Fair Value Election and Measurement Level 3 Significant Unobservable Input Assumptions (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
level 3 fair value assumptions [Line Items]
Trading assets	$ 4,848,000,000		$ 5,040,000,000
Available-for-sale Securities	23,302,000,000		22,542,000,000
Loans Held-for-sale, Fair Value Disclosure	1,233,000,000		1,378,000,000
Loans Receivable, Fair Value Disclosure	299,000,000		302,000,000
Servicing Asset at Fair Value, Amount	1,251,000,000		1,300,000,000
Other Liabilities, Fair Value Disclosure	26,000,000	[1]	29,000,000	[2],[3]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Trading assets	14,000,000		72,000,000
Available-for-sale Securities	900,000,000		953,000,000
Loans Held-for-sale, Fair Value Disclosure	2,000,000		3,000,000
Loans Receivable, Fair Value Disclosure	299,000,000		302,000,000
Servicing Asset at Fair Value, Amount	1,251,000,000		1,300,000,000
Other Liabilities, Fair Value Disclosure	26,000,000	[1]	29,000,000	[2],[3]
Fair Value, Measurements, Recurring [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Other Assets, Fair Value Disclosure	11,000,000		8,000,000
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
fair value inputs, loan production volume	0.00%		0.00%
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
fair value inputs, loan production volume	150.00%		150.00%
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
fair value inputs, loan production volume	92.00%		92.00%
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Income Approach Valuation Technique [Member] | Loan Production Volume [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Other Liabilities, Fair Value Disclosure	23,000,000	[4]	23,000,000	[5]
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Income Approach Valuation Technique [Member] | Revenue Run Rate [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Other Liabilities, Fair Value Disclosure	3,000,000	[4]	3,000,000	[5]
Fair Value, Measurements, Recurring [Member] | Equity Securities | Cost Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities	712,000,000		739,000,000
Fair Value, Measurements, Recurring [Member] | Collateralized Debt Obligations [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Trading assets			54,000,000
Fair Value, Measurements, Recurring [Member] | Collateralized Debt Obligations [Member] | Market Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, indicative pricing based on overcollateralization ratio			33,000,000
Fair Value Inputs, Estimated Collateral Losses			34.00%
Fair Value, Measurements, Recurring [Member] | Collateralized Debt Obligations [Member] | Market Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, indicative pricing based on overcollateralization ratio			45,000,000
Fair Value Inputs, Estimated Collateral Losses			45.00%
Fair Value, Measurements, Recurring [Member] | Collateralized Debt Obligations [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, indicative pricing based on overcollateralization ratio			40,000,000
Fair Value Inputs, Estimated Collateral Losses			39.00%
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Trading assets			6,000,000
Available-for-sale Securities	21,000,000		21,000,000
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Market Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Indicative Pricing			45,000,000
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Market Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Indicative Pricing			45,000,000
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Indicative Pricing			45,000,000
Fair Value, Measurements, Recurring [Member] | Other Debt Obligations [Member] | Cost Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities	5,000,000		5,000,000
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities	13,000,000		34,000,000
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Market Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Indicative Pricing	80,000,000		72,000,000
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Market Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Indicative Pricing	108,000,000		115,000,000
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Indicative Pricing	94,000,000		92,000,000
Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Available-for-sale Securities	149,000,000		154,000,000
Fair Value, Measurements, Recurring [Member] | Residential Mortgage, Loans Held For Sale [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Held-for-sale, Fair Value Disclosure	2,000,000		3,000,000
Fair Value, Measurements, Recurring [Member] | Residential Mortgage, Loans Held For Sale [Member] | Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Option Adjusted Spread	2.50%		0.00%
Fair Value Inputs, Conditional Prepayment Rate	2.00%		5.00%
Fair Value Inputs, Probability of Default	0.00%		0.00%
Fair Value, Measurements, Recurring [Member] | Residential Mortgage, Loans Held For Sale [Member] | Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Option Adjusted Spread	6.75%		6.22%
Fair Value Inputs, Conditional Prepayment Rate	11.00%		30.00%
Fair Value Inputs, Probability of Default	4.00%		20.00%
Fair Value, Measurements, Recurring [Member] | Residential Mortgage, Loans Held For Sale [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Option Adjusted Spread	3.60%		2.51%
Fair Value Inputs, Conditional Prepayment Rate	6.00%		15.00%
Fair Value Inputs, Probability of Default	1.00%		3.50%
Fair Value, Measurements, Recurring [Member] | Loans Held For Investment [Member] | Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Receivable, Fair Value Disclosure	9,000,000		10,000,000
Fair Value, Measurements, Recurring [Member] | Loans Held For Investment [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Loans Receivable, Fair Value Disclosure	290,000,000		292,000,000
Fair Value, Measurements, Recurring [Member] | Loans Held For Investment [Member] | Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Option Adjusted Spread	0.00%		0.00%
Fair Value Inputs, Conditional Prepayment Rate	1.00%		5.00%
Fair Value Inputs, Probability of Default	0.00%		0.00%
Fair Value, Measurements, Recurring [Member] | Loans Held For Investment [Member] | Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Option Adjusted Spread	6.75%		6.22%
Fair Value Inputs, Conditional Prepayment Rate	35.00%		30.00%
Fair Value Inputs, Probability of Default	8.00%		20.00%
Fair Value, Measurements, Recurring [Member] | Loans Held For Investment [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Option Adjusted Spread	3.01%		2.51%
Fair Value Inputs, Conditional Prepayment Rate	12.00%		15.00%
Fair Value Inputs, Probability of Default	3.00%		3.50%
Fair Value, Measurements, Recurring [Member] | Mortgage Servicing Rights [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Servicing Asset at Fair Value, Amount	$ 1,251,000,000		$ 1,300,000,000
Fair Value, Measurements, Recurring [Member] | Mortgage Servicing Rights [Member] | Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Conditional Prepayment Rate	5.00%		6.00%
Fair Value Inputs, Discount Rate	8.00%		9.00%
Fair Value, Measurements, Recurring [Member] | Mortgage Servicing Rights [Member] | Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Conditional Prepayment Rate	26.00%		31.00%
Fair Value Inputs, Discount Rate	28.00%		28.00%
Fair Value, Measurements, Recurring [Member] | Mortgage Servicing Rights [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Conditional Prepayment Rate	9.00%		16.00%
Fair Value Inputs, Discount Rate	12.00%		11.00%
Fair Value, Measurements, Recurring [Member] | Other Assets [Member] | Market Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Pull Through Rate	1.00%		9.00%
Fair Value Inputs, Msr Value	0.11%		0.06%
Fair Value, Measurements, Recurring [Member] | Other Assets [Member] | Market Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Pull Through Rate	99.00%		98.00%
Fair Value Inputs, Msr Value	2.33%		2.44%
Fair Value, Measurements, Recurring [Member] | Other Assets [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
level 3 fair value assumptions [Line Items]
Fair Value Inputs, Pull Through Rate	73.00%		71.00%
Fair Value Inputs, Msr Value	1.04%		1.04%

[1] Includes contingent consideration obligations related to acquisitions.

[2] Includes $336 million of FHLB of Atlanta stock, $402 million of Federal Reserve Bank stock, $103 million in mutual fund investments, and $1 million of other.

[3] Includes contingent consideration obligations related to acquisitions, as well as the derivative associated with the Company's sale of Visa shares during the year ended December 31, 2009.

[4] Input assumptions relate to the Company's contingent consideration obligations related to acquisitions. See Note 12, "Guarantees," for additional information.

[5] 3 Not meaningful.