U.S. Bancorp (USB) 10-Q 7 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'USB	'
Entity Registrant Name	'US BANCORP \DE\	'
Entity Central Index Key	'0000036104	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	1,815,149,853

Consolidated_Balance_Sheet_Una

Consolidated Balance Sheet (Unaudited) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Assets	'		'
Cash and due from banks	$7,408		$8,477
Investment securities	'		'
Held-to-maturity (fair value $40,389 and $38,368, respectively; including $498 and $994 at fair value pledged as collateral, respectively)	40,712	[1]	38,920	[1]
Available-for-sale ($154 and $1,106 pledged as collateral, respectively)	44,761	[1]	40,935	[1]
Loans held for sale (including $1,827 and $3,263 of mortgage loans carried at fair value, respectively)	1,843		3,268
Loans	'		'
Commercial	73,701		70,033
Commercial real estate	40,131		39,885
Residential mortgages	51,708		51,156
Credit Card	17,129		18,021
Other retail	47,607		47,678
Total loans, excluding covered loans	230,276		226,773
Covered loans	8,099		8,462
Total loans	238,375		235,235
Less allowance for loan losses	-4,189		-4,250
Net loans	234,186		230,985
Premises and equipment	2,589		2,606
Goodwill	9,204		9,205
Other intangible assets	3,422		3,529
Other assets (including $55 and $111 of trading securities at fair value pledged as collateral, respectively)	27,164	[1]	26,096	[1]
Total assets	371,289		364,021
Deposits	'		'
Noninterest-bearing	73,363		76,941
Interest-bearing	157,918		156,165
Time deposits greater than $100,000	29,331		29,017
Total deposits	260,612		262,123
Short-term borrowings	30,781		27,608
Long-term debt	23,774		20,049
Other liabilities	13,379		12,434
Total liabilities	328,546		322,214
Shareholders' equity	'		'
Preferred stock	4,756		4,756
Common stock, par value $0.01 a share-authorized: 4,000,000,000 shares; issued: 3/31/14 and 12/31/13-2,125,725,742 shares	21		21
Capital surplus	8,236		8,216
Retained earnings	39,584		38,667
Less cost of common stock in treasury: 3/31/14-304,447,591 shares; 12/31/13-300,977,274 shares	-9,693		-9,476
Accumulated other comprehensive income (loss)	-850		-1,071
Total U.S. Bancorp shareholders' equity	42,054		41,113
Noncontrolling interests	689		694
Total equity	42,743		41,807
Total liabilities and equity	$371,289		$364,021
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Consolidated_Balance_Sheet_Una1

Consolidated Balance Sheet (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Held-to-maturity securities, fair value	$40,389,000,000	$38,368,000,000
Securities, pledged as collateral	652,000,000	2,100,000,000
Mortgage loans, carried at fair value	1,827,000,000	3,263,000,000
Time deposits	100,000	100,000
Common stock, par value	$0.01	$0.01
Common stock, share-authorized (actual number of shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (actual number of shares)	2,125,725,742	2,125,725,742
Treasury stock, shares (actual number of shares)	304,447,591	300,977,274
Held-to-maturity Securities [Member]	'	'
Securities, pledged as collateral	498,000,000	994,000,000
Available-for-Sale Securities [Member]	'	'
Securities, pledged as collateral	154,000,000	1,106,000,000
Trading Securities [Member]	'	'
Securities, pledged as collateral	$55,000,000	$111,000,000

Consolidated_Statement_of_Inco

Consolidated Statement of Income (Unaudited) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest Income	'	'
Loans	$2,522	$2,562
Loans held for sale	27	72
Investment securities	441	410
Other interest income	32	67
Total interest income	3,022	3,111
Interest Expense	'	'
Deposits	119	155
Short-term borrowings	69	85
Long-term debt	184	218
Total interest expense	372	458
Net interest income	2,650	2,653
Provision for credit losses	306	403
Net interest income after provision for credit losses	2,344	2,250
Noninterest Income	'	'
Credit and debit card revenue	239	214
Corporate payment products revenue	173	172
Merchant processing services	356	347
ATM processing services	78	82
Trust and investment management fees	304	278
Deposit service charges	157	153
Treasury management fees	133	134
Commercial products revenue	205	200
Mortgage banking revenue	236	401
Investment products fees	46	41
Securities gains (losses), net	'	'
Realized gains (losses), net	5	12
Total other-than-temporary impairment	'	-1
Portion of other-than-temporary impairment recognized in other comprehensive income	'	-6
Total securities gains (losses), net	5	5
Other	176	138
Total noninterest income	2,108	2,165
Noninterest Expense	'	'
Compensation	1,115	1,082
Employee benefits	289	310
Net occupancy and equipment	249	235
Professional services	83	78
Marketing and business development	79	73
Technology and communications	211	211
Postage, printing and supplies	81	76
Other intangibles	49	57
Other	388	348
Total noninterest expense	2,544	2,470
Income before income taxes	1,908	1,945
Applicable income taxes	496	558
Net income	1,412	1,387
Net (income) loss attributable to noncontrolling interests	-15	41
Net income attributable to U.S. Bancorp	1,397	1,428
Net income applicable to U.S. Bancorp common shareholders	$1,331	$1,358
Earnings per common share	$0.73	$0.73
Diluted earnings per common share	$0.73	$0.73
Dividends declared per common share	$0.23	$0.20
Average common shares outstanding	1,818	1,858
Average diluted common shares outstanding	1,828	1,867

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'
Net income	$1,412	$1,387
Other Comprehensive Income (Loss)	'	'
Changes in unrealized gains and losses on securities available-for-sale	301	-120
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	6
Changes in unrealized gains and losses on derivative hedges	-11	-3
Foreign currency translation	-4	-10
Changes in unrealized gains and losses on retirement plans	'	-1
Reclassification to earnings of realized gains and losses	73	91
Income taxes related to other comprehensive income	-138	19
Total other comprehensive income (loss)	221	-18
Comprehensive income	1,633	1,369
Comprehensive (income) loss attributable to noncontrolling interests	-15	41
Comprehensive income attributable to U.S. Bancorp	$1,618	$1,410

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders' Equity (Unaudited) (USD $)	Total	Common Stock [Member]	Preferred Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total U.S. Bancorp Shareholders' Equity [Member]	Noncontrolling Interests [Member]
In Millions
Beginning Balance at Dec. 31, 2012	$40,267	$21	$4,769	$8,201	$34,720	($7,790)	($923)	$38,998	$1,269
Shares, Beginning Balance at Dec. 31, 2012	'	1,869	'	'	'	'	'	'	'
Net income (loss)	1,387	'	'	'	'	'	'	'	'
Net (income) loss attributable to noncontrolling interests	-41	'	'	'	'	'	'	'	-41
Net income attributable to U.S. Bancorp	1,428	'	'	'	1,428	'	'	1,428	'
Other comprehensive income (loss)	-18	'	'	'	'	'	-18	-18	'
Preferred stock dividends	-64	'	'	'	-64	'	'	-64	'
Common stock dividends	-364	'	'	'	-364	'	'	-364	'
Issuance of common and treasury stock	73	'	'	-115	'	188	'	73	'
Issuance of common and treasury stock, shares	'	6	'	'	'	'	'	'	'
Purchase of treasury stock	-574	'	'	'	'	-574	'	-574	'
Purchase of treasury stock, shares	'	-17	'	'	'	'	'	'	'
Distributions to noncontrolling interests	-15	'	'	'	'	'	'	'	-15
Net other changes in noncontrolling interests	103	'	'	'	'	'	'	'	103
Stock option and restricted stock grants	52	'	'	52	'	'	'	52	'
Ending Balance at Mar. 31, 2013	40,847	21	4,769	8,138	35,720	-8,176	-941	39,531	1,316
Shares, Ending Balance at Mar. 31, 2013	'	1,858	'	'	'	'	'	'	'
Beginning Balance at Dec. 31, 2013	41,807	21	4,756	8,216	38,667	-9,476	-1,071	41,113	694
Shares, Beginning Balance at Dec. 31, 2013	'	1,825	'	'	'	'	'	'	'
Net income (loss)	1,412	'	'	'	'	'	'	'	'
Net (income) loss attributable to noncontrolling interests	15	'	'	'	'	'	'	'	15
Net income attributable to U.S. Bancorp	1,397	'	'	'	1,397	'	'	1,397	'
Other comprehensive income (loss)	221	'	'	'	'	'	221	221	'
Preferred stock dividends	-60	'	'	'	-60	'	'	-60	'
Common stock dividends	-420	'	'	'	-420	'	'	-420	'
Issuance of common and treasury stock	245	'	'	-20	'	265	'	245	'
Issuance of common and treasury stock, shares	'	8	'	'	'	'	'	'	'
Purchase of treasury stock	-482	'	'	'	'	-482	'	-482	'
Purchase of treasury stock, shares	'	-12	'	'	'	'	'	'	'
Distributions to noncontrolling interests	-15	'	'	'	'	'	'	'	-15
Net other changes in noncontrolling interests	-5	'	'	'	'	'	'	'	-5
Stock option and restricted stock grants	40	'	'	40	'	'	'	40	'
Ending Balance at Mar. 31, 2014	$42,743	$21	$4,756	$8,236	$39,584	($9,693)	($850)	$42,054	$689
Shares, Ending Balance at Mar. 31, 2014	'	1,821	'	'	'	'	'	'	'

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating Activities	'	'
Net income attributable to U.S. Bancorp	$1,397	$1,428
Adjustments to reconcile net income to net cash provided by operating activities	'	'
Provision for credit losses	306	403
Depreciation and amortization of premises and equipment	74	74
Amortization of intangibles	49	57
Provision for deferred income taxes	-77	10
(Gain) loss on sale of loans held for sale	-174	-479
(Gain) loss on sale of securities and other assets	-24	5
Loans originated for sale in the secondary market, net of repayments	-5,419	-20,477
Proceeds from sales of loans held for sale	7,027	21,063
Other, net	-387	-416
Net cash provided by operating activities	2,772	1,668
Investing Activities	'	'
Proceeds from sales of available-for-sale investment securities	295	166
Proceeds from maturities of held-to-maturity investment securities	2,559	2,425
Proceeds from maturities of available-for-sale investment securities	1,230	3,203
Purchases of held-to-maturity investment securities	-4,369	-2,776
Purchases of available-for-sale investment securities	-5,062	-3,925
Net increase in loans outstanding	-3,146	-317
Proceeds from sales of loans	174	285
Purchases of loans	-548	-727
Other, net	222	142
Net cash used in investing activities	-8,645	-1,524
Financing Activities	'	'
Net decrease in deposits	-1,511	-1,171
Net increase in short-term borrowings	3,173	824
Proceeds from issuance of long-term debt	4,815	105
Principal payments or redemption of long-term debt	-994	-370
Proceeds from issuance of common stock	236	79
Repurchase of common stock	-433	-500
Cash dividends paid on preferred stock	-61	-64
Cash dividends paid on common stock	-421	-367
Net cash provided by (used in) financing activities	4,804	-1,464
Change in cash and due from banks	-1,069	-1,320
Cash and due from banks at beginning of period	8,477	8,252
Cash and due from banks at end of period	$7,408	$6,932

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Note 1	Basis of Presentation
	The accompanying consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States. In the opinion of management of U.S. Bancorp (the “Company”), all adjustments (consisting only of normal recurring adjustments) necessary for a fair statement of results for the interim periods have been made. These financial statements and notes should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. Certain amounts in prior periods have been reclassified to conform to the current presentation.
	Accounting policies for the lines of business are generally the same as those used in preparation of the consolidated financial statements with respect to activities specifically attributable to each business line. However, the preparation of business line results requires management to establish methodologies to allocate funding costs, expenses and other financial elements to each line of business. Table 10 “Line of Business Financial Performance” included in Management’s Discussion and Analysis provides details of segment results. This information is incorporated by reference into these Notes to Consolidated Financial Statements.

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2014
Investments Debt And Equity Securities [Abstract]	'
Investment Securities	'
	Note 2		Investment Securities
	The amortized cost, other-than-temporary impairment recorded in other comprehensive income (loss), gross unrealized holding gains and losses, and fair value of held-to-maturity and available-for-sale investment securities were as follows:
			March 31, 2014																				December 31, 2013
											Unrealized Losses																		Unrealized Losses
	(Dollars in Millions)		Amortized				Unrealized				Other-than-				Other (f)				Fair				Amortized				Unrealized		Other-than-			Other (f)			Fair
			Cost				Gains				Temporary(e)								Value				Cost				Gains		Temporary(e)						Value
	Held-to-maturity (a)
	U.S. Treasury and agencies		$	1,984			$	3			$	–			$	(59	)		$	1,928			$	3,114			$	5	$	–		$	(79	)	$	3,040
	Mortgage-backed securities
	Residential
	Agency			38,593				209				–				(476	)			38,326				35,671				187		–			(665	)		35,193
	Non-agency non-prime (d)			1				–				–				–				1				1				–		–			–			1
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–				9				–				–				9				–				9		–			–			9
	Other			15				4				(1	)			(1	)			17				16				4		(1	)		(1	)		18
	Obligations of state and political subdivisions			11				–				–				–				11				12				–		–			–			12
	Obligations of foreign governments			9				–				–				–				9				7				–		–			–			7
	Other debt securities			99				–				–				(11	)			88				99				–		–			(11	)		88
	Total held-to-maturity		$	40,712			$	225			$	(1	)		$	(547	)		$	40,389			$	38,920			$	205	$	(1	)	$	(756	)	$	38,368
	Available-for-sale (b)
	U.S. Treasury and agencies		$	1,104			$	4			$	–			$	(46	)		$	1,062			$	1,108			$	4	$	–		$	(67	)	$	1,045
	Mortgage-backed securities
	Residential
	Agency			35,426				498				–				(440	)			35,484				31,633				449		–			(529	)		31,553
	Non-agency
	Prime (c)			466				7				(5	)			(3	)			465				486				4		(8	)		(4	)		478
	Non-prime (d)			290				10				(3	)			–				297				297				5		(5	)		–			297
	Commercial agency			140				4				–				–				144				148				4		–			–			152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			19				5				–				–				24				20				4		–			–			24
	Other			615				13				–				–				628				616				13		–			–			629
	Obligations of state and political subdivisions			5,432				174				–				(21	)			5,585				5,673				116		–			(51	)		5,738
	Obligations of foreign governments			6				–				–				–				6				6				–		–			–			6
	Corporate debt securities			735				–				–				(65	)			670				734				–		–			(94	)		640
	Perpetual preferred securities			205				26				–				(13	)			218				205				24		–			(17	)		212
	Other investments			151				27				–				–				178				133				28		–			–			161
	Total available-for-sale		$	44,589			$	768			$	(8	)		$	(588	)		$	44,761			$	41,059			$	651	$	(13	)	$	(762	)	$	40,935
	(a)	Held-to-maturity investment securities are carried at historical cost or at fair value at the time of transfer from the available-for-sale to held-to-maturity category, adjusted for amortization of premiums and accretion of discounts and credit-related other-than-temporary impairment.
	(b)	Available-for-sale investment securities are carried at fair value with unrealized net gains or losses reported within accumulated other comprehensive income (loss) in shareholders’ equity.
	(c)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads). When the Company determines the designation, prime securities typically have a weighted average credit score of 725 or higher and a loan-to-value of 80 percent or lower; however, other pool characteristics may result in designations that deviate from these credit score and loan-to-value thresholds.
	(d)	Includes all securities not meeting the conditions to be designated as prime.
	(e)	Represents impairment not related to credit for those investment securities that have been determined to be other-than-temporarily impaired.
	(f)	Represents unrealized losses on investment securities that have not been determined to be other-than-temporarily impaired.
	The weighted-average maturity of the available-for-sale investment securities was 5.4 years at March 31, 2014, compared with 6.0 years at December 31, 2013. The corresponding weighted-average yields were 2.52 percent and 2.64 percent, respectively. The weighted-average maturity of the held-to-maturity investment securities was 4.5 years at March 31, 2014, and December 31, 2013. The corresponding weighted-average yields were 2.00 percent at March 31, 2014, and December 31, 2013.
	For amortized cost, fair value and yield by maturity date of held-to-maturity and available-for-sale investment securities outstanding at March 31, 2014, refer to Table 4 included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements.
	Investment securities with a fair value of $13.7 billion at March 31, 2014, and $17.3 billion at December 31, 2013, were pledged to secure public, private and trust deposits, repurchase agreements and for other purposes required by contractual obligation or law. Included in these amounts were securities where the Company and certain counterparties have agreements granting the counterparties the right to sell or pledge the securities. Investment securities delivered under these types of arrangements had a fair value of $652 million at March 31, 2014, and $2.1 billion at December 31, 2013.
	The following table provides information about the amount of interest income from taxable and non-taxable investment securities:
	Three Months Ended March 31		2014				2013
	(Dollars in Millions)
	Taxable		$	381			$	344
	Non-taxable			60				66
	Total interest income from investment securities		$	441			$	410
	The following table provides information about the amount of gross gains and losses realized through the sales of available-for-sale investment securities:
	Three Months Ended March 31		2014				2013
	(Dollars in Millions)
	Realized gains		$	5			$	12
	Realized losses			–				–
	Net realized gains (losses)		$	5			$	12
	Income tax (benefit) on net realized gains (losses)		$	2			$	5
	The Company conducts a regular assessment of its investment securities with unrealized losses to determine whether investment securities are other-than-temporarily impaired considering, among other factors, the nature of the investment securities, credit ratings or financial condition of the issuer, the extent and duration of the unrealized loss, expected cash flows of underlying collateral, the existence of any government or agency guarantees, market conditions and whether the Company intends to sell or it is more likely than not the Company will be required to sell the investment securities.
	The following table summarizes other-than-temporary impairment by investment category:
					2014												2013
	Three Months Ended March 31				Losses				Other Gains				Total				Losses				Other Gains				Total
(Dollars in Millions)	Recorded in				(Losses) (c)				Recorded in								(Losses) (c)
	Earnings								Earnings
Available-for-sale
Mortgage-backed securities
Non-agency residential
Prime (a)				$	–			$	–			$	–			$	(1	)		$	1			$	–
Non-prime (b)					–				–				–				(6	)			5				(1	)
Total available-for-sale				$	–			$	–			$	–			$	(7	)		$	6			$	(1	)
(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
(b)	Includes all securities not meeting the conditions to be designated as prime.
(c)	Losses represent the non-credit portion of other-than-temporary impairment recorded in other comprehensive income (loss) for investment securities determined to be other-than-temporarily impaired during the period. Gains represent recoveries in the fair value of securities that had non-credit other-than-temporary impairment during the period.
The Company determined the other-than-temporary impairment recorded in earnings for debt securities not intended to be sold by estimating the future cash flows of each individual investment security, using market information where available, and discounting the cash flows at the original effective rate of the investment security. Other-than-temporary impairment recorded in other comprehensive income (loss) was measured as the difference between that discounted amount and the fair value of each investment security.
The following table includes the ranges for significant assumptions used for those available-for-sale non-agency mortgage-backed securities determined to be other-than-temporarily impaired during the three months ended March 31, 2014:
		Prime (a)
		Minimum				Maximum				Average
Estimated lifetime prepayment rates			20	%			20	%			20	%
Lifetime probability of default rates			5				5				5
Lifetime loss severity rates			45				45				45
(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
Changes in the credit losses on debt securities are summarized as follows:
Three Months Ended March 31		2014				2013
(Dollars in Millions)
Balance at beginning of period		$	116			$	134
Additions to Credit Losses Due to Other-than-temporary Impairments
Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized			–				7
Total other-than-temporary impairment on debt securities			–				7
Other Changes in Credit Losses
Increases in expected cash flows			(2	)			–
Realized losses (a)			(3	)			(8	)
Balance at end of period		$	111			$	133
(a)	Primarily represents principal losses allocated to mortgage and asset-backed securities in the Company’s portfolio under the terms of the securitization transaction documents.
At March 31, 2014, certain investment securities had a fair value below amortized cost. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at March 31, 2014:
		Less Than 12 Months								12 Months or Greater								Total
(Dollars in Millions)		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
		Value				Losses				Value				Losses				Value				Losses
Held-to-maturity
U.S. Treasury and agencies		$	1,012			$	(59	)		$	–			$	–			$	1,012			$	(59	)
Residential agency mortgage-backed securities			22,447				(432	)			1,202				(44	)			23,649				(476	)
Other asset-backed securities			–				–				10				(2	)			10				(2	)
Obligations of state and political subdivisions			3				–				–				–				3				–
Other debt securities			–				–				12				(11	)			12				(11	)
Total held-to-maturity		$	23,462			$	(491	)		$	1,224			$	(57	)		$	24,686			$	(548	)
Available-for-sale
U.S. Treasury and agencies		$	845			$	(41	)		$	95			$	(5	)		$	940			$	(46	)
Mortgage-backed securities
Residential
Agency			14,566				(323	)			2,580				(117	)			17,146				(440	)
Non-agency (a)
Prime (b)			47				(1	)			175				(7	)			222				(8	)
Non-prime (c)			33				–				44				(3	)			77				(3	)
Other asset-backed securities			23				–				3				–				26				–
Obligations of state and political subdivisions			441				(17	)			81				(4	)			522				(21	)
Obligations of foreign governments			6				–				–				–				6				–
Corporate debt securities			50				–				442				(65	)			492				(65	)
Perpetual preferred securities			–				–				120				(13	)			120				(13	)
Total available-for-sale		$	16,011			$	(382	)		$	3,540			$	(214	)		$	19,551			$	(596	)
(a)	The Company has $11 million of unrealized losses on residential non-agency mortgage-backed securities. Credit-related other-than-temporary impairment on these securities may occur if there is further deterioration in the underlying collateral pool performance. Borrower defaults may increase if economic conditions worsen. Additionally, deterioration in home prices may increase the severity of projected losses.
(b)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
(c)	Includes all securities not meeting the conditions to be designated as prime.
The Company does not consider these unrealized losses to be credit-related. These unrealized losses primarily relate to changes in interest rates and market spreads subsequent to purchase. A substantial portion of investment securities that have unrealized losses are either corporate debt issued with high investment grade credit ratings or agency mortgage-backed securities. In general, the issuers of the investment securities are contractually prohibited from prepayment at less than par, and the Company did not pay significant purchase premiums for these investment securities. At March 31, 2014, the Company had no plans to sell investment securities with unrealized losses, and believes it is more likely than not it would not be required to sell such investment securities before recovery of their amortized cost.

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
Loans and Allowance for Credit Losses	'
	Note 3		Loans and Allowance for Credit Losses
	The composition of the loan portfolio, disaggregated by class and underlying specific portfolio type, was as follows:
			March 31, 2014						December 31, 2013
	(Dollars in Millions)		Amount			Percent			Amount			Percent
						of Total						of Total
	Commercial
	Commercial		$	68,556			28.8	%	$	64,762			27.5	%
	Lease financing			5,145			2.1			5,271			2.3
	Total commercial			73,701			30.9			70,033			29.8
	Commercial Real Estate
	Commercial mortgages			31,878			13.4			32,183			13.7
	Construction and development			8,253			3.4			7,702			3.3
	Total commercial real estate			40,131			16.8			39,885			17
	Residential Mortgages
	Residential mortgages			38,316			16.1			37,545			15.9
	Home equity loans, first liens			13,392			5.6			13,611			5.8
	Total residential mortgages			51,708			21.7			51,156			21.7
	Credit Card			17,129			7.2			18,021			7.7
	Other Retail
	Retail leasing			6,009			2.5			5,929			2.5
	Home equity and second mortgages			15,261			6.4			15,442			6.6
	Revolving credit			3,187			1.3			3,276			1.4
	Installment			5,751			2.4			5,709			2.4
	Automobile			13,933			5.9			13,743			5.8
	Student			3,466			1.5			3,579			1.5
	Total other retail			47,607			20			47,678			20.2
	Total loans, excluding covered loans			230,276			96.6			226,773			96.4
	Covered Loans			8,099			3.4			8,462			3.6
	Total loans		$	238,375			100	%	$	235,235			100	%
	The Company had loans of $76.8 billion at March 31, 2014, and $77.2 billion at December 31, 2013, pledged at the Federal Home Loan Bank (“FHLB”), and loans of $56.7 billion at March 31, 2014, and $53.0 billion at December 31, 2013, pledged at the Federal Reserve Bank.
	Originated loans are reported at the principal amount outstanding, net of unearned interest and deferred fees and costs. Net unearned interest and deferred fees and costs amounted to $584 million at March 31, 2014, and $556 million at December 31, 2013. All purchased loans and related indemnification assets are recorded at fair value at the date of purchase. The Company evaluates purchased loans for impairment at the date of purchase in accordance with applicable authoritative accounting guidance. Purchased loans with evidence of credit deterioration since origination for which it is probable that all contractually required payments will not be collected are considered “purchased impaired loans.” All other purchased loans are considered “purchased nonimpaired loans.”
	Changes in the accretable balance for purchased impaired loans were as follows:
	Three Months Ended March 31		2014			2013
	(Dollars in Millions)
	Balance at beginning of period		$	1,655		$	1,709
	Accretion			(111	)		(136	)
	Disposals			(40	)		(38	)
	Reclassifications from nonaccretable difference (a)			81			10
	Other (b)			(1	)		376
	Balance at end of period		$	1,584		$	1,921
	(a)	Primarily relates to changes in expected credit performance.
	(b)	The amount in first quarter 2013 primarily represents the reclassification of unamortized decreases in the FDIC asset (which are presented as a separate component within the covered assets table on page 52 beginning in 2013), partially offset by the impact of changes in expectations about retaining covered single-family loans beyond the term of the indemnification agreements.
	Allowance for Credit Losses The allowance for credit losses reserves for probable and estimable losses incurred in the Company’s loan and lease portfolio, including unfunded credit commitments, and includes certain amounts that do not represent loss exposure to the Company because those losses are recoverable under loss sharing agreements with the Federal Deposit Insurance Corporation (“FDIC”). The allowance for credit losses is increased through provisions charged to operating earnings and reduced by net charge-offs. Management evaluates the allowance each quarter to ensure it appropriately reserves for incurred losses.
	The allowance recorded for loans in the commercial lending segment is based on reviews of individual credit relationships and considers the migration analysis of commercial lending segment loans and actual loss experience. In the migration analysis applied to risk rated loan portfolios, the Company currently examines up to a 13-year period of loss experience. For each loan type, this historical loss experience is adjusted as necessary to consider any relevant changes in portfolio composition, lending policies, underwriting standards, risk management practices or economic conditions. The results of the analysis are evaluated quarterly to confirm an appropriate historical time frame is selected for each commercial loan type. The allowance recorded for impaired loans greater than $5 million in the commercial lending segment is based on an individual loan analysis utilizing expected cash flows discounted using the original effective interest rate, the observable market price of the loan, or the fair value of the collateral for collateral-dependent loans, rather than the migration analysis. The allowance recorded for all other commercial lending segment loans is determined on a homogenous pool basis and includes consideration of product mix, risk characteristics of the portfolio, bankruptcy experience, portfolio growth and historical losses, adjusted for current trends. The Company also considers the impacts of any loan modifications made to commercial lending segment loans and any subsequent payment defaults to its expectations of cash flows, principal balance, and current expectations about the borrower’s ability to pay in determining the allowance for credit losses.
	The allowance recorded for Troubled Debt Restructuring (“TDR”) loans and purchased impaired loans in the consumer lending segment is determined on a homogenous pool basis utilizing expected cash flows discounted using the original effective interest rate of the pool, or the prior quarter effective rate, respectively. The allowance for collateral-dependent loans in the consumer lending segment is determined based on the fair value of the collateral less costs to sell. The allowance recorded for all other consumer lending segment loans is determined on a homogenous pool basis and includes consideration of product mix, risk characteristics of the portfolio, bankruptcy experience, delinquency status, refreshed loan-to-value ratios when possible, portfolio growth and historical losses, adjusted for current trends. The Company also considers any modifications made to consumer lending segment loans including the impacts of any subsequent payment defaults since modification in determining the allowance for credit losses, such as the borrower’s ability to pay under the restructured terms, and the timing and amount of payments.
	The allowance for the covered loan segment is evaluated each quarter in a manner similar to that described for non-covered loans and represents any decreases in expected cash flows of those loans after the acquisition date. The provision for credit losses for covered loans considers the indemnification provided by the FDIC.
	In addition, subsequent payment defaults on loan modifications considered TDRs are considered in the underlying factors used in the determination of the appropriateness of the allowance for credit losses. For each loan segment, the Company estimates future loan charge-offs through a variety of analysis, trends and underlying assumptions. With respect to the commercial lending segment, TDRs may be collectively evaluated for impairment where observed performance history, including defaults, is a primary driver of the loss allocation. For commercial TDRs individually evaluated for impairment, attributes of the borrower are the primary factors in determining the allowance for credit losses. However, incorporation of loss history is factored into the allowance methodology applied to this category of loans. With respect to the consumer lending segment, performance of the portfolio, including defaults on TDRs, is considered when estimating future cash flows.
	The Company’s methodology for determining the appropriate allowance for credit losses for all the loan segments also considers the imprecision inherent in the methodologies used. As a result, in addition to the amounts determined under the methodologies described above, management also considers the potential impact of other qualitative factors which include, but are not limited to, economic factors; geographic and other concentration risks; delinquency and nonaccrual trends; current business conditions; changes in lending policy, underwriting standards, internal review and other relevant business practices; and the regulatory environment. The consideration of these items results in adjustments to allowance amounts included in the Company’s allowance for credit losses for each of the above loan segments.
	The Company also assesses the credit risk associated with off-balance sheet loan commitments, letters of credit, and derivatives. Credit risk associated with derivatives is reflected in the fair values recorded for those positions. The liability for off-balance sheet credit exposure related to loan commitments and other credit guarantees is included in other liabilities. Because business processes and credit risks associated with unfunded credit commitments are essentially the same as for loans, the Company utilizes similar processes to estimate its liability for unfunded credit commitments.
	Activity in the allowance for credit losses by portfolio class was as follows:
	(Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
						Real Estate			Mortgages			Card			Retail			Excluding			Loans			Loans
																		Covered
																		Loans
	Balance at December 31, 2012		$	1,051		$	857		$	935		$	863		$	848		$	4,554		$	179		$	4,733
	Add
	Provision for credit losses			(4	)		(40	)		83			192			132			363			40			403
	Deduct
	Loans charged off			56			43			100			193			156			548			1			549
	Less recoveries of loans charged off			(21	)		(24	)		(8	)		(33	)		(30	)		(116	)		–			(116	)
	Net loans charged off			35			19			92			160			126			432			1			433
	Other changes (a)			–			–			–			–			–			–			5			5
	Balance at March 31, 2013		$	1,012		$	798		$	926		$	895		$	854		$	4,485		$	223		$	4,708
Balance at December 31, 2013		$	1,075		$	776		$	875		$	884		$	781		$	4,391		$	146		$	4,537
Add
Provision for credit losses			52			(37	)		44			170			80			309			(3	)		306
Deduct
Loans charged off			63			8			61			184			100			416			6			422
Less recoveries of loans charged off			(27	)		(11	)		(4	)		(14	)		(24	)		(80	)		(1	)		(81	)
Net loans charged off			36			(3	)		57			170			76			336			5			341
Other changes (a)			–			–			–			–			–			–			(5	)		(5	)
Balance at March 31, 2014		$	1,091		$	742		$	862		$	884		$	785		$	4,364		$	133		$	4,497
(a)	Includes net changes in credit losses to be reimbursed by the FDIC and reductions in the allowance for covered loans where the reversal of a previously recorded allowance was offset by an associated decrease in the indemnification asset.
Additional detail of the allowance for credit losses by portfolio class was as follows:
(Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
					Real Estate			Mortgages			Card			Retail			Excluding			Loans			Loans
																	Covered
																	Loans
Allowance Balance at March 31, 2014 Related to
Loans individually evaluated for impairment (a)		$	19		$	12		$	–		$	–		$	–		$	31		$	–		$	31
TDRs collectively evaluated for impairment			15			20			333			77			51			496			4			500
Other loans collectively evaluated for impairment			1,057			674			529			807			734			3,801			1			3,802
Loans acquired with deteriorated credit quality			–			36			–			–			–			36			128			164
Total allowance for credit losses		$	1,091		$	742		$	862		$	884		$	785		$	4,364		$	133		$	4,497
Allowance Balance at December 31, 2013 Related to
Loans individually evaluated for impairment (a)		$	15		$	17		$	–		$	–		$	–		$	32		$	–		$	32
TDRs collectively evaluated for impairment			19			26			329			87			55			516			4			520
Other loans collectively evaluated for impairment			1,041			700			546			797			726			3,810			5			3,815
Loans acquired with deteriorated credit quality			–			33			–			–			–			33			137			170
Total allowance for credit losses		$	1,075		$	776		$	875		$	884		$	781		$	4,391		$	146		$	4,537
(a)	Represents the allowance for credit losses related to loans greater than $5 million classified as nonperforming or TDRs.
Additional detail of loan balances by portfolio class was as follows:
(Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
					Real Estate			Mortgages			Card			Retail			Excluding			Loans (b)			Loans
																	Covered
																	Loans
March 31, 2014
Loans individually evaluated for impairment (a)		$	282		$	214		$	–		$	–		$	–		$	496		$	82		$	578
TDRs collectively evaluated for impairment			136			327			5,142			289			263			6,157			92			6,249
Other loans collectively evaluated for impairment			73,281			39,452			46,565			16,840			47,344			223,482			4,288			227,770
Loans acquired with deteriorated credit quality			2			138			1			–			–			141			3,637			3,778
Total loans		$	73,701		$	40,131		$	51,708		$	17,129		$	47,607		$	230,276		$	8,099		$	238,375
December 31, 2013
Loans individually evaluated for impairment (a)		$	197		$	237		$	–		$	–		$	–		$	434		$	62		$	496
TDRs collectively evaluated for impairment			155			358			5,064			310			269			6,156			87			6,243
Other loans collectively evaluated for impairment			69,680			39,129			46,090			17,711			47,409			220,019			4,538			224,557
Loans acquired with deteriorated credit quality			1			161			2			–			–			164			3,775			3,939
Total loans		$	70,033		$	39,885		$	51,156		$	18,021		$	47,678		$	226,773		$	8,462		$	235,235
(a)	Represents loans greater than $5 million classified as nonperforming or TDRs.
(b)	Includes expected reimbursements from the FDIC under loss sharing agreements.
Credit Quality The quality of the Company’s loan portfolios is assessed as a function of net credit losses, levels of nonperforming assets and delinquencies, and credit quality ratings as defined by the Company.
For all loan classes, loans are considered past due based on the number of days delinquent except for monthly amortizing loans which are classified delinquent based upon the number of contractually required payments not made (for example, two missed payments is considered 30 days delinquent). When a loan is placed on nonaccrual status, unpaid accrued interest is reversed.
Commercial lending segment loans are generally placed on nonaccrual status when the collection of principal and interest has become 90 days past due or is otherwise considered doubtful. Commercial lending segment loans are generally fully or partially charged down to the fair value of the collateral securing the loan, less costs to sell, when the loan is considered uncollectible.
Consumer lending segment loans are generally charged-off at a specific number of days or payments past due. Residential mortgages and other retail loans secured by 1-4 family properties are generally charged down to the fair value of the collateral securing the loan, less costs to sell, at 180 days past due, and placed on nonaccrual status in instances where a partial charge-off occurs unless the loan is well secured and in the process of collection. Loans and lines in a junior lien position secured by 1-4 family properties are placed on nonaccrual status at 120 days past due or when behind a first lien that has become 180 days or greater past due or placed on nonaccrual status. Any secured consumer lending segment loan whose borrower has had debt discharged through bankruptcy, for which the loan amount exceeds the fair value of the collateral, is charged down to the fair value of the related collateral and the remaining balance is placed on nonaccrual status. Credit card loans continue to accrue interest until the account is charged off. Credit cards are charged off at 180 days past due. Other retail loans not secured by 1-4 family properties are charged-off at 120 days past due; and revolving consumer lines are charged off at 180 days past due. Similar to credit cards, other retail loans are generally not placed on nonaccrual status because of the relative short period of time to charge-off. Certain retail customers having financial difficulties may have the terms of their credit card and other loan agreements modified to require only principal payments and, as such, are reported as nonaccrual.
For all loan classes, interest payments received on nonaccrual loans are generally recorded as a reduction to the loan carrying amount. Interest payments are generally recorded as reductions to a loan’s carrying amount while a loan is on nonaccrual and are recognized as interest income upon payoff of the loan. Interest income may be recognized for interest payments if the remaining carrying amount of the loan is believed to be collectible. In certain circumstances, loans in any class may be restored to accrual status, such as when a loan has demonstrated sustained repayment performance or no amounts are past due and prospects for future payment are no longer in doubt; or the loan becomes well secured and is in the process of collection. Loans where there has been a partial charge-off may be returned to accrual status if all principal and interest (including amounts previously charged-off) is expected to be collected and the loan is current.
Covered loans not considered to be purchased impaired are evaluated for delinquency, nonaccrual status and charge-off consistent with the class of loan they would be included in had the loss share coverage not been in place. Generally, purchased impaired loans are considered accruing loans. However, the timing and amount of future cash flows for some loans is not reasonably estimable. Those loans are classified as nonaccrual loans and interest income is not recognized until the timing and amount of the future cash flows can be reasonably estimated.
The following table provides a summary of loans by portfolio class, including the delinquency status of those that continue to accrue interest, and those that are nonperforming:
		Accruing
(Dollars in Millions)		Current			30-89 Days			90 Days or			Nonperforming			Total
					Past Due			More Past Due
March 31, 2014
Commercial		$	73,257		$	210		$	46		$	188		$	73,701
Commercial real estate			39,780			58			24			269			40,131
Residential mortgages (a)			50,294			306			331			777			51,708
Credit card			16,653			203			208			65			17,129
Other retail			47,131			202			86			188			47,607
Total loans, excluding covered loans			227,115			979			695			1,487			230,276
Covered loans			7,339			156			472			132			8,099
Total loans		$	234,454		$	1,135		$	1,167		$	1,619		$	238,375
December 31, 2013
Commercial		$	69,587		$	257		$	55		$	134		$	70,033
Commercial real estate			39,459			94			29			303			39,885
Residential mortgages (a)			49,695			358			333			770			51,156
Credit card			17,507			226			210			78			18,021
Other retail			47,156			245			86			191			47,678
Total loans, excluding covered loans			223,404			1,180			713			1,476			226,773
Covered loans			7,693			166			476			127			8,462
Total loans		$	231,097		$	1,346		$	1,189		$	1,603		$	235,235
(a)	At March 31, 2014, $417 million of loans 30–89 days past due and $3.6 billion of loans 90 days or more past due purchased from Government National Mortgage Association (“GNMA”) mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified as current, compared with $440 million and $3.7 billion at December 31, 2013, respectively.
At March 31, 2014, the amount of foreclosed residential real estate held by the Company, and included in other real estate owned was $283 million ($250 million excluding covered assets). This excludes $540 million of foreclosed residential real estate related to mortgage loans whose payments are primarily insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. In addition, the amount of residential mortgage loans secured by residential real estate in the process of foreclosure at March 31, 2014, was $3.4 billion, of which $2.4 billion related to loans purchased from Government National Mortgage Association (“GNMA”) mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs.
The Company classifies its loan portfolios using internal credit quality ratings on a quarterly basis. These ratings include: pass, special mention and classified, and are an important part of the Company’s overall credit risk management process and evaluation of the allowance for credit losses. Loans with a pass rating represent those not classified on the Company’s rating scale for problem credits, as minimal credit risk has been identified. Special mention loans are those that have a potential weakness deserving management’s close attention. Classified loans are those where a well-defined weakness has been identified that may put full collection of contractual cash flows at risk. It is possible that others, given the same information, may reach different reasonable conclusions regarding the credit quality rating classification of specific loans.
The following table provides a summary of loans by portfolio class and the Company’s internal credit quality rating:
					Criticized
(Dollars in Millions)		Pass			Special			Classified (a)			Total			Total
					Mention						Criticized
March 31, 2014
Commercial		$	71,544		$	1,111		$	1,046		$	2,157		$	73,701
Commercial real estate			38,520			538			1,073			1,611			40,131
Residential mortgages (b)			50,521			4			1,183			1,187			51,708
Credit card			16,856			–			273			273			17,129
Other retail			47,228			24			355			379			47,607
Total loans, excluding covered loans			224,669			1,677			3,930			5,607			230,276
Covered loans			7,812			6			281			287			8,099
Total loans		$	232,481		$	1,683		$	4,211		$	5,894		$	238,375
Total outstanding commitments		$	476,506		$	2,871		$	5,086		$	7,957		$	484,463
December 31, 2013
Commercial		$	68,075		$	1,013		$	945		$	1,958		$	70,033
Commercial real estate			38,113			616			1,156			1,772			39,885
Residential mortgages (b)			50,152			5			999			1,004			51,156
Credit card			17,733			–			288			288			18,021
Other retail			47,313			27			338			365			47,678
Total loans, excluding covered loans			221,386			1,661			3,726			5,387			226,773
Covered loans			8,160			18			284			302			8,462
Total loans		$	229,546		$	1,679		$	4,010		$	5,689		$	235,235
Total outstanding commitments		$	470,046		$	2,939		$	4,812		$	7,751		$	477,797
(a)	Classified rating on consumer loans primarily based on delinquency status.
(b)	At March 31, 2014, $3.6 billion of GNMA loans 90 days or more past due and $2.7 billion of restructured GNMA loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs were classified with a pass rating, compared with $3.7 billion and $2.6 billion at December 31, 2013, respectively.
For all loan classes, a loan is considered to be impaired when, based on current events or information, it is probable the Company will be unable to collect all amounts due per the contractual terms of the loan agreement. Impaired loans include all nonaccrual and TDR loans. For all loan classes, interest income on TDR loans is recognized under the modified terms and conditions if the borrower has demonstrated repayment performance at a level commensurate with the modified terms over several payment cycles. Interest income is generally not recognized on other impaired loans until the loan is paid off. However, interest income may be recognized for interest payments if the remaining carrying amount of the loan is believed to be collectible.
Factors used by the Company in determining whether all principal and interest payments due on commercial and commercial real estate loans will be collected and therefore whether those loans are impaired include, but are not limited to, the financial condition of the borrower, collateral and/or guarantees on the loan, and the borrower’s estimated future ability to pay based on industry, geographic location and certain financial ratios. The evaluation of impairment on residential mortgages, credit card loans and other retail loans is primarily driven by delinquency status of individual loans or whether a loan has been modified, and considers any government guarantee where applicable. Individual covered loans, whose future losses are covered by loss sharing agreements with the FDIC that substantially reduce the risk of credit losses to the Company, are evaluated for impairment and accounted for in a manner consistent with the class of loan they would have been included in had the loss sharing coverage not been in place.
A summary of impaired loans by portfolio class was as follows:
(Dollars in Millions)		Period-end			Unpaid			Valuation			Commitments
		Recorded			Principal			Allowance			to Lend
		Investment (a)			Balance						Additional
											Funds
March 31, 2014
Commercial		$	452		$	879		$	35		$	37
Commercial real estate			628			1,218			39			49
Residential mortgages			2,739			3,645			297			–
Credit card			289			289			77			–
Other retail			385			433			55			4
Total impaired loans, excluding GNMA and covered loans			4,493			6,464			503			90
Loans purchased from GNMA mortgage pools			2,716			2,716			40			–
Covered loans			419			920			22			3
Total		$	7,628		$	10,100		$	565		$	93
December 31, 2013
Commercial		$	382		$	804		$	36		$	54
Commercial real estate			693			1,322			51			40
Residential mortgages			2,767			3,492			308			–
Credit card			310			310			87			–
Other retail			391			593			59			14
Total impaired loans, excluding GNMA and covered loans			4,543			6,521			541			108
Loans purchased from GNMA mortgage pools			2,607			2,607			28			–
Covered loans			452			1,008			30			4
Total		$	7,602		$	10,136		$	599		$	112
(a)	Substantially all loans classified as impaired at March 31, 2014 and December 31, 2013, had an associated allowance for credit losses.
Additional information on impaired loans follows:
		2014						2013
Three Months Ended March 31		Average			Interest			Average			Interest
(Dollars in Millions)		Recorded			Income			Recorded			Income
		Investment			Recognized			Investment			Recognized
Commercial		$	417		$	2		$	391		$	10
Commercial real estate			660			9			1,055			11
Residential mortgages			2,753			35			2,728			34
Credit card			300			3			418			4
Other retail			388			4			443			6
Total impaired loans, excluding GNMA and covered loans			4,518			53			5,035			65
Loans purchased from GNMA mortgage pools			2,662			33			1,844			23
Covered loans			435			5			681			7
Total		$	7,615		$	91		$	7,560		$	95
Troubled Debt Restructurings In certain circumstances, the Company may modify the terms of a loan to maximize the collection of amounts due when a borrower is experiencing financial difficulties or is expected to experience difficulties in the near-term. Concessionary modifications are classified as TDRs unless the modification results in only an insignificant delay in payments to be received. The Company recognizes interest on TDRs if the borrower complies with the revised terms and conditions as agreed upon with the Company and has demonstrated repayment performance at a level commensurate with the modified terms over several payment cycles. To the extent a previous restructuring was insignificant, the Company considers the cumulative effect of past restructurings related to the receivable when determining whether a current restructuring is a TDR. Loans classified as TDRs are considered impaired loans for reporting and measurement purposes.
The following table provides a summary of loans modified as TDRs during the periods presented by portfolio class:
		2014									2013
Three Months Ended March 31		Number			Pre-Modification			Post-Modification			Number			Pre-Modification			Post-Modification
(Dollars in Millions)		of Loans			Outstanding			Outstanding			of Loans			Outstanding			Outstanding
					Loan			Loan						Loan			Loan
					Balance			Balance						Balance			Balance
Commercial			619		$	79		$	77			815		$	34		$	33
Commercial real estate			15			11			8			63			80			78
Residential mortgages			528			70			70			807			110			105
Credit card			6,816			40			40			7,818			48			48
Other retail			787			21			20			1,865			49			49
Total loans, excluding GNMA and covered loans			8,765			221			215			11,368			321			313
Loans purchased from GNMA mortgage pools			2,563			257			246			1,256			177			182
Covered loans			13			9			8			50			53			41
Total loans			11,341		$	487		$	469			12,674		$	551		$	536
Residential mortgages, home equity and second mortgages, and loans purchased from GNMA mortgage pools in the table above include trial period arrangements offered to customers during the periods presented. The post-modification balances for these loans reflect the current outstanding balance until a permanent modification is made. In addition, the post-modification balances typically include capitalization of unpaid accrued interest and/or fees under the various modification programs. For those loans modified as TDRs during the first quarter of 2014, at March 31, 2014, 227 residential mortgages, 21 home equity and second mortgage loans and 1,657 loans purchased from GNMA mortgage pools with outstanding balances of $27 million, $1 million and $204 million, respectively, were in a trial period and have estimated post-modification balances of $28 million, $1 million and $194 million, respectively, assuming permanent modification occurs at the end of the trial period.
The Company has implemented certain restructuring programs that may result in TDRs. However, many of the Company’s TDRs are also determined on a case-by-case basis in connection with ongoing loan collection processes.
For the commercial lending segment, modifications generally result in the Company working with borrowers on a case-by-case basis. Commercial and commercial real estate modifications generally include extensions of the maturity date and may be accompanied by an increase or decrease to the interest rate, which may not be deemed a market rate of interest. In addition, the Company may work with the borrower in identifying other changes that mitigate loss to the Company, which may include additional collateral or guarantees to support the loan. To a lesser extent, the Company may waive contractual principal. The Company classifies these concessions as TDRs to the extent the Company determines that the borrower is experiencing financial difficulty.
Modifications for the consumer lending segment are generally part of programs the Company has initiated. The Company participates in the U.S. Department of Treasury Home Affordable Modification Program (“HAMP”). HAMP gives qualifying homeowners an opportunity to permanently modify residential mortgage loans and achieve more affordable monthly payments, with the U.S. Department of Treasury compensating the Company for a portion of the reduction in monthly amounts due from borrowers participating in this program. The Company also modifies residential mortgage loans under Federal Housing Administration, Department of Veterans Affairs, or its own internal programs. Under these programs, the Company provides concessions to qualifying borrowers experiencing financial difficulties. The concessions may include adjustments to interest rates, conversion of adjustable rates to fixed rates, extension of maturity dates or deferrals of payments, capitalization of accrued interest and/or outstanding advances, or in limited situations, partial forgiveness of loan principal. In most instances, participation in residential mortgage loan restructuring programs requires the customer to complete a short-term trial period. A permanent loan modification is contingent on the customer successfully completing the trial period arrangement and the loan documents are not modified until that time. The Company reports loans in a trial period arrangement as TDRs.
Credit card and other retail loan modifications are generally part of two distinct restructuring programs. The Company offers workout programs providing customers experiencing financial difficulty with modifications whereby balances may be amortized up to 60 months, and generally include waiver of fees and reduced interest rates. The Company also provides modification programs to qualifying customers experiencing a temporary financial hardship in which reductions are made to monthly required minimum payments for up to 12 months. Balances related to these programs are generally frozen; however, accounts may be reopened upon successful exit of the program, in which account privileges may be restored.
In addition, the Company considers secured loans to consumer borrowers that have debt discharged through bankruptcy where the borrower has not reaffirmed the debt to be TDRs.
Modifications to loans in the covered segment are similar in nature to that described above for non-covered loans, and the evaluation and determination of TDR status is similar, except that acquired loans restructured after acquisition are not considered TDRs for purposes of the Company’s accounting and disclosure if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools. Losses associated with the modification on covered loans, including the economic impact of interest rate reductions, are generally eligible for reimbursement under loss sharing agreements with the FDIC.
The following table provides a summary of TDR loans that defaulted (fully or partially charged-off or became 90 days or more past due) during the periods presented that were modified as TDRs within 12 months previous to default:
		2014						2013
Three Months Ended March 31		Number			Amount			Number			Amount
(Dollars in Millions)		of Loans			Defaulted			of Loans			Defaulted
Commercial			145		$	5			168		$	2
Commercial real estate			6			7			19			28
Residential mortgages			148			22			183			31
Credit card			1,461			8			1,986			11
Other retail			185			6			517			28
Total loans, excluding GNMA and covered loans			1,945			48			2,873			100
Loans purchased from GNMA mortgage pools			71			10			3,822			478
Covered loans			8			3			10			3
Total loans			2,024		$	61			6,705		$	581
In addition to the defaults in the table above, for the three months ended March 31, 2014, the Company had a total of 176 residential mortgage loans, home equity and second mortgage loans and loans purchased from GNMA mortgage pools with aggregate outstanding balances of $23 million where borrowers did not successfully complete the trial period arrangement and therefore are no longer eligible for a permanent modification under the applicable modification program.
Covered Assets Covered assets represent loans and other assets acquired from the FDIC, subject to loss sharing agreements, and include expected reimbursements from the FDIC. The carrying amount of the covered assets consisted of purchased impaired loans, purchased nonimpaired loans and other assets as shown in the following table:
		March 31, 2014												December 31, 2013
(Dollars in Millions)		Purchased			Purchased			Other			Total			Purchased			Purchased			Other			Total
		Impaired			Nonimpaired			Assets						Impaired			Nonimpaired			Assets
		Loans			Loans									Loans			Loans
Commercial loans		$	–		$	28		$	–		$	28		$	–		$	32		$	–		$	32
Commercial real estate loans			649			1,450			–			2,099			738			1,494			–			2,232
Residential mortgage loans			2,988			855			–			3,843			3,037			890			–			3,927
Credit card loans			–			5			–			5			–			5			–			5
Other retail loans			–			644			–			644			–			666			–			666
Losses reimbursable by the FDIC (a)			–			–			772			772			–			–			798			798
Unamortized changes in FDIC asset (b)			–			–			708			708			–			–			802			802
Covered loans			3,637			2,982			1,480			8,099			3,775			3,087			1,600			8,462
Foreclosed real estate			–			–			73			73			–			–			97			97
Total covered assets		$	3,637		$	2,982		$	1,553		$	8,172		$	3,775		$	3,087		$	1,697		$	8,559
(a)	Relates to loss sharing agreements with remaining terms up to five years.
(b)	Represents decreases in expected reimbursements by the FDIC as a result of decreases in expected losses on the covered loans. These amounts are amortized as a reduction in interest income on covered loans over the shorter of the expected life of the respective covered loans or the remaining contractual term of the indemnification agreements.
At March 31, 2014, $4 million of the purchased impaired loans included in covered loans were classified as nonperforming assets, compared with $5 million at December 31, 2013, because the expected cash flows are primarily based on the liquidation of underlying collateral and the timing and amount of the cash flows could not be reasonably estimated. Interest income is recognized on other purchased impaired loans through accretion of the difference between the carrying amount of those loans and their expected cash flows. The initial determination of the fair value of the purchased loans includes the impact of expected credit losses and, therefore, no allowance for credit losses is recorded at the purchase date. To the extent credit deterioration occurs after the date of acquisition, the Company records an allowance for credit losses.

Accounting_for_Transfers_and_S

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	3 Months Ended
	Mar. 31, 2014
Transfers And Servicing [Abstract]	'
Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	'
	Note 4	Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities
	The Company transfers financial assets in the normal course of business. The majority of the Company’s financial asset transfers are residential mortgage loan sales primarily to government-sponsored enterprises (“GSEs”), transfers of tax-advantaged investments, commercial loan sales through participation agreements, and other individual or portfolio loan and securities sales. In accordance with the accounting guidance for asset transfers, the Company considers any ongoing involvement with transferred assets in determining whether the assets can be derecognized from the balance sheet. Guarantees provided to certain third-parties in connection with the transfer of assets are further discussed in Note 14.
	For loans sold under participation agreements, the Company also considers whether the terms of the loan participation agreement meet the accounting definition of a participating interest. With the exception of servicing and certain performance-based guarantees, the Company’s continuing involvement with financial assets sold is minimal and generally limited to market customary representation and warranty clauses. Any gain or loss on sale depends on the previous carrying amount of the transferred financial assets, the consideration received, and any liabilities incurred in exchange for the transferred assets. Upon transfer, any servicing assets and other interests that continue to be held by the Company are initially recognized at fair value. For further information on mortgage servicing rights (“MSRs”), refer to Note 5. On a limited basis, the Company may acquire and package high-grade corporate bonds for select corporate customers, in which the Company generally has no continuing involvement with these transactions. Additionally, the Company is an authorized GNMA issuer and issues GNMA securities on a regular basis. The Company has no other asset securitizations or similar asset-backed financing arrangements that are off-balance sheet.
	The Company is involved in various entities that are considered to be variable interest entities (“VIEs”). The Company’s investments in VIEs are primarily related to investments promoting affordable housing, community development and renewable energy sources. Some of these tax-advantaged investments support the Company’s regulatory compliance with the Community Reinvestment Act. The Company’s investments in these entities generate a return primarily through the realization of federal and state income tax credits, and other tax benefits, such as tax deductions from operating losses of the investments, over specified time periods. These tax credits are recognized as a reduction of tax expense or, for investments qualifying as investment tax credits, as a reduction to the related investment asset. In January 2014, the Financial Accounting Standards Board issued accounting guidance for qualified affordable housing projects. This new guidance permits the Company to present the expense on certain qualified affordable housing investments in tax expense rather than noninterest expense. The Company adopted this guidance January 1, 2014, on a prospective basis, because the impact on prior financial statements was not material. The Company recognized federal and state income tax credits related to its affordable housing and other tax advantaged investments in tax expense of $178 million and $167 million for the three months ended March 31, 2014 and 2013, respectively. The Company also recognized $103 million and $69 million of investment tax credits for the three months ended March 31, 2014 and 2013, respectively. The Company recognized $164 million and $212 million of expenses related to all of these investments for the three months ended March 31, 2014 and 2013, respectively, of which $71 million and $80 million, respectively, was included in tax expense and the remainder was included in noninterest expense.
	The Company is not required to consolidate VIEs in which it has concluded it does not have a controlling financial interest, and thus is not the primary beneficiary. In such cases, the Company does not have both the power to direct the entities’ most significant activities and the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIEs. The Company’s investments in these unconsolidated VIEs, including funded and unfunded capital commitments, are carried in other assets on the Consolidated Balance Sheet. The Company’s unfunded capital and other commitments related to these unconsolidated VIEs are generally carried in other liabilities on the Consolidated Balance Sheet. The Company’s maximum exposure to loss from these unconsolidated VIEs include the investment recorded on the Company’s Consolidated Balance Sheet, net of unfunded capital commitments, and previously recorded tax credits which remain subject to recapture by taxing authorities based on compliance features required to be met at the project level. While the Company believes potential losses from these investments are remote, the maximum exposure was determined by assuming a scenario where the community-based business and housing projects completely fail and do not meet certain government compliance requirements resulting in recapture of the related tax credits.
	The following table provides a summary of investments in community development and tax-advantaged VIEs that the Company has not consolidated:
	(Dollars in Millions)	March 31,		December 31,
		2014		2013
	Investment carrying amount	$	4,036	$	4,178
	Unfunded capital and other commitments		1,532		1,661
	Maximum exposure to loss		7,453		7,390
	The Company’s individual net investments in these unconsolidated VIEs, which exclude any unfunded capital commitments, ranged from less than $1 million to $34 million at March 31, 2014, compared with less than $1 million to $37 million at December 31, 2013.
	In addition, the Company sponsors entities to which it transfers tax-advantaged investments to third parties. At March 31, 2014, approximately $2.5 billion of the Company’s assets and $1.9 billion of its liabilities included on the Consolidated Balance Sheet were related to community development and tax-advantaged investment VIEs which the Company has consolidated, primarily related to these transfers. These amounts compared to $2.5 billion and $1.8 billion, respectively, at December 31, 2013. The majority of the assets of these consolidated VIEs are reported in other assets, and the liabilities are reported in long-term debt and other liabilities. The assets of a particular VIE are the primary source of funds to settle its obligations. The creditors of the VIEs do not have recourse to the general credit of the Company. The Company’s exposure to the consolidated VIEs is generally limited to the carrying value of its variable interests plus any related tax credits previously recognized or transferred to others with a guarantee.
	The Company also sponsors a conduit to which it previously transferred high-grade investment securities. The Company consolidates the conduit because of its ability to manage the activities of the conduit. At March 31, 2014, $115 million of the held-to-maturity investment securities on the Company’s Consolidated Balance Sheet were related to the conduit, compared with $116 million at December 31, 2013.
	In addition, the Company sponsors a municipal bond securities tender option bond program. The Company controls the activities of the program’s entities, is entitled to the residual returns and provides credit, liquidity and remarketing arrangements to the program. As a result, the Company has consolidated the program’s entities. At March 31, 2014, $4.5 billion of available-for-sale securities and $4.3 billion of short-term borrowings on the Consolidated Balance Sheet were related to the tender option bond program, compared with $4.6 billion of available-for-sale securities and $4.6 billion of short-term borrowings at December 31, 2013.
	The Company also has noncontrolling financial investments in private investment funds and partnerships considered VIEs, which are not consolidated. The Company’s recorded investment in these entities, carried in other assets on the Consolidated Balance Sheet, was approximately $99 million at March 31, 2014, compared with $98 million at December 31, 2013. The maximum exposure to loss related to these VIEs was $107 million at March 31, 2014 and December 31, 2013, representing the Company’s investment balance and its unfunded commitments to invest additional amounts.

Mortgage_Servicing_Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
Mortgage Servicing Rights	'
	Note 5		Mortgage Servicing Rights
	The Company serviced $227.2 billion of residential mortgage loans for others at March 31, 2014, and $226.8 billion at December 31, 2013, which include subserviced mortgages with no corresponding MSRs asset. The net impact included in mortgage banking revenue of fair value changes of MSRs due to changes in valuation assumptions and derivatives used to economically hedge MSRs were net gains of $58 million and $41 million for the three months ended March 31, 2014 and 2013, respectively. Loan servicing fees, not including valuation changes, included in mortgage banking revenue, were $188 million and $187 million for the three months ended March 31, 2014 and 2013, respectively.
	Changes in fair value of capitalized MSRs are summarized as follows:
	Three Months Ended March 31		2014			2013
	(Dollars in Millions)
	Balance at beginning of period		$	2,680		$	1,700
	Rights purchased			1			2
	Rights capitalized			84			254
	Changes in fair value of MSRs
	Due to fluctuations in market interest rates (a)			(76	)		127
	Due to revised assumptions or models (b)			12			(6	)
	Other changes in fair value (c)			(83	)		(122	)
	Balance at end of period		$	2,618		$	1,955
	(a)	Includes changes in MSR value associated with changes in market interest rates, including estimated prepayment rates and anticipated earnings on escrow deposits.
	(b)	Includes changes in MSR value not caused by changes in market interest rates, such as changes in cost to service, ancillary income, and discount rate, as well as the impact of any model changes.
	(c)	Primarily represents changes due to realization of expected cash flows over time (decay).
	The estimated sensitivity to changes in interest rates of the fair value of the MSRs portfolio and the related derivative instruments was as follows:
			March 31, 2014																		December 31, 2013
	(Dollars in Millions)		Down			Down			Down			Up			Up			Up			Down			Down			Down			Up			Up			Up
			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps
	MSR portfolio		$	(463	)	$	(210	)	$	(97	)	$	85		$	159		$	297		$	(435	)	$	(199	)	$	(93	)	$	82		$	154		$	287
	Derivative instrument hedges			409			201			96			(84	)		(156	)		(287	)		399			194			91			(82	)		(157	)		(301	)
	Net sensitivity		$	(54	)	$	(9	)	$	(1	)	$	1		$	3		$	10		$	(36	)	$	(5	)	$	(2	)	$	–		$	(3	)	$	(14	)
	The fair value of MSRs and their sensitivity to changes in interest rates is influenced by the mix of the servicing portfolio and characteristics of each segment of the portfolio. The Company’s servicing portfolio consists of the distinct portfolios of government-insured mortgages, conventional mortgages and Mortgage Revenue Bond Programs (“MRBP”). The servicing portfolios are predominantly comprised of fixed-rate agency loans with limited adjustable-rate or jumbo mortgage loans. The MRBP division specializes in servicing loans made under state and local housing authority programs. These programs provide mortgages to low-income and moderate-income borrowers and are generally government-insured programs with a favorable rate subsidy, down payment and/or closing cost assistance.
	A summary of the Company’s MSRs and related characteristics by portfolio was as follows:
			March 31, 2014												December 31, 2013
	(Dollars in Millions)		MRBP			Government			Conventional (b)			Total			MRBP			Government			Conventional (b)			Total
	Servicing portfolio		$	16,459		$	41,550		$	166,628		$	224,637		$	15,896		$	41,659		$	169,287		$	226,842
	Fair value		$	188		$	485		$	1,945		$	2,618		$	180		$	500		$	2,000		$	2,680
	Value (bps) (a)			114			117			117			117			113			120			118			118
	Weighted-average servicing fees (bps)			39			32			29			30			39			32			29			30
	Multiple (value/servicing fees)			2.92			3.66			4.03			3.9			2.9			3.75			4.07			3.93
	Weighted-average note rate			4.67	%		4.23	%		4.16	%		4.21	%		4.7	%		4.24	%		4.17	%		4.22	%
	Weighted-average age (in years)			3.8			2.8			2.7			2.8			3.8			2.6			2.5			2.6
	Weighted-average expected prepayment (constant prepayment rate)			13.3	%		11.8	%		11.1	%		11.4	%		13.5	%		11.5	%		10.9	%		11.2	%
	Weighted-average expected life (in years)			6.2			6.7			7			6.9			6.2			6.9			7.2			7.1
	Weighted-average discount rate			11.9	%		11.2	%		9.8	%		10.2	%		11.9	%		11.2	%		9.8	%		10.2	%
	(a)	Value is calculated as fair value divided by the servicing portfolio.
	(b)	Represents loans sold primarily to GSEs.

Preferred_Stock

Preferred Stock	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Preferred Stock	'
	Note 6		Preferred Stock
	At March 31, 2014 and December 31, 2013, the Company had authority to issue 50 million shares of preferred stock. The number of shares issued and outstanding and the carrying amount of each outstanding series of the Company’s preferred stock was as follows:
			March 31, 2014								December 31, 2013
	(Dollars in Millions)		Shares		Liquidation		Discount		Carrying		Shares		Liquidation		Discount		Carrying
			Issued and		Preference				Amount		Issued and		Preference				Amount
			Outstanding								Outstanding
	Series A			12,510	$	1,251	$	145	$	1,106		12,510	$	1,251	$	145	$	1,106
	Series B			40,000		1,000		–		1,000		40,000		1,000		–		1,000
	Series F			44,000		1,100		12		1,088		44,000		1,100		12		1,088
	Series G			43,400		1,085		10		1,075		43,400		1,085		10		1,075
	Series H			20,000		500		13		487		20,000		500		13		487
	Total preferred stock (a)			159,910	$	4,936	$	180	$	4,756		159,910	$	4,936	$	180	$	4,756
	(a)	The par value of all shares issued and outstanding at March 31, 2014 and December 31, 2013, was $1.00 per share.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	Note 7	Accumulated Other Comprehensive Income (Loss)
	Shareholders’ equity is affected by transactions and valuations of asset and liability positions that require adjustments to accumulated other comprehensive income (loss). The reconciliation of the transactions affecting accumulated other comprehensive income (loss) included in shareholders’ equity for the three months ended March 31, is as follows:
	(Dollars in Millions)	Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign			Total
		(Losses) on			(Losses) on			(Losses) on			(Losses) on			Currency
		Securities			Securities			Derivative Hedges			Retirement Plans			Translation
		Available-For-Sale			Transferred From
					Available-For-
					Sale to Held-To-
					Maturity
	2014
	Balance at beginning of period	$	(77	)	$	70		$	(261	)	$	(743	)	$	(60	)	$	(1,071	)
	Changes in unrealized gains and losses		301			–			(11	)		–			–			290
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		–			–			–			–			–			–
	Foreign currency translation adjustment		–			–			–			–			(4	)		(4	)
	Reclassification to earnings of realized gains and losses		(5	)		(7	)		49			36			–			73
	Applicable income taxes		(113	)		3			(15	)		(14	)		1			(138	)
	Balance at end of period	$	106		$	66		$	(238	)	$	(721	)	$	(63	)	$	(850	)
	2013
	Balance at beginning of period	$	679		$	107		$	(404	)	$	(1,265	)	$	(40	)	$	(923	)
	Changes in unrealized gains and losses		(120	)		–			(3	)		(1	)		–			(124	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		6			–			–			–			–			6
	Foreign currency translation adjustment		–			–			–			–			(10	)		(10	)
	Reclassification to earnings of realized gains and losses		(5	)		(20	)		54			62			–			91
	Applicable income taxes		43			7			(18	)		(17	)		4			19
	Balance at end of period	$	603		$	94		$	(371	)	$	(1,221	)	$	(46	)	$	(941	)
	Additional detail about the impact to net income for items reclassified out of accumulated other comprehensive income and into earnings for the three months ended March 31, is as follows:
		Impact to Net Income
	(Dollars in Millions)	2014			2013			Affected Line Item in the
								Consolidated Statement of Income
	Unrealized gains (losses) on securities available-for-sale
	Realized gains (losses) on sale of securities	$	5		$	12		Total securities gains (losses), net
	Other-than-temporary impairment recognized in earnings		–			(7	)
			5			5		Total before tax
			(2	)		(2	)	Applicable income taxes
			3			3		Net-of-tax
	Unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity
	Amortization of unrealized gains		7			20		Interest income
			(3	)		(7	)	Applicable income taxes
			4			13		Net-of-tax
	Unrealized gains (losses) on derivative hedges
	Realized gains (losses) on derivative hedges		(49	)		(54	)	Net interest income
			19			21		Applicable income taxes
			(30	)		(33	)	Net-of-tax
	Unrealized gains (losses) on retirement plans
	Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization		(36	)		(62	)	Employee benefits expense
			14			24		Applicable income taxes
			(22	)		(38	)	Net-of-tax
	Total impact to net income	$	(45	)	$	(55	)

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Note 8	Earnings Per Share
	The components of earnings per share were:
		Three Months Ended
		March 31,
	(Dollars and Shares in Millions, Except Per Share Data)	2014			2013
	Net income attributable to U.S. Bancorp	$	1,397		$	1,428
	Preferred dividends		(60	)		(64	)
	Earnings allocated to participating stock awards		(6	)		(6	)
	Net income applicable to U.S. Bancorp common shareholders	$	1,331		$	1,358
	Average common shares outstanding		1,818			1,858
	Net effect of the exercise and assumed purchase of stock awards		10			9
	Average diluted common shares outstanding		1,828			1,867
	Earnings per common share	$	0.73		$	0.73
	Diluted earnings per common share	$	0.73		$	0.73
	Options outstanding at March 31, 2013, to purchase 11 million common shares were not included in the computation of diluted earnings per share for the three months ended March 31, 2013, because they were antidilutive.

Employee_Benefits

Employee Benefits	3 Months Ended
	Mar. 31, 2014
Compensation And Retirement Disclosure [Abstract]	'
Employee Benefits	'
	Note 9	Employee Benefits
	The components of net periodic benefit cost for the Company’s retirement plans were:
		Three Months Ended March 31,
		Pension Plans						Postretirement
								Welfare Plan
	(Dollars in Millions)	2014			2013			2014			2013
	Service cost	$	38		$	42		$	–		$	1
	Interest cost		49			42			1			1
	Expected return on plan assets		(52	)		(44	)		–			–
	Prior service cost (credit) and transition obligation (asset) amortization		(1	)		(1	)		(1	)		–
	Actuarial loss (gain) amortization		40			66			(2	)		(3	)
	Net periodic benefit cost	$	74		$	105		$	(2	)	$	(1	)

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 10	Income Taxes
	The components of income tax expense were:
		Three Months Ended
		March 31,
	(Dollars in Millions)	2014			2013
	Federal
	Current	$	490		$	490
	Deferred		(67	)		12
	Federal income tax		423			502
	State
	Current		83			58
	Deferred		(10	)		(2	)
	State income tax		73			56
	Total income tax provision	$	496		$	558
	A reconciliation of expected income tax expense at the federal statutory rate of 35 percent to the Company’s applicable income tax expense follows:
		Three Months Ended
		March 31,
	(Dollars in Millions)	2014			2013
	Tax at statutory rate	$	668		$	681
	State income tax, at statutory rates, net of federal tax benefit		43			36
	Tax effect of
	Tax credits and benefits, net of related expenses		(165	)		(106	)
	Tax-exempt income		(52	)		(54	)
	Noncontrolling interests		(5	)		14
	Other items		7			(13	)
	Applicable income taxes	$	496		$	558
	The Company’s income tax returns are subject to review and examination by federal, state, local and foreign government authorities. On an ongoing basis, numerous federal, state, local and foreign examinations are in progress and cover multiple tax years. As of March 31, 2014, the federal taxing authority has completed its examination of the Company through the fiscal year ended December 31, 2010. The years open to examination by foreign, state and local government authorities vary by jurisdiction.
	The Company’s net deferred tax liability was $1.5 billion at March 31, 2014, and $1.3 billion at December 31, 2013.

Derivative_Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	Note 11		Derivative Instruments
	In the ordinary course of business, the Company enters into derivative transactions to manage various risks and to accommodate the business requirements of its customers. The Company recognizes all derivatives on the Consolidated Balance Sheet at fair value in other assets or in other liabilities. On the date the Company enters into a derivative contract, the derivative is designated as either a hedge of the fair value of a recognized asset or liability (“fair value hedge”); a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”); a hedge of the volatility of an investment in foreign operations driven by changes in foreign currency exchange rates (“net investment hedge”); or a designation is not made as it is a customer-related transaction, an economic hedge for asset/liability risk management purposes or another stand-alone derivative created through the Company’s operations (“free-standing derivative”). When a derivative is designated as a fair value, cash flow or net investment hedge, the Company performs an assessment, at inception and, at a minimum, quarterly thereafter, to determine the effectiveness of the derivative in offsetting changes in the value or cash flows of the hedged item(s).
	Fair Value Hedges These derivatives are interest rate swaps the Company uses to hedge the change in fair value related to interest rate changes of its underlying fixed-rate debt. Changes in the fair value of derivatives designated as fair value hedges, and changes in the fair value of the hedged items, are recorded in earnings. All fair value hedges were highly effective for the three months ended March 31, 2014, and the change in fair value attributed to hedge ineffectiveness was not material.
	Cash Flow Hedges These derivatives are interest rate swaps the Company uses to hedge the forecasted cash flows from its underlying variable-rate loans and debt. Changes in the fair value of derivatives designated as cash flow hedges are recorded in other comprehensive income (loss) until the cash flows of the hedged items are realized. If a derivative designated as a cash flow hedge is terminated or ceases to be highly effective, the gain or loss in other comprehensive income (loss) is amortized to earnings over the period the forecasted hedged transactions impact earnings. If a hedged forecasted transaction is no longer probable, hedge accounting is ceased and any gain or loss included in other comprehensive income (loss) is reported in earnings immediately, unless the forecasted transaction is at least reasonably possible of occurring, whereby the amounts remain within other comprehensive income (loss). At March 31, 2014, the Company had $238 million (net-of-tax) of realized and unrealized losses on derivatives classified as cash flow hedges recorded in other comprehensive income (loss), compared with $261 million (net-of-tax) at December 31, 2013. The estimated amount to be reclassified from other comprehensive income (loss) into earnings during the remainder of 2014 and the next 12 months are losses of $88 million (net-of-tax) and $119 million (net-of-tax), respectively. This amount includes gains and losses related to hedges that were terminated early for which the forecasted transactions are still probable. All cash flow hedges were highly effective for the three months ended March 31, 2014, and the change in fair value attributed to hedge ineffectiveness was not material.
	Net Investment Hedges The Company uses forward commitments to sell specified amounts of certain foreign currencies, and occasionally non-derivative debt instruments, to hedge the volatility of its investment in foreign operations driven by fluctuations in foreign currency exchange rates. The ineffectiveness on all net investment hedges was not material for the three months ended March 31, 2014. There were no non-derivative debt instruments designated as net investment hedges at March 31, 2014 or December 31, 2013.
	Other Derivative Positions The Company enters into free-standing derivatives to mitigate interest rate risk and for other risk management purposes. These derivatives include forward commitments to sell to-be-announced securities (“TBAs”) and other commitments to sell residential mortgage loans, which are used to economically hedge the interest rate risk related to residential mortgage loans held for sale (“MLHFS”) and unfunded mortgage loan commitments. The Company also enters into interest rate swaps, forward commitments to buy TBAs, U.S. Treasury futures and options on U.S. Treasury futures to economically hedge the change in the fair value of the Company’s MSRs. The Company also enters into foreign currency forwards to economically hedge remeasurement gains and losses the Company recognizes on foreign currency denominated assets and liabilities. In addition, the Company acts as a seller and buyer of interest rate derivatives and foreign exchange contracts for its customers. To mitigate the market and liquidity risk associated with these customer derivatives, the Company historically has entered into similar offsetting positions with broker-dealers. In 2014, the Company began to actively manage the risks from its exposure to customer-related interest rate positions on a portfolio basis by entering into other derivative or non-derivative financial instruments that partially or fully offset the exposure from these customer-related positions. The Company’s customer derivatives and related hedges are monitored and reviewed by the Company’s Market Risk Committee, which establishes policies for market risk management, including exposure limits for each portfolio. The Company also has derivative contracts that are created through its operations, including commitments to originate MLHFS.
	For additional information on the Company’s purpose for entering into derivative transactions and its overall risk management strategies, refer to “Management Discussion and Analysis — Use of Derivatives to Manage Interest Rate and Other Risks” which is incorporated by reference into these Notes to Consolidated Financial Statements.
	The following table summarizes the asset and liability management derivative positions of the Company:
			Asset Derivatives									Liability Derivatives
	(Dollars in Millions)		Notional			Fair			Weighted-Average			Notional			Fair		Weighted-Average
			Value			Value			Remaining			Value			Value		Remaining
									Maturity								Maturity
									In Years								In Years
	March 31, 2014
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	500		$	17			1.84		$	–		$	–		–
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			272			17			8.52			5,462			451		2.53
	Receive fixed/pay floating swaps			7,000			22			0.6			–			–		–
	Net investment hedges
	Foreign exchange forward contracts			1,082			9			0.04			–			–		–
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			2,259			13			0.07			1,526			1		0.04
	Sell			2,345			7			0.11			2,119			9		0.09
	Options
	Purchased			3,250			–			0.07			–			–		–
	Written			2,427			27			0.08			6			–		0.07
	Receive fixed/pay floating swaps			3,375			5			10.23			100			–		10.23
	Foreign exchange forward contracts			1,618			3			0.01			2,230			8		0.03
	Equity contracts			68			1			1.38			9			–		1.22
	Credit contracts			1,298			4			3.85			2,198			6		3.14
	Total		$	25,494		$	125					$	13,650		$	475
	December 31, 2013
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	500		$	22			2.09		$	–		$	–		–
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			772			26			6.25			4,288			498		2.46
	Receive fixed/pay floating swaps			7,000			26			0.84			–			–		–
	Net investment hedges
	Foreign exchange forward contracts			–			–			–			1,056			4		0.04
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			2,310			9			0.07			1,025			7		0.06
	Sell			5,234			58			0.08			346			4		0.17
	Options
	Purchased			2,300			–			0.07			–			–		–
	Written			1,902			17			0.07			2			–		0.08
	Receive fixed/pay floating swaps			–			–			–			3,540			56		10.22
	Foreign exchange forward contracts			6,813			24			0.02			2,121			4		0.02
	Equity contracts			79			3			1.62			–			–		–
	Credit contracts			1,209			4			4.04			2,352			7		3.08
	Total		$	28,119		$	189					$	14,730		$	580
	The following table summarizes the customer-related derivative positions of the Company:
			Asset Derivatives									Liability Derivatives
	(Dollars in Millions)		Notional			Fair			Weighted-Average			Notional			Fair		Weighted-Average
			Value			Value			Remaining			Value			Value		Remaining
						Maturity									Maturity
						In Years									In Years
March 31, 2014
Interest rate contracts
Receive fixed/pay floating swaps		$	13,905		$	622			5.43		$	6,082		$	52		5.01
Pay fixed/receive floating swaps			5,700			61			4.75			14,226			590		5.43
Options
Purchased			3,249			18			4.54			26			–		3.17
Written			26			–			3.17			3,249			18		4.54
Futures
Buy			–			–			–			124			–		0.21
Sell			787			–			1.29			421			–		1.13
Foreign exchange rate contracts
Forwards, spots and swaps			12,049			445			0.59			11,759			415		0.58
Options
Purchased			724			13			0.58			–			–		–
Written			–			–			–			724			13		0.58
Total		$	36,440		$	1,159					$	36,611		$	1,088
December 31, 2013
Interest rate contracts
Receive fixed/pay floating swaps		$	11,717		$	600			5.11		$	7,291		$	106		5.57
Pay fixed/receive floating swaps			6,746			114			6.03			12,361			560		4.9
Options
Purchased			3,489			33			4.53			–			–		–
Written			–			–			–			3,489			33		4.53
Foreign exchange rate contracts
Forwards, spots and swaps			10,970			457			0.59			9,975			427		0.62
Options
Purchased			364			11			0.53			–			–		–
Written			–			–			–			364			11		0.53
Total		$	33,286		$	1,215					$	33,480		$	1,137
The table below shows the effective portion of the gains (losses) recognized in other comprehensive income (loss) and the gains (losses) reclassified from other comprehensive income (loss) into earnings (net-of-tax) for the three months ended March 31:
		Gains (Losses)						Gains (Losses)
		Recognized in						Reclassified
		Other						from Other
		Comprehensive						Comprehensive
		Income (Loss)						Income (Loss)
								into Earnings
(Dollars in Millions)		2014			2013			2014			2013
Asset and Liability Management Positions
Cash flow hedges
Interest rate contracts (a)		$	(7	)	$	–		$	(30	)	$	(33	)
Net investment hedges
Foreign exchange forward contracts			–			23			–			–
Note:	Ineffectiveness on cash flow and net investment hedges was not material for the three months ended March 31, 2014 and 2013.
(a)	Gains (Losses) reclassified from other comprehensive income (loss) into interest income on loans and interest expense on long-term debt.
The table below shows the gains (losses) recognized in earnings for fair value hedges, other economic hedges and the customer-related positions for the three months ended March 31:
(Dollars in Millions)		Location of Gains (Losses)			2014			2013
		Recognized in Earnings
Asset and Liability Management Positions
Fair value hedges (a)
Interest rate contracts			Other noninterest income		$	(2	)	$	(2	)
Other economic hedges
Interest rate contracts
Futures and forwards			Mortgage banking revenue			(49	)		236
Purchased and written options			Mortgage banking revenue			66			129
Receive fixed/pay floating swaps			Mortgage banking revenue			109			(40	)
Foreign exchange forward contracts			Commercial products revenue			(5	)		8
Credit contracts			Other noninterest income/expense			–			(1	)
Customer-Related Positions
Interest rate contracts
Receive fixed/pay floating swaps			Other noninterest income			134			(96	)
Pay fixed/receive floating swaps			Other noninterest income			(129	)		96
Foreign exchange rate contracts
Forwards, spots and swaps			Commercial products revenue			16			7
(a)	Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $2 million for both the three months ended March 31, 2014 and 2013. The ineffective portion was immaterial for the three months ended March 31, 2014 and 2013.
Derivatives are subject to credit risk associated with counterparties to the derivative contracts. The Company measures that credit risk using a credit valuation adjustment and includes it within the fair value of the derivative. The Company manages counterparty credit risk through diversification of its derivative positions among various counterparties, by entering into master netting arrangements and, where possible, by requiring collateral arrangements. A master netting arrangement allows two counterparties, who have multiple derivative contracts with each other, the ability to net settle amounts under all contracts, including any related collateral, through a single payment and in a single currency. Collateral arrangements require the counterparty to deliver collateral (typically cash or U.S. Treasury and agency securities) equal to the Company’s net derivative receivable, subject to minimum transfer and credit rating requirements.
The Company’s collateral arrangements are predominately bilateral and, therefore, contain provisions that require collateralization of the Company’s net liability derivative positions. Required collateral coverage is based on certain net liability thresholds and contingent upon the Company’s credit rating from two of the nationally recognized statistical rating organizations. If the Company’s credit rating were to fall below credit ratings thresholds established in the collateral arrangements, the counterparties to the derivatives could request immediate additional collateral coverage up to and including full collateral coverage for derivatives in a net liability position. The aggregate fair value of all derivatives under collateral arrangements that were in a net liability position at March 31, 2014, was $965 million. At March 31, 2014, the Company had $804 million of cash posted as collateral against this net liability position.

Netting_Arrangements_for_Certa

Netting Arrangements for Certain Financial Instruments	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
Netting Arrangements for Certain Financial Instruments	'
	Note 12		Netting Arrangements for Certain Financial Instruments
	The majority of the Company’s derivative portfolio consists of bilateral over-the-counter trades. However, per current regulations, certain interest rate swaps and forwards and credit contracts need to be centrally cleared through clearinghouses. In addition, a portion of the Company’s derivative positions are exchange-traded. These are predominately U.S. Treasury futures or options on U.S. Treasury futures. Of the Company’s $112.2 billion of total notional amount of derivative positions at March 31, 2014, $16.2 billion related to those centrally cleared through clearinghouses and $5.8 billion related to those that were exchange-traded. Irrespective of how derivatives are traded, the Company’s derivative contracts include offsetting rights (referred to as netting arrangements), and depending on expected volume, credit risk, and counterparty preference, collateral maintenance may be required. For all derivatives, fair value is determined daily and, depending on the collateral maintenance requirements, the Company and a counterparty may receive or deliver collateral, based upon the net fair value of all derivative positions between the Company and the counterparty. Collateral is typically cash, but securities may be allowed under collateral arrangements with certain counterparties. Receivables and payables related to cash collateral are included in other assets and other liabilities on the Consolidated Balance Sheet, along with the related derivative asset and liability fair values. Any securities pledged to counterparties as collateral remain on the Consolidated Balance Sheet. Securities received from counterparties as collateral are not recognized on the Consolidated Balance Sheet, unless the counterparty defaults. Securities used as collateral can be sold, re-pledged or otherwise used by the party in possession. In general, no restrictions exist on the use of cash collateral by either party. Refer to Note 11 for further discussion of the Company’s derivatives, including collateral arrangements.
	As part of the Company’s treasury and broker-dealer operations, the Company executes transactions that are treated as securities sold under agreements to repurchase or securities purchased under agreements to resell, both of which are accounted for as collateralized financings. Securities sold under agreements to repurchase include repurchase agreements and securities loaned transactions. Securities purchased under agreements to resell include reverse repurchase agreements and securities borrowed transactions. For securities sold under agreements to repurchase, the Company records a liability for the cash received, which is included in short-term borrowings on the Consolidated Balance Sheet. For securities purchased under agreements to resell, the Company records a receivable for the cash paid, which is included in other assets on the Consolidated Balance Sheet.
	Securities transferred to counterparties under repurchase agreements and securities loaned transactions continue to be recognized on the Consolidated Balance Sheet, are measured at fair value, and are included in investment securities or other assets. Securities received from counterparties under reverse repurchase agreements and securities borrowed transactions are not recognized on the Consolidated Balance Sheet unless the counterparty defaults. In connection with all of these transactions, the fair values of the securities are determined daily, and additional cash is obtained or refunded to counterparties where appropriate. The securities transferred under repurchase and reverse repurchase transactions typically are U.S. Treasury securities or agency mortgage-backed securities. The securities loaned or borrowed typically are high-grade corporate bonds traded by the Company’s broker-dealer. In general, the securities transferred can be sold, repledged or otherwise used by the party in possession. No restrictions exist on the use of cash collateral by either party.
	The Company executes its derivative, repurchase/reverse repurchase and securities loaned/borrowed transactions under the respective industry standard agreements. These agreements include master netting arrangements that allow for multiple contracts executed with the same counterparty to be viewed as a single arrangement. This allows for net settlement of a single amount on a daily basis. In the event of default, the master netting arrangement provides for close-out netting, which allows all positions with the defaulting counterparty to be terminated and net settled with a single payment amount.
	The Company has elected to offset the assets and liabilities under netting arrangements for the balance sheet presentation of the majority of its derivative counterparties, excluding centrally cleared derivative contracts due to current uncertainty about the legal enforceability of netting arrangements with the clearinghouses. The netting occurs at the counterparty level, and includes all assets and liabilities related to the derivative contracts, including those associated with cash collateral received or delivered. The Company has not elected to offset the assets and liabilities under netting arrangements for the balance sheet presentation of repurchase/reverse repurchase and securities loaned/borrowed transactions.
	The following tables provide information on the Company’s netting adjustments, and items not offset on the Consolidated Balance Sheet but available for offset in the event of default:
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on						Net
			Recognized		Offset on the			Presented on the		the Consolidated Balance Sheet						Amount
			Assets		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral
										Instruments (b)			Received (c)
	March 31, 2014
	Derivative assets (d)		$	1,218	$	(470	)	$	748	$	(32	)	$	–		$	716
	Reverse repurchase agreements			26		–			26		(19	)		(7	)		–
	Securities borrowed			680		–			680		–			(660	)		20
	Total		$	1,924	$	(470	)	$	1,454	$	(51	)	$	(667	)	$	736
	December 31, 2013
	Derivative assets (d)		$	1,349	$	(599	)	$	750	$	(21	)	$	–		$	729
	Reverse repurchase agreements			87		–			87		(59	)		(28	)		–
	Securities borrowed			723		–			723		–			(698	)		25
	Total		$	2,159	$	(599	)	$	1,560	$	(80	)	$	(726	)	$	754
	(a)	Includes $87 million and $124 million of cash collateral related payables that were netted against derivative assets at March 31, 2014 and December 31, 2013, respectively.
	(b)	For derivative assets this includes any derivative liability fair values that could be offset in the event of counterparty default; for reverse repurchase agreements this includes any repurchase agreement payables that could be offset in the event of counterparty default; for securities borrowed this includes any securities loaned payables that could be offset in the event of counterparty default.
	(c)	Includes the fair value of securities received by the Company from the counterparty. These securities are not included on the Consolidated Balance Sheet unless the counterparty defaults.
	(d)	Excludes $66 million and $55 million of derivative assets centrally cleared or otherwise not subject to netting arrangements at March 31, 2014 and December 31, 2013, respectively.
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on						Net
			Recognized		Offset on the			Presented on the		the Consolidated Balance Sheet						Amount
			Liabilities		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral
										Instruments (b)			Pledged (c)
	March 31, 2014
	Derivative liabilities (d)		$	1,485	$	(1,138	)	$	347	$	(32	)	$	–		$	315
	Repurchase agreements			699		–			699		(19	)		(680	)		–
	Securities loaned			–		–			–		–			–			–
	Total		$	2,184	$	(1,138	)	$	1,046	$	(51	)	$	(680	)	$	315
	December 31, 2013
	Derivative liabilities (d)		$	1,598	$	(1,192	)	$	406	$	(21	)	$	–		$	385
	Repurchase agreements			2,059		–			2,059		(59	)		(2,000	)		–
	Securities loaned			–		–			–		–			–			–
	Total		$	3,657	$	(1,192	)	$	2,465	$	(80	)	$	(2,000	)	$	385
	(a)	Includes $754 million and $717 million of cash collateral related receivables that were netted against derivative liabilities at March 31, 2014 and December 31, 2013, respectively.
	(b)	For derivative liabilities this includes any derivative asset fair values that could be offset in the event of counterparty default; for repurchase agreements this includes any reverse repurchase agreement receivables that could be offset in the event of counterparty default; for securities loaned this includes any securities borrowed receivables that could be offset in the event of counterparty default.
	(c)	Includes the fair value of securities pledged by the Company to the counterparty. These securities are included on the Consolidated Balance Sheet unless the Company defaults.
	(d)	Excludes $78 million and $119 million of derivative liabilities centrally cleared or otherwise not subject to netting arrangements at March 31, 2014 and December 31, 2013, respectively.

Fair_Values_of_Assets_and_Liab

Fair Values of Assets and Liabilities	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Values of Assets and Liabilities	'
	Note 13		Fair Values of Assets and Liabilities
	The Company uses fair value measurements for the initial recording of certain assets and liabilities, periodic remeasurement of certain assets and liabilities, and disclosures. Derivatives, trading and available-for-sale investment securities, substantially all MLHFS and MSRs are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets on a nonrecurring basis, such as loans held for sale, loans held for investment and certain other assets. These nonrecurring fair value adjustments typically involve application of lower-of-cost-or-fair value accounting or impairment write-downs of individual assets.
	Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value measurement reflects all of the assumptions that market participants would use in pricing the asset or liability, including assumptions about the risk inherent in a particular valuation technique, the effect of a restriction on the sale or use of an asset and the risk of nonperformance.
	The Company groups its assets and liabilities measured at fair value into a three-level hierarchy for valuation techniques used to measure financial assets and financial liabilities at fair value. This hierarchy is based on whether the valuation inputs are observable or unobservable. These levels are:
		•		Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 1 includes U.S. Treasury and exchange-traded instruments.
		•		Level 2 – Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 includes debt securities that are traded less frequently than exchange-traded instruments and which are typically valued using third party pricing services; derivative contracts and other assets and liabilities, including securities, whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data; and MLHFS whose values are determined using quoted prices for similar assets or pricing models with inputs that are observable in the market or can be corroborated by observable market data.
		•		Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. This category includes MSRs, certain debt securities and certain derivative contracts.
	When the Company changes its valuation inputs for measuring financial assets and financial liabilities at fair value, either due to changes in current market conditions or other factors, it may need to transfer those assets or liabilities to another level in the hierarchy based on the new inputs used. The Company recognizes these transfers at the end of the reporting period that the transfers occur. During the three months ended March 31, 2014 and 2013, there were no transfers of financial assets or financial liabilities between the hierarchy levels.
	The Company has processes and controls in place to increase the reliability of estimates it makes in determining fair value measurements. Items quoted on an exchange are verified to the quoted price. Items provided by a third party pricing service are subject to price verification procedures as discussed in more detail in the specific valuation discussions below. For fair value measurements modeled internally, the Company’s valuation models are subject to the Company’s Model Risk Governance Policy and Program, as maintained by the Company’s credit administration department. The purpose of model validation is to assess the accuracy of the models’ input, processing, and reporting components. All models are required to be independently reviewed and approved prior to being placed in use, and are subject to formal change control procedures. Under the Company’s Model Risk Governance Policy, models are required to be reviewed at least annually to ensure they are operating as intended. Inputs into the models are market observable inputs whenever available. When market observable inputs are not available, the inputs are developed based upon analysis of historical experience and evaluation of other relevant market data. Significant unobservable model inputs are subject to review by senior management in corporate functions, who are independent from the modeling. Significant unobservable model inputs are also compared to actual results, typically on a quarterly basis. Significant Level 3 fair value measurements are also subject to corporate-level review and are benchmarked to market transactions or other market data, when available. Additional discussion of processes and controls are provided in the valuation methodologies section that follows.
	The following section describes the valuation methodologies used by the Company to measure financial assets and liabilities at fair value and for estimating fair value for financial instruments not recorded at fair value as required under disclosure guidance related to the fair value of financial instruments. In addition, the following section includes an indication of the level of the fair value hierarchy in which the assets or liabilities are classified. Where appropriate, the description includes information about the valuation models and key inputs to those models. During the three months ended March 31, 2014 and 2013, there were no significant changes to the valuation techniques used by the Company to measure fair value.
	Cash and Due From Banks The carrying value of cash and due from banks approximate fair value and are classified within Level 1. Fair value is provided for disclosure purposes only.
	Federal Funds Sold and Securities Purchased Under Resale Agreements The carrying value of federal funds sold and securities purchased under resale agreements approximate fair value because of the relatively short time between the origination of the instrument and its expected realization and are classified within Level 2. Fair value is provided for disclosure purposes only.
	Investment Securities When quoted market prices for identical securities are available in an active market, these prices are used to determine fair value and these securities are classified within Level 1 of the fair value hierarchy. Level 1 investment securities are predominantly U.S. Treasury securities.
	For other securities, quoted market prices may not be readily available for the specific securities. When possible, the Company determines fair value based on market observable information, including quoted market prices for similar securities, inactive transaction prices, and broker quotes. These securities are classified within Level 2 of the fair value hierarchy. Level 2 valuations are generally provided by a third party pricing service. The Company reviews the valuation methodologies utilized by the pricing service and, on a quarterly basis, reviews the security level prices provided by the pricing service against management’s expectation of fair value, based on changes in various benchmarks and market knowledge from recent trading activity. Additionally, each quarter, the Company validates the fair value provided by the pricing services by comparing them to recent observable market trades (where available), broker provided quotes, or other independent secondary pricing sources. Prices obtained from the pricing service are adjusted if they are found to be inconsistent with observable market data. Level 2 investment securities are predominantly agency mortgage-backed securities, certain other asset-backed securities, municipal securities, corporate debt securities, agency debt securities and perpetual preferred securities.
	The fair value of securities for which there are no market trades, or where trading is inactive as compared to normal market activity, are classified within Level 3 of the fair value hierarchy. The Company determines the fair value of these securities by using a discounted cash flow methodology and incorporating observable market information, where available. These valuations are modeled by a unit within the Company’s treasury department. The valuations use assumptions regarding housing prices, interest rates and borrower performance. Inputs are refined and updated at least quarterly to reflect market developments and actual performance. The primary valuation drivers of these securities are the prepayment rates, default rates and default severities associated with the underlying collateral, as well as the discount rate used to calculate the present value of the projected cash flows. Level 3 fair values, including the assumptions used, are subject to review by senior management in corporate functions, who are independent from the modeling. The fair value measurements are also compared to fair values provided by third party pricing services, where available. Securities classified within Level 3 include non-agency mortgage-backed securities, non-agency commercial mortgage-backed securities, certain asset-backed securities, certain collateralized debt obligations and collateralized loan obligations and certain corporate debt securities.
	Mortgage Loans Held For Sale MLHFS measured at fair value, for which an active secondary market and readily available market prices exist, are initially valued at the transaction price and are subsequently valued by comparison to instruments with similar collateral and risk profiles. MLHFS are classified within Level 2. Included in mortgage banking revenue was a $52 million net gain and a $175 million net loss for the three months ended March 31, 2014 and 2013, respectively, from the changes to fair value of these MLHFS under fair value option accounting guidance. Changes in fair value due to instrument specific credit risk were immaterial. Interest income for MLHFS is measured based on contractual interest rates and reported as interest income on the Consolidated Statement of Income. Electing to measure MLHFS at fair value reduces certain timing differences and better matches changes in fair value of these assets with changes in the value of the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting.
	Loans The loan portfolio includes adjustable and fixed-rate loans, the fair value of which was estimated using discounted cash flow analyses and other valuation techniques. The expected cash flows of loans considered historical prepayment experiences and estimated credit losses and were discounted using current rates offered to borrowers with similar credit characteristics. Generally, loan fair values reflect Level 3 information. Fair value is provided for disclosure purposes only, with the exception of impaired collateral-based loans that are measured at fair value on a non-recurring basis utilizing the underlying collateral fair value.
	Mortgage Servicing Rights MSRs are valued using a discounted cash flow methodology. Accordingly, MSRs are classified within Level 3. The Company determines fair value by estimating the present value of the asset’s future cash flows using prepayment rates, discount rates, and other assumptions. The MSR valuations, as well as the assumptions
	used, are developed by the mortgage banking division and are subject to review by senior management in corporate functions, who are independent from the modeling. The MSR valuations and assumptions are validated through comparison to trade information, publicly available data and industry surveys when available, and are also compared to independent third party valuations each quarter. Risks inherent in MSR valuation include higher than expected prepayment rates and/or delayed receipt of cash flows. There is minimal observable market activity for MSRs on comparable portfolios, and, therefore the determination of fair value requires significant management judgment. Refer to Note 5 for further information on MSR valuation assumptions.
	Derivatives The majority of derivatives held by the Company are executed over-the-counter and are valued using standard cash flow, Black-Derman-Toy and Monte Carlo valuation techniques. The models incorporate inputs, depending on the type of derivative, including interest rate curves, foreign exchange rates and volatility. In addition, all derivative values incorporate an assessment of the risk of counterparty nonperformance, measured based on the Company’s evaluation of credit risk as well as external assessments of credit risk, where available. The Company monitors and manages its nonperformance risk by considering its ability to net derivative positions under master netting arrangements, as well as collateral received or provided under collateral arrangements. Accordingly, the Company has elected to measure the fair value of derivatives, at a counterparty level, on a net basis. The majority of the derivatives are classified within Level 2 of the fair value hierarchy, as the significant inputs to the models, including nonperformance risk, are observable. However, certain derivative transactions are with counterparties where risk of nonperformance cannot be observed in the market, and therefore the credit valuation adjustments result in these derivatives being classified within Level 3 of the fair value hierarchy. The credit valuation adjustments for nonperformance risk are determined by the Company’s treasury department using credit assumptions provided by credit administration. The credit assumptions are compared to actual results quarterly and are recalibrated as appropriate.
	The Company also has commitments to purchase and originate mortgage loans that meet the accounting requirements of a derivative. These mortgage loan commitments are valued by pricing models that include market observable and unobservable inputs, which result in the commitments being classified within Level 3 of the fair value hierarchy. The unobservable inputs include assumptions about the percentage of commitments that actually become a closed loan and the MSR value that is inherent in the underlying loan value, both of which are developed by the Company’s mortgage banking division. The closed loan percentages for the mortgage loan commitments are monitored on an on-going basis, as these percentages are also used for the Company’s economic hedging activities. The inherent MSR value for the commitments are generated by the same models used for the Company’s MSRs and thus are subject to the same processes and controls as described for the MSRs above.
	Other Financial Instruments Other financial instruments include cost method equity investments and certain community development and tax-advantaged related assets and liabilities. The majority of the Company’s cost method equity investments are in Federal Home Loan Bank and Federal Reserve Bank stock, for which the carrying amounts approximate fair value and are classified within Level 2. Investments in private equity and other limited partnership funds are estimated using fund provided net asset values. These equity investments are classified within Level 3. The community development and tax-advantaged related asset balances primarily represent the underlying assets of consolidated community development and tax-advantaged entities. The community development and tax-advantaged related liabilities represent the underlying liabilities of the consolidated entities (included in long-term debt) and liabilities related to other third party interests (included in other liabilities). The carrying value of the community development and tax-advantaged related asset and other liability balances are a reasonable estimate of fair value and are classified within Level 3. Refer to Note 4 for further information on community development and tax-advantaged related assets and liabilities. Fair value is provided for disclosure purposes only.
	Deposit Liabilities The fair value of demand deposits, savings accounts and certain money market deposits is equal to the amount payable on demand. The fair value of fixed-rate certificates of deposit was estimated by discounting the contractual cash flow using current market rates. Deposit liabilities are classified within Level 2. Fair value is provided for disclosure purposes only.
	Short-term Borrowings Federal funds purchased, securities sold under agreements to repurchase, commercial paper and other short-term funds borrowed have floating rates or short-term maturities. The fair value of short-term borrowings was determined by discounting contractual cash flows using current market rates. Short-term borrowings are classified within Level 2. Included in short-term borrowings is the Company’s obligation on securities sold short, which is required to be accounted for at fair value per applicable accounting guidance. Fair value for other short-term borrowings is provided for disclosure purposes only.
	Long-term Debt The fair value for most long-term debt was determined by discounting contractual cash flows using current market rates. Junior subordinated debt instruments were valued using market quotes. Long-term debt is classified within Level 2. Fair value is provided for disclosure purposes only.
	Loan Commitments, Letters of Credit and Guarantees The fair value of commitments, letters of credit and guarantees represents the estimated costs to terminate or otherwise settle the obligations with a third party. Other loan commitments, letters of credit and guarantees are not actively traded, and the Company estimates their fair value based on the related amount of unamortized deferred commitment fees adjusted for the probable losses for these arrangements. These arrangements are classified within Level 3. Fair value is provided for disclosure purposes only.
	Significant Unobservable Inputs of Level 3 Assets and Liabilities
	The following section provides information on the significant inputs used by the Company to determine the fair value measurements of Level 3 assets and liabilities recorded at fair value on the Consolidated Balance Sheet. In addition, the following section includes a discussion of the sensitivity of the fair value measurements to changes in the significant inputs and a description of any interrelationships between these inputs for Level 3 assets and liabilities recorded at fair value on a recurring basis. The discussion below excludes nonrecurring fair value measurements of collateral value used for impairment measures for loans and other real estate owned. These valuations utilize third party appraisal or broker price opinions, and are classified as Level 3 due to the significant judgment involved.
	Available-For-Sale Investment Securities The significant unobservable inputs used in the fair value measurement of the Company’s modeled Level 3 available-for-sale investment securities are prepayment rates, probability of default and loss severities associated with the underlying collateral, as well as the discount margin used to calculate the present value of the projected cash flows. Increases in prepayment rates for Level 3 securities will typically result in higher fair values, as increased prepayment rates accelerate the receipt of expected cash flows and reduce exposure to credit losses. Increases in the probability of default and loss severities will result in lower fair values, as these increases reduce expected cash flows. Discount margin is the Company’s estimate of the current market spread above the respective benchmark rate. Higher discount margin will result in lower fair values, as it reduces the present value of the expected cash flows.
	Prepayment rates generally move in the opposite direction of market interest rates. In the current environment, an increase in the probability of default will generally be accompanied with an increase in loss severity, as both are impacted by underlying collateral values. Discount margins are influenced by market expectations about the security’s collateral performance, and therefore may directionally move with probability and severity of default; however, discount margins are also impacted by broader market forces, such as competing investment yields, sector liquidity, economic news, and other macroeconomic factors.
	The following table shows the significant valuation assumption ranges for Level 3 available-for-sale investment securities at March 31, 2014:
			Minimum			Maximum			Average
	Residential Prime Non-Agency Mortgage-Backed Securities (a)
	Estimated lifetime prepayment rates			6	%		25	%		14	%
	Lifetime probability of default rates			–			7			4
	Lifetime loss severity rates			15			75			40
	Discount margin			2			5			3
	Residential Non-Prime Non-Agency Mortgage-Backed Securities (b)
	Estimated lifetime prepayment rates			2	%		10	%		6	%
	Lifetime probability of default rates			4			12			7
	Lifetime loss severity rates			15			70			53
	Discount margin			1			5			3
	Other Asset-Backed Securities
	Estimated lifetime prepayment rates			6	%		6	%		6	%
	Lifetime probability of default rates			5			5			5
	Lifetime loss severity rates			40			40			40
	Discount margin			7			7			7
	(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
	(b)	Includes all securities not meeting the conditions to be designated as prime.
	Mortgage Servicing Rights The significant unobservable inputs used in the fair value measurement of the Company’s MSRs are expected prepayments and the discount rate used to calculate the present value of the projected cash flows. Significant increases in either of these inputs in isolation would result in a significantly lower fair value measurement. Significant decreases in either of these inputs in isolation would result in a significantly higher fair value measurement. There is no direct interrelationship between prepayments and discount rate. Prepayment rates generally move in the opposite direction of market interest rates. Discount rates are generally impacted by changes in market return requirements.
	The following table shows the significant valuation assumption ranges for MSRs at March 31, 2014:
			Minimum			Maximum			Average
	Expected prepayment			10	%		20	%		11	%
	Discount rate			10			14			10
	Derivatives The Company has two distinct Level 3 derivative portfolios: (i) the Company’s commitments to purchase and originate mortgage loans that meet the requirements of a derivative, and (ii) the Company’s asset/liability and customer-related derivatives that are Level 3 due to unobservable inputs related to measurement of risk of nonperformance by the counterparty.
	The significant unobservable inputs used in the fair value measurement of the Company’s derivative commitments to sell, purchase and originate mortgage loans are the percentage of commitments that actually become a closed loan and the MSR value that is inherent in the underlying loan value. A significant increase in the rate of loans that close would result in a larger derivative asset or liability. A significant increase in the inherent MSR value would result in an increase in the derivative asset or a reduction in the derivative liability. Expected loan close rates and the inherent MSR values are directly impacted by changes in market rates and will generally move in the same direction as interest rates.
	The following table shows the significant valuation assumption ranges for the Company’s derivative commitments to sell, purchase and originate mortgage loans at March 31, 2014:
			Minimum			Maximum			Average
	Expected loan close rate			43	%		100	%		76	%
	Inherent MSR value (basis points per loan)			48			209			126
	The significant unobservable input used in the fair value measurement of certain of the Company’s asset/liability and customer-related derivatives is the credit valuation adjustment related to the risk of counterparty nonperformance. A significant increase in the credit valuation adjustment would result in a lower fair value measurement. A significant decrease in the credit valuation adjustment would result in a higher fair value measurement. The credit valuation adjustment is impacted by changes in the Company’s assessment of the counterparty’s credit position. At March 31, 2014, the minimum, maximum and average credit valuation adjustment as a percentage of the derivative contract fair value prior to adjustment was 0 percent, 100 percent and 7 percent, respectively.
	The following table summarizes the balances of assets and liabilities measured at fair value on a recurring basis:
	(Dollars in Millions)		Level 1			Level 2			Level 3			Netting			Total
March 31, 2014
Available-for-sale securities
U.S. Treasury and agencies		$	7		$	1,055		$	–		$	–		$	1,062
Mortgage-backed securities
Residential
Agency			–			35,484			–			–			35,484
Non-agency
Prime (a)			–			–			465			–			465
Non-prime (b)			–			–			297			–			297
Commercial
Agency			–			144			–			–			144
Asset-backed securities
Collateralized debt obligations/Collateralized loan obligations			–			24			–			–			24
Other			–			563			65			–			628
Obligations of state and political subdivisions			–			5,585			–			–			5,585
Obligations of foreign governments			–			6			–			–			6
Corporate debt securities			–			661			9			–			670
Perpetual preferred securities			–			218			–			–			218
Other investments			159			19			–			–			178
Total available-for-sale			166			43,759			836			–			44,761
Mortgage loans held for sale			–			1,827			–			–			1,827
Mortgage servicing rights			–			–			2,618			–			2,618
Derivative assets			–			742			542			(470	)		814
Other assets			118			856			–			–			974
Total		$	284		$	47,184		$	3,996		$	(470	)	$	50,994
Derivative liabilities		$	–		$	1,503		$	60		$	(1,138	)	$	425
Short-term borrowings (c)			75			599			–			–			674
Total		$	75		$	2,102		$	60		$	(1,138	)	$	1,099
December 31, 2013
Available-for-sale securities
U.S. Treasury and agencies		$	7		$	1,038		$	–		$	–		$	1,045
Mortgage-backed securities
Residential
Agency			–			31,553			–			–			31,553
Non-agency
Prime (a)			–			–			478			–			478
Non-prime (b)			–			–			297			–			297
Commercial
Agency			–			152			–			–			152
Asset-backed securities
Collateralized debt obligations/Collateralized loan obligations			–			24			–			–			24
Other			–			566			63			–			629
Obligations of state and political subdivisions			–			5,738			–			–			5,738
Obligations of foreign governments			–			6			–			–			6
Corporate debt securities			–			631			9			–			640
Perpetual preferred securities			–			212			–			–			212
Other investments			141			20			–			–			161
Total available-for-sale			148			39,940			847			–			40,935
Mortgage loans held for sale			–			3,263			–			–			3,263
Mortgage servicing rights			–			–			2,680			–			2,680
Derivative assets			–			889			515			(599	)		805
Other assets			143			588			–			–			731
Total		$	291		$	44,680		$	4,042		$	(599	)	$	48,414
Derivative liabilities		$	–		$	1,647		$	70		$	(1,192	)	$	525
Short-term borrowings (c)			112			551			–			–			663
Total		$	112		$	2,198		$	70		$	(1,192	)	$	1,188
(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
(b)	Includes all securities not meeting the conditions to be designated as prime.
(c)	Represents the Company’s obligation on securities sold short required to be accounted for at fair value per applicable accounting guidance.
The following table presents the changes in fair value for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31:
(Dollars in Millions)		Beginning			Net Gains			Net Gains			Purchases			Sales			Principal			Issuances			Settlements			End		Net Change in
		of Period			(Losses)			(Losses)									Payments									of		Unrealized
		Balance			Included in			Included in																		Period		Gains (Losses)
					Net Income			Other																		Balance		Relating to
								Comprehensive																				Assets and
								Income (Loss)																				Liabilities
																												Still Held at
																												End of Period
2014
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	478		$	–		$	7		$	–		$	–		$	(20	)	$	–		$	–		$	465	$	7
Non-prime (b)			297			(1	)		7			–			–			(6	)		–			–			297		7
Asset-backed securities
Other			63			1			1			2			–			(2	)		–			–			65		1
Corporate debt securities			9			–			–			–			–			–			–			–			9		–
Total available-for-sale			847			–			15	(e)		2			–			(28	)		–			–			836		15
Mortgage servicing rights			2,680			(147	)(c)		–			1			–			–			84	(f)		–			2,618		(147	)(c)
Net derivative assets and liabilities			445			185	(d)		–			1			–			–			–			(149	)		482		60	(g)
2013
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	624		$	(2	)	$	11		$	–		$	–		$	(34	)	$	–		$	–		$	599	$	11
Non-prime (b)			355			(7	)		14			–			–			(12	)		–			–			350		14
Asset-backed securities
Other			15			1			–			25			–			(1	)		–			–			40		–
Corporate debt securities			9			–			–			–			–			–			–			–			9		–
Total available-for-sale			1,003			(8	)(h)		25	(e)		25			–			(47	)		–			–			998		25
Mortgage servicing rights			1,700			(1	)(c)		–			2			–			–			254	(f)		–			1,955		(1	)(c)
Net derivative assets and liabilities			1,179			147	(i)		–			1			(1	)		–			–			(340	)		986		71	(j)
(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
(b)	Includes all securities not meeting the conditions to be designated as prime.
(c)	Included in mortgage banking revenue.
(d)	Approximately $81 million included in other noninterest income and $104 million included in mortgage banking revenue.
(e)	Included in changes in unrealized gains and losses on securities available-for-sale.
(f)	Represents MSRs capitalized during the period.
(g)	Approximately $21 million included in other noninterest income and $39 million included in mortgage banking revenue.
(h)	Approximately $(7) million included in securities gains (losses) and $(1) million included in interest income.
(i)	Approximately $(3) million included in other noninterest income and $150 million included in mortgage banking revenue.
(j)	Approximately $(88) million included in other noninterest income and $159 million included in mortgage banking revenue.
The Company is also required periodically to measure certain other financial assets at fair value on a nonrecurring basis. These measurements of fair value usually result from the application of lower-of-cost-or-fair value accounting or write-downs of individual assets.
The following table summarizes the balances of assets measured at fair value on a nonrecurring basis:
		March 31, 2014												December 31, 2013
(Dollars in Millions)		Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3			Total
Loans (a)		$	–		$	–		$	67		$	67		$	–		$	–		$	128		$	128
Other assets (b)			–			–			51			51			–			–			150			150
(a)	Represents the carrying value of loans for which adjustments were based on the fair value of the collateral, excluding loans fully charged-off.
(b)	Primarily represents the fair value of foreclosed properties that were measured at fair value based on an appraisal or broker price opinion of the collateral subsequent to their initial acquisition.
The following table summarizes losses recognized related to nonrecurring fair value measurements of individual assets or portfolios for the three months ended March 31:
(Dollars in Millions)		2014			2013
Loans (a)		$	16		$	21
Other assets (b)			19			39
(a)	Represents write-downs of loans which were based on the fair value of the collateral, excluding loans fully charged-off.
(b)	Primarily represents related losses of foreclosed properties that were measured at fair value subsequent to their initial acquisition.
Fair Value Option
The following table summarizes the differences between the aggregate fair value carrying amount of MLHFS for which the fair value option has been elected and the aggregate unpaid principal amount that the Company is contractually obligated to receive at maturity:
		March 31, 2014									December 31, 2013
(Dollars in Millions)		Fair Value			Aggregate			Carrying			Fair Value			Aggregate			Carrying
		Carrying			Unpaid			Amount Over			Carrying			Unpaid			Amount Over
		Amount			Principal			(Under) Unpaid			Amount			Principal			(Under) Unpaid
								Principal									Principal
Total loans		$	1,827		$	1,764		$	63		$	3,263		$	3,195		$	68
Nonaccrual loans			10			15			(5	)		9			14			(5	)
Loans 90 days or more past due			2			2			–			–			–			–
Disclosures about Fair Value of Financial Instruments
The following table summarizes the estimated fair value for financial instruments as of March 31, 2014 and December 31, 2013, and includes financial instruments that are not accounted for at fair value. In accordance with disclosure guidance related to fair values of financial instruments, the Company did not include assets and liabilities that are not financial instruments, such as the value of goodwill, long-term relationships with deposit, credit card, merchant processing and trust customers, other purchased intangibles, premises and equipment, deferred taxes and other liabilities. Additionally, in accordance with the disclosure guidance, insurance contracts and investments accounted for under the equity method are excluded.
The estimated fair values of the Company’s financial instruments are shown in the table below:
		March 31, 2014															December 31, 2013
		Carrying			Fair Value												Carrying			Fair Value
(Dollars in Millions)		Amount			Level 1			Level 2			Level 3			Total			Amount			Level 1			Level 2			Level 3		Total
Financial Assets
Cash and due from banks		$	7,408		$	7,408		$	–		$	–		$	7,408		$	8,477		$	8,477		$	–		$	–	$	8,477
Federal funds sold and securities purchased under resale agreements			56			–			56			–			56			163			–			163			–		163
Investment securities held-to-maturity			40,712			1,443			38,847			99			40,389			38,920			2,589			35,678			101		38,368
Loans held for sale (a)			16			–			–			16			16			5			–			–			5		5
Loans (b)			234,119			–			–			235,218			235,218			230,857			–			–			231,480		231,480
Other financial instruments			2,307			–			954			1,364			2,318			2,443			–			1,080			1,383		2,463
Financial Liabilities
Deposits			260,612			–			260,623			–			260,623			262,123			–			262,200			–		262,200
Short-term borrowings (c)			30,107			–			30,001			–			30,001			26,945			–			26,863			–		26,863
Long-term debt			23,774			–			24,127			–			24,127			20,049			–			20,391			–		20,391
Other liabilities			1,253			–			–			1,253			1,253			1,263			–			–			1,263		1,263
(a)	Excludes mortgages held for sale for which the fair value option under applicable accounting guidance was elected.
(b)	Excludes loans measured at fair value on a nonrecurring basis.
(c)	Excludes the Company’s obligation on securities sold short required to be accounted for at fair value per applicable accounting guidance.
The fair value of unfunded commitments, standby letters of credit and other guarantees is approximately equal to their carrying value. The carrying value of unfunded commitments and standby letters of credit was $399 million and $382 million at March 31, 2014 and December 31, 2013, respectively. The carrying value of other guarantees was $275 million and $278 million at March 31, 2014 and December 31, 2013, respectively.

Guarantees_and_Contingent_Liab

Guarantees and Contingent Liabilities	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Guarantees and Contingent Liabilities	'
	Note 14		Guarantees and Contingent Liabilities
	Visa Restructuring and Card Association Litigation The Company’s payment services business issues and acquires credit and debit card transactions through the Visa U.S.A. Inc. card association or its affiliates (collectively “Visa”). In 2007, Visa completed a restructuring and issued shares of Visa Inc. common stock to its financial institution members in contemplation of its initial public offering (“IPO”) completed in the first quarter of 2008 (the “Visa Reorganization”). As a part of the Visa Reorganization, the Company received its proportionate number of shares of Visa Inc. common stock, which were subsequently converted to Class B shares of Visa Inc. (“Class B shares”). Visa U.S.A. Inc. (“Visa U.S.A.”) and MasterCard International (collectively, the “Card Associations”) are defendants in antitrust lawsuits challenging the practices of the Card Associations (the “Visa Litigation”). Visa U.S.A. member banks have a contingent obligation to indemnify Visa Inc. under the Visa U.S.A. bylaws (which were modified at the time of the restructuring in October 2007) for potential losses arising from the Visa Litigation. The indemnification by the Visa U.S.A. member banks has no specific maximum amount.
	Using proceeds from its IPO and through reductions to the conversion ratio applicable to the Class B shares held by Visa U.S.A. member banks, Visa Inc. has funded an escrow account for the benefit of member financial institutions to fund their indemnification obligations associated with the Visa Litigation. The receivable related to the escrow account is classified in other liabilities as a direct offset to the related Visa Litigation contingent liability. On October 19, 2012, Visa signed a settlement agreement to resolve class action claims associated with the multi-district interchange litigation, the largest of the remaining Visa Litigation matters. The settlement has been approved by the court, but has been challenged by some class members and is being appealed. In addition, a number of class members opted out of the settlement and have filed actions against the Card Associations. At March 31, 2014, the carrying amount of the Company’s liability related to the Visa Litigation matters, net of its share of the escrow fundings, was $24 million and included the Company’s estimate of its remaining share of the temporary reduction in interchange rates specified in the settlement agreement. The remaining Class B shares held by the Company will be eligible for conversion to Class A shares, and thereby become marketable, upon final settlement of the Visa Litigation. These shares are excluded from the Company’s financial instruments disclosures included in Note 13.
	Other Guarantees and Contingent Liabilities
	The following table is a summary of other guarantees and contingent liabilities of the Company at March 31, 2014:
	(Dollars in Millions)		Collateral			Carrying			Maximum
			Held			Amount			Potential
									Future
									Payments
	Standby letters of credit		$	–		$	69		$	16,638
	Third-party borrowing arrangements			–			–			16
	Securities lending indemnifications			5,008			–			4,902
	Asset sales			–			183			3,786	(a)
	Merchant processing			839			71			85,817
	Contingent consideration arrangements			–			11			12
	Tender option bond program guarantee			4,455			–			4,349
	Minimum revenue guarantees			–			10			10
	Other			–			–			374
	(a)	The maximum potential future payments do not include loan sales where the Company provides standard representation and warranties to the buyer against losses related to loan underwriting documentation defects that may have existed at the time of sale that generally are identified after the occurrence of a triggering event such as delinquency. For these types of loan sales, the maximum potential future payments is generally the unpaid principal balance of loans sold measured at the end of the current reporting period. Actual losses will be significantly less than the maximum exposure, as only a fraction of loans sold will have a representation and warranty breach, and any losses on repurchase would generally be mitigated by any collateral held against the loans.
	Merchant Processing The Company, through its subsidiaries, provides merchant processing services. Under the rules of credit card associations, a merchant processor retains a contingent liability for credit card transactions processed. This contingent liability arises in the event of a billing dispute between the merchant and a cardholder that is ultimately resolved in the cardholder’s favor. In this situation, the transaction is “charged-back” to the merchant and the disputed amount is credited or otherwise refunded to the cardholder. If the Company is unable to collect this amount from the merchant, it bears the loss for the amount of the refund paid to the cardholder.
	The Company currently processes card transactions in the United States, Canada, Europe, Mexico and Brazil through wholly-owned subsidiaries and joint ventures with other financial institutions. In the event a merchant was unable to fulfill product or services subject to delayed delivery, such as airline tickets, the Company could become financially liable for refunding tickets purchased through the credit card associations under the charge-back provisions. Charge-back risk related to these merchants is evaluated in a manner similar to credit risk assessments and, as such, merchant processing contracts contain various provisions to protect the Company in the event of default. At March 31, 2014, the value of airline tickets purchased to be delivered at a future date was $8.6 billion. The Company held collateral of $690 million in escrow deposits, letters of credit and indemnities from financial institutions, and liens on various assets.
	Asset Sales The Company regularly sells loans to GSEs as part of its mortgage banking activities. The Company provides customary representation and warranties to the GSEs in conjunction with these sales. These representations and warranties generally require the Company to repurchase assets if it is subsequently determined that a loan did not meet specified criteria, such as a documentation deficiency or rescission of mortgage insurance. If the Company is unable to cure or refute a repurchase request, the Company is generally obligated to repurchase the loan or otherwise reimburse the counterparty for losses. At March 31, 2014, the Company had reserved $75 million for potential losses from representation and warranty obligations, compared with $83 million at December 31, 2013. The Company’s reserve reflects management’s best estimate of losses for representation and warranty obligations. The Company’s repurchase reserve is modeled at the loan level, taking into consideration the individual credit quality and borrower activity that has transpired since origination. The model applies credit quality and economic risk factors to derive a probability of default and potential repurchase that are based on the Company’s historical loss experience, and estimates loss severity based on expected collateral value. The Company also considers qualitative factors that may result in anticipated losses differing from historical loss trends.
	The following table is a rollforward of the Company’s representation and warranty reserve:
			Three Months Ended
			March 31,
	(Dollars in Millions)		2014			2013
	Balance at beginning of period		$	83		$	240
	Net realized losses			(10	)		(23	)
	Additions to reserve			2			16
	Balance at end of period		$	75		$	233
	As of March 31, 2014 and December 31, 2013, the Company had $44 million and $89 million, respectively, of unresolved representation and warranty claims from the GSEs. The Company does not have a significant amount of unresolved claims from investors other than the GSEs.
	Litigation and Regulatory Matters The Company is subject to various litigation and regulatory matters that arise in the ordinary course of its business. The Company establishes reserves for such matters when potential losses become probable and can be reasonably estimated. The Company believes the ultimate resolution of existing legal and regulatory matters will not have a material adverse effect on the financial condition, results of operations or cash flows of the Company. However, changes in circumstances or additional information could result in additional accruals or resolution in excess of established accruals, which could adversely affect the Company’s results from operations, potentially materially.
	Certain federal and state governmental authorities reached settlement agreements in 2012 and 2013 with other major financial institutions regarding their mortgage origination, servicing, and foreclosure activities. Those governmental authorities have had settlement discussions with other financial institutions, including the Company. The Company has not agreed to any settlement; however, if a settlement were reached it would likely include an agreement to comply with specified servicing standards, and settlement payments to governmental authorities as well as a monetary commitment that could be satisfied under various loan modification programs (in addition to the programs the Company already has in place).
	The Company is currently subject to other investigations and examinations by government agencies and bank regulators concerning mortgage-related practices, including those related to origination and servicing practices for Federal Housing Administration (“FHA”) insured residential home loans, compliance with selling guidelines relating to residential home loans sold to GSEs, and various practices related to lender-placed insurance. Regarding FHA loan origination, the U.S. Department of Housing and Urban Development Office of Inspector General and the U.S. Department of Justice are investigating the Company’s compliance with FHA insurance program requirements. The Company is cooperating fully with these examinations and investigations, any of which could lead to administrative or legal proceedings or settlements. Remedies in these proceedings or settlements may include fines, penalties, restitution or alterations in the Company’s business practices (which may increase the Company’s operating expenses).
	Due to their complex nature, it can be years before litigation and regulatory matters are resolved. For those litigation and regulatory matters where the Company has information to develop an estimate or range of loss, the Company believes the upper end of reasonably possible losses in aggregate, in excess of any reserves established for matters where a loss is considered probable, is approximately $200 million. This estimate is subject to significant judgment and uncertainties and the matters underlying the estimate will change from time to time. Actual results may vary significantly from the current estimates.
	For additional information on the nature of the Company’s guarantees and contingent liabilities, refer to Note 22 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Note 15	Subsequent Events
	The Company has evaluated the impact of events that have occurred subsequent to March 31, 2014 through the date the consolidated financial statements were filed with the United States Securities and Exchange Commission. Based on this evaluation, the Company has determined none of these events were required to be recognized or disclosed in the consolidated financial statements and related notes.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	The accompanying consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States. In the opinion of management of U.S. Bancorp (the “Company”), all adjustments (consisting only of normal recurring adjustments) necessary for a fair statement of results for the interim periods have been made. These financial statements and notes should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. Certain amounts in prior periods have been reclassified to conform to the current presentation.
	Accounting policies for the lines of business are generally the same as those used in preparation of the consolidated financial statements with respect to activities specifically attributable to each business line. However, the preparation of business line results requires management to establish methodologies to allocate funding costs, expenses and other financial elements to each line of business. Table 10 “Line of Business Financial Performance” included in Management’s Discussion and Analysis provides details of segment results. This information is incorporated by reference into these Notes to Consolidated Financial Statements.
Accounting for Investments in Qualified Affordable Housing Projects	'In January 2014, the Financial Accounting Standards Board issued accounting guidance for qualified affordable housing projects. This new guidance permits the Company to present the expense on certain qualified affordable housing investments in tax expense rather than noninterest expense. The Company adopted this guidance January 1, 2014, on a prospective basis, because the impact on prior financial statements was not material.

Basis_of_Presentation_Tables

Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Line of Business Financial Performance	'
	Table 10		Line of Business Financial Performance
			Wholesale Banking and												Consumer and Small
			Commercial Real Estate												Business Banking
	Three Months Ended March 31		2014				2013				Percent				2014				2013				Percent
	(Dollars in Millions)										Change												Change
	Condensed Income Statement
	Net interest income (taxable-equivalent basis)		$	490			$	494				(.8	)%		$	1,090			$	1,163				(6.3	)%
	Noninterest income			246				280				(12.1	)			625				787				(20.6	)
	Securities gains (losses), net			–				–				–				–				–				–
	Total net revenue			736				774				(4.9	)			1,715				1,950				(12.1	)
	Noninterest expense			301				306				(1.6	)			1,116				1,132				(1.4	)
	Other intangibles			1				2				(50.0	)			8				11				(27.3	)
	Total noninterest expense			302				308				(1.9	)			1,124				1,143				(1.7	)
	Income before provision and income taxes			434				466				(6.9	)			591				807				(26.8	)
	Provision for credit losses			(18	)			(36	)			50				133				228				(41.7	)
	Income before income taxes			452				502				(10.0	)			458				579				(20.9	)
	Income taxes and taxable-equivalent adjustment			164				183				(10.4	)			167				211				(20.9	)
	Net income			288				319				(9.7	)			291				368				(20.9	)
	Net (income) loss attributable to noncontrolling interests			–				–				–				–				–				–
	Net income attributable to U.S. Bancorp		$	288			$	319				(9.7	)		$	291			$	368				(20.9	)
	Average Balance Sheet
	Commercial		$	54,491			$	49,133				10.9	%		$	8,333			$	8,499				(2.0	)%
	Commercial real estate			20,566				18,988				8.3				18,623				17,463				6.6
	Residential mortgages			22				29				(24.1	)			50,296				44,499				13
	Credit card			–				–				–				–				–				–
	Other retail			4				8				(50.0	)			45,484				44,922				1.3
	Total loans, excluding covered loans			75,083				68,158				10.2				122,736				115,383				6.4
	Covered loans			245				466				(47.4	)			6,048				6,928				(12.7	)
	Total loans			75,328				68,624				9.8				128,784				122,311				5.3
	Goodwill			1,604				1,604				–				3,515				3,515				–
	Other intangible assets			21				27				(22.2	)			2,741				2,015				36
	Assets			82,249				74,720				10.1				141,694				140,229				1
	Noninterest-bearing deposits			32,218				29,908				7.7				21,945				21,352				2.8
	Interest checking			10,472				10,886				(3.8	)			34,851				32,386				7.6
	Savings products			17,128				11,902				43.9				48,060				45,570				5.5
	Time deposits			18,385				16,472				11.6				18,708				22,444				(16.6	)
	Total deposits			78,203				69,168				13.1				123,564				121,752				1.5
	Total U.S. Bancorp shareholders’ equity			7,527				7,150				5.3				11,569				12,040				(3.9	)
	Wealth Management and												Payment												Treasury and								Consolidated
	Securities Services												Services												Corporate Support								Company
	2014				2013				Percent				2014				2013				Percent				2014			2013		Percent			2014			2013		Percent
									Change												Change									Change								Change
	$	83			$	88				(5.7	)%		$	414			$	388				6.7	%		$	629		$	576		9.2	%	$	2,706		$	2,709		(.1	)%
		330				294				12.2				775				747				3.7				127			52		*			2,103			2,160		(2.6	)
		–				–				–				–				–				–				5			5		–			5			5		–
		413				382				8.1				1,189				1,135				4.8				761			633		20.2			4,814			4,874		(1.2	)
		332				320				3.8				577				551				4.7				169			104		62.5			2,495			2,413		3.4
		9				9				–				31				35				(11.4	)			–			–		–			49			57		(14.0	)
		341				329				3.6				608				586				3.8				169			104		62.5			2,544			2,470		3
		72				53				35.8				581				549				5.8				592			529		11.9			2,270			2,404		(5.6	)
		(4	)			–				*				201				205				(2.0	)			(6	)		6		*			306			403		(24.1	)
		76				53				43.4				380				344				10.5				598			523		14.3			1,964			2,001		(1.8	)
		28				19				47.4				138				125				10.4				55			76		(27.6	)		552			614		(10.1	)
		48				34				41.2				242				219				10.5				543			447		21.5			1,412			1,387		1.8
		–				–				–				(9	)			(9	)			–				(6	)		50		*			(15	)		41		*
	$	48			$	34				41.2			$	233			$	210				11			$	537		$	497		8		$	1,397		$	1,428		(2.2	)
	$	1,842			$	1,617				13.9	%		$	5,997			$	5,860				2.3	%		$	171		$	190		(10.0	)%	$	70,834		$	65,299		8.5	%
		616				655				(6.0	)			–				–				–				245			112		*			40,050			37,218		7.6
		1,265				580				*				–				–				–				1			1		–			51,584			45,109		14.4
		–				–				–				17,407				16,528				5.3				–			–		–			17,407			16,528		5.3
		1,472				1,553				(5.2	)			697				763				(8.7	)			–			–		–			47,657			47,246		0.9
		5,195				4,405				17.9				24,101				23,151				4.1				417			303		37.6			227,532			211,400		7.6
		7				9				(22.2	)			5				5				–				2,022			3,613		(44.0	)		8,327			11,021		(24.4	)
	5,202				4,414				17.9				24,106				23,156				4.1				2,439			3,916		(37.7	)		235,859			222,421		6
	1,565				1,528				2.4				2,519				2,508				0.4				–			–		–			9,203			9,155		0.5
	171				182				(6.0	)			507				612				(17.2	)			1			2		(50.0	)		3,441			2,838		21.2
	8,217				7,286				12.8				30,372				29,444				3.2				101,780			99,708		2.1			364,312			351,387		3.7
	14,713				14,106				4.3				698				692				0.9				1,250			342		*			70,824			66,400		6.7
	5,441				4,701				15.7				540				430				25.6				1			1		–			51,305			48,404		6
	27,084				26,890				0.7				70				47				48.9				102			96		6.3			92,444			84,505		9.4
	4,165				5,961				(30.1	)			–				–				–				1,648			832		98.1			42,906			45,709		(6.1	)
	51,403				51,658				(.5	)			1,308				1,169				11.9				3,001			1,271		*			257,479			245,018		5.1
	2,296				2,359				(2.7	)			5,669				5,961				(4.9	)			14,700			11,667		26			41,761			39,177		6.6
*	Not meaningful

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2014
Investments Debt And Equity Securities [Abstract]	'
Investment Securities	'
			Available-for-Sale																Held-to-Maturity
	At March 31, 2014 (Dollars in Millions)		Amortized				Fair				Weighted-				Weighted-				Amortized				Fair				Weighted-		Weighted-
			Cost				Value				Average				Average				Cost				Value				Average		Average
											Maturity in				Yield (e)												Maturity in		Yield (e)
											Years																Years
	U.S. Treasury and Agencies
	Maturing in one year or less		$	30			$	30				0.4				4.53	%		$	650			$	651				0.2		0.96	%
	Maturing after one year through five years			31				32				2.4				3.12				80				81				1.2		1.36
	Maturing after five years through ten years			842				804				8.5				2.83				1,195				1,137				8.3		2.09
	Maturing after ten years			201				196				16.4				2.19				59				59				11.1		1.75
	Total		$	1,104			$	1,062				9.6				2.77	%		$	1,984			$	1,928				5.4		1.68	%
	Mortgage-Backed Securities (a)
	Maturing in one year or less		$	298			$	302				0.6				2.34	%		$	12			$	12				0.7		2.17	%
	Maturing after one year through five years			17,414				17,414				3.8				2.07				24,023				23,908				3.6		2.26
	Maturing after five years through ten years			16,918				16,980				5.9				1.8				13,819				13,655				5.6		1.62
	Maturing after ten years			1,692				1,694				13.2				1.2				740				752				12.1		1.24
	Total		$	36,322			$	36,390				5.2				1.91	%		$	38,594			$	38,327				4.5		2.02	%
	Asset-Backed Securities (a)
	Maturing in one year or less		$	–			$	–				–				–	%		$	–			$	–				0.1		0.38	%
	Maturing after one year through five years			272				283				3.9				1.54				11				14				3.6		0.81
	Maturing after five years through ten years			362				369				7.5				2.45				3				3				6.5		0.92
	Maturing after ten years			–				–				17.3				2.45				1				9				10		0.97
	Total		$	634			$	652				6				2.06	%		$	15			$	26				4.5		0.84	%
	Obligations of State and Political Subdivisions (b) (c)
	Maturing in one year or less		$	146			$	149				0.6				6.43	%		$	1			$	1				0.7		10.39	%
	Maturing after one year through five years			4,614				4,769				2.5				6.79				2				2				2.6		8.36
	Maturing after five years through ten years			576				577				6.7				5.15				1				1				7.9		8.03
	Maturing after ten years			96				90				22.6				5.77				7				7				11.9		2.65
	Total		$	5,432			$	5,585				3.2				6.59	%		$	11			$	11				9.1		4.78	%
	Other Debt Securities
	Maturing in one year or less		$	51			$	51				0.2				5.71	%		$	6			$	6				0.2		1.6	%
	Maturing after one year through five years			–				–				–				–				78				78				2.5		1.12
	Maturing after five years through ten years			–				–				–				–				24				13				6.6		0.98
	Maturing after ten years			690				625				19.2				2.47				–				–				–		–
	Total		$	741			$	676				17.9				2.69	%		$	108			$	97				3.3		1.12	%
	Other Investments		$	356			$	396				17.8				2.74	%		$	–			$	–				–		–	%
	Total investment securities (d)		$	44,589			$	44,761				5.4				2.52	%		$	40,712			$	40,389				4.5		2	%
	(a)	Information related to asset and mortgage-backed securities included above is presented based upon weighted-average maturities anticipating future prepayments.
	(b)	Information related to obligations of state and political subdivisions is presented based upon yield to first optional call date if the security is purchased at a premium, yield to maturity if purchased at par or a discount.
	(c)	Maturity calculations for obligations of state and political subdivisions are based on the first optional call date for securities with a fair value above par and contractual maturity for securities with a fair value equal to or below par.
	(d)	The weighted-average maturity of the available-for-sale investment securities was 6.0 years at December 31, 2013, with a corresponding weighted-average yield of 2.64 percent. The weighted-average maturity of the held-to-maturity investment securities was 4.5 years at December 31, 2013, with a corresponding weighted-average yield of 2.00 percent.
	(e)	Average yields are presented on a fully-taxable equivalent basis under a tax rate of 35 percent. Yields on available-for-sale and held-to-maturity investment securities are computed based on amortized cost balances, excluding any premiums or discounts recorded related to the transfer of investment securities at fair value from available-for-sale to held-to-maturity. Average yield and maturity calculations exclude equity securities that have no stated yield or maturity.
			March 31, 2014								December 31, 2013
	(Dollars in Millions)		Amortized				Percent				Amortized				Percent
			Cost				of Total				Cost				of Total
	U.S. Treasury and agencies		$	3,088				3.6	%		$	4,222				5.3	%
	Mortgage-backed securities			74,916				87.8				68,236				85.3
	Asset-backed securities			649				0.8				652				0.8
	Obligations of state and political subdivisions			5,443				6.4				5,685				7.1
	Other debt securities and investments			1,205				1.4				1,184				1.5
	Total investment securities		$	85,301				100	%		$	79,979				100	%
Investment Securities Held to Maturity and Available for Sale	'
	The amortized cost, other-than-temporary impairment recorded in other comprehensive income (loss), gross unrealized holding gains and losses, and fair value of held-to-maturity and available-for-sale investment securities were as follows:
			March 31, 2014																				December 31, 2013
											Unrealized Losses																		Unrealized Losses
	(Dollars in Millions)		Amortized				Unrealized				Other-than-				Other (f)				Fair				Amortized				Unrealized		Other-than-			Other (f)			Fair
			Cost				Gains				Temporary(e)								Value				Cost				Gains		Temporary(e)						Value
	Held-to-maturity (a)
	U.S. Treasury and agencies		$	1,984			$	3			$	–			$	(59	)		$	1,928			$	3,114			$	5	$	–		$	(79	)	$	3,040
	Mortgage-backed securities
	Residential
	Agency			38,593				209				–				(476	)			38,326				35,671				187		–			(665	)		35,193
	Non-agency non-prime (d)			1				–				–				–				1				1				–		–			–			1
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–				9				–				–				9				–				9		–			–			9
	Other			15				4				(1	)			(1	)			17				16				4		(1	)		(1	)		18
	Obligations of state and political subdivisions			11				–				–				–				11				12				–		–			–			12
	Obligations of foreign governments			9				–				–				–				9				7				–		–			–			7
	Other debt securities			99				–				–				(11	)			88				99				–		–			(11	)		88
	Total held-to-maturity		$	40,712			$	225			$	(1	)		$	(547	)		$	40,389			$	38,920			$	205	$	(1	)	$	(756	)	$	38,368
	Available-for-sale (b)
	U.S. Treasury and agencies		$	1,104			$	4			$	–			$	(46	)		$	1,062			$	1,108			$	4	$	–		$	(67	)	$	1,045
	Mortgage-backed securities
	Residential
	Agency			35,426				498				–				(440	)			35,484				31,633				449		–			(529	)		31,553
	Non-agency
	Prime (c)			466				7				(5	)			(3	)			465				486				4		(8	)		(4	)		478
	Non-prime (d)			290				10				(3	)			–				297				297				5		(5	)		–			297
	Commercial agency			140				4				–				–				144				148				4		–			–			152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			19				5				–				–				24				20				4		–			–			24
	Other			615				13				–				–				628				616				13		–			–			629
	Obligations of state and political subdivisions			5,432				174				–				(21	)			5,585				5,673				116		–			(51	)		5,738
	Obligations of foreign governments			6				–				–				–				6				6				–		–			–			6
	Corporate debt securities			735				–				–				(65	)			670				734				–		–			(94	)		640
	Perpetual preferred securities			205				26				–				(13	)			218				205				24		–			(17	)		212
	Other investments			151				27				–				–				178				133				28		–			–			161
	Total available-for-sale		$	44,589			$	768			$	(8	)		$	(588	)		$	44,761			$	41,059			$	651	$	(13	)	$	(762	)	$	40,935
	(a)	Held-to-maturity investment securities are carried at historical cost or at fair value at the time of transfer from the available-for-sale to held-to-maturity category, adjusted for amortization of premiums and accretion of discounts and credit-related other-than-temporary impairment.
	(b)	Available-for-sale investment securities are carried at fair value with unrealized net gains or losses reported within accumulated other comprehensive income (loss) in shareholders’ equity.
	(c)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads). When the Company determines the designation, prime securities typically have a weighted average credit score of 725 or higher and a loan-to-value of 80 percent or lower; however, other pool characteristics may result in designations that deviate from these credit score and loan-to-value thresholds.
	(d)	Includes all securities not meeting the conditions to be designated as prime.
	(e)	Represents impairment not related to credit for those investment securities that have been determined to be other-than-temporarily impaired.
	(f)	Represents unrealized losses on investment securities that have not been determined to be other-than-temporarily impaired.
Summary of Information about Amount of Interest Income from Taxable and Non-Taxable Investment Securities	'
	The following table provides information about the amount of interest income from taxable and non-taxable investment securities:
	Three Months Ended March 31		2014				2013
	(Dollars in Millions)
	Taxable		$	381			$	344
	Non-taxable			60				66
	Total interest income from investment securities		$	441			$	410
Summary of Information about Amount of Gross Gains and Losses Realized through Sales of Available-for-sale Investment Securities	'
	The following table provides information about the amount of gross gains and losses realized through the sales of available-for-sale investment securities:
	Three Months Ended March 31		2014				2013
	(Dollars in Millions)
	Realized gains		$	5			$	12
	Realized losses			–				–
	Net realized gains (losses)		$	5			$	12
	Income tax (benefit) on net realized gains (losses)		$	2			$	5
Summary of Other-than-Temporary Impairment by Investment Category	'
	The following table summarizes other-than-temporary impairment by investment category:
					2014												2013
	Three Months Ended March 31				Losses				Other Gains				Total				Losses				Other Gains				Total
	(Dollars in Millions)				Recorded in				(Losses) (c)								Recorded in				(Losses) (c)
					Earnings												Earnings
	Available-for-sale
	Mortgage-backed securities
	Non-agency residential
	Prime (a)				$	–			$	–			$	–			$	(1	)		$	1			$	–
	Non-prime (b)					–				–				–				(6	)			5				(1	)
	Total available-for-sale				$	–			$	–			$	–			$	(7	)		$	6			$	(1	)
	(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
	(b)	Includes all securities not meeting the conditions to be designated as prime.
	(c)	Losses represent the non-credit portion of other-than-temporary impairment recorded in other comprehensive income (loss) for investment securities determined to be other-than-temporarily impaired during the period. Gains represent recoveries in the fair value of securities that had non-credit other-than-temporary impairment during the period.
Summary of Ranges used in Valuation of Non-Agency Mortgage-Backed Securities Other than Temporarily Impaired	'
	The following table includes the ranges for significant assumptions used for those available-for-sale non-agency mortgage-backed securities determined to be other-than-temporarily impaired during the three months ended March 31, 2014:
			Prime (a)
			Minimum				Maximum				Average
	Estimated lifetime prepayment rates			20	%			20	%			20	%
	Lifetime probability of default rates			5				5				5
	Lifetime loss severity rates			45				45				45
	(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
Changes in Credit Losses on Debt Securities	'
	Changes in the credit losses on debt securities are summarized as follows:
	Three Months Ended March 31		2014				2013
	(Dollars in Millions)
	Balance at beginning of period		$	116			$	134
	Additions to Credit Losses Due to Other-than-temporary Impairments
	Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized			–				7
	Total other-than-temporary impairment on debt securities			–				7
	Other Changes in Credit Losses
	Increases in expected cash flows			(2	)			–
	Realized losses (a)			(3	)			(8	)
	Balance at end of period		$	111			$	133
	(a)	Primarily represents principal losses allocated to mortgage and asset-backed securities in the Company’s portfolio under the terms of the securitization transaction documents.
Schedule of Gross Unrealized Losses and Fair Value of Company's Investment Securities with Unrealized Losses	'
	At March 31, 2014, certain investment securities had a fair value below amortized cost. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at March 31, 2014:
			Less Than 12 Months								12 Months or Greater								Total
	(Dollars in Millions)		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
			Value				Losses				Value				Losses				Value				Losses
	Held-to-maturity
	U.S. Treasury and agencies		$	1,012			$	(59	)		$	–			$	–			$	1,012			$	(59	)
	Residential agency mortgage-backed securities			22,447				(432	)			1,202				(44	)			23,649				(476	)
	Other asset-backed securities			–				–				10				(2	)			10				(2	)
	Obligations of state and political subdivisions			3				–				–				–				3				–
	Other debt securities			–				–				12				(11	)			12				(11	)
	Total held-to-maturity		$	23,462			$	(491	)		$	1,224			$	(57	)		$	24,686			$	(548	)
	Available-for-sale
	U.S. Treasury and agencies		$	845			$	(41	)		$	95			$	(5	)		$	940			$	(46	)
	Mortgage-backed securities
	Residential
	Agency			14,566				(323	)			2,580				(117	)			17,146				(440	)
	Non-agency (a)
	Prime (b)			47				(1	)			175				(7	)			222				(8	)
	Non-prime (c)			33				–				44				(3	)			77				(3	)
	Other asset-backed securities			23				–				3				–				26				–
	Obligations of state and political subdivisions			441				(17	)			81				(4	)			522				(21	)
	Obligations of foreign governments			6				–				–				–				6				–
	Corporate debt securities			50				–				442				(65	)			492				(65	)
	Perpetual preferred securities			–				–				120				(13	)			120				(13	)
	Total available-for-sale		$	16,011			$	(382	)		$	3,540			$	(214	)		$	19,551			$	(596	)
	(a)	The Company has $11 million of unrealized losses on residential non-agency mortgage-backed securities. Credit-related other-than-temporary impairment on these securities may occur if there is further deterioration in the underlying collateral pool performance. Borrower defaults may increase if economic conditions worsen. Additionally, deterioration in home prices may increase the severity of projected losses.
	(b)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
	(c)	Includes all securities not meeting the conditions to be designated as prime.

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
Composition of Loan Portfolio	'
	The composition of the loan portfolio, disaggregated by class and underlying specific portfolio type, was as follows:
			March 31, 2014						December 31, 2013
	(Dollars in Millions)		Amount			Percent			Amount			Percent
						of Total						of Total
	Commercial
	Commercial		$	68,556			28.8	%	$	64,762			27.5	%
	Lease financing			5,145			2.1			5,271			2.3
	Total commercial			73,701			30.9			70,033			29.8
	Commercial Real Estate
	Commercial mortgages			31,878			13.4			32,183			13.7
	Construction and development			8,253			3.4			7,702			3.3
	Total commercial real estate			40,131			16.8			39,885			17
	Residential Mortgages
	Residential mortgages			38,316			16.1			37,545			15.9
	Home equity loans, first liens			13,392			5.6			13,611			5.8
	Total residential mortgages			51,708			21.7			51,156			21.7
	Credit Card			17,129			7.2			18,021			7.7
	Other Retail
	Retail leasing			6,009			2.5			5,929			2.5
	Home equity and second mortgages			15,261			6.4			15,442			6.6
	Revolving credit			3,187			1.3			3,276			1.4
	Installment			5,751			2.4			5,709			2.4
	Automobile			13,933			5.9			13,743			5.8
	Student			3,466			1.5			3,579			1.5
	Total other retail			47,607			20			47,678			20.2
	Total loans, excluding covered loans			230,276			96.6			226,773			96.4
	Covered Loans			8,099			3.4			8,462			3.6
	Total loans		$	238,375			100	%	$	235,235			100	%
Changes in Accretable Balance for Purchased Impaired Loans	'
	Changes in the accretable balance for purchased impaired loans were as follows:
	Three Months Ended March 31		2014			2013
	(Dollars in Millions)
	Balance at beginning of period		$	1,655		$	1,709
	Accretion			(111	)		(136	)
	Disposals			(40	)		(38	)
	Reclassifications from nonaccretable difference (a)			81			10
	Other (b)			(1	)		376
	Balance at end of period		$	1,584		$	1,921
	(a)	Primarily relates to changes in expected credit performance.
	(b)	The amount in first quarter 2013 primarily represents the reclassification of unamortized decreases in the FDIC asset (which are presented as a separate component within the covered assets table on page 52 beginning in 2013), partially offset by the impact of changes in expectations about retaining covered single-family loans beyond the term of the indemnification agreements.
Activity in Allowance for Credit Losses	'
	Activity in the allowance for credit losses by portfolio class was as follows:
	(Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
						Real Estate			Mortgages			Card			Retail			Excluding			Loans			Loans
																		Covered
																		Loans
	Balance at December 31, 2012		$	1,051		$	857		$	935		$	863		$	848		$	4,554		$	179		$	4,733
	Add
	Provision for credit losses			(4	)		(40	)		83			192			132			363			40			403
	Deduct
	Loans charged off			56			43			100			193			156			548			1			549
	Less recoveries of loans charged off			(21	)		(24	)		(8	)		(33	)		(30	)		(116	)		–			(116	)
	Net loans charged off			35			19			92			160			126			432			1			433
	Other changes (a)			–			–			–			–			–			–			5			5
	Balance at March 31, 2013		$	1,012		$	798		$	926		$	895		$	854		$	4,485		$	223		$	4,708
	Balance at December 31, 2013		$	1,075		$	776		$	875		$	884		$	781		$	4,391		$	146		$	4,537
	Add
	Provision for credit losses			52			(37	)		44			170			80			309			(3	)		306
	Deduct
	Loans charged off			63			8			61			184			100			416			6			422
	Less recoveries of loans charged off			(27	)		(11	)		(4	)		(14	)		(24	)		(80	)		(1	)		(81	)
	Net loans charged off			36			(3	)		57			170			76			336			5			341
	Other changes (a)			–			–			–			–			–			–			(5	)		(5	)
	Balance at March 31, 2014		$	1,091		$	742		$	862		$	884		$	785		$	4,364		$	133		$	4,497
	(a)	Includes net changes in credit losses to be reimbursed by the FDIC and reductions in the allowance for covered loans where the reversal of a previously recorded allowance was offset by an associated decrease in the indemnification asset.
Additional Detail of Allowance for Credit Losses and Related Loan Balances by Portfolio Type	'
	Additional detail of the allowance for credit losses by portfolio class was as follows:
	(Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
						Real Estate			Mortgages			Card			Retail			Excluding			Loans			Loans
																		Covered
																		Loans
	Allowance Balance at March 31, 2014 Related to
	Loans individually evaluated for impairment (a)		$	19		$	12		$	–		$	–		$	–		$	31		$	–		$	31
	TDRs collectively evaluated for impairment			15			20			333			77			51			496			4			500
	Other loans collectively evaluated for impairment			1,057			674			529			807			734			3,801			1			3,802
	Loans acquired with deteriorated credit quality			–			36			–			–			–			36			128			164
	Total allowance for credit losses		$	1,091		$	742		$	862		$	884		$	785		$	4,364		$	133		$	4,497
	Allowance Balance at December 31, 2013 Related to
	Loans individually evaluated for impairment (a)		$	15		$	17		$	–		$	–		$	–		$	32		$	–		$	32
	TDRs collectively evaluated for impairment			19			26			329			87			55			516			4			520
	Other loans collectively evaluated for impairment			1,041			700			546			797			726			3,810			5			3,815
	Loans acquired with deteriorated credit quality			–			33			–			–			–			33			137			170
	Total allowance for credit losses		$	1,075		$	776		$	875		$	884		$	781		$	4,391		$	146		$	4,537
	(a)	Represents the allowance for credit losses related to loans greater than $5 million classified as nonperforming or TDRs.
	Additional detail of loan balances by portfolio class was as follows:
	Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
						Real Estate			Mortgages			Card			Retail			Excluding			Loans (b)			Loans
																		Covered
																		Loans
	March 31, 2014
	Loans individually evaluated for impairment (a)		$	282		$	214		$	–		$	–		$	–		$	496		$	82		$	578
	TDRs collectively evaluated for impairment			136			327			5,142			289			263			6,157			92			6,249
	Other loans collectively evaluated for impairment			73,281			39,452			46,565			16,840			47,344			223,482			4,288			227,770
	Loans acquired with deteriorated credit quality			2			138			1			–			–			141			3,637			3,778
	Total loans		$	73,701		$	40,131		$	51,708		$	17,129		$	47,607		$	230,276		$	8,099		$	238,375
	December 31, 2013
	Loans individually evaluated for impairment (a)		$	197		$	237		$	–		$	–		$	–		$	434		$	62		$	496
	TDRs collectively evaluated for impairment			155			358			5,064			310			269			6,156			87			6,243
	Other loans collectively evaluated for impairment			69,680			39,129			46,090			17,711			47,409			220,019			4,538			224,557
	Loans acquired with deteriorated credit quality			1			161			2			–			–			164			3,775			3,939
	Total loans		$	70,033		$	39,885		$	51,156		$	18,021		$	47,678		$	226,773		$	8,462		$	235,235
	(a)	Represents loans greater than $5 million classified as nonperforming or TDRs.
	(b)	Includes expected reimbursements from the FDIC under loss sharing agreements.
Summary of Loans by Portfolio Type and Delinquency Status	'
	The following table provides a summary of loans by portfolio class, including the delinquency status of those that continue to accrue interest, and those that are nonperforming:
			Accruing
	(Dollars in Millions)		Current			30-89 Days			90 Days or			Nonperforming			Total
						Past Due			More Past Due
	March 31, 2014
	Commercial		$	73,257		$	210		$	46		$	188		$	73,701
	Commercial real estate			39,780			58			24			269			40,131
	Residential mortgages (a)			50,294			306			331			777			51,708
	Credit card			16,653			203			208			65			17,129
	Other retail			47,131			202			86			188			47,607
	Total loans, excluding covered loans			227,115			979			695			1,487			230,276
	Covered loans			7,339			156			472			132			8,099
	Total loans		$	234,454		$	1,135		$	1,167		$	1,619		$	238,375
	December 31, 2013
	Commercial		$	69,587		$	257		$	55		$	134		$	70,033
	Commercial real estate			39,459			94			29			303			39,885
	Residential mortgages (a)			49,695			358			333			770			51,156
	Credit card			17,507			226			210			78			18,021
	Other retail			47,156			245			86			191			47,678
	Total loans, excluding covered loans			223,404			1,180			713			1,476			226,773
	Covered loans			7,693			166			476			127			8,462
	Total loans		$	231,097		$	1,346		$	1,189		$	1,603		$	235,235
	(a)	At March 31, 2014, $417 million of loans 30–89 days past due and $3.6 billion of loans 90 days or more past due purchased from Government National Mortgage Association (“GNMA”) mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified as current, compared with $440 million and $3.7 billion at December 31, 2013, respectively.
Summary of Loans by Portfolio Type and Company's Internal Credit Quality Rating	'
	The following table provides a summary of loans by portfolio class and the Company’s internal credit quality rating:
						Criticized
	(Dollars in Millions)		Pass			Special			Classified (a)			Total			Total
						Mention						Criticized
	March 31, 2014
	Commercial		$	71,544		$	1,111		$	1,046		$	2,157		$	73,701
	Commercial real estate			38,520			538			1,073			1,611			40,131
	Residential mortgages (b)			50,521			4			1,183			1,187			51,708
	Credit card			16,856			–			273			273			17,129
	Other retail			47,228			24			355			379			47,607
	Total loans, excluding covered loans			224,669			1,677			3,930			5,607			230,276
	Covered loans			7,812			6			281			287			8,099
	Total loans		$	232,481		$	1,683		$	4,211		$	5,894		$	238,375
	Total outstanding commitments		$	476,506		$	2,871		$	5,086		$	7,957		$	484,463
	December 31, 2013
	Commercial		$	68,075		$	1,013		$	945		$	1,958		$	70,033
	Commercial real estate			38,113			616			1,156			1,772			39,885
	Residential mortgages (b)			50,152			5			999			1,004			51,156
	Credit card			17,733			–			288			288			18,021
	Other retail			47,313			27			338			365			47,678
	Total loans, excluding covered loans			221,386			1,661			3,726			5,387			226,773
	Covered loans			8,160			18			284			302			8,462
	Total loans		$	229,546		$	1,679		$	4,010		$	5,689		$	235,235
	Total outstanding commitments		$	470,046		$	2,939		$	4,812		$	7,751		$	477,797
	(a)	Classified rating on consumer loans primarily based on delinquency status.
	(b)	At March 31, 2014, $3.6 billion of GNMA loans 90 days or more past due and $2.7 billion of restructured GNMA loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs were classified with a pass rating, compared with $3.7 billion and $2.6 billion at December 31, 2013, respectively.
Summary of Impaired Loans by Portfolio Class	'
	A summary of impaired loans by portfolio class was as follows:
	(Dollars in Millions)		Period-end			Unpaid			Valuation			Commitments
			Recorded			Principal			Allowance			to Lend
			Investment (a)			Balance						Additional
												Funds
	March 31, 2014
	Commercial		$	452		$	879		$	35		$	37
	Commercial real estate			628			1,218			39			49
	Residential mortgages			2,739			3,645			297			–
	Credit card			289			289			77			–
	Other retail			385			433			55			4
	Total impaired loans, excluding GNMA and covered loans			4,493			6,464			503			90
	Loans purchased from GNMA mortgage pools			2,716			2,716			40			–
	Covered loans			419			920			22			3
	Total		$	7,628		$	10,100		$	565		$	93
	December 31, 2013
	Commercial		$	382		$	804		$	36		$	54
	Commercial real estate			693			1,322			51			40
	Residential mortgages			2,767			3,492			308			–
	Credit card			310			310			87			–
	Other retail			391			593			59			14
	Total impaired loans, excluding GNMA and covered loans			4,543			6,521			541			108
	Loans purchased from GNMA mortgage pools			2,607			2,607			28			–
	Covered loans			452			1,008			30			4
	Total		$	7,602		$	10,136		$	599		$	112
	(a)	Substantially all loans classified as impaired at March 31, 2014 and December 31, 2013, had an associated allowance for credit losses.
Impaired Loans Average Recorded Investment and Interest Income	'
	Additional information on impaired loans follows:
			2014						2013
	Three Months Ended March 31		Average			Interest			Average			Interest
	(Dollars in Millions)		Recorded			Income			Recorded			Income
			Investment			Recognized			Investment			Recognized
	Commercial		$	417		$	2		$	391		$	10
	Commercial real estate			660			9			1,055			11
	Residential mortgages			2,753			35			2,728			34
	Credit card			300			3			418			4
	Other retail			388			4			443			6
	Total impaired loans, excluding GNMA and covered loans			4,518			53			5,035			65
	Loans purchased from GNMA mortgage pools			2,662			33			1,844			23
	Covered loans			435			5			681			7
	Total		$	7,615		$	91		$	7,560		$	95
Loans Modified as TDRs	'
	The following table provides a summary of loans modified as TDRs during the periods presented by portfolio class:
			2014									2013
	Three Months Ended March 31		Number			Pre-Modification			Post-Modification			Number			Pre-Modification			Post-Modification
	(Dollars in Millions)		of Loans			Outstanding			Outstanding			of Loans			Outstanding			Outstanding
						Loan			Loan						Loan			Loan
						Balance			Balance						Balance			Balance
	Commercial			619		$	79		$	77			815		$	34		$	33
	Commercial real estate			15			11			8			63			80			78
	Residential mortgages			528			70			70			807			110			105
	Credit card			6,816			40			40			7,818			48			48
	Other retail			787			21			20			1,865			49			49
	Total loans, excluding GNMA and covered loans			8,765			221			215			11,368			321			313
	Loans purchased from GNMA mortgage pools			2,563			257			246			1,256			177			182
	Covered loans			13			9			8			50			53			41
	Total loans			11,341		$	487		$	469			12,674		$	551		$	536
Schedule of Loans Modified as TDRs that have Subsequently been Fully or Partially Charged-Off or Became 90 Days or More Past Due	'
	The following table provides a summary of TDR loans that defaulted (fully or partially charged-off or became 90 days or more past due) during the periods presented that were modified as TDRs within 12 months previous to default:
			2014						2013
	Three Months Ended March 31		Number			Amount			Number			Amount
	(Dollars in Millions)		of Loans			Defaulted			of Loans			Defaulted
	Commercial			145		$	5			168		$	2
	Commercial real estate			6			7			19			28
	Residential mortgages			148			22			183			31
	Credit card			1,461			8			1,986			11
	Other retail			185			6			517			28
	Total loans, excluding GNMA and covered loans			1,945			48			2,873			100
	Loans purchased from GNMA mortgage pools			71			10			3,822			478
	Covered loans			8			3			10			3
	Total loans			2,024		$	61			6,705		$	581
Carrying Amount of Covered Assets	'
	The carrying amount of the covered assets consisted of purchased impaired loans, purchased nonimpaired loans and other assets as shown in the following table:
			March 31, 2014												December 31, 2013
	(Dollars in Millions)		Purchased			Purchased			Other			Total			Purchased			Purchased			Other			Total
			Impaired			Nonimpaired			Assets						Impaired			Nonimpaired			Assets
			Loans			Loans									Loans			Loans
	Commercial loans		$	–		$	28		$	–		$	28		$	–		$	32		$	–		$	32
	Commercial real estate loans			649			1,450			–			2,099			738			1,494			–			2,232
	Residential mortgage loans			2,988			855			–			3,843			3,037			890			–			3,927
	Credit card loans			–			5			–			5			–			5			–			5
	Other retail loans			–			644			–			644			–			666			–			666
	Losses reimbursable by the FDIC (a)			–			–			772			772			–			–			798			798
	Unamortized changes in FDIC asset (b)			–			–			708			708			–			–			802			802
	Covered loans			3,637			2,982			1,480			8,099			3,775			3,087			1,600			8,462
	Foreclosed real estate			–			–			73			73			–			–			97			97
	Total covered assets		$	3,637		$	2,982		$	1,553		$	8,172		$	3,775		$	3,087		$	1,697		$	8,559
	(a)	Relates to loss sharing agreements with remaining terms up to five years.
	(b)	Represents decreases in expected reimbursements by the FDIC as a result of decreases in expected losses on the covered loans. These amounts are amortized as a reduction in interest income on covered loans over the shorter of the expected life of the respective covered loans or the remaining contractual term of the indemnification agreements.

Accounting_for_Transfers_and_S1

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)	3 Months Ended
	Mar. 31, 2014
Transfers And Servicing [Abstract]	'
Summary of Investments in Community Development and Tax-advantaged VIEs	'
	The following table provides a summary of investments in community development and tax-advantaged VIEs that the Company has not consolidated:
	(Dollars in Millions)	March 31,		December 31,
		2014		2013
	Investment carrying amount	$	4,036	$	4,178
	Unfunded capital and other commitments		1,532		1,661
	Maximum exposure to loss		7,453		7,390

Mortgage_Servicing_Rights_Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
Changes in Fair Value of Capitalized MSRs	'
	Changes in fair value of capitalized MSRs are summarized as follows:
	Three Months Ended March 31		2014			2013
	(Dollars in Millions)
	Balance at beginning of period		$	2,680		$	1,700
	Rights purchased			1			2
	Rights capitalized			84			254
	Changes in fair value of MSRs
	Due to fluctuations in market interest rates (a)			(76	)		127
	Due to revised assumptions or models (b)			12			(6	)
	Other changes in fair value (c)			(83	)		(122	)
	Balance at end of period		$	2,618		$	1,955
	(a)	Includes changes in MSR value associated with changes in market interest rates, including estimated prepayment rates and anticipated earnings on escrow deposits.
	(b)	Includes changes in MSR value not caused by changes in market interest rates, such as changes in cost to service, ancillary income, and discount rate, as well as the impact of any model changes.
	(c)	Primarily represents changes due to realization of expected cash flows over time (decay).
Sensitivity to Changes in Interest Rates to Fair Value of MSR's Portfolio and Related Derivative Instruments	'
	The estimated sensitivity to changes in interest rates of the fair value of the MSRs portfolio and the related derivative instruments was as follows:
			March 31, 2014																		December 31, 2013
	(Dollars in Millions)		Down			Down			Down			Up			Up			Up			Down			Down			Down			Up			Up			Up
			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps
	MSR portfolio		$	(463	)	$	(210	)	$	(97	)	$	85		$	159		$	297		$	(435	)	$	(199	)	$	(93	)	$	82		$	154		$	287
	Derivative instrument hedges			409			201			96			(84	)		(156	)		(287	)		399			194			91			(82	)		(157	)		(301	)
	Net sensitivity		$	(54	)	$	(9	)	$	(1	)	$	1		$	3		$	10		$	(36	)	$	(5	)	$	(2	)	$	–		$	(3	)	$	(14	)
MSRs and Related Characteristics by Portfolio	'
	A summary of the Company’s MSRs and related characteristics by portfolio was as follows:
			March 31, 2014												December 31, 2013
	(Dollars in Millions)		MRBP			Government			Conventional (b)			Total			MRBP			Government			Conventional (b)			Total
	Servicing portfolio		$	16,459		$	41,550		$	166,628		$	224,637		$	15,896		$	41,659		$	169,287		$	226,842
	Fair value		$	188		$	485		$	1,945		$	2,618		$	180		$	500		$	2,000		$	2,680
	Value (bps) (a)			114			117			117			117			113			120			118			118
	Weighted-average servicing fees (bps)			39			32			29			30			39			32			29			30
	Multiple (value/servicing fees)			2.92			3.66			4.03			3.9			2.9			3.75			4.07			3.93
	Weighted-average note rate			4.67	%		4.23	%		4.16	%		4.21	%		4.7	%		4.24	%		4.17	%		4.22	%
	Weighted-average age (in years)			3.8			2.8			2.7			2.8			3.8			2.6			2.5			2.6
	Weighted-average expected prepayment (constant prepayment rate)			13.3	%		11.8	%		11.1	%		11.4	%		13.5	%		11.5	%		10.9	%		11.2	%
	Weighted-average expected life (in years)			6.2			6.7			7			6.9			6.2			6.9			7.2			7.1
	Weighted-average discount rate			11.9	%		11.2	%		9.8	%		10.2	%		11.9	%		11.2	%		9.8	%		10.2	%
	(a)	Value is calculated as fair value divided by the servicing portfolio.
	(b)	Represents loans sold primarily to GSEs.

Preferred_Stock_Tables

Preferred Stock (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock	'
	The number of shares issued and outstanding and the carrying amount of each outstanding series of the Company’s preferred stock was as follows:
			March 31, 2014								December 31, 2013
	(Dollars in Millions)		Shares		Liquidation		Discount		Carrying		Shares		Liquidation		Discount		Carrying
			Issued and		Preference				Amount		Issued and		Preference				Amount
			Outstanding								Outstanding
	Series A			12,510	$	1,251	$	145	$	1,106		12,510	$	1,251	$	145	$	1,106
	Series B			40,000		1,000		–		1,000		40,000		1,000		–		1,000
	Series F			44,000		1,100		12		1,088		44,000		1,100		12		1,088
	Series G			43,400		1,085		10		1,075		43,400		1,085		10		1,075
	Series H			20,000		500		13		487		20,000		500		13		487
	Total preferred stock (a)			159,910	$	4,936	$	180	$	4,756		159,910	$	4,936	$	180	$	4,756
	(a)	The par value of all shares issued and outstanding at March 31, 2014 and December 31, 2013, was $1.00 per share.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Reconciliation of Transactions Affecting Accumulated Other Comprehensive Income (Loss) Included in Shareholders' Equity	'
	The reconciliation of the transactions affecting accumulated other comprehensive income (loss) included in shareholders’ equity for the three months ended March 31, is as follows:
	(Dollars in Millions)	Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign			Total
		(Losses) on			(Losses) on			(Losses) on			(Losses) on			Currency
		Securities			Securities			Derivative Hedges			Retirement Plans			Translation
		Available-For-Sale			Transferred From
					Available-For-
					Sale to Held-To-
					Maturity
	2014
	Balance at beginning of period	$	(77	)	$	70		$	(261	)	$	(743	)	$	(60	)	$	(1,071	)
	Changes in unrealized gains and losses		301			–			(11	)		–			–			290
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		–			–			–			–			–			–
	Foreign currency translation adjustment		–			–			–			–			(4	)		(4	)
	Reclassification to earnings of realized gains and losses		(5	)		(7	)		49			36			–			73
	Applicable income taxes		(113	)		3			(15	)		(14	)		1			(138	)
	Balance at end of period	$	106		$	66		$	(238	)	$	(721	)	$	(63	)	$	(850	)
	2013
	Balance at beginning of period	$	679		$	107		$	(404	)	$	(1,265	)	$	(40	)	$	(923	)
	Changes in unrealized gains and losses		(120	)		–			(3	)		(1	)		–			(124	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		6			–			–			–			–			6
	Foreign currency translation adjustment		–			–			–			–			(10	)		(10	)
	Reclassification to earnings of realized gains and losses		(5	)		(20	)		54			62			–			91
	Applicable income taxes		43			7			(18	)		(17	)		4			19
	Balance at end of period	$	603		$	94		$	(371	)	$	(1,221	)	$	(46	)	$	(941	)
Impact to Net Income for Items Reclassified out of Accumulated Other Comprehensive Income and into Earnings	'
	Additional detail about the impact to net income for items reclassified out of accumulated other comprehensive income and into earnings for the three months ended March 31, is as follows:
		Impact to Net Income
	(Dollars in Millions)	2014			2013			Affected Line Item in the
								Consolidated Statement of Income
	Unrealized gains (losses) on securities available-for-sale
	Realized gains (losses) on sale of securities	$	5		$	12		Total securities gains (losses), net
	Other-than-temporary impairment recognized in earnings		–			(7	)
			5			5		Total before tax
			(2	)		(2	)	Applicable income taxes
			3			3		Net-of-tax
	Unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity
	Amortization of unrealized gains		7			20		Interest income
			(3	)		(7	)	Applicable income taxes
			4			13		Net-of-tax
	Unrealized gains (losses) on derivative hedges
	Realized gains (losses) on derivative hedges		(49	)		(54	)	Net interest income
			19			21		Applicable income taxes
			(30	)		(33	)	Net-of-tax
	Unrealized gains (losses) on retirement plans
	Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization		(36	)		(62	)	Employee benefits expense
			14			24		Applicable income taxes
			(22	)		(38	)	Net-of-tax
	Total impact to net income	$	(45	)	$	(55	)

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Components of Earnings Per Share	'
	The components of earnings per share were:
		Three Months Ended
		March 31,
	(Dollars and Shares in Millions, Except Per Share Data)	2014			2013
	Net income attributable to U.S. Bancorp	$	1,397		$	1,428
	Preferred dividends		(60	)		(64	)
	Earnings allocated to participating stock awards		(6	)		(6	)
	Net income applicable to U.S. Bancorp common shareholders	$	1,331		$	1,358
	Average common shares outstanding		1,818			1,858
	Net effect of the exercise and assumed purchase of stock awards		10			9
	Average diluted common shares outstanding		1,828			1,867
	Earnings per common share	$	0.73		$	0.73
	Diluted earnings per common share	$	0.73		$	0.73

Employee_Benefits_Tables

Employee Benefits (Tables)	3 Months Ended
	Mar. 31, 2014
Compensation And Retirement Disclosure [Abstract]	'
Components of Net Periodic Benefit Cost	'
	The components of net periodic benefit cost for the Company’s retirement plans were:
		Three Months Ended March 31,
		Pension Plans						Postretirement
								Welfare Plan
	(Dollars in Millions)	2014			2013			2014			2013
	Service cost	$	38		$	42		$	–		$	1
	Interest cost		49			42			1			1
	Expected return on plan assets		(52	)		(44	)		–			–
	Prior service cost (credit) and transition obligation (asset) amortization		(1	)		(1	)		(1	)		–
	Actuarial loss (gain) amortization		40			66			(2	)		(3	)
	Net periodic benefit cost	$	74		$	105		$	(2	)	$	(1	)

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Components of Income Tax Expense	'
	The components of income tax expense were:
		Three Months Ended
		March 31,
	(Dollars in Millions)	2014			2013
	Federal
	Current	$	490		$	490
	Deferred		(67	)		12
	Federal income tax		423			502
	State
	Current		83			58
	Deferred		(10	)		(2	)
	State income tax		73			56
	Total income tax provision	$	496		$	558
Reconciliation of Expected Income Tax Expense at Federal Statutory Rate of 35 Percent to Company's Applicable Income Tax Expense	'
	A reconciliation of expected income tax expense at the federal statutory rate of 35 percent to the Company’s applicable income tax expense follows:
		Three Months Ended
		March 31,
	(Dollars in Millions)	2014			2013
	Tax at statutory rate	$	668		$	681
	State income tax, at statutory rates, net of federal tax benefit		43			36
	Tax effect of
	Tax credits and benefits, net of related expenses		(165	)		(106	)
	Tax-exempt income		(52	)		(54	)
	Noncontrolling interests		(5	)		14
	Other items		7			(13	)
	Applicable income taxes	$	496		$	558

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Asset and Liability Management Derivative Positions of Company	'
	The following table summarizes the asset and liability management derivative positions of the Company:
			Asset Derivatives									Liability Derivatives
	(Dollars in Millions)		Notional			Fair			Weighted-Average			Notional			Fair		Weighted-Average
			Value			Value			Remaining			Value			Value		Remaining
									Maturity								Maturity
									In Years								In Years
	March 31, 2014
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	500		$	17			1.84		$	–		$	–		–
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			272			17			8.52			5,462			451		2.53
	Receive fixed/pay floating swaps			7,000			22			0.6			–			–		–
	Net investment hedges
	Foreign exchange forward contracts			1,082			9			0.04			–			–		–
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			2,259			13			0.07			1,526			1		0.04
	Sell			2,345			7			0.11			2,119			9		0.09
	Options
	Purchased			3,250			–			0.07			–			–		–
	Written			2,427			27			0.08			6			–		0.07
	Receive fixed/pay floating swaps			3,375			5			10.23			100			–		10.23
	Foreign exchange forward contracts			1,618			3			0.01			2,230			8		0.03
	Equity contracts			68			1			1.38			9			–		1.22
	Credit contracts			1,298			4			3.85			2,198			6		3.14
	Total		$	25,494		$	125					$	13,650		$	475
	December 31, 2013
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	500		$	22			2.09		$	–		$	–		–
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			772			26			6.25			4,288			498		2.46
	Receive fixed/pay floating swaps			7,000			26			0.84			–			–		–
	Net investment hedges
	Foreign exchange forward contracts			–			–			–			1,056			4		0.04
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			2,310			9			0.07			1,025			7		0.06
	Sell			5,234			58			0.08			346			4		0.17
	Options
	Purchased			2,300			–			0.07			–			–		–
	Written			1,902			17			0.07			2			–		0.08
	Receive fixed/pay floating swaps			–			–			–			3,540			56		10.22
	Foreign exchange forward contracts			6,813			24			0.02			2,121			4		0.02
	Equity contracts			79			3			1.62			–			–		–
	Credit contracts			1,209			4			4.04			2,352			7		3.08
	Total		$	28,119		$	189					$	14,730		$	580
Customer-Related Derivative Positions of Company	'
	The following table summarizes the customer-related derivative positions of the Company:
			Asset Derivatives									Liability Derivatives
	(Dollars in Millions)		Notional			Fair			Weighted-Average			Notional			Fair		Weighted-Average
			Value			Value			Remaining			Value			Value		Remaining
									Maturity								Maturity
									In Years								In Years
	March 31, 2014
	Interest rate contracts
	Receive fixed/pay floating swaps		$	13,905		$	622			5.43		$	6,082		$	52		5.01
	Pay fixed/receive floating swaps			5,700			61			4.75			14,226			590		5.43
	Options
	Purchased			3,249			18			4.54			26			–		3.17
	Written			26			–			3.17			3,249			18		4.54
	Futures
	Buy			–			–			–			124			–		0.21
	Sell			787			–			1.29			421			–		1.13
	Foreign exchange rate contracts
	Forwards, spots and swaps			12,049			445			0.59			11,759			415		0.58
	Options
	Purchased			724			13			0.58			–			–		–
	Written			–			–			–			724			13		0.58
	Total		$	36,440		$	1,159					$	36,611		$	1,088
	December 31, 2013
	Interest rate contracts
	Receive fixed/pay floating swaps		$	11,717		$	600			5.11		$	7,291		$	106		5.57
	Pay fixed/receive floating swaps			6,746			114			6.03			12,361			560		4.9
	Options
	Purchased			3,489			33			4.53			–			–		–
	Written			–			–			–			3,489			33		4.53
	Foreign exchange rate contracts
	Forwards, spots and swaps			10,970			457			0.59			9,975			427		0.62
	Options
	Purchased			364			11			0.53			–			–		–
	Written			–			–			–			364			11		0.53
	Total		$	33,286		$	1,215					$	33,480		$	1,137
Summary of Effective Portion of Gains (Losses) Recognized in Other Comprehensive Income (Loss) and Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	'
	The table below shows the effective portion of the gains (losses) recognized in other comprehensive income (loss) and the gains (losses) reclassified from other comprehensive income (loss) into earnings (net-of-tax) for the three months ended March 31:
			Gains (Losses)						Gains (Losses)
			Recognized in						Reclassified
			Other						from Other
			Comprehensive						Comprehensive
			Income (Loss)						Income (Loss)
									into Earnings
	(Dollars in Millions)		2014			2013			2014			2013
	Asset and Liability Management Positions
	Cash flow hedges
	Interest rate contracts (a)		$	(7	)	$	–		$	(30	)	$	(33	)
	Net investment hedges
	Foreign exchange forward contracts			–			23			–			–
	Note:	Ineffectiveness on cash flow and net investment hedges was not material for the three months ended March 31, 2014 and 2013.
	(a)	Gains (Losses) reclassified from other comprehensive income (loss) into interest income on loans and interest expense on long-term debt.
Summary of Gains (Losses) Recognized in Earnings for Fair Value Hedges, Other Economic Hedges and Customer-Related Positions	'
	The table below shows the gains (losses) recognized in earnings for fair value hedges, other economic hedges and the customer-related positions for the three months ended March 31:
	(Dollars in Millions)		Location of Gains (Losses)			2014			2013
			Recognized in Earnings
	Asset and Liability Management Positions
	Fair value hedges (a)
	Interest rate contracts			Other noninterest income		$	(2	)	$	(2	)
	Other economic hedges
	Interest rate contracts
	Futures and forwards			Mortgage banking revenue			(49	)		236
	Purchased and written options			Mortgage banking revenue			66			129
	Receive fixed/pay floating swaps			Mortgage banking revenue			109			(40	)
	Foreign exchange forward contracts			Commercial products revenue			(5	)		8
	Credit contracts			Other noninterest income/expense			–			(1	)
	Customer-Related Positions
	Interest rate contracts
	Receive fixed/pay floating swaps			Other noninterest income			134			(96	)
	Pay fixed/receive floating swaps			Other noninterest income			(129	)		96
	Foreign exchange rate contracts
	Forwards, spots and swaps			Commercial products revenue			16			7
	(a)	Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $2 million for both the three months ended March 31, 2014 and 2013. The ineffective portion was immaterial for the three months ended March 31, 2014 and 2013.

Netting_Arrangements_for_Certa1

Netting Arrangements for Certain Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Text Block [Abstract]	'
Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet But Available for Offset in Event of Default	'
	The following tables provide information on the Company’s netting adjustments, and items not offset on the Consolidated Balance Sheet but available for offset in the event of default:
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on						Net
			Recognized		Offset on the			Presented on the		the Consolidated Balance Sheet						Amount
			Assets		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral
										Instruments (b)			Received (c)
	March 31, 2014
	Derivative assets (d)		$	1,218	$	(470	)	$	748	$	(32	)	$	–		$	716
	Reverse repurchase agreements			26		–			26		(19	)		(7	)		–
	Securities borrowed			680		–			680		–			(660	)		20
	Total		$	1,924	$	(470	)	$	1,454	$	(51	)	$	(667	)	$	736
	December 31, 2013
	Derivative assets (d)		$	1,349	$	(599	)	$	750	$	(21	)	$	–		$	729
	Reverse repurchase agreements			87		–			87		(59	)		(28	)		–
	Securities borrowed			723		–			723		–			(698	)		25
	Total		$	2,159	$	(599	)	$	1,560	$	(80	)	$	(726	)	$	754
	(a)	Includes $87 million and $124 million of cash collateral related payables that were netted against derivative assets at March 31, 2014 and December 31, 2013, respectively.
	(b)	For derivative assets this includes any derivative liability fair values that could be offset in the event of counterparty default; for reverse repurchase agreements this includes any repurchase agreement payables that could be offset in the event of counterparty default; for securities borrowed this includes any securities loaned payables that could be offset in the event of counterparty default.
	(c)	Includes the fair value of securities received by the Company from the counterparty. These securities are not included on the Consolidated Balance Sheet unless the counterparty defaults.
	(d)	Excludes $66 million and $55 million of derivative assets centrally cleared or otherwise not subject to netting arrangements at March 31, 2014 and December 31, 2013, respectively.
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on						Net
			Recognized		Offset on the			Presented on the		the Consolidated Balance Sheet						Amount
			Liabilities		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral
										Instruments (b)			Pledged (c)
	March 31, 2014
	Derivative liabilities (d)		$	1,485	$	(1,138	)	$	347	$	(32	)	$	–		$	315
	Repurchase agreements			699		–			699		(19	)		(680	)		–
	Securities loaned			–		–			–		–			–			–
	Total		$	2,184	$	(1,138	)	$	1,046	$	(51	)	$	(680	)	$	315
	December 31, 2013
	Derivative liabilities (d)		$	1,598	$	(1,192	)	$	406	$	(21	)	$	–		$	385
	Repurchase agreements			2,059		–			2,059		(59	)		(2,000	)		–
	Securities loaned			–		–			–		–			–			–
	Total		$	3,657	$	(1,192	)	$	2,465	$	(80	)	$	(2,000	)	$	385
	(a)	Includes $754 million and $717 million of cash collateral related receivables that were netted against derivative liabilities at March 31, 2014 and December 31, 2013, respectively.
	(b)	For derivative liabilities this includes any derivative asset fair values that could be offset in the event of counterparty default; for repurchase agreements this includes any reverse repurchase agreement receivables that could be offset in the event of counterparty default; for securities loaned this includes any securities borrowed receivables that could be offset in the event of counterparty default.
	(c)	Includes the fair value of securities pledged by the Company to the counterparty. These securities are included on the Consolidated Balance Sheet unless the Company defaults.
	(d)	Excludes $78 million and $119 million of derivative liabilities centrally cleared or otherwise not subject to netting arrangements at March 31, 2014 and December 31, 2013, respectively.

Fair_Values_of_Assets_and_Liab1

Fair Values of Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Valuation Assumption Ranges for Level 3 Available-for-Sale Investment Securities	'
	The following table shows the significant valuation assumption ranges for Level 3 available-for-sale investment securities at March 31, 2014:
			Minimum			Maximum			Average
	Residential Prime Non-Agency Mortgage-Backed Securities (a)
	Estimated lifetime prepayment rates			6	%		25	%		14	%
	Lifetime probability of default rates			–			7			4
	Lifetime loss severity rates			15			75			40
	Discount margin			2			5			3
	Residential Non-Prime Non-Agency Mortgage-Backed Securities (b)
	Estimated lifetime prepayment rates			2	%		10	%		6	%
	Lifetime probability of default rates			4			12			7
	Lifetime loss severity rates			15			70			53
	Discount margin			1			5			3
	Other Asset-Backed Securities
	Estimated lifetime prepayment rates			6	%		6	%		6	%
	Lifetime probability of default rates			5			5			5
	Lifetime loss severity rates			40			40			40
	Discount margin			7			7			7
	(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
	(b)	Includes all securities not meeting the conditions to be designated as prime.
Valuation Assumption Ranges for MSRs	'
	The following table shows the significant valuation assumption ranges for MSRs at March 31, 2014:
			Minimum			Maximum			Average
	Expected prepayment			10	%		20	%		11	%
	Discount rate			10			14			10
Valuation Assumption Ranges for Derivative Commitments	'
	The following table shows the significant valuation assumption ranges for the Company’s derivative commitments to sell, purchase and originate mortgage loans at March 31, 2014:
			Minimum			Maximum			Average
	Expected loan close rate			43	%		100	%		76	%
	Inherent MSR value (basis points per loan)			48			209			126
Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table summarizes the balances of assets and liabilities measured at fair value on a recurring basis:
	(Dollars in Millions)		Level 1			Level 2			Level 3			Netting			Total
	March 31, 2014
	Available-for-sale securities
	U.S. Treasury and agencies		$	7		$	1,055		$	–		$	–		$	1,062
	Mortgage-backed securities
	Residential
	Agency			–			35,484			–			–			35,484
	Non-agency
	Prime (a)			–			–			465			–			465
	Non-prime (b)			–			–			297			–			297
	Commercial
	Agency			–			144			–			–			144
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			24			–			–			24
	Other			–			563			65			–			628
	Obligations of state and political subdivisions			–			5,585			–			–			5,585
	Obligations of foreign governments			–			6			–			–			6
	Corporate debt securities			–			661			9			–			670
	Perpetual preferred securities			–			218			–			–			218
	Other investments			159			19			–			–			178
	Total available-for-sale			166			43,759			836			–			44,761
	Mortgage loans held for sale			–			1,827			–			–			1,827
	Mortgage servicing rights			–			–			2,618			–			2,618
	Derivative assets			–			742			542			(470	)		814
	Other assets			118			856			–			–			974
	Total		$	284		$	47,184		$	3,996		$	(470	)	$	50,994
	Derivative liabilities		$	–		$	1,503		$	60		$	(1,138	)	$	425
	Short-term borrowings (c)			75			599			–			–			674
	Total		$	75		$	2,102		$	60		$	(1,138	)	$	1,099
	December 31, 2013
	Available-for-sale securities
	U.S. Treasury and agencies		$	7		$	1,038		$	–		$	–		$	1,045
	Mortgage-backed securities
	Residential
	Agency			–			31,553			–			–			31,553
	Non-agency
	Prime (a)			–			–			478			–			478
	Non-prime (b)			–			–			297			–			297
	Commercial
	Agency			–			152			–			–			152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			24			–			–			24
	Other			–			566			63			–			629
	Obligations of state and political subdivisions			–			5,738			–			–			5,738
	Obligations of foreign governments			–			6			–			–			6
	Corporate debt securities			–			631			9			–			640
	Perpetual preferred securities			–			212			–			–			212
	Other investments			141			20			–			–			161
	Total available-for-sale			148			39,940			847			–			40,935
	Mortgage loans held for sale			–			3,263			–			–			3,263
	Mortgage servicing rights			–			–			2,680			–			2,680
	Derivative assets			–			889			515			(599	)		805
	Other assets			143			588			–			–			731
	Total		$	291		$	44,680		$	4,042		$	(599	)	$	48,414
	Derivative liabilities		$	–		$	1,647		$	70		$	(1,192	)	$	525
	Short-term borrowings (c)			112			551			–			–			663
	Total		$	112		$	2,198		$	70		$	(1,192	)	$	1,188
	(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
	(b)	Includes all securities not meeting the conditions to be designated as prime.
	(c)	Represents the Company’s obligation on securities sold short required to be accounted for at fair value per applicable accounting guidance.
Changes in Fair Value for All Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)	'
	The following table presents the changes in fair value for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31:
	(Dollars in Millions)		Beginning			Net Gains			Net Gains			Purchases			Sales			Principal			Issuances			Settlements			End		Net Change in
			of Period			(Losses)			(Losses)									Payments									of		Unrealized
			Balance			Included in			Included in																		Period		Gains (Losses)
						Net Income			Other																		Balance		Relating to
									Comprehensive																				Assets and
									Income (Loss)																				Liabilities
																													Still Held at
																													End of Period
	2014
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime (a)		$	478		$	–		$	7		$	–		$	–		$	(20	)	$	–		$	–		$	465	$	7
	Non-prime (b)			297			(1	)		7			–			–			(6	)		–			–			297		7
	Asset-backed securities
	Other			63			1			1			2			–			(2	)		–			–			65		1
	Corporate debt securities			9			–			–			–			–			–			–			–			9		–
	Total available-for-sale			847			–			15	(e)		2			–			(28	)		–			–			836		15
	Mortgage servicing rights			2,680			(147	)(c)		–			1			–			–			84	(f)		–			2,618		(147	)(c)
	Net derivative assets and liabilities			445			185	(d)		–			1			–			–			–			(149	)		482		60	(g)
	2013
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime (a)		$	624		$	(2	)	$	11		$	–		$	–		$	(34	)	$	–		$	–		$	599	$	11
	Non-prime (b)			355			(7	)		14			–			–			(12	)		–			–			350		14
	Asset-backed securities
	Other			15			1			–			25			–			(1	)		–			–			40		–
	Corporate debt securities			9			–			–			–			–			–			–			–			9		–
	Total available-for-sale			1,003			(8	)(h)		25	(e)		25			–			(47	)		–			–			998		25
	Mortgage servicing rights			1,700			(1	)(c)		–			2			–			–			254	(f)		–			1,955		(1	)(c)
	Net derivative assets and liabilities			1,179			147	(i)		–			1			(1	)		–			–			(340	)		986		71	(j)
	(a)	Prime securities are those designated as such by the issuer at origination. When an issuer designation is unavailable, the Company determines at acquisition date the categorization based on asset pool characteristics (such as weighted-average credit score, loan-to-value, loan type, prevalence of low documentation loans) and deal performance (such as pool delinquencies and security market spreads).
	(b)	Includes all securities not meeting the conditions to be designated as prime.
	(c)	Included in mortgage banking revenue.
	(d)	Approximately $81 million included in other noninterest income and $104 million included in mortgage banking revenue.
	(e)	Included in changes in unrealized gains and losses on securities available-for-sale.
	(f)	Represents MSRs capitalized during the period.
	(g)	Approximately $21 million included in other noninterest income and $39 million included in mortgage banking revenue.
	(h)	Approximately $(7) million included in securities gains (losses) and $(1) million included in interest income.
	(i)	Approximately $(3) million included in other noninterest income and $150 million included in mortgage banking revenue.
	(j)	Approximately $(88) million included in other noninterest income and $159 million included in mortgage banking revenue.
Adjusted Carrying Values for Assets Measured at Fair Value on Nonrecurring Basis	'
	The following table summarizes the balances of assets measured at fair value on a nonrecurring basis:
			March 31, 2014												December 31, 2013
	(Dollars in Millions)		Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3			Total
	Loans (a)		$	–		$	–		$	67		$	67		$	–		$	–		$	128		$	128
	Other assets (b)			–			–			51			51			–			–			150			150
	(a)	Represents the carrying value of loans for which adjustments were based on the fair value of the collateral, excluding loans fully charged-off.
	(b)	Primarily represents the fair value of foreclosed properties that were measured at fair value based on an appraisal or broker price opinion of the collateral subsequent to their initial acquisition.
Losses Recognized Related to Nonrecurring Fair Value Measurements of Individual Assets or Portfolios	'
	The following table summarizes losses recognized related to nonrecurring fair value measurements of individual assets or portfolios for the three months ended March 31:
	(Dollars in Millions)		2014			2013
	Loans (a)		$	16		$	21
	Other assets (b)			19			39
	(a)	Represents write-downs of loans which were based on the fair value of the collateral, excluding loans fully charged-off.
	(b)	Primarily represents related losses of foreclosed properties that were measured at fair value subsequent to their initial acquisition.
Differences Between Aggregate Fair Value, Carrying Amount of MLHFS and Aggregate Unpaid Principal Amount	'
	The following table summarizes the differences between the aggregate fair value carrying amount of MLHFS for which the fair value option has been elected and the aggregate unpaid principal amount that the Company is contractually obligated to receive at maturity:
			March 31, 2014									December 31, 2013
	(Dollars in Millions)		Fair Value			Aggregate			Carrying			Fair Value			Aggregate			Carrying
			Carrying			Unpaid			Amount Over			Carrying			Unpaid			Amount Over
			Amount			Principal			(Under) Unpaid			Amount			Principal			(Under) Unpaid
									Principal									Principal
	Total loans		$	1,827		$	1,764		$	63		$	3,263		$	3,195		$	68
	Nonaccrual loans			10			15			(5	)		9			14			(5	)
	Loans 90 days or more past due			2			2			–			–			–			–
Estimated Fair Values of Financial Instruments	'
	The estimated fair values of the Company’s financial instruments are shown in the table below:
			March 31, 2014															December 31, 2013
			Carrying			Fair Value												Carrying			Fair Value
	(Dollars in Millions)		Amount			Level 1			Level 2			Level 3			Total			Amount			Level 1			Level 2			Level 3		Total
	Financial Assets
	Cash and due from banks		$	7,408		$	7,408		$	–		$	–		$	7,408		$	8,477		$	8,477		$	–		$	–	$	8,477
	Federal funds sold and securities purchased under resale agreements			56			–			56			–			56			163			–			163			–		163
	Investment securities held-to-maturity			40,712			1,443			38,847			99			40,389			38,920			2,589			35,678			101		38,368
	Loans held for sale (a)			16			–			–			16			16			5			–			–			5		5
	Loans (b)			234,119			–			–			235,218			235,218			230,857			–			–			231,480		231,480
	Other financial instruments			2,307			–			954			1,364			2,318			2,443			–			1,080			1,383		2,463
	Financial Liabilities
	Deposits			260,612			–			260,623			–			260,623			262,123			–			262,200			–		262,200
	Short-term borrowings (c)			30,107			–			30,001			–			30,001			26,945			–			26,863			–		26,863
	Long-term debt			23,774			–			24,127			–			24,127			20,049			–			20,391			–		20,391
	Other liabilities			1,253			–			–			1,253			1,253			1,263			–			–			1,263		1,263
	(a)	Excludes mortgages held for sale for which the fair value option under applicable accounting guidance was elected.
	(b)	Excludes loans measured at fair value on a nonrecurring basis.
	(c)	Excludes the Company’s obligation on securities sold short required to be accounted for at fair value per applicable accounting guidance.

Guarantees_and_Contingent_Liab1

Guarantees and Contingent Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Summary of Other Guarantees and Contingent Liabilities	'
	The following table is a summary of other guarantees and contingent liabilities of the Company at March 31, 2014:
	(Dollars in Millions)		Collateral			Carrying			Maximum
			Held			Amount			Potential
									Future
									Payments
	Standby letters of credit		$	–		$	69		$	16,638
	Third-party borrowing arrangements			–			–			16
	Securities lending indemnifications			5,008			–			4,902
	Asset sales			–			183			3,786	(a)
	Merchant processing			839			71			85,817
	Contingent consideration arrangements			–			11			12
	Tender option bond program guarantee			4,455			–			4,349
	Minimum revenue guarantees			–			10			10
	Other			–			–			374
	(a)	The maximum potential future payments do not include loan sales where the Company provides standard representation and warranties to the buyer against losses related to loan underwriting documentation defects that may have existed at the time of sale that generally are identified after the occurrence of a triggering event such as delinquency. For these types of loan sales, the maximum potential future payments is generally the unpaid principal balance of loans sold measured at the end of the current reporting period. Actual losses will be significantly less than the maximum exposure, as only a fraction of loans sold will have a representation and warranty breach, and any losses on repurchase would generally be mitigated by any collateral held against the loans.
Company's Representation and Warranty Reserve	'
	The following table is a rollforward of the Company’s representation and warranty reserve:
			Three Months Ended
			March 31,
	(Dollars in Millions)		2014			2013
	Balance at beginning of period		$	83		$	240
	Net realized losses			(10	)		(23	)
	Additions to reserve			2			16
	Balance at end of period		$	75		$	233

Investment_Securities_Investme

Investment Securities - Investment Securities (Detail) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	$44,589		$41,059
Available-for-sale securities, total, fair value	44,761	[1]	40,935	[1]
Available-for-sale securities, total, weighted average maturity in years	'5 years 4 months 24 days		'6 years
Available-for-sale securities, total, weighted average yield	2.52%		2.64%
Held-to-maturity securities, total, amortized cost	40,712	[1]	38,920	[1]
Held-to-maturity securities, total, fair value	40,389		38,368
Held-to-maturity securities, total, weighted average maturity in years	'4 years 6 months		'4 years 6 months
Held-to-maturity securities, total, weighted average yield	2.00%		2.00%
Total investment securities amortized cost	85,301		79,979
Total investment securities, percentage	100.00%		100.00%
U.S. Treasury and agencies [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	1,104		'
Available-for-sale securities, total, fair value	1,062		'
Available-for-sale securities, total, weighted average maturity in years	'9 years 7 months 6 days		'
Available-for-sale securities, total, weighted average yield	2.77%		'
Held-to-maturity securities, total, amortized cost	1,984		'
Held-to-maturity securities, total, fair value	1,928		'
Held-to-maturity securities, total, weighted average maturity in years	'5 years 4 months 24 days		'
Held-to-maturity securities, total, weighted average yield	1.68%		'
Total investment securities amortized cost	3,088		4,222
Total investment securities, percentage	3.60%		5.30%
U.S. Treasury and agencies [Member] | Maturing in one year or less [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing within one year, amortized cost	30		'
Available-for-sale, securities maturing within one year, fair value	30		'
Available-for-sale securities, total, weighted average maturity in years	'4 months 24 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	4.53%		'
Held-to-maturity securities, maturities within one year, amortized cost	650		'
Held-to-maturity securities, maturities within one year, fair value	651		'
Held-to-maturity securities, total, weighted average maturity in years	'2 months 12 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	0.96%		'
U.S. Treasury and agencies [Member] | Maturing after one year through five years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after one through five year, amortized cost	31		'
Available-for-sale, securities maturing after one through five year, fair value	32		'
Available-for-sale securities, total, weighted average maturity in years	'2 years 4 months 24 days		'
Available for sale securities, maturing after one year through five years weighted average yield	3.12%		'
Held-to-maturity securities, maturities after one year through five years, amortized cost	80		'
Held to maturity securities, maturities after one year through five years, fair value	81		'
Held-to-maturity securities, total, weighted average maturity in years	'1 year 2 months 12 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	1.36%		'
U.S. Treasury and agencies [Member] | Maturing after five years through ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after five through ten year, amortized cost	842		'
Available-for-sale, securities maturing after five through ten year, fair value	804		'
Available-for-sale securities, total, weighted average maturity in years	'8 years 6 months		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	2.83%		'
Held-to-maturity securities, maturities after five years through ten years, amortized cost	1,195		'
Held-to-maturity securities, maturities after five year through ten years, fair value	1,137		'
Held-to-maturity securities, total, weighted average maturity in years	'8 years 3 months 18 days		'
Held-to-maturity securities, maturing after five year through ten years, weighted average yield	2.09%		'
U.S. Treasury and agencies [Member] | Maturing after ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after ten years, amortized cost	201		'
Available-for-sale, securities maturing after ten years, fair value	196		'
Available-for-sale securities, total, weighted average maturity in years	'16 years 4 months 24 days		'
Available-for-sale securities, maturing after ten years, weighted average yield	2.19%		'
Held-to-maturity securities, maturities after ten years, amortized cost	59		'
Held-to-maturity securities, maturities after ten years, fair value	59		'
Held-to-maturity securities, total, weighted average maturity in years	'11 years 1 month 6 days		'
Held-to-maturity securities, maturing after ten years, weighted average yield	1.75%		'
Mortgage-Backed Securities [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	36,322		'
Available-for-sale securities, total, fair value	36,390		'
Available-for-sale securities, total, weighted average maturity in years	'5 years 2 months 12 days		'
Available-for-sale securities, total, weighted average yield	1.91%		'
Held-to-maturity securities, total, amortized cost	38,594		'
Held-to-maturity securities, total, fair value	38,327		'
Held-to-maturity securities, total, weighted average maturity in years	'4 years 6 months		'
Held-to-maturity securities, total, weighted average yield	2.02%		'
Total investment securities amortized cost	74,916		68,236
Total investment securities, percentage	87.80%		85.30%
Mortgage-Backed Securities [Member] | Maturing in one year or less [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing within one year, amortized cost	298		'
Available-for-sale, securities maturing within one year, fair value	302		'
Available-for-sale securities, total, weighted average maturity in years	'7 months 6 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	2.34%		'
Held-to-maturity securities, maturities within one year, amortized cost	12		'
Held-to-maturity securities, maturities within one year, fair value	12		'
Held-to-maturity securities, total, weighted average maturity in years	'8 months 12 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	2.17%		'
Mortgage-Backed Securities [Member] | Maturing after one year through five years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after one through five year, amortized cost	17,414		'
Available-for-sale, securities maturing after one through five year, fair value	17,414		'
Available-for-sale securities, total, weighted average maturity in years	'3 years 9 months 18 days		'
Available for sale securities, maturing after one year through five years weighted average yield	2.07%		'
Held-to-maturity securities, maturities after one year through five years, amortized cost	24,023		'
Held to maturity securities, maturities after one year through five years, fair value	23,908		'
Held-to-maturity securities, total, weighted average maturity in years	'3 years 7 months 6 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	2.26%		'
Mortgage-Backed Securities [Member] | Maturing after five years through ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after five through ten year, amortized cost	16,918		'
Available-for-sale, securities maturing after five through ten year, fair value	16,980		'
Available-for-sale securities, total, weighted average maturity in years	'5 years 10 months 24 days		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	1.80%		'
Held-to-maturity securities, maturities after five years through ten years, amortized cost	13,819		'
Held-to-maturity securities, maturities after five year through ten years, fair value	13,655		'
Held-to-maturity securities, total, weighted average maturity in years	'5 years 7 months 6 days		'
Held-to-maturity securities, maturing after five year through ten years, weighted average yield	1.62%		'
Mortgage-Backed Securities [Member] | Maturing after ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after ten years, amortized cost	1,692		'
Available-for-sale, securities maturing after ten years, fair value	1,694		'
Available-for-sale securities, total, weighted average maturity in years	'13 years 2 months 12 days		'
Available-for-sale securities, maturing after ten years, weighted average yield	1.20%		'
Held-to-maturity securities, maturities after ten years, amortized cost	740		'
Held-to-maturity securities, maturities after ten years, fair value	752		'
Held-to-maturity securities, total, weighted average maturity in years	'12 years 1 month 6 days		'
Held-to-maturity securities, maturing after ten years, weighted average yield	1.24%		'
Asset-Backed Securities [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	634		'
Available-for-sale securities, total, fair value	652		'
Available-for-sale securities, total, weighted average maturity in years	'6 years		'
Available-for-sale securities, total, weighted average yield	2.06%		'
Held-to-maturity securities, total, amortized cost	15		'
Held-to-maturity securities, total, fair value	26		'
Held-to-maturity securities, total, weighted average maturity in years	'4 years 6 months		'
Held-to-maturity securities, total, weighted average yield	0.84%		'
Total investment securities amortized cost	649		652
Total investment securities, percentage	0.80%		0.80%
Asset-Backed Securities [Member] | Maturing in one year or less [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing within one year, amortized cost	'		'
Available-for-sale, securities maturing within one year, fair value	'		'
Available-for-sale securities, maturing in one year or less, weighted average yield	'		'
Held-to-maturity securities, maturities within one year, amortized cost	'		'
Held-to-maturity securities, maturities within one year, fair value	'		'
Held-to-maturity securities, total, weighted average maturity in years	'1 month 6 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	0.38%		'
Asset-Backed Securities [Member] | Maturing after one year through five years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after one through five year, amortized cost	272		'
Available-for-sale, securities maturing after one through five year, fair value	283		'
Available-for-sale securities, total, weighted average maturity in years	'3 years 10 months 24 days		'
Available for sale securities, maturing after one year through five years weighted average yield	1.54%		'
Held-to-maturity securities, maturities after one year through five years, amortized cost	11		'
Held to maturity securities, maturities after one year through five years, fair value	14		'
Held-to-maturity securities, total, weighted average maturity in years	'3 years 7 months 6 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	0.81%		'
Asset-Backed Securities [Member] | Maturing after five years through ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after five through ten year, amortized cost	362		'
Available-for-sale, securities maturing after five through ten year, fair value	369		'
Available-for-sale securities, total, weighted average maturity in years	'7 years 6 months		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	2.45%		'
Held-to-maturity securities, maturities after five years through ten years, amortized cost	3		'
Held-to-maturity securities, maturities after five year through ten years, fair value	3		'
Held-to-maturity securities, total, weighted average maturity in years	'6 years 6 months		'
Held-to-maturity securities, maturing after five year through ten years, weighted average yield	0.92%		'
Asset-Backed Securities [Member] | Maturing after ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after ten years, amortized cost	'		'
Available-for-sale, securities maturing after ten years, fair value	'		'
Available-for-sale securities, total, weighted average maturity in years	'17 years 3 months 18 days		'
Available-for-sale securities, maturing after ten years, weighted average yield	2.45%		'
Held-to-maturity securities, maturities after ten years, amortized cost	1		'
Held-to-maturity securities, maturities after ten years, fair value	9		'
Held-to-maturity securities, total, weighted average maturity in years	'10 years		'
Held-to-maturity securities, maturing after ten years, weighted average yield	0.97%		'
Obligations of state and political subdivisions [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	5,432		'
Available-for-sale securities, total, fair value	5,585		'
Available-for-sale securities, total, weighted average maturity in years	'3 years 2 months 12 days		'
Available-for-sale securities, total, weighted average yield	6.59%		'
Held-to-maturity securities, total, amortized cost	11		'
Held-to-maturity securities, total, fair value	11		'
Held-to-maturity securities, total, weighted average maturity in years	'9 years 1 month 6 days		'
Held-to-maturity securities, total, weighted average yield	4.78%		'
Total investment securities amortized cost	5,443		5,685
Total investment securities, percentage	6.40%		7.10%
Obligations of state and political subdivisions [Member] | Maturing in one year or less [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing within one year, amortized cost	146		'
Available-for-sale, securities maturing within one year, fair value	149		'
Available-for-sale securities, total, weighted average maturity in years	'7 months 6 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	6.43%		'
Held-to-maturity securities, maturities within one year, amortized cost	1		'
Held-to-maturity securities, maturities within one year, fair value	1		'
Held-to-maturity securities, total, weighted average maturity in years	'8 months 12 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	10.39%		'
Obligations of state and political subdivisions [Member] | Maturing after one year through five years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after one through five year, amortized cost	4,614		'
Available-for-sale, securities maturing after one through five year, fair value	4,769		'
Available-for-sale securities, total, weighted average maturity in years	'2 years 6 months		'
Available for sale securities, maturing after one year through five years weighted average yield	6.79%		'
Held-to-maturity securities, maturities after one year through five years, amortized cost	2		'
Held to maturity securities, maturities after one year through five years, fair value	2		'
Held-to-maturity securities, total, weighted average maturity in years	'2 years 7 months 6 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	8.36%		'
Obligations of state and political subdivisions [Member] | Maturing after five years through ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after five through ten year, amortized cost	576		'
Available-for-sale, securities maturing after five through ten year, fair value	577		'
Available-for-sale securities, total, weighted average maturity in years	'6 years 8 months 12 days		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	5.15%		'
Held-to-maturity securities, maturities after five years through ten years, amortized cost	1		'
Held-to-maturity securities, maturities after five year through ten years, fair value	1		'
Held-to-maturity securities, total, weighted average maturity in years	'7 years 10 months 24 days		'
Held-to-maturity securities, maturing after five year through ten years, weighted average yield	8.03%		'
Obligations of state and political subdivisions [Member] | Maturing after ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after ten years, amortized cost	96		'
Available-for-sale, securities maturing after ten years, fair value	90		'
Available-for-sale securities, total, weighted average maturity in years	'22 years 7 months 6 days		'
Available-for-sale securities, maturing after ten years, weighted average yield	5.77%		'
Held-to-maturity securities, maturities after ten years, amortized cost	7		'
Held-to-maturity securities, maturities after ten years, fair value	7		'
Held-to-maturity securities, total, weighted average maturity in years	'11 years 10 months 24 days		'
Held-to-maturity securities, maturing after ten years, weighted average yield	2.65%		'
Other Debt Securities and Obligations of Foreign Government [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	741		'
Available-for-sale securities, total, fair value	676		'
Available-for-sale securities, total, weighted average maturity in years	'17 years 10 months 24 days		'
Available-for-sale securities, total, weighted average yield	2.69%		'
Held-to-maturity securities, total, amortized cost	108		'
Held-to-maturity securities, total, fair value	97		'
Held-to-maturity securities, total, weighted average maturity in years	'3 years 3 months 18 days		'
Held-to-maturity securities, total, weighted average yield	1.12%		'
Total investment securities amortized cost	1,205		1,184
Total investment securities, percentage	1.40%		1.50%
Other Debt Securities and Obligations of Foreign Government [Member] | Maturing in one year or less [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing within one year, amortized cost	51		'
Available-for-sale, securities maturing within one year, fair value	51		'
Available-for-sale securities, total, weighted average maturity in years	'2 months 12 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	5.71%		'
Held-to-maturity securities, maturities within one year, amortized cost	6		'
Held-to-maturity securities, maturities within one year, fair value	6		'
Held-to-maturity securities, total, weighted average maturity in years	'2 months 12 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	1.60%		'
Other Debt Securities and Obligations of Foreign Government [Member] | Maturing after one year through five years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after one through five year, amortized cost	'		'
Available-for-sale, securities maturing after one through five year, fair value	'		'
Available for sale securities, maturing after one year through five years weighted average yield	'		'
Held-to-maturity securities, maturities after one year through five years, amortized cost	78		'
Held to maturity securities, maturities after one year through five years, fair value	78		'
Held-to-maturity securities, total, weighted average maturity in years	'2 years 6 months		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	1.12%		'
Other Debt Securities and Obligations of Foreign Government [Member] | Maturing after five years through ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after five through ten year, amortized cost	'		'
Available-for-sale, securities maturing after five through ten year, fair value	'		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	'		'
Held-to-maturity securities, maturities after five years through ten years, amortized cost	24		'
Held-to-maturity securities, maturities after five year through ten years, fair value	13		'
Held-to-maturity securities, total, weighted average maturity in years	'6 years 7 months 6 days		'
Held-to-maturity securities, maturing after five year through ten years, weighted average yield	0.98%		'
Other Debt Securities and Obligations of Foreign Government [Member] | Maturing after ten years [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale, securities maturing after ten years, amortized cost	690		'
Available-for-sale, securities maturing after ten years, fair value	625		'
Available-for-sale securities, total, weighted average maturity in years	'19 years 2 months 12 days		'
Available-for-sale securities, maturing after ten years, weighted average yield	2.47%		'
Held-to-maturity securities, maturities after ten years, amortized cost	'		'
Held-to-maturity securities, maturities after ten years, fair value	'		'
Held-to-maturity securities, maturing after ten years, weighted average yield	'		'
Other Investments Including Perpetual Preferred Securities [Member]	'		'
Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	356		'
Available-for-sale securities, total, fair value	396		'
Available-for-sale securities, total, weighted average maturity in years	'17 years 9 months 18 days		'
Available-for-sale securities, total, weighted average yield	2.74%		'
Held-to-maturity securities, total, amortized cost	'		'
Held-to-maturity securities, total, fair value	'		'
Held-to-maturity securities, total, weighted average yield	'		'
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Investment_Securities_Investme1

Investment Securities - Investment Securities (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Amortized Cost And Fair Value Debt Securities [Abstract]	'	'
Federal statutory rate	35.00%	'
Weighted-average maturity of available-for-sale investment securities	'5 years 4 months 24 days	'6 years
Weighted-average yield of available-for-sale investment securities	2.52%	2.64%
Weighted average maturity of held-to-maturity investment securities	'4 years 6 months	'4 years 6 months
Weighted-average yield of held-to-maturity investment securities	2.00%	2.00%

Basis_of_Presentation_Line_of_

Basis of Presentation - Line of Business Financial Performance (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Condensed Income Statement	'	'
Net interest income (taxable-equivalent basis)	$2,706	$2,709
Net interest income (taxable-equivalent basis), Percent change	-0.10%	'
Noninterest income	2,103	2,160
Noninterest income, Percent change	-2.60%	'
Securities gains (losses), net	5	5
Securities gains (losses), net, Percent change	'	'
Total net revenue	4,814	4,874
Total net revenue, Percent change	-1.20%	'
Noninterest expense, Percent change	3.40%	'
Other intangibles, Percent change	-14.00%	'
Total noninterest expense, Percent change	3.00%	'
Income before provision and income taxes, Percent change	-5.60%	'
Provision for credit losses, Percent change	-24.10%	'
Income before income taxes, Percent change	-1.80%	'
Income taxes and taxable-equivalent adjustment, Percent change	-10.10%	'
Net income, Percent change	1.80%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'
Net income attributable to U.S. Bancorp, Percent change	-2.20%	'
Noninterest expense	2,495	2,413
Other intangibles	49	57
Total noninterest expense	2,544	2,470
Income before provision and income taxes	2,270	2,404
Provision for credit losses	306	403
Income before income taxes	1,964	2,001
Income taxes and taxable-equivalent adjustment	552	614
Net income	1,412	1,387
Net (income) loss attributable to noncontrolling interests	-15	41
Net income attributable to U.S. Bancorp	1,397	1,428
Average Balance Sheet	'	'
Commercial	70,834	65,299
Commercial, Percent change	8.50%	'
Commercial real estate	40,050	37,218
Commercial real estate, Percent change	7.60%	'
Residential mortgages	51,584	45,109
Residential mortgages, Percent change	14.40%	'
Credit card	17,407	16,528
Credit card, Percent change	5.30%	'
Other retail	47,657	47,246
Other retail, Percent change	0.90%	'
Total loans, excluding covered loans	227,532	211,400
Total loans, excluding covered loans, Percent change	7.60%	'
Covered loans	8,327	11,021
Covered loans, Percent change	-24.40%	'
Total loans	235,859	222,421
Total loans, Percent change	6.00%	'
Goodwill, Percent change	0.50%	'
Other intangible assets, Percent change	21.20%	'
Assets, Percent change	3.70%	'
Noninterest-bearing deposits, Percent change	6.70%	'
Interest checking, Percent change	6.00%	'
Savings products, Percent change	9.40%	'
Time deposits, Percent change	-6.10%	'
Total deposits, Percent change	5.10%	'
Total U.S. Bancorp shareholders' equity, Percent change	6.60%	'
Goodwill	9,203	9,155
Other intangible assets	3,441	2,838
Assets	364,312	351,387
Noninterest-bearing deposits	70,824	66,400
Interest checking	51,305	48,404
Savings products	92,444	84,505
Time deposits	42,906	45,709
Total deposits	257,479	245,018
Total U.S. Bancorp shareholders' equity	41,761	39,177
Wholesale Banking and Commercial Real Estate [Member]	'	'
Condensed Income Statement	'	'
Net interest income (taxable-equivalent basis)	490	494
Net interest income (taxable-equivalent basis), Percent change	-0.80%	'
Noninterest income	246	280
Noninterest income, Percent change	-12.10%	'
Securities gains (losses), net	'	'
Securities gains (losses), net, Percent change	'	'
Total net revenue	736	774
Total net revenue, Percent change	-4.90%	'
Noninterest expense, Percent change	-1.60%	'
Other intangibles, Percent change	-50.00%	'
Total noninterest expense, Percent change	-1.90%	'
Income before provision and income taxes, Percent change	-6.90%	'
Provision for credit losses, Percent change	50.00%	'
Income before income taxes, Percent change	-10.00%	'
Income taxes and taxable-equivalent adjustment, Percent change	-10.40%	'
Net income, Percent change	-9.70%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'
Net income attributable to U.S. Bancorp, Percent change	-9.70%	'
Noninterest expense	301	306
Other intangibles	1	2
Total noninterest expense	302	308
Income before provision and income taxes	434	466
Provision for credit losses	-18	-36
Income before income taxes	452	502
Income taxes and taxable-equivalent adjustment	164	183
Net income	288	319
Net (income) loss attributable to noncontrolling interests	'	'
Net income attributable to U.S. Bancorp	288	319
Average Balance Sheet	'	'
Commercial	54,491	49,133
Commercial, Percent change	10.90%	'
Commercial real estate	20,566	18,988
Commercial real estate, Percent change	8.30%	'
Residential mortgages	22	29
Residential mortgages, Percent change	-24.10%	'
Credit card	'	'
Credit card, Percent change	'	'
Other retail	4	8
Other retail, Percent change	-50.00%	'
Total loans, excluding covered loans	75,083	68,158
Total loans, excluding covered loans, Percent change	10.20%	'
Covered loans	245	466
Covered loans, Percent change	-47.40%	'
Total loans	75,328	68,624
Total loans, Percent change	9.80%	'
Goodwill, Percent change	'	'
Other intangible assets, Percent change	-22.20%	'
Assets, Percent change	10.10%	'
Noninterest-bearing deposits, Percent change	7.70%	'
Interest checking, Percent change	-3.80%	'
Savings products, Percent change	43.90%	'
Time deposits, Percent change	11.60%	'
Total deposits, Percent change	13.10%	'
Total U.S. Bancorp shareholders' equity, Percent change	5.30%	'
Goodwill	1,604	1,604
Other intangible assets	21	27
Assets	82,249	74,720
Noninterest-bearing deposits	32,218	29,908
Interest checking	10,472	10,886
Savings products	17,128	11,902
Time deposits	18,385	16,472
Total deposits	78,203	69,168
Total U.S. Bancorp shareholders' equity	7,527	7,150
Consumer and Small Business Banking [Member]	'	'
Condensed Income Statement	'	'
Net interest income (taxable-equivalent basis)	1,090	1,163
Net interest income (taxable-equivalent basis), Percent change	-6.30%	'
Noninterest income	625	787
Noninterest income, Percent change	-20.60%	'
Securities gains (losses), net	'	'
Securities gains (losses), net, Percent change	'	'
Total net revenue	1,715	1,950
Total net revenue, Percent change	-12.10%	'
Noninterest expense, Percent change	-1.40%	'
Other intangibles, Percent change	-27.30%	'
Total noninterest expense, Percent change	-1.70%	'
Income before provision and income taxes, Percent change	-26.80%	'
Provision for credit losses, Percent change	-41.70%	'
Income before income taxes, Percent change	-20.90%	'
Income taxes and taxable-equivalent adjustment, Percent change	-20.90%	'
Net income, Percent change	-20.90%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'
Net income attributable to U.S. Bancorp, Percent change	-20.90%	'
Noninterest expense	1,116	1,132
Other intangibles	8	11
Total noninterest expense	1,124	1,143
Income before provision and income taxes	591	807
Provision for credit losses	133	228
Income before income taxes	458	579
Income taxes and taxable-equivalent adjustment	167	211
Net income	291	368
Net (income) loss attributable to noncontrolling interests	'	'
Net income attributable to U.S. Bancorp	291	368
Average Balance Sheet	'	'
Commercial	8,333	8,499
Commercial, Percent change	-2.00%	'
Commercial real estate	18,623	17,463
Commercial real estate, Percent change	6.60%	'
Residential mortgages	50,296	44,499
Residential mortgages, Percent change	13.00%	'
Credit card	'	'
Credit card, Percent change	'	'
Other retail	45,484	44,922
Other retail, Percent change	1.30%	'
Total loans, excluding covered loans	122,736	115,383
Total loans, excluding covered loans, Percent change	6.40%	'
Covered loans	6,048	6,928
Covered loans, Percent change	-12.70%	'
Total loans	128,784	122,311
Total loans, Percent change	5.30%	'
Goodwill, Percent change	'	'
Other intangible assets, Percent change	36.00%	'
Assets, Percent change	1.00%	'
Noninterest-bearing deposits, Percent change	2.80%	'
Interest checking, Percent change	7.60%	'
Savings products, Percent change	5.50%	'
Time deposits, Percent change	-16.60%	'
Total deposits, Percent change	1.50%	'
Total U.S. Bancorp shareholders' equity, Percent change	-3.90%	'
Goodwill	3,515	3,515
Other intangible assets	2,741	2,015
Assets	141,694	140,229
Noninterest-bearing deposits	21,945	21,352
Interest checking	34,851	32,386
Savings products	48,060	45,570
Time deposits	18,708	22,444
Total deposits	123,564	121,752
Total U.S. Bancorp shareholders' equity	11,569	12,040
Wealth Management and Securities Services [Member]	'	'
Condensed Income Statement	'	'
Net interest income (taxable-equivalent basis)	83	88
Net interest income (taxable-equivalent basis), Percent change	-5.70%	'
Noninterest income	330	294
Noninterest income, Percent change	12.20%	'
Securities gains (losses), net	'	'
Securities gains (losses), net, Percent change	'	'
Total net revenue	413	382
Total net revenue, Percent change	8.10%	'
Noninterest expense, Percent change	3.80%	'
Other intangibles, Percent change	'	'
Total noninterest expense, Percent change	3.60%	'
Income before provision and income taxes, Percent change	35.80%	'
Provision for credit losses, Percent change	'	'
Income before income taxes, Percent change	43.40%	'
Income taxes and taxable-equivalent adjustment, Percent change	47.40%	'
Net income, Percent change	41.20%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'
Net income attributable to U.S. Bancorp, Percent change	41.20%	'
Noninterest expense	332	320
Other intangibles	9	9
Total noninterest expense	341	329
Income before provision and income taxes	72	53
Provision for credit losses	-4	'
Income before income taxes	76	53
Income taxes and taxable-equivalent adjustment	28	19
Net income	48	34
Net (income) loss attributable to noncontrolling interests	'	'
Net income attributable to U.S. Bancorp	48	34
Average Balance Sheet	'	'
Commercial	1,842	1,617
Commercial, Percent change	13.90%	'
Commercial real estate	616	655
Commercial real estate, Percent change	-6.00%	'
Residential mortgages	1,265	580
Residential mortgages, Percent change	'	'
Credit card	'	'
Credit card, Percent change	'	'
Other retail	1,472	1,553
Other retail, Percent change	-5.20%	'
Total loans, excluding covered loans	5,195	4,405
Total loans, excluding covered loans, Percent change	17.90%	'
Covered loans	7	9
Covered loans, Percent change	-22.20%	'
Total loans	5,202	4,414
Total loans, Percent change	17.90%	'
Goodwill, Percent change	2.40%	'
Other intangible assets, Percent change	-6.00%	'
Assets, Percent change	12.80%	'
Noninterest-bearing deposits, Percent change	4.30%	'
Interest checking, Percent change	15.70%	'
Savings products, Percent change	0.70%	'
Time deposits, Percent change	-30.10%	'
Total deposits, Percent change	-0.50%	'
Total U.S. Bancorp shareholders' equity, Percent change	-2.70%	'
Goodwill	1,565	1,528
Other intangible assets	171	182
Assets	8,217	7,286
Noninterest-bearing deposits	14,713	14,106
Interest checking	5,441	4,701
Savings products	27,084	26,890
Time deposits	4,165	5,961
Total deposits	51,403	51,658
Total U.S. Bancorp shareholders' equity	2,296	2,359
Payment Services [Member]	'	'
Condensed Income Statement	'	'
Net interest income (taxable-equivalent basis)	414	388
Net interest income (taxable-equivalent basis), Percent change	6.70%	'
Noninterest income	775	747
Noninterest income, Percent change	3.70%	'
Securities gains (losses), net	'	'
Securities gains (losses), net, Percent change	'	'
Total net revenue	1,189	1,135
Total net revenue, Percent change	4.80%	'
Noninterest expense, Percent change	4.70%	'
Other intangibles, Percent change	-11.40%	'
Total noninterest expense, Percent change	3.80%	'
Income before provision and income taxes, Percent change	5.80%	'
Provision for credit losses, Percent change	-2.00%	'
Income before income taxes, Percent change	10.50%	'
Income taxes and taxable-equivalent adjustment, Percent change	10.40%	'
Net income, Percent change	10.50%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'
Net income attributable to U.S. Bancorp, Percent change	11.00%	'
Noninterest expense	577	551
Other intangibles	31	35
Total noninterest expense	608	586
Income before provision and income taxes	581	549
Provision for credit losses	201	205
Income before income taxes	380	344
Income taxes and taxable-equivalent adjustment	138	125
Net income	242	219
Net (income) loss attributable to noncontrolling interests	-9	-9
Net income attributable to U.S. Bancorp	233	210
Average Balance Sheet	'	'
Commercial	5,997	5,860
Commercial, Percent change	2.30%	'
Commercial real estate	'	'
Commercial real estate, Percent change	'	'
Residential mortgages	'	'
Residential mortgages, Percent change	'	'
Credit card	17,407	16,528
Credit card, Percent change	5.30%	'
Other retail	697	763
Other retail, Percent change	-8.70%	'
Total loans, excluding covered loans	24,101	23,151
Total loans, excluding covered loans, Percent change	4.10%	'
Covered loans	5	5
Covered loans, Percent change	'	'
Total loans	24,106	23,156
Total loans, Percent change	4.10%	'
Goodwill, Percent change	0.40%	'
Other intangible assets, Percent change	-17.20%	'
Assets, Percent change	3.20%	'
Noninterest-bearing deposits, Percent change	0.90%	'
Interest checking, Percent change	25.60%	'
Savings products, Percent change	48.90%	'
Time deposits, Percent change	'	'
Total deposits, Percent change	11.90%	'
Total U.S. Bancorp shareholders' equity, Percent change	-4.90%	'
Goodwill	2,519	2,508
Other intangible assets	507	612
Assets	30,372	29,444
Noninterest-bearing deposits	698	692
Interest checking	540	430
Savings products	70	47
Time deposits	'	'
Total deposits	1,308	1,169
Total U.S. Bancorp shareholders' equity	5,669	5,961
Treasury and Corporate Support [Member]	'	'
Condensed Income Statement	'	'
Net interest income (taxable-equivalent basis)	629	576
Net interest income (taxable-equivalent basis), Percent change	9.20%	'
Noninterest income	127	52
Noninterest income, Percent change	'	'
Securities gains (losses), net	5	5
Securities gains (losses), net, Percent change	'	'
Total net revenue	761	633
Total net revenue, Percent change	20.20%	'
Noninterest expense, Percent change	62.50%	'
Other intangibles, Percent change	'	'
Total noninterest expense, Percent change	62.50%	'
Income before provision and income taxes, Percent change	11.90%	'
Provision for credit losses, Percent change	'	'
Income before income taxes, Percent change	14.30%	'
Income taxes and taxable-equivalent adjustment, Percent change	-27.60%	'
Net income, Percent change	21.50%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'
Net income attributable to U.S. Bancorp, Percent change	8.00%	'
Noninterest expense	169	104
Total noninterest expense	169	104
Income before provision and income taxes	592	529
Provision for credit losses	-6	6
Income before income taxes	598	523
Income taxes and taxable-equivalent adjustment	55	76
Net income	543	447
Net (income) loss attributable to noncontrolling interests	-6	50
Net income attributable to U.S. Bancorp	537	497
Average Balance Sheet	'	'
Commercial	171	190
Commercial, Percent change	-10.00%	'
Commercial real estate	245	112
Commercial real estate, Percent change	'	'
Residential mortgages	1	1
Residential mortgages, Percent change	'	'
Credit card	'	'
Credit card, Percent change	'	'
Other retail	'	'
Other retail, Percent change	'	'
Total loans, excluding covered loans	417	303
Total loans, excluding covered loans, Percent change	37.60%	'
Covered loans	2,022	3,613
Covered loans, Percent change	-44.00%	'
Total loans	2,439	3,916
Total loans, Percent change	-37.70%	'
Goodwill, Percent change	'	'
Other intangible assets, Percent change	-50.00%	'
Assets, Percent change	2.10%	'
Noninterest-bearing deposits, Percent change	'	'
Interest checking, Percent change	'	'
Savings products, Percent change	6.30%	'
Time deposits, Percent change	98.10%	'
Total deposits, Percent change	'	'
Total U.S. Bancorp shareholders' equity, Percent change	26.00%	'
Goodwill	'	'
Other intangible assets	1	2
Assets	101,780	99,708
Noninterest-bearing deposits	1,250	342
Interest checking	1	1
Savings products	102	96
Time deposits	1,648	832
Total deposits	3,001	1,271
Total U.S. Bancorp shareholders' equity	$14,700	$11,667

Investment_Securities_Investme2

Investment Securities - Investment Securities Held to Maturity (Detail) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	$40,712	[1]	$38,920	[1]
Held-to-maturity securities, Unrealized Gains	225		205
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	-1		-1
Held-to-maturity securities, Unrealized Losses Other	-547		-756
Held-to-maturity securities, Fair Value	40,389		38,368
U.S. Treasury and agencies [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	1,984		3,114
Held-to-maturity securities, Unrealized Gains	3		5
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	-59		-79
Held-to-maturity securities, Fair Value	1,928		3,040
Mortgage-backed securities Residential [Member] | Agency [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	38,593		35,671
Held-to-maturity securities, Unrealized Gains	209		187
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	-476		-665
Held-to-maturity securities, Fair Value	38,326		35,193
Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	1		1
Held-to-maturity securities, Unrealized Gains	'		'
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	'		'
Held-to-maturity securities, Fair Value	1		1
Collateralized Debt/Loan Obligation Asset-Backed Securities [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	'		'
Held-to-maturity securities, Unrealized Gains	9		9
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	'		'
Held-to-maturity securities, Fair Value	9		9
Asset-backed securities Other [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	15		16
Held-to-maturity securities, Unrealized Gains	4		4
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	-1		-1
Held-to-maturity securities, Unrealized Losses Other	-1		-1
Held-to-maturity securities, Fair Value	17		18
Obligations of state and political subdivisions [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	11		12
Held-to-maturity securities, Unrealized Gains	'		'
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	'		'
Held-to-maturity securities, Fair Value	11		12
Obligations of foreign governments [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	9		7
Held-to-maturity securities, Unrealized Gains	'		'
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	'		'
Held-to-maturity securities, Fair Value	9		7
Other debt securities [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	99		99
Held-to-maturity securities, Unrealized Gains	'		'
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	-11		-11
Held-to-maturity securities, Fair Value	$88		$88
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Investment_Securities_Investme3

Investment Securities - Investment Securities Available for Sale (Detail) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	$44,589		$41,059
Available-for-sale securities, Unrealized Gains	768		651
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-8		-13
Available-for-sale securities, Unrealized Losses Other	-588		-762
Available-for-sale securities, Fair Value	44,761	[1]	40,935	[1]
U.S. Treasury and agencies [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	1,104		1,108
Available-for-sale securities, Unrealized Gains	4		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-46		-67
Available-for-sale securities, Fair Value	1,062		1,045
Mortgage-backed securities Residential [Member] | Agency [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	35,426		31,633
Available-for-sale securities, Unrealized Gains	498		449
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-440		-529
Available-for-sale securities, Fair Value	35,484		31,553
Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	466		486
Available-for-sale securities, Unrealized Gains	7		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-5		-8
Available-for-sale securities, Unrealized Losses Other	-3		-4
Available-for-sale securities, Fair Value	465		478
Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	290		297
Available-for-sale securities, Unrealized Gains	10		5
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-3		-5
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	297		297
Commercial [Member] | Agency [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	140		148
Available-for-sale securities, Unrealized Gains	4		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	144		152
Collateralized Debt/Loan Obligation Asset-Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	19		20
Available-for-sale securities, Unrealized Gains	5		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	24		24
Asset-backed securities Other [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	615		616
Available-for-sale securities, Unrealized Gains	13		13
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	628		629
Obligations of state and political subdivisions [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	5,432		5,673
Available-for-sale securities, Unrealized Gains	174		116
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-21		-51
Available-for-sale securities, Fair Value	5,585		5,738
Obligations of foreign governments [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	6		6
Available-for-sale securities, Unrealized Gains	'		'
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	6		6
Corporate debt securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	735		734
Available-for-sale securities, Unrealized Gains	'		'
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-65		-94
Available-for-sale securities, Fair Value	670		640
Perpetual preferred securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	205		205
Available-for-sale securities, Unrealized Gains	26		24
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-13		-17
Available-for-sale securities, Fair Value	218		212
Other Investment [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	151		133
Available-for-sale securities, Unrealized Gains	27		28
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	$178		$161
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Investment_Securities_Investme4

Investment Securities - Investment Securities Available for Sale (Parenthetical) (Detail)	Mar. 31, 2014
	CreditScore
Investments Debt And Equity Securities [Abstract]	'
Minimum weighted average credit score of prime securities	725
Maximum loan-to-value of prime securities	80.00%

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Investments Debt And Equity Securities [Abstract]	'	'
Weighted-average maturity of the available-for-sale investment securities (in years)	'5 years 4 months 24 days	'6 years
Weighted-average yields of available-for-sale investment securities	2.52%	2.64%
Weighted-average maturity of the held-to-maturity investment securities (in years)	'4 years 6 months	'4 years 6 months
Weighted-average yields of held-to-maturity investment securities	2.00%	2.00%
Fair value of securities pledged	$13,700,000,000	$17,300,000,000
Fair value of securities pledged as collateral where counterparty has right to repledge or resell	$652,000,000	$2,100,000,000

Investment_Securities_Summary_

Investment Securities - Summary of Information about Amount of Interest Income from Taxable and Non-Taxable Investment Securities (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Taxable And Tax Exempt Interest Income [Abstract]	'	'
Taxable	$381	$344
Non-taxable	60	66
Total interest income from investment securities	$441	$410

Investment_Securities_Summary_1

Investment Securities - Summary of Information about Amount of Gross Gains and Losses Realized through Sales of Available-for-sale Investment Securities (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Investments Debt And Equity Securities [Abstract]	'	'
Realized gains	$5	$12
Realized losses	'	'
Net realized gains (losses)	5	12
Income tax (benefit) on net realized gains (losses)	$2	$5

Investment_Securities_Summary_2

Investment Securities - Summary of Other-than-Temporary Impairment by Investment Category (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Other Gains (Losses)	'	$6
Available-for-Sale Securities [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Losses Recorded in Earnings	'	-7
Other Gains (Losses)	'	6
Total Available for sale other-than-temporary impairment	'	-1
Available-for-Sale Securities [Member] | Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Losses Recorded in Earnings	'	-1
Other Gains (Losses)	'	1
Total Available for sale other-than-temporary impairment	'	'
Available-for-Sale Securities [Member] | Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'
Losses Recorded in Earnings	'	-6
Other Gains (Losses)	'	5
Total Available for sale other-than-temporary impairment	'	($1)

Investment_Securities_Summary_3

Investment Securities - Summary of Ranges Used in Valuation of Non-Agency Mortgage-Backed Securities Other Than Temporarily Impaired (Detail)	3 Months Ended
	Mar. 31, 2014
Prime Minimum [Member]	'
Principal Valuation Assumptions Debt Securities Other Than Temporarily Impaired [Line Items]	'
Estimated lifetime prepayment rates	20.00%
Lifetime probability of default rates	5.00%
Lifetime loss severity rates	45.00%
Prime Maximum [Member]	'
Principal Valuation Assumptions Debt Securities Other Than Temporarily Impaired [Line Items]	'
Estimated lifetime prepayment rates	20.00%
Lifetime probability of default rates	5.00%
Lifetime loss severity rates	45.00%
Prime Average [Member]	'
Principal Valuation Assumptions Debt Securities Other Than Temporarily Impaired [Line Items]	'
Estimated lifetime prepayment rates	20.00%
Lifetime probability of default rates	5.00%
Lifetime loss severity rates	45.00%

Investment_Securities_Changes_

Investment Securities - Changes in Credit Losses on Debt Securities (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Investments Debt And Equity Securities [Abstract]	'	'
Balance at beginning of period	$116	$134
Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized	'	7
Total other-than-temporary impairment on debt securities	'	7
Increases in expected cash flows	-2	'
Realized losses	-3	-8
Balance at end of period	$111	$133

Investment_Securities_Schedule

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value of Company's Investment Securities with Unrealized Losses (Detail) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	$23,462
Unrealized Losses Less Than 12 Months	-491
Fair Value 12 Months or Greater	1,224
Unrealized Losses 12 Months or Greater	-57
Fair Value Total	24,686
Unrealized Losses Total	-548
Fair Value Less Than 12 Months	16,011
Unrealized Losses Less Than 12 Months	-382
Fair Value 12 Months or Greater	3,540
Unrealized Losses 12 Months or Greater	-214
Fair Value Total	19,551
Unrealized Losses Total	-596
U.S. Treasury and agencies [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	1,012
Unrealized Losses Less Than 12 Months	-59
Fair Value 12 Months or Greater	'
Unrealized Losses 12 Months or Greater	'
Fair Value Total	1,012
Unrealized Losses Total	-59
Fair Value Less Than 12 Months	845
Unrealized Losses Less Than 12 Months	-41
Fair Value 12 Months or Greater	95
Unrealized Losses 12 Months or Greater	-5
Fair Value Total	940
Unrealized Losses Total	-46
Mortgage-backed securities Residential [Member] | Agency [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	22,447
Unrealized Losses Less Than 12 Months	-432
Fair Value 12 Months or Greater	1,202
Unrealized Losses 12 Months or Greater	-44
Fair Value Total	23,649
Unrealized Losses Total	-476
Fair Value Less Than 12 Months	14,566
Unrealized Losses Less Than 12 Months	-323
Fair Value 12 Months or Greater	2,580
Unrealized Losses 12 Months or Greater	-117
Fair Value Total	17,146
Unrealized Losses Total	-440
Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	47
Unrealized Losses Less Than 12 Months	-1
Fair Value 12 Months or Greater	175
Unrealized Losses 12 Months or Greater	-7
Fair Value Total	222
Unrealized Losses Total	-8
Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	33
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	44
Unrealized Losses 12 Months or Greater	-3
Fair Value Total	77
Unrealized Losses Total	-3
Asset-backed securities Other [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	'
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	10
Unrealized Losses 12 Months or Greater	-2
Fair Value Total	10
Unrealized Losses Total	-2
Fair Value Less Than 12 Months	23
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	3
Unrealized Losses 12 Months or Greater	'
Fair Value Total	26
Unrealized Losses Total	'
Obligations of state and political subdivisions [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	3
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	'
Unrealized Losses 12 Months or Greater	'
Fair Value Total	3
Unrealized Losses Total	'
Fair Value Less Than 12 Months	441
Unrealized Losses Less Than 12 Months	-17
Fair Value 12 Months or Greater	81
Unrealized Losses 12 Months or Greater	-4
Fair Value Total	522
Unrealized Losses Total	-21
Other debt securities [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	'
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	12
Unrealized Losses 12 Months or Greater	-11
Fair Value Total	12
Unrealized Losses Total	-11
Obligations of foreign governments [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	6
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	'
Unrealized Losses 12 Months or Greater	'
Fair Value Total	6
Unrealized Losses Total	'
Corporate debt securities [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	50
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	442
Unrealized Losses 12 Months or Greater	-65
Fair Value Total	492
Unrealized Losses Total	-65
Perpetual preferred securities [Member]	'
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Fair Value Less Than 12 Months	'
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	120
Unrealized Losses 12 Months or Greater	-13
Fair Value Total	120
Unrealized Losses Total	($13)

Investment_Securities_Schedule1

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value of Company's Investment Securities with Unrealized Losses (Parenthetical) (Detail) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Schedule Of Fair Value And Gross Unrealized Losses [Abstract]	'
Unrealized Losses Total	$11

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses - Composition of Loan Portfolio (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounts Notes And Loans Receivable Classified [Abstract]	'	'
Commercial	$68,556	$64,762
Lease financing	5,145	5,271
Total commercial	73,701	70,033
Commercial Real Estate	'	'
Commercial mortgages	31,878	32,183
Construction and development	8,253	7,702
Total commercial real estate	40,131	39,885
Residential mortgages	38,316	37,545
Home equity loans, first liens	13,392	13,611
Total residential mortgages	51,708	51,156
Credit Card	17,129	18,021
Retail leasing	6,009	5,929
Home equity and second mortgages	15,261	15,442
Revolving credit	3,187	3,276
Installment	5,751	5,709
Automobile	13,933	13,743
Student	3,466	3,579
Total other retail	47,607	47,678
Total loans, excluding covered loans	230,276	226,773
Covered loans	8,099	8,462
Total loans	$238,375	$235,235
Commercial, Percentage	28.80%	27.50%
Lease financing, Percentage	2.10%	2.30%
Total commercial, Percentage	30.90%	29.80%
Commercial mortgages, Percentage	13.40%	13.70%
Construction and development, Percentage	3.40%	3.30%
Total commercial real estate, Percentage	16.80%	17.00%
Residential mortgages, Percentage	16.10%	15.90%
Home equity loans, first liens, Percentage	5.60%	5.80%
Total residential mortgages, Percentage	21.70%	21.70%
Credit Card, Percentage	7.20%	7.70%
Retail leasing, Percentage	2.50%	2.50%
Home equity and second mortgages, Percentage	6.40%	6.60%
Revolving credit, Percentage	1.30%	1.40%
Installment, Percentage	2.40%	2.40%
Automobile, Percentage	5.90%	5.80%
Student, Percentage	1.50%	1.50%
Total other retail, Percentage	20.00%	20.20%
Total loans, excluding covered loans, Percentage	96.60%	96.40%
Covered Loans, Percentage	3.40%	3.60%
Total loans, Percentage	100.00%	100.00%

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
	MortgageLoan
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Loans pledged at the Federal Home Loan Bank ("FHLB")	$76,800,000,000	$77,200,000,000
Loans pledged at the Federal Reserve Bank	56,700,000,000	53,000,000,000
Unearned interest and deferred fees and costs on loans	584,000,000	556,000,000
Minimum period for non collection of principal and interest placed on nonaccrual status for commercial lending segment loans	'90 days	'
Minimum period beyond which revolving consumer lines and credit cards are charged off	'180 days	'
Minimum period beyond which residential mortgages and other retail loans secured by 1-4 family properties are charged down to fair value of the collateral securing the loan less costs to sell	'180 days	'
Minimum period beyond which other retail loans not secured by 1-4 family properties are charged off	'120 days	'
Foreclosed residential real estate property included in other real estate owned	283,000,000	'
Foreclosed residential real estate property included in other real estate owned excluding covered assets	250,000,000	'
Foreclosed residential real estate related to mortgage loans whose payments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs	540,000,000	'
Residential mortgage loans secured by residential real estate in process of foreclosure	3,400,000,000	'
Maximum restructuring period under credit card loan financial difficulty modifications	'60 months	'
Maximum restructuring period under credit card loan temporary financial hardship modifications	'Up to 12 months	'
Number of residential mortgage loans, home equity and second mortgage loans, and GNMA loans where trial period arrangement was unsuccessful	176	'
Outstanding balance of residential mortgage loans, home equity and second mortgage loans, and GNMA loans where trial period was unsuccessful and no longer eligible for a permanent modification	23,000,000	'
Purchased impaired loans included in covered loans classified as nonperforming assets	4,000,000	5,000,000
Commercial Lending Segment [Member] | Maximum [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Period for capturing full economic cycle in evaluation	'13 years	'
Commercial Lending Segment [Member] | Minimum [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Impairment loan threshold for allowance in which loans are individually analyzed	5,000,000	'
Junior Lien [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Loans and lines in a junior lien position secured by 1-4 family properties placed on nonaccrual status	'120 days	'
First Lien [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Loans and lines in a junior lien position placed on nonaccrual status when behind a first lien past due	'180 days	'
Government National Mortgage Association [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Residential real estate in process of foreclosure secured by residential mortgage loans purchased from Government National Mortgage Association mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs	2,400,000,000	'
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Number of loans in trial period	227	'
Outstanding balance of loans in trial period	27,000,000	'
Estimated post-modification balance of loans in trial period	28,000,000	'
Home equity and second mortgage loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Number of loans in trial period	21	'
Outstanding balance of loans in trial period	1,000,000	'
Estimated post-modification balance of loans in trial period	1,000,000	'
Loans Purchased from GNMA Mortgage Pools [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Number of loans in trial period	1,657	'
Outstanding balance of loans in trial period	204,000,000	'
Estimated post-modification balance of loans in trial period	$194,000,000	'

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses - Changes in Accretable Balance for Purchased Impaired Loans (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Deteriorated Loans Transferred in [Abstract]	'	'
Balance at beginning of period	$1,655	$1,709
Accretion	-111	-136
Disposals	-40	-38
Reclassifications from nonaccretable difference	81	10
Other	-1	376
Balance at end of period	$1,584	$1,921

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses - Activity in Allowance for Credit Losses (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	$4,537	$4,733
Provision for credit losses	306	403
Loans charged off	422	549
Less recoveries of loans charged off	-81	-116
Net loans charged off	341	433
Other changes	-5	5
Balance at end of period	4,497	4,708
Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	1,075	1,051
Provision for credit losses	52	-4
Loans charged off	63	56
Less recoveries of loans charged off	-27	-21
Net loans charged off	36	35
Other changes	'	'
Balance at end of period	1,091	1,012
Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	776	857
Provision for credit losses	-37	-40
Loans charged off	8	43
Less recoveries of loans charged off	-11	-24
Net loans charged off	-3	19
Other changes	'	'
Balance at end of period	742	798
Residential Mortgages [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	875	935
Provision for credit losses	44	83
Loans charged off	61	100
Less recoveries of loans charged off	-4	-8
Net loans charged off	57	92
Other changes	'	'
Balance at end of period	862	926
Credit Card [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	884	863
Provision for credit losses	170	192
Loans charged off	184	193
Less recoveries of loans charged off	-14	-33
Net loans charged off	170	160
Other changes	'	'
Balance at end of period	884	895
Other Retail [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	781	848
Provision for credit losses	80	132
Loans charged off	100	156
Less recoveries of loans charged off	-24	-30
Net loans charged off	76	126
Other changes	'	'
Balance at end of period	785	854
Total Loans, Excluding Covered Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	4,391	4,554
Provision for credit losses	309	363
Loans charged off	416	548
Less recoveries of loans charged off	-80	-116
Net loans charged off	336	432
Other changes	'	'
Balance at end of period	4,364	4,485
Covered Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Balance at beginning of period	146	179
Provision for credit losses	-3	40
Loans charged off	6	1
Less recoveries of loans charged off	-1	'
Net loans charged off	5	1
Other changes	-5	5
Balance at end of period	$133	$223

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses - Additional Detail of Allowance for Credit Losses and Related Loan Balances by Portfolio Type (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	$31	$32	'	'
TDRs collectively evaluated for impairment	500	520	'	'
Other loans collectively evaluated for impairment	3,802	3,815	'	'
Loans acquired with deteriorated credit quality	164	170	'	'
Total allowance for credit losses	4,497	4,537	4,708	4,733
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	578	496	'	'
TDRs collectively evaluated for impairment	6,249	6,243	'	'
Other loans collectively evaluated for impairment	227,770	224,557	'	'
Loans acquired with deteriorated credit quality	3,778	3,939	'	'
Total loans	230,276	226,773	'	'
Total loans	238,375	235,235	'	'
Commercial [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	19	15	'	'
TDRs collectively evaluated for impairment	15	19	'	'
Other loans collectively evaluated for impairment	1,057	1,041	'	'
Loans acquired with deteriorated credit quality	'	'	'	'
Total allowance for credit losses	1,091	1,075	1,012	1,051
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	282	197	'	'
TDRs collectively evaluated for impairment	136	155	'	'
Other loans collectively evaluated for impairment	73,281	69,680	'	'
Loans acquired with deteriorated credit quality	2	1	'	'
Total loans	73,701	70,033	'	'
Commercial Real Estate [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	12	17	'	'
TDRs collectively evaluated for impairment	20	26	'	'
Other loans collectively evaluated for impairment	674	700	'	'
Loans acquired with deteriorated credit quality	36	33	'	'
Total allowance for credit losses	742	776	798	857
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	214	237	'	'
TDRs collectively evaluated for impairment	327	358	'	'
Other loans collectively evaluated for impairment	39,452	39,129	'	'
Loans acquired with deteriorated credit quality	138	161	'	'
Total loans	40,131	39,885	'	'
Residential Mortgages [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	333	329	'	'
Other loans collectively evaluated for impairment	529	546	'	'
Loans acquired with deteriorated credit quality	'	'	'	'
Total allowance for credit losses	862	875	926	935
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	5,142	5,064	'	'
Other loans collectively evaluated for impairment	46,565	46,090	'	'
Loans acquired with deteriorated credit quality	1	2	'	'
Total loans	51,708	51,156	'	'
Credit Card [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	77	87	'	'
Other loans collectively evaluated for impairment	807	797	'	'
Loans acquired with deteriorated credit quality	'	'	'	'
Total allowance for credit losses	884	884	895	863
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	289	310	'	'
Other loans collectively evaluated for impairment	16,840	17,711	'	'
Loans acquired with deteriorated credit quality	'	'	'	'
Total loans	17,129	18,021	'	'
Other Retail [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	51	55	'	'
Other loans collectively evaluated for impairment	734	726	'	'
Loans acquired with deteriorated credit quality	'	'	'	'
Total allowance for credit losses	785	781	854	848
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	263	269	'	'
Other loans collectively evaluated for impairment	47,344	47,409	'	'
Loans acquired with deteriorated credit quality	'	'	'	'
Total loans	47,607	47,678	'	'
Total Loans, Excluding Covered Loans [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	31	32	'	'
TDRs collectively evaluated for impairment	496	516	'	'
Other loans collectively evaluated for impairment	3,801	3,810	'	'
Loans acquired with deteriorated credit quality	36	33	'	'
Total allowance for credit losses	4,364	4,391	4,485	4,554
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	496	434	'	'
TDRs collectively evaluated for impairment	6,157	6,156	'	'
Other loans collectively evaluated for impairment	223,482	220,019	'	'
Loans acquired with deteriorated credit quality	141	164	'	'
Total loans	230,276	226,773	'	'
Covered Loans [Member]	'	'	'	'
Allowance Balance at End of Period	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'
TDRs collectively evaluated for impairment	4	4	'	'
Other loans collectively evaluated for impairment	1	5	'	'
Loans acquired with deteriorated credit quality	128	137	'	'
Total allowance for credit losses	133	146	223	179
Loan balance at end of period	'	'	'	'
Loans individually evaluated for impairment	82	62	'	'
TDRs collectively evaluated for impairment	92	87	'	'
Other loans collectively evaluated for impairment	4,288	4,538	'	'
Loans acquired with deteriorated credit quality	3,637	3,775	'	'
Total loans	$8,099	$8,462	'	'

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Deliquency Status (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	$234,454	$231,097
Accruing 30-89 Days Past Due	1,135	1,346
Accruing 90 Days or More Past Due	1,167	1,189
Nonperforming	1,619	1,603
Total loans, excluding covered loans	230,276	226,773
Total loans	238,375	235,235
Commercial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	73,257	69,587
Accruing 30-89 Days Past Due	210	257
Accruing 90 Days or More Past Due	46	55
Nonperforming	188	134
Total loans, excluding covered loans	73,701	70,033
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	39,780	39,459
Accruing 30-89 Days Past Due	58	94
Accruing 90 Days or More Past Due	24	29
Nonperforming	269	303
Total loans, excluding covered loans	40,131	39,885
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	50,294	49,695
Accruing 30-89 Days Past Due	306	358
Accruing 90 Days or More Past Due	331	333
Nonperforming	777	770
Total loans, excluding covered loans	51,708	51,156
Credit Card [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	16,653	17,507
Accruing 30-89 Days Past Due	203	226
Accruing 90 Days or More Past Due	208	210
Nonperforming	65	78
Total loans, excluding covered loans	17,129	18,021
Other Retail [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	47,131	47,156
Accruing 30-89 Days Past Due	202	245
Accruing 90 Days or More Past Due	86	86
Nonperforming	188	191
Total loans, excluding covered loans	47,607	47,678
Total Loans, Excluding Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	227,115	223,404
Accruing 30-89 Days Past Due	979	1,180
Accruing 90 Days or More Past Due	695	713
Nonperforming	1,487	1,476
Total loans, excluding covered loans	230,276	226,773
Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	7,339	7,693
Accruing 30-89 Days Past Due	156	166
Accruing 90 Days or More Past Due	472	476
Nonperforming	132	127
Total loans	$8,099	$8,462

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Deliquency Status (Parenthetical) (Detail) (Government National Mortgage Association [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
Government National Mortgage Association [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Loans 30-89 days past due purchased from Government National Mortgage Association mortgage pools whose payments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified as current	$417,000,000	$440,000,000
Loans 90 days or more past due purchased from Government National Mortgage Association mortgage pools whose payments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified as current	$3,600,000,000	$3,700,000,000

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Company's Internal Credit Quality Rating (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	$230,276	$226,773
Total loans	238,375	235,235
Total outstanding commitments	484,463	477,797
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	232,481	229,546
Total outstanding commitments	476,506	470,046
Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1,683	1,679
Total outstanding commitments	2,871	2,939
Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	4,211	4,010
Total outstanding commitments	5,086	4,812
Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	5,894	5,689
Total outstanding commitments	7,957	7,751
Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	73,701	70,033
Commercial [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	71,544	68,075
Commercial [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,111	1,013
Commercial [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,046	945
Commercial [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	2,157	1,958
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	40,131	39,885
Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	38,520	38,113
Commercial Real Estate [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	538	616
Commercial Real Estate [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,073	1,156
Commercial Real Estate [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,611	1,772
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	51,708	51,156
Residential Mortgages [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	50,521	50,152
Residential Mortgages [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	4	5
Residential Mortgages [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,183	999
Residential Mortgages [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,187	1,004
Credit Card [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	17,129	18,021
Credit Card [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	16,856	17,733
Credit Card [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	'	'
Credit Card [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	273	288
Credit Card [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	273	288
Other Retail [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	47,607	47,678
Other Retail [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	47,228	47,313
Other Retail [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	24	27
Other Retail [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	355	338
Other Retail [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	379	365
Total Loans, Excluding Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	230,276	226,773
Total Loans, Excluding Covered Loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	224,669	221,386
Total Loans, Excluding Covered Loans [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,677	1,661
Total Loans, Excluding Covered Loans [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	3,930	3,726
Total Loans, Excluding Covered Loans [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	5,607	5,387
Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	8,099	8,462
Covered Loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	7,812	8,160
Covered Loans [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	6	18
Covered Loans [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	281	284
Covered Loans [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	$287	$302

Recovered_Sheet1

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Company's Internal Credit Quality Rating (Parenthetical) (Detail) (Government National Mortgage Association [Member], Trouble Debt Restructure [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Government National Mortgage Association [Member] | Trouble Debt Restructure [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Restructured GNMA loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified with a pass rating	$2.70	$2.60
GNMA loans 90 days or more past due whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified with a pass rating	$3.60	$3.70

Recovered_Sheet2

Loans and Allowance for Credit Losses - Summary of Impaired Loans by Portfolio Class (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	$7,628	$7,602
Unpaid Principal Balance	10,100	10,136
Valuation Allowance	565	599
Commitments to Lend Additional Funds	93	112
Commercial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	452	382
Unpaid Principal Balance	879	804
Valuation Allowance	35	36
Commitments to Lend Additional Funds	37	54
Commercial Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	628	693
Unpaid Principal Balance	1,218	1,322
Valuation Allowance	39	51
Commitments to Lend Additional Funds	49	40
Residential Mortgages [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	2,739	2,767
Unpaid Principal Balance	3,645	3,492
Valuation Allowance	297	308
Commitments to Lend Additional Funds	'	'
Credit Card [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	289	310
Unpaid Principal Balance	289	310
Valuation Allowance	77	87
Commitments to Lend Additional Funds	'	'
Other Retail [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	385	391
Unpaid Principal Balance	433	593
Valuation Allowance	55	59
Commitments to Lend Additional Funds	4	14
Total Impaired Loans, Excluding GNMA and Covered Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	4,493	4,543
Unpaid Principal Balance	6,464	6,521
Valuation Allowance	503	541
Commitments to Lend Additional Funds	90	108
Loans Purchased from GNMA Mortgage Pools [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	2,716	2,607
Unpaid Principal Balance	2,716	2,607
Valuation Allowance	40	28
Commitments to Lend Additional Funds	'	'
Covered Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	419	452
Unpaid Principal Balance	920	1,008
Valuation Allowance	22	30
Commitments to Lend Additional Funds	$3	$4

Recovered_Sheet3

Loans and Allowance for Credit Losses - Impaired Loans Average Recorded Investment and Interest Income (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	$7,615	$7,560
Interest Income Recognized	91	95
Commercial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	417	391
Interest Income Recognized	2	10
Commercial Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	660	1,055
Interest Income Recognized	9	11
Residential Mortgages [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	2,753	2,728
Interest Income Recognized	35	34
Credit Card [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	300	418
Interest Income Recognized	3	4
Other Retail [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	388	443
Interest Income Recognized	4	6
Total Impaired Loans, Excluding GNMA and Covered Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	4,518	5,035
Interest Income Recognized	53	65
Loans Purchased from GNMA Mortgage Pools [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	2,662	1,844
Interest Income Recognized	33	23
Covered Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Average Recorded Investment	435	681
Interest Income Recognized	$5	$7

Recovered_Sheet4

Loans and Allowance for Credit Losses - Loans Modified as TDRs (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	11,341	12,674
Pre-Modification Outstanding Loan Balance	$487	$551
Post-Modification Outstanding Loan Balance	469	536
Commercial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	619	815
Pre-Modification Outstanding Loan Balance	79	34
Post-Modification Outstanding Loan Balance	77	33
Commercial Real Estate [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	15	63
Pre-Modification Outstanding Loan Balance	11	80
Post-Modification Outstanding Loan Balance	8	78
Residential Mortgages [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	528	807
Pre-Modification Outstanding Loan Balance	70	110
Post-Modification Outstanding Loan Balance	70	105
Credit Card [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	6,816	7,818
Pre-Modification Outstanding Loan Balance	40	48
Post-Modification Outstanding Loan Balance	40	48
Other Retail [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	787	1,865
Pre-Modification Outstanding Loan Balance	21	49
Post-Modification Outstanding Loan Balance	20	49
Total Loans, Excluding GNMA and Covered Loans [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	8,765	11,368
Pre-Modification Outstanding Loan Balance	221	321
Post-Modification Outstanding Loan Balance	215	313
Loans Purchased from GNMA Mortgage Pools [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	2,563	1,256
Pre-Modification Outstanding Loan Balance	257	177
Post-Modification Outstanding Loan Balance	246	182
Covered Loans [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	13	50
Pre-Modification Outstanding Loan Balance	9	53
Post-Modification Outstanding Loan Balance	$8	$41

Recovered_Sheet5

Loans and Allowance for Credit Losses - Schedule of Loans Modified as TDRs that have Subsequently been Fully or Partially Charged-Off or Became 90 Days or More Past Due (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	2,024	6,705
Amount Defaulted	$61	$581
Commercial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	145	168
Amount Defaulted	5	2
Commercial Real Estate [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	6	19
Amount Defaulted	7	28
Residential Mortgages [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	148	183
Amount Defaulted	22	31
Credit Card [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	1,461	1,986
Amount Defaulted	8	11
Other Retail [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	185	517
Amount Defaulted	6	28
Total Loans, Excluding GNMA and Covered Loans [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	1,945	2,873
Amount Defaulted	48	100
Loans Purchased from GNMA Mortgage Pools [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	71	3,822
Amount Defaulted	10	478
Covered Loans [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Loans	8	10
Amount Defaulted	$3	$3

Recovered_Sheet6

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	$3,637	$3,775
Purchased Nonimpaired Loans	2,982	3,087
Other Assets	1,553	1,697
Covered loans	8,099	8,462
Total covered assets	8,172	8,559
Commercial [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	28	32
Other Assets	'	'
Covered loans	28	32
Commercial Real Estate [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	649	738
Purchased Nonimpaired Loans	1,450	1,494
Other Assets	'	'
Covered loans	2,099	2,232
Residential Mortgages [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	2,988	3,037
Purchased Nonimpaired Loans	855	890
Other Assets	'	'
Covered loans	3,843	3,927
Credit Card [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	5	5
Other Assets	'	'
Covered loans	5	5
Other Retail [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	644	666
Other Assets	'	'
Covered loans	644	666
Losses Reimbursable by FDIC [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	'	'
Other Assets	772	798
Covered loans	772	798
Unamortized Changes in FDIC asset [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	'	'
Other Assets	708	802
Covered loans	708	802
Covered Loans [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	3,637	3,775
Purchased Nonimpaired Loans	2,982	3,087
Other Assets	1,480	1,600
Covered loans	8,099	8,462
Foreclosed Real Estate [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	'	'
Other Assets	73	97
Total covered assets	$73	$97

Recovered_Sheet7

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
Loss sharing agreement remaining term	'5 years

Accounting_for_Transfers_and_S2

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Minimum [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Aggregate amount of investments in unconsolidated VIEs	$1,000,000	'	$1,000,000
Maximum [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Aggregate amount of investments in unconsolidated VIEs	34,000,000	'	37,000,000
Conduit [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Assets related to consolidated VIEs	115,000,000	'	116,000,000
Tender Option Bond Program [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Assets related to consolidated VIEs	4,500,000,000	'	4,600,000,000
Liabilities related to consolidated VIEs	4,300,000,000	'	4,600,000,000
Community Development and Tax Advantaged Investments [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Federal and state income tax credits recognized in tax expense	178,000,000	167,000,000	'
Expense related to investments	164,000,000	212,000,000	'
Expenses related to investments recognized in tax expense	71,000,000	80,000,000	'
Investment tax credits	103,000,000	69,000,000	'
Assets related to consolidated VIEs	2,500,000,000	'	2,500,000,000
Liabilities related to consolidated VIEs	1,900,000,000	'	1,800,000,000
Investment carrying amount	4,036,000,000	'	4,178,000,000
Maximum exposure to loss	7,453,000,000	'	7,390,000,000
Private Investment Funds And Partnerships [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Investment carrying amount	99,000,000	'	98,000,000
Maximum exposure to loss	$107,000,000	'	$107,000,000

Accounting_for_Transfers_and_S3

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities - Summary of Investments in Community Development and Tax-advantaged VIEs (Detail) (Community Development and Tax Advantaged Investments [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Community Development and Tax Advantaged Investments [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Investment carrying amount	$4,036	$4,178
Unfunded capital and other commitments	1,532	1,661
Maximum exposure to loss	$7,453	$7,390

Mortgage_Servicing_Rights_Addi

Mortgage Servicing Rights - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Transfers And Servicing Of Financial Assets [Abstract]	'	'	'
Residential mortgage loans serviced for others including subserviced mortgages with no corresponding MSRs asset	$227,200,000,000	'	$226,800,000,000
Gain/Loss on the fair value of mortgage servicing rights and fair value changes of derivatives used to offset MSR	58,000,000	41,000,000	'
Loan servicing fees	$188,000,000	$187,000,000	'

Mortgage_Servicing_Rights_Chan

Mortgage Servicing Rights - Changes in Fair Value of Capitalized MSRs (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Transfers And Servicing Of Financial Assets [Abstract]	'	'
Balance at beginning of period	$2,680	$1,700
Rights purchased	1	2
Rights capitalized	84	254
Changes in fair value of MSRs	'	'
Due to fluctuations in market interest rates	-76	127
Due to revised assumptions or models	12	-6
Other changes in fair value	-83	-122
Balance at end of period	$2,618	$1,955

Mortgage_Servicing_Rights_Sens

Mortgage Servicing Rights - Sensitivity to Changes in Interest Rates to Fair Value of MSRs Portfolio and Related Derivative Instruments (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Down Scenario [Member] | MSR Portfolio [Member]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]	'	'
Net fair value 100 basis points	($463)	($435)
Net fair value 50 basis points	-210	-199
Net fair value 25 basis points	-97	-93
Down Scenario [Member] | Derivative instrument hedges [Member]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]	'	'
Net fair value 100 basis points	409	399
Net fair value 50 basis points	201	194
Net fair value 25 basis points	96	91
Down Scenario [Member] | Net sensitivity [Member]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]	'	'
Net fair value 100 basis points	-54	-36
Net fair value 50 basis points	-9	-5
Net fair value 25 basis points	-1	-2
Up Scenario [Member] | MSR Portfolio [Member]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]	'	'
Net fair value 100 basis points	297	287
Net fair value 50 basis points	159	154
Net fair value 25 basis points	85	82
Up Scenario [Member] | Derivative instrument hedges [Member]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]	'	'
Net fair value 100 basis points	-287	-301
Net fair value 50 basis points	-156	-157
Net fair value 25 basis points	-84	-82
Up Scenario [Member] | Net sensitivity [Member]	'	'
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]	'	'
Net fair value 100 basis points	10	-14
Net fair value 50 basis points	3	-3
Net fair value 25 basis points	$1	'

Mortgage_Servicing_Rights_MSRs

Mortgage Servicing Rights - MSRs and Related Characteristics by Portfolio (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	BasisPoint	Multiple
	Multiple	BasisPoint
Servicing Assets at Fair Value [Line Items]	'	'	'	'
Servicing portfolio	$224,637	$226,842	'	'
Fair value	2,618	2,680	1,955	1,700
Value (bps)	117	118	'	'
Weighted-average servicing fees (bps)	30	30	'	'
Multiple (value/servicing fees)	3.9	3.93	'	'
Weighted-average note rate	4.21%	4.22%	'	'
Weighted-average age (in years)	'2 years 9 months 18 days	'2 years 7 months 6 days	'	'
Weighted-average expected prepayment (constant prepayment rate)	11.40%	11.20%	'	'
Weighted-average expected life (in years)	'6 years 10 months 24 days	'7 years 1 month 6 days	'	'
Weighted-average discount rate	10.20%	10.20%	'	'
MRBP [Member]	'	'	'	'
Servicing Assets at Fair Value [Line Items]	'	'	'	'
Servicing portfolio	16,459	15,896	'	'
Fair value	188	180	'	'
Value (bps)	114	113	'	'
Weighted-average servicing fees (bps)	39	39	'	'
Multiple (value/servicing fees)	2.92	2.9	'	'
Weighted-average note rate	4.67%	4.70%	'	'
Weighted-average age (in years)	'3 years 9 months 18 days	'3 years 9 months 18 days	'	'
Weighted-average expected prepayment (constant prepayment rate)	13.30%	13.50%	'	'
Weighted-average expected life (in years)	'6 years 2 months 12 days	'6 years 2 months 12 days	'	'
Weighted-average discount rate	11.90%	11.90%	'	'
Government [Member]	'	'	'	'
Servicing Assets at Fair Value [Line Items]	'	'	'	'
Servicing portfolio	41,550	41,659	'	'
Fair value	485	500	'	'
Value (bps)	117	120	'	'
Weighted-average servicing fees (bps)	32	32	'	'
Multiple (value/servicing fees)	3.66	3.75	'	'
Weighted-average note rate	4.23%	4.24%	'	'
Weighted-average age (in years)	'2 years 9 months 18 days	'2 years 7 months 6 days	'	'
Weighted-average expected prepayment (constant prepayment rate)	11.80%	11.50%	'	'
Weighted-average expected life (in years)	'6 years 8 months 12 days	'6 years 10 months 24 days	'	'
Weighted-average discount rate	11.20%	11.20%	'	'
Conventional [Member]	'	'	'	'
Servicing Assets at Fair Value [Line Items]	'	'	'	'
Servicing portfolio	166,628	169,287	'	'
Fair value	$1,945	$2,000	'	'
Value (bps)	117	118	'	'
Weighted-average servicing fees (bps)	29	29	'	'
Multiple (value/servicing fees)	4.03	4.07	'	'
Weighted-average note rate	4.16%	4.17%	'	'
Weighted-average age (in years)	'2 years 8 months 12 days	'2 years 6 months	'	'
Weighted-average expected prepayment (constant prepayment rate)	11.10%	10.90%	'	'
Weighted-average expected life (in years)	'7 years	'7 years 2 months 12 days	'	'
Weighted-average discount rate	9.80%	9.80%	'	'

Preferred_Stock_Additional_Inf

Preferred Stock - Additional Information (Detail)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Class of Stock Disclosures [Abstract]	'	'
Number of preferred stock, shares authorized	50	50

Preferred_Stock_Number_of_Shar

Preferred Stock - Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Class of Stock [Line Items]	'	'
Shares Issued and Outstanding	159,910	159,910
Liquidation Preference	$4,936	$4,936
Discount	180	180
Carrying Amount	4,756	4,756
Series A [Member]	'	'
Class of Stock [Line Items]	'	'
Shares Issued and Outstanding	12,510	12,510
Liquidation Preference	1,251	1,251
Discount	145	145
Carrying Amount	1,106	1,106
Series B [Member]	'	'
Class of Stock [Line Items]	'	'
Shares Issued and Outstanding	40,000	40,000
Liquidation Preference	1,000	1,000
Discount	'	'
Carrying Amount	1,000	1,000
Series F [Member]	'	'
Class of Stock [Line Items]	'	'
Shares Issued and Outstanding	44,000	44,000
Liquidation Preference	1,100	1,100
Discount	12	12
Carrying Amount	1,088	1,088
Series G [Member]	'	'
Class of Stock [Line Items]	'	'
Shares Issued and Outstanding	43,400	43,400
Liquidation Preference	1,085	1,085
Discount	10	10
Carrying Amount	1,075	1,075
Series H [Member]	'	'
Class of Stock [Line Items]	'	'
Shares Issued and Outstanding	20,000	20,000
Liquidation Preference	500	500
Discount	13	13
Carrying Amount	$487	$487

Preferred_Stock_Number_of_Shar1

Preferred Stock - Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock (Parenthetical) (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Equity [Abstract]	'	'
Preferred stock, par value	$1	$1

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Loss) - Reconciliation of Transactions Affecting Accumulated Other Comprehensive Income (Loss) Included in Shareholders' Equity (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Balance at beginning of period	($1,071)	($923)
Changes in unrealized gains and losses	301	-120
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Derivative Hedges	-11	-3
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Retirement Plans	'	-1
Changes in unrealized gains and losses	290	-124
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	6
Foreign currency translation adjustment	-4	-10
Reclassification to earnings of realized gains and losses	73	91
Applicable income taxes	-138	19
Balance at end of period	-850	-941
Foreign Currency Translation [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Balance at beginning of period	-60	-40
Changes in unrealized gains and losses	'	'
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	'
Foreign currency translation adjustment	-4	-10
Reclassification to earnings of realized gains and losses	'	'
Applicable income taxes	1	4
Balance at end of period	-63	-46
Unrealized Gains (Losses) on Retirement Plans [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Balance at beginning of period	-743	-1,265
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Retirement Plans	'	-1
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	'
Foreign currency translation adjustment	'	'
Reclassification to earnings of realized gains and losses	36	62
Applicable income taxes	-14	-17
Balance at end of period	-721	-1,221
Unrealized Gains (Losses) on Derivative Hedges [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Balance at beginning of period	-261	-404
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Derivative Hedges	-11	-3
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	'
Foreign currency translation adjustment	'	'
Reclassification to earnings of realized gains and losses	49	54
Applicable income taxes	-15	-18
Balance at end of period	-238	-371
Unrealized Gains (Losses) on Securities Transferred From Available For Sale to Held To Maturity [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Balance at beginning of period	70	107
Changes in unrealized gains and losses	'	'
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	'
Foreign currency translation adjustment	'	'
Reclassification to earnings of realized gains and losses	-7	-20
Applicable income taxes	3	7
Balance at end of period	66	94
Unrealized Gains (Losses) on Securities Available-For-Sale [Member]	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Balance at beginning of period	-77	679
Changes in unrealized gains and losses	301	-120
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	6
Foreign currency translation adjustment	'	'
Reclassification to earnings of realized gains and losses	-5	-5
Applicable income taxes	-113	43
Balance at end of period	$106	$603

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Loss) - Impact to Net Income for Items Reclassified out of Accumulated Other Comprehensive Income and into Earnings (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Realized gains (losses) on sale of securities	$5	$12
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Interest income	3,022	3,111
Gains (Losses) on derivative hedges	2,650	2,653
Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization	-289	-310
Total securities gains (losses), net	5	5
Applicable income taxes	-496	-558
Net income	1,412	1,387
Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Net income	-45	-55
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Securities Available-For-Sale [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Realized gains (losses) on sale of securities	5	12
Other-than-temporary impairment recognized in earnings	'	-7
Total securities gains (losses), net	5	5
Applicable income taxes	-2	-2
Net income	3	3
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Securities Transferred From Available For Sale to Held To Maturity [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Interest income	7	20
Applicable income taxes	-3	-7
Net income	4	13
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Derivative Hedges [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Gains (Losses) on derivative hedges	-49	-54
Applicable income taxes	19	21
Net income	-30	-33
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Retirement Plans [Member]	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'
Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization	-36	-62
Applicable income taxes	14	24
Net income	($22)	($38)

Earnings_Per_Share_Components_

Earnings Per Share - Components of Earnings Per Share (Detail) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Net income attributable to U.S. Bancorp	$1,397	$1,428
Preferred dividends	-60	-64
Earnings allocated to participating stock awards	-6	-6
Net income applicable to U.S. Bancorp common shareholders	$1,331	$1,358
Average common shares outstanding	1,818	1,858
Net effect of the exercise and assumed purchase of stock awards	10	9
Average diluted common shares outstanding	1,828	1,867
Earnings per common share	$0.73	$0.73
Diluted earnings per common share	$0.73	$0.73

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail) (Stock Option [Member])	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013
Stock Option [Member]	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'
Options outstanding of common shares	11

Employee_Benefits_Components_o

Employee Benefits - Components of Net Periodic Benefit Cost (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Pension Plans [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Service cost	$38	$42
Interest cost	49	42
Expected return on plan assets	-52	-44
Prior service cost (credit) and transition obligation (asset) amortization	-1	-1
Actuarial loss (gain) amortization	40	66
Net periodic benefit cost	74	105
Postretirement Welfare Plan [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Service cost	'	1
Interest cost	1	1
Expected return on plan assets	'	'
Prior service cost (credit) and transition obligation (asset) amortization	-1	'
Actuarial loss (gain) amortization	-2	-3
Net periodic benefit cost	($2)	($1)

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Federal	'	'
Current	$490	$490
Deferred	-67	12
Federal income tax	423	502
State	'	'
Current	83	58
Deferred	-10	-2
State income tax	73	56
Applicable income taxes	$496	$558

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Billions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Income Taxes Additional Information [Abstract]	'	'
Federal statutory rate	35.00%	'
Net deferred tax liability	$1.50	$1.30

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Expected Income Tax Expense at Federal Statutory Rate of 35 Percent to Company's Applicable Income Tax Expense (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]	'	'
Tax at statutory rate	$668	$681
State income tax, at statutory rates, net of federal tax benefit	43	36
Tax effect of	'	'
Tax credits and benefits, net of related expenses	-165	-106
Tax-exempt income	-52	-54
Noncontrolling interests	-5	14
Other items	7	-13
Applicable income taxes	$496	$558

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Mar. 31, 2015
			Scenario, Forecast [Member]	Scenario, Forecast [Member]
Derivative [Line Items]	'	'	'	'
Realized and unrealized losses on derivatives classified as cash flow hedges recorded in other comprehensive income (loss)	$238,000,000	$261,000,000	'	'
Estimated loss to be reclassified from other comprehensive income (loss) into earnings	'	'	88,000,000	119,000,000
Forward commitments to sell mortgage loans	4,500,000,000	'	'	'
Hedged mortgage loans held for sale	1,500,000,000	'	'	'
Unfunded mortgage loan commitments	3,800,000,000	'	'	'
Fair value of derivatives under collateral agreements in a net liability position	965,000,000	'	'	'
Collateral posted by company netted against net liability position	$804,000,000	'	'	'

Derivative_Instruments_Asset_a

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivative [Line Items]	'	'
Fair Value, Assets	$1,218	$1,349
Fair Value, Liabilities	1,485	1,598
Asset and Liability Management Positions [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	25,494	28,119
Fair Value, Assets	125	189
Notional Value, Liabilities	13,650	14,730
Fair Value, Liabilities	475	580
Asset and Liability Management Positions [Member] | Fair Value Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	500	500
Fair Value, Assets	17	22
Derivative Asset Average Remaining Maturity Period	'1 year 10 months 2 days	'2 years 1 month 2 days
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Asset and Liability Management Positions [Member] | Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	7,000	7,000
Fair Value, Assets	22	26
Derivative Asset Average Remaining Maturity Period	'7 months 6 days	'10 months 2 days
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Asset and Liability Management Positions [Member] | Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	272	772
Fair Value, Assets	17	26
Derivative Asset Average Remaining Maturity Period	'8 years 6 months 7 days	'6 years 3 months
Notional Value, Liabilities	5,462	4,288
Fair Value, Liabilities	451	498
Derivative Liability Average Remaining Maturity Period	'2 years 6 months 11 days	'2 years 5 months 16 days
Asset and Liability Management Positions [Member] | Net Investment Hedges [Member] | Foreign Exchange Forward Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,082	'
Fair Value, Assets	9	'
Derivative Asset Average Remaining Maturity Period	'15 days	'
Notional Value, Liabilities	'	1,056
Fair Value, Liabilities	'	4
Derivative Liability Average Remaining Maturity Period	'	'15 days
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	3,375	'
Fair Value, Assets	5	'
Derivative Asset Average Remaining Maturity Period	'10 years 2 months 23 days	'
Notional Value, Liabilities	100	3,540
Fair Value, Liabilities	'	56
Derivative Liability Average Remaining Maturity Period	'10 years 2 months 23 days	'10 years 2 months 19 days
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,259	2,310
Fair Value, Assets	13	9
Derivative Asset Average Remaining Maturity Period	'26 days	'26 days
Notional Value, Liabilities	1,526	1,025
Fair Value, Liabilities	1	7
Derivative Liability Average Remaining Maturity Period	'15 days	'22 days
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,345	5,234
Fair Value, Assets	7	58
Derivative Asset Average Remaining Maturity Period	'1 month 10 days	'29 days
Notional Value, Liabilities	2,119	346
Fair Value, Liabilities	9	4
Derivative Liability Average Remaining Maturity Period	'1 month 2 days	'2 months 1 day
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	3,250	2,300
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'26 days	'26 days
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,427	1,902
Fair Value, Assets	27	17
Derivative Asset Average Remaining Maturity Period	'29 days	'26 days
Notional Value, Liabilities	6	2
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'26 days	'29 days
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Foreign Exchange Forward Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,618	6,813
Fair Value, Assets	3	24
Derivative Asset Average Remaining Maturity Period	'4 days	'7 days
Notional Value, Liabilities	2,230	2,121
Fair Value, Liabilities	8	4
Derivative Liability Average Remaining Maturity Period	'11 days	'7 days
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Equity Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	68	79
Fair Value, Assets	1	3
Derivative Asset Average Remaining Maturity Period	'1 year 4 months 17 days	'1 year 7 months 13 days
Notional Value, Liabilities	9	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'1 year 2 months 19 days	'
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Credit Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,298	1,209
Fair Value, Assets	4	4
Derivative Asset Average Remaining Maturity Period	'3 years 10 months 6 days	'4 years 15 days
Notional Value, Liabilities	2,198	2,352
Fair Value, Liabilities	$6	$7
Derivative Liability Average Remaining Maturity Period	'3 years 1 month 21 days	'3 years 29 days

Derivative_Instruments_Custome

Derivative Instruments - Customer-Related Derivative Positions of Company (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivative [Line Items]	'	'
Fair Value, Assets	$1,218	$1,349
Fair Value, Liabilities	1,485	1,598
Customer-Related Positions [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	36,440	33,286
Fair Value, Assets	1,159	1,215
Derivative Asset Average Remaining Maturity Period	'	'
Notional Value, Liabilities	36,611	33,480
Fair Value, Liabilities	1,088	1,137
Derivative Liability Average Remaining Maturity Period	'	'
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	13,905	11,717
Fair Value, Assets	622	600
Derivative Asset Average Remaining Maturity Period	'5 years 5 months 5 days	'5 years 1 month 10 days
Notional Value, Liabilities	6,082	7,291
Fair Value, Liabilities	52	106
Derivative Liability Average Remaining Maturity Period	'5 years 4 days	'5 years 6 months 26 days
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	5,700	6,746
Fair Value, Assets	61	114
Derivative Asset Average Remaining Maturity Period	'4 years 9 months	'6 years 11 days
Notional Value, Liabilities	14,226	12,361
Fair Value, Liabilities	590	560
Derivative Liability Average Remaining Maturity Period	'5 years 5 months 5 days	'4 years 10 months 24 days
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	3,249	3,489
Fair Value, Assets	18	33
Derivative Asset Average Remaining Maturity Period	'4 years 6 months 15 days	'4 years 6 months 11 days
Notional Value, Liabilities	26	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'3 years 2 months 1 day	'
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Options [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	26	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'3 years 2 months 1 day	'
Notional Value, Liabilities	3,249	3,489
Fair Value, Liabilities	18	33
Derivative Liability Average Remaining Maturity Period	'4 years 6 months 15 days	'4 years 6 months 11 days
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Futures [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	'	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'	'
Notional Value, Liabilities	124	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'2 months 16 days	'
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Futures [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	787	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'1 year 3 months 15 days	'
Notional Value, Liabilities	421	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'1 year 1 month 17 days	'
Customer-Related Positions [Member] | Foreign Exchange Rate Contracts [Member] | Options [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	724	364
Fair Value, Assets	13	11
Derivative Asset Average Remaining Maturity Period	'6 months 29 days	'6 months 11 days
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Customer-Related Positions [Member] | Foreign Exchange Rate Contracts [Member] | Options [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	'	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'	'
Notional Value, Liabilities	724	364
Fair Value, Liabilities	13	11
Derivative Liability Average Remaining Maturity Period	'6 months 29 days	'6 months 11 days
Customer-Related Positions [Member] | Foreign Exchange Rate Contracts [Member] | Forwards, Spots and Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	12,049	10,970
Fair Value, Assets	445	457
Derivative Asset Average Remaining Maturity Period	'7 months 2 days	'7 months 2 days
Notional Value, Liabilities	11,759	9,975
Fair Value, Liabilities	$415	$427
Derivative Liability Average Remaining Maturity Period	'6 months 29 days	'7 months 13 days

Derivative_Instruments_Summary

Derivative Instruments - Summary of Effective Portion of Gains (Losses) Recognized in Other Comprehensive Income (Loss) and Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings (Detail) (Asset and Liability Management Positions [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash Flow Hedges [Member] | Interest Rate Contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Derivative Instruments, Gain (Losses) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	($7)	'
Derivative Instruments, Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	-30	-33
Net Investment Hedges [Member] | Foreign Exchange Forward Contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Derivative Instruments, Gain (Losses) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	'	23
Derivative Instruments, Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	'	'

Derivative_Instruments_Summary1

Derivative Instruments - Summary of Gains (Losses) Recognized in Earnings for Fair Value Hedges, Other Economic Hedges and Customer-Related Positions (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Asset and Liability Management Positions [Member] | Interest Rate Contracts [Member] | Other noninterest income [Member] | Fair Value Hedges [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	($2)	($2)
Asset and Liability Management Positions [Member] | Interest Rate Contracts [Member] | Mortgage banking revenue [Member] | Other Economic Hedges [Member] | Futures and Forwards [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	-49	236
Asset and Liability Management Positions [Member] | Interest Rate Contracts [Member] | Mortgage banking revenue [Member] | Other Economic Hedges [Member] | Options [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	66	129
Asset and Liability Management Positions [Member] | Interest Rate Contracts [Member] | Mortgage banking revenue [Member] | Other Economic Hedges [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	109	-40
Asset and Liability Management Positions [Member] | Foreign Exchange Forward Contracts [Member] | Commercial products revenue [Member] | Other Economic Hedges [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	-5	8
Asset and Liability Management Positions [Member] | Credit Contracts [Member] | Other noninterest income/expense [Member] | Other Economic Hedges [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	'	-1
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Other noninterest income [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	134	-96
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Other noninterest income [Member] | Pay Fixed/Receive Floating Swaps [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	-129	96
Customer-Related Positions [Member] | Foreign Exchange Rate Contracts [Member] | Commercial products revenue [Member] | Forwards, Spots and Swaps [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gains (losses) recognized in earnings	$16	$7

Derivative_Instruments_Summary2

Derivative Instruments - Summary of Gains (Losses) Recognized in Earnings for Fair Value Hedges, Other Economic Hedges and Customer-Related Positions (Parenthetical) (Detail) (Asset and Liability Management Positions [Member], Interest Rate Contracts [Member], Fair Value Hedges [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Asset and Liability Management Positions [Member] | Interest Rate Contracts [Member] | Fair Value Hedges [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain losses on items hedged by fair value hedges	$2	$2

Netting_Arrangements_for_Certa2

Netting Arrangements for Certain Financial Instruments - Additional Information (Detail) (USD $)	Mar. 31, 2014
In Billions, unless otherwise specified
Derivatives, Fair Value [Line Items]	'
Notional amount of derivative	$112.20
Exchange Cleared [Member]	'
Derivatives, Fair Value [Line Items]	'
Notional amount of derivative	16.2
Exchange Traded [Member]	'
Derivatives, Fair Value [Line Items]	'
Notional amount of derivative	$5.80

Netting_Arrangements_for_Certa3

Netting Arrangements for Certain Financial Instruments - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet But Available for Offset in Event of Default (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]	'	'
Derivative assets Gross Recognized Assets	$1,218	$1,349
Reverse repurchase agreements Gross Recognized Assets	26	87
Securities borrowed Gross Recognized Assets	680	723
Total Gross Recognized Assets	1,924	2,159
Derivative assets Gross amounts assets offset in consolidated balance sheet	-470	-599
Total Gross amounts assets offset in consolidated balance sheet	-470	-599
Derivative assets Net Amounts Presented in the Consolidated Balance Sheet	748	750
Reverse repurchase agreements Net Amounts Presented in the Consolidated Balance Sheet	26	87
Securities borrowed Net Amounts Presented in the Consolidated Balance Sheet	680	723
Total Net Amounts Presented in the Consolidated Balance Sheet	1,454	1,560
Derivative assets Gross Amounts Not Offset Consolidated Balance Financial Instruments	-32	-21
Reverse repurchase agreements Gross financial instrument asset amounts not offset in consolidated balance sheet	-19	-59
Securities borrowed Gross financial instrument asset amounts not offset in consolidated balance sheet	'	'
Total Gross financial instrument asset amounts not offset in consolidated balance sheet	-51	-80
Reverse repurchase agreements Gross collateral received amounts not offset in consolidated balance sheet	-7	-28
Securities borrowed Gross collateral received amounts not offset in consolidated balance sheet	-660	-698
Total Gross collateral received amounts not offset in consolidated balance sheet	-667	-726
Derivative assets Net Amount	716	729
Reverse repurchase agreements Net Amount	'	'
Securities borrowed Net Amount	20	25
Total Net Amount Assets	736	754
Derivative liabilities Gross recognized liabilities	1,485	1,598
Repurchase agreements Gross recognized liabilities	699	2,059
Securities loaned Gross recognized liabilities	'	'
Total Gross recognized liabilities	2,184	3,657
Derivative liabilities Gross amounts liabilities offset in consolidated balance sheet	-1,138	-1,192
Total Gross amounts liabilities offset in consolidated balance sheet	-1,138	-1,192
Derivative liabilities Net amounts liabilities presented in consolidated balance sheet	347	406
Repurchase agreements Net amounts liabilities presented in consolidated balance sheet	699	2,059
Securities loaned Net amounts liabilities presented in consolidated balance sheet	'	'
Total Net amounts liabilities presented in consolidated balance sheet	1,046	2,465
Derivative liabilities Gross financial instrument liability amounts not offset in consolidated balance sheet	-32	-21
Repurchase agreements Gross financial instrument liability amounts not offset in consolidated balance sheet	-19	-59
Securities loaned Gross financial instruments not offset in consolidated balance sheet	'	'
Total Gross financial instrument liability amounts not offset in consolidated balance sheet	-51	-80
Repurchase agreements Gross collateral pledged amounts not offset in consolidated balance sheet	-680	-2,000
Securities loaned Gross collateral pledged amounts not offset in consolidated balance sheet	'	'
Total Gross collateral pledged amounts not offset in consolidated balance sheet	-680	-2,000
Derivative liabilities Net Amount	315	385
Repurchase agreements Net Amount	'	'
Securities loaned net Amount	'	'
Total Net Amount Liabilities	$315	$385

Netting_Arrangements_for_Certa4

Netting Arrangements for Certain Financial Instruments - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet But Available for Offset in Event of Default (Parenthetical) (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]	'	'
Cash collateral netted against derivative assets	$87	$124
Derivative assets not subject to netting arrangements	66	55
Cash collateral netted against derivative liabilities	754	717
Derivative liabilities not subject to netting arrangements	$78	$119

Fair_Values_of_Assets_and_Liab2

Fair Values of Assets and Liabilities - Additional Information (Detail) (USD $)	3 Months Ended						3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
			Standby Letters of Credit and Unfunded Commitments [Member]	Standby Letters of Credit and Unfunded Commitments [Member]	Other Guarantees [Member]	Other Guarantees [Member]	Minimum [Member]	Maximum [Member]	Average [Member]
Fair Value Disclosures [Abstract]	'	'	'	'	'	'	'	'	'
Fair value measurement transfers from one level to another	$0	$0	'	'	'	'	'	'	'
Mortgage loans held for sale measured at fair value gain (loss)	52	-175	'	'	'	'	'	'	'
Assumed credit valuation adjustment as percentage of underlying fair value of underlying derivative contracts	'	'	'	'	'	'	0.00%	100.00%	7.00%
Carrying value of guarantee obligations	'	'	$399	$382	$275	$278	'	'	'

Fair_Values_of_Assets_and_Liab3

Fair Values of Assets and Liabilities - Valuation Assumption Ranges for Level 3 Available -for-Sale Investment Securities (Detail)	Mar. 31, 2014
Minimum [Member] | Non-agency Prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	6.00%
Lifetime probability of default rates	'
Lifetime loss severity rates	15.00%
Discount margin	2.00%
Minimum [Member] | Non-agency Non-prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	2.00%
Lifetime probability of default rates	4.00%
Lifetime loss severity rates	15.00%
Discount margin	1.00%
Minimum [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	6.00%
Lifetime probability of default rates	5.00%
Lifetime loss severity rates	40.00%
Discount margin	7.00%
Maximum [Member] | Non-agency Prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	25.00%
Lifetime probability of default rates	7.00%
Lifetime loss severity rates	75.00%
Discount margin	5.00%
Maximum [Member] | Non-agency Non-prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	10.00%
Lifetime probability of default rates	12.00%
Lifetime loss severity rates	70.00%
Discount margin	5.00%
Maximum [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	6.00%
Lifetime probability of default rates	5.00%
Lifetime loss severity rates	40.00%
Discount margin	7.00%
Average [Member] | Non-agency Prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	14.00%
Lifetime probability of default rates	4.00%
Lifetime loss severity rates	40.00%
Discount margin	3.00%
Average [Member] | Non-agency Non-prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	6.00%
Lifetime probability of default rates	7.00%
Lifetime loss severity rates	53.00%
Discount margin	3.00%
Average [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	6.00%
Lifetime probability of default rates	5.00%
Lifetime loss severity rates	40.00%
Discount margin	7.00%

Fair_Values_of_Assets_and_Liab4

Fair Values of Assets and Liabilities - Valuation Assumption Ranges for MSRs (Detail)	Mar. 31, 2014	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	11.40%	11.20%
Discount rate	10.20%	10.20%
Minimum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	10.00%	'
Discount rate	10.00%	'
Maximum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	20.00%	'
Discount rate	14.00%	'
Average [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	11.00%	'
Discount rate	10.00%	'

Fair_Values_of_Assets_and_Liab5

Fair Values of Assets and Liabilities - Valuation Assumption Ranges for Derivative Commitments (Detail)	Mar. 31, 2014
Minimum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Expected loan close rate	43.00%
Inherent MSR value (basis points per loan)	0.48%
Maximum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Expected loan close rate	100.00%
Inherent MSR value (basis points per loan)	2.09%
Average [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Expected loan close rate	76.00%
Inherent MSR value (basis points per loan)	1.26%

Fair_Values_of_Assets_and_Liab6

Fair Values of Assets and Liabilities - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Derivative liabilities before netting	$1,485		$1,598		'	'
Derivative liabilities netting	-1,138		-1,192		'	'
Derivative assets before netting	1,218		1,349		'	'
Derivative assets netting	-470		-599		'	'
Available-for-sale securities	44,761	[1]	40,935	[1]	'	'
Mortgage loans held for sale	1,827		3,263		'	'
Mortgage servicing rights	2,618		2,680		1,955	1,700
Mortgage-backed securities Residential [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	35,484		31,553		'	'
Commercial [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	144		152		'	'
Fair Value, Measurements, Recurring [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Derivative liabilities total	425		525		'	'
Derivative assets total	814		805		'	'
Available-for-sale securities	44,761		40,935		'	'
Mortgage loans held for sale	1,827		3,263		'	'
Mortgage servicing rights	2,618		2,680		'	'
Other assets	974		731		'	'
Total	50,994		48,414		'	'
Short-term borrowings	674		663		'	'
Total	1,099		1,188		'	'
Fair Value, Measurements, Recurring [Member] | U.S. Treasury and agencies [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	1,062		1,045		'	'
Fair Value, Measurements, Recurring [Member] | Obligations of state and political subdivisions [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	5,585		5,738		'	'
Fair Value, Measurements, Recurring [Member] | Obligations of foreign governments [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	6		6		'	'
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	670		640		'	'
Fair Value, Measurements, Recurring [Member] | Perpetual preferred securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	218		212		'	'
Fair Value, Measurements, Recurring [Member] | Other Investment [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	178		161		'	'
Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	465		478		'	'
Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	297		297		'	'
Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	35,484		31,553		'	'
Fair Value, Measurements, Recurring [Member] | Commercial [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	144		152		'	'
Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	628		629		'	'
Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	24		24		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Derivative liabilities before netting	'		'		'	'
Derivative assets before netting	'		'		'	'
Available-for-sale securities	166		148		'	'
Mortgage loans held for sale	'		'		'	'
Mortgage servicing rights	'		'		'	'
Other assets	118		143		'	'
Total	284		291		'	'
Short-term borrowings	75		112		'	'
Total	75		112		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Treasury and agencies [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	7		7		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of state and political subdivisions [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of foreign governments [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Perpetual preferred securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	159		141		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Commercial [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Derivative liabilities before netting	1,503		1,647		'	'
Derivative assets before netting	742		889		'	'
Available-for-sale securities	43,759		39,940		'	'
Mortgage loans held for sale	1,827		3,263		'	'
Mortgage servicing rights	0		'		'	'
Other assets	856		588		'	'
Total	47,184		44,680		'	'
Short-term borrowings	599		551		'	'
Total	2,102		2,198		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Treasury and agencies [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	1,055		1,038		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of state and political subdivisions [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	5,585		5,738		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of foreign governments [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	6		6		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	661		631		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Perpetual preferred securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	218		212		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	19		20		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	35,484		31,553		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Commercial [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	144		152		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	563		566		'	'
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	24		24		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Derivative liabilities before netting	60		70		'	'
Derivative assets before netting	542		515		'	'
Available-for-sale securities	836		847		'	'
Mortgage loans held for sale	'		'		'	'
Mortgage servicing rights	2,618		2,680		'	'
Other assets	'		'		'	'
Total	3,996		4,042		'	'
Short-term borrowings	'		'		'	'
Total	60		70		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Treasury and agencies [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of state and political subdivisions [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of foreign governments [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	9		9		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Perpetual preferred securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	465		478		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	297		297		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Commercial [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	65		63		'	'
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Derivative liabilities netting	-1,138		-1,192		'	'
Derivative assets netting	-470		-599		'	'
Available-for-sale securities	'		'		'	'
Mortgage loans held for sale	'		'		'	'
Mortgage servicing rights	'		'		'	'
Other assets	'		'		'	'
Total	-470		-599		'	'
Short-term borrowings	'		'		'	'
Total	-1,138		-1,192		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Treasury and agencies [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of state and political subdivisions [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of foreign governments [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Perpetual preferred securities [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities Residential [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Commercial [Member] | Agency [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
Netting [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'	'
Available-for-sale securities	'		'		'	'
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Fair_Values_of_Assets_and_Liab7

Fair Values of Assets and Liabilities - Changes in Fair Value for All Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Non-agency Prime [Member] | Mortgage-backed securities Residential [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	$478	$624
Net Gains (Losses) Included in Net Income	'	-2
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	7	11
Purchases	'	'
Sales	'	'
Principal Payments	-20	-34
Issuances	'	'
Settlements	'	'
End of Period Balance	465	599
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	7	11
Non-agency Non-prime [Member] | Mortgage-backed securities Residential [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	297	355
Net Gains (Losses) Included in Net Income	-1	-7
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	7	14
Purchases	'	'
Sales	'	'
Principal Payments	-6	-12
Issuances	'	'
Settlements	'	'
End of Period Balance	297	350
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	7	14
Asset-backed securities Other [Member] | Asset-Backed Securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	63	15
Net Gains (Losses) Included in Net Income	1	1
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	1	'
Purchases	2	25
Sales	'	'
Principal Payments	-2	-1
Issuances	'	'
Settlements	'	'
End of Period Balance	65	40
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	1	'
Corporate debt securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	9	9
Net Gains (Losses) Included in Net Income	'	'
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	'	'
Purchases	'	'
Sales	'	'
Principal Payments	'	'
Issuances	'	'
Settlements	'	'
End of Period Balance	9	9
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	'	'
Mortgage servicing rights [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	2,680	1,700
Net Gains (Losses) Included in Net Income	-147	-1
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	'	'
Purchases	1	2
Sales	'	'
Principal Payments	'	'
Issuances	84	254
Settlements	'	'
End of Period Balance	2,618	1,955
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	-147	-1
Derivative [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	445	1,179
Net Gains (Losses) Included in Net Income	185	147
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	'	'
Purchases	1	1
Sales	'	-1
Principal Payments	'	'
Issuances	'	'
Settlements	-149	-340
End of Period Balance	482	986
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	60	71
Available-for-Sale Securities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning of Period Balance	847	1,003
Net Gains (Losses) Included in Net Income	'	-8
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	15	25
Purchases	2	25
Sales	'	'
Principal Payments	-28	-47
Issuances	'	'
Settlements	'	'
End of Period Balance	836	998
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	$15	$25

Fair_Values_of_Assets_and_Liab8

Fair Values of Assets and Liabilities - Changes in Fair Value for All Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Parenthetical) (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other noninterest income [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Net gains and losses on net derivative assets and liabilities included in net income	$81	($3)
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	21	-88
Mortgage banking revenue [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Net gains and losses on net derivative assets and liabilities included in net income	104	150
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	39	159
Securities Gains Losses [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Net gains and losses on available for sale securities included in net income	'	-7
Interest Income [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Net gains and losses on available for sale securities included in net income	'	($1)

Fair_Values_of_Assets_and_Liab9

Fair Values of Assets and Liabilities - Adjusted Carrying Values for Assets Measured at Fair Value on Nonrecurring Basis (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Loans	$67	$128
Other assets	51	150
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Loans	'	'
Other assets	'	'
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Loans	'	'
Other assets	'	'
Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Loans	67	128
Other assets	$51	$150

Recovered_Sheet8

Fair Values of Assets and Liabilities - Losses Recognized Related to Nonrecurring Fair Value Measurements of Individual Assets or Portfolios (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]	'	'
Loans	$16	$21
Other assets	$19	$39

Recovered_Sheet9

Fair Values of Assets and Liabilities - Differences Between Aggregate Fair Value, Carrying Amount of MLHFS and Aggregate Unpaid Principal Amount (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Fair value carrying amount, total loans	$1,827	$3,263
Fair value carrying amount, nonaccrual loans	10	9
Fair value carrying amount, loans 90 days or more past due	2	'
Aggregate unpaid principal, total loans	1,764	3,195
Aggregate unpaid principal, nonaccrual loans	15	14
Aggregate unpaid principal, loans 90 days or more past due	2	'
Carrying amount over (under) unpaid principal, total loans	63	68
Carrying amount over (under) unpaid principal, nonaccrual loans	-5	-5
Carrying amount over (under) unpaid principal, loans 90 days or more past due	'	'

Recovered_Sheet10

Fair Values of Assets and Liabilities - Estimated Fair Values of Financial Instruments (Detail) (USD $)	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Financial Assets	'		'		'	'
Cash and due from banks	$7,408		$8,477		$6,932	$8,252
Investment securities held-to-maturity	40,712	[1]	38,920	[1]	'	'
Financial Liabilities	'		'		'	'
Deposits	260,612		262,123		'	'
Long-term debt	23,774		20,049		'	'
Carrying Amount [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	7,408		8,477		'	'
Federal funds sold and securities purchased under resale agreements	56		163		'	'
Investment securities held-to-maturity	40,712		38,920		'	'
Loans held for sale	16		5		'	'
Loans	234,119		230,857		'	'
Other financial instruments	2,307		2,443		'	'
Financial Liabilities	'		'		'	'
Deposits	260,612		262,123		'	'
Short-term borrowings	30,107		26,945		'	'
Long-term debt	23,774		20,049		'	'
Other Liabilities	1,253		1,263		'	'
Fair Value [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	7,408		8,477		'	'
Federal funds sold and securities purchased under resale agreements	56		163		'	'
Investment securities held-to-maturity	40,389		38,368		'	'
Loans held for sale	16		5		'	'
Loans	235,218		231,480		'	'
Other financial instruments	2,318		2,463		'	'
Financial Liabilities	'		'		'	'
Deposits	260,623		262,200		'	'
Short-term borrowings	30,001		26,863		'	'
Long-term debt	24,127		20,391		'	'
Other Liabilities	1,253		1,263		'	'
Fair Value [Member] | Level 1 [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	7,408		8,477		'	'
Federal funds sold and securities purchased under resale agreements	'		'		'	'
Investment securities held-to-maturity	1,443		2,589		'	'
Loans held for sale	'		'		'	'
Loans	'		'		'	'
Other financial instruments	'		'		'	'
Financial Liabilities	'		'		'	'
Deposits	'		'		'	'
Short-term borrowings	'		'		'	'
Long-term debt	'		'		'	'
Other Liabilities	'		'		'	'
Fair Value [Member] | Level 2 [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	'		'		'	'
Federal funds sold and securities purchased under resale agreements	56		163		'	'
Investment securities held-to-maturity	38,847		35,678		'	'
Loans held for sale	'		'		'	'
Loans	'		'		'	'
Other financial instruments	954		1,080		'	'
Financial Liabilities	'		'		'	'
Deposits	260,623		262,200		'	'
Short-term borrowings	30,001		26,863		'	'
Long-term debt	24,127		20,391		'	'
Other Liabilities	'		'		'	'
Fair Value [Member] | Level 3 [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	'		'		'	'
Federal funds sold and securities purchased under resale agreements	'		'		'	'
Investment securities held-to-maturity	99		101		'	'
Loans held for sale	16		5		'	'
Loans	235,218		231,480		'	'
Other financial instruments	1,364		1,383		'	'
Financial Liabilities	'		'		'	'
Deposits	'		'		'	'
Short-term borrowings	'		'		'	'
Long-term debt	'		'		'	'
Other Liabilities	$1,253		$1,263		'	'
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Guarantees_and_Contingent_Liab2

Guarantees and Contingent Liabilities - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Guarantees And Contingent Liabilities (Textual) [Abstract]	'	'	'	'
Liability related to remaining Visa Litigation, carrying amount	$24,000,000	'	'	'
Representation and warranty reserve	75,000,000	83,000,000	233,000,000	240,000,000
Loss contingency range of possible loss maximum	200,000,000	'	'	'
Merchant processing [Member]	'	'	'	'
Guarantees And Contingent Liabilities (Textual) [Abstract]	'	'	'	'
Value of airline tickets purchased to deliver at future date	8,600,000,000	'	'	'
Company held collateral in escrow deposits, letters of credit and indemnities from financial institutions and liens on various assets	690,000,000	'	'	'
Asset sales [Member]	'	'	'	'
Guarantees And Contingent Liabilities (Textual) [Abstract]	'	'	'	'
Representation and warranty reserve	75,000,000	83,000,000	'	'
Unresolved representation and warranty claims	$44,000,000	$89,000,000	'	'

Guarantees_and_Contingent_Liab3

Guarantees and Contingent Liabilities - Summary of Other Guarantees and Contingent Liabilities (Detail) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Standby letters of credit [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	69
Maximum Potential Future Payments	16,638
Third-party borrowing arrangements [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	'
Maximum Potential Future Payments	16
Securities lending indemnifications [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	5,008
Carrying Amount	'
Maximum Potential Future Payments	4,902
Asset sales [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	183
Maximum Potential Future Payments	3,786
Merchant processing [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	839
Carrying Amount	71
Maximum Potential Future Payments	85,817
Contingent consideration arrangements [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	11
Maximum Potential Future Payments	12
Tender option bond program guarantee [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	4,455
Carrying Amount	'
Maximum Potential Future Payments	4,349
Minimum revenue guarantees [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	10
Maximum Potential Future Payments	10
Other [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	'
Maximum Potential Future Payments	$374

Guarantees_and_Contingent_Liab4

Guarantees and Contingent Liabilities - Company's Representation and Warranty Reserve (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Valuation And Qualifying Accounts [Abstract]	'	'
Representation and Warranty Reserve, Beginning Balance	$83	$240
Net realized losses	-10	-23
Additions to reserve	2	16
Representation and Warranty Reserve, Ending Balance	$75	$233