Derivative Financial Instruments Netting of Financial Instruments - Derivatives (parenthetical) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Derivative [Line Items]
Derivative Assets	$ 1,548	[1]	$ 2,083	[1]
Derivative Liabilities	595	[2]	412	[2]
Trading Account Assets [Member]
Derivative [Line Items]
Derivative Assets	1,400		1,900
Trading Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities	460		397
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Other Liabilities, Fair Value Disclosure	135	[3],[4]	15	[3],[4]
Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Trading Account Assets, Fair Value Disclosure	5,824		6,049
Trading Liabilities, Fair Value Disclosure	1,176		1,161
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Trading Account Assets, Fair Value Disclosure	6,354		6,779
Other Assets, Fair Value Disclosure	252	[3]	178	[3]
Trading Liabilities, Fair Value Disclosure	2,127		2,420
Other Liabilities, Fair Value Disclosure	164	[3],[4]	46	[3],[4]
Estimate of Fair Value, Fair Value Disclosure [Member] | Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Trading Account Assets, Fair Value Disclosure	1,977		2,635
Estimate of Fair Value, Fair Value Disclosure [Member] | Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member] | Other Assets [Member]
Derivative [Line Items]
Other Assets, Fair Value Disclosure	101
Netting [Member]
Derivative [Line Items]
Trading Account Assets, Fair Value Disclosure	530	[5]	730	[5]
Other Assets, Fair Value Disclosure	151	[5]
Trading Liabilities, Fair Value Disclosure	$ 951	[5]	$ 1,259	[6]

[1] At June 30, 2013, $1.4 billion, net of $530 million offsetting collateral, is recognized in trading assets and $101 million, net of $151 million offsetting collateral, is recognized in other assets within the Company's Consolidated Balance Sheets. At December 31, 2012, $1.9 billion, net of $730 million offsetting collateral, is recognized in trading assets and $178 million is recognized in other assets within the Company's Consolidated Balance Sheets.

[2] At June 30, 2013, $460 million, net of $1.0 billion offsetting collateral, is recognized in trading liabilities and $135 million is recognized in other liabilities within the Company's Consolidated Balance Sheets. At December 31, 2012, $397 million, net of $1.3 billion offsetting collateral, is recognized in trading liabilities and $15 million is recognized in other liabilities within the Company's Consolidated Balance Sheets.

[3] These amounts include IRLCs and derivative financial instruments entered into by the Mortgage segment to hedge its interest rate risk.

[4] These amounts include the derivative associated with the Company's sale of Visa shares during the year ended December 31, 2009, certain CDS, and contingent consideration obligations related to acquisitions.

[5] Amount represents the cash collateral received from or deposited with derivative counterparties. Amount is offset with derivatives in the Consolidated Balance Sheets at June 30, 2013.

[6] Amount represents the cash collateral received from or deposited with derivative counterparties. Amount is offset with derivatives in the Consolidated Balance Sheets at December 31, 2012.