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Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Other Assets [Line Items] |  |
Other | $ 478 | $ 400
Total | 4,591 | 4,682
Other Assets [Member] |  |
Other Assets [Line Items] |  |
Accrued interest receivable, net | 1,548 | 1,646
Derivatives at fair value | 930 | 678
Income tax asset, net current and deferred | 773 | 906
Benefit and insurance-related investments | 486 | 491
Fixed assets, net | 156 | 162
Accounts receivable | 104 | 329
Other loans, net | $ 116 | $ 70

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