Amortized Cost 316,631 315,708
Gross Unrealized Gains 1,650 1,401
Gross Unrealized Losses (2,772) (3,449)
Debt securities carried at fair value 315,509 313,660
Held-to-maturity Securities:    
Amortized Cost 119,008 117,071
Gross Unrealized Gains 162 248
Gross Unrealized Losses (1,840) (2,034)
Held-to-maturity, fair value 117,330 115,285
Debt securities:    
Amortized Cost 435,639 432,779
Gross Unrealized Gains 1,812 1,649
Gross Unrealized Losses (4,612) (5,483)
Fair Value 432,839 428,945
Nonperforming Financing Receivable    
Available-for-sale Debt Securities:    
Debt securities carried at fair value 121 121
FNMA    
Debt securities carried at fair value:    
Amortized Cost 161,800 156,400
Debt securities carried at fair value 160,400 154,400
FHLMC    
Debt securities carried at fair value:    
Amortized Cost 46,500 48,700
Debt securities carried at fair value 46,300 48,300
Other assets    
Available-for-sale Equity Securities:    
Amortized Cost 8 325
Gross Unrealized Gains 69 51
Gross Unrealized Losses 0 (1)
Fair Value 77 375
Agency    
Available-for-sale Debt Securities:    
Amortized Cost 193,222 190,809
Gross Unrealized Gains 662 640
Gross Unrealized Losses (1,710) (1,963)
Debt securities carried at fair value 192,174 189,486
Debt securities carried at fair value:    
Debt securities carried at fair value 192,174  
Agency-collateralized mortgage obligations    
Available-for-sale Debt Securities:    
Amortized Cost 7,441 8,296
Gross Unrealized Gains 84 85
Gross Unrealized Losses (41) (51)
Debt securities carried at fair value 7,484 8,330
Other Debt Securities, Carried at Fair Value:    
Fair Value 5 5
Debt securities carried at fair value:    
Debt securities carried at fair value 7,489  
Commercial    
Available-for-sale Debt Securities:    
Amortized Cost 12,574 12,594
Gross Unrealized Gains 48 21
Gross Unrealized Losses (181) (293)
Debt securities carried at fair value 12,441 12,322
Debt securities carried at fair value:    
Debt securities carried at fair value 12,441  
Non-agency residential    
Available-for-sale Debt Securities:    
Amortized Cost 1,673 1,863
Gross Unrealized Gains 258 181
Gross Unrealized Losses (17) (31)
Debt securities carried at fair value 1,914 2,013
Other Debt Securities, Carried at Fair Value:    
Fair Value 3,037 $ 3,139
Debt securities carried at fair value:    
Debt securities carried at fair value $ 4,951  
Non-agency residential | Prime    
Available-for-sale Equity Securities:    
Available-for-sale securities, percent held by rating 60.00% 60.00%
Non-agency residential | Alt-A    
Available-for-sale Equity Securities:    
Available-for-sale securities, percent held by rating 20.00% 19.00%
Non-agency residential | Subprime    
Available-for-sale Equity Securities:    
Available-for-sale securities, percent held by rating 20.00% 21.00%
Mortgage-backed securities    
Available-for-sale Debt Securities:    
Amortized Cost $ 214,910 $ 213,562
Gross Unrealized Gains 1,052 927
Gross Unrealized Losses (1,949) (2,338)
Debt securities carried at fair value 214,013 212,151
Other Debt Securities, Carried at Fair Value:    
Fair Value 3,042 3,144
Debt securities carried at fair value:    
Debt securities carried at fair value 217,055  
U.S. Treasury and agency securities    
Available-for-sale Debt Securities:    
Amortized Cost 51,903 48,800
Gross Unrealized Gains 143 204
Gross Unrealized Losses (623) (752)
Debt securities carried at fair value 51,423 48,252
Debt securities carried at fair value:    
Debt securities carried at fair value 51,423  
Non-U.S. securities    
Available-for-sale Debt Securities:    
Amortized Cost 6,595  
Amortized Cost   6,372
Gross Unrealized Gains 9 13
Gross Unrealized Losses (2) (3)
Debt securities carried at fair value 6,602  
Fair Value   6,382
Other Debt Securities, Carried at Fair Value:    
Fair Value 12,665 16,336
Debt securities carried at fair value:    
Debt securities carried at fair value 19,267  
Other taxable securities, substantially all asset-backed securities    
Available-for-sale Debt Securities:    
Amortized Cost 8,976 10,573
Gross Unrealized Gains 80 64
Gross Unrealized Losses (5) (23)
Debt securities carried at fair value 9,051 10,614
Other Debt Securities, Carried at Fair Value:    
Fair Value 236 240
Debt securities carried at fair value:    
Debt securities carried at fair value 9,287  
Total taxable securities    
Available-for-sale Debt Securities:    
Amortized Cost 282,384  
Amortized Cost   279,307
Gross Unrealized Gains 1,284 1,208
Gross Unrealized Losses (2,579) (3,116)
Debt securities carried at fair value 281,089  
Fair Value   277,399
Debt securities carried at fair value:    
Debt securities carried at fair value 297,032  
Tax-exempt securities    
Available-for-sale Debt Securities:    
Amortized Cost 18,476 17,272
Gross Unrealized Gains 121 72
Gross Unrealized Losses (120) (184)
Debt securities carried at fair value 18,477 $ 17,160
Debt securities carried at fair value:    
Debt securities carried at fair value 18,477  
Debt securities    
Debt securities carried at fair value:    
Debt securities carried at fair value 315,509  
Available-for-sale Equity Securities:    
Shareholders’ equity (799)  
Accumulated other comprehensive income tax expense (benefit) $ (495)