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Other Assets - Schedule of Other Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Assets [Line Items]
Total	$ 7,287	$ 8,273
Total as a percentage of total other assets	100.00%	100.00%
Other Assets [Member]
Other Assets [Line Items]
Accrued interest receivable, net	2,161	2,147
Derivatives at fair value	1,624	2,241
Income tax asset, net current and deferred	1,299	1,478
Accounts receivable	881	1,111
Benefit and insurance-related investments	477	474
Fixed assets, net	237	215
Other loans, net	101	137
Other	$ 507	$ 470
Accrued interest receivable, net as a percentage of total other assets	30.00%	26.00%
Derivatives at fair value as a percentage of total other assets	22.00%	27.00%
Income tax asset, net current and deferred as a percentage of total other assets	18.00%	18.00%
Accounts receivable as a percentage of total other assets	12.00%	13.00%
Benefit and insurance-related investments as a percentage of total other assets	7.00%	6.00%
Fixed assets, net as a percentage of total other assets	3.00%	3.00%
Other loans, net as a percentage of total other assets	1.00%	2.00%
Other, as a percentage of total other assets	7.00%	5.00%

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Calculation of Accounts Receivable as a percentage of Other Assets at period end.

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The aggregate carrying amounts, as of the balance sheet date, of assets related to employee benefits and insurance-related investments.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of other loans not otherwise specified on our balance sheet. Excludes FFELP loans and Private Education Loans.

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For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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