U.S. Bancorp (USB) 10-Q 6 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
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	'	1,789,386,385

Consolidated_Balance_Sheet_Una

Consolidated Balance Sheet (Unaudited) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Assets	'		'
Cash and due from banks	$6,183		$8,477
Investment securities	'		'
Held-to-maturity (fair value $44,094 and $38,368, respectively; including $366 and $994 at fair value pledged as collateral, respectively)	44,231	[1]	38,920	[1]
Available-for-sale ($274 and $1,106 pledged as collateral, respectively)	52,674	[1]	40,935	[1]
Loans held for sale (including $3,918 and $3,263 of mortgage loans carried at fair value, respectively)	3,939		3,268
Loans	'		'
Commercial	78,878		70,033
Commercial real estate	40,909		39,885
Residential mortgages	51,957		51,156
Credit card	17,858		18,021
Other retail	48,935		47,678
Total loans, excluding covered loans	238,537		226,773
Covered loans	7,054		8,462
Total loans	245,591		235,235
Less allowance for loan losses	-4,065		-4,250
Net loans	241,526		230,985
Premises and equipment	2,608		2,606
Goodwill	9,401		9,205
Other intangible assets	3,338		3,529
Other assets (including $142 and $111 of trading securities at fair value pledged as collateral, respectively)	27,384	[1]	26,096	[1]
Total assets	391,284		364,021
Deposits	'		'
Noninterest-bearing	78,641		76,941
Interest-bearing	165,070		156,165
Time deposits greater than $100,000	29,386		29,017
Total deposits	273,097		262,123
Short-term borrowings	30,045		27,608
Long-term debt	30,768		20,049
Other liabilities	13,545		12,434
Total liabilities	347,455		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: 9/30/14 and 12/31/13 - 2,125,725,742 shares	21		21
Capital surplus	8,293		8,216
Retained earnings	41,543		38,667
Less cost of common stock in treasury: 9/30/14 - 330,882,734 shares; 12/31/13 - 300,977,274 shares	-10,836		-9,476
Accumulated other comprehensive income (loss)	-636		-1,071
Total U.S. Bancorp shareholders' equity	43,141		41,113
Noncontrolling interests	688		694
Total equity	43,829		41,807
Total liabilities and equity	$391,284		$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 $)	Sep. 30, 2014	Dec. 31, 2013
Held-to-maturity securities, fair value	$44,094,000,000	$38,368,000,000
Securities, pledged as collateral	640,000,000	2,100,000,000
Mortgage loans, carried at fair value	3,918,000,000	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)	330,882,734	300,977,274
Held-to-maturity Securities [Member]	'	'
Securities, pledged as collateral	366,000,000	994,000,000
Available-for-Sale Securities [Member]	'	'
Securities, pledged as collateral	274,000,000	1,106,000,000
Trading Securities [Member]	'	'
Securities, pledged as collateral	$142,000,000	$111,000,000

Consolidated_Statement_of_Inco

Consolidated Statement of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest Income	'	'	'	'
Loans	$2,518	$2,568	$7,572	$7,682
Loans held for sale	36	46	87	172
Investment securities	476	420	1,378	1,222
Other interest income	27	34	89	141
Total interest income	3,057	3,068	9,126	9,217
Interest Expense	'	'	'	'
Deposits	115	134	348	433
Short-term borrowings	72	98	204	270
Long-term debt	178	178	543	587
Total interest expense	365	410	1,095	1,290
Net interest income	2,692	2,658	8,031	7,927
Provision for credit losses	311	298	941	1,063
Net interest income after provision for credit losses	2,381	2,360	7,090	6,864
Noninterest Income	'	'	'	'
Credit and debit card revenue	251	244	749	702
Corporate payment products revenue	195	192	550	540
Merchant processing services	387	371	1,127	1,091
ATM processing services	81	83	241	248
Trust and investment management fees	315	280	930	842
Deposit service charges	185	180	513	493
Treasury management fees	136	134	409	408
Commercial products revenue	209	207	635	616
Mortgage banking revenue	260	328	774	1,125
Investment products fees	49	46	142	133
Securities gains (losses), net	'	'	'	'
Realized gains (losses), net	'	'	8	21
Total other-than-temporary impairment	-3	-2	-5	-5
Portion of other-than-temporary impairment recognized in other comprehensive income	'	-1	-1	-8
Total securities gains (losses), net	-3	-3	2	8
Other	177	115	722	412
Total noninterest income	2,242	2,177	6,794	6,618
Noninterest Expense	'	'	'	'
Compensation	1,132	1,088	3,372	3,268
Employee benefits	250	278	796	865
Net occupancy and equipment	249	240	739	709
Professional services	102	94	282	263
Marketing and business development	78	85	253	254
Technology and communications	219	214	644	639
Postage, printing and supplies	81	76	242	230
Other intangibles	51	55	148	167
Other	452	435	1,435	1,197
Total noninterest expense	2,614	2,565	7,911	7,592
Income before income taxes	2,009	1,972	5,973	5,890
Applicable income taxes	523	542	1,566	1,629
Net income	1,486	1,430	4,407	4,261
Net (income) loss attributable to noncontrolling interests	-15	38	-44	119
Net income attributable to U.S. Bancorp	1,471	1,468	4,363	4,380
Net income applicable to U.S. Bancorp common shareholders	$1,405	$1,400	$4,163	$4,163
Earnings per common share	$0.78	$0.76	$2.30	$2.26
Diluted earnings per common share	$0.78	$0.76	$2.29	$2.25
Dividends declared per common share	$0.25	$0.23	$0.72	$0.66
Average common shares outstanding	1,798	1,832	1,809	1,844
Average diluted common shares outstanding	1,807	1,843	1,819	1,854

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$1,486	$1,430	$4,407	$4,261
Other Comprehensive Income (Loss)	'	'	'	'
Changes in unrealized gains and losses on securities available-for-sale	-21	-237	486	-1,032
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	1	1	8
Changes in unrealized gains and losses on derivative hedges	16	-17	-19	33
Foreign currency translation	4	13	18	-20
Changes in unrealized gains and losses on retirement plans	'	38	'	37
Reclassification to earnings of realized gains and losses	76	99	221	270
Income taxes related to other comprehensive income	-29	40	-272	276
Total other comprehensive income (loss)	46	-63	435	-428
Comprehensive income	1,532	1,367	4,842	3,833
Comprehensive (income) loss attributable to noncontrolling interests	-15	38	-44	119
Comprehensive income attributable to U.S. Bancorp	$1,517	$1,405	$4,798	$3,952

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)	4,261	'	'	'	'	'	'	'	'
Net (income) loss attributable to noncontrolling interests	-119	'	'	'	'	'	'	'	-119
Net income attributable to U.S. Bancorp	4,380	'	'	'	4,380	'	'	4,380	'
Other comprehensive income (loss)	-428	'	'	'	'	'	-428	-428	'
Redemption of preferred stock	-500	'	-500	8	-8	'	'	-500	'
Preferred stock dividends	-189	'	'	'	-189	'	'	-189	'
Common stock dividends	-1,211	'	'	'	-1,211	'	'	-1,211	'
Issuance of preferred stock	487	'	487	'	'	'	'	487	'
Issuance of common and treasury stock	345	'	'	-114	'	459	'	345	'
Issuance of common and treasury stock, shares	'	15	'	'	'	'	'	'	'
Purchase of treasury stock	-1,843	'	'	'	'	-1,843	'	-1,843	'
Purchase of treasury stock, shares	'	-52	'	'	'	'	'	'	'
Distributions to noncontrolling interests	-45	'	'	'	'	'	'	'	-45
Net other changes in noncontrolling interests	315	'	'	'	'	'	'	'	315
Stock option and restricted stock grants	93	'	'	93	'	'	'	93	'
Ending Balance at Sep. 30, 2013	41,552	21	4,756	8,188	37,692	-9,174	-1,351	40,132	1,420
Shares, Ending Balance at Sep. 30, 2013	'	1,832	'	'	'	'	'	'	'
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)	4,407	'	'	'	'	'	'	'	'
Net (income) loss attributable to noncontrolling interests	44	'	'	'	'	'	'	'	44
Net income attributable to U.S. Bancorp	4,363	'	'	'	4,363	'	'	4,363	'
Other comprehensive income (loss)	435	'	'	'	'	'	435	435	'
Preferred stock dividends	-181	'	'	'	-181	'	'	-181	'
Common stock dividends	-1,306	'	'	'	-1,306	'	'	-1,306	'
Issuance of common and treasury stock	397	'	'	-10	'	407	'	397	'
Issuance of common and treasury stock, shares	'	13	'	'	'	'	'	'	'
Purchase of treasury stock	-1,767	'	'	'	'	-1,767	'	-1,767	'
Purchase of treasury stock, shares	'	-43	'	'	'	'	'	'	'
Distributions to noncontrolling interests	-44	'	'	'	'	'	'	'	-44
Net other changes in noncontrolling interests	-6	'	'	'	'	'	'	'	-6
Stock option and restricted stock grants	87	'	'	87	'	'	'	87	'
Ending Balance at Sep. 30, 2014	$43,829	$21	$4,756	$8,293	$41,543	($10,836)	($636)	$43,141	$688
Shares, Ending Balance at Sep. 30, 2014	'	1,795	'	'	'	'	'	'	'

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Operating Activities	'	'
Net income attributable to U.S. Bancorp	$4,363	$4,380
Adjustments to reconcile net income to net cash provided by operating activities	'	'
Provision for credit losses	941	1,063
Depreciation and amortization of premises and equipment	225	222
Amortization of intangibles	148	167
Provision for deferred income taxes	-36	-38
(Gain) loss on sale of loans held for sale	-565	-864
(Gain) loss on sale of securities and other assets	-383	-42
Loans originated for sale in the secondary market, net of repayments	-21,374	-49,411
Proceeds from sales of loans held for sale	21,160	53,845
Other, net	-13	-665
Net cash provided by operating activities	4,466	8,657
Investing Activities	'	'
Proceeds from sales of available-for-sale investment securities	401	766
Proceeds from maturities of held-to-maturity investment securities	7,215	6,854
Proceeds from maturities of available-for-sale investment securities	4,944	8,395
Purchases of held-to-maturity investment securities	-12,571	-9,439
Purchases of available-for-sale investment securities	-16,627	-9,381
Net increase in loans outstanding	-10,043	-8,495
Proceeds from sales of loans	1,165	620
Purchases of loans	-1,703	-1,883
Acquisitions, net of cash acquired	3,436	'
Other, net	411	-100
Net cash used in investing activities	-23,372	-12,663
Financing Activities	'	'
Net increase in deposits	6,186	12,533
Net increase (decrease) in short-term borrowings	2,437	-174
Proceeds from issuance of long-term debt	12,978	198
Principal payments or redemption of long-term debt	-2,196	-2,380
Proceeds from issuance of preferred stock	'	487
Proceeds from issuance of common stock	377	331
Redemption of preferred stock	'	-500
Repurchase of common stock	-1,704	-1,779
Cash dividends paid on preferred stock	-181	-193
Cash dividends paid on common stock	-1,285	-1,154
Net cash provided by financing activities	16,612	7,369
Change in cash and due from banks	-2,294	3,363
Cash and due from banks at beginning of period	8,477	8,252
Cash and due from banks at end of period	$6,183	$11,615

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Basis of Presentation [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.

Accounting_Changes

Accounting Changes	9 Months Ended
	Sep. 30, 2014
Accounting Changes [Abstract]	'
Accounting Changes	'
	Note 2	Accounting Changes
	Revenue Recognition In May 2014, the Financial Accounting Standards Board issued accounting guidance, effective for the Company on January 1, 2017, related to revenue recognition from contracts with customers, which amends certain currently existing revenue recognition accounting guidance. The guidance allows for either retrospective application to all periods presented or a modified retrospective approach where the guidance would only be applied to existing contracts in effect at the adoption date and new contracts going forward. The Company is currently evaluating the impact of this guidance under the modified retrospective approach and expects the adoption will not be material to its financial statements.

Business_Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Business Combinations	'
	Note 3	Business Combinations
	In June 2014, the Company acquired the Chicago-area branch banking operations of the Charter One Bank franchise (“Charter One”) owned by RBS Citizens Financial Group. The acquisition included Charter One’s retail branch network, small business operations and select middle market relationships. The Company acquired approximately $969 million of loans and $4.8 billion of deposits with this transaction.

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	Note 4	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:
			September 30, 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		$	2,679		$	8		$	–		$	(40	)	$	2,647			$	3,114	$	5	$	–		$	(79	)	$	3,040
	Mortgage-backed securities
	Residential
	Agency			41,419			244			–			(358	)		41,305				35,671		187		–			(665	)		35,193
	Non-agency non-prime (d)			1			–			–			–			1				1		–		–			–			1
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			8			–			–			8				–		9		–			–			9
	Other			14			4			(1	)		–			17				16		4		(1	)		(1	)		18
	Obligations of state and political subdivisions			10			–			–			–			10				12		–		–			–			12
	Obligations of foreign governments			9			–			–			–			9				7		–		–			–			7
	Other debt securities			99			–			–			(2	)		97				99		–		–			(11	)		88
	Total held-to-maturity		$	44,231		$	264		$	(1	)	$	(400	)	$	44,094			$	38,920	$	205	$	(1	)	$	(756	)	$	38,368
	Available-for-sale (b)
	U.S. Treasury and agencies		$	2,692		$	7		$	–		$	(21	)	$	2,678			$	1,108	$	4	$	–		$	(67	)	$	1,045
	Mortgage-backed securities
	Residential
	Agency			41,734			524			–			(421	)		41,837				31,633		449		–			(529	)		31,553
	Non-agency
	Prime (c)			420			11			(4	)		(1	)		426				486		4		(8	)		(4	)		478
	Non-prime (d)			270			15			(1	)		–			284				297		5		(5	)		–			297
	Commercial agency			119			3			–			–			122				148		4		–			–			152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			19			4			–			–			23				20		4		–			–			24
	Other			609			13			–			–			622				616		13		–			–			629
	Obligations of state and political subdivisions			5,327			239			–			(3	)		5,563				5,673		116		–			(51	)		5,738
	Obligations of foreign governments			6			–			–			–			6				6		–		–			–			6
	Corporate debt securities			690			3			–			(54	)		639				734		–		–			(94	)		640
	Perpetual preferred securities			201			27			–			(8	)		220				205		24		–			(17	)		212
	Other investments			227			27			–			–			254				133		28		–			–			161
	Total available-for-sale		$	52,314		$	873		$	(5	)	$	(508	)	$	52,674			$	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 4.9 years at September 30, 2014, compared with 6.0 years at December 31, 2013. The corresponding weighted-average yields were 2.35 percent and 2.64 percent, respectively. The weighted-average maturity of the held-to-maturity investment securities was 4.4 years at September 30, 2014, compared with 4.5 years at December 31, 2013. The corresponding weighted-average yields were 1.93 percent and 2.00 percent, respectively.
	For amortized cost, fair value and yield by maturity date of held-to-maturity and available-for-sale investment securities outstanding at September 30, 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 $12.9 billion at September 30, 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 $640 million at September 30, 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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Taxable		$	419		$	357		$	1,203		$	1,029
	Non-taxable			57			63			175			193
	Total interest income from investment securities		$	476		$	420		$	1,378		$	1,222
	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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Realized gains		$	–		$	–		$	8		$	21
	Realized losses			–			–			–			–
	Net realized gains (losses)		$	–		$	–		$	8		$	21
	Income tax (benefit) on net realized gains (losses)		$	–		$	–		$	3		$	8
	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 tables summarize other-than-temporary impairment by investment category:
		2014									2013
Three Months Ended September 30		Losses			Other Gains			Total			Losses			Other Gains		Total
(Dollars in Millions)		Recorded			(Losses) (c)						Recorded in			(Losses) (c)
		in Earnings									Earnings
Available-for-sale
Mortgage-backed securities
Non-agency residential
Prime (a)		$	–		$	–		$	–		$	(1	)	$	–	$	(1	)
Non-prime (b)			–			–			–			(2	)		1		(1	)
Perpetual preferred securities			(3	)		–			(3	)		–			–		–
Total available-for-sale		$	(3	)	$	–		$	(3	)	$	(3	)	$	1	$	(2	)
(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.
		2014									2013
Nine Months Ended September 30		Losses			Other Gains			Total			Losses			Other Gains		Total
(Dollars in Millions)		Recorded			(Losses) (c)						Recorded in			(Losses) (c)
		in Earnings									Earnings
Available-for-sale
Mortgage-backed securities
Prime (a)		$	(1	)	$	1		$	–		$	(5	)	$	2	$	(3	)
Non-prime (b)			(2	)		–			(2	)		(8	)		6		(2	)
Perpetual preferred securities			(3	)		–			(3	)		–			–		–
Total available-for-sale		$	(6	)	$	1		$	(5	)	$	(13	)	$	8	$	(5	)
(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. For perpetual preferred securities determined to be other-than-temporarily impaired, the Company recorded a loss in earnings for the entire difference between the securities’ fair value and their amortized cost.
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 September 30, 2014:
		Non-Prime (a)
		Minimum			Maximum			Average
Estimated lifetime prepayment rates			8	%		10	%		8	%
Lifetime probability of default rates			6			8			8
Lifetime loss severity rates			40			55			42
(a)	Includes all securities not meeting the conditions to be designated as prime.
Changes in the credit losses on debt securities (excluding perpetual preferred securities) are summarized as follows:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
(Dollars in Millions)		2014			2013			2014			2013
Balance at beginning of period		$	111		$	124		$	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			–			3			3			13
Total other-than-temporary impairment on debt securities			–			3			3			13
Other Changes in Credit Losses
Increases in expected cash flows			(2	)		(1	)		(4	)		(2	)
Realized losses (a)			(4	)		(4	)		(10	)		(18	)
Credit losses on security sales and securities expected to be sold			–			–			–			(5	)
Balance at end of period		$	105		$	122		$	105		$	122
(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 September 30, 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 September 30, 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		$	577		$	(2	)	$	968		$	(38	)	$	1,545	$	(40	)
Residential agency mortgage-backed securities			11,469			(76	)		9,607			(282	)		21,076		(358	)
Other asset-backed securities			–			–			6			(1	)		6		(1	)
Other debt securities			–			–			22			(2	)		22		(2	)
Total held-to-maturity		$	12,046		$	(78	)	$	10,603		$	(323	)	$	22,649	$	(401	)
Available-for-sale
U.S. Treasury and agencies		$	1,173		$	(1	)	$	825		$	(20	)	$	1,998	$	(21	)
Mortgage-backed securities
Residential
Agency			9,519			(91	)		8,317			(330	)		17,836		(421	)
Non-agency (a)
Prime (b)			40			(1	)		114			(4	)		154		(5	)
Non-prime (c)			12			–			22			(1	)		34		(1	)
Other asset-backed securities			2			–			24			–			26		–
Obligations of state and political subdivisions			15			–			217			(3	)		232		(3	)
Obligations of foreign governments			6			–			–			–			6		–
Corporate debt securities			–			–			453			(54	)		453		(54	)
Perpetual preferred securities			45			–			76			(8	)		121		(8	)
Total available-for-sale		$	10,812		$	(93	)	$	10,048		$	(420	)	$	20,860	$	(513	)
(a)	The Company has $6 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 September 30, 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	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Loans and Allowance for Credit Losses	'
	Note 5	Loans and Allowance for Credit Losses
	The composition of the loan portfolio, disaggregated by class and underlying specific portfolio type, was as follows:
			September 30, 2014								December 31, 2013
	(Dollars in Millions)		Amount			Percent					Amount				Percent
						of Total									of Total
	Commercial
	Commercial		$	73,600			30	%			$	64,762				27.5	%
	Lease financing			5,278			2.1					5,271				2.3
	Total commercial			78,878			32.1					70,033				29.8
	Commercial Real Estate
	Commercial mortgages			31,802			13					32,183				13.7
	Construction and development			9,107			3.7					7,702				3.3
	Total commercial real estate			40,909			16.7					39,885				17
	Residential Mortgages
	Residential mortgages			38,858			15.8					37,545				15.9
	Home equity loans, first liens			13,099			5.3					13,611				5.8
	Total residential mortgages			51,957			21.1					51,156				21.7
	Credit Card			17,858			7.3					18,021				7.7
	Other Retail
	Retail leasing			5,999			2.5					5,929				2.5
	Home equity and second mortgages			15,769			6.4					15,442				6.6
	Revolving credit			3,242			1.3					3,276				1.4
	Installment			6,173			2.5					5,709				2.4
	Automobile			14,517			5.9					13,743				5.8
	Student			3,235			1.3					3,579				1.5
	Total other retail			48,935			19.9					47,678				20.2
	Total loans, excluding covered loans			238,537			97.1					226,773				96.4
	Covered Loans			7,054			2.9					8,462				3.6
	Total loans		$	245,591			100	%			$	235,235				100	%
	The Company had loans of $79.4 billion at September 30, 2014, and $77.2 billion at December 31, 2013, pledged at the Federal Home Loan Bank (“FHLB”), and loans of $61.8 billion at September 30, 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 $575 million at September 30, 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.”
	On the acquisition date, the estimate of the contractually required payments receivable for all purchased nonimpaired loans acquired in the second quarter 2014 acquisition of Charter One were $1.5 billion. The contractual cash flows not expected to be collected on these loans of $247 million and the estimated fair value of the loans of $969 million were determined based upon the estimated remaining life of the underlying loans, which includes the effects of estimated prepayments. The contractual cash flows not expected to be collected primarily reflect a reduction in contractual interest payments resulting from these estimated prepayments. There were no purchased impaired loans acquired in the Charter One acquisition.
	Changes in the accretable balance for purchased impaired loans were as follows:
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
	(Dollars in Millions)		2014			2013					2014				2013
	Balance at beginning of period		$	1,487		$	1,802				$	1,655			$	1,709
	Accretion			(105	)		(119	)				(336	)			(380	)
	Disposals			(34	)		(51	)				(103	)			(120	)
	Reclassifications from nonaccretable difference (a)			38			119					172				177
	Other (b)			–			–					(2	)			365
	Balance at end of period		$	1,386		$	1,751				$	1,386			$	1,751
	(a)	Primarily relates to changes in expected credit performance.
	(b)	The amount for the nine months ended September 30, 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 56 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 reflects 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, historical loss experience is also incorporated 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:
	Three Months Ended September 30		Commercial			Commercial			Residential				Credit				Other				Total Loans,				Covered				Total
	(Dollars in Millions)					Real Estate			Mortgages				Card				Retail				Excluding				Loans				Loans
																					Covered Loans
	2014
	Balance at beginning of period		$	1,111		$	725		$	848			$	874			$	779			$	4,337			$	112			$	4,449
	Add
	Provision for credit losses			83			(6	)		(13	)			162				84				310				1				311
	Deduct
	Loans charged off			80			10			48				174				96				408				2				410
	Less recoveries of loans charged off			(22	)		(6	)		(6	)			(16	)			(23	)			(73	)			(1	)			(74	)
	Net loans charged off			58			4			42				158				73				335				1				336
Other changes (a)			–			–			–				–				–				–				(10	)			(10	)
Balance at end of period		$	1,136		$	715		$	793			$	878			$	790			$	4,312			$	102			$	4,414
2013
Balance at beginning of period		$	1,023		$	777		$	921			$	874			$	838			$	4,433			$	179			$	4,612
Add
Provision for credit losses			19			(22	)		70				151				84				302				(4	)			298
Deduct
Loans charged off			65			17			62				175				122				441				9				450
Less recoveries of loans charged off			(54	)		(23	)		(5	)			(15	)			(24	)			(121	)			(1	)			(122	)
Net loans charged off			11			(6	)		57				160				98				320				8				328
Other changes (a)			–			–			–				–				–				–				(4	)			(4	)
Balance at end of period		$	1,031		$	761		$	934			$	865			$	824			$	4,415			$	163			$	4,578
(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, and the impact of any loan sales.
Nine Months Ended September 30		Commercial			Commercial			Residential				Credit				Other				Total Loans,				Covered				Total
(Dollars in Millions)					Real Estate			Mortgages				Card				Retail				Excluding				Loans				Loans
																				Covered Loans
2014
Balance at beginnng of period		$	1,075		$	776		$	875			$	884			$	781			$	4,391			$	146			$	4,537
Add
Provision for credit losses			210			(64	)		74				495				227				942				(1	)			941
Deduct
Loans charged off			219			27			171				546				291				1,254				10				1,264
Less recoveries of loans charged off			(70	)		(30	)		(15	)			(48	)			(73	)			(236	)			(2	)			(238	)
Net loans charged off			149			(3	)		156				498				218				1,018				8				1,026
Other changes (a)			–			–			–				(3	)			–				(3	)			(35	)			(38	)
Balance at end of period		$	1,136		$	715		$	793			$	878			$	790			$	4,312			$	102			$	4,414
2013
Balance at beginnng of period		$	1,051		$	857		$	935			$	863			$	848			$	4,554			$	179			$	4,733
Add
Provision for credit losses			64			(100	)		222				495				305				986				77				1,063
Deduct
Loans charged off			184			76			243				559				412				1,474				31				1,505
Less recoveries of loans charged off			(100	)		(80	)		(20	)			(66	)			(83	)			(349	)			(3	)			(352	)
Net loans charged off			84			(4	)		223				493				329				1,125				28				1,153
Other changes (a)			–			–			–				–				–				–				(65	)			(65	)
Balance at end of period		$	1,031		$	761		$	934			$	865			$	824			$	4,415			$	163			$	4,578
(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, and the impact of any loan sales.
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 September 30, 2014 Related to
Loans individually evaluated for impairment (a)		$	10		$	6		$	–			$	–			$	–			$	16			$	–			$	16
TDRs collectively evaluated for impairment			13			15			308				64				44				444				3				447
Other loans collectively evaluated for impairment			1,113			662			485				814				746				3,820				2				3,822
Loans acquired with deteriorated credit quality			–			32			–				–				–				32				97				129
Total allowance for credit losses		$	1,136		$	715		$	793			$	878			$	790			$	4,312			$	102			$	4,414
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
September 30, 2014
Loans individually evaluated for impairment (a)		$	237		$	158		$	–			$	–			$	–			$	395			$	52			$	447
TDRs collectively evaluated for impairment			129			273			4,916				256				248				5,822				74				5,896
Other loans collectively evaluated for impairment			78,511			40,368			47,041				17,602				48,687				232,209				3,615				235,824
Loans acquired with deteriorated credit quality			1			110			–				–				–				111				3,313				3,424
Total loans		$	78,878		$	40,909		$	51,957			$	17,858			$	48,935			$	238,537			$	7,054			$	245,591
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 when 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
September 30, 2014
Commercial		$	78,453		$	215		$	37			$	173			$	78,878
Commercial real estate			40,606			50			12				241				40,909
Residential mortgages (a)			50,662			243			211				841				51,957
Credit card			17,403			219			196				40				17,858
Other retail			48,453			222			76				184				48,935
Total loans, excluding covered loans			235,577			949			532				1,479				238,537
Covered loans			6,434			102			430				88				7,054
Total loans		$	242,011		$	1,051		$	962			$	1,567			$	245,591
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 September 30, 2014, $422 million of loans 30–89 days past due and $3.1 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 September 30, 2014, the amount of foreclosed residential real estate held by the Company, and included in other real estate owned, was $273 million ($236 million excluding covered assets). This excludes $623 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 September 30, 2014, was $3.0 billion, of which $2.1 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
September 30, 2014
Commercial		$	76,688		$	1,396		$	794			$	2,190			$	78,878
Commercial real estate			39,591			474			844				1,318				40,909
Residential mortgages (b)			50,817			8			1,132				1,140				51,957
Credit card			17,622			–			236				236				17,858
Other retail			48,569			18			348				366				48,935
Total loans, excluding covered loans			233,287			1,896			3,354				5,250				238,537
Covered loans			6,852			3			199				202				7,054
Total loans		$	240,139		$	1,899		$	3,553			$	5,452			$	245,591
Total outstanding commitments		$	494,015		$	2,990		$	4,201			$	7,191			$	501,206
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 September 30, 2014, $3.1 billion of GNMA loans 90 days or more past due and $2.5 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
September 30, 2014
Commercial		$	408		$	848		$	27			$	135
Commercial real estate			525			1,037			30				14
Residential mortgages			2,740			3,678			261				–
Credit card			256			256			64				–
Other retail			368			413			47				4
Total impaired loans, excluding GNMA and covered loans			4,297			6,232			429				153
Loans purchased from GNMA mortgage pools			2,478			2,478			51				–
Covered loans			295			607			20				1
Total		$	7,070		$	9,317		$	500			$	154
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 September 30, 2014 and December 31, 2013, had an associated allowance for credit losses.
Additional information on impaired loans follows:
		2014								2013
(Dollars in Millions)		Average			Interest					Average				Interest
		Recorded			Income					Recorded				Income
		Investment			Recognized					Investment				Recognized
Three Months Ended September 30
Commercial		$	425		$	4				$	380			$	5
Commercial real estate			541			4					819				6
Residential mortgages			2,740			33					2,765				32
Credit card			264			1					347				3
Other retail			373			5					417				7
Total impaired loans, excluding GNMA and covered loans			4,343			47					4,728				53
Loans purchased from GNMA mortgage pools			2,647			29					1,883				22
Covered loans			335			5					519				6
Total		$	7,325		$	81				$	7,130			$	81
Nine Months Ended September 30
Commercial		$	430		$	8				$	384			$	24
Commercial real estate			598			17					950				27
Residential mortgages			2,744			105					2,744				99
Credit card			281			7					380				12
Other retail			381			13					431				19
Total impaired loans, excluding GNMA and covered loans			4,434			150					4,889				181
Loans purchased from GNMA mortgage pools			2,691			95					1,869				68
Covered loans			389			15					588				21
Total		$	7,514		$	260				$	7,346			$	270
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
(Dollars in Millions)		Number			Pre-Modification			Post-Modification						Number				Pre-Modification				Post-Modification
		of Loans			Outstanding			Outstanding						of Loans				Outstanding				Outstanding
					Loan Balance			Loan Balance										Loan Balance				Loan Balance
Three Months Ended September 30
Commercial			448		$	28		$	26						551			$	62			$	60
Commercial real estate			27			14			13						48				76				73
Residential mortgages			525			71			70						338				42				42
Credit card			6,708			35			36						6,447				39				38
Other retail			810			18			18						847				21				21
Total loans, excluding GNMA and covered loans			8,518			166			163						8,231				240				234
Loans purchased from GNMA mortgage pools			2,273			278			278						2,315				300				284
Covered loans			18			3			3						38				19				11
Total loans			10,809		$	447		$	444						10,584			$	559			$	529
Nine Months Ended September 30
Commercial			1,633		$	181		$	169						1,962			$	150			$	140
Commercial real estate			54			33			28						147				193				186
Residential mortgages			1,732			232			231						1,575				214				210
Credit card			20,040			111			112						20,147				122				122
Other retail			2,246			52			52						3,519				86				85
Total loans, excluding GNMA and covered loans			25,705			609			592						27,350				765				743
Loans purchased from GNMA mortgage pools			7,198			816			803						6,450				822				782
Covered loans			38			14			13						109				85				64
Total loans			32,941		$	1,439		$	1,408						33,909			$	1,672			$	1,589
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 third quarter of 2014, at September 30, 2014, 310 residential mortgages, 49 home equity and second mortgage loans and 1,764 loans purchased from GNMA mortgage pools with outstanding balances of $40 million, $3 million and $231million, respectively, were in a trial period and have estimated post-modification balances of $41 million, $3 million and $232 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 distinct restructuring 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.
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 accounting and disclosure purposes 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
(Dollars in Millions)		Number			Amount					Number				Amount
		of Loans			Defaulted					of Loans				Defaulted
Three Months Ended September 30
Commercial			161		$	34					143			$	37
Commercial real estate			4			–					30				18
Residential mortgages			147			22					303				41
Credit card			1,665			9					1,485				8
Other retail			146			5					278				10
Total loans, excluding GNMA and covered loans			2,123			70					2,239				114
Loans purchased from GNMA mortgage pools			366			41					492				69
Covered loans			4			1					24				25
Total loans			2,493		$	112					2,755			$	208
Nine Months Ended September 30
Commercial			456		$	42					483			$	42
Commercial real estate			16			10					72				90
Residential mortgages			424			61					673				100
Credit card			4,586			25					5,109				29
Other retail			489			15					1,164				53
Total loans, excluding GNMA and covered loans			5,971			153					7,501				314
Loans purchased from GNMA mortgage pools			542			63					4,795				615
Covered loans			14			5					49				37
Total loans			6,527		$	221					12,345			$	966
In addition to the defaults in the table above, for the three and nine months ended September 30, 2014, the Company had a total of 435 and 1,313 residential mortgage loans, home equity and second mortgage loans and loans purchased from GNMA mortgage pools with aggregate outstanding balances of $57 million and $159 million, respectively, 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. Effective December 31, 2014, the loss sharing coverage provided by the FDIC expires on all covered assets, except for single family residential mortgages that remain covered under loss sharing agreements with remaining terms up to five years. The carrying amount of the covered assets consisted of purchased impaired loans, purchased nonimpaired loans and other assets as shown in the following table:
		September 30, 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		$	–		$	21		$	–			$	21					$	–			$	32			$	–			$	32
Commercial real estate loans			464			1,093			–				1,557						738				1,494				–				2,232
Residential mortgage loans			2,849			774			–				3,623						3,037				890				–				3,927
Credit card loans			–			4			–				4						–				5				–				5
Other retail loans			–			605			–				605						–				666				–				666
Losses reimbursable by the FDIC (a)			–			–			737				737						–				–				798				798
Unamortized changes in FDIC asset (b)			–			–			507				507						–				–				802				802
Covered loans			3,313			2,497			1,244				7,054						3,775				3,087				1,600				8,462
Foreclosed real estate			–			–			72				72						–				–				97				97
Total covered assets		$	3,313		$	2,497		$	1,316			$	7,126					$	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 September 30, 2014 and December 31, 2013, $5 million of the purchased impaired loans included in covered loans were classified as nonperforming assets, 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	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	'
	Note 6	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 16.
	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 7. 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 $189 million and $187 million for the three months ended September 30, 2014 and 2013, respectively, and $546 million and $527 million for the nine months ended September 30, 2014 and 2013, respectively. The Company also recognized $262 million and $254 million of investment tax credits for the three months ended September 30, 2014 and 2013, respectively, and $582 million and $454 million for the nine months ended September 30, 2014 and 2013, respectively. The Company recognized $187 million and $247 million of expenses related to all of these investments for the three months ended September 30, 2014 and 2013, respectively, of which $60 million and $87 million, respectively, was included in tax expense and the remainder was included in noninterest expense. The Company recognized $517 million and $686 million of expenses related to all of these investments for the nine months ended September 30, 2014 and 2013, respectively, of which $190 million and $267 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)		September 30, 2014		December 31, 2013
	Investment carrying amount		$	4,385	$	4,178
	Unfunded capital and other commitments			1,850		1,661
	Maximum exposure to loss			8,038		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 $54 million at September 30, 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 September 30, 2014, approximately $2.6 billion of the Company’s assets and $2.0 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 September 30, 2014, $114 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 September 30, 2014, $4.1 billion of available-for-sale securities and $3.9 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 $97 million at September 30, 2014, compared with $98 million at December 31, 2013. The maximum exposure to loss related to these VIEs was $106 million at September 30, 2014 and $107 million at December 31, 2013, representing the Company’s investment balance and its unfunded commitments to invest additional amounts.

Mortgage_Servicing_Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2014
Text Block [Abstract]	'
Mortgage Servicing Rights	'
	Note 7	Mortgage Servicing Rights
	The Company serviced $224.6 billion of residential mortgage loans for others at September 30, 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 $49 million and $108 million for the three months ended September 30, 2014 and 2013, respectively, and net gains of $200 million (of which $44 million related to excess servicing rights sold during the second quarter of 2014) and $163 million for the nine months ended September 30, 2014 and 2013, respectively. Loan servicing fees, not including valuation changes, included in mortgage banking revenue, were $178 million and $192 million for the three months ended September 30, 2014 and 2013, respectively, and $551 million and $566 million for the nine months ended September 30, 2014 and 2013, respectively.
	Changes in fair value of capitalized MSRs are summarized as follows:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Balance at beginning of period		$	2,412		$	2,377		$	2,680		$	1,700
	Rights purchased			1			2			3			7
	Rights capitalized			109			187			264			674
	Rights sold			–			–			(141	)		–
	Changes in fair value of MSRs
	Due to fluctuations in market interest rates (a)			29			71			(129	)		503
	Due to revised assumptions or models (b)			15			42			71			33
	Other changes in fair value (c)			(105	)		(102	)		(287	)		(340	)
	Balance at end of period		$	2,461		$	2,577		$	2,461		$	2,577
	(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:
			September 30, 2014																		December 31, 2013
				Down			Down			Down			Up			Up			Up			Down			Down			Down			Up			Up			Up
	(Dollars in Millions)		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		$	(490	)	$	(212	)	$	(99	)	$	84		$	157		$	297		$	(435	)	$	(199	)	$	(93	)	$	82		$	154		$	287
	Derivative instrument hedges			391			196			94			(87	)		(167	)		(319	)		399			194			91			(82	)		(157	)		(301	)
	Net sensitivity		$	(99	)	$	(16	)	$	(5	)	$	(3	)	$	(10	)	$	(22	)	$	(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:
			September 30, 2014												December 31, 2013
	(Dollars in Millions)		MRBP			Government			Conventional (b)			Total			MRBP			Government			Conventional (b)			Total
	Servicing portfolio		$	18,052		$	40,600		$	163,757		$	222,409		$	15,896		$	41,659		$	169,287		$	226,842
	Fair value		$	199		$	469		$	1,793		$	2,461		$	180		$	500		$	2,000		$	2,680
	Value (bps) (a)			110			116			109			111			113			120			118			118
	Weighted-average servicing fees (bps)			37			33			27			29			39			32			29			30
	Multiple (value/servicing fees)			2.97			3.52			4.04			3.83			2.9			3.75			4.07			3.93
	Weighted-average note rate			4.62	%		4.2	%		4.15	%		4.2	%		4.7	%		4.24	%		4.17	%		4.22	%
	Weighted-average age (in years)			3.7			3.1			3			3.1			3.8			2.6			2.5			2.6
	Weighted-average expected prepayment (constant prepayment rate)			12.9	%		12.4	%		10.6	%		11.1	%		13.5	%		11.5	%		10.9	%		11.2	%
	Weighted-average expected life (in years)			6.2			6.4			7			6.8			6.2			6.9			7.2			7.1
	Weighted-average discount rate			11.9	%		11.2	%		9.6	%		10.1	%		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	9 Months Ended
	Sep. 30, 2014
Equity [Abstract]	'
Preferred Stock	'
	Note 8	Preferred Stock
	At September 30, 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 were as follows:
			September 30, 2014								December 31, 2013
				Shares								Shares
				Issued and		Liquidation				Carrying		Issued and		Liquidation				Carrying
	(Dollars in Millions)		Outstanding		Preference		Discount		Amount		Outstanding		Preference		Discount		Amount
	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 September 30, 2014 and December 31, 2013, was $1.00 per share.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	Note 9	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 is as follows:
	Three Months Ended September 30		Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign Currency			Total
	(Dollars in Millions)		(Losses) on			(Losses) on			(Losses) on			(Losses) on			Translation
			Securities			Securities			Derivative			Retirement Plans
			Available-For-			Transferred From			Hedges
			Sale			Available-For-Sale
						to Held-To-
						Maturity
	2014
	Balance at beginning of period		$	233		$	60		$	(225	)	$	(699	)	$	(51	)	$	(682	)
	Changes in unrealized gains and losses			(21	)		–			16			–			–			(5	)
	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			3			(7	)		45			35			–			76
	Applicable income taxes			7			3			(23	)		(14	)		(2	)		(29	)
	Balance at end of period		$	222		$	56		$	(187	)	$	(678	)	$	(49	)	$	(636	)
	2013
	Balance at beginning of period		$	185		$	84		$	(313	)	$	(1,184	)	$	(60	)	$	(1,288	)
	Changes in unrealized gains and losses			(237	)		–			(17	)	$	38			–			(216	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			1			–			–			–			–			1
	Foreign currency translation adjustment			–			–			–			–			13			13
	Reclassification to earnings of realized gains and losses			3			(13	)		47			62			–			99
	Applicable income taxes			89			5			(11	)		(38	)		(5	)		40
	Balance at end of period		$	41		$	76		$	(294	)	$	(1,122	)	$	(52	)	$	(1,351	)
	Nine Months Ended September 30		Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign Currency			Total
	(Dollars in Millions)		(Losses) on			(Losses) on			(Losses) on			(Losses) on			Translation
			Securities			Securities			Derivative			Retirement Plans
			Available-For-			Transferred From			Hedges
			Sale			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			486			–			(19	)		–			–			467
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			1			–			–			–			–			1
	Foreign currency translation adjustment			–			–			–			–			18			18
	Reclassification to earnings of realized gains and losses			(2	)		(23	)		139			107			–			221
	Applicable income taxes			(186	)		9			(46	)		(42	)		(7	)		(272	)
	Balance at end of period		$	222		$	56		$	(187	)	$	(678	)	$	(49	)	$	(636	)
	2013
	Balance at beginning of period		$	679		$	107		$	(404	)	$	(1,265	)	$	(40	)	$	(923	)
	Changes in unrealized gains and losses			(1,032	)		–			33			37			–			(962	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			8			–			–			–			–			8
	Foreign currency translation adjustment			–			–			–			–			(20	)		(20	)
	Reclassification to earnings of realized gains and losses			(8	)		(50	)		142			186			–			270
	Applicable income taxes			394			19			(65	)		(80	)		8			276
	Balance at end of period		$	41		$	76		$	(294	)	$	(1,122	)	$	(52	)	$	(1,351	)
	Additional detail about the impact to net income for items reclassified out of accumulated other comprehensive income (loss) and into earnings, is as follows:
			Impact to Net Income
			Three Months Ended September 30,						Nine Months Ended September 30,						Affected Line Item in the
	(Dollars in Millions)		2014			2013			2014			2013			Consolidated Statement of Income
	Unrealized gains (losses) on securities available-for-sale
	Realized gains (losses) on sale of securities		$	–		$	–		$	8		$	21		Total securities gains (losses), net
	Other-than-temporary impairment recognized in earnings			(3	)		(3	)		(6	)		(13	)
				(3	)		(3	)		2			8		Total before tax
				1			1			(1	)		(3	)	Applicable income taxes
				(2	)		(2	)		1			5		Net-of-tax
	Unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity
	Amortization of unrealized gains			7			13			23			50		Interest income
				(3	)		(5	)		(9	)		(19	)	Applicable income taxes
				4			8			14			31		Net-of-tax
	Unrealized gains (losses) on derivative hedges
Realized gains (losses) on derivative hedges			(45	)		(47	)		(139	)		(142	)	Net interest income
			17			18			53			55		Applicable income taxes
			(28	)		(29	)		(86	)		(87	)	Net-of-tax
Unrealized gains (losses) on retirement plans
Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization			(35	)		(62	)		(107	)		(186	)	Employee benefits expense
			14			24			42			72		Applicable income taxes
			(21	)		(38	)		(65	)		(114	)	Net-of-tax
Total impact to net income		$	(47	)	$	(61	)	$	(136	)	$	(165	)

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Note 10	Earnings Per Share
	The components of earnings per share were:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	(Dollars and Shares in Millions, Except Per Share Data)		2014			2013			2014			2013
	Net income attributable to U.S. Bancorp		$	1,471		$	1,468		$	4,363		$	4,380
	Preferred dividends			(60	)		(61	)		(181	)		(189	)
	Impact of preferred stock redemption (a)			–			–			–			(8	)
	Earnings allocated to participating stock awards			(6	)		(7	)		(19	)		(20	)
	Net income applicable to U.S. Bancorp common shareholders		$	1,405		$	1,400		$	4,163		$	4,163
	Average common shares outstanding			1,798			1,832			1,809			1,844
	Net effect of the exercise and assumed purchase of stock awards			9			11			10			10
	Average diluted common shares outstanding			1,807			1,843			1,819			1,854
	Earnings per common share		$	0.78		$	0.76		$	2.3		$	2.26
	Diluted earnings per common share		$	0.78		$	0.76		$	2.29		$	2.25
	(a)	Represents stock issuance costs originally recorded in capital surplus upon the issuance of the Company’s Series D Non-Cumulative Perpetual Preferred Stock that were reclassified to retained earnings on the redemption date.
	Options outstanding at September 30, 2013, to purchase 9 million common shares were not included in the computation of diluted earnings per share for the nine months ended September 30, 2013, because they were antidilutive.

Employee_Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefits	'
	Note 11	Employee Benefits
	The components of net periodic benefit cost for the Company’s retirement plans were:
			Three Months Ended September 30,												Nine Months Ended September 30,
									Postretirement												Postretirement
			Pension Plans						Welfare Plan						Pension Plans						Welfare Plan
	(Dollars in Millions)		2014			2013			2014			2013			2014			2013			2014			2013
	Service cost		$	38		$	42		$	–		$	1		$	114		$	126		$	–		$	3
	Interest cost			50			43			1			1			148			128			3			3
	Expected return on plan assets			(51	)		(44	)		(1	)		–			(155	)		(132	)		(1	)		(1	)
	Prior service cost (credit) and transition obligation (asset) amortization			(2	)		(1	)		(1	)		–			(4	)		(4	)		(3	)		–
	Actuarial loss (gain) amortization			39			66			(1	)		(3	)		118			198			(4	)		(8	)
	Net periodic benefit cost		$	74		$	106		$	(2	)	$	(1	)	$	221		$	316		$	(5	)	$	(3	)

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 12	Income Taxes
	The components of income tax expense were:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Federal
	Current		$	423		$	390		$	1,334		$	1,506
	Deferred			10			57			(19	)		(35	)
	Federal income tax			433			447			1,315			1,471
	State
	Current			101			84			268			161
	Deferred			(11	)		11			(17	)		(3	)
	State income tax			90			95			251			158
	Total income tax provision		$	523		$	542		$	1,566		$	1,629
	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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Tax at statutory rate		$	704		$	690		$	2,091		$	2,061
	State income tax, at statutory rates, net of federal tax benefit			62			62			163			102
	Tax effect of
	Tax credits and benefits, net of related expenses			(186	)		(176	)		(535	)		(394	)
	Tax-exempt income			(51	)		(52	)		(154	)		(159	)
	Noncontrolling interests			(5	)		13			(15	)		42
	Other items			(1	)		5			16			(23	)
	Applicable income taxes		$	523		$	542		$	1,566		$	1,629
	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 September 30, 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 $1.8 billion at September 30, 2014, and $1.3 billion at December 31, 2013.

Derivative_Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	Note 13	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 nine months ended September 30, 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 September 30, 2014, the Company had $187 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 $31 million (net-of-tax) and $121 million (net-of-tax), respectively. These amounts include 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 nine months ended September 30, 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 nine months ended September 30, 2014. There were no non-derivative debt instruments designated as net investment hedges at September 30, 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 and swap agreements related to the sale of a portion of its Class B common shares of Visa Inc. Refer to Note 16 for further information on the Visa restructuring and related card association litigation.
	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-					Notional				Fair			Weighted-
			Value		Value			Average					Value				Value			Average
								Remaining												Remaining
								Maturity												Maturity
								In Years												In Years
	September 30, 2014
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	1,750	$	21			3.65				$	1,000			$	4			9.96
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			1,972		15			3.73					4,084				351			1.81
	Receive fixed/pay floating swaps			5,500		6			0.15					–				–			–
	Net investment hedges
	Foreign exchange forward contracts			1,043		29			0.05					–				–			–
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			2,981		20			0.09					1,422				4			0.05
	Sell			2,691		10			0.1					4,077				22			0.11
	Options
	Purchased			2,100		–			0.07					–				–			–
	Written			2,349		32			0.08					8				1			0.08
	Receive fixed/pay floating swaps			3,375		6			10.22					232				3			10.22
	Pay fixed/receive floating swaps			–		–			–					55				–			10.22
	Foreign exchange forward contracts			1,049		11			0.02					3,576				38			0.01
	Equity contracts			27		–			1.13					57				1			0.72
	Credit contracts			1,263		3			3.4					2,288				5			3.04
	Other (a)			722		15			0.01					1,017				51			1.17
	Total		$	26,822	$	168							$	17,816			$	480
	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
	(a)	Includes short-term underwriting purchase and sale commitments with total asset and liability notional values of $722 million at September 30, 2014, and derivative liability swap agreements related to the sale of a portion of the Company’s Class B common shares of Visa Inc. These swap agreements had a total notional value, fair value and weighted average remaining maturity of $295 million, $42 million and 4.01 years at September 30, 2014, respectively.
The following table summarizes the customer-related derivative positions of the Company:
		Asset Derivatives										Liability Derivatives
(Dollars in Millions)		Notional		Fair			Weighted-					Notional				Fair			Weighted-
		Value		Value			Average					Value				Value			Average
							Remaining												Remaining
							Maturity												Maturity
							In Years												In Years
September 30, 2014
Interest rate contracts
Receive fixed/pay floating swaps		$	16,055	$	645			5.94				$	8,509			$	47			4.33
Pay fixed/receive floating swaps			7,215		54			3.98					16,384				638			5.86
Options
Purchased			4,110		10			3.84					24				–			2.67
Written			24		–			2.67					4,096				10			3.85
Futures
Buy			2,439		–			0.25					–				–			–
Sell			334		–			1.28					131				–			0.96
Foreign exchange rate contracts
Forwards, spots and swaps			13,349		595			0.55					13,212				575			0.55
Options
Purchased			751		22			0.57					–				–			–
Written			–		–			–					751				22			0.57
Total		$	44,277	$	1,326							$	43,107			$	1,292
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):
		Three Months Ended September 30,														Nine Months Ended September 30,
		Gains (Losses)					Gains (Losses)									Gains (Losses)						Gains (Losses)
		Recognized in					Reclassified from									Recognized in						Reclassified from
		Other Comprehensive					Other Comprehensive									Other Comprehensive						Other Comprehensive
		Income					Income									Income						Income
		(Loss)					(Loss) into Earnings									(Loss)						(Loss) into Earnings
(Dollars in Millions)		2014		2013			2014			2013						2014			2013			2014			2013
Asset and Liability Management Positions
Cash flow hedges
Interest rate contracts (a)		$	10	$	(11	)	$	(28	)	$	(30	)				$	(12	)	$	22		$	(86	)	$	(88	)
Net investment hedges
Foreign exchange forward contracts		$	84		(29	)		–			–					$	93			(23	)		–			–
Note: Ineffectiveness on cash flow and net investment hedges was not material for the three and nine months ended September 30, 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:
		Location of		Three Months						Nine Months
		Gains (Losses)		Ended September 30,						Ended September 30,
(Dollars in Millions)		Recognized in Earnings		2014			2013			2014				2013
Asset and Liability Management Positions
Fair value hedges (a)
Interest rate contracts		Other noninterest income		$	(19	)	$	–		$	(13	)		$	(7	)
Other economic hedges
Interest rate contracts
Futures and forwards		Mortgage banking revenue			6			33			(69	)			569
Purchased and written options		Mortgage banking revenue			64			54			210				200
Receive fixed/pay floating swaps		Mortgage banking revenue			17			(5	)		238				(264	)
Foreign exchange forward contracts		Commercial products revenue			(24	)		(16	)		(41	)			18
Equity contracts		Compensation expense			–			–			1				1
Credit contracts		Other noninterest income/expense			–			2			–				1
Other		Other noninterest income/expense			1			–			(42	)			–
Customer-Related Positions
Interest rate contracts
Receive fixed/pay floating swaps		Other noninterest income			(20	)		13			329				(288	)
Pay fixed/receive floating swaps		Other noninterest income			28			(10	)		(307	)			298
Foreign exchange rate contracts
Forwards, spots and swaps		Commercial products revenue			13			15			45				36
(a)	Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $19 million and zero million for the three months ended September 30, 2014 and 2013, respectively, and $13 million and $7 million for the nine months ended September 30, 2014 and 2013, respectively. The ineffective portion was immaterial for the three and nine months ended September 30, 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 September 30, 2014, was $868 million. At September 30, 2014, the Company had $697 million of cash posted as collateral against this net liability position.

Netting_Arrangements_for_Certa

Netting Arrangements for Certain Financial Instruments	9 Months Ended
	Sep. 30, 2014
Text Block [Abstract]	'
Netting Arrangements for Certain Financial Instruments	'
	Note 14	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 $132.0 billion total notional amount of derivative positions at September 30, 2014, $27.6 billion related to those centrally cleared through clearinghouses and $3.3 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 under collateral support agreements, 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. In general, securities used as collateral can be sold, repledged or otherwise used by the party in possession. No restrictions exist on the use of cash collateral by either party. Refer to Note 13 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 of these 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 the
			Recognized		Offset on the			Presented on the		Consolidated Balance Sheet
			Assets		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral			Net Amount
										Instruments (b)			Received (c)
	September 30, 2014
	Derivative assets (d)		$	1,363	$	(670	)	$	693	$	(36	)	$	–		$	657
	Reverse repurchase agreements			107		–			107		(56	)		(51	)		–
	Securities borrowed			583		–			583		(14	)		(551	)		18
	Total		$	2,053	$	(670	)	$	1,383	$	(106	)	$	(602	)	$	675
	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 $156 million and $124 million of cash collateral related payables that were netted against derivative assets at September 30, 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 $131 million and $55 million of derivative assets centrally cleared or otherwise not subject to netting arrangements at September 30, 2014 and December 31, 2013, respectively.
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on the
			Recognized		Offset on the			Presented on the		Consolidated Balance Sheet
			Liabilities		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral			Net
										Instruments (b)			Pledged (c)			Amount
	September 30, 2014
	Derivative liabilities (d)		$	1,569	$	(1,127	)	$	442	$	(36	)	$	–		$	406
	Repurchase agreements			686		–			686		(56	)		(630	)		–
	Securities loaned			87		–			87		(14	)		(72	)		1
	Total		$	2,342	$	(1,127	)	$	1.215	$	(106	)	$	(702	)	$	407
	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 $613 million and $717 million of cash collateral related receivables that were netted against derivative liabilities at September 30, 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 $203 million and $119 million of derivative liabilities centrally cleared or otherwise not subject to netting arrangements at September 30, 2014 and December 31, 2013, respectively.

Fair_Values_of_Assets_and_Liab

Fair Values of Assets and Liabilities	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Values of Assets and Liabilities	'
	Note 15	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, MSRs and substantially all MLHFS 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 in which the transfers occur. During the nine months ended September 30, 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 described 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 risk management 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 nine months ended September 30, 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 $4 million net gain and a $5 million net loss for the three months ended September 30, 2014 and 2013, respectively, and a $102 million net gain and a $326 million net loss for the nine months ended September 30, 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 is estimated using discounted cash flow analyses and other valuation techniques. The expected cash flows of loans consider historical prepayment experiences and estimated credit losses and are 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 7 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 the risk management department. The credit assumptions are compared to actual results quarterly and are recalibrated as appropriate.
	The Company also has other derivative contracts that are created through its operations, including commitments to purchase and originate mortgage loans and swap agreements executed in conjunction with the sale of a portion of its Class B common shares of Visa Inc. (“the Visa swaps”). Refer to Note 16 for further information on the Visa restructuring and related card association litigation. The 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. The Visa swaps require payments by either the Company or the purchaser of the Visa Inc. Class B common shares when there are changes in the conversion rate of the Visa Inc. Class B common shares to Visa Inc. Class A common shares, as well as quarterly payments to the purchaser based on specified terms of the agreements. The fair value of the Visa swaps are calculated using a discounted cash flow methodology which includes unobservable inputs about the timing and settlement amounts related to the resolution of certain Visa related litigation, as the expected litigation resolution impacts the Visa Inc. Class B common share to Visa Inc. Class A common share conversion rate, as well as the ultimate termination date for the Visa swaps. Accordingly, the Visa swaps are classified within Level 3. The Company’s corporate development department determines the valuation for the Visa swaps. Management reviews and updates the Visa swaps fair value in conjunction with its review of Visa related litigation contingencies, and the associated escrow funding.
	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 6 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 September 30, 2014:
			Minimum			Maximum				Average
	Residential Prime Non-Agency Mortgage-Backed Securities (a)
	Estimated lifetime prepayment rates			6	%		20	%			14	%
	Lifetime probability of default rates			–			8				4
	Lifetime loss severity rates			15			75				36
	Discount margin			2			4				3
	Residential Non-Prime Non-Agency Mortgage-Backed Securities (b)
	Estimated lifetime prepayment rates			3	%		10	%			6	%
	Lifetime probability of default rates			4			14				8
	Lifetime loss severity rates			20			70				53
	Discount margin			1			5				2
	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			6			6				6
	(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 September 30, 2014:
			Minimum			Maximum				Average
	Expected prepayment			10	%		20	%			11	%
	Discount rate			9			13				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. In addition, the Company’s Visa swaps are classified within Level 3.
	The significant unobservable inputs used in the fair value measurement of the Company’s derivative commitments to 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 purchase and originate mortgage loans at September 30, 2014:
			Minimum			Maximum				Average
	Expected loan close rate			42	%		100	%			76	%
	Inherent MSR value (basis points per loan)			48			214				129
	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 September 30, 2014, the minimum, maximum and average credit valuation adjustment as a percentage of the derivative contract fair value prior to adjustment was 0 percent, 93 percent and 7 percent, respectively.
	The significant unobservable inputs used in the fair value measurement of the Visa swaps are management’s estimate of the probability of certain litigation scenarios, and the timing of the resolution of the related litigation loss estimates in excess, or shortfall, of the Company’s proportional share of escrow funds. An increase in the loss estimate or a delay in the resolution of the related litigation would result in an increase in the derivative liability. A decrease in the loss estimate or an acceleration of the resolution of the related litigation would result in a decrease in the derivative liability.
	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
September 30, 2014
Available-for-sale securities
U.S. Treasury and agencies		$	1,345		$	1,333			$	–			$	–			$	2,678
Mortgage-backed securities
Residential
Agency			–			41,837				–				–				41,837
Non-agency
Prime (a)			–			–				426				–				426
Non-prime (b)			–			–				284				–				284
Commercial
Agency			–			122				–				–				122
Asset-backed securities
Collateralized debt obligations/Collateralized loan obligations			–			23				–				–				23
Other			–			558				64				–				622
Obligations of state and political subdivisions			–			5,563				–				–				5,563
Obligations of foreign governments			–			6				–				–				6
Corporate debt securities			–			630				9				–				639
Perpetual preferred securities			–			220				–				–				220
Other investments			235			19				–				–				254
Total available-for-sale			1,580			50,311				783				–				52,674
Mortgage loans held for sale			–			3,918				–				–				3,918
Mortgage servicing rights			–			–				2,461				–				2,461
Derivative assets			–			937				557				(670	)			824
Other assets			157			1,026				–				–				1,183
Total		$	1,737		$	56,192			$	3,801			$	(670	)		$	61,060
Derivative liabilities		$	–		$	1,680			$	92			$	(1,127	)		$	645
Short-term borrowings (c)			160			608				–				–				768
Total		$	160		$	2,288			$	92			$	(1,127	)		$	1,413
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 September 30:
(Dollars in Millions)		Beginning			Net Gains				Net Gains				Purchases				Sales				Principal				Issuances				Settlements				End				Net Change in
		of Period			(Losses)				(Losses)												Payments												of Period				Unrealized Gains
		Balance			Included in				Included in																								Balance				(Losses) Relating
					Net Income				Other																												to Assets and
									Comprehensive																												Liabilities
									Income (Loss)																												Still Held at
																																					End of Period
2014
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	447		$	–			$	2			$	–			$	–			$	(23	)		$	–			$	–			$	426			$	2
Non-prime (b)			286			–				6				–				–				(8	)			–				–				284				6
Asset-backed securities
Other			66			–				–				–				–				(2	)			–				–				64				–
Corporate debt securities			9			–				–				–				–				–				–				–				9				–
Total available-for-sale			808			–				8	(e)			–				–				(33	)			–				–				783				8
Mortgage servicing rights			2,412			(61	) (c)			–				1				–				–				109	(f)			–				2,461				(61	) (c)
Net derivative assets and liabilities			558			95	(d)			–				–				(1	)			–				–				(187	)			465				(15	) (g)
2013
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	547		$	(2	)		$	(4	)		$	–			$	–			$	(41	)		$	–			$	–			$	500			$	(4	)
Non-prime (b)			319			(3	)			(4	)			–				–				(9	)			–				–				303				(4	)
Asset-backed securities
Other			40			1				(2	)			3				–				(2	)			–				–				40				(2	)
Corporate debt securities			9			–				–				–				–				–				–				–				9				–
Total available-for-sale			915			(4	) (h)			(10	) (e)			3				–				(52	)			–				–				852				(10	)
Mortgage servicing rights			2,377			11	(c)			–				2				–				–				187	(f)			–				2,577				11	(c)
Net derivative assets and liabilities			423			182	(i)			–				–				(2	)			–				–				14				617				55	(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 $7 million included in other noninterest income and $88 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 $(65) million included in other noninterest income and $50 million included in mortgage banking revenue.
(h)	Approximately $(3) million included in securities gains (losses) and $(1) million included in interest income.
(i)	Approximately $89 million included in other noninterest income and $93 million included in mortgage banking revenue.
(j)	Approximately $(28) million included in other noninterest income and $83 million included in mortgage banking revenue.
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 nine months ended September 30:
(Dollars in Millions)		Beginning			Net				Net Gains				Purchases				Sales				Principal				Issuances				Settlements				End				Net Change in
		of Period			Gains				(Losses)												Payments												of Period				Unrealized Gains
		Balance			(Losses)				Included in																								Balance				(Losses) Relating
					Included				Other																												to Assets and
					in Net				Comprehensive																												Liabilities
					Income				Income (Loss)																												Still Held at
																																					End of Period
2014
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	478		$	–			$	14			$	–			$	–			$	(66	)		$	–			$	–			$	426			$	14
Non-prime (b)			297			(4	)			14				–				–				(23	)			–				–				284				14
Asset-backed securities
Other			63			2				1				4				–				(6	)			–				–				64				1
Corporate debt securities			9			–				–				–				–				–				–				–				9				–
Total available-for-sale			847			(2	) (c)			29	(f)			4				–				(95	)			–				–				783				29
Mortgage servicing rights			2,680			(345	) (d)			–				3				(141	)			–				264	(g)			–				2,461				(345	) (d)
Net derivative assets and liabilities			445			568	(e)			–				1				(1	)			–				–				(548	)			465				80	(h)
2013
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	624		$	(6	)		$	4			$	–			$	–			$	(122	)		$	–			$	–			$	500			$	4
Non-prime (b)			355			(11	)			13				–				(20	)			(34	)			–				–				303				14
Asset-backed securities
Other			15			2				(1	)			28				–				(4	)			–				–				40				(1	)
Corporate debt securities			9			–				–				–				–				–				–				–				9				–
Total available-for-sale			1,003			(15	) (i)			16	(f)			28				(20	)			(160	)			–				–				852				17
Mortgage servicing rights			1,700			196	(d)			–				7				–				–				674	(g)			–				2,577				196	(d)
Net derivative assets and liabilities			1,179			(34	) (j)			–				1				(4	)			–				–				(525	)			617				(218	) (k)
(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 securities gains (losses).
(d)	Included in mortgage banking revenue.
(e)	Approximately $215 million included in other noninterest income and $353 million included in mortgage banking revenue.
(f)	Included in changes in unrealized gains and losses on securities available-for-sale.
(g)	Represents MSRs capitalized during the period.
(h)	Approximately $30 million included in other noninterest income and $50 million included in mortgage banking revenue.
(i)	Approximately $(13) million included in securities gains (losses) and $(2) million included in interest income.
(j)	Approximately $(122) million included in other noninterest income and $88 million included in mortgage banking revenue.
(k)	Approximately $(301) million included in other noninterest income and $83 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:
		September 30, 2014																	December 31, 2013
(Dollars in Millions)		Level 1			Level 2				Level 3				Total						Level 1				Level 2				Level 3				Total
Loans (a)		$	–		$	–			$	142			$	142					$	–			$	–			$	128			$	128
Other assets (b)			–			–				84				84						–				–				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:
		Three Months									Nine Months
		Ended September 30,									Ended September 30,
(Dollars in Millions)		2014			2013						2014				2013
Loans (a)		$	21		$	22					$	68			$	55
Other assets (b)			17			14						51				73
(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:
		September 30, 2014													December 31, 2013
(Dollars in Millions)		Fair			Aggregate				Carrying						Fair				Aggregate				Carrying
		Value			Unpaid				Amount Over						Value				Unpaid				Amount Over
		Carrying			Principal				(Under) Unpaid						Carrying				Principal				(Under) Unpaid
		Amount							Principal						Amount								Principal
Total loans		$	3,918		$	3,784			$	134					$	3,263			$	3,195			$	68
Nonaccrual loans			8			12				(4	)					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 September 30, 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:
		September 30, 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		$	6,183				$	6,183			$	–			$	–			$	6,183					$	8,477					$	8,477			$	–			$	–	$	8,477
Federal funds sold and securities purchased under resale agreements			168					–				168				–				168						163						–				163				–		163
Investment securities held-to-maturity			44,231					1,905				42,093				96				44,094						38,920						2,589				35,678				101		38,368
Loans held for sale (a)			21					–				–				21				21						5						–				–				5		5
Loans (b)			241,384					–				–				243,700				243,700						230,857						–				–				231,480		231,480
Other financial instruments			2,227					–				944				1,289				2,233						2,443						–				1,080				1,383		2,463
Financial Liabilities
Deposits			273,097					–				273,147				–				273,147						262,123						–				262,200				–		262,200
Short-term borrowings (c)			29,277					–				29,134				–				29,134						26,945						–				26,863				–		26,863
Long-term debt			30,768					–				31,220				–				31,220						20,049						–				20,391				–		20,391
Other liabilities			1,307					–				–				1,307				1,307						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 $433 million and $382 million at September 30, 2014 and December 31, 2013, respectively. The carrying value of other guarantees was $235 million and $278 million at September 30, 2014 and December 31, 2013, respectively.

Guarantees_and_Contingent_Liab

Guarantees and Contingent Liabilities	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Guarantees and Contingent Liabilities	'
	Note 16	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 September 30, 2014, the carrying amount of the Company’s liability related to the Visa Litigation matters, net of its share of the escrow fundings, was $19 million. The Company sold 3.0 million and .4 million of its Class B shares during the second and third quarters of 2014, respectively. These sales do not impact the Company’s liability for the Visa Litigation matters or the receivable related to the escrow account. The remaining 9.2 million Class B shares held by the Company will be eligible for conversion to Class A shares of Visa Inc., 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 15.
	Other Guarantees and Contingent Liabilities
	The following table is a summary of other guarantees and contingent liabilities of the Company at September 30, 2014:
	(Dollars in Millions)		Collateral			Carrying			Maximum
			Held			Amount			Potential
									Future
									Payments
	Standby letters of credit		$	–		$	63		$	15,201
	Third-party borrowing arrangements			–			–			16
	Securities lending indemnifications			5,166			–			5,002
	Asset sales			–			160			4,040	(a)
	Merchant processing			780			66			92,835
	Contingent consideration arrangements			–			2			2
	Tender option bond program guarantee			4,079			–			3,915
	Minimum revenue guarantees			–			7			7
	Other			–			–			525
	(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 September 30, 2014, the value of airline tickets purchased to be delivered at a future date was $6.8 billion. The Company held collateral of $648 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 September 30, 2014, the Company had reserved $62 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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Balance at beginning of period		$	69		$	190		$	83		$	240
	Net realized losses			(1	)		(13	)		(13	)		(52	)
	Change in reserve			(6	)		(1	)		(8	)		(12	)
	Balance at end of period		$	62		$	176		$	62		$	176
	As of September 30, 2014 and December 31, 2013, the Company had $29 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.
	The Company is currently subject to investigations and examinations by government agencies and bank regulators concerning mortgage-related practices, including those related to compliance with selling guidelines relating to residential home loans sold to GSEs, foreclosure-related expenses submitted to the Federal Housing Administration or GSEs for reimbursement, and various practices related to lender-placed insurance. The Company is also regularly subject to examinations and inquiries in areas of increasing regulatory scrutiny, such as compliance, risk management, third party management, consumer protection, anti-money laundering and Office of Foreign Assets Control requirements. The Company is cooperating fully with these examinations, inquiries 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).
	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).
	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, will not be material to its financial statements. The Company’s estimates are subject to significant judgment and uncertainties, and the matters underlying the estimates 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	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Note 17	Subsequent Events
	The Company has evaluated the impact of events that have occurred subsequent to September 30, 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)	9 Months Ended
	Sep. 30, 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.
Revenue Recognition	'
	Revenue Recognition In May 2014, the Financial Accounting Standards Board issued accounting guidance, effective for the Company on January 1, 2017, related to revenue recognition from contracts with customers, which amends certain currently existing revenue recognition accounting guidance. The guidance allows for either retrospective application to all periods presented or a modified retrospective approach where the guidance would only be applied to existing contracts in effect at the adoption date and new contracts going forward. The Company is currently evaluating the impact of this guidance under the modified retrospective approach and expects the adoption will not be material to its financial statements.
Loans and Allowance for Credit Losses	'
	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 reflects 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, historical loss experience is also incorporated 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.
	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 when 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 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.
	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.
	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 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 distinct restructuring 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.
	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 accounting and disclosure purposes 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.
Accounting for Transfers and Servicing of Financial Assets	'
	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.
	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 7. 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.
Variable Interest Entities	'
	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 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.
	In addition, the Company sponsors entities to which it transfers tax-advantaged investments to third parties.
	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.
Netting Arrangements for Certain Financial Instruments	'
	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 under collateral support agreements, 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. In general, securities used as collateral can be sold, repledged or otherwise used by the party in possession. No restrictions exist on the use of cash collateral by either party.
	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 of these 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.
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, MSRs and substantially all MLHFS 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 in which the transfers occur. During the nine months ended September 30, 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 described 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 risk management 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.

Basis_of_Presentation_Tables

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [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 September 30		2014				2013				Percent					2014				2013				Percent
	(Dollars in Millions)										Change													Change
	Condensed Income Statement
	Net interest income (taxable-equivalent basis)		$	518			$	506				2.4	%			$	1,074			$	1,153				(6.9	)%
	Noninterest income			236				266				(11.3	)				669				717				(6.7	)
	Securities gains (losses), net			–				–				–					–				–				–
	Total net revenue			754				772				(2.3	)				1,743				1,870				(6.8	)
	Noninterest expense			304				302				0.7					1,169				1,110				5.3
	Other intangibles			1				2				(50.0	)				12				10				20
	Total noninterest expense			305				304				0.3					1,181				1,120				5.4
	Income before provision and income taxes			449				468				(4.1	)				562				750				(25.1	)
	Provision for credit losses			29				(41	)			*					79				163				(51.5	)
	Income before income taxes			420				509				(17.5	)				483				587				(17.7	)
	Income taxes and taxable-equivalent adjustment			153				185				(17.3	)				176				214				(17.8	)
	Net income			267				324				(17.6	)				307				373				(17.7	)
	Net (income) loss attributable to noncontrolling interests			–				–				–					–				–				–
	Net income attributable to U.S. Bancorp		$	267			$	324				(17.6	)			$	307			$	373				(17.7	)
	Average Balance Sheet
	Commercial		$	59,048			$	51,302				15.1	%			$	9,439			$	8,584				10	%
	Commercial real estate			21,160				19,683				7.5					18,899				18,069				4.6
	Residential mortgages			19				24				(20.8	)				50,544				48,130				5
	Credit card			–				–				–					–				–				–
	Other retail			4				6				(33.3	)				46,594				44,727				4.2
	Total loans, excluding covered loans			80,231				71,015				13					125,476				119,510				5
	Covered loans			174				340				(48.8	)				5,688				6,434				(11.6	)
	Total loans			80,405				71,355				12.7					131,164				125,944				4.1
	Goodwill			1,648				1,604				2.7					3,680				3,515				4.7
	Other intangible assets			21				24				(12.5	)				2,664				2,650				0.5
	Assets			87,449				77,708				12.5					145,604				140,621				3.5
	Noninterest-bearing deposits			32,684				30,812				6.1					24,696				22,585				9.3
	Interest checking			11,270				10,031				12.4					36,881				33,007				11.7
	Savings products			19,082				15,067				26.6					51,229				46,532				10.1
	Time deposits			17,961				22,362				(19.7	)				17,816				20,718				(14.0	)
	Total deposits			80,997				78,272				3.5					130,622				122,842				6.3
	Total U.S. Bancorp shareholders’ equity			7,764				7,366				5.4					11,504				12,222				(5.9	)
			Wholesale Banking and													Consumer and Small
			Commercial Real Estate													Business Banking
	Nine Months Ended September 30		2014				2013				Percent					2014				2013				Percent
	(Dollars in Millions)										Change													Change
	Condensed Income Statement
	Net interest income (taxable-equivalent basis)		$	1,521			$	1,501				1.3	%			$	3,241			$	3,459				(6.3	)%
	Noninterest income			738				819				(9.9	)				1,967				2,268				(13.3	)
	Securities gains (losses), net			–				–				–					–				–				–
	Total net revenue			2,259				2,320				(2.6	)				5,208				5,727				(9.1	)
	Noninterest expense			930				920				1.1					3,421				3,377				1.3
	Other intangibles			3				6				(50.0	)				29				31				(6.5	)
	Total noninterest expense			933				926				0.8					3,450				3,408				1.2
	Income before provision and income taxes			1,326				1,394				(4.9	)				1,758				2,319				(24.2	)
	Provision for credit losses			26				(114	)			*					332				573				(42.1	)
	Income before income taxes			1,300				1,508				(13.8	)				1,426				1,746				(18.3	)
	Income taxes and taxable-equivalent adjustment			473				549				(13.8	)				519				636				(18.4	)
	Net income			827				959				(13.8	)				907				1,110				(18.3	)
	Net (income) loss attributable to noncontrolling interests			–				–				–					–				–				–
	Net income attributable to U.S. Bancorp		$	827			$	959				(13.8	)			$	907			$	1,110				(18.3	)
	Average Balance Sheet
	Commercial		$	57,029			$	50,232				13.5	%			$	8,903			$	8,567				3.9	%
	Commercial real estate			20,879				19,375				7.8					18,771				17,741				5.8
	Residential mortgages			20				27				(25.9	)				50,443				46,251				9.1
	Credit card			–				–				–					–				–				–
	Other retail			4				7				(42.9	)				45,964				44,739				2.7
Total loans, excluding covered loans			77,932				69,641				11.9					124,081				117,298				5.8
Covered loans			205				394				(48.0	)				5,871				6,690				(12.2	)
Total loans			78,137				70,035				11.6					129,952				123,988				4.8
Goodwill			1,621				1,604				1.1					3,577				3,516				1.7
Other intangible assets			21				26				(19.2	)				2,698				2,293				17.7
Assets			85,198				76,455				11.4					143,337				140,056				2.3
Noninterest-bearing deposits			32,029				30,299				5.7					23,218				21,976				5.7
Interest checking			11,042				10,378				6.4					35,832				32,841				9.1
Savings products			17,929				13,320				34.6					49,496				46,106				7.4
Time deposits			18,217				18,450				(1.3	)				18,080				21,591				(16.3	)
Total deposits			79,217				72,447				9.3					126,626				122,514				3.4
Total U.S. Bancorp shareholders’ equity			7,653				7,269				5.3					11,480				12,125				(5.3	)
*	Not meaningful
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
$	96			$	82				17.1	%			$	442			$	393				12.5	%			$	618		$	580			6.6	%	$	2,748		$	2,714			1.3	%
	352				314				12.1					842				822				2.4					146			61			*			2,245			2,180			3
	–				–				–					–				–				–					(3	)		(3	)		–			(3	)		(3	)		–
	448				396				13.1					1,284				1,215				5.7					761			638			19.3			4,990			4,891			2
	335				324				3.4					582				575				1.2					173			199			(13.1	)		2,563			2,510			2.1
	8				9				(11.1	)				30				34				(11.8	)				–			–			–			51			55			(7.3	)
	343				333				3					612				609				0.5					173			199			(13.1	)		2,614			2,565			1.9
	105				63				66.7					672				606				10.9					588			439			33.9			2,376			2,326			2.1
	6				6				–					190				172				10.5					7			(2	)		*			311			298			4.4
	99				57				73.7					482				434				11.1					581			441			31.7			2,065			2,028			1.8
	36				21				71.4					175				158				10.8					39			20			95			579			598			(3.2	)
	63				36				75					307				276				11.2					542			421			28.7			1,486			1,430			3.9
	–				–				–					(9	)			(10	)			10					(6	)		48			*			(15	)		38			*
$	63			$	36				75				$	298			$	266				12				$	536		$	469			14.3		$	1,471		$	1,468			0.2
$	1,968			$	1,772				11.1	%			$	6,681			$	6,191				7.9	%			$	209		$	215			(2.8	)%	$	77,345		$	68,064			13.6	%
	601				655				(8.2	)				–				–				–					179			94			90.4			40,839			38,501			6.1
	1,430				984				45.3					–				–				–					1			1			–			51,994			49,139			5.8
	–				–				–					17,753				16,931				4.9					–			–			–			17,753			16,931			4.9
	1,436				1,532				(6.3	)				664				729				(8.9	)				–			–			–			48,698			46,994			3.6
	5,435				4,943				10					25,098				23,851				5.2					389			310			25.5			236,629			219,629			7.7
	3				17				(82.4	)				5				5				–					1,368			2,937			(53.4	)		7,238			9,733			(25.6	)
	5,438				4,960				9.6					25,103				23,856				5.2					1,757			3,247			(45.9	)		243,867			229,362			6.3
	1,572				1,533				2.5					2,517				2,509				0.3					–			–			–			9,417			9,161			2.8
	155				166				(6.6	)				483				557				(13.3	)				–			2			*			3,323			3,399			(2.2	)
	8,679				7,751				12					31,407				30,123				4.3					112,684			95,958			17.4			385,823			352,161			9.6
	14,900				13,500				10.4					702				714				(1.7	)				1,144			653			75.2			74,126			68,264			8.6
	5,729				4,741				20.8					573				455				25.9					1			1			–			54,454			48,235			12.9
	30,373				26,326				15.4					81				60				35					100			80			25			100,865			88,065			14.5
	3,939				4,182				(5.8	)				–				–				–					1,847			542			*			41,563			47,804			(13.1	)
	54,941				48,749				12.7					1,356				1,229				10.3					3,092			1,276			*			271,008			252,368			7.4
	2,267				2,398				(5.5	)				5,690				6,102				(6.8	)				15,907			11,848			34.3			43,132			39,936			8
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
$	270			$	257				5.1	%			$	1,271			$	1,168				8.8	%			$	1,895		$	1,710			10.8	%	$	8,198		$	8,095			1.3	%
	1,038				935				11					2,449				2,397				2.2					600			191			*			6,792			6,610			2.8
	–				–				–					–				–				–					2			8			(75.0	)		2			8			(75.0	)
	1,308				1,192				9.7					3,720				3,565				4.3					2,497			1,909			30.8			14,992			14,713			1.9
	1,002				968				3.5					1,742				1,695				2.8					668			465			43.7			7,763			7,425			4.6
	25				27				(7.4	)				91				103				(11.7	)				–			–			–			148			167			(11.4	)
	1,027				995				3.2					1,833				1,798				1.9					668			465			43.7			7,911			7,592			4.2
	281				197				42.6					1,887				1,767				6.8					1,829			1,444			26.7			7,081			7,121			(.6	)
	8				7				14.3					573				553				3.6					2			44			(95.5	)		941			1,063			(11.5	)
	273				190				43.7					1,314				1,214				8.2					1,827			1,400			30.5			6,140			6,058			1.4
	100				69				44.9					478				442				8.1					163			101			61.4			1,733			1,797			(3.6	)
	173				121				43					836				772				8.3					1,664			1,299			28.1			4,407			4,261			3.4
	–				–				–					(27	)			(29	)			6.9					(17	)		148			*			(44	)		119			*
$	173			$	121				43				$	809			$	743				8.9				$	1,647		$	1,447			13.8		$	4,363		$	4,380			(.4	)
$	1,910			$	1,686				13.3	%			$	6,402			$	6,030				6.2	%			$	180		$	204			(11.8	)%	$	74,424		$	66,719			11.5	%
	608				656				(7.3	)				–				–				–					207			100			*			40,465			37,872			6.8
	1,335				776				72					–				–				–					1			1			–			51,799			47,055			10.1
	–				–				–					17,516				16,627				5.3					–			–			–			17,516			16,627			5.3
	1,450				1,544				(6.1	)				680				744				(8.6	)				–			–			–			48,098			47,034			2.3
	5,303				4,662				13.7					24,598				23,401				5.1					388			305			27.2			232,302			215,307			7.9
	5				14				(64.3	)				5				5				–					1,710			3,272			(47.7	)		7,796			10,375			(24.9	)
	5,308				4,676				13.5					24,603				23,406				5.1					2,098			3,577			(41.3	)		240,098			225,682			6.4
	1,568				1,529				2.6					2,518				2,508				0.4					–			–			–			9,284			9,157			1.4
	163				174				(6.3	)				494				584				(15.4	)				–			2			*			3,376			3,079			9.6
	8,409				7,514				11.9					30,901				29,659				4.2					107,202			97,364			10.1			375,047			351,048			6.8
	15,095				13,786				9.5					704				694				1.4					1,228			428			*			72,274			67,183			7.6
	5,494				4,683				17.3					559				444				25.9					1			1			–			52,928			48,347			9.5
	28,650				27,070				5.8					76				54				40.7					103			85			21.2			96,254			86,635			11.1
	4,111				5,237				(21.5	)				–				–				–					1,798			841			*			42,206			46,119			(8.5	)
	53,350				50,776				5.1					1,339				1,192				12.3					3,130			1,355			*			263,662			248,284			6.2
	2,283				2,375				(3.9	)				5,675				6,033				(5.9	)				15,407			11,873			29.8			42,498			39,675			7.1

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	Table 4	Investment Securities
			Available-for-Sale																Held-to-Maturity
	At September 30, 2014		Amortized			Fair			Weighted-				Weighted-						Amortized				Fair		Weighted-		Weighted-
	(Dollars in Millions)		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		$	27		$	27			0.3				4.17	%				$	80			$	81		0.7		1.36	%
	Maturing after one year through five years			1,385			1,387			3.7				1.39						1,096				1,096		3.9		1.42
	Maturing after five years through ten years			1,179			1,163			8.1				2.83						1,445				1,412		7.8		2.2
	Maturing after ten years			101			101			18.5				1.38						58				58		10.8		1.73
	Total		$	2,692		$	2,678			6.1				2.05	%				$	2,679			$	2,647		6.1		1.85	%
	Mortgage-Backed Securities(a)
	Maturing in one year or less		$	565		$	573			0.7				1.81	%				$	120			$	120		0.8		1.16	%
	Maturing after one year through five years			24,490			24,625			3.8				2.02						28,283				28,200		3.6		2.12
	Maturing after five years through ten years			16,133			16,121			5.7				1.62						12,674				12,640		5.6		1.55
	Maturing after ten years			1,355			1,350			12.5				1.21						343				346		12.7		1.17
	Total		$	42,543		$	42,669			4.8				1.84	%				$	41,420			$	41,306		4.3		1.94	%
	Asset-Backed Securities(a)
	Maturing in one year or less		$	–		$	–			–				–	%				$	1			$	1		0.7		0.78	%
	Maturing after one year through five years			271			281			3.5				2.32						6				9		2.9		0.89
	Maturing after five years through ten years			357			364			7				2.15						7				8		6.3		0.81
	Maturing after ten years			–			–			–				–						–				7		15.5		0.88
	Total		$	628		$	645			5.5				2.23	%				$	14			$	25		4.8		0.84	%
	Obligations of State and Political Subdivisions(b)(c)
	Maturing in one year or less		$	724		$	742			0.6				6.66	%				$	–			$	–		0.4		11.64	%
	Maturing after one year through five years			4,121			4,334			2.3				6.79						2				2		2.2		8.31
	Maturing after five years through ten years			448			453			6.9				4.76						1				1		7.4		8.14
	Maturing after ten years			34			34			18				5.06						7				7		11.4		2.51
	Total		$	5,327		$	5,563			2.5				6.59	%				$	10			$	10		9		4.54	%
	Other Debt Securities
	Maturing in one year or less		$	6		$	6			0.4				1.01	%				$	2			$	2		–		1.78	%
	Maturing after one year through five years			–			–			–				–						82				82		1.2		1.13
	Maturing after five years through ten years			–			–			–				–						24				22		6.1		0.97
	Maturing after ten years			690			639			18.7				2.47						–				–		–		–
	Total		$	696		$	645			18.6				2.45	%				$	108			$	106		2.2		1.11	%
	Other Investments		$	428		$	474			14.4				2.3	%				$	–			$	–		–		–	%
	Total investment securities (d)		$	52,314		$	52,674			4.9				2.35	%				$	44,231			$	44,094		4.4		1.93	%
	(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.
			September 30, 2014								December 31, 2013
	(Dollars in Millions)		Amortized			Percent					Amortized				Percent
			Cost			of Total					Cost				of Total
	U.S. Treasury and agencies		$	5,371			5.5	%			$	4,222				5.3	%
	Mortgage-backed securities			83,963			87					68,236				85.3
	Asset-backed securities			642			0.7					652				0.8
	Obligations of state and political subdivisions			5,337			5.5					5,685				7.1
	Other debt securities and investments			1,232			1.3					1,184				1.5
	Total investment securities		$	96,545			100	%			$	79,979				100	%
Investment Securities Held to Maturity	'
	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 securities were as follows:
			September 30, 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		$	2,679		$	8		$	–			$	(40	)		$	2,647					$	3,114	$	5	$	–		$	(79	)	$	3,040
	Mortgage-backed securities
	Residential
	Agency			41,419			244			–				(358	)			41,305						35,671		187		–			(665	)		35,193
	Non-agency non-prime (d)			1			–			–				–				1						1		–		–			–			1
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			8			–				–				8						–		9		–			–			9
	Other			14			4			(1	)			–				17						16		4		(1	)		(1	)		18
	Obligations of state and political subdivisions			10			–			–				–				10						12		–		–			–			12
	Obligations of foreign governments			9			–			–				–				9						7		–		–			–			7
	Other debt securities			99			–			–				(2	)			97						99		–		–			(11	)		88
	Total held-to-maturity		$	44,231		$	264		$	(1	)		$	(400	)		$	44,094					$	38,920	$	205	$	(1	)	$	(756	)	$	38,368
	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.
Investment Securities 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 available-for-sale investment securities were as follows:
			September 30, 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
	Available-for-sale (b)
	U.S. Treasury and agencies		$	2,692		$	7		$	–			$	(21	)		$	2,678					$	1,108	$	4	$	–		$	(67	)	$	1,045
	Mortgage-backed securities
	Residential
	Agency			41,734			524			–				(421	)			41,837						31,633		449		–			(529	)		31,553
	Non-agency
	Prime (c)			420			11			(4	)			(1	)			426						486		4		(8	)		(4	)		478
	Non-prime (d)			270			15			(1	)			–				284						297		5		(5	)		–			297
	Commercial agency			119			3			–				–				122						148		4		–			–			152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			19			4			–				–				23						20		4		–			–			24
	Other			609			13			–				–				622						616		13		–			–			629
	Obligations of state and political subdivisions			5,327			239			–				(3	)			5,563						5,673		116		–			(51	)		5,738
	Obligations of foreign governments			6			–			–				–				6						6		–		–			–			6
	Corporate debt securities			690			3			–				(54	)			639						734		–		–			(94	)		640
	Perpetual preferred securities			201			27			–				(8	)			220						205		24		–			(17	)		212
	Other investments			227			27			–				–				254						133		28		–			–			161
	Total available-for-sale		$	52,314		$	873		$	(5	)		$	(508	)		$	52,674					$	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.
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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014				2013
	Taxable		$	419		$	357		$	1,203			$	1,029
	Non-taxable			57			63			175				193
	Total interest income from investment securities		$	476		$	420		$	1,378			$	1,222
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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014				2013
	Realized gains		$	–		$	–		$	8			$	21
	Realized losses			–			–			–				–
	Net realized gains (losses)		$	–		$	–		$	8			$	21
	Income tax (benefit) on net realized gains (losses)		$	–		$	–		$	3			$	8
Summary of Other-than-Temporary Impairment by Investment Category	'
	The following tables summarize other-than-temporary impairment by investment category:
			2014										2013
	Three Months Ended September 30		Losses			Other Gains			Total				Losses				Other Gains				Total
	(Dollars in Millions)		Recorded			(Losses) (c)							Recorded in				(Losses) (c)
			in Earnings										Earnings
	Available-for-sale
	Mortgage-backed securities
	Non-agency residential
	Prime (a)		$	–		$	–		$	–			$	(1	)		$	–			$	(1	)
	Non-prime (b)			–			–			–				(2	)			1				(1	)
	Perpetual preferred securities			(3	)		–			(3	)			–				–				–
	Total available-for-sale		$	(3	)	$	–		$	(3	)		$	(3	)		$	1			$	(2	)
	(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.
			2014										2013
	Nine Months Ended September 30		Losses			Other Gains			Total				Losses				Other Gains				Total
	(Dollars in Millions)		Recorded			(Losses) (c)							Recorded in				(Losses) (c)
			in Earnings										Earnings
	Available-for-sale
	Mortgage-backed securities
	Prime (a)		$	(1	)	$	1		$	–			$	(5	)		$	2			$	(3	)
	Non-prime (b)			(2	)		–			(2	)			(8	)			6				(2	)
	Perpetual preferred securities			(3	)		–			(3	)			–				–				–
	Total available-for-sale		$	(6	)	$	1		$	(5	)		$	(13	)		$	8			$	(5	)
	(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.
Significant Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Determined to be 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 September 30, 2014:
			Non-Prime (a)
			Minimum			Maximum			Average
	Estimated lifetime prepayment rates			8	%		10	%		8	%
	Lifetime probability of default rates			6			8			8
	Lifetime loss severity rates			40			55			42
	(a)	Includes all securities not meeting the conditions to be designated as prime.
Changes in Credit Losses on Debt Securities Excluding Perpetual Preferred Securities	'
	Changes in the credit losses on debt securities (excluding perpetual preferred securities) are summarized as follows:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014				2013
	Balance at beginning of period		$	111		$	124		$	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			–			3			3				13
	Total other-than-temporary impairment on debt securities			–			3			3				13
	Other Changes in Credit Losses
	Increases in expected cash flows			(2	)		(1	)		(4	)			(2	)
	Realized losses (a)			(4	)		(4	)		(10	)			(18	)
	Credit losses on security sales and securities expected to be sold			–			–			–				(5	)
	Balance at end of period		$	105		$	122		$	105			$	122
	(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.
Gross Unrealized Losses and Fair Value of Company's Investment Securities	'
	At September 30, 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 September 30, 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		$	577		$	(2	)	$	968			$	(38	)		$	1,545			$	(40	)
	Residential agency mortgage-backed securities			11,469			(76	)		9,607				(282	)			21,076				(358	)
	Other asset-backed securities			–			–			6				(1	)			6				(1	)
	Other debt securities			–			–			22				(2	)			22				(2	)
	Total held-to-maturity		$	12,046		$	(78	)	$	10,603			$	(323	)		$	22,649			$	(401	)
	Available-for-sale
	U.S. Treasury and agencies		$	1,173		$	(1	)	$	825			$	(20	)		$	1,998			$	(21	)
	Mortgage-backed securities
	Residential
	Agency			9,519			(91	)		8,317				(330	)			17,836				(421	)
	Non-agency (a)
	Prime (b)			40			(1	)		114				(4	)			154				(5	)
	Non-prime (c)			12			–			22				(1	)			34				(1	)
	Other asset-backed securities			2			–			24				–				26				–
	Obligations of state and political subdivisions			15			–			217				(3	)			232				(3	)
	Obligations of foreign governments			6			–			–				–				6				–
	Corporate debt securities			–			–			453				(54	)			453				(54	)
	Perpetual preferred securities			45			–			76				(8	)			121				(8	)
	Total available-for-sale		$	10,812		$	(93	)	$	10,048			$	(420	)		$	20,860			$	(513	)
	(a)	The Company has $6 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)	9 Months Ended
	Sep. 30, 2014
Receivables [Abstract]	'
Composition of Loan Portfolio	'
	The composition of the loan portfolio, disaggregated by class and underlying specific portfolio type, was as follows:
			September 30, 2014								December 31, 2013
	(Dollars in Millions)		Amount			Percent					Amount				Percent
						of Total									of Total
	Commercial
	Commercial		$	73,600			30	%			$	64,762				27.5	%
	Lease financing			5,278			2.1					5,271				2.3
	Total commercial			78,878			32.1					70,033				29.8
	Commercial Real Estate
	Commercial mortgages			31,802			13					32,183				13.7
	Construction and development			9,107			3.7					7,702				3.3
	Total commercial real estate			40,909			16.7					39,885				17
	Residential Mortgages
	Residential mortgages			38,858			15.8					37,545				15.9
	Home equity loans, first liens			13,099			5.3					13,611				5.8
	Total residential mortgages			51,957			21.1					51,156				21.7
	Credit Card			17,858			7.3					18,021				7.7
	Other Retail
	Retail leasing			5,999			2.5					5,929				2.5
	Home equity and second mortgages			15,769			6.4					15,442				6.6
	Revolving credit			3,242			1.3					3,276				1.4
	Installment			6,173			2.5					5,709				2.4
	Automobile			14,517			5.9					13,743				5.8
	Student			3,235			1.3					3,579				1.5
	Total other retail			48,935			19.9					47,678				20.2
	Total loans, excluding covered loans			238,537			97.1					226,773				96.4
	Covered Loans			7,054			2.9					8,462				3.6
	Total loans		$	245,591			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								Nine Months Ended
			September 30,								September 30,
	(Dollars in Millions)		2014			2013					2014				2013
	Balance at beginning of period		$	1,487		$	1,802				$	1,655			$	1,709
	Accretion			(105	)		(119	)				(336	)			(380	)
	Disposals			(34	)		(51	)				(103	)			(120	)
	Reclassifications from nonaccretable difference (a)			38			119					172				177
	Other (b)			–			–					(2	)			365
	Balance at end of period		$	1,386		$	1,751				$	1,386			$	1,751
	(a)	Primarily relates to changes in expected credit performance.
	(b)	The amount for the nine months ended September 30, 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 56 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 by Portfolio Type	'
	Activity in the allowance for credit losses by portfolio class was as follows:
	Three Months Ended September 30		Commercial			Commercial			Residential				Credit				Other				Total Loans,				Covered				Total
	(Dollars in Millions)					Real Estate			Mortgages				Card				Retail				Excluding				Loans				Loans
																					Covered Loans
	2014
	Balance at beginning of period		$	1,111		$	725		$	848			$	874			$	779			$	4,337			$	112			$	4,449
	Add
	Provision for credit losses			83			(6	)		(13	)			162				84				310				1				311
	Deduct
	Loans charged off			80			10			48				174				96				408				2				410
	Less recoveries of loans charged off			(22	)		(6	)		(6	)			(16	)			(23	)			(73	)			(1	)			(74	)
	Net loans charged off			58			4			42				158				73				335				1				336
	Other changes (a)			–			–			–				–				–				–				(10	)			(10	)
	Balance at end of period		$	1,136		$	715		$	793			$	878			$	790			$	4,312			$	102			$	4,414
	2013
	Balance at beginning of period		$	1,023		$	777		$	921			$	874			$	838			$	4,433			$	179			$	4,612
	Add
	Provision for credit losses			19			(22	)		70				151				84				302				(4	)			298
	Deduct
	Loans charged off			65			17			62				175				122				441				9				450
	Less recoveries of loans charged off			(54	)		(23	)		(5	)			(15	)			(24	)			(121	)			(1	)			(122	)
	Net loans charged off			11			(6	)		57				160				98				320				8				328
	Other changes (a)			–			–			–				–				–				–				(4	)			(4	)
	Balance at end of period		$	1,031		$	761		$	934			$	865			$	824			$	4,415			$	163			$	4,578
	(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, and the impact of any loan sales.
	Nine Months Ended September 30		Commercial			Commercial			Residential				Credit				Other				Total Loans,				Covered				Total
	(Dollars in Millions)					Real Estate			Mortgages				Card				Retail				Excluding				Loans				Loans
																					Covered Loans
	2014
	Balance at beginnng of period		$	1,075		$	776		$	875			$	884			$	781			$	4,391			$	146			$	4,537
	Add
	Provision for credit losses			210			(64	)		74				495				227				942				(1	)			941
	Deduct
	Loans charged off			219			27			171				546				291				1,254				10				1,264
	Less recoveries of loans charged off			(70	)		(30	)		(15	)			(48	)			(73	)			(236	)			(2	)			(238	)
	Net loans charged off			149			(3	)		156				498				218				1,018				8				1,026
	Other changes (a)			–			–			–				(3	)			–				(3	)			(35	)			(38	)
	Balance at end of period		$	1,136		$	715		$	793			$	878			$	790			$	4,312			$	102			$	4,414
	2013
	Balance at beginnng of period		$	1,051		$	857		$	935			$	863			$	848			$	4,554			$	179			$	4,733
	Add
	Provision for credit losses			64			(100	)		222				495				305				986				77				1,063
	Deduct
	Loans charged off			184			76			243				559				412				1,474				31				1,505
	Less recoveries of loans charged off			(100	)		(80	)		(20	)			(66	)			(83	)			(349	)			(3	)			(352	)
	Net loans charged off			84			(4	)		223				493				329				1,125				28				1,153
	Other changes (a)			–			–			–				–				–				–				(65	)			(65	)
	Balance at end of period		$	1,031		$	761		$	934			$	865			$	824			$	4,415			$	163			$	4,578
	(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, and the impact of any loan sales.
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 September 30, 2014 Related to
	Loans individually evaluated for impairment (a)		$	10		$	6		$	–			$	–			$	–			$	16			$	–			$	16
	TDRs collectively evaluated for impairment			13			15			308				64				44				444				3				447
	Other loans collectively evaluated for impairment			1,113			662			485				814				746				3,820				2				3,822
	Loans acquired with deteriorated credit quality			–			32			–				–				–				32				97				129
	Total allowance for credit losses		$	1,136		$	715		$	793			$	878			$	790			$	4,312			$	102			$	4,414
	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
	September 30, 2014
	Loans individually evaluated for impairment (a)		$	237		$	158		$	–			$	–			$	–			$	395			$	52			$	447
	TDRs collectively evaluated for impairment			129			273			4,916				256				248				5,822				74				5,896
	Other loans collectively evaluated for impairment			78,511			40,368			47,041				17,602				48,687				232,209				3,615				235,824
	Loans acquired with deteriorated credit quality			1			110			–				–				–				111				3,313				3,424
	Total loans		$	78,878		$	40,909		$	51,957			$	17,858			$	48,935			$	238,537			$	7,054			$	245,591
	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, Including Delinquency Status of those that Continue to Accrue Interest and are Nonperforming	'
	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
	September 30, 2014
	Commercial		$	78,453		$	215		$	37			$	173			$	78,878
	Commercial real estate			40,606			50			12				241				40,909
	Residential mortgages (a)			50,662			243			211				841				51,957
	Credit card			17,403			219			196				40				17,858
	Other retail			48,453			222			76				184				48,935
	Total loans, excluding covered loans			235,577			949			532				1,479				238,537
	Covered loans			6,434			102			430				88				7,054
	Total loans		$	242,011		$	1,051		$	962			$	1,567			$	245,591
	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 September 30, 2014, $422 million of loans 30–89 days past due and $3.1 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
	September 30, 2014
	Commercial		$	76,688		$	1,396		$	794			$	2,190			$	78,878
	Commercial real estate			39,591			474			844				1,318				40,909
	Residential mortgages (b)			50,817			8			1,132				1,140				51,957
	Credit card			17,622			–			236				236				17,858
	Other retail			48,569			18			348				366				48,935
	Total loans, excluding covered loans			233,287			1,896			3,354				5,250				238,537
	Covered loans			6,852			3			199				202				7,054
	Total loans		$	240,139		$	1,899		$	3,553			$	5,452			$	245,591
	Total outstanding commitments		$	494,015		$	2,990		$	4,201			$	7,191			$	501,206
	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 September 30, 2014, $3.1 billion of GNMA loans 90 days or more past due and $2.5 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
	September 30, 2014
	Commercial		$	408		$	848		$	27			$	135
	Commercial real estate			525			1,037			30				14
	Residential mortgages			2,740			3,678			261				–
	Credit card			256			256			64				–
	Other retail			368			413			47				4
	Total impaired loans, excluding GNMA and covered loans			4,297			6,232			429				153
	Loans purchased from GNMA mortgage pools			2,478			2,478			51				–
	Covered loans			295			607			20				1
	Total		$	7,070		$	9,317		$	500			$	154
	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 September 30, 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
	(Dollars in Millions)		Average			Interest					Average				Interest
			Recorded			Income					Recorded				Income
			Investment			Recognized					Investment				Recognized
	Three Months Ended September 30
	Commercial		$	425		$	4				$	380			$	5
	Commercial real estate			541			4					819				6
	Residential mortgages			2,740			33					2,765				32
	Credit card			264			1					347				3
	Other retail			373			5					417				7
	Total impaired loans, excluding GNMA and covered loans			4,343			47					4,728				53
	Loans purchased from GNMA mortgage pools			2,647			29					1,883				22
	Covered loans			335			5					519				6
	Total		$	7,325		$	81				$	7,130			$	81
	Nine Months Ended September 30
	Commercial		$	430		$	8				$	384			$	24
	Commercial real estate			598			17					950				27
	Residential mortgages			2,744			105					2,744				99
	Credit card			281			7					380				12
	Other retail			381			13					431				19
	Total impaired loans, excluding GNMA and covered loans			4,434			150					4,889				181
	Loans purchased from GNMA mortgage pools			2,691			95					1,869				68
	Covered loans			389			15					588				21
	Total		$	7,514		$	260				$	7,346			$	270
Summary of Loans Modified as TDRs	'
	The following table provides a summary of loans modified as TDRs during the periods presented by portfolio class:
			2014												2013
	(Dollars in Millions)		Number			Pre-Modification			Post-Modification						Number				Pre-Modification				Post-Modification
			of Loans			Outstanding			Outstanding						of Loans				Outstanding				Outstanding
						Loan Balance			Loan Balance										Loan Balance				Loan Balance
	Three Months Ended September 30
	Commercial			448		$	28		$	26						551			$	62			$	60
	Commercial real estate			27			14			13						48				76				73
	Residential mortgages			525			71			70						338				42				42
	Credit card			6,708			35			36						6,447				39				38
	Other retail			810			18			18						847				21				21
	Total loans, excluding GNMA and covered loans			8,518			166			163						8,231				240				234
	Loans purchased from GNMA mortgage pools			2,273			278			278						2,315				300				284
	Covered loans			18			3			3						38				19				11
	Total loans			10,809		$	447		$	444						10,584			$	559			$	529
	Nine Months Ended September 30
	Commercial			1,633		$	181		$	169						1,962			$	150			$	140
	Commercial real estate			54			33			28						147				193				186
	Residential mortgages			1,732			232			231						1,575				214				210
	Credit card			20,040			111			112						20,147				122				122
	Other retail			2,246			52			52						3,519				86				85
	Total loans, excluding GNMA and covered loans			25,705			609			592						27,350				765				743
	Loans purchased from GNMA mortgage pools			7,198			816			803						6,450				822				782
	Covered loans			38			14			13						109				85				64
	Total loans			32,941		$	1,439		$	1,408						33,909			$	1,672			$	1,589
Summary of Loans Modified as TDRs in the Past Twelve Months that have Subsequently Defaulted	'
	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
	(Dollars in Millions)		Number			Amount					Number				Amount
			of Loans			Defaulted					of Loans				Defaulted
	Three Months Ended September 30
	Commercial			161		$	34					143			$	37
	Commercial real estate			4			–					30				18
	Residential mortgages			147			22					303				41
	Credit card			1,665			9					1,485				8
	Other retail			146			5					278				10
	Total loans, excluding GNMA and covered loans			2,123			70					2,239				114
	Loans purchased from GNMA mortgage pools			366			41					492				69
	Covered loans			4			1					24				25
	Total loans			2,493		$	112					2,755			$	208
	Nine Months Ended September 30
	Commercial			456		$	42					483			$	42
	Commercial real estate			16			10					72				90
	Residential mortgages			424			61					673				100
	Credit card			4,586			25					5,109				29
	Other retail			489			15					1,164				53
	Total loans, excluding GNMA and covered loans			5,971			153					7,501				314
	Loans purchased from GNMA mortgage pools			542			63					4,795				615
	Covered loans			14			5					49				37
	Total loans			6,527		$	221					12,345			$	966
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:
			September 30, 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		$	–		$	21		$	–			$	21					$	–			$	32			$	–			$	32
	Commercial real estate loans			464			1,093			–				1,557						738				1,494				–				2,232
	Residential mortgage loans			2,849			774			–				3,623						3,037				890				–				3,927
	Credit card loans			–			4			–				4						–				5				–				5
	Other retail loans			–			605			–				605						–				666				–				666
	Losses reimbursable by the FDIC (a)			–			–			737				737						–				–				798				798
	Unamortized changes in FDIC asset (b)			–			–			507				507						–				–				802				802
	Covered loans			3,313			2,497			1,244				7,054						3,775				3,087				1,600				8,462
	Foreclosed real estate			–			–			72				72						–				–				97				97
	Total covered assets		$	3,313		$	2,497		$	1,316			$	7,126					$	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)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [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)	September 30, 2014		December 31, 2013
	Investment carrying amount	$	4,385	$	4,178
	Unfunded capital and other commitments		1,850		1,661
	Maximum exposure to loss		8,038		7,390

Mortgage_Servicing_Rights_Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 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						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Balance at beginning of period		$	2,412		$	2,377		$	2,680		$	1,700
	Rights purchased			1			2			3			7
	Rights capitalized			109			187			264			674
	Rights sold			–			–			(141	)		–
	Changes in fair value of MSRs
	Due to fluctuations in market interest rates (a)			29			71			(129	)		503
	Due to revised assumptions or models (b)			15			42			71			33
	Other changes in fair value (c)			(105	)		(102	)		(287	)		(340	)
	Balance at end of period		$	2,461		$	2,577		$	2,461		$	2,577
	(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 MSRs 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:
			September 30, 2014																		December 31, 2013
				Down			Down			Down			Up			Up			Up			Down			Down			Down			Up			Up			Up
	(Dollars in Millions)		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		$	(490	)	$	(212	)	$	(99	)	$	84		$	157		$	297		$	(435	)	$	(199	)	$	(93	)	$	82		$	154		$	287
	Derivative instrument hedges			391			196			94			(87	)		(167	)		(319	)		399			194			91			(82	)		(157	)		(301	)
	Net sensitivity		$	(99	)	$	(16	)	$	(5	)	$	(3	)	$	(10	)	$	(22	)	$	(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:
			September 30, 2014												December 31, 2013
	(Dollars in Millions)		MRBP			Government			Conventional (b)			Total			MRBP			Government			Conventional (b)			Total
	Servicing portfolio		$	18,052		$	40,600		$	163,757		$	222,409		$	15,896		$	41,659		$	169,287		$	226,842
	Fair value		$	199		$	469		$	1,793		$	2,461		$	180		$	500		$	2,000		$	2,680
	Value (bps) (a)			110			116			109			111			113			120			118			118
	Weighted-average servicing fees (bps)			37			33			27			29			39			32			29			30
	Multiple (value/servicing fees)			2.97			3.52			4.04			3.83			2.9			3.75			4.07			3.93
	Weighted-average note rate			4.62	%		4.2	%		4.15	%		4.2	%		4.7	%		4.24	%		4.17	%		4.22	%
	Weighted-average age (in years)			3.7			3.1			3			3.1			3.8			2.6			2.5			2.6
	Weighted-average expected prepayment (constant prepayment rate)			12.9	%		12.4	%		10.6	%		11.1	%		13.5	%		11.5	%		10.9	%		11.2	%
	Weighted-average expected life (in years)			6.2			6.4			7			6.8			6.2			6.9			7.2			7.1
	Weighted-average discount rate			11.9	%		11.2	%		9.6	%		10.1	%		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)	9 Months Ended
	Sep. 30, 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 were as follows:
			September 30, 2014								December 31, 2013
				Shares								Shares
				Issued and		Liquidation				Carrying		Issued and		Liquidation				Carrying
	(Dollars in Millions)		Outstanding		Preference		Discount		Amount		Outstanding		Preference		Discount		Amount
	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 September 30, 2014 and December 31, 2013, was $1.00 per share.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 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 is as follows:
	Three Months Ended September 30	Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign Currency			Total
	(Dollars in Millions)	(Losses) on			(Losses) on			(Losses) on			(Losses) on			Translation
		Securities			Securities			Derivative			Retirement Plans
		Available-For-			Transferred From			Hedges
		Sale			Available-For-Sale
					to Held-To-
					Maturity
	2014
	Balance at beginning of period	$	233		$	60		$	(225	)	$	(699	)	$	(51	)	$	(682	)
	Changes in unrealized gains and losses		(21	)		–			16			–			–			(5	)
	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		3			(7	)		45			35			–			76
	Applicable income taxes		7			3			(23	)		(14	)		(2	)		(29	)
	Balance at end of period	$	222		$	56		$	(187	)	$	(678	)	$	(49	)	$	(636	)
	2013
	Balance at beginning of period	$	185		$	84		$	(313	)	$	(1,184	)	$	(60	)	$	(1,288	)
	Changes in unrealized gains and losses		(237	)		–			(17	)	$	38			–			(216	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		1			–			–			–			–			1
	Foreign currency translation adjustment		–			–			–			–			13			13
	Reclassification to earnings of realized gains and losses		3			(13	)		47			62			–			99
	Applicable income taxes		89			5			(11	)		(38	)		(5	)		40
	Balance at end of period	$	41		$	76		$	(294	)	$	(1,122	)	$	(52	)	$	(1,351	)
	Nine Months Ended September 30	Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign Currency			Total
	(Dollars in Millions)	(Losses) on			(Losses) on			(Losses) on			(Losses) on			Translation
		Securities			Securities			Derivative			Retirement Plans
		Available-For-			Transferred From			Hedges
		Sale			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		486			–			(19	)		–			–			467
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		1			–			–			–			–			1
	Foreign currency translation adjustment		–			–			–			–			18			18
	Reclassification to earnings of realized gains and losses		(2	)		(23	)		139			107			–			221
	Applicable income taxes		(186	)		9			(46	)		(42	)		(7	)		(272	)
	Balance at end of period	$	222		$	56		$	(187	)	$	(678	)	$	(49	)	$	(636	)
	2013
	Balance at beginning of period	$	679		$	107		$	(404	)	$	(1,265	)	$	(40	)	$	(923	)
	Changes in unrealized gains and losses		(1,032	)		–			33			37			–			(962	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale		8			–			–			–			–			8
	Foreign currency translation adjustment		–			–			–			–			(20	)		(20	)
	Reclassification to earnings of realized gains and losses		(8	)		(50	)		142			186			–			270
	Applicable income taxes		394			19			(65	)		(80	)		8			276
	Balance at end of period	$	41		$	76		$	(294	)	$	(1,122	)	$	(52	)	$	(1,351	)
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 (loss) and into earnings, is as follows:
		Impact to Net Income
		Three Months Ended September 30,						Nine Months Ended September 30,						Affected Line Item in the
	(Dollars in Millions)	2014			2013			2014			2013			Consolidated Statement of Income
	Unrealized gains (losses) on securities available-for-sale
	Realized gains (losses) on sale of securities	$	–		$	–		$	8		$	21		Total securities gains (losses), net
	Other-than-temporary impairment recognized in earnings		(3	)		(3	)		(6	)		(13	)
			(3	)		(3	)		2			8		Total before tax
			1			1			(1	)		(3	)	Applicable income taxes
			(2	)		(2	)		1			5		Net-of-tax
	Unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity
	Amortization of unrealized gains		7			13			23			50		Interest income
			(3	)		(5	)		(9	)		(19	)	Applicable income taxes
			4			8			14			31		Net-of-tax
	Unrealized gains (losses) on derivative hedges
	Realized gains (losses) on derivative hedges		(45	)		(47	)		(139	)		(142	)	Net interest income
			17			18			53			55		Applicable income taxes
			(28	)		(29	)		(86	)		(87	)	Net-of-tax
	Unrealized gains (losses) on retirement plans
	Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization		(35	)		(62	)		(107	)		(186	)	Employee benefits expense
			14			24			42			72		Applicable income taxes
			(21	)		(38	)		(65	)		(114	)	Net-of-tax
	Total impact to net income	$	(47	)	$	(61	)	$	(136	)	$	(165	)

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Components of Earnings Per Share	'
	The components of earnings per share were:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	(Dollars and Shares in Millions, Except Per Share Data)		2014			2013			2014			2013
	Net income attributable to U.S. Bancorp		$	1,471		$	1,468		$	4,363		$	4,380
	Preferred dividends			(60	)		(61	)		(181	)		(189	)
	Impact of preferred stock redemption (a)			–			–			–			(8	)
	Earnings allocated to participating stock awards			(6	)		(7	)		(19	)		(20	)
	Net income applicable to U.S. Bancorp common shareholders		$	1,405		$	1,400		$	4,163		$	4,163
	Average common shares outstanding			1,798			1,832			1,809			1,844
	Net effect of the exercise and assumed purchase of stock awards			9			11			10			10
	Average diluted common shares outstanding			1,807			1,843			1,819			1,854
	Earnings per common share		$	0.78		$	0.76		$	2.3		$	2.26
	Diluted earnings per common share		$	0.78		$	0.76		$	2.29		$	2.25
	(a)	Represents stock issuance costs originally recorded in capital surplus upon the issuance of the Company’s Series D Non-Cumulative Perpetual Preferred Stock that were reclassified to retained earnings on the redemption date.

Employee_Benefits_Tables

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 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 September 30,												Nine Months Ended September 30,
								Postretirement												Postretirement
		Pension Plans						Welfare Plan						Pension Plans						Welfare Plan
	(Dollars in Millions)	2014			2013			2014			2013			2014			2013			2014			2013
	Service cost	$	38		$	42		$	–		$	1		$	114		$	126		$	–		$	3
	Interest cost		50			43			1			1			148			128			3			3
	Expected return on plan assets		(51	)		(44	)		(1	)		–			(155	)		(132	)		(1	)		(1	)
	Prior service cost (credit) and transition obligation (asset) amortization		(2	)		(1	)		(1	)		–			(4	)		(4	)		(3	)		–
	Actuarial loss (gain) amortization		39			66			(1	)		(3	)		118			198			(4	)		(8	)
	Net periodic benefit cost	$	74		$	106		$	(2	)	$	(1	)	$	221		$	316		$	(5	)	$	(3	)

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Components of Income Tax Expense	'
	The components of income tax expense were:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(Dollars in Millions)	2014			2013			2014			2013
	Federal
	Current	$	423		$	390		$	1,334		$	1,506
	Deferred		10			57			(19	)		(35	)
	Federal income tax		433			447			1,315			1,471
	State
	Current		101			84			268			161
	Deferred		(11	)		11			(17	)		(3	)
	State income tax		90			95			251			158
	Total income tax provision	$	523		$	542		$	1,566		$	1,629
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						Nine Months Ended
		September 30,						September 30,
	(Dollars in Millions)	2014			2013			2014			2013
	Tax at statutory rate	$	704		$	690		$	2,091		$	2,061
	State income tax, at statutory rates, net of federal tax benefit		62			62			163			102
	Tax effect of
	Tax credits and benefits, net of related expenses		(186	)		(176	)		(535	)		(394	)
	Tax-exempt income		(51	)		(52	)		(154	)		(159	)
	Noncontrolling interests		(5	)		13			(15	)		42
	Other items		(1	)		5			16			(23	)
	Applicable income taxes	$	523		$	542		$	1,566		$	1,629

Derivative_Instruments_Tables

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 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-					Notional				Fair			Weighted-
			Value		Value			Average					Value				Value			Average
								Remaining												Remaining
								Maturity												Maturity
								In Years												In Years
	September 30, 2014
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	1,750	$	21			3.65				$	1,000			$	4			9.96
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			1,972		15			3.73					4,084				351			1.81
	Receive fixed/pay floating swaps			5,500		6			0.15					–				–			–
	Net investment hedges
	Foreign exchange forward contracts			1,043		29			0.05					–				–			–
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			2,981		20			0.09					1,422				4			0.05
	Sell			2,691		10			0.1					4,077				22			0.11
	Options
	Purchased			2,100		–			0.07					–				–			–
	Written			2,349		32			0.08					8				1			0.08
	Receive fixed/pay floating swaps			3,375		6			10.22					232				3			10.22
	Pay fixed/receive floating swaps			–		–			–					55				–			10.22
	Foreign exchange forward contracts			1,049		11			0.02					3,576				38			0.01
	Equity contracts			27		–			1.13					57				1			0.72
	Credit contracts			1,263		3			3.4					2,288				5			3.04
	Other (a)			722		15			0.01					1,017				51			1.17
	Total		$	26,822	$	168							$	17,816			$	480
	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
	(a)	Includes short-term underwriting purchase and sale commitments with total asset and liability notional values of $722 million at September 30, 2014, and derivative liability swap agreements related to the sale of a portion of the Company’s Class B common shares of Visa Inc. These swap agreements had a total notional value, fair value and weighted average remaining maturity of $295 million, $42 million and 4.01 years at September 30, 2014, respectively.
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-					Notional				Fair			Weighted-
			Value		Value			Average					Value				Value			Average
								Remaining												Remaining
								Maturity												Maturity
								In Years												In Years
	September 30, 2014
	Interest rate contracts
	Receive fixed/pay floating swaps		$	16,055	$	645			5.94				$	8,509			$	47			4.33
	Pay fixed/receive floating swaps			7,215		54			3.98					16,384				638			5.86
	Options
	Purchased			4,110		10			3.84					24				–			2.67
	Written			24		–			2.67					4,096				10			3.85
	Futures
	Buy			2,439		–			0.25					–				–			–
	Sell			334		–			1.28					131				–			0.96
	Foreign exchange rate contracts
	Forwards, spots and swaps			13,349		595			0.55					13,212				575			0.55
	Options
	Purchased			751		22			0.57					–				–			–
	Written			–		–			–					751				22			0.57
	Total		$	44,277	$	1,326							$	43,107			$	1,292
	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):
			Three Months Ended September 30,														Nine Months Ended September 30,
			Gains (Losses)					Gains (Losses)									Gains (Losses)						Gains (Losses)
			Recognized in					Reclassified from									Recognized in						Reclassified from
			Other Comprehensive					Other Comprehensive									Other Comprehensive						Other Comprehensive
			Income					Income									Income						Income
			(Loss)					(Loss) into Earnings									(Loss)						(Loss) into Earnings
	(Dollars in Millions)		2014		2013			2014			2013						2014			2013			2014			2013
	Asset and Liability Management Positions
	Cash flow hedges
	Interest rate contracts (a)		$	10	$	(11	)	$	(28	)	$	(30	)				$	(12	)	$	22		$	(86	)	$	(88	)
	Net investment hedges
	Foreign exchange forward contracts		$	84		(29	)		–			–					$	93			(23	)		–			–
	Note: Ineffectiveness on cash flow and net investment hedges was not material for the three and nine months ended September 30, 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:
			Location of		Three Months						Nine Months
			Gains (Losses)		Ended September 30,						Ended September 30,
	(Dollars in Millions)		Recognized in Earnings		2014			2013			2014				2013
	Asset and Liability Management Positions
	Fair value hedges (a)
	Interest rate contracts		Other noninterest income		$	(19	)	$	–		$	(13	)		$	(7	)
	Other economic hedges
	Interest rate contracts
	Futures and forwards		Mortgage banking revenue			6			33			(69	)			569
	Purchased and written options		Mortgage banking revenue			64			54			210				200
	Receive fixed/pay floating swaps		Mortgage banking revenue			17			(5	)		238				(264	)
	Foreign exchange forward contracts		Commercial products revenue			(24	)		(16	)		(41	)			18
	Equity contracts		Compensation expense			–			–			1				1
	Credit contracts		Other noninterest income/expense			–			2			–				1
	Other		Other noninterest income/expense			1			–			(42	)			–
	Customer-Related Positions
	Interest rate contracts
	Receive fixed/pay floating swaps		Other noninterest income			(20	)		13			329				(288	)
	Pay fixed/receive floating swaps		Other noninterest income			28			(10	)		(307	)			298
	Foreign exchange rate contracts
	Forwards, spots and swaps		Commercial products revenue			13			15			45				36
	(a)	Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $19 million and zero million for the three months ended September 30, 2014 and 2013, respectively, and $13 million and $7 million for the nine months ended September 30, 2014 and 2013, respectively. The ineffective portion was immaterial for the three and nine months ended September 30, 2014 and 2013.

Netting_Arrangements_for_Certa1

Netting Arrangements for Certain Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 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 the
			Recognized		Offset on the			Presented on the		Consolidated Balance Sheet
			Assets		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral			Net Amount
										Instruments (b)			Received (c)
	September 30, 2014
	Derivative assets (d)		$	1,363	$	(670	)	$	693	$	(36	)	$	–		$	657
	Reverse repurchase agreements			107		–			107		(56	)		(51	)		–
	Securities borrowed			583		–			583		(14	)		(551	)		18
	Total		$	2,053	$	(670	)	$	1,383	$	(106	)	$	(602	)	$	675
	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 $156 million and $124 million of cash collateral related payables that were netted against derivative assets at September 30, 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 $131 million and $55 million of derivative assets centrally cleared or otherwise not subject to netting arrangements at September 30, 2014 and December 31, 2013, respectively.
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on the
			Recognized		Offset on the			Presented on the		Consolidated Balance Sheet
			Liabilities		Consolidated			Consolidated
	(Dollars in Millions)				Balance Sheet (a)			Balance Sheet		Financial			Collateral			Net
										Instruments (b)			Pledged (c)			Amount
	September 30, 2014
	Derivative liabilities (d)		$	1,569	$	(1,127	)	$	442	$	(36	)	$	–		$	406
	Repurchase agreements			686		–			686		(56	)		(630	)		–
	Securities loaned			87		–			87		(14	)		(72	)		1
	Total		$	2,342	$	(1,127	)	$	1.215	$	(106	)	$	(702	)	$	407
	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 $613 million and $717 million of cash collateral related receivables that were netted against derivative liabilities at September 30, 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 $203 million and $119 million of derivative liabilities centrally cleared or otherwise not subject to netting arrangements at September 30, 2014 and December 31, 2013, respectively.

Fair_Values_of_Assets_and_Liab1

Fair Values of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2014:
			Minimum			Maximum				Average
	Residential Prime Non-Agency Mortgage-Backed Securities (a)
	Estimated lifetime prepayment rates			6	%		20	%			14	%
	Lifetime probability of default rates			–			8				4
	Lifetime loss severity rates			15			75				36
	Discount margin			2			4				3
	Residential Non-Prime Non-Agency Mortgage-Backed Securities (b)
	Estimated lifetime prepayment rates			3	%		10	%			6	%
	Lifetime probability of default rates			4			14				8
	Lifetime loss severity rates			20			70				53
	Discount margin			1			5				2
	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			6			6				6
	(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 September 30, 2014:
			Minimum			Maximum				Average
	Expected prepayment			10	%		20	%			11	%
	Discount rate			9			13				10
Valuation Assumption Ranges for Derivative Commitments	'
	The following table shows the significant valuation assumption ranges for the Company’s derivative commitments to purchase and originate mortgage loans at September 30, 2014:
			Minimum			Maximum				Average
	Expected loan close rate			42	%		100	%			76	%
	Inherent MSR value (basis points per loan)			48			214				129
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
	September 30, 2014
	Available-for-sale securities
	U.S. Treasury and agencies		$	1,345		$	1,333			$	–			$	–			$	2,678
	Mortgage-backed securities
	Residential
	Agency			–			41,837				–				–				41,837
	Non-agency
	Prime (a)			–			–				426				–				426
	Non-prime (b)			–			–				284				–				284
	Commercial
	Agency			–			122				–				–				122
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			23				–				–				23
	Other			–			558				64				–				622
	Obligations of state and political subdivisions			–			5,563				–				–				5,563
	Obligations of foreign governments			–			6				–				–				6
	Corporate debt securities			–			630				9				–				639
	Perpetual preferred securities			–			220				–				–				220
	Other investments			235			19				–				–				254
	Total available-for-sale			1,580			50,311				783				–				52,674
	Mortgage loans held for sale			–			3,918				–				–				3,918
	Mortgage servicing rights			–			–				2,461				–				2,461
	Derivative assets			–			937				557				(670	)			824
	Other assets			157			1,026				–				–				1,183
	Total		$	1,737		$	56,192			$	3,801			$	(670	)		$	61,060
	Derivative liabilities		$	–		$	1,680			$	92			$	(1,127	)		$	645
	Short-term borrowings (c)			160			608				–				–				768
	Total		$	160		$	2,288			$	92			$	(1,127	)		$	1,413
	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 September 30:
	(Dollars in Millions)		Beginning			Net Gains				Net Gains				Purchases				Sales				Principal				Issuances				Settlements				End				Net Change in
			of Period			(Losses)				(Losses)												Payments												of Period				Unrealized Gains
			Balance			Included in				Included in																								Balance				(Losses) Relating
						Net Income				Other																												to Assets and
										Comprehensive																												Liabilities
										Income (Loss)																												Still Held at
																																						End of Period
	2014
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime (a)		$	447		$	–			$	2			$	–			$	–			$	(23	)		$	–			$	–			$	426			$	2
	Non-prime (b)			286			–				6				–				–				(8	)			–				–				284				6
	Asset-backed securities
	Other			66			–				–				–				–				(2	)			–				–				64				–
	Corporate debt securities			9			–				–				–				–				–				–				–				9				–
	Total available-for-sale			808			–				8	(e)			–				–				(33	)			–				–				783				8
	Mortgage servicing rights			2,412			(61	) (c)			–				1				–				–				109	(f)			–				2,461				(61	) (c)
	Net derivative assets and liabilities			558			95	(d)			–				–				(1	)			–				–				(187	)			465				(15	) (g)
	2013
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime (a)		$	547		$	(2	)		$	(4	)		$	–			$	–			$	(41	)		$	–			$	–			$	500			$	(4	)
	Non-prime (b)			319			(3	)			(4	)			–				–				(9	)			–				–				303				(4	)
	Asset-backed securities
	Other			40			1				(2	)			3				–				(2	)			–				–				40				(2	)
	Corporate debt securities			9			–				–				–				–				–				–				–				9				–
	Total available-for-sale			915			(4	) (h)			(10	) (e)			3				–				(52	)			–				–				852				(10	)
	Mortgage servicing rights			2,377			11	(c)			–				2				–				–				187	(f)			–				2,577				11	(c)
	Net derivative assets and liabilities			423			182	(i)			–				–				(2	)			–				–				14				617				55	(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 $7 million included in other noninterest income and $88 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 $(65) million included in other noninterest income and $50 million included in mortgage banking revenue.
	(h)	Approximately $(3) million included in securities gains (losses) and $(1) million included in interest income.
	(i)	Approximately $89 million included in other noninterest income and $93 million included in mortgage banking revenue.
	(j)	Approximately $(28) million included in other noninterest income and $83 million included in mortgage banking revenue.
	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 nine months ended September 30:
	(Dollars in Millions)		Beginning			Net				Net Gains				Purchases				Sales				Principal				Issuances				Settlements				End				Net Change in
			of Period			Gains				(Losses)												Payments												of Period				Unrealized Gains
			Balance			(Losses)				Included in																								Balance				(Losses) Relating
						Included				Other																												to Assets and
						in Net				Comprehensive																												Liabilities
						Income				Income (Loss)																												Still Held at
																																						End of Period
	2014
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime (a)		$	478		$	–			$	14			$	–			$	–			$	(66	)		$	–			$	–			$	426			$	14
	Non-prime (b)			297			(4	)			14				–				–				(23	)			–				–				284				14
	Asset-backed securities
	Other			63			2				1				4				–				(6	)			–				–				64				1
	Corporate debt securities			9			–				–				–				–				–				–				–				9				–
	Total available-for-sale			847			(2	) (c)			29	(f)			4				–				(95	)			–				–				783				29
	Mortgage servicing rights			2,680			(345	) (d)			–				3				(141	)			–				264	(g)			–				2,461				(345	) (d)
	Net derivative assets and liabilities			445			568	(e)			–				1				(1	)			–				–				(548	)			465				80	(h)
	2013
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime (a)		$	624		$	(6	)		$	4			$	–			$	–			$	(122	)		$	–			$	–			$	500			$	4
Non-prime (b)			355			(11	)			13				–				(20	)			(34	)			–				–				303				14
Asset-backed securities
Other			15			2				(1	)			28				–				(4	)			–				–				40				(1	)
Corporate debt securities			9			–				–				–				–				–				–				–				9				–
Total available-for-sale			1,003			(15	) (i)			16	(f)			28				(20	)			(160	)			–				–				852				17
Mortgage servicing rights			1,700			196	(d)			–				7				–				–				674	(g)			–				2,577				196	(d)
Net derivative assets and liabilities			1,179			(34	) (j)			–				1				(4	)			–				–				(525	)			617				(218	) (k)
(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 securities gains (losses).
(d)	Included in mortgage banking revenue.
(e)	Approximately $215 million included in other noninterest income and $353 million included in mortgage banking revenue.
(f)	Included in changes in unrealized gains and losses on securities available-for-sale.
(g)	Represents MSRs capitalized during the period.
(h)	Approximately $30 million included in other noninterest income and $50 million included in mortgage banking revenue.
(i)	Approximately $(13) million included in securities gains (losses) and $(2) million included in interest income.
(j)	Approximately $(122) million included in other noninterest income and $88 million included in mortgage banking revenue.
(k)	Approximately $(301)million included in other noninterest income and $83 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:
			September 30, 2014																	December 31, 2013
	(Dollars in Millions)		Level 1			Level 2				Level 3				Total						Level 1				Level 2				Level 3				Total
	Loans (a)		$	–		$	–			$	142			$	142					$	–			$	–			$	128			$	128
	Other assets (b)			–			–				84				84						–				–				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:
			Three Months									Nine Months
			Ended September 30,									Ended September 30,
	(Dollars in Millions)		2014			2013						2014				2013
	Loans (a)		$	21		$	22					$	68			$	55
	Other assets (b)			17			14						51				73
	(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:
			September 30, 2014													December 31, 2013
	(Dollars in Millions)		Fair Value			Aggregate				Carrying						Fair				Aggregate				Carrying
			Carrying			Unpaid				Amount Over						Value				Unpaid				Amount Over
			Amount			Principal				(Under) Unpaid						Carrying				Principal				(Under) Unpaid
										Principal						Amount								Principal
	Total loans		$	3,918		$	3,784			$	134					$	3,263			$	3,195			$	68
	Nonaccrual loans			8			12				(4	)					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:
			September 30, 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		$	6,183				$	6,183			$	–			$	–			$	6,183					$	8,477					$	8,477			$	–			$	–	$	8,477
	Federal funds sold and securities purchased under resale agreements			168					–				168				–				168						163						–				163				–		163
	Investment securities held-to-maturity			44,231					1,905				42,093				96				44,094						38,920						2,589				35,678				101		38,368
	Loans held for sale (a)			21					–				–				21				21						5						–				–				5		5
	Loans (b)			241,384					–				–				243,700				243,700						230,857						–				–				231,480		231,480
	Other financial instruments			2,227					–				944				1,289				2,233						2,443						–				1,080				1,383		2,463
	Financial Liabilities
	Deposits			273,097					–				273,147				–				273,147						262,123						–				262,200				–		262,200
	Short-term borrowings (c)			29,277					–				29,134				–				29,134						26,945						–				26,863				–		26,863
	Long-term debt			30,768					–				31,220				–				31,220						20,049						–				20,391				–		20,391
	Other liabilities			1,307					–				–				1,307				1,307						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)	9 Months Ended
	Sep. 30, 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 September 30, 2014:
	(Dollars in Millions)		Collateral			Carrying			Maximum
			Held			Amount			Potential
									Future
									Payments
	Standby letters of credit		$	–		$	63		$	15,201
	Third-party borrowing arrangements			–			–			16
	Securities lending indemnifications			5,166			–			5,002
	Asset sales			–			160			4,040	(a)
	Merchant processing			780			66			92,835
	Contingent consideration arrangements			–			2			2
	Tender option bond program guarantee			4,079			–			3,915
	Minimum revenue guarantees			–			7			7
	Other			–			–			525
	(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.
Representation and Warranty Reserve Rollforward	'
	The following table is a rollforward of the Company’s representation and warranty reserve:
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	(Dollars in Millions)		2014			2013			2014			2013
	Balance at beginning of period		$	69		$	190		$	83		$	240
	Net realized losses			(1	)		(13	)		(13	)		(52	)
	Change in reserve			(6	)		(1	)		(8	)		(12	)
	Balance at end of period		$	62		$	176		$	62		$	176

Investment_Securities_Investme

Investment Securities - Investment Securities (Detail) (USD $)	9 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	$52,314		$41,059
Available-for-sale securities, total, fair value	52,674	[1]	40,935	[1]
Available-for-sale securities, total, weighted average maturity in years	'4 years 10 months 24 days		'6 years
Available-for-sale securities, total, weighted average yield	2.35%		2.64%
Held-to-maturity securities, total, amortized cost	44,231	[1]	38,920	[1]
Held-to-maturity securities, total, fair value	44,094		38,368
Held-to-maturity securities, total, weighted average maturity in years	'4 years 4 months 24 days		'4 years 6 months
Held-to-maturity securities, total, weighted average yield	1.93%		2.00%
Amortized Cost of Investment Securities	96,545		79,979
Amortized Cost of Investment Securities, Percentage	100.00%		100.00%
U.S. Treasury and agencies [Member]	'		'
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, maturing in one year or less, amortized cost	27		'
Available-for-sale securities, maturing after one year through five years, amortized cost	1,385		'
Available-for-sale securities, maturing after five years through ten years, amortized cost	1,179		'
Available-for-sale securities, maturing after ten years, amortized cost	101		'
Available-for-sale securities, total, amortized cost	2,692		1,108
Available-for-sale securities, maturing in one year or less, fair value	27		'
Available-for-sale securities, maturing after one year through five years, fair value	1,387		'
Available-for-sale securities, maturing after five years through ten years, fair value	1,163		'
Available-for-sale securities, maturing after ten years, fair value	101		'
Available-for-sale securities, total, fair value	2,678		1,045
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	'3 months 18 days		'
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	'3 years 8 months 12 days		'
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	'8 years 1 month 6 days		'
Available-for-sale securities, maturing after ten years, weighted average maturity in years	'18 years 6 months		'
Available-for-sale securities, total, weighted average maturity in years	'6 years 1 month 6 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	4.17%		'
Available for sale securities, maturing after one year through five years, weighted average yield	1.39%		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	2.83%		'
Available-for-sale securities, maturing after ten years, weighted average yield	1.38%		'
Available-for-sale securities, total, weighted average yield	2.05%		'
Held-to-maturity securities, maturing in one year or less, amortized cost	80		'
Held-to-maturity securities, maturing after one year through five years, amortized cost	1,096		'
Held-to-maturity securities, maturing after five years through ten years, amortized cost	1,445		'
Held-to-maturity securities, maturing after ten years, amortized cost	58		'
Held-to-maturity securities, total, amortized cost	2,679		3,114
Held-to-maturity securities, maturing in one year or less, fair value	81		'
Held to maturity securities, maturing after one year through five years, fair value	1,096		'
Held-to-maturity securities, maturing after five years through ten years, fair value	1,412		'
Held-to-maturity securities, maturing after ten years, fair value	58		'
Held-to-maturity securities, total, fair value	2,647		3,040
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	'8 months 12 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average maturity in years	'3 years 10 months 24 days		'
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	'7 years 9 months 18 days		'
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	'10 years 9 months 18 days		'
Held-to-maturity securities, total, weighted average maturity in years	'6 years 1 month 6 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	1.36%		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	1.42%		'
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	2.20%		'
Held-to-maturity securities, maturing after ten years, weighted average yield	1.73%		'
Held-to-maturity securities, total, weighted average yield	1.85%		'
Amortized Cost of Investment Securities	5,371		4,222
Amortized Cost of Investment Securities, Percentage	5.50%		5.30%
Mortgage-Backed Securities [Member]	'		'
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, maturing in one year or less, amortized cost	565		'
Available-for-sale securities, maturing after one year through five years, amortized cost	24,490		'
Available-for-sale securities, maturing after five years through ten years, amortized cost	16,133		'
Available-for-sale securities, maturing after ten years, amortized cost	1,355		'
Available-for-sale securities, total, amortized cost	42,543		'
Available-for-sale securities, maturing in one year or less, fair value	573		'
Available-for-sale securities, maturing after one year through five years, fair value	24,625		'
Available-for-sale securities, maturing after five years through ten years, fair value	16,121		'
Available-for-sale securities, maturing after ten years, fair value	1,350		'
Available-for-sale securities, total, fair value	42,669		'
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	'8 months 12 days		'
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	'3 years 9 months 18 days		'
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	'5 years 8 months 12 days		'
Available-for-sale securities, maturing after ten years, weighted average maturity in years	'12 years 6 months		'
Available-for-sale securities, total, weighted average maturity in years	'4 years 9 months 18 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	1.81%		'
Available for sale securities, maturing after one year through five years, weighted average yield	2.02%		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	1.62%		'
Available-for-sale securities, maturing after ten years, weighted average yield	1.21%		'
Available-for-sale securities, total, weighted average yield	1.84%		'
Held-to-maturity securities, maturing in one year or less, amortized cost	120		'
Held-to-maturity securities, maturing after one year through five years, amortized cost	28,283		'
Held-to-maturity securities, maturing after five years through ten years, amortized cost	12,674		'
Held-to-maturity securities, maturing after ten years, amortized cost	343		'
Held-to-maturity securities, total, amortized cost	41,420		'
Held-to-maturity securities, maturing in one year or less, fair value	120		'
Held to maturity securities, maturing after one year through five years, fair value	28,200		'
Held-to-maturity securities, maturing after five years through ten years, fair value	12,640		'
Held-to-maturity securities, maturing after ten years, fair value	346		'
Held-to-maturity securities, total, fair value	41,306		'
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	'9 months 18 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average maturity in years	'3 years 7 months 6 days		'
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	'5 years 7 months 6 days		'
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	'12 years 8 months 12 days		'
Held-to-maturity securities, total, weighted average maturity in years	'4 years 3 months 18 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	1.16%		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	2.12%		'
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	1.55%		'
Held-to-maturity securities, maturing after ten years, weighted average yield	1.17%		'
Held-to-maturity securities, total, weighted average yield	1.94%		'
Amortized Cost of Investment Securities	83,963		68,236
Amortized Cost of Investment Securities, Percentage	87.00%		85.30%
Asset-Backed Securities [Member]	'		'
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, maturing in one year or less, amortized cost	'		'
Available-for-sale securities, maturing after one year through five years, amortized cost	271		'
Available-for-sale securities, maturing after five years through ten years, amortized cost	357		'
Available-for-sale securities, maturing after ten years, amortized cost	'		'
Available-for-sale securities, total, amortized cost	628		'
Available-for-sale securities, maturing in one year or less, fair value	'		'
Available-for-sale securities, maturing after one year through five years, fair value	281		'
Available-for-sale securities, maturing after five years through ten years, fair value	364		'
Available-for-sale securities, maturing after ten years, fair value	'		'
Available-for-sale securities, total, fair value	645		'
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	'		'
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	'3 years 6 months		'
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	'7 years		'
Available-for-sale securities, maturing after ten years, weighted average maturity in years	'		'
Available-for-sale securities, total, weighted average maturity in years	'5 years 6 months		'
Available-for-sale securities, maturing in one year or less, weighted average yield	'		'
Available for sale securities, maturing after one year through five years, weighted average yield	2.32%		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	2.15%		'
Available-for-sale securities, maturing after ten years, weighted average yield	'		'
Available-for-sale securities, total, weighted average yield	2.23%		'
Held-to-maturity securities, maturing in one year or less, amortized cost	1		'
Held-to-maturity securities, maturing after one year through five years, amortized cost	6		'
Held-to-maturity securities, maturing after five years through ten years, amortized cost	7		'
Held-to-maturity securities, maturing after ten years, amortized cost	'		'
Held-to-maturity securities, total, amortized cost	14		'
Held-to-maturity securities, maturing in one year or less, fair value	1		'
Held to maturity securities, maturing after one year through five years, fair value	9		'
Held-to-maturity securities, maturing after five years through ten years, fair value	8		'
Held-to-maturity securities, maturing after ten years, fair value	7		'
Held-to-maturity securities, total, fair value	25		'
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	'8 months 12 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average maturity in years	'2 years 10 months 24 days		'
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	'6 years 3 months 18 days		'
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	'15 years 6 months		'
Held-to-maturity securities, total, weighted average maturity in years	'4 years 9 months 18 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	0.78%		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	0.89%		'
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	0.81%		'
Held-to-maturity securities, maturing after ten years, weighted average yield	0.88%		'
Held-to-maturity securities, total, weighted average yield	0.84%		'
Amortized Cost of Investment Securities	642		652
Amortized Cost of Investment Securities, Percentage	0.70%		0.80%
Obligations of state and political subdivisions [Member]	'		'
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, maturing in one year or less, amortized cost	724		'
Available-for-sale securities, maturing after one year through five years, amortized cost	4,121		'
Available-for-sale securities, maturing after five years through ten years, amortized cost	448		'
Available-for-sale securities, maturing after ten years, amortized cost	34		'
Available-for-sale securities, total, amortized cost	5,327		5,673
Available-for-sale securities, maturing in one year or less, fair value	742		'
Available-for-sale securities, maturing after one year through five years, fair value	4,334		'
Available-for-sale securities, maturing after five years through ten years, fair value	453		'
Available-for-sale securities, maturing after ten years, fair value	34		'
Available-for-sale securities, total, fair value	5,563		5,738
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	'7 months 6 days		'
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	'2 years 3 months 18 days		'
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	'6 years 10 months 24 days		'
Available-for-sale securities, maturing after ten years, weighted average maturity in years	'18 years		'
Available-for-sale securities, total, weighted average maturity in years	'2 years 6 months		'
Available-for-sale securities, maturing in one year or less, weighted average yield	6.66%		'
Available for sale securities, maturing after one year through five years, weighted average yield	6.79%		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	4.76%		'
Available-for-sale securities, maturing after ten years, weighted average yield	5.06%		'
Available-for-sale securities, total, weighted average yield	6.59%		'
Held-to-maturity securities, maturing in one year or less, amortized cost	'		'
Held-to-maturity securities, maturing after one year through five years, amortized cost	2		'
Held-to-maturity securities, maturing after five years through ten years, amortized cost	1		'
Held-to-maturity securities, maturing after ten years, amortized cost	7		'
Held-to-maturity securities, total, amortized cost	10		12
Held-to-maturity securities, maturing in one year or less, fair value	'		'
Held to maturity securities, maturing after one year through five years, fair value	2		'
Held-to-maturity securities, maturing after five years through ten years, fair value	1		'
Held-to-maturity securities, maturing after ten years, fair value	7		'
Held-to-maturity securities, total, fair value	10		12
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	'4 months 24 days		'
Held-to-maturity securities, maturing after one year through five years, weighted average maturity in years	'2 years 2 months 12 days		'
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	'7 years 4 months 24 days		'
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	'11 years 4 months 24 days		'
Held-to-maturity securities, total, weighted average maturity in years	'9 years		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	11.64%		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	8.31%		'
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	8.14%		'
Held-to-maturity securities, maturing after ten years, weighted average yield	2.51%		'
Held-to-maturity securities, total, weighted average yield	4.54%		'
Amortized Cost of Investment Securities	5,337		5,685
Amortized Cost of Investment Securities, Percentage	5.50%		7.10%
Other Debt Securities and Obligations of Foreign Governments [Member]	'		'
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, maturing in one year or less, amortized cost	6		'
Available-for-sale securities, maturing after one year through five years, amortized cost	'		'
Available-for-sale securities, maturing after five years through ten years, amortized cost	'		'
Available-for-sale securities, maturing after ten years, amortized cost	690		'
Available-for-sale securities, total, amortized cost	696		'
Available-for-sale securities, maturing in one year or less, fair value	6		'
Available-for-sale securities, maturing after one year through five years, fair value	'		'
Available-for-sale securities, maturing after five years through ten years, fair value	'		'
Available-for-sale securities, maturing after ten years, fair value	639		'
Available-for-sale securities, total, fair value	645		'
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	'4 months 24 days		'
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	'		'
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	'		'
Available-for-sale securities, maturing after ten years, weighted average maturity in years	'18 years 8 months 12 days		'
Available-for-sale securities, total, weighted average maturity in years	'18 years 7 months 6 days		'
Available-for-sale securities, maturing in one year or less, weighted average yield	1.01%		'
Available for sale securities, maturing after one year through five years, weighted average yield	'		'
Available-for-sale securities, maturing after five years through ten years, weighted average yield	'		'
Available-for-sale securities, maturing after ten years, weighted average yield	2.47%		'
Available-for-sale securities, total, weighted average yield	2.45%		'
Held-to-maturity securities, maturing in one year or less, amortized cost	2		'
Held-to-maturity securities, maturing after one year through five years, amortized cost	82		'
Held-to-maturity securities, maturing after five years through ten years, amortized cost	24		'
Held-to-maturity securities, maturing after ten years, amortized cost	'		'
Held-to-maturity securities, total, amortized cost	108		'
Held-to-maturity securities, maturing in one year or less, fair value	2		'
Held to maturity securities, maturing after one year through five years, fair value	82		'
Held-to-maturity securities, maturing after five years through ten years, fair value	22		'
Held-to-maturity securities, maturing after ten years, fair value	'		'
Held-to-maturity securities, total, fair value	106		'
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	'		'
Held-to-maturity securities, maturing after one year through five years, weighted average maturity in years	'1 year 2 months 12 days		'
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	'6 years 1 month 6 days		'
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	'		'
Held-to-maturity securities, total, weighted average maturity in years	'2 years 2 months 12 days		'
Held-to-maturity securities, maturing in one year or less, weighted average yield	1.78%		'
Held-to-maturity securities, maturing after one year through five years, weighted average yield	1.13%		'
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	0.97%		'
Held-to-maturity securities, maturing after ten years, weighted average yield	'		'
Held-to-maturity securities, total, weighted average yield	1.11%		'
Amortized Cost of Investment Securities	1,232		1,184
Amortized Cost of Investment Securities, Percentage	1.30%		1.50%
Other Investments Including Perpetual Preferred Securities [Member]	'		'
Contractual Maturities of Investment Securities [Line Items]	'		'
Available-for-sale securities, total, amortized cost	428		'
Available-for-sale securities, total, fair value	474		'
Available-for-sale securities, total, weighted average maturity in years	'14 years 4 months 24 days		'
Available-for-sale securities, total, weighted average yield	2.30%		'
Held-to-maturity securities, total, amortized cost	'		'
Held-to-maturity securities, total, fair value	'		'
Held-to-maturity securities, total, weighted average maturity in years	'		'
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)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Contractual Maturities of Investment Securities [Abstract]	'	'
Federal statutory rate	35.00%	'
Weighted-average maturity of available-for-sale investment securities	'4 years 10 months 24 days	'6 years
Weighted-average yield of available-for-sale investment securities	2.35%	2.64%
Weighted average maturity of held-to-maturity investment securities	'4 years 4 months 24 days	'4 years 6 months
Weighted-average yield of held-to-maturity investment securities	1.93%	2.00%

Basis_of_Presentation_Line_of_

Basis of Presentation - Line of Business Financial Performance (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Income Statement	'	'	'	'
Net interest income (taxable-equivalent basis)	$2,748	$2,714	$8,198	$8,095
Net interest income (taxable-equivalent basis), Percent change	1.30%	'	1.30%	'
Noninterest income	2,245	2,180	6,792	6,610
Noninterest income, Percent change	3.00%	'	2.80%	'
Securities gains (losses), net	-3	-3	2	8
Securities gains (losses), net, Percent change	'	'	-75.00%	'
Total net revenue	4,990	4,891	14,992	14,713
Total net revenue, Percent change	2.00%	'	1.90%	'
Noninterest expense, Percent change	2.10%	'	4.60%	'
Other intangibles, Percent change	-7.30%	'	-11.40%	'
Total noninterest expense, Percent change	1.90%	'	4.20%	'
Income before provision and income taxes, Percent change	2.10%	'	-0.60%	'
Provision for credit losses, Percent change	4.40%	'	-11.50%	'
Income before income taxes, Percent change	1.80%	'	1.40%	'
Income taxes and taxable-equivalent adjustment, Percent change	-3.20%	'	-3.60%	'
Net income, Percent change	3.90%	'	3.40%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'	'	'
Net income attributable to U.S. Bancorp, Percent change	0.20%	'	-0.40%	'
Noninterest expense	2,563	2,510	7,763	7,425
Other intangibles	51	55	148	167
Total noninterest expense	2,614	2,565	7,911	7,592
Income before provision and income taxes	2,376	2,326	7,081	7,121
Provision for credit losses	311	298	941	1,063
Income before income taxes	2,065	2,028	6,140	6,058
Income taxes and taxable-equivalent adjustment	579	598	1,733	1,797
Net income	1,486	1,430	4,407	4,261
Net (income) loss attributable to noncontrolling interests	-15	38	-44	119
Net income attributable to U.S. Bancorp	1,471	1,468	4,363	4,380
Average Balance Sheet	'	'	'	'
Commercial	77,345	68,064	74,424	66,719
Commercial, Percent change	13.60%	'	11.50%	'
Commercial real estate	40,839	38,501	40,465	37,872
Commercial real estate, Percent change	6.10%	'	6.80%	'
Residential mortgages	51,994	49,139	51,799	47,055
Residential mortgages, Percent change	5.80%	'	10.10%	'
Credit card	17,753	16,931	17,516	16,627
Credit card, Percent change	4.90%	'	5.30%	'
Other retail	48,698	46,994	48,098	47,034
Other retail, Percent change	3.60%	'	2.30%	'
Total loans, excluding covered loans	236,629	219,629	232,302	215,307
Total loans, excluding covered loans, Percent change	7.70%	'	7.90%	'
Covered loans	7,238	9,733	7,796	10,375
Covered loans, Percent change	-25.60%	'	-24.90%	'
Total loans	243,867	229,362	240,098	225,682
Total loans, Percent change	6.30%	'	6.40%	'
Goodwill, Percent change	2.80%	'	1.40%	'
Other intangible assets, Percent change	-2.20%	'	9.60%	'
Assets, Percent change	9.60%	'	6.80%	'
Noninterest-bearing deposits, Percent change	8.60%	'	7.60%	'
Interest checking, Percent change	12.90%	'	9.50%	'
Savings products, Percent change	14.50%	'	11.10%	'
Time deposits, Percent change	-13.10%	'	-8.50%	'
Total deposits, Percent change	7.40%	'	6.20%	'
Total U.S. Bancorp shareholders' equity, Percent change	8.00%	'	7.10%	'
Goodwill	9,417	9,161	9,284	9,157
Other intangible assets	3,323	3,399	3,376	3,079
Assets	385,823	352,161	375,047	351,048
Noninterest-bearing deposits	74,126	68,264	72,274	67,183
Interest checking	54,454	48,235	52,928	48,347
Savings products	100,865	88,065	96,254	86,635
Time deposits	41,563	47,804	42,206	46,119
Total deposits	271,008	252,368	263,662	248,284
Total U.S. Bancorp shareholders' equity	43,132	39,936	42,498	39,675
Wholesale Banking and Commercial Real Estate [Member]	'	'	'	'
Condensed Income Statement	'	'	'	'
Net interest income (taxable-equivalent basis)	518	506	1,521	1,501
Net interest income (taxable-equivalent basis), Percent change	2.40%	'	1.30%	'
Noninterest income	236	266	738	819
Noninterest income, Percent change	-11.30%	'	-9.90%	'
Securities gains (losses), net	'	'	'	'
Securities gains (losses), net, Percent change	'	'	'	'
Total net revenue	754	772	2,259	2,320
Total net revenue, Percent change	-2.30%	'	-2.60%	'
Noninterest expense, Percent change	0.70%	'	1.10%	'
Other intangibles, Percent change	-50.00%	'	-50.00%	'
Total noninterest expense, Percent change	0.30%	'	0.80%	'
Income before provision and income taxes, Percent change	-4.10%	'	-4.90%	'
Income before income taxes, Percent change	-17.50%	'	-13.80%	'
Income taxes and taxable-equivalent adjustment, Percent change	-17.30%	'	-13.80%	'
Net income, Percent change	-17.60%	'	-13.80%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'	'	'
Net income attributable to U.S. Bancorp, Percent change	-17.60%	'	-13.80%	'
Noninterest expense	304	302	930	920
Other intangibles	1	2	3	6
Total noninterest expense	305	304	933	926
Income before provision and income taxes	449	468	1,326	1,394
Provision for credit losses	29	-41	26	-114
Income before income taxes	420	509	1,300	1,508
Income taxes and taxable-equivalent adjustment	153	185	473	549
Net income	267	324	827	959
Net (income) loss attributable to noncontrolling interests	'	'	'	'
Net income attributable to U.S. Bancorp	267	324	827	959
Average Balance Sheet	'	'	'	'
Commercial	59,048	51,302	57,029	50,232
Commercial, Percent change	15.10%	'	13.50%	'
Commercial real estate	21,160	19,683	20,879	19,375
Commercial real estate, Percent change	7.50%	'	7.80%	'
Residential mortgages	19	24	20	27
Residential mortgages, Percent change	-20.80%	'	-25.90%	'
Credit card	'	'	'	'
Credit card, Percent change	'	'	'	'
Other retail	4	6	4	7
Other retail, Percent change	-33.30%	'	-42.90%	'
Total loans, excluding covered loans	80,231	71,015	77,932	69,641
Total loans, excluding covered loans, Percent change	13.00%	'	11.90%	'
Covered loans	174	340	205	394
Covered loans, Percent change	-48.80%	'	-48.00%	'
Total loans	80,405	71,355	78,137	70,035
Total loans, Percent change	12.70%	'	11.60%	'
Goodwill, Percent change	2.70%	'	1.10%	'
Other intangible assets, Percent change	-12.50%	'	-19.20%	'
Assets, Percent change	12.50%	'	11.40%	'
Noninterest-bearing deposits, Percent change	6.10%	'	5.70%	'
Interest checking, Percent change	12.40%	'	6.40%	'
Savings products, Percent change	26.60%	'	34.60%	'
Time deposits, Percent change	-19.70%	'	-1.30%	'
Total deposits, Percent change	3.50%	'	9.30%	'
Total U.S. Bancorp shareholders' equity, Percent change	5.40%	'	5.30%	'
Goodwill	1,648	1,604	1,621	1,604
Other intangible assets	21	24	21	26
Assets	87,449	77,708	85,198	76,455
Noninterest-bearing deposits	32,684	30,812	32,029	30,299
Interest checking	11,270	10,031	11,042	10,378
Savings products	19,082	15,067	17,929	13,320
Time deposits	17,961	22,362	18,217	18,450
Total deposits	80,997	78,272	79,217	72,447
Total U.S. Bancorp shareholders' equity	7,764	7,366	7,653	7,269
Consumer and Small Business Banking [Member]	'	'	'	'
Condensed Income Statement	'	'	'	'
Net interest income (taxable-equivalent basis)	1,074	1,153	3,241	3,459
Net interest income (taxable-equivalent basis), Percent change	-6.90%	'	-6.30%	'
Noninterest income	669	717	1,967	2,268
Noninterest income, Percent change	-6.70%	'	-13.30%	'
Securities gains (losses), net	'	'	'	'
Securities gains (losses), net, Percent change	'	'	'	'
Total net revenue	1,743	1,870	5,208	5,727
Total net revenue, Percent change	-6.80%	'	-9.10%	'
Noninterest expense, Percent change	5.30%	'	1.30%	'
Other intangibles, Percent change	20.00%	'	-6.50%	'
Total noninterest expense, Percent change	5.40%	'	1.20%	'
Income before provision and income taxes, Percent change	-25.10%	'	-24.20%	'
Provision for credit losses, Percent change	-51.50%	'	-42.10%	'
Income before income taxes, Percent change	-17.70%	'	-18.30%	'
Income taxes and taxable-equivalent adjustment, Percent change	-17.80%	'	-18.40%	'
Net income, Percent change	-17.70%	'	-18.30%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'	'	'
Net income attributable to U.S. Bancorp, Percent change	-17.70%	'	-18.30%	'
Noninterest expense	1,169	1,110	3,421	3,377
Other intangibles	12	10	29	31
Total noninterest expense	1,181	1,120	3,450	3,408
Income before provision and income taxes	562	750	1,758	2,319
Provision for credit losses	79	163	332	573
Income before income taxes	483	587	1,426	1,746
Income taxes and taxable-equivalent adjustment	176	214	519	636
Net income	307	373	907	1,110
Net (income) loss attributable to noncontrolling interests	'	'	'	'
Net income attributable to U.S. Bancorp	307	373	907	1,110
Average Balance Sheet	'	'	'	'
Commercial	9,439	8,584	8,903	8,567
Commercial, Percent change	10.00%	'	3.90%	'
Commercial real estate	18,899	18,069	18,771	17,741
Commercial real estate, Percent change	4.60%	'	5.80%	'
Residential mortgages	50,544	48,130	50,443	46,251
Residential mortgages, Percent change	5.00%	'	9.10%	'
Credit card	'	'	'	'
Credit card, Percent change	'	'	'	'
Other retail	46,594	44,727	45,964	44,739
Other retail, Percent change	4.20%	'	2.70%	'
Total loans, excluding covered loans	125,476	119,510	124,081	117,298
Total loans, excluding covered loans, Percent change	5.00%	'	5.80%	'
Covered loans	5,688	6,434	5,871	6,690
Covered loans, Percent change	-11.60%	'	-12.20%	'
Total loans	131,164	125,944	129,952	123,988
Total loans, Percent change	4.10%	'	4.80%	'
Goodwill, Percent change	4.70%	'	1.70%	'
Other intangible assets, Percent change	0.50%	'	17.70%	'
Assets, Percent change	3.50%	'	2.30%	'
Noninterest-bearing deposits, Percent change	9.30%	'	5.70%	'
Interest checking, Percent change	11.70%	'	9.10%	'
Savings products, Percent change	10.10%	'	7.40%	'
Time deposits, Percent change	-14.00%	'	-16.30%	'
Total deposits, Percent change	6.30%	'	3.40%	'
Total U.S. Bancorp shareholders' equity, Percent change	-5.90%	'	-5.30%	'
Goodwill	3,680	3,515	3,577	3,516
Other intangible assets	2,664	2,650	2,698	2,293
Assets	145,604	140,621	143,337	140,056
Noninterest-bearing deposits	24,696	22,585	23,218	21,976
Interest checking	36,881	33,007	35,832	32,841
Savings products	51,229	46,532	49,496	46,106
Time deposits	17,816	20,718	18,080	21,591
Total deposits	130,622	122,842	126,626	122,514
Total U.S. Bancorp shareholders' equity	11,504	12,222	11,480	12,125
Wealth Management and Securities Services [Member]	'	'	'	'
Condensed Income Statement	'	'	'	'
Net interest income (taxable-equivalent basis)	96	82	270	257
Net interest income (taxable-equivalent basis), Percent change	17.10%	'	5.10%	'
Noninterest income	352	314	1,038	935
Noninterest income, Percent change	12.10%	'	11.00%	'
Securities gains (losses), net	'	'	'	'
Securities gains (losses), net, Percent change	'	'	'	'
Total net revenue	448	396	1,308	1,192
Total net revenue, Percent change	13.10%	'	9.70%	'
Noninterest expense, Percent change	3.40%	'	3.50%	'
Other intangibles, Percent change	-11.10%	'	-7.40%	'
Total noninterest expense, Percent change	3.00%	'	3.20%	'
Income before provision and income taxes, Percent change	66.70%	'	42.60%	'
Provision for credit losses, Percent change	'	'	14.30%	'
Income before income taxes, Percent change	73.70%	'	43.70%	'
Income taxes and taxable-equivalent adjustment, Percent change	71.40%	'	44.90%	'
Net income, Percent change	75.00%	'	43.00%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'	'	'
Net income attributable to U.S. Bancorp, Percent change	75.00%	'	43.00%	'
Noninterest expense	335	324	1,002	968
Other intangibles	8	9	25	27
Total noninterest expense	343	333	1,027	995
Income before provision and income taxes	105	63	281	197
Provision for credit losses	6	6	8	7
Income before income taxes	99	57	273	190
Income taxes and taxable-equivalent adjustment	36	21	100	69
Net income	63	36	173	121
Net (income) loss attributable to noncontrolling interests	'	'	'	'
Net income attributable to U.S. Bancorp	63	36	173	121
Average Balance Sheet	'	'	'	'
Commercial	1,968	1,772	1,910	1,686
Commercial, Percent change	11.10%	'	13.30%	'
Commercial real estate	601	655	608	656
Commercial real estate, Percent change	-8.20%	'	-7.30%	'
Residential mortgages	1,430	984	1,335	776
Residential mortgages, Percent change	45.30%	'	72.00%	'
Credit card	'	'	'	'
Credit card, Percent change	'	'	'	'
Other retail	1,436	1,532	1,450	1,544
Other retail, Percent change	-6.30%	'	-6.10%	'
Total loans, excluding covered loans	5,435	4,943	5,303	4,662
Total loans, excluding covered loans, Percent change	10.00%	'	13.70%	'
Covered loans	3	17	5	14
Covered loans, Percent change	-82.40%	'	-64.30%	'
Total loans	5,438	4,960	5,308	4,676
Total loans, Percent change	9.60%	'	13.50%	'
Goodwill, Percent change	2.50%	'	2.60%	'
Other intangible assets, Percent change	-6.60%	'	-6.30%	'
Assets, Percent change	12.00%	'	11.90%	'
Noninterest-bearing deposits, Percent change	10.40%	'	9.50%	'
Interest checking, Percent change	20.80%	'	17.30%	'
Savings products, Percent change	15.40%	'	5.80%	'
Time deposits, Percent change	-5.80%	'	-21.50%	'
Total deposits, Percent change	12.70%	'	5.10%	'
Total U.S. Bancorp shareholders' equity, Percent change	-5.50%	'	-3.90%	'
Goodwill	1,572	1,533	1,568	1,529
Other intangible assets	155	166	163	174
Assets	8,679	7,751	8,409	7,514
Noninterest-bearing deposits	14,900	13,500	15,095	13,786
Interest checking	5,729	4,741	5,494	4,683
Savings products	30,373	26,326	28,650	27,070
Time deposits	3,939	4,182	4,111	5,237
Total deposits	54,941	48,749	53,350	50,776
Total U.S. Bancorp shareholders' equity	2,267	2,398	2,283	2,375
Payment Services [Member]	'	'	'	'
Condensed Income Statement	'	'	'	'
Net interest income (taxable-equivalent basis)	442	393	1,271	1,168
Net interest income (taxable-equivalent basis), Percent change	12.50%	'	8.80%	'
Noninterest income	842	822	2,449	2,397
Noninterest income, Percent change	2.40%	'	2.20%	'
Securities gains (losses), net	'	'	'	'
Securities gains (losses), net, Percent change	'	'	'	'
Total net revenue	1,284	1,215	3,720	3,565
Total net revenue, Percent change	5.70%	'	4.30%	'
Noninterest expense, Percent change	1.20%	'	2.80%	'
Other intangibles, Percent change	-11.80%	'	-11.70%	'
Total noninterest expense, Percent change	0.50%	'	1.90%	'
Income before provision and income taxes, Percent change	10.90%	'	6.80%	'
Provision for credit losses, Percent change	10.50%	'	3.60%	'
Income before income taxes, Percent change	11.10%	'	8.20%	'
Income taxes and taxable-equivalent adjustment, Percent change	10.80%	'	8.10%	'
Net income, Percent change	11.20%	'	8.30%	'
Net (income) loss attributable to noncontrolling interests, Percent change	10.00%	'	6.90%	'
Net income attributable to U.S. Bancorp, Percent change	12.00%	'	8.90%	'
Noninterest expense	582	575	1,742	1,695
Other intangibles	30	34	91	103
Total noninterest expense	612	609	1,833	1,798
Income before provision and income taxes	672	606	1,887	1,767
Provision for credit losses	190	172	573	553
Income before income taxes	482	434	1,314	1,214
Income taxes and taxable-equivalent adjustment	175	158	478	442
Net income	307	276	836	772
Net (income) loss attributable to noncontrolling interests	-9	-10	-27	-29
Net income attributable to U.S. Bancorp	298	266	809	743
Average Balance Sheet	'	'	'	'
Commercial	6,681	6,191	6,402	6,030
Commercial, Percent change	7.90%	'	6.20%	'
Commercial real estate	'	'	'	'
Commercial real estate, Percent change	'	'	'	'
Residential mortgages	'	'	'	'
Residential mortgages, Percent change	'	'	'	'
Credit card	17,753	16,931	17,516	16,627
Credit card, Percent change	4.90%	'	5.30%	'
Other retail	664	729	680	744
Other retail, Percent change	-8.90%	'	-8.60%	'
Total loans, excluding covered loans	25,098	23,851	24,598	23,401
Total loans, excluding covered loans, Percent change	5.20%	'	5.10%	'
Covered loans	5	5	5	5
Covered loans, Percent change	'	'	'	'
Total loans	25,103	23,856	24,603	23,406
Total loans, Percent change	5.20%	'	5.10%	'
Goodwill, Percent change	0.30%	'	0.40%	'
Other intangible assets, Percent change	-13.30%	'	-15.40%	'
Assets, Percent change	4.30%	'	4.20%	'
Noninterest-bearing deposits, Percent change	-1.70%	'	1.40%	'
Interest checking, Percent change	25.90%	'	25.90%	'
Savings products, Percent change	35.00%	'	40.70%	'
Time deposits, Percent change	'	'	'	'
Total deposits, Percent change	10.30%	'	12.30%	'
Total U.S. Bancorp shareholders' equity, Percent change	-6.80%	'	-5.90%	'
Goodwill	2,517	2,509	2,518	2,508
Other intangible assets	483	557	494	584
Assets	31,407	30,123	30,901	29,659
Noninterest-bearing deposits	702	714	704	694
Interest checking	573	455	559	444
Savings products	81	60	76	54
Time deposits	'	'	'	'
Total deposits	1,356	1,229	1,339	1,192
Total U.S. Bancorp shareholders' equity	5,690	6,102	5,675	6,033
Treasury and Corporate Support [Member]	'	'	'	'
Condensed Income Statement	'	'	'	'
Net interest income (taxable-equivalent basis)	618	580	1,895	1,710
Net interest income (taxable-equivalent basis), Percent change	6.60%	'	10.80%	'
Noninterest income	146	61	600	191
Securities gains (losses), net	-3	-3	2	8
Securities gains (losses), net, Percent change	'	'	-75.00%	'
Total net revenue	761	638	2,497	1,909
Total net revenue, Percent change	19.30%	'	30.80%	'
Noninterest expense, Percent change	-13.10%	'	43.70%	'
Other intangibles, Percent change	'	'	'	'
Total noninterest expense, Percent change	-13.10%	'	43.70%	'
Income before provision and income taxes, Percent change	33.90%	'	26.70%	'
Provision for credit losses, Percent change	'	'	-95.50%	'
Income before income taxes, Percent change	31.70%	'	30.50%	'
Income taxes and taxable-equivalent adjustment, Percent change	95.00%	'	61.40%	'
Net income, Percent change	28.70%	'	28.10%	'
Net (income) loss attributable to noncontrolling interests, Percent change	'	'	'	'
Net income attributable to U.S. Bancorp, Percent change	14.30%	'	13.80%	'
Noninterest expense	173	199	668	465
Other intangibles	'	'	'	'
Total noninterest expense	173	199	668	465
Income before provision and income taxes	588	439	1,829	1,444
Provision for credit losses	7	-2	2	44
Income before income taxes	581	441	1,827	1,400
Income taxes and taxable-equivalent adjustment	39	20	163	101
Net income	542	421	1,664	1,299
Net (income) loss attributable to noncontrolling interests	-6	48	-17	148
Net income attributable to U.S. Bancorp	536	469	1,647	1,447
Average Balance Sheet	'	'	'	'
Commercial	209	215	180	204
Commercial, Percent change	-2.80%	'	-11.80%	'
Commercial real estate	179	94	207	100
Commercial real estate, Percent change	90.40%	'	'	'
Residential mortgages	1	1	1	1
Residential mortgages, Percent change	'	'	'	'
Credit card	'	'	'	'
Credit card, Percent change	'	'	'	'
Other retail	'	'	'	'
Other retail, Percent change	'	'	'	'
Total loans, excluding covered loans	389	310	388	305
Total loans, excluding covered loans, Percent change	25.50%	'	27.20%	'
Covered loans	1,368	2,937	1,710	3,272
Covered loans, Percent change	-53.40%	'	-47.70%	'
Total loans	1,757	3,247	2,098	3,577
Total loans, Percent change	-45.90%	'	-41.30%	'
Goodwill, Percent change	'	'	'	'
Assets, Percent change	17.40%	'	10.10%	'
Noninterest-bearing deposits, Percent change	75.20%	'	'	'
Interest checking, Percent change	'	'	'	'
Savings products, Percent change	25.00%	'	21.20%	'
Total U.S. Bancorp shareholders' equity, Percent change	34.30%	'	29.80%	'
Goodwill	'	'	'	'
Other intangible assets	'	2	'	2
Assets	112,684	95,958	107,202	97,364
Noninterest-bearing deposits	1,144	653	1,228	428
Interest checking	1	1	1	1
Savings products	100	80	103	85
Time deposits	1,847	542	1,798	841
Total deposits	3,092	1,276	3,130	1,355
Total U.S. Bancorp shareholders' equity	$15,907	$11,848	$15,407	$11,873

Business_Combinations_Addition

Business Combinations - Additional Information (Detail) (USD $)	Jun. 30, 2014
Business Combinations [Abstract]	'
Loans acquired in the Charter One acquisition	$969,000,000
Deposits acquired in the Charter One acquisition	$4,800,000,000

Investment_Securities_Investme2

Investment Securities - Investment Securities Held to Maturity (Detail) (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	$44,231	[1]	$38,920	[1]
Held-to-maturity securities, Unrealized Gains	264		205
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	-1		-1
Held-to-maturity securities, Unrealized Losses Other	-400		-756
Held-to-maturity securities, fair value	44,094		38,368
U.S. Treasury and agencies [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	2,679		3,114
Held-to-maturity securities, Unrealized Gains	8		5
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	-40		-79
Held-to-maturity securities, fair value	2,647		3,040
Mortgage-backed securities Residential [Member] | Agency [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	41,419		35,671
Held-to-maturity securities, Unrealized Gains	244		187
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	-358		-665
Held-to-maturity securities, fair value	41,305		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
Asset-Backed Securities [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	14		'
Held-to-maturity securities, fair value	25		'
Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	'		'
Held-to-maturity securities, Unrealized Gains	8		9
Held-to-maturity securities, Unrealized Losses Other-than-Temporary	'		'
Held-to-maturity securities, Unrealized Losses Other	'		'
Held-to-maturity securities, fair value	8		9
Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'
Schedule of Held-to-maturity Securities [Line Items]	'		'
Held-to-maturity securities, Amortized Cost	14		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
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	10		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	10		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	-2		-11
Held-to-maturity securities, fair value	$97		$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 $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	$52,314		$41,059
Available-for-sale securities, Unrealized Gains	873		651
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-5		-13
Available-for-sale securities, Unrealized Losses Other	-508		-762
Available-for-sale securities, Fair Value	52,674	[1]	40,935	[1]
U.S. Treasury and agencies [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	2,692		1,108
Available-for-sale securities, Unrealized Gains	7		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-21		-67
Available-for-sale securities, Fair Value	2,678		1,045
Mortgage-backed securities Residential [Member] | Agency [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	41,734		31,633
Available-for-sale securities, Unrealized Gains	524		449
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-421		-529
Available-for-sale securities, Fair Value	41,837		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	420		486
Available-for-sale securities, Unrealized Gains	11		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-4		-8
Available-for-sale securities, Unrealized Losses Other	-1		-4
Available-for-sale securities, Fair Value	426		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	270		297
Available-for-sale securities, Unrealized Gains	15		5
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-1		-5
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	284		297
Commercial [Member] | Agency [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	119		148
Available-for-sale securities, Unrealized Gains	3		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	'		'
Available-for-sale securities, Fair Value	122		152
Asset-Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	628		'
Available-for-sale securities, Fair Value	645		'
Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	19		20
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	23		24
Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	609		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	622		629
Obligations of state and political subdivisions [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	5,327		5,673
Available-for-sale securities, Unrealized Gains	239		116
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-3		-51
Available-for-sale securities, Fair Value	5,563		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	690		734
Available-for-sale securities, Unrealized Gains	3		'
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-54		-94
Available-for-sale securities, Fair Value	639		640
Perpetual preferred securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	201		205
Available-for-sale securities, Unrealized Gains	27		24
Available-for-sale securities, Unrealized Losses Other-than-Temporary	'		'
Available-for-sale securities, Unrealized Losses Other	-8		-17
Available-for-sale securities, Fair Value	220		212
Other Investment [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities, Amortized Cost	227		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	$254		$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)	Sep. 30, 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 $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'	'
Weighted-average maturity of available-for-sale investment securities	'4 years 10 months 24 days	'6 years
Weighted-average yields of available-for-sale investment securities	2.35%	2.64%
Weighted average maturity of held-to-maturity investment securities	'4 years 4 months 24 days	'4 years 6 months
Weighted-average yields of held-to-maturity investment securities	1.93%	2.00%
Fair value of securities pledged	$12,900,000,000	$17,300,000,000
Fair value of securities pledged as collateral where counterparty has right to repledge or resell	$640,000,000	$2,100,000,000

Investment_Securities_Amount_o

Investment Securities - Amount of Interest Income from Taxable and Non-Taxable Investment Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest Income, Securities, Operating, by Taxable Status [Abstract]	'	'	'	'
Taxable	$419	$357	$1,203	$1,029
Non-taxable	57	63	175	193
Total interest income from investment securities	$476	$420	$1,378	$1,222

Investment_Securities_Amount_o1

Investment Securities - Amount of Gross Gains and Losses Realized through Sales of Available-for-sale Investment Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments [Abstract]	'	'	'	'
Realized gains	'	'	$8	$21
Realized losses	0	'	'	'
Net realized gains (losses)	'	'	8	21
Income tax (benefit) on net realized gains (losses)	'	'	$3	$8

Investment_Securities_Summary_

Investment Securities - Summary of Other-than-Temporary Impairment by Investment Category (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'
Other Gains (Losses)	'	$1	$1	$8
Available-for-Sale Securities [Member]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'
Losses Recorded in Earnings	-3	-3	-6	-13
Other Gains (Losses)	'	1	1	8
Total Available for sale other-than-temporary impairment	-3	-2	-5	-5
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	-1	-5
Other Gains (Losses)	'	'	1	2
Total Available for sale other-than-temporary impairment	'	-1	'	-3
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	'	-2	-2	-8
Other Gains (Losses)	'	1	'	6
Total Available for sale other-than-temporary impairment	'	-1	-2	-2
Available-for-Sale Securities [Member] | Perpetual preferred securities [Member]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'
Losses Recorded in Earnings	-3	'	-3	'
Other Gains (Losses)	'	'	'	'
Total Available for sale other-than-temporary impairment	($3)	'	($3)	'

Investment_Securities_Signific

Investment Securities - Significant Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Determined to be Other-Than-Temporarily Impaired (Detail) (Available-for-Sale Securities [Member], Mortgage-backed securities Residential [Member], Non-agency Non-prime [Member])	3 Months Ended
	Sep. 30, 2014
Minimum [Member]	'
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]	'
Estimated lifetime prepayment rates	8.00%
Lifetime probability of default rates	6.00%
Lifetime loss severity rates	40.00%
Maximum [Member]	'
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]	'
Estimated lifetime prepayment rates	10.00%
Lifetime probability of default rates	8.00%
Lifetime loss severity rates	55.00%
Average [Member]	'
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]	'
Estimated lifetime prepayment rates	8.00%
Lifetime probability of default rates	8.00%
Lifetime loss severity rates	42.00%

Investment_Securities_Changes_

Investment Securities - Changes in Credit Losses on Debt Securities Excluding Perpetual Preferred Securities (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Credit Losses on Debt Securities [RollForward]	'	'	'	'
Balance at beginning of period	$111	$124	$116	$134
Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized	'	3	3	13
Total other-than-temporary impairment on debt securities	'	3	3	13
Increases in expected cash flows	-2	-1	-4	-2
Realized losses	-4	-4	-10	-18
Credit losses on security sales and securities expected to be sold	'	'	'	-5
Balance at end of period	$105	$122	$105	$122

Investment_Securities_Gross_Un

Investment Securities - Gross Unrealized Losses and Fair Value of Company's Investment Securities (Detail) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	$12,046
Unrealized Losses Less Than 12 Months	-78
Fair Value 12 Months or Greater	10,603
Unrealized Losses 12 Months or Greater	-323
Fair Value Total	22,649
Unrealized Losses Total	-401
Fair Value Less Than 12 Months	10,812
Unrealized Losses Less Than 12 Months	-93
Fair Value 12 Months or Greater	10,048
Unrealized Losses 12 Months or Greater	-420
Fair Value Total	20,860
Unrealized Losses Total	-513
U.S. Treasury and agencies [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	577
Unrealized Losses Less Than 12 Months	-2
Fair Value 12 Months or Greater	968
Unrealized Losses 12 Months or Greater	-38
Fair Value Total	1,545
Unrealized Losses Total	-40
Fair Value Less Than 12 Months	1,173
Unrealized Losses Less Than 12 Months	-1
Fair Value 12 Months or Greater	825
Unrealized Losses 12 Months or Greater	-20
Fair Value Total	1,998
Unrealized Losses Total	-21
Mortgage-backed securities Residential [Member] | Agency [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	11,469
Unrealized Losses Less Than 12 Months	-76
Fair Value 12 Months or Greater	9,607
Unrealized Losses 12 Months or Greater	-282
Fair Value Total	21,076
Unrealized Losses Total	-358
Fair Value Less Than 12 Months	9,519
Unrealized Losses Less Than 12 Months	-91
Fair Value 12 Months or Greater	8,317
Unrealized Losses 12 Months or Greater	-330
Fair Value Total	17,836
Unrealized Losses Total	-421
Mortgage-backed securities Residential [Member] | Non-agency Prime [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	40
Unrealized Losses Less Than 12 Months	-1
Fair Value 12 Months or Greater	114
Unrealized Losses 12 Months or Greater	-4
Fair Value Total	154
Unrealized Losses Total	-5
Mortgage-backed securities Residential [Member] | Non-agency Non-prime [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	12
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	22
Unrealized Losses 12 Months or Greater	-1
Fair Value Total	34
Unrealized Losses Total	-1
Asset-Backed Securities [Member] | Asset-backed securities Other [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	'
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	6
Unrealized Losses 12 Months or Greater	-1
Fair Value Total	6
Unrealized Losses Total	-1
Fair Value Less Than 12 Months	2
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	24
Unrealized Losses 12 Months or Greater	'
Fair Value Total	26
Unrealized Losses Total	'
Other debt securities [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	'
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	22
Unrealized Losses 12 Months or Greater	-2
Fair Value Total	22
Unrealized Losses Total	-2
Obligations of state and political subdivisions [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	15
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	217
Unrealized Losses 12 Months or Greater	-3
Fair Value Total	232
Unrealized Losses Total	-3
Obligations of foreign governments [Member]	'
Continuous Gross Unrealized Losses And Fair Value [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]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	'
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	453
Unrealized Losses 12 Months or Greater	-54
Fair Value Total	453
Unrealized Losses Total	-54
Perpetual preferred securities [Member]	'
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Fair Value Less Than 12 Months	45
Unrealized Losses Less Than 12 Months	'
Fair Value 12 Months or Greater	76
Unrealized Losses 12 Months or Greater	-8
Fair Value Total	121
Unrealized Losses Total	($8)

Investment_Securities_Gross_Un1

Investment Securities - Gross Unrealized Losses and Fair Value of Company's Investment Securities (Parenthetical) (Detail) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Continuous Gross Unrealized Losses And Fair Value [Abstract]	'
Residential Non-Agency Mortgage-Backed Securities Unrealized Losses	$6

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses - Composition of Loan Portfolio (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	$238,537	$226,773
Total loans	245,591	235,235
Total loans, Percentage	100.00%	100.00%
Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	73,600	64,762
Loans, excluding covered loans, percentage	30.00%	27.50%
Lease Financing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	5,278	5,271
Loans, excluding covered loans, percentage	2.10%	2.30%
Commercial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	78,878	70,033
Loans, excluding covered loans, percentage	32.10%	29.80%
Commercial Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	31,802	32,183
Loans, excluding covered loans, percentage	13.00%	13.70%
Construction and Development [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	9,107	7,702
Loans, excluding covered loans, percentage	3.70%	3.30%
Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	40,909	39,885
Loans, excluding covered loans, percentage	16.70%	17.00%
Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	38,858	37,545
Loans, excluding covered loans, percentage	15.80%	15.90%
Home Equity Loans, First Liens [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	13,099	13,611
Loans, excluding covered loans, percentage	5.30%	5.80%
Residential Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	51,957	51,156
Loans, excluding covered loans, percentage	21.10%	21.70%
Credit Card [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	17,858	18,021
Loans, excluding covered loans, percentage	7.30%	7.70%
Retail Leasing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	5,999	5,929
Loans, excluding covered loans, percentage	2.50%	2.50%
Home Equity And Second Mortgages [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	15,769	15,442
Loans, excluding covered loans, percentage	6.40%	6.60%
Revolving Credit [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	3,242	3,276
Loans, excluding covered loans, percentage	1.30%	1.40%
Installment [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	6,173	5,709
Loans, excluding covered loans, percentage	2.50%	2.40%
Automobile [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	14,517	13,743
Loans, excluding covered loans, percentage	5.90%	5.80%
Student [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	3,235	3,579
Loans, excluding covered loans, percentage	1.30%	1.50%
Other Retail [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	48,935	47,678
Loans, excluding covered loans, percentage	19.90%	20.20%
Total Loans, Excluding Covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans, excluding covered loans	238,537	226,773
Loans, excluding covered loans, percentage	97.10%	96.40%
Covered Loans [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Total loans	$7,054	$8,462
Total loans, Percentage	2.90%	3.60%

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
	MortgageLoan	MortgageLoan
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Loans pledged at the Federal Home Loan Bank ("FHLB")	$79,400,000,000	$79,400,000,000	'	$77,200,000,000
Loans pledged at the Federal Reserve Bank	61,800,000,000	61,800,000,000	'	53,000,000,000
Unearned interest and deferred fees and costs on loans	575,000,000	575,000,000	'	556,000,000
Contractually required payments receivable for all purchased nonimpaired loans acquired in the Charter One acquisition	'	'	1,500,000,000	'
Contractual cash flows not expected to be collected in the Charter One acquisition	'	'	247,000,000	'
Fair value of loans acquired in the Charter One acquisition	'	'	969,000,000	'
Purchased impaired loans acquired in the Charter One acquisition	'	'	0	'
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	273,000,000	273,000,000	'	'
Foreclosed residential real estate property included in other real estate owned excluding covered assets	236,000,000	236,000,000	'	'
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	623,000,000	623,000,000	'	'
Residential mortgage loans secured by residential real estate in process of foreclosure	3,000,000,000	3,000,000,000	'	'
Maximum restructuring period under credit card and other retail loan financial difficulty modifications	'	'60 months	'	'
Number of residential mortgage loans, home equity and second mortgage loans, and GNMA loans where trial period arrangement was unsuccessful and no longer eligible for a permanent modification	435	1,313	'	'
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	57,000,000	159,000,000	'	'
Remaining term for single family residential mortgages covered under loss sharing agreements	'	'5 years	'	'
Purchased impaired loans included in covered loans classified as nonperforming assets	5,000,000	5,000,000	'	5,000,000
Commercial Lending Segment [Member] | Maximum [Member]	'	'	'	'
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Period of loss experience	'	'13 years	'	'
Commercial Lending Segment [Member] | Minimum [Member]	'	'	'	'
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Impairment loan threshold for allowance in which loans are individually analyzed	5,000,000	5,000,000	'	'
Junior Lien [Member]	'	'	'	'
Loans and Allowance for Credit Losses [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]	'	'	'	'
Loans and Allowance for Credit Losses [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]	'	'	'	'
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Residential mortgage loans secured by residential real estate in process of foreclosure 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	2,100,000,000	2,100,000,000	'	'
Residential Mortgages [Member]	'	'	'	'
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Number of loans in trial period	310	310	'	'
Outstanding balance of loans in trial period	40,000,000	40,000,000	'	'
Estimated post-modification balance of loans in trial period	41,000,000	41,000,000	'	'
Home equity and second mortgage loans [Member]	'	'	'	'
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Number of loans in trial period	49	49	'	'
Outstanding balance of loans in trial period	3,000,000	3,000,000	'	'
Estimated post-modification balance of loans in trial period	3,000,000	3,000,000	'	'
Loans Purchased from GNMA Mortgage Pools [Member]	'	'	'	'
Loans and Allowance for Credit Losses [Line Items]	'	'	'	'
Number of loans in trial period	1,764	1,764	'	'
Outstanding balance of loans in trial period	231,000,000	231,000,000	'	'
Estimated post-modification balance of loans in trial period	$232,000,000	$232,000,000	'	'

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses - Changes in Accretable Balance for Purchased Impaired Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Deteriorated Loans Transferred in [Abstract]	'	'	'	'
Balance at beginning of period	$1,487	$1,802	$1,655	$1,709
Accretion	-105	-119	-336	-380
Disposals	-34	-51	-103	-120
Reclassifications from nonaccretable difference	38	119	172	177
Other	'	'	-2	365
Balance at end of period	$1,386	$1,751	$1,386	$1,751

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses - Activity in Allowance for Credit Losses by Portfolio Type (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	$4,449	$4,612	$4,537	$4,733
Provision for credit losses	311	298	941	1,063
Loans charged off	410	450	1,264	1,505
Less recoveries of loans charged off	-74	-122	-238	-352
Net loans charged off	336	328	1,026	1,153
Other changes	-10	-4	-38	-65
Balance at end of period	4,414	4,578	4,414	4,578
Commercial [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	1,111	1,023	1,075	1,051
Provision for credit losses	83	19	210	64
Loans charged off	80	65	219	184
Less recoveries of loans charged off	-22	-54	-70	-100
Net loans charged off	58	11	149	84
Other changes	'	'	'	'
Balance at end of period	1,136	1,031	1,136	1,031
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	725	777	776	857
Provision for credit losses	-6	-22	-64	-100
Loans charged off	10	17	27	76
Less recoveries of loans charged off	-6	-23	-30	-80
Net loans charged off	4	-6	-3	-4
Other changes	'	'	'	'
Balance at end of period	715	761	715	761
Residential Mortgages [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	848	921	875	935
Provision for credit losses	-13	70	74	222
Loans charged off	48	62	171	243
Less recoveries of loans charged off	-6	-5	-15	-20
Net loans charged off	42	57	156	223
Other changes	'	'	'	'
Balance at end of period	793	934	793	934
Credit Card [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	874	874	884	863
Provision for credit losses	162	151	495	495
Loans charged off	174	175	546	559
Less recoveries of loans charged off	-16	-15	-48	-66
Net loans charged off	158	160	498	493
Other changes	'	'	-3	'
Balance at end of period	878	865	878	865
Other Retail [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	779	838	781	848
Provision for credit losses	84	84	227	305
Loans charged off	96	122	291	412
Less recoveries of loans charged off	-23	-24	-73	-83
Net loans charged off	73	98	218	329
Other changes	'	'	'	'
Balance at end of period	790	824	790	824
Total Loans, Excluding Covered Loans [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	4,337	4,433	4,391	4,554
Provision for credit losses	310	302	942	986
Loans charged off	408	441	1,254	1,474
Less recoveries of loans charged off	-73	-121	-236	-349
Net loans charged off	335	320	1,018	1,125
Other changes	'	'	-3	'
Balance at end of period	4,312	4,415	4,312	4,415
Covered Loans [Member]	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'
Balance at beginning of period	112	179	146	179
Provision for credit losses	1	-4	-1	77
Loans charged off	2	9	10	31
Less recoveries of loans charged off	-1	-1	-2	-3
Net loans charged off	1	8	8	28
Other changes	-10	-4	-35	-65
Balance at end of period	$102	$163	$102	$163

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 $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	$16	'	$32	'	'	'
TDRs collectively evaluated for impairment	447	'	520	'	'	'
Other loans collectively evaluated for impairment	3,822	'	3,815	'	'	'
Loans acquired with deteriorated credit quality	129	'	170	'	'	'
Total allowance for credit losses	4,414	4,449	4,537	4,578	4,612	4,733
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	447	'	496	'	'	'
TDRs collectively evaluated for impairment	5,896	'	6,243	'	'	'
Other loans collectively evaluated for impairment	235,824	'	224,557	'	'	'
Loans acquired with deteriorated credit quality	3,424	'	3,939	'	'	'
Total loans	238,537	'	226,773	'	'	'
Total loans	245,591	'	235,235	'	'	'
Commercial [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	10	'	15	'	'	'
TDRs collectively evaluated for impairment	13	'	19	'	'	'
Other loans collectively evaluated for impairment	1,113	'	1,041	'	'	'
Loans acquired with deteriorated credit quality	'	'	'	'	'	'
Total allowance for credit losses	1,136	1,111	1,075	1,031	1,023	1,051
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	237	'	197	'	'	'
TDRs collectively evaluated for impairment	129	'	155	'	'	'
Other loans collectively evaluated for impairment	78,511	'	69,680	'	'	'
Loans acquired with deteriorated credit quality	1	'	1	'	'	'
Total loans	78,878	'	70,033	'	'	'
Commercial Real Estate [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	6	'	17	'	'	'
TDRs collectively evaluated for impairment	15	'	26	'	'	'
Other loans collectively evaluated for impairment	662	'	700	'	'	'
Loans acquired with deteriorated credit quality	32	'	33	'	'	'
Total allowance for credit losses	715	725	776	761	777	857
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	158	'	237	'	'	'
TDRs collectively evaluated for impairment	273	'	358	'	'	'
Other loans collectively evaluated for impairment	40,368	'	39,129	'	'	'
Loans acquired with deteriorated credit quality	110	'	161	'	'	'
Total loans	40,909	'	39,885	'	'	'
Residential Mortgages [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	308	'	329	'	'	'
Other loans collectively evaluated for impairment	485	'	546	'	'	'
Loans acquired with deteriorated credit quality	'	'	'	'	'	'
Total allowance for credit losses	793	848	875	934	921	935
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	4,916	'	5,064	'	'	'
Other loans collectively evaluated for impairment	47,041	'	46,090	'	'	'
Loans acquired with deteriorated credit quality	'	'	2	'	'	'
Total loans	51,957	'	51,156	'	'	'
Credit Card [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	64	'	87	'	'	'
Other loans collectively evaluated for impairment	814	'	797	'	'	'
Loans acquired with deteriorated credit quality	'	'	'	'	'	'
Total allowance for credit losses	878	874	884	865	874	863
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	256	'	310	'	'	'
Other loans collectively evaluated for impairment	17,602	'	17,711	'	'	'
Loans acquired with deteriorated credit quality	'	'	'	'	'	'
Total loans	17,858	'	18,021	'	'	'
Other Retail [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	44	'	55	'	'	'
Other loans collectively evaluated for impairment	746	'	726	'	'	'
Loans acquired with deteriorated credit quality	'	'	'	'	'	'
Total allowance for credit losses	790	779	781	824	838	848
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	248	'	269	'	'	'
Other loans collectively evaluated for impairment	48,687	'	47,409	'	'	'
Loans acquired with deteriorated credit quality	'	'	'	'	'	'
Total loans	48,935	'	47,678	'	'	'
Total Loans, Excluding Covered Loans [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	16	'	32	'	'	'
TDRs collectively evaluated for impairment	444	'	516	'	'	'
Other loans collectively evaluated for impairment	3,820	'	3,810	'	'	'
Loans acquired with deteriorated credit quality	32	'	33	'	'	'
Total allowance for credit losses	4,312	4,337	4,391	4,415	4,433	4,554
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	395	'	434	'	'	'
TDRs collectively evaluated for impairment	5,822	'	6,156	'	'	'
Other loans collectively evaluated for impairment	232,209	'	220,019	'	'	'
Loans acquired with deteriorated credit quality	111	'	164	'	'	'
Total loans	238,537	'	226,773	'	'	'
Covered Loans [Member]	'	'	'	'	'	'
Allowance Balance at End of Period	'	'	'	'	'	'
Loans individually evaluated for impairment	'	'	'	'	'	'
TDRs collectively evaluated for impairment	3	'	4	'	'	'
Other loans collectively evaluated for impairment	2	'	5	'	'	'
Loans acquired with deteriorated credit quality	97	'	137	'	'	'
Total allowance for credit losses	102	112	146	163	179	179
Loan balance at end of period	'	'	'	'	'	'
Loans individually evaluated for impairment	52	'	62	'	'	'
TDRs collectively evaluated for impairment	74	'	87	'	'	'
Other loans collectively evaluated for impairment	3,615	'	4,538	'	'	'
Loans acquired with deteriorated credit quality	3,313	'	3,775	'	'	'
Total loans	$7,054	'	$8,462	'	'	'

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Delinquency Status of those that Continue to Accrue Interest and are Nonperforming (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	$242,011	$231,097
Accruing 30-89 Days Past Due	1,051	1,346
Accruing 90 Days or More Past Due	962	1,189
Nonperforming	1,567	1,603
Total loans, excluding covered loans	238,537	226,773
Total loans	245,591	235,235
Commercial [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	78,453	69,587
Accruing 30-89 Days Past Due	215	257
Accruing 90 Days or More Past Due	37	55
Nonperforming	173	134
Total loans, excluding covered loans	78,878	70,033
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	40,606	39,459
Accruing 30-89 Days Past Due	50	94
Accruing 90 Days or More Past Due	12	29
Nonperforming	241	303
Total loans, excluding covered loans	40,909	39,885
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	50,662	49,695
Accruing 30-89 Days Past Due	243	358
Accruing 90 Days or More Past Due	211	333
Nonperforming	841	770
Total loans, excluding covered loans	51,957	51,156
Credit Card [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	17,403	17,507
Accruing 30-89 Days Past Due	219	226
Accruing 90 Days or More Past Due	196	210
Nonperforming	40	78
Total loans, excluding covered loans	17,858	18,021
Other Retail [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	48,453	47,156
Accruing 30-89 Days Past Due	222	245
Accruing 90 Days or More Past Due	76	86
Nonperforming	184	191
Total loans, excluding covered loans	48,935	47,678
Total Loans, Excluding Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	235,577	223,404
Accruing 30-89 Days Past Due	949	1,180
Accruing 90 Days or More Past Due	532	713
Nonperforming	1,479	1,476
Total loans, excluding covered loans	238,537	226,773
Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Current	6,434	7,693
Accruing 30-89 Days Past Due	102	166
Accruing 90 Days or More Past Due	430	476
Nonperforming	88	127
Total loans	$7,054	$8,462

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Delinquency Status of those that Continue to Accrue Interest and are Nonperforming (Parenthetical) (Detail) (Government National Mortgage Association [Member], USD $)	Sep. 30, 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	$422,000,000	$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	$3,100,000,000	$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 $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	$238,537	$226,773
Total loans	245,591	235,235
Total outstanding commitments	501,206	477,797
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	240,139	229,546
Total outstanding commitments	494,015	470,046
Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1,899	1,679
Total outstanding commitments	2,990	2,939
Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	3,553	4,010
Total outstanding commitments	4,201	4,812
Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	5,452	5,689
Total outstanding commitments	7,191	7,751
Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	78,878	70,033
Commercial [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	76,688	68,075
Commercial [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,396	1,013
Commercial [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	794	945
Commercial [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	2,190	1,958
Commercial Real Estate [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	40,909	39,885
Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	39,591	38,113
Commercial Real Estate [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	474	616
Commercial Real Estate [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	844	1,156
Commercial Real Estate [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,318	1,772
Residential Mortgages [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	51,957	51,156
Residential Mortgages [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	50,817	50,152
Residential Mortgages [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	8	5
Residential Mortgages [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,132	999
Residential Mortgages [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,140	1,004
Credit Card [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	17,858	18,021
Credit Card [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	17,622	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	236	288
Credit Card [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	236	288
Other Retail [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	48,935	47,678
Other Retail [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	48,569	47,313
Other Retail [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	18	27
Other Retail [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	348	338
Other Retail [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	366	365
Total Loans, Excluding Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	238,537	226,773
Total Loans, Excluding Covered Loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	233,287	221,386
Total Loans, Excluding Covered Loans [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	1,896	1,661
Total Loans, Excluding Covered Loans [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	3,354	3,726
Total Loans, Excluding Covered Loans [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans, excluding covered loans	5,250	5,387
Covered Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	7,054	8,462
Covered Loans [Member] | Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	6,852	8,160
Covered Loans [Member] | Special Mention Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	3	18
Covered Loans [Member] | Classified Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	199	284
Covered Loans [Member] | Total Criticized [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	$202	$302

Recovered_Sheet1

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Company's Internal Credit Quality Rating (Parenthetical) (Detail) (Trouble Debt Restructure [Member], Government National Mortgage Association [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Trouble Debt Restructure [Member] | Government National Mortgage Association [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	$2.50	$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	$3.10	$3.70

Recovered_Sheet2

Loans and Allowance for Credit Losses - Summary of Impaired Loans by Portfolio Class (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	$7,070	$7,602
Unpaid Principal Balance	9,317	10,136
Valuation Allowance	500	599
Commitments to Lend Additional Funds	154	112
Commercial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	408	382
Unpaid Principal Balance	848	804
Valuation Allowance	27	36
Commitments to Lend Additional Funds	135	54
Commercial Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	525	693
Unpaid Principal Balance	1,037	1,322
Valuation Allowance	30	51
Commitments to Lend Additional Funds	14	40
Residential Mortgages [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	2,740	2,767
Unpaid Principal Balance	3,678	3,492
Valuation Allowance	261	308
Commitments to Lend Additional Funds	'	'
Credit Card [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	256	310
Unpaid Principal Balance	256	310
Valuation Allowance	64	87
Commitments to Lend Additional Funds	'	'
Other Retail [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	368	391
Unpaid Principal Balance	413	593
Valuation Allowance	47	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	4,297	4,543
Unpaid Principal Balance	6,232	6,521
Valuation Allowance	429	541
Commitments to Lend Additional Funds	153	108
Loans Purchased from GNMA Mortgage Pools [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	2,478	2,607
Unpaid Principal Balance	2,478	2,607
Valuation Allowance	51	28
Commitments to Lend Additional Funds	'	'
Covered Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Period-end Recorded Investment	295	452
Unpaid Principal Balance	607	1,008
Valuation Allowance	20	30
Commitments to Lend Additional Funds	$1	$4

Recovered_Sheet3

Loans and Allowance for Credit Losses - Impaired Loans Average Recorded Investment and Interest Income (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	$7,325	$7,130	$7,514	$7,346
Interest Income Recognized	81	81	260	270
Commercial [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	425	380	430	384
Interest Income Recognized	4	5	8	24
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	541	819	598	950
Interest Income Recognized	4	6	17	27
Residential Mortgages [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	2,740	2,765	2,744	2,744
Interest Income Recognized	33	32	105	99
Credit Card [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	264	347	281	380
Interest Income Recognized	1	3	7	12
Other Retail [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	373	417	381	431
Interest Income Recognized	5	7	13	19
Total Impaired Loans, Excluding GNMA and Covered Loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	4,343	4,728	4,434	4,889
Interest Income Recognized	47	53	150	181
Loans Purchased from GNMA Mortgage Pools [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	2,647	1,883	2,691	1,869
Interest Income Recognized	29	22	95	68
Covered Loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	335	519	389	588
Interest Income Recognized	$5	$6	$15	$21

Recovered_Sheet4

Loans and Allowance for Credit Losses - Summary of Loans Modified as TDRs (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	SecurityLoan	SecurityLoan	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	10,809	10,584	32,941	33,909
Pre-Modification Outstanding Loan Balance	$447	$559	$1,439	$1,672
Post-Modification Outstanding Loan Balance	444	529	1,408	1,589
Commercial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	448	551	1,633	1,962
Pre-Modification Outstanding Loan Balance	28	62	181	150
Post-Modification Outstanding Loan Balance	26	60	169	140
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	27	48	54	147
Pre-Modification Outstanding Loan Balance	14	76	33	193
Post-Modification Outstanding Loan Balance	13	73	28	186
Residential Mortgages [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	525	338	1,732	1,575
Pre-Modification Outstanding Loan Balance	71	42	232	214
Post-Modification Outstanding Loan Balance	70	42	231	210
Credit Card [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	6,708	6,447	20,040	20,147
Pre-Modification Outstanding Loan Balance	35	39	111	122
Post-Modification Outstanding Loan Balance	36	38	112	122
Other Retail [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	810	847	2,246	3,519
Pre-Modification Outstanding Loan Balance	18	21	52	86
Post-Modification Outstanding Loan Balance	18	21	52	85
Total Loans, Excluding GNMA and Covered Loans [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	8,518	8,231	25,705	27,350
Pre-Modification Outstanding Loan Balance	166	240	609	765
Post-Modification Outstanding Loan Balance	163	234	592	743
Loans Purchased from GNMA Mortgage Pools [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	2,273	2,315	7,198	6,450
Pre-Modification Outstanding Loan Balance	278	300	816	822
Post-Modification Outstanding Loan Balance	278	284	803	782
Covered Loans [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	18	38	38	109
Pre-Modification Outstanding Loan Balance	3	19	14	85
Post-Modification Outstanding Loan Balance	$3	$11	$13	$64

Recovered_Sheet5

Loans and Allowance for Credit Losses - Summary of Loans Modified as TDRs in the Past Twelve Months that have Subsequently Defaulted (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	SecurityLoan	SecurityLoan	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	2,493	2,755	6,527	12,345
Amount Defaulted	$112	$208	$221	$966
Commercial [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	161	143	456	483
Amount Defaulted	34	37	42	42
Commercial Real Estate [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	4	30	16	72
Amount Defaulted	'	18	10	90
Residential Mortgages [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	147	303	424	673
Amount Defaulted	22	41	61	100
Credit Card [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	1,665	1,485	4,586	5,109
Amount Defaulted	9	8	25	29
Other Retail [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	146	278	489	1,164
Amount Defaulted	5	10	15	53
Total Loans, Excluding GNMA and Covered Loans [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	2,123	2,239	5,971	7,501
Amount Defaulted	70	114	153	314
Loans Purchased from GNMA Mortgage Pools [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	366	492	542	4,795
Amount Defaulted	41	69	63	615
Covered Loans [Member]	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'
Number of Loans	4	24	14	49
Amount Defaulted	$1	$25	$5	$37

Recovered_Sheet6

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	$3,313	$3,775
Purchased Nonimpaired Loans	2,497	3,087
Other Assets	1,316	1,697
Covered loans	7,054	8,462
Total covered assets	7,126	8,559
Commercial [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	21	32
Other Assets	'	'
Covered loans	21	32
Commercial Real Estate [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	464	738
Purchased Nonimpaired Loans	1,093	1,494
Other Assets	'	'
Covered loans	1,557	2,232
Residential Mortgages [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	2,849	3,037
Purchased Nonimpaired Loans	774	890
Other Assets	'	'
Covered loans	3,623	3,927
Credit Card [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	4	5
Other Assets	'	'
Covered loans	4	5
Other Retail [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	605	666
Other Assets	'	'
Covered loans	605	666
Losses Reimbursable by FDIC [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	'	'
Other Assets	737	798
Covered loans	737	798
Unamortized Changes in FDIC asset [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	'	'
Other Assets	507	802
Covered loans	507	802
Covered Loans [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	3,313	3,775
Purchased Nonimpaired Loans	2,497	3,087
Other Assets	1,244	1,600
Covered loans	7,054	8,462
Foreclosed Real Estate [Member]	'	'
Covered Assets [Line Items]	'	'
Purchased Impaired Loans	'	'
Purchased Nonimpaired Loans	'	'
Other Assets	72	97
Total covered assets	$72	$97

Recovered_Sheet7

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Minimum [Member]	'	'	'	'	'
Variable Interest Entity [Line Items]	'	'	'	'	'
Aggregate amount of investments in unconsolidated VIEs	$1,000,000	'	$1,000,000	'	$1,000,000
Maximum [Member]	'	'	'	'	'
Variable Interest Entity [Line Items]	'	'	'	'	'
Aggregate amount of investments in unconsolidated VIEs	54,000,000	'	54,000,000	'	37,000,000
Conduit [Member]	'	'	'	'	'
Variable Interest Entity [Line Items]	'	'	'	'	'
Assets related to consolidated VIEs	114,000,000	'	114,000,000	'	116,000,000
Tender Option Bond Program [Member]	'	'	'	'	'
Variable Interest Entity [Line Items]	'	'	'	'	'
Assets related to consolidated VIEs	4,100,000,000	'	4,100,000,000	'	4,600,000,000
Liabilities related to consolidated VIEs	3,900,000,000	'	3,900,000,000	'	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	189,000,000	187,000,000	546,000,000	527,000,000	'
Expense related to investments	187,000,000	247,000,000	517,000,000	686,000,000	'
Expenses related to investments recognized in tax expense	60,000,000	87,000,000	190,000,000	267,000,000	'
Investment tax credits	262,000,000	254,000,000	582,000,000	454,000,000	'
Assets related to consolidated VIEs	2,600,000,000	'	2,600,000,000	'	2,500,000,000
Liabilities related to consolidated VIEs	2,000,000,000	'	2,000,000,000	'	1,800,000,000
Investment carrying amount	4,385,000,000	'	4,385,000,000	'	4,178,000,000
Maximum exposure to loss	8,038,000,000	'	8,038,000,000	'	7,390,000,000
Private Investment Funds And Partnerships [Member]	'	'	'	'	'
Variable Interest Entity [Line Items]	'	'	'	'	'
Investment carrying amount	97,000,000	'	97,000,000	'	98,000,000
Maximum exposure to loss	$106,000,000	'	$106,000,000	'	$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 $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Community Development and Tax Advantaged Investments [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Investment carrying amount	$4,385	$4,178
Unfunded capital and other commitments	1,850	1,661
Maximum exposure to loss	$8,038	$7,390

Mortgage_Servicing_Rights_Addi

Mortgage Servicing Rights - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 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	$224,600,000,000	'	$224,600,000,000	'	$226,800,000,000
Gain/Loss on fair value changes of MSRs due to changes in valuation assumptions and derivatives used to economically hedge MSRs	49,000,000	108,000,000	200,000,000	163,000,000	'
Loan servicing fees	178,000,000	192,000,000	551,000,000	566,000,000	'
Gain related to excess servicing rights sold	$44,000,000	'	'	'	'

Mortgage_Servicing_Rights_Chan

Mortgage Servicing Rights - Changes in Fair Value of Capitalized MSRs (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Transfers and Servicing of Financial Assets [Abstract]	'	'	'	'
Balance at beginning of period	$2,412	$2,377	$2,680	$1,700
Rights purchased	1	2	3	7
Rights capitalized	109	187	264	674
Rights sold	'	'	-141	'
Changes in fair value of MSRs	'	'	'	'
Due to fluctuations in market interest rates	29	71	-129	503
Due to revised assumptions or models	15	42	71	33
Other changes in fair value	-105	-102	-287	-340
Balance at end of period	$2,461	$2,577	$2,461	$2,577

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 $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Down Scenario [Member] | Mortgage Servicing Rights [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	($490)	($435)
Net fair value 50 basis points	-212	-199
Net fair value 25 basis points	-99	-93
Down Scenario [Member] | Derivative [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	391	399
Net fair value 50 basis points	196	194
Net fair value 25 basis points	94	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	-99	-36
Net fair value 50 basis points	-16	-5
Net fair value 25 basis points	-5	-2
Up Scenario [Member] | Mortgage Servicing Rights [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	157	154
Net fair value 25 basis points	84	82
Up Scenario [Member] | Derivative [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	-319	-301
Net fair value 50 basis points	-167	-157
Net fair value 25 basis points	-87	-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	-22	-14
Net fair value 50 basis points	-10	-3
Net fair value 25 basis points	($3)	'

Mortgage_Servicing_Rights_MSRs

Mortgage Servicing Rights - MSRs and Related Characteristics by Portfolio (Detail) (USD $)

Sep. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

In Millions, unless otherwise specified

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

MRBP [Member]

MRBP [Member]

Government [Member]

Government [Member]

Conventional [Member]

Conventional [Member]

BasisPoint

Multiple

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

Mortgage Servicing Rights [Member]

Multiple

BasisPoint

Multiple

Multiple

BasisPoint

Multiple

BasisPoint

Multiple

BasisPoint

BasisPoint

Multiple

BasisPoint

Multiple

BasisPoint

Servicing Assets at Fair Value [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Servicing portfolio

'

'

'

'

'

'

$222,409

$226,842

$18,052

$15,896

$40,600

$41,659

$163,757

$169,287

Fair value

$2,461

$2,412

$2,680

$2,577

$2,377

$1,700

$2,461

$2,680

$199

$180

$469

$500

$1,793

$2,000

Value (bps)

'

'

'

'

'

'

111

118

110

113

116

120

109

118

Weighted-average servicing fees (bps)

'

'

'

'

'

'

29

30

37

39

33

32

27

29

Multiple (value/servicing fees)

'

'

'

'

'

'

3.83

3.93

2.97

2.9

3.52

3.75

4.04

4.07

Weighted-average note rate

'

'

'

'

'

'

4.20%

4.22%

4.62%

4.70%

4.20%

4.24%

4.15%

4.17%

Weighted-average age (in years)

'

'

'

'

'

'

'3 years 1 month 6 days

'2 years 7 months 6 days

'3 years 8 months 12 days

'3 years 9 months 18 days

'3 years 1 month 6 days

'2 years 7 months 6 days

'3 years

'2 years 6 months

Weighted-average expected prepayment (constant prepayment rate)

'

'

'

'

'

'

11.10%

11.20%

12.90%

13.50%

12.40%

11.50%

10.60%

10.90%

Weighted-average expected life (in years)

'

'

'

'

'

'

'6 years 9 months 18 days

'7 years 1 month 6 days

'6 years 2 months 12 days

'6 years 2 months 12 days

'6 years 4 months 24 days

'6 years 10 months 24 days

'7 years

'7 years 2 months 12 days

Weighted-average discount rate

'

'

'

'

'

'

10.10%

10.20%

11.90%

11.90%

11.20%

11.20%

9.60%

9.80%

Preferred_Stock_Additional_Inf

Preferred Stock - Additional Information (Detail)	Sep. 30, 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 $)	Sep. 30, 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 $)	Sep. 30, 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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Balance at beginning of period	($682)	($1,288)	($1,071)	($923)
Changes in unrealized gains and losses	-21	-237	486	-1,032
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Derivative Hedges	16	-17	-19	33
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Retirement Plans	'	38	'	37
Changes in unrealized gains and losses	-5	-216	467	-962
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	1	1	8
Foreign currency translation adjustment	4	13	18	-20
Reclassification to earnings of realized gains and losses	76	99	221	270
Applicable income taxes	-29	40	-272	276
Balance at end of period	-636	-1,351	-636	-1,351
Foreign Currency Translation [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Balance at beginning of period	-51	-60	-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	13	18	-20
Reclassification to earnings of realized gains and losses	'	'	'	'
Applicable income taxes	-2	-5	-7	8
Balance at end of period	-49	-52	-49	-52
Unrealized Gains (Losses) on Retirement Plans [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Balance at beginning of period	-699	-1,184	-743	-1,265
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Retirement Plans	'	38	'	37
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	35	62	107	186
Applicable income taxes	-14	-38	-42	-80
Balance at end of period	-678	-1,122	-678	-1,122
Unrealized Gains (Losses) on Derivative Hedges [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Balance at beginning of period	-225	-313	-261	-404
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Derivative Hedges	16	-17	-19	33
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	45	47	139	142
Applicable income taxes	-23	-11	-46	-65
Balance at end of period	-187	-294	-187	-294
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	60	84	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	-13	-23	-50
Applicable income taxes	3	5	9	19
Balance at end of period	56	76	56	76
Unrealized Gains (Losses) on Securities Available-For-Sale [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Balance at beginning of period	233	185	-77	679
Changes in unrealized gains and losses	-21	-237	486	-1,032
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	'	1	1	8
Foreign currency translation adjustment	'	'	'	'
Reclassification to earnings of realized gains and losses	3	3	-2	-8
Applicable income taxes	7	89	-186	394
Balance at end of period	$222	$41	$222	$41

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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Realized gains (losses) on sale of securities	'	'	$8	$21
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Interest income	3,057	3,068	9,126	9,217
Gains (Losses) on derivative hedges	2,692	2,658	8,031	7,927
Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization	-250	-278	-796	-865
Total securities gains (losses), net	-3	-3	2	8
Applicable income taxes	-523	-542	-1,566	-1,629
Net income	1,486	1,430	4,407	4,261
Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Net income	-47	-61	-136	-165
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	'	'	8	21
Other-than-temporary impairment recognized in earnings	-3	-3	-6	-13
Total securities gains (losses), net	-3	-3	2	8
Applicable income taxes	1	1	-1	-3
Net income	-2	-2	1	5
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	13	23	50
Applicable income taxes	-3	-5	-9	-19
Net income	4	8	14	31
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	-45	-47	-139	-142
Applicable income taxes	17	18	53	55
Net income	-28	-29	-86	-87
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	-35	-62	-107	-186
Applicable income taxes	14	24	42	72
Net income	($21)	($38)	($65)	($114)

Earnings_Per_Share_Components_

Earnings Per Share - Components of Earnings Per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Net income attributable to U.S. Bancorp	$1,471	$1,468	$4,363	$4,380
Preferred dividends	-60	-61	-181	-189
Impact of preferred stock redemption	'	'	'	-8
Earnings allocated to participating stock awards	-6	-7	-19	-20
Net income applicable to U.S. Bancorp common shareholders	$1,405	$1,400	$4,163	$4,163
Average common shares outstanding	1,798	1,832	1,809	1,844
Net effect of the exercise and assumed purchase of stock awards	9	11	10	10
Average diluted common shares outstanding	1,807	1,843	1,819	1,854
Earnings per common share	$0.78	$0.76	$2.30	$2.26
Diluted earnings per common share	$0.78	$0.76	$2.29	$2.25

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail) (Stock Option [Member])	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Stock Option [Member]	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'
Options outstanding of common shares	9

Employee_Benefits_Components_o

Employee Benefits - Components of Net Periodic Benefit Cost (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plans [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	$38	$42	$114	$126
Interest cost	50	43	148	128
Expected return on plan assets	-51	-44	-155	-132
Prior service cost (credit) and transition obligation (asset) amortization	-2	-1	-4	-4
Actuarial loss (gain) amortization	39	66	118	198
Net periodic benefit cost	74	106	221	316
Postretirement Welfare Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	'	1	'	3
Interest cost	1	1	3	3
Expected return on plan assets	-1	'	-1	-1
Prior service cost (credit) and transition obligation (asset) amortization	-1	'	-3	'
Actuarial loss (gain) amortization	-1	-3	-4	-8
Net periodic benefit cost	($2)	($1)	($5)	($3)

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Federal	'	'	'	'
Current	$423	$390	$1,334	$1,506
Deferred	10	57	-19	-35
Federal income tax	433	447	1,315	1,471
State	'	'	'	'
Current	101	84	268	161
Deferred	-11	11	-17	-3
State income tax	90	95	251	158
Applicable income taxes	$523	$542	$1,566	$1,629

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	9 Months Ended
In Billions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Income Taxes Additional Information [Abstract]	'	'
Federal statutory rate	35.00%	'
Net deferred tax liability	$1.80	$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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]	'	'	'	'
Tax at statutory rate	$704	$690	$2,091	$2,061
State income tax, at statutory rates, net of federal tax benefit	62	62	163	102
Tax credits and benefits, net of related expenses	-186	-176	-535	-394
Tax-exempt income	-51	-52	-154	-159
Noncontrolling interests	-5	13	-15	42
Other items	-1	5	16	-23
Applicable income taxes	$523	$542	$1,566	$1,629

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 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)	$187,000,000	$261,000,000	'	'
Estimated loss to be reclassified from other comprehensive income (loss) into earnings	'	'	31,000,000	121,000,000
Forward commitments to sell mortgage loans	6,600,000,000	'	'	'
Hedged mortgage loans held for sale	3,100,000,000	'	'	'
Unfunded mortgage loan commitments	4,400,000,000	'	'	'
Fair value of derivatives under collateral agreements in a net liability position	868,000,000	'	'	'
Collateral posted by company netted against net liability position	$697,000,000	'	'	'

Derivative_Instruments_Asset_a

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Detail) (Asset and Liability Management Positions [Member], USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]	'	'
Notional Value, Assets	$26,822	$28,119
Fair Value, Assets	168	189
Derivative Asset Average Remaining Maturity Period	'	'
Notional Value, Liabilities	17,816	14,730
Fair Value, Liabilities	480	580
Derivative Liability Average Remaining Maturity Period	'	'
Fair Value Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,750	500
Fair Value, Assets	21	22
Derivative Asset Average Remaining Maturity Period	'3 years 7 months 24 days	'2 years 1 month 2 days
Notional Value, Liabilities	1,000	'
Fair Value, Liabilities	4	'
Derivative Liability Average Remaining Maturity Period	'9 years 11 months 16 days	'
Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	5,500	7,000
Fair Value, Assets	6	26
Derivative Asset Average Remaining Maturity Period	'1 month 24 days	'10 months 2 days
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,972	772
Fair Value, Assets	15	26
Derivative Asset Average Remaining Maturity Period	'3 years 8 months 23 days	'6 years 3 months
Notional Value, Liabilities	4,084	4,288
Fair Value, Liabilities	351	498
Derivative Liability Average Remaining Maturity Period	'1 year 9 months 22 days	'2 years 5 months 16 days
Net Investment Hedges [Member] | Foreign Exchange Forward Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,043	'
Fair Value, Assets	29	'
Derivative Asset Average Remaining Maturity Period	'18 days	'
Notional Value, Liabilities	'	1,056
Fair Value, Liabilities	'	4
Derivative Liability Average Remaining Maturity Period	'	'15 days
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	6	'
Derivative Asset Average Remaining Maturity Period	'10 years 2 months 19 days	'
Notional Value, Liabilities	232	3,540
Fair Value, Liabilities	3	56
Derivative Liability Average Remaining Maturity Period	'10 years 2 months 19 days	'10 years 2 months 19 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	'	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'	'
Notional Value, Liabilities	55	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'10 years 2 months 19 days	'
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,981	2,310
Fair Value, Assets	20	9
Derivative Asset Average Remaining Maturity Period	'1 month 2 days	'26 days
Notional Value, Liabilities	1,422	1,025
Fair Value, Liabilities	4	7
Derivative Liability Average Remaining Maturity Period	'18 days	'22 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,691	5,234
Fair Value, Assets	10	58
Derivative Asset Average Remaining Maturity Period	'1 month 6 days	'29 days
Notional Value, Liabilities	4,077	346
Fair Value, Liabilities	22	4
Derivative Liability Average Remaining Maturity Period	'1 month 10 days	'2 months 1 day
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,100	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	'	'
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,349	1,902
Fair Value, Assets	32	17
Derivative Asset Average Remaining Maturity Period	'29 days	'26 days
Notional Value, Liabilities	8	2
Fair Value, Liabilities	1	'
Derivative Liability Average Remaining Maturity Period	'29 days	'29 days
Other Economic Hedges [Member] | Foreign Exchange Forward Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,049	6,813
Fair Value, Assets	11	24
Derivative Asset Average Remaining Maturity Period	'7 days	'7 days
Notional Value, Liabilities	3,576	2,121
Fair Value, Liabilities	38	4
Derivative Liability Average Remaining Maturity Period	'4 days	'7 days
Other Economic Hedges [Member] | Equity Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	27	79
Fair Value, Assets	'	3
Derivative Asset Average Remaining Maturity Period	'1 year 1 month 17 days	'1 year 7 months 13 days
Notional Value, Liabilities	57	'
Fair Value, Liabilities	1	'
Derivative Liability Average Remaining Maturity Period	'8 months 19 days	'
Other Economic Hedges [Member] | Credit Contracts [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	1,263	1,209
Fair Value, Assets	3	4
Derivative Asset Average Remaining Maturity Period	'3 years 4 months 24 days	'4 years 15 days
Notional Value, Liabilities	2,288	2,352
Fair Value, Liabilities	5	7
Derivative Liability Average Remaining Maturity Period	'3 years 15 days	'3 years 29 days
Other Derivatives [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	722	'
Fair Value, Assets	15	'
Derivative Asset Average Remaining Maturity Period	'4 days	'
Notional Value, Liabilities	1,017	'
Fair Value, Liabilities	$51	'
Derivative Liability Average Remaining Maturity Period	'1 year 2 months 1 day	'

Derivative_Instruments_Asset_a1

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Parenthetical) (Detail) (Asset and Liability Management Positions [Member], USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]	'	'
Derivative liability swap agreement notional value	$17,816	$14,730
Derivative liability swap agreement fair value	480	580
Derivative asset swap agreement notional value	26,822	28,119
Derivative liability swap agreement maturity	'	'
Underwriting Purchase And Sale Commitments [Member]	'	'
Derivative [Line Items]	'	'
Derivative liability swap agreement notional value	722	'
Derivative asset swap agreement notional value	722	'
Swap [Member] | Visa Class B [Member]	'	'
Derivative [Line Items]	'	'
Derivative liability swap agreement notional value	295	'
Derivative liability swap agreement fair value	$42	'
Derivative liability swap agreement maturity	'4 years 4 days	'

Derivative_Instruments_Custome

Derivative Instruments - Customer-Related Derivative Positions of Company (Detail) (Customer-Related Positions [Member], USD $)	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]	'	'
Notional Value, Assets	$44,277	$33,286
Fair Value, Assets	1,326	1,215
Notional Value, Liabilities	43,107	33,480
Fair Value, Liabilities	1,292	1,137
Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	16,055	11,717
Fair Value, Assets	645	600
Derivative Asset Average Remaining Maturity Period	'5 years 11 months 9 days	'5 years 1 month 10 days
Notional Value, Liabilities	8,509	7,291
Fair Value, Liabilities	47	106
Derivative Liability Average Remaining Maturity Period	'4 years 3 months 29 days	'5 years 6 months 26 days
Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	7,215	6,746
Fair Value, Assets	54	114
Derivative Asset Average Remaining Maturity Period	'3 years 11 months 23 days	'6 years 11 days
Notional Value, Liabilities	16,384	12,361
Fair Value, Liabilities	638	560
Derivative Liability Average Remaining Maturity Period	'5 years 10 months 10 days	'4 years 10 months 24 days
Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	4,110	3,489
Fair Value, Assets	10	33
Derivative Asset Average Remaining Maturity Period	'3 years 10 months 2 days	'4 years 6 months 11 days
Notional Value, Liabilities	24	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'2 years 8 months 1 day	'
Interest Rate Contracts [Member] | Options [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	24	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'2 years 8 months 1 day	'
Notional Value, Liabilities	4,096	3,489
Fair Value, Liabilities	10	33
Derivative Liability Average Remaining Maturity Period	'3 years 10 months 6 days	'4 years 6 months 11 days
Interest Rate Contracts [Member] | Futures [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	2,439	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'3 months	'
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Interest Rate Contracts [Member] | Futures [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	334	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'1 year 3 months 11 days	'
Notional Value, Liabilities	131	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'11 months 16 days	'
Foreign Exchange Rate Contracts [Member] | Forwards, Spots and Swaps [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	13,349	10,970
Fair Value, Assets	595	457
Derivative Asset Average Remaining Maturity Period	'6 months 18 days	'7 months 2 days
Notional Value, Liabilities	13,212	9,975
Fair Value, Liabilities	575	427
Derivative Liability Average Remaining Maturity Period	'6 months 18 days	'7 months 13 days
Foreign Exchange Option [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	751	364
Fair Value, Assets	22	11
Derivative Asset Average Remaining Maturity Period	'6 months 26 days	'6 months 11 days
Notional Value, Liabilities	'	'
Fair Value, Liabilities	'	'
Derivative Liability Average Remaining Maturity Period	'	'
Foreign Exchange Option [Member] | Written [Member]	'	'
Derivative [Line Items]	'	'
Notional Value, Assets	'	'
Fair Value, Assets	'	'
Derivative Asset Average Remaining Maturity Period	'0 years	'
Notional Value, Liabilities	751	364
Fair Value, Liabilities	$22	$11
Derivative Liability Average Remaining Maturity Period	'6 months 26 days	'6 months 11 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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 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	$10	($11)	($12)	$22
Derivative Instruments, Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	-28	-30	-86	-88
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	84	-29	93	-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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Asset and Liability Management Positions [Member] | Other noninterest income [Member] | Other Derivatives [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains (losses) recognized in earnings	$1	'	($42)	'
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	-19	'	-13	-7
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	6	33	-69	569
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	64	54	210	200
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	17	-5	238	-264
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	-24	-16	-41	18
Asset and Liability Management Positions [Member] | Equity Contracts [Member] | Compensation expense [Member] | Other Economic Hedges [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Gains (losses) recognized in earnings	'	'	1	1
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	'	2	'	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	-20	13	329	-288
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	28	-10	-307	298
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	$13	$15	$45	$36

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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 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	$19	$0	$13	$7

Netting_Arrangements_for_Certa2

Netting Arrangements for Certain Financial Instruments - Additional Information (Detail) (USD $)	Sep. 30, 2014
In Billions, unless otherwise specified
Derivative [Line Items]	'
Notional amount of derivative	$132
Exchange Cleared [Member]	'
Derivative [Line Items]	'
Notional amount of derivative	27.6
Exchange Traded [Member]	'
Derivative [Line Items]	'
Notional amount of derivative	$3.30

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 $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]	'	'
Derivative assets Gross Recognized Assets	$1,363	$1,349
Reverse repurchase agreements Gross Recognized Assets	107	87
Securities borrowed Gross Recognized Assets	583	723
Total Gross Recognized Assets	2,053	2,159
Derivative assets Gross amounts assets offset in consolidated balance sheet	-670	-599
Total Gross amounts assets offset in consolidated balance sheet	-670	-599
Derivative assets Net Amounts Presented in the Consolidated Balance Sheet	693	750
Reverse repurchase agreements Net Amounts Presented in the Consolidated Balance Sheet	107	87
Securities borrowed Net Amounts Presented in the Consolidated Balance Sheet	583	723
Total Net Amounts Presented in the Consolidated Balance Sheet	1,383	1,560
Derivative assets Gross Amounts Not Offset Consolidated Balance Financial Instruments	-36	-21
Reverse repurchase agreements Gross financial instrument asset amounts not offset in consolidated balance sheet	-56	-59
Securities borrowed Gross financial instrument asset amounts not offset in consolidated balance sheet	-14	'
Total Gross financial instrument asset amounts not offset in consolidated balance sheet	-106	-80
Reverse repurchase agreements Gross collateral received amounts not offset in consolidated balance sheet	-51	-28
Securities borrowed Gross collateral received amounts not offset in consolidated balance sheet	-551	-698
Total Gross collateral received amounts not offset in consolidated balance sheet	-602	-726
Derivative assets Net Amount	657	729
Reverse repurchase agreements Net Amount	'	'
Securities borrowed Net Amount	18	25
Total Net Amount Assets	675	754
Derivative liabilities Gross recognized liabilities	1,569	1,598
Repurchase agreements Gross recognized liabilities	686	2,059
Securities loaned Gross recognized liabilities	87	'
Total Gross recognized liabilities	2,342	3,657
Derivative liabilities Gross amounts liabilities offset in consolidated balance sheet	-1,127	-1,192
Total Gross amounts liabilities offset in consolidated balance sheet	-1,127	-1,192
Derivative liabilities Net amounts liabilities presented in consolidated balance sheet	442	406
Repurchase agreements Net amounts liabilities presented in consolidated balance sheet	686	2,059
Securities loaned Net amounts liabilities presented in consolidated balance sheet	87	'
Total Net amounts liabilities presented in consolidated balance sheet	1,215	2,465
Derivative liabilities Gross financial instrument liability amounts not offset in consolidated balance sheet	-36	-21
Repurchase agreements Gross financial instrument liability amounts not offset in consolidated balance sheet	-56	-59
Securities loaned Gross financial instruments not offset in consolidated balance sheet	-14	'
Total Gross financial instrument liability amounts not offset in consolidated balance sheet	-106	-80
Repurchase agreements Gross collateral pledged amounts not offset in consolidated balance sheet	-630	-2,000
Securities loaned Gross collateral pledged amounts not offset in consolidated balance sheet	-72	'
Total Gross collateral pledged amounts not offset in consolidated balance sheet	-702	-2,000
Derivative liabilities Net Amount	406	385
Repurchase agreements Net Amount	'	'
Securities loaned net amount	1	'
Total Net Amount Liabilities	$407	$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 $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]	'	'
Cash collateral netted against derivative assets	$156	$124
Derivative assets not subject to netting arrangements	131	55
Cash collateral netted against derivative liabilities	613	717
Derivative liabilities not subject to netting arrangements	$203	$119

Fair_Values_of_Assets_and_Liab2

Fair Values of Assets and Liabilities - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 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)	4	-5	102	-326	'	'	'	'	'	'	'
Assumed credit valuation adjustment as percentage of underlying fair value of underlying derivative contracts	'	'	'	'	'	'	'	'	0.00%	93.00%	7.00%
Carrying value of guarantee obligations	'	'	'	'	$433	$382	$235	$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) (Level 3 [Member])	9 Months Ended
	Sep. 30, 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	3.00%
Lifetime probability of default rates	4.00%
Lifetime loss severity rates	20.00%
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	6.00%
Maximum [Member] | Non-agency Prime [Member] | Mortgage-backed securities Residential [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Estimated lifetime prepayment rates	20.00%
Lifetime probability of default rates	8.00%
Lifetime loss severity rates	75.00%
Discount margin	4.00%
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	14.00%
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	6.00%
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	36.00%
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	8.00%
Lifetime loss severity rates	53.00%
Discount margin	2.00%
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	6.00%

Fair_Values_of_Assets_and_Liab4

Fair Values of Assets and Liabilities - Valuation Assumption Ranges for MSRs (Detail) (Mortgage Servicing Rights [Member])	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	11.10%	11.20%
Discount rate	10.10%	10.20%
Minimum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	10.00%	'
Discount rate	9.00%	'
Maximum [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Expected prepayment	20.00%	'
Discount rate	13.00%	'
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) (Derivative Mortgage Loans Commitments [Member])	Sep. 30, 2014
Minimum [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Expected loan close rate	42.00%
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)	2.14%
Average [Member]	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'
Expected loan close rate	76.00%
Inherent MSR value (basis points per loan)	1.29%

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 $)	Sep. 30, 2014		Jun. 30, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'	'
Derivative liabilities netting	($1,127)		'	($1,192)		'	'	'
Derivative liabilities total	442		'	406		'	'	'
Derivative assets netting	-670		'	-599		'	'	'
Derivative assets total	693		'	750		'	'	'
Available-for-sale securities	52,674	[1]	'	40,935	[1]	'	'	'
Mortgage loans held for sale	3,918		'	3,263		'	'	'
Mortgage servicing rights	2,461		2,412	2,680		2,577	2,377	1,700
Fair Value, Measurements, Recurring [Member]	'		'	'		'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'	'
Derivative liabilities total	645		'	525		'	'	'
Derivative assets total	824		'	805		'	'	'
Available-for-sale securities	52,674		'	40,935		'	'	'
Mortgage loans held for sale	3,918		'	3,263		'	'	'
Mortgage servicing rights	2,461		'	2,680		'	'	'
Other assets	1,183		'	731		'	'	'
Total	61,060		'	48,414		'	'	'
Short-term borrowings	768		'	663		'	'	'
Total	1,413		'	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	2,678		'	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	5,563		'	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	639		'	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	220		'	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	254		'	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	426		'	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	284		'	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	41,837		'	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	122		'	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	622		'	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	23		'	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	1,580		'	148		'	'	'
Mortgage loans held for sale	'		'	'		'	'	'
Mortgage servicing rights	'		'	'		'	'	'
Other assets	157		'	143		'	'	'
Total	1,737		'	291		'	'	'
Short-term borrowings	160		'	112		'	'	'
Total	160		'	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	1,345		'	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	235		'	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	1,680		'	1,647		'	'	'
Derivative assets before netting	937		'	889		'	'	'
Available-for-sale securities	50,311		'	39,940		'	'	'
Mortgage loans held for sale	3,918		'	3,263		'	'	'
Mortgage servicing rights	'		'	'		'	'	'
Other assets	1,026		'	588		'	'	'
Total	56,192		'	44,680		'	'	'
Short-term borrowings	608		'	551		'	'	'
Total	2,288		'	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	1,333		'	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	5,563		'	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	630		'	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	220		'	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	41,837		'	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	122		'	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	558		'	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	23		'	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	92		'	70		'	'	'
Derivative assets before netting	557		'	515		'	'	'
Available-for-sale securities	783		'	847		'	'	'
Mortgage loans held for sale	'		'	'		'	'	'
Mortgage servicing rights	2,461		'	2,680		'	'	'
Other assets	'		'	'		'	'	'
Total	3,801		'	4,042		'	'	'
Short-term borrowings	'		'	'		'	'	'
Total	92		'	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	426		'	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	284		'	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	64		'	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 And Collateral One [Member] | Fair Value, Measurements, Recurring [Member]	'		'	'		'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'	'
Derivative liabilities netting	-1,127		'	-1,192		'	'	'
Derivative assets netting	-670		'	-599		'	'	'
Available-for-sale securities	'		'	'		'	'	'
Mortgage loans held for sale	'		'	'		'	'	'
Mortgage servicing rights	'		'	'		'	'	'
Other assets	'		'	'		'	'	'
Total	-670		'	-599		'	'	'
Short-term borrowings	'		'	'		'	'	'
Total	-1,127		'	-1,192		'	'	'
Netting And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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 And Collateral One [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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 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	$447	$547	$478	$624
Net Gains (Losses) Included in Net Income	'	-2	'	-6
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	2	-4	14	4
Purchases	'	'	'	'
Sales	'	'	'	'
Principal Payments	-23	-41	-66	-122
Issuances	'	'	'	'
Settlements	'	'	'	'
End of Period Balance	426	500	426	500
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	2	-4	14	4
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	286	319	297	355
Net Gains (Losses) Included in Net Income	'	-3	-4	-11
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	6	-4	14	13
Purchases	'	'	'	'
Sales	'	'	'	-20
Principal Payments	-8	-9	-23	-34
Issuances	'	'	'	'
Settlements	'	'	'	'
End of Period Balance	284	303	284	303
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	6	-4	14	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	66	40	63	15
Net Gains (Losses) Included in Net Income	'	1	2	2
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	'	-2	1	-1
Purchases	'	3	4	28
Sales	'	'	'	'
Principal Payments	-2	-2	-6	-4
Issuances	'	'	'	'
Settlements	'	'	'	'
End of Period Balance	64	40	64	40
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	'	-2	1	-1
Corporate debt securities [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning of Period Balance	9	9	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	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	2,412	2,377	2,680	1,700
Net Gains (Losses) Included in Net Income	-61	11	-345	196
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	'	'	'	'
Purchases	1	2	3	7
Sales	'	'	-141	'
Principal Payments	'	'	'	'
Issuances	109	187	264	674
Settlements	'	'	'	'
End of Period Balance	2,461	2,577	2,461	2,577
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	-61	11	-345	196
Derivative [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning of Period Balance	558	423	445	1,179
Net Gains (Losses) Included in Net Income	95	182	568	-34
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	'	'	'	'
Purchases	'	'	1	1
Sales	-1	-2	-1	-4
Principal Payments	'	'	'	'
Issuances	'	'	'	'
Settlements	-187	14	-548	-525
End of Period Balance	465	617	465	617
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	-15	55	80	-218
Available-for-Sale Securities [Member]	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Beginning of Period Balance	808	915	847	1,003
Net Gains (Losses) Included in Net Income	'	-4	-2	-15
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	8	-10	29	16
Purchases	'	3	4	28
Sales	'	'	'	-20
Principal Payments	-33	-52	-95	-160
Issuances	'	'	'	'
Settlements	'	'	'	'
End of Period Balance	783	852	783	852
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	$8	($10)	$29	$17

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		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 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	$7	$89	$215	($122)
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	-65	-28	30	-301
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	88	93	353	88
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	50	83	50	83
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	'	-3	'	-13
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)	'	($2)

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 $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Loans	$142	$128
Other assets	84	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	142	128
Other assets	$84	$150

Recovered_Sheet8

Fair Values of Assets and Liabilities - Losses Recognized Related to Nonrecurring Fair Value Measurements of Individual Assets or Portfolios (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Loans Receivable [Member]	'	'	'	'
Fair Value Assets Measured On Nonrecurring Basis Losses Recognized [Line Items]	'	'	'	'
Asset impairment charges	$21	$22	$68	$55
Other Assets [Member]	'	'	'	'
Fair Value Assets Measured On Nonrecurring Basis Losses Recognized [Line Items]	'	'	'	'
Asset impairment charges	$17	$14	$51	$73

Recovered_Sheet9

Fair Values of Assets and Liabilities - Differences Between Aggregate Fair Value, Carrying Amount of MLHFS and Aggregate Unpaid Principal Amount (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Fair value carrying amount, total loans	$3,918	$3,263
Fair value carrying amount, nonaccrual loans	8	9
Fair value carrying amount, loans 90 days or more past due	2	'
Aggregate unpaid principal, total loans	3,784	3,195
Aggregate unpaid principal, nonaccrual loans	12	14
Aggregate unpaid principal, loans 90 days or more past due	2	'
Carrying amount over (under) unpaid principal, total loans	134	68
Carrying amount over (under) unpaid principal, nonaccrual loans	-4	-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 $)	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Financial Assets	'		'		'	'
Cash and due from banks	$6,183		$8,477		$11,615	$8,252
Investment securities held-to-maturity	44,231	[1]	38,920	[1]	'	'
Financial Liabilities	'		'		'	'
Deposits	273,097		262,123		'	'
Long-term debt	30,768		20,049		'	'
Carrying Amount [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	6,183		8,477		'	'
Federal funds sold and securities purchased under resale agreements	168		163		'	'
Investment securities held-to-maturity	44,231		38,920		'	'
Loans held for sale	21		5		'	'
Loans	241,384		230,857		'	'
Other financial instruments	2,227		2,443		'	'
Financial Liabilities	'		'		'	'
Deposits	273,097		262,123		'	'
Short-term borrowings	29,277		26,945		'	'
Long-term debt	30,768		20,049		'	'
Other Liabilities	1,307		1,263		'	'
Fair Value [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	6,183		8,477		'	'
Federal funds sold and securities purchased under resale agreements	168		163		'	'
Investment securities held-to-maturity	44,094		38,368		'	'
Loans held for sale	21		5		'	'
Loans	243,700		231,480		'	'
Other financial instruments	2,233		2,463		'	'
Financial Liabilities	'		'		'	'
Deposits	273,147		262,200		'	'
Short-term borrowings	29,134		26,863		'	'
Long-term debt	31,220		20,391		'	'
Other Liabilities	1,307		1,263		'	'
Fair Value [Member] | Level 1 [Member]	'		'		'	'
Financial Assets	'		'		'	'
Cash and due from banks	6,183		8,477		'	'
Federal funds sold and securities purchased under resale agreements	'		'		'	'
Investment securities held-to-maturity	1,905		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	168		163		'	'
Investment securities held-to-maturity	42,093		35,678		'	'
Loans held for sale	'		'		'	'
Loans	'		'		'	'
Other financial instruments	944		1,080		'	'
Financial Liabilities	'		'		'	'
Deposits	273,147		262,200		'	'
Short-term borrowings	29,134		26,863		'	'
Long-term debt	31,220		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	96		101		'	'
Loans held for sale	21		5		'	'
Loans	243,700		231,480		'	'
Other financial instruments	1,289		1,383		'	'
Financial Liabilities	'		'		'	'
Deposits	'		'		'	'
Short-term borrowings	'		'		'	'
Long-term debt	'		'		'	'
Other Liabilities	$1,307		$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 $)	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Jun. 30, 2014
Share data in Millions, unless otherwise specified							Merchant processing [Member]	Asset sales [Member]	Asset sales [Member]	Visa Class B [Member]	Visa Class B [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Liability related to remaining Visa Litigation, carrying amount	$19,000,000	'	'	'	'	'	'	'	'	'	'
Number of shares sold	'	'	'	'	'	'	'	'	'	0.4	3
Remaining shares held by the Company	'	'	'	'	'	'	'	'	'	9.2	'
Value of airline tickets purchased to deliver at future date	'	'	'	'	'	'	6,800,000,000	'	'	'	'
Company held collateral in escrow deposits, letters of credit and indemnities from financial institutions and liens on various assets	'	'	'	'	'	'	648,000,000	'	'	'	'
Representation and warranty reserve	62,000,000	69,000,000	83,000,000	176,000,000	190,000,000	240,000,000	'	62,000,000	83,000,000	'	'
Unresolved representation and warranty claims	'	'	'	'	'	'	'	$29,000,000	$89,000,000	'	'

Guarantees_and_Contingent_Liab3

Guarantees and Contingent Liabilities - Summary of Other Guarantees and Contingent Liabilities (Detail) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Standby letters of credit [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	63
Maximum Potential Future Payments	15,201
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	5,166
Carrying Amount	'
Maximum Potential Future Payments	5,002
Asset sales [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	160
Maximum Potential Future Payments	4,040
Merchant processing [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	780
Carrying Amount	66
Maximum Potential Future Payments	92,835
Contingent consideration arrangements [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	2
Maximum Potential Future Payments	2
Tender option bond program guarantee [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	4,079
Carrying Amount	'
Maximum Potential Future Payments	3,915
Minimum revenue guarantees [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	7
Maximum Potential Future Payments	7
Other [Member]	'
Guarantor Obligations [Line Items]	'
Collateral Held	'
Carrying Amount	'
Maximum Potential Future Payments	$525

Guarantees_and_Contingent_Liab4

Guarantees and Contingent Liabilities - Representation and Warranty Reserve Rollforward (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Valuation and Qualifying Accounts [Abstract]	'	'	'	'
Representation and Warranty Reserve, Beginning Balance	$69	$190	$83	$240
Net realized losses	-1	-13	-13	-52
Change in reserve	-6	-1	-8	-12
Representation and Warranty Reserve, Ending Balance	$62	$176	$62	$176