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Commitments and Contingencies - Additional Information (Details)
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3 Months Ended | 9 Months Ended | 0 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
USD ($)
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Sep. 30, 2013
USD ($)
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Sep. 30, 2014
USD ($)
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Sep. 30, 2013
USD ($)
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Dec. 31, 2013
USD ($)
|
Sep. 30, 2014
Commercial Banks
USD ($)
|
Dec. 31, 2013
Commercial Banks
USD ($)
|
Sep. 30, 2014
Unconsolidated VIEs
USD ($)
|
Dec. 31, 2013
Unconsolidated VIEs
USD ($)
|
Sep. 30, 2014
Life Insurance Book Value Protection
USD ($)
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Dec. 31, 2013
Life Insurance Book Value Protection
USD ($)
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Sep. 30, 2014
Employee Retirement Protection
USD ($)
|
Dec. 31, 2013
Employee Retirement Protection
USD ($)
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Sep. 30, 2014
Other Guarantee
USD ($)
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Dec. 31, 2013
Other Guarantee
USD ($)
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Aug. 20, 2014
DoJ Settlement
USD ($)
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Aug. 20, 2014
DoJ Settlement
state
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Jul. 30, 2014
O'Donnell Litigation
USD ($)
|
Aug. 27, 2014
Takefuji Settlement
USD ($)
|
Aug. 27, 2014
Takefuji Settlement
JPY (¥)
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Apr. 30, 2010
Takefuji Settlement
USD ($)
|
Apr. 30, 2010
Takefuji Settlement
JPY (¥)
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Sep. 30, 2014
Unfunded Equity Investment Commitments
USD ($)
|
Dec. 31, 2013
Unfunded Equity Investment Commitments
USD ($)
|
Sep. 30, 2014
Loan Commitments
USD ($)
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Dec. 31, 2013
Loan Commitments
USD ($)
|
Sep. 30, 2014
Forward-Dated Resale and Securities Borrowing Agreements
USD ($)
|
Dec. 31, 2013
Forward-Dated Resale and Securities Borrowing Agreements
USD ($)
|
Sep. 30, 2014
Forward-Dated Repurchase and Securities Lending Agreements
USD ($)
|
Dec. 31, 2013
Forward-Dated Repurchase and Securities Lending Agreements
USD ($)
|
Sep. 30, 2014
Payment Protection Insurance
USD ($)
|
Sep. 30, 2013
Payment Protection Insurance
USD ($)
|
Sep. 30, 2014
Payment Protection Insurance
USD ($)
|
Sep. 30, 2013
Payment Protection Insurance
USD ($)
|
Dec. 31, 2013
Payment Protection Insurance
USD ($)
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Sep. 30, 2014
Merchant Servicing Joint Venture
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Oct. 15, 2014
Subsequent Event
Federal Home Loan Bank Settlement
trust
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Oct. 31, 2014
Subsequent Event
DoJ Settlement
USD ($)
|
Sep. 30, 2014
Merchant Processing Servicers, Sponsored Entities
USD ($)
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Sep. 30, 2013
Merchant Processing Servicers, Sponsored Entities
USD ($)
|
Sep. 30, 2014
Merchant Processing Servicers, Sponsored Entities
USD ($)
|
Sep. 30, 2013
Merchant Processing Servicers, Sponsored Entities
USD ($)
|
Dec. 31, 2013
Merchant Processing Servicers, Sponsored Entities
USD ($)
|
Sep. 30, 2014
Merchant Processing Servicers, Sponsored Entities
Merchant Services
USD ($)
|
Dec. 31, 2013
Merchant Processing Servicers, Sponsored Entities
Merchant Services
USD ($)
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| Loss Contingencies [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||
| Other commitments | $ 75,000,000 | $ 195,000,000 | $ 2,300,000,000 | $ 1,500,000,000 | $ 95,500,000,000 | $ 75,500,000,000 | $ 74,900,000,000 | $ 38,300,000,000 | |||||||||||||||||||||||||||||||||||||
| Operating Leases, Future Minimum Payments Due [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| 2014 | 702,000,000 | 702,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| 2015 | 2,500,000,000 | 2,500,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| 2016 | 2,200,000,000 | 2,200,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| 2017 | 1,800,000,000 | 1,800,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| 2018 | 1,400,000,000 | 1,400,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Thereafter | 6,200,000,000 | 6,200,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Notional amount of derivatives | 1,236,202,000,000 | 1,236,202,000,000 | 1,328,787,000,000 | 579,000,000 | 1,800,000,000 | 1,100,000,000 | 1,300,000,000 | 13,500,000,000 | 13,400,000,000 | 1,200,000,000 | 4,600,000,000 | ||||||||||||||||||||||||||||||||||
| Net fair value of bank-owned life insurance book value protection | 28,000,000 | 39,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Transactions processed and settled by sponsored entities | 162,700,000,000 | 154,700,000,000 | 476,400,000,000 | 460,900,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Losses as result of cardholder disputed transactions | 3,000,000 | 4,000,000 | 11,000,000 | 12,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Equity method investment ownership percentage | 49.00% | ||||||||||||||||||||||||||||||||||||||||||||
| Merchant escrow deposits held as collateral | 124,000,000 | 124,000,000 | 203,000,000 | ||||||||||||||||||||||||||||||||||||||||||
| Maximum potential exposure | 3,100,000,000 | 3,000,000,000 | 5,800,000,000 | 6,900,000,000 | 264,500,000,000 | 258,500,000,000 | |||||||||||||||||||||||||||||||||||||||
| Loss contingency accrual | 384,000,000 | 384,000,000 | 381,000,000 | ||||||||||||||||||||||||||||||||||||||||||
| Provision | 298,000,000 | 66,000,000 | 482,000,000 | 95,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Litigation expense | 6,000,000,000 | 1,100,000,000 | 16,000,000,000 | 3,800,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Minimum estimate range of possible loss | 0 | 0 | |||||||||||||||||||||||||||||||||||||||||||
| Maximum estimated range of possible loss | 3,100,000,000.0 | 3,100,000,000.0 | |||||||||||||||||||||||||||||||||||||||||||
| Number of trusts involved in settlement agreement | 2 | ||||||||||||||||||||||||||||||||||||||||||||
| Number of states involved in settlement | 6 | ||||||||||||||||||||||||||||||||||||||||||||
| Payments for legal settlements | 9,160,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Litigation settlement | 9,650,000,000 | 1,300,000,000 | 135,000,000 | 14,500,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Customer relief settlement | 7,000,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Civil monetary settlement | 5,020,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Compensatory remediation payments | 4,630,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Loss incurred by plaintiff | $ 270,000,000 | ¥ 29,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Litigation settlement interest rate | 5.00% | 5.00% | |||||||||||||||||||||||||||||||||||||||||||