Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Credit Extension Commitments Narrative (Details)

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Commitments and Contingencies - Credit Extension Commitments Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Other Commitments [Line Items]    
Legally binding unfunded commitments syndicated $ 13,700 $ 15,700
Carrying amount credit extension commitments syndicated 606 546
Deferred revenue 18 18
Other liabilities reserve for unfunded lending commitments 588 528
Notional amount of credit extension commitments under fair value option 8,100 9,900
Unfunded loan commitments    
Other Commitments [Line Items]    
Fair value carrying amount liabilities $ 392 $ 405