U.S. Bancorp (USB) 10-K 27 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	USB
Entity Registrant Name	US BANCORP \DE\
Entity Central Index Key	36104
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		1,781,189,381
Entity Public Float			$78.40

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Assets
Cash and due from banks	$10,654		$8,477
Investment securities
Held-to-maturity (fair value $45,140 and $38,368, respectively; including $526 and $994 at fair value pledged as collateral, respectively)	44,974	[1]	38,920	[1]
Available-for-sale ($330 and $1,106 pledged as collateral, respectively)	56,069	[1]	40,935	[1]
Loans held for sale (including $4,774 and $3,263 of mortgage loans carried at fair value, respectively)	4,792		3,268
Loans
Commercial	80,377		70,033
Commercial real estate	42,795		39,885
Residential mortgages	51,619		51,156
Credit card	18,515		18,021
Other retail	49,264		47,678
Total loans, excluding covered loans	242,570		226,773
Covered loans	5,281		8,462
Total loans	247,851		235,235
Less allowance for loan losses	-4,039		-4,250
Net loans	243,812		230,985
Premises and equipment	2,618		2,606
Goodwill	9,389		9,205
Other intangible assets	3,162		3,529
Other assets (including $157 and $111 of trading securities at fair value pledged as collateral, respectively)	27,059	[1]	26,096	[1]
Total assets	402,529		364,021
Deposits
Noninterest-bearing	77,323		76,941
Interest-bearing	177,452		156,165
Time deposits greater than $100,000	27,958	[2]	29,017	[2]
Total deposits	282,733		262,123
Short-term borrowings	29,893		27,608
Long-term debt	32,260		20,049
Other liabilities	13,475		12,434
Total liabilities	358,361		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: 2014 and 2013 - 2,125,725,742 shares	21		21
Capital surplus	8,313		8,216
Retained earnings	42,530		38,667
Less cost of common stock in treasury: 2014 - 339,859,034 shares; 2013 - 300,977,274 shares	-11,245		-9,476
Accumulated other comprehensive income (loss)	-896		-1,071
Total U.S. Bancorp shareholders' equity	43,479		41,113
Noncontrolling interests	689		694
Total equity	44,168		41,807
Total liabilities and equity	$402,529		$364,021
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.
[2]	Includes domestic time deposit balances greater than $250,000 of $5.0 billion and $3.1 billion at December 31, 2014 and 2013, respectively.

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Held-to-maturity securities, fair value	$45,140,000,000	$38,368,000,000
Securities, pledged as collateral	856,000,000	2,100,000,000
Mortgage loans, carried at fair value	4,774,000,000	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)	339,859,034	300,977,274
Time deposits greater than 250,000	5,000,000,000	3,100,000,000
Held-to-maturity Securities [Member]
Securities, pledged as collateral	526,000,000	994,000,000
Available-for-Sale Securities [Member]
Securities, pledged as collateral	330,000,000	1,106,000,000
Trading Securities [Member]
Securities, pledged as collateral	$157,000,000	$111,000,000

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Income
Loans	$10,113	$10,277	$10,558
Loans held for sale	128	203	282
Investment securities	1,866	1,631	1,792
Other interest income	121	174	251
Total interest income	12,228	12,285	12,883
Interest Expense
Deposits	465	561	691
Short-term borrowings	263	353	442
Long-term debt	725	767	1,005
Total interest expense	1,453	1,681	2,138
Net interest income	10,775	10,604	10,745
Provision for credit losses	1,229	1,340	1,882
Net interest income after provision for credit losses	9,546	9,264	8,863
Noninterest Income
Credit and debit card revenue	1,021	965	892
Corporate payment products revenue	724	706	744
Merchant processing services	1,511	1,458	1,395
ATM processing services	321	327	346
Trust and investment management fees	1,252	1,139	1,055
Deposit service charges	693	670	653
Treasury management fees	545	538	541
Commercial products revenue	854	859	878
Mortgage banking revenue	1,009	1,356	1,937
Investment products fees	191	178	150
Securities gains (losses), net
Realized gains (losses), net	11	23	59
Total other-than-temporary impairment	-7	-6	-62
Portion of other-than-temporary impairment recognized in other comprehensive income	-1	-8	-12
Total securities gains (losses), net	3	9	-15
Other	1,040	569	743
Total noninterest income	9,164	8,774	9,319
Noninterest Expense
Compensation	4,523	4,371	4,320
Employee benefits	1,041	1,140	945
Net occupancy and equipment	987	949	917
Professional services	414	381	530
Marketing and business development	382	357	388
Technology and communications	863	848	821
Postage, printing and supplies	328	310	304
Other intangibles	199	223	274
Other	1,978	1,695	1,957
Total noninterest expense	10,715	10,274	10,456
Income before income taxes	7,995	7,764	7,726
Applicable income taxes	2,087	2,032	2,236
Net income	5,908	5,732	5,490
Net (income) loss attributable to noncontrolling interests	-57	104	157
Net income attributable to U.S. Bancorp	5,851	5,836	5,647
Net income applicable to U.S. Bancorp common shareholders	$5,583	$5,552	$5,383
Earnings per common share	$3.10	$3.02	$2.85
Diluted earnings per common share	$3.08	$3	$2.84
Dividends declared per common share	$0.97	$0.89	$0.78
Average common shares outstanding	1,803	1,839	1,887
Average diluted common shares outstanding	1,813	1,849	1,896

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$5,908	$5,732	$5,490
Other Comprehensive Income (Loss)
Changes in unrealized gains and losses on securities available-for-sale	764	-1,223	715
Other-than-temporary impairment not recognized in earnings on securities available-for-sale	1	8	12
Changes in unrealized gains and losses on derivative hedges	-41	37	-74
Foreign currency translation	-4	-34	14
Changes in unrealized gains and losses on retirement plans	-733	590	-543
Reclassification to earnings of realized gains and losses	297	373	325
Income taxes related to other comprehensive income	-109	101	-172
Total other comprehensive income (loss)	175	-148	277
Comprehensive income	6,083	5,584	5,767
Comprehensive (income) loss attributable to noncontrolling interests	-57	104	157
Comprehensive income attributable to U.S. Bancorp	$6,026	$5,688	$5,924

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders' Equity (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, 2011	$34,971	$21	$2,606	$8,238	$30,785	($6,472)	($1,200)	$33,978	$993
Shares, Beginning Balance at Dec. 31, 2011		1,910
Net income (loss)	5,490				5,647			5,647	-157
Other comprehensive income (loss)	277						277	277
Preferred stock dividends	-238				-238			-238
Common stock dividends	-1,474				-1,474			-1,474
Issuance of preferred stock	2,163		2,163					2,163
Issuance of common and treasury stock	441			-119		560		441
Issuance of common and treasury stock, shares		18
Purchase of treasury stock	-1,878					-1,878		-1,878
Purchase of treasury stock, shares	-59	-59
Distributions to noncontrolling interests	-76								-76
Net other changes in noncontrolling interests	509								509
Stock option and restricted stock grants	82			82				82
Ending Balance at Dec. 31, 2012	40,267	21	4,769	8,201	34,720	-7,790	-923	38,998	1,269
Shares, Ending Balance at Dec. 31, 2012		1,869
Net income (loss)	5,732				5,836			5,836	-104
Other comprehensive income (loss)	-148						-148	-148
Redemption of preferred stock	-500		-500	8	-8			-500
Preferred stock dividends	-250				-250			-250
Common stock dividends	-1,631				-1,631			-1,631
Issuance of preferred stock	487		487					487
Issuance of common and treasury stock	550			-100		650		550
Issuance of common and treasury stock, shares		21
Purchase of treasury stock	-2,336					-2,336		-2,336
Purchase of treasury stock, shares	-65	-65
Distributions to noncontrolling interests	-62								-62
Net other changes in noncontrolling interests	-409								-409
Stock option and restricted stock grants	107			107				107
Ending Balance at Dec. 31, 2013	41,807	21	4,756	8,216	38,667	-9,476	-1,071	41,113	694
Shares, Ending Balance at Dec. 31, 2013	1,800	1,825
Net income (loss)	5,908				5,851			5,851	57
Other comprehensive income (loss)	175						175	175
Preferred stock dividends	-243				-243			-243
Common stock dividends	-1,745				-1,745			-1,745
Issuance of common and treasury stock	480			-13		493		480
Issuance of common and treasury stock, shares		15
Purchase of treasury stock	-2,262					-2,262		-2,262
Purchase of treasury stock, shares	-54	-54
Distributions to noncontrolling interests	-59								-59
Net other changes in noncontrolling interests	-3								-3
Stock option and restricted stock grants	110			110				110
Ending Balance at Dec. 31, 2014	$44,168	$21	$4,756	$8,313	$42,530	($11,245)	($896)	$43,479	$689
Shares, Ending Balance at Dec. 31, 2014	1,800	1,786

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities
Net income attributable to U.S. Bancorp	$5,851	$5,836	$5,647
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	1,229	1,340	1,882
Depreciation and amortization of premises and equipment	302	297	287
Amortization of intangibles	199	223	274
(Gain) loss on sale of loans held for sale	-801	-1,044	-2,889
(Gain) loss on sale of securities and other assets	-595	-74	-242
Loans originated for sale in the secondary market, net of repayments	-30,858	-56,698	-81,219
Proceeds from sales of loans held for sale	29,962	61,681	82,302
Other, net	43	-115	1,916
Net cash provided by operating activities	5,332	11,446	7,958
Investing Activities
Proceeds from sales of available-for-sale investment securities	475	947	2,060
Proceeds from maturities of held-to-maturity investment securities	9,479	8,587	6,336
Proceeds from maturities of available-for-sale investment securities	7,212	10,147	15,374
Purchases of held-to-maturity investment securities	-15,597	-13,218	-10,247
Purchases of available-for-sale investment securities	-21,752	-13,146	-16,605
Net increase in loans outstanding	-12,873	-12,331	-15,158
Proceeds from sales of loans	1,657	819	1,895
Purchases of loans	-2,355	-2,468	-2,741
Acquisitions, net of cash acquired	3,436	-58	94
Other, net	506	-303	-1,261
Net cash (used in) provided by financing activities	-29,812	-21,024	-20,253
Financing Activities
Net increase in deposits	15,822	12,940	18,050
Net increase (decrease) in short-term borrowings	2,285	1,306	-4,167
Proceeds from issuance of long-term debt	16,394	2,041	4,966
Principal payments or redemption of long-term debt	-4,128	-2,883	-11,415
Proceeds from issuance of preferred stock		487	2,163
Proceeds from issuance of common stock	453	524	395
Redemption of preferred stock		-500
Repurchase of common stock	-2,200	-2,282	-1,856
Cash dividends paid on preferred stock	-243	-254	-204
Cash dividends paid on common stock	-1,726	-1,576	-1,347
Net cash provided by financing activities	26,657	9,803	6,585
Change in cash and due from banks	2,177	225	-5,710
Cash and due from banks at beginning of period	8,477	8,252	13,962
Cash and due from banks at end of period	10,654	8,477	8,252
Supplemental Cash Flow Disclosures
Cash paid for income taxes	748	812	1,469
Cash paid for interest	1,476	1,759	2,218
Net noncash transfers to foreclosed property	199	323	564
Noncash transfer of investment securities available-for-sale to held-to-maturity			11,705
Acquisitions
Assets (sold) acquired	1,376	126	194
Liabilities sold (assumed)	-4,797	-24	-260
Net	($3,421)	$102	($66)

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Significant Accounting Policies	NOTE 1    SIGNIFICANT ACCOUNTING POLICIES
	U.S. Bancorp is a multi-state financial services holding company headquartered in Minneapolis, Minnesota. U.S. Bancorp and its subsidiaries (the “Company”) provide a full range of financial services, including lending and depository services through banking offices principally in the Midwest and West regions of the United States. The Company also engages in credit card, merchant, and ATM processing, mortgage banking, insurance, trust and investment management, brokerage, and leasing activities, principally in domestic markets.
	Basis of Presentation The consolidated financial statements include the accounts of the Company and its subsidiaries and all variable interest entities (“VIEs”) for which the Company has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or right to receive benefits of the VIE that could potentially be significant to the VIE. Consolidation eliminates all significant intercompany accounts and transactions. Certain items in prior periods have been reclassified to conform to the current presentation.
	Uses of Estimates The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual experience could differ from those estimates.
	BUSINESS SEGMENTS
	Within the Company, financial performance is measured by major lines of business based on the products and services provided to customers through its distribution channels. The Company has five reportable operating segments:
	Wholesale Banking and Commercial Real Estate Wholesale Banking and Commercial Real Estate offers lending, equipment finance and small-ticket leasing, depository services, treasury management, capital markets, international trade services and other financial services to middle market, large corporate, commercial real estate, financial institution, non-profit and public sector clients.
	Consumer and Small Business Banking Consumer and Small Business Banking delivers products and services through banking offices, telephone servicing and sales, on-line services, direct mail, ATM processing and mobile devices, such as mobile phones and tablet computers. It encompasses community banking, metropolitan banking, in-store banking, small business banking, consumer lending, workplace banking, student banking and 24-hour banking (collectively, the retail banking division), as well as mortgage banking.
	Wealth Management and Securities Services Wealth Management and Securities Services provides private banking, financial advisory services, investment management, retail brokerage services, insurance, trust, custody and fund servicing through five businesses: Wealth Management, Corporate Trust Services, U.S. Bancorp Asset Management, Institutional Trust & Custody and Fund Services.
	Payment Services Payment Services includes consumer and business credit cards, stored-value cards, debit cards, corporate, government and purchasing card services, consumer lines of credit and merchant processing.
	Treasury and Corporate Support Treasury and Corporate Support includes the Company’s investment portfolios, most covered commercial and commercial real estate loans and related other real estate owned (“OREO”), funding, capital management, interest rate risk management, the net effect of transfer pricing related to average balances, income taxes not allocated to business lines, including most investments in tax-advantaged projects, and the residual aggregate of those expenses associated with corporate activities that are managed on a consolidated basis.
	Segment Results Accounting policies for the lines of business are 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 allocate funding costs and benefits, expenses and other financial elements to each line of business. For details of these methodologies and segment results, see “Basis for Financial Presentation” and Table 24 “Line of Business Financial Performance” included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements.
	SECURITIES
	Realized gains or losses on securities are determined on a trade date basis based on the specific amortized cost of the investments sold.
	Trading Securities Debt and equity securities held for resale are classified as trading securities and are included in other assets and reported at fair value. Changes in fair value and realized gains or losses are reported in noninterest income.
	Available-for-sale Securities These securities are not trading securities but may be sold before maturity in response to changes in the Company’s interest rate risk profile, funding needs, demand for collateralized deposits by public entities or other reasons. Available-for-sale securities are carried at fair value with unrealized net gains or losses reported within other comprehensive income (loss) in shareholders’ equity. Declines in fair value for credit-related other-than-temporary impairment, if any, are reported in noninterest income.
	Held-to-maturity Securities Debt securities for which the Company has the positive intent and ability to hold to maturity are reported at historical cost adjusted for amortization of premiums and accretion of discounts. Declines in fair value for credit-related other-than-temporary impairment, if any, are reported in noninterest income.
	Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase Securities purchased under agreements to resell and securities sold under agreements to repurchase are accounted for as collateralized financing transactions with a receivable or payable recorded at the amounts at which the securities were acquired or sold, plus accrued interest. Collateral requirements are continually monitored and additional collateral is received or provided as required. The Company records a receivable or payable for cash collateral paid or received.
	EQUITY INVESTMENTS IN OPERATING ENTITIES
	Equity investments in public entities in which the Company’s ownership is less than 20 percent are generally accounted for as available-for-sale securities and are carried at fair value. Similar investments in private entities are accounted for using the cost method. Investments in entities where the Company has a significant influence (generally between 20 percent and 50 percent ownership), but does not control the entity, are accounted for using the equity method. Investments in limited partnerships and limited liability companies where the Company’s ownership interest is greater than 5 percent are accounted for using the equity method. All equity investments are evaluated for impairment at least annually and more frequently if certain criteria are met.
	LOANS
	The Company offers a broad array of lending products and categorizes its loan portfolio into three segments, which is the level at which it develops and documents a systematic methodology to determine the allowance for credit losses. The Company’s three loan portfolio segments are commercial lending, consumer lending and covered loans. The Company further disaggregates its loan portfolio segments into various classes based on their underlying risk characteristics. The two classes within the commercial lending segment are commercial loans and commercial real estate loans. The three classes within the consumer lending segment are residential mortgages, credit card loans and other retail loans. The covered loan segment consists of only one class.
	The Company’s accounting methods for loans differ depending on whether the loans are originated or purchased, and for purchased loans, whether the loans were acquired at a discount related to evidence of credit deterioration since date of origination.
	Originated Loans Held for Investment Loans the Company originates as held for investment are reported at the principal amount outstanding, net of unearned income, net deferred loan fees or costs, and any direct principal charge-offs. Interest income is accrued on the unpaid principal balances as earned. Loan and commitment fees and certain direct loan origination costs are deferred and recognized over the life of the loan and/or commitment period as yield adjustments.
	Purchased Loans All purchased loans (non-impaired and impaired) acquired after January 1, 2009 are initially measured at fair value as of the acquisition date in accordance with applicable authoritative accounting guidance. Credit discounts are included in the determination of fair value. An allowance for credit losses is not recorded at the acquisition date for loans purchased after January 1, 2009. In accordance with applicable authoritative accounting guidance, purchased non-impaired loans acquired in a business combination prior to January 1, 2009 were generally recorded at the predecessor’s carrying value including an allowance for credit losses.
	In determining the acquisition date fair value of purchased impaired loans, and in subsequent accounting, the Company generally aggregates purchased consumer loans and certain smaller balance commercial loans into pools of loans with common risk characteristics, while accounting for larger balance commercial loans individually. Expected cash flows at the purchase date in excess of the fair value of loans are recorded as interest income over the life of the loans if the timing and amount of the future cash flows is reasonably estimable. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. The present value of any decreases in expected cash flows, other than from decreases in variable interest rates, after the purchase date is recognized by recording an allowance for credit losses. Revolving loans, including lines of credit and credit cards loans, and leases are excluded from purchased impaired loans accounting.
	For purchased loans acquired after January 1, 2009 that are not deemed impaired at acquisition, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value. Subsequent to the purchase date, the methods utilized to estimate the required allowance for credit losses for these loans is similar to originated loans; however, the Company records a provision for credit losses only when the required allowance exceeds any remaining credit discounts. The remaining differences between the purchase price and the unpaid principal balance at the date of acquisition are recorded in interest income over the life of the loans.
	Covered Assets Loans covered under loss sharing or similar credit protection agreements with the Federal Deposit Insurance Corporation (“FDIC”) are reported in loans along with the related indemnification asset. Foreclosed real estate covered under similar agreements is recorded in other assets. In accordance with applicable authoritative accounting guidance effective for the Company beginning January 1, 2009, all purchased loans and related indemnification assets are recorded at fair value at the date of purchase.
	Effective January 1, 2013, the Company amortizes any reduction in expected cash flows from the FDIC resulting from increases in expected cash flows from the covered assets (when there are no previous valuation allowances to reverse) over the shorter of the remaining contractual term of the indemnification agreements or the remaining life of the covered assets. Prior to January 1, 2013, the Company considered such increases in expected cash flows of purchased loans and decreases in expected cash flows of the FDIC indemnification assets together and recognized them over the remaining life of the loans.
	Commitments to Extend Credit Unfunded commitments for residential mortgage loans intended to be held for sale are considered derivatives and recorded on the balance sheet at fair value with changes in fair value recorded in income. All other unfunded loan commitments are not considered derivatives and are not reported on the balance sheet. For loans purchased after January 1, 2009, the fair value of the unfunded credit commitments is considered in the determination of the fair value of the loans recorded at the date of acquisition. Reserves for credit exposure on all other unfunded credit commitments are recorded in other liabilities.
	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 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 14-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 a loan’s carrying amount while a loan is on nonaccrual and are recognized as interest income upon payoff of the loan. However, 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, and those loans are classified as nonaccrual loans with interest income 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.
	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, which is generally six months or greater. 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 all of the above 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 and continues to report them as TDRs after the trial period.
	Credit card and other retail loan TDRs 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.
	Impaired 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.
	Leases The Company’s lease portfolio includes both direct financing and leveraged leases. The net investment in direct financing leases is the sum of all minimum lease payments and estimated residual values, less unearned income. Unearned income is recorded in interest income over the terms of the leases to produce a level yield.
	The investment in leveraged leases is the sum of all lease payments, less nonrecourse debt payments, plus estimated residual values, less unearned income. Income from leveraged leases is recognized over the term of the leases based on the unrecovered equity investment.
	Residual values on leased assets are reviewed regularly for other-than-temporary impairment. Residual valuations for retail automobile leases are based on independent assessments of expected used car sale prices at the end-of-term. Impairment tests are conducted based on these valuations considering the probability of the lessee returning the asset to the Company, re-marketing efforts, insurance coverage and ancillary fees and costs. Valuations for commercial leases are based upon external or internal management appraisals. When there is impairment of the Company’s interest in the residual value of a leased asset, the carrying value is reduced to the estimated fair value with the writedown recognized in the current period.
	Other Real Estate OREO is included in other assets, and is property acquired through foreclosure or other proceedings on defaulted loans. OREO is initially recorded at fair value, less estimated selling costs. OREO is evaluated regularly and any decreases in value along with holding costs, such as taxes and insurance, are reported in noninterest expense.
	LOANS HELD FOR SALE
	Loans held for sale (“LHFS”) represent mortgage loans intended to be sold in the secondary market and other loans that management has an active plan to sell. LHFS are carried at the lower-of-cost-or-fair value as determined on an aggregate basis by type of loan with the exception of loans for which the Company has elected fair value accounting, which are carried at fair value. The credit component of any writedowns upon the transfer of loans to LHFS is reflected in loan charge-offs.
	Where an election is made to carry the LHFS at fair value, any change in fair value is recognized in noninterest income. Where an election is made to carry LHFS at lower-of-cost-or-fair value, any further decreases are recognized in noninterest income and increases in fair value are not recognized until the loans are sold. Fair value elections are made at the time of origination or purchase based on the Company’s fair value election policy. The Company has elected fair value accounting for substantially all its mortgage loans held for sale.
	DERIVATIVE FINANCIAL 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. Derivative instruments are reported in other assets or other liabilities at fair value. Changes in a derivative’s fair value are recognized currently in earnings unless specific hedge accounting criteria are met.
	All derivative instruments that qualify and are designated for hedge accounting are recorded at fair value and classified 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”); or a hedge of the volatility of an investment in foreign operations driven by changes in foreign currency exchange rates (“net investment hedge”). Changes in the fair value of a derivative that is highly effective and designated as a fair value hedge, and the offsetting changes in the fair value of the hedged item, are recorded in earnings. Changes in the fair value of a derivative that is highly effective and designated as a cash flow hedge are recorded in other comprehensive income (loss) until cash flows of the hedged item are realized. Any change in fair value resulting from hedge ineffectiveness is immediately recorded in noninterest income. Changes in the fair value of net investment hedges that are highly effective are recorded in other comprehensive income (loss). 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).
	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).
REVENUE RECOGNITION
The Company recognizes revenue as it is earned based on contractual terms, as transactions occur, or as services are provided and collectability is reasonably assured. In certain circumstances, noninterest income is reported net of associated expenses that are directly related to variable volume-based sales or revenue sharing arrangements or when the Company acts on an agency basis for others. Certain specific policies include the following:
Credit and Debit Card Revenue Credit and debit card revenue includes interchange from consumer credit and debit cards processed through card association networks, annual fees, and other transaction and account management fees. Interchange rates are generally set by the credit card associations and based on purchase volumes and other factors. The Company records interchange as transactions occur. Transaction and account management fees are recognized as transactions occur or services are provided, except for annual fees which are recognized over the applicable period. Volume-related payments to partners and credit card associations and costs for rewards programs are also recorded within credit and debit card revenue when earned by the partner or customer.
Corporate Payment Products Revenue Corporate payment products revenue primarily includes interchange from corporate and purchasing cards processed through card association networks and revenue from proprietary network transactions. The Company records corporate payment products revenue as transactions occur. Volume-related payments to customers and credit card associations are also recorded within corporate payment products revenue when earned by the customer or card association.
Merchant Processing Services Merchant processing services revenue consists principally of merchant discount and other transaction and account management fees charged to merchants for the electronic processing of card association network transactions, net of interchange paid to the card-issuing bank, card association assessments, and revenue sharing amounts. All of these are recognized at the time the merchant’s transactions are processed or other services are performed. The Company may enter into revenue sharing agreements with referral partners or in connection with purchases of merchant contracts from sellers. The revenue sharing amounts are determined primarily on sales volume processed or revenue generated for a particular group of merchants. Merchant processing revenue also includes revenues related to point-of-sale equipment recorded as sales when the equipment is shipped or as earned for equipment rentals.
Trust and Investment Management Fees Trust and investment management fees are recognized over the period in which services are performed and are based on a percentage of the fair value of the assets under management or administration, fixed based on account type, or transaction-based fees.
Deposit Service Charges Service charges on deposit accounts are primarily monthly fees based on minimum balances or transaction-based fees. These fees are recognized as earned or as transactions occur and services are provided.
Commercial Products Revenue Commercial products revenue primarily includes revenue related to ancillary services provided to Wholesale Banking and Commercial Real Estate customers including standby letter of credit fees, non-yield related loan fees, capital markets related revenue and non-yield related leasing revenue. These fees are recognized as earned or as transactions occur and services are provided.
Mortgage Banking Revenue Mortgage banking revenue includes revenue derived from mortgages originated and subsequently sold, generally with servicing retained. The primary components include: gains and losses on mortgage sales; servicing revenue; changes in fair value for mortgage loans originated with the intent to sell and measured at fair value under the fair value option; changes in fair value for derivative commitments to purchase and originate mortgage loans; changes in the fair value of mortgage servicing rights (“MSRs”); and the impact of risk management activities associated with the mortgage origination pipeline, funded loans and MSRs. Net interest income from mortgage loans is recorded in interest income. Refer to Other Significant Policies in Note 1, as well as Note 10 and Note 22 for a further discussion of MSRs.
OTHER SIGNIFICANT POLICIES
Goodwill and Other Intangible Assets Goodwill is recorded on acquired businesses if the purchase price exceeds the fair value of the net assets acquired. Other intangible assets are recorded at their fair value upon completion of a business acquisition or certain other transactions, and generally represent the value of customer contracts or relationships. Goodwill is not amortized but is subject, at a minimum, to annual tests for impairment at a reporting unit level. In certain situations, an interim impairment test may be required if events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. Other intangible assets are amortized over their estimated useful lives, using straight-line and accelerated methods and are subject to impairment if events or circumstances indicate a possible inability to realize the carrying amount. Determining the amount of goodwill impairment, if any, includes assessing the current implied fair value of the reporting unit as if it were being acquired in a business combination and comparing it to the carrying amount of the reporting unit’s goodwill. Determining the amount of other intangible asset impairment, if any, includes assessing the present value of the estimated future cash flows associated with the intangible asset and comparing it to the carrying amount of the asset.
Income Taxes Deferred taxes are recorded to reflect the tax consequences on future years of differences between the tax basis of assets and liabilities and their financial reporting carrying amounts. The Company uses the deferral method of accounting on investments that generate investment tax credits. Under this method, the investment tax credits are recognized as a reduction to the related 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.
Mortgage Servicing Rights MSRs are capitalized as separate assets when loans are sold and servicing is retained or if they are purchased from others. MSRs are recorded at fair value. The Company determines the fair value by estimating the present value of the asset’s future cash flows utilizing market-based prepayment rates, discount rates, and other assumptions validated through comparison to trade information, industry surveys and independent third party valuations. Changes in the fair value of MSRs are recorded in earnings as mortgage banking revenue during the period in which they occur.
Pensions For purposes of its pension plans, the Company utilizes its fiscal year-end as the measurement date. At the measurement date, plan assets are determined based on fair value, generally representing observable market prices or the net asset value provided by the plans’ administrator. The actuarial cost method used to compute the pension liabilities and related expense is the projected unit credit method. The projected benefit obligation is principally determined based on the present value of projected benefit distributions at an assumed discount rate. The discount rate utilized is based on the investment yield of high quality corporate bonds available in the marketplace with maturities equal to projected cash flows of future benefit payments as of the measurement date. Periodic pension expense (or income) includes service costs, interest costs based on the assumed discount rate, the expected return on plan assets based on an actuarially derived market-related value and amortization of actuarial gains and losses. Pension accounting reflects the long-term nature of benefit obligations and the investment horizon of plan assets, and can have the effect of reducing earnings volatility related to short-term changes in interest rates and market valuations. Actuarial gains and losses include the impact of plan amendments and various unrecognized gains and losses which are deferred and amortized over the future service periods of active employees. The market-related value utilized to determine the expected return on plan assets is based on fair value adjusted for the difference between expected returns and actual performance of plan assets. The unrealized difference between actual experience and expected returns is included in expense over a period of approximately twelve years. The overfunded or underfunded status of the plans is recorded as an asset or liability on the Consolidated Balance Sheet, with changes in that status recognized through other comprehensive income (loss).
Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation and depreciated primarily on a straight-line basis over the estimated life of the assets. Estimated useful lives range up to 40 years for newly constructed buildings and from 3 to 20 years for furniture and equipment.
Capitalized leases, less accumulated amortization, are included in premises and equipment. Capitalized lease obligations are included in long-term debt. Capitalized leases are amortized on a straight-line basis over the lease term and the amortization is included in depreciation expense.
Stock-Based Compensation The Company grants stock-based awards, including restricted stock, restricted stock units and options to purchase common stock of the Company. Stock option grants are for a fixed number of shares to employees and directors with an exercise price equal to the fair value of the shares at the date of grant. Restricted stock and restricted stock unit grants are awarded at no cost to the recipient. Stock-based compensation for awards is recognized in the Company’s results of operations on a straight-line basis over the vesting period. The Company immediately recognizes compensation cost of awards to employees that meet retirement status, despite their continued active employment. The amortization of stock-based compensation reflects estimated forfeitures adjusted for actual forfeiture experience. As compensation expense is recognized, a deferred tax asset is recorded that represents an estimate of the future tax deduction from exercise or release of restrictions. At the time stock-based awards are exercised, cancelled, expire, or restrictions are released, the Company may be required to recognize an adjustment to tax expense, depending on the market price of the Company’s common stock at that time.
Per Share Calculations Earnings per common share is calculated by dividing net income applicable to U.S. Bancorp common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share is calculated by adjusting income and outstanding shares, assuming conversion of all potentially dilutive securities.

Accounting_Changes

Accounting Changes	12 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
Accounting Changes	NOTE 2    ACCOUNTING CHANGES
	Revenue Recognition In May 2014, the Financial Accounting Standards Board (“FASB”) 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.
	Consolidation In February 2015, the FASB issued accounting guidance, effective for the Company on January 1, 2016, with early adoption permitted, related to the analysis required by organizations to evaluate whether they should consolidate certain legal entities. The Company does not expect the adoption of this guidance to have a material impact on its financial statements.

Business_Combinations

Business Combinations	12 Months Ended
	Dec. 31, 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.
	In February 2013, the Company acquired Collective Point of Sale Solutions, a Canadian merchant processor. The Company recorded approximately $34 million of assets, including intangibles, and approximately $4 million of liabilities with this transaction.
	In November 2013, the Company acquired Quintillion Holding Company Limited, a provider of fund administration services to alternative investment funds. The Company recorded approximately $57 million of assets, including intangibles, and assumed approximately $10 million of liabilities with this transaction.

Restrictions_on_Cash_and_Due_f

Restrictions on Cash and Due from Banks	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Restrictions on Cash and Due from Banks	NOTE 4    RESTRICTIONS ON CASH AND DUE FROM BANKS
	The Federal Reserve Bank requires bank subsidiaries to maintain minimum average reserve balances, either in the form of cash or reserve balances held with the Federal Reserve Bank. The amount of those required reserve balances were approximately $2.0 billion and $1.8 billion at December 31, 2014 and 2013, respectively. At December 31, 2014 and 2013, the Company held $4.4 billion and $1.9 billion, respectively, of balances at the Federal Reserve Bank. These balances are included in cash and due from banks on the Consolidated Balance Sheet.

Investment_Securities

Investment Securities	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities	NOTE 5    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 at December 31 were as follows:
			2014																		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		$	2,717		$	15		$	–			$	(18	)		$	2,714			$	3,114			$	5		$	–		$	(79	)	$	3,040
	Mortgage-backed securities
	Residential
	Agency			42,204			335			–				(176	)			42,363				35,671				187			–			(665	)		35,193
	Non-agency non-prime(d)			1			–			–				–				1				1				–			–			–			1
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			7			–				–				7				–				9			–			–			9
	Other			13			4			–				–				17				16				4			(1	)		(1	)		18
	Obligations of state and political subdivisions			9			1			–				(1	)			9				12				–			–			–			12
	Obligations of foreign governments			9			–			–				–				9				7				–			–			–			7
	Other debt securities			21			–			–				(1	)			20				99				–			–			(11	)		88
	Total held-to-maturity		$	44,974		$	362		$	–			$	(196	)		$	45,140			$	38,920			$	205		$	(1	)	$	(756	)	$	38,368
	Available-for-sale(b)
	U.S. Treasury and agencies		$	2,622		$	14		$	–			$	(4	)		$	2,632			$	1,108			$	4		$	–		$	(67	)	$	1,045
	Mortgage-backed securities
	Residential
	Agency			44,668			593			–				(244	)			45,017				31,633				449			–			(529	)		31,553
	Non-agency
	Prime(c)			399			9			(2	)			(1	)			405				486				4			(8	)		(4	)		478
	Non-prime(d)			261			20			(1	)			–				280				297				5			(5	)		–			297
	Commercial agency			112			3			–				–				115				148				4			–			–			152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			18			4			–				–				22				20				4			–			–			24
	Other			607			13			–				(1	)			619				616				13			–			–			629
	Obligations of state and political subdivisions			5,604			265			–				(1	)			5,868				5,673				116			–			(51	)		5,738
	Obligations of foreign governments			6			–			–				–				6				6				–			–			–			6
	Corporate debt securities			690			3			–				(79	)			614				734				–			–			(94	)		640
	Perpetual preferred securities			200			27			–				(10	)			217				205				24			–			(17	)		212
	Other investments			245			29			–				–				274				133				28			–			–			161
	Total available-for-sale		$	55,432		$	980		$	(3	)		$	(340	)		$	56,069			$	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 4.3 years at December 31, 2014, compared with 6.0 years at December 31, 2013. The corresponding weighted-average yields were 2.32 percent and 2.64 percent, respectively. The weighted-average maturity of the held-to-maturity investment securities was 4.0 years at December 31, 2014, and 4.5 years at December 31, 2013. The corresponding weighted-average yields were 1.92 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 December 31, 2014, refer to Table 13 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 $12.6 billion at December 31, 2014, and $17.3 billion at December 31, 2013, were pledged to secure public, private and trust deposits, repurchase agreements and for other purposes required by contractual obligation or law. Included in these amounts were securities where the Company and certain counterparties have agreements granting the counterparties the right to sell or pledge the securities. Investment securities delivered under these types of arrangements had a fair value of $856 million at December 31, 2014, and $2.1 billion at December 31, 2013.
	The following table provides information about the amount of interest income from taxable and non-taxable investment securities:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Taxable		$	1,634		$	1,375		$	1,515
	Non-taxable			232			256			277
	Total interest income from investment securities		$	1,866		$	1,631		$	1,792
	The following table provides information about the amount of gross gains and losses realized through the sales of available-for-sale investment securities:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Realized gains		$	11		$	23		$	158
	Realized losses			–			–			(99	)
	Net realized gains (losses)		$	11		$	23		$	59
	Income tax (benefit) on net realized gains (losses)		$	4		$	9		$	23
	The Company conducts a regular assessment of its investment securities with unrealized losses to determine whether investment securities are other-than-temporarily impaired considering, among other factors, the nature of the investment securities, credit ratings or financial condition of the issuer, the extent and duration of the unrealized loss, expected cash flows of underlying collateral, the existence of any government or agency guarantees, market conditions and whether the Company intends to sell or it is more likely than not the Company will be required to sell the investment securities.
	The following table summarizes other-than-temporary impairment by investment category:
			2014												2013													2012
	Year Ended December 31 (Dollars in Millions)		Losses			Other Gains			Total						Losses				Other Gains				Total					Losses			Other Gains			Total
			Recorded in			(Losses)(c)									Recorded in				(Losses)(c)									Recorded in			(Losses)(c)
			Earnings												Earnings													Earnings
	Available-for-sale
Mortgage-backed securities
Non-agency residential
Prime(a)		$	(1	)	$	1		$	–					$	(6	)		$	2			$	(4	)			$	(12	)	$	(9	)	$	(21	)
Non-prime(b)			(2	)		–			(2	)					(8	)			6				(2	)				(33	)		21			(12	)
Commercial non-agency			–			–			–						–				–				–					(1	)		(1	)		(2	)
Other asset-backed securities			–			–			–						–				–				–					(1	)		1			–
Perpetual preferred securities			(5	)		–			(5	)					–				–				–					(27	)		–			(27	)
Total available-for-sale		$	(8	)	$	1		$	(7	)				$	(14	)		$	8			$	(6	)			$	(74	)	$	12		$	(62	)
(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 2014:
		Prime(a)												Non-Prime(b)
		Minimum			Maximum			Average						Minimum				Maximum				Average
Estimated lifetime prepayment rates			7	%		20	%		16	%					1	%			10	%			5	%
Lifetime probability of default rates			3			7			4						6				14				9
Lifetime loss severity rates			15			60			47						40				75				56
(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.
Changes in the credit losses on debt securities (excluding perpetual preferred securities) are summarized as follows:
Year Ended December 31 (Dollars in Millions)		2014			2013			2012
Balance at beginning of period		$	116		$	134		$	298
Additions to Credit Losses Due to Other-than-temporary Impairments
Credit losses on securities not previously considered other-than-temporarily impaired			–			–			6
Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized			3			14			41
Total other-than-temporary impairment on debt securities			3			14			47
Other Changes in Credit Losses
Increases in expected cash flows			(5	)		(2	)		(15	)
Realized losses(a)			(13	)		(23	)		(39	)
Credit losses on security sales and securities expected to be sold			–			(7	)		(157	)
Balance at end of period		$	101		$	116		$	134
(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 December 31, 2014, certain investment securities had a fair value below amortized cost. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at December 31, 2014:
		Less Than 12 Months								12 Months or Greater										Total
(Dollars in Millions)		Fair Value			Unrealized					Fair Value				Unrealized						Fair				Unrealized
					Losses									Losses						Value				Losses
Held-to-maturity
U.S. Treasury and agencies		$	184		$	(1	)			$	986			$	(17	)				$	1,170			$	(18	)
Residential agency mortgage-backed securities			5,276			(19	)				7,283				(157	)					12,559				(176	)
Other asset-backed securities			–			–					6				–						6				–
Obligations of state and political subdivisions			2			(1	)				–				–						2				(1	)
Other debt securities			–			–					20				(1	)					20				(1	)
Total held-to-maturity		$	5,462		$	(21	)			$	8,295			$	(175	)				$	13,757			$	(196	)
Available-for-sale
U.S. Treasury and agencies		$	100		$	–				$	741			$	(4	)				$	841			$	(4	)
Mortgage-backed securities
Residential
Agency			4,913			(31	)				8,203				(213	)					13,116				(244	)
Non-agency(a)
Prime(b)			106			(1	)				70				(2	)					176				(3	)
Non-prime(c)			17			–					21				(1	)					38				(1	)
Other asset-backed securities			4			–					23				(1	)					27				(1	)
Obligations of state and political subdivisions			53			(1	)				104				–						157				(1	)
Obligations of foreign governments			6			–					–				–						6				–
Corporate debt securities			–			–					429				(79	)					429				(79	)
Perpetual preferred securities			–			–					74				(10	)					74				(10	)
Total available-for-sale		$	5,199		$	(33	)			$	9,665			$	(310	)				$	14,864			$	(343	)
(a)	The Company has $4 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 December 31, 2014, the Company had no plans to sell investment securities with unrealized losses, and believes it is more likely than not it would not be required to sell such investment securities before recovery of their amortized cost.

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loans and Allowance for Credit Losses	NOTE 6	LOANS AND ALLOWANCE FOR CREDIT LOSSES
	The composition of the loan portfolio at December 31, disaggregated by class and underlying specific portfolio type, was as follows:
	(Dollars in Millions)		2014			2013
	Commercial
	Commercial		$	74,996		$	64,762
	Lease financing			5,381			5,271
	Total commercial			80,377			70,033
	Commercial Real Estate
	Commercial mortgages			33,360			32,183
	Construction and development			9,435			7,702
	Total commercial real estate			42,795			39,885
	Residential Mortgages
	Residential mortgages			38,598			37,545
	Home equity loans, first liens			13,021			13,611
	Total residential mortgages			51,619			51,156
	Credit Card			18,515			18,021
	Other Retail
	Retail leasing			5,871			5,929
	Home equity and second mortgages			15,916			15,442
	Revolving credit			3,309			3,276
	Installment			6,242			5,709
	Automobile			14,822			13,743
	Student			3,104			3,579
	Total other retail			49,264			47,678
	Total loans, excluding covered loans			242,570			226,773
	Covered Loans			5,281			8,462
	Total loans		$	247,851		$	235,235
	The Company had loans of $79.8 billion at December 31, 2014, and $77.2 billion at December 31, 2013, pledged at the Federal Home Loan Bank (“FHLB”), and loans of $61.8 billion at December 31, 2014, and $53.0 billion at December 31, 2013, pledged at the Federal Reserve Bank.
	The majority of the Company’s loans are to borrowers in the states in which it has Consumer and Small Business Banking offices. Collateral for commercial loans may include marketable securities, accounts receivable, inventory and equipment. For details of the Company’s commercial portfolio by industry group and geography as of December 31, 2014 and 2013, see Table 7 included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements.
	For detail of the Company’s commercial real estate portfolio by property type and geography as of December 31, 2014 and 2013, see Table 8 included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements. Such loans are collateralized by the related property. The Company has an equity interest in a joint venture, that it accounts for under the equity method, whose principal activities are to lend to entities that develop land, and construct and sell residential homes. The Company provides a warehousing line to this joint venture. Warehousing advances to this joint venture are repaid when the sale of loans is completed or the real estate is permanently refinanced by others. At December 31, 2014 and 2013, the Company had $135 million and $205 million, respectively, of outstanding advances to this joint venture. These advances are included in commercial real estate loans.
	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 $574 million at December 31, 2014, and $556 million at December 31, 2013. All purchased loans and related indemnification assets are recorded at fair value at the date of purchase. The Company evaluates purchased loans for impairment at the date of purchase in accordance with applicable authoritative accounting guidance. Purchased loans with evidence of credit deterioration since origination for which it is probable that all contractually required payments will not be collected are considered “purchased impaired loans.” All other purchased loans are considered “purchased nonimpaired loans.”
	On the acquisition date, the estimate of the contractually required payments receivable for all purchased nonimpaired loans acquired in the 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 for the years ended December 31, were as follows:
	(Dollars in Millions)		2014			2013			2012
	Balance at beginning of period		$	1,655		$	1,709		$	2,619
	Purchases			–			–			13
	Accretion			(441	)		(499	)		(437	)
	Disposals			(131	)		(172	)		(208	)
	Reclassifications from nonaccretable difference(a)			229			258			454
	Other(b)			(3	)		359			(732	)
	Balance at end of period		$	1,309		$	1,655		$	1,709
	(a)	Primarily relates to changes in expected credit performance.
	(b)	The amount for the year ended December 31, 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 107 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. The amount for the year end December 31, 2012, primarily represents a change in the Company’s expectations regarding potential sale of modified covered loans at the end of the indemnification agreements which results in a reduction in the expected contractual interest payments included in the accretable balance for those loans that may be sold.
	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 FDIC.
	Activity in the allowance for credit losses by portfolio class was as follows:
	(Dollars in Millions)		Commercial			Commercial			Residential			Credit			Other			Total Loans,			Covered			Total
						Real Estate			Mortgages			Card			Retail			Excluding			Loans			Loans
																		Covered Loans
	Balance at December 31, 2013		$	1,075		$	776		$	875		$	884		$	781		$	4,391		$	146		$	4,537
	Add
	Provision for credit losses			266			(63	)		107			657			278			1,245			(16	)		1,229
	Deduct
	Loans charged off			305			36			216			725			384			1,666			13			1,679
	Less recoveries of loans charged off			(110	)		(49	)		(21	)		(67	)		(96	)		(343	)		(2	)		(345	)
	Net loans charged off			195			(13	)		195			658			288			1,323			11			1,334
	Other changes(a)			–			–			–			(3	)		–			(3	)		(54	)		(57	)
	Balance at December 31, 2014		$	1,146		$	726		$	787		$	880		$	771		$	4,310		$	65		$	4,375
	Balance at December 31, 2012		$	1,051		$	857		$	935		$	863		$	848		$	4,554		$	179		$	4,733
	Add
	Provision for credit losses			144			(114	)		212			677			351			1,270			70			1,340
	Deduct
	Loans charged off			246			92			297			739			523			1,897			37			1,934
	Less recoveries of loans charged off			(126	)		(125	)		(25	)		(83	)		(105	)		(464	)		(5	)		(469	)
	Net loans charged off			120			(33	)		272			656			418			1,433			32			1,465
Other changes(a)			–			–			–			–			–			–			(71	)		(71	)
Balance at December 31, 2013		$	1,075		$	776		$	875		$	884		$	781		$	4,391		$	146		$	4,537
Balance at December 31, 2011		$	1,010		$	1,154		$	927		$	992		$	831		$	4,914		$	100		$	5,014
Add
Provision for credit losses			316			(131	)		446			571			558			1,760			122			1,882
Deduct
Loans charged off			378			242			461			769			666			2,516			11			2,527
Less recoveries of loans charged off			(103	)		(76	)		(23	)		(102	)		(125	)		(429	)		(1	)		(430	)
Net loans charged off			275			166			438			667			541			2,087			10			2,097
Other changes(a)			–			–			–			(33	)		–			(33	)		(33	)		(66	)
Balance at December 31, 2012		$	1,051		$	857		$	935		$	863		$	848		$	4,554		$	179		$	4,733
(a)	Includes net changes in credit losses to be reimbursed by the FDIC and for the years ended December 31, 2014 and 2013, 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 December 31, 2014
Related to
Loans individually evaluated for impairment(a)		$	5		$	4		$	–		$	–		$	–		$	9		$	–		$	9
TDRs collectively evaluated for impairment			12			12			319			61			41			445			4			449
Other loans collectively evaluated for impairment			1,129			678			468			819			730			3,824			1			3,825
Loans acquired with deteriorated credit quality			–			32			–			–			–			32			60			92
Total allowance for credit losses		$	1,146		$	726		$	787		$	880		$	771		$	4,310		$	65		$	4,375
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
December 31, 2014
Loans individually evaluated for impairment(a)		$	159		$	128		$	12		$	–		$	–		$	299		$	–		$	299
TDRs collectively evaluated for impairment			124			393			4,653			240			237			5,647			34			5,681
Other loans collectively evaluated for impairment			80,093			41,744			46,953			18,275			49,027			236,092			2,463			238,555
Loans acquired with deteriorated credit quality			1			530			1			–			–			532			2,784			3,316
Total loans		$	80,377		$	42,795		$	51,619		$	18,515		$	49,264		$	242,570		$	5,281		$	247,851
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. These credit quality ratings are an important part of the Company’s overall credit risk management process and evaluation of its allowance for credit losses.
U.S. BANCORP		The power of potential
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
December 31, 2014
Commercial		$	79,977		$	247		$	41		$	112		$	80,377
Commercial real estate			42,406			110			20			259			42,795
Residential mortgages(a)			50,330			221			204			864			51,619
Credit card			18,046			229			210			30			18,515
Other retail			48,764			238			75			187			49,264
Total loans, excluding covered loans			239,523			1,045			550			1,452			242,570
Covered loans			4,804			68			395			14			5,281
Total loans		$	244,327		$	1,113		$	945		$	1,466		$	247,851
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 December 31, 2014, $431 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.
Total nonperforming assets include nonaccrual loans, restructured loans not performing in accordance with modified terms, other real estate and other nonperforming assets owned by the Company. For details of the Company’s nonperforming assets as of December 31, 2014 and 2013, see Table 16 included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements.
At December 31, 2014, the amount of foreclosed residential real estate held by the Company, and included in other real estate owned, was $270 million ($233 million excluding covered assets). This excludes $641 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 December 31, 2014, was $2.9 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 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
December 31, 2014
Commercial		$	78,409		$	1,204		$	764		$	1,968		$	80,377
Commercial real estate			41,322			451			1,022			1,473			42,795
Residential mortgages(b)			50,479			5			1,135			1,140			51,619
Credit card			18,275			–			240			240			18,515
Other retail			48,932			20			312			332			49,264
Total loans, excluding covered loans			237,417			1,680			3,473			5,153			242,570
Covered loans			5,164			–			117			117			5,281
Total loans		$	242,581		$	1,680		$	3,590		$	5,270		$	247,851
Total outstanding commitments		$	501,535		$	2,964		$	4,179		$	7,143		$	508,678
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 December 31, 2014, $3.1 billion of GNMA loans 90 days or more past due and $2.2 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. A summary of impaired loans, which include all nonaccrual and TDR 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
December 31, 2014
Commercial		$	329		$	769		$	21		$	51
Commercial real estate			624			1,250			23			18
Residential mortgages			2,730			3,495			273			–
Credit card			240			240			61			–
Other retail			361			570			44			4
Total impaired loans, excluding GNMA and covered loans			4,284			6,324			422			73
Loans purchased from GNMA mortgage pools			2,244			2,244			50			–
Covered loans			43			55			4			1
Total		$	6,571		$	8,623		$	476		$	74
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 December 31, 2014 and 2013, had an associated allowance for credit losses. The total amount of interest income recognized during 2014 on loans classified as impaired at December 31, 2014, excluding those acquired with deteriorated credit quality, was $341 million, compared to what would have been recognized at the original contractual terms of the loans of $470 million.
U.S. BANCORP		The power of potential
Additional information on impaired loans for the years ended December 31 follows:
(Dollars in Millions)		Average			Interest
		Recorded			Income
		Investment			Recognized
2014
Commercial		$	414		$	9
Commercial real estate			592			26
Residential mortgages			2,742			140
Credit card			273			9
Other retail			377			17
Total impaired loans, excluding GNMA and covered loans			4,398			201
Loans purchased from GNMA mortgage pools			2,609			124
Covered loans			334			15
Total		$	7,341		$	340
2013
Commercial		$	382		$	29
Commercial real estate			889			39
Residential mortgages			2,749			134
Credit card			366			16
Other retail			424			24
Total impaired loans, excluding GNMA and covered loans			4,810			242
Loans purchased from GNMA mortgage pools			1,967			100
Covered loans			561			27
Total		$	7,338		$	369
2012
Commercial		$	470		$	18
Commercial real estate			1,314			43
Residential mortgages			2,717			130
Credit card			510			28
Other retail			301			19
Total impaired loans, excluding GNMA and covered loans			5,312			238
Loans purchased from GNMA mortgage pools			1,448			73
Covered loans			980			29
Total		$	7,740		$	340
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. The following table provides a summary of loans modified as TDRs for the years ended December 31, by portfolio class:
(Dollars in Millions)		Number			Pre-Modification			Post-Modification
		of Loans			Outstanding			Outstanding
					Loan			Loan
					Balance			Balance
2014
Commercial			2,027		$	238		$	203
Commercial real estate			78			80			71
Residential mortgages			2,089			271			274
Credit card			26,511			144			145
Other retail			2,833			61			61
Total loans, excluding GNMA and covered loans			33,538			794			754
Loans purchased from GNMA mortgage pools			8,961			1,000			1,013
Covered loans			43			15			14
Total loans			42,542		$	1,809		$	1,781
2013
Commercial			2,429		$	166		$	155
Commercial real estate			165			205			198
Residential mortgages			2,179			309			304
Credit card			26,669			160			161
Other retail			4,290			103			102
Total loans, excluding GNMA and covered loans			35,732			943			920
Loans purchased from GNMA mortgage pools			8,878			1,121			1,066
Covered loans			123			94			72
Total loans			44,733		$	2,158		$	2,058
2012
Commercial			4,843		$	307		$	272
Commercial real estate			312			493			461
Residential mortgages			4,616			638			623
Credit card			49,320			241			255
Other retail			10,461			279			275
Total loans, excluding GNMA and covered loans			69,552			1,958			1,886
Loans purchased from GNMA mortgage pools			9,518			1,280			1,245
Covered loans			192			277			263
Total loans			79,262		$	3,515		$	3,394
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 fourth quarter of 2014, at December 31, 2014, 226 residential mortgages, 16 home equity and second mortgage loans and 1,540 loans purchased from GNMA mortgage pools with outstanding balances of $25 million, $1 million and $198 million, respectively, were in a trial period and have estimated post-modification balances of $29 million, $1 million and $198 million, respectively, assuming permanent modification occurs at the end of the trial period.
U.S. BANCORP		The power of potential
The following table provides a summary of TDR loans that defaulted (fully or partially charged-off or became 90 days or more past due) for the years ended December 31, that were modified as TDRs within 12 months previous to default:
(Dollars in Millions)		Number			Amount
		of Loans			Defaulted
2014
Commercial			629		$	44
Commercial real estate			22			12
Residential mortgages			611			86
Credit card			6,335			33
Other retail			845			24
Total loans, excluding GNMA and covered loans			8,442			199
Loans purchased from GNMA mortgage pools			876			102
Covered loans			14			5
Total loans			9,332		$	306
2013
Commercial			642		$	46
Commercial real estate			87			102
Residential mortgages			1,099			163
Credit card			6,640			37
Other retail			1,841			80
Total loans, excluding GNMA and covered loans			10,309			428
Loans purchased from GNMA mortgage pools			4,972			640
Covered loans			63			49
Total loans			15,344		$	1,117
2012
Commercial			859		$	48
Commercial real estate			111			232
Residential mortgages			1,073			146
Credit card			9,774			54
Other retail			1,818			56
Total loans, excluding GNMA and covered loans			13,635			536
Loans purchased from GNMA mortgage pools			1,245			177
Covered loans			68			97
Total loans			14,948		$	810
In addition to the defaults in the table above, for the year ended December 31, 2014, the Company had a total of 1,778 residential mortgage loans, home equity and second mortgage loans and loans purchased from GNMA mortgage pools with aggregate outstanding balances of $222 million where borrowers did not successfully complete the trial period arrangement and therefore are no longer eligible for a permanent modification under the applicable modification program.
Covered Assets Covered assets represent loans and other assets acquired from the FDIC, subject to loss sharing agreements, and include expected reimbursements from the FDIC. Effective December 31, 2014, the loss sharing coverage provided by the FDIC expired on all previously covered assets, except for residential mortgages and home equity and second mortgage loans that remain covered under loss sharing agreements with remaining terms of up to five years. The carrying amount of the covered assets at December 31, consisted of purchased impaired loans, purchased nonimpaired loans and other assets as shown in the following table:
		2014												2013
(Dollars in Millions)		Purchased			Purchased			Other			Total			Purchased			Purchased			Other			Total
		Impaired			Nonimpaired			Assets						Impaired			Nonimpaired			Assets
		Loans			Loans									Loans			Loans
Commercial loans		$	–		$	–		$	–		$	–		$	–		$	32		$	–		$	32
Commercial real estate loans			–			–			–			–			738			1,494			–			2,232
Residential mortgage loans			2,784			738			–			3,522			3,037			890			–			3,927
Credit card loans			–			–			–			–			–			5			–			5
Other retail loans			–			584			–			584			–			666			–			666
Losses reimbursable by the FDIC(a)			–			–			717			717			–			–			798			798
Unamortized changes in FDIC asset(b)			–			–			458			458			–			–			802			802
Covered loans			2,784			1,322			1,175			5,281			3,775			3,087			1,600			8,462
Foreclosed real estate			–			–			37			37			–			–			97			97
Total covered assets		$	2,784		$	1,322		$	1,212		$	5,318		$	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 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.

Leases

Leases	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Leases	NOTE 7    LEASES
	The components of the net investment in sales-type and direct financing leases at December 31 were as follows:
	(Dollars in Millions)		2014			2013
	Aggregate future minimum lease payments to be received		$	11,173		$	11,074
	Unguaranteed residual values accruing to the lessor’s benefit			695			783
	Unearned income			(1,004	)		(1,045	)
	Initial direct costs			202			189
	Total net investment in sales-type and direct financing leases(a)		$	11,066		$	11,001
	(a)	The accumulated allowance for uncollectible minimum lease payments was $65 million and $68 million at December 31, 2014 and 2013, respectively.
	The minimum future lease payments to be received from sales-type and direct financing leases were as follows at December 31, 2014:
	(Dollars in Millions)
	2015			3,696
	2016			3,417
	2017			2,601
	2018			813
	2019			291
	Thereafter			355

Accounting_for_Transfers_and_S

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	NOTE 8	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 23.
	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 MSRs, refer to Note 10. 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 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 $773 million, $758 million and $683 million for the years ended December 31, 2014, 2013 and 2012, respectively. The Company also recognized $937 million, $780 million and $200 million of investment tax credits for the years ended December 31, 2014, 2013 and 2012, respectively. The Company recognized $771 million, $934 million and $805 million of expenses related to all of these investments for the years ended December 31, 2014, 2013 and 2012, respectively, of which $258 million, $297 million and $282 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, 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:
	At December 31 (Dollars in Millions)		2014		2013
	Investment carrying amount		$	4,259	$	4,178
	Unfunded capital and other commitments			1,743		1,661
	Maximum exposure to loss			8,393		7,390
	The Company also has noncontrolling financial investments in private investment funds and partnerships considered to be VIEs, which are not consolidated. The Company’s recorded investment in these entities, carried in other assets on the Consolidated Balance Sheet, was approximately $94 million at December 31, 2014, compared with $98 million at December 31, 2013. The maximum exposure to loss related to these VIEs was $105 million at December 31, 2014 and $107 million at December 31, 2013, representing the Company’s investment balance and its unfunded commitments to invest additional amounts.
	The Company’s individual net investments in unconsolidated VIEs, which exclude any unfunded capital commitments, ranged from less than $1 million to $53 million at December 31, 2014, compared with less than $1 million to $37 million at December 31, 2013.
	The Company is required to consolidate VIEs in which it has concluded it has a controlling financial interest. The Company sponsors entities to which it transfers its interests in tax-advantaged investments to third parties. At December 31, 2014, approximately $2.7 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 December 31, 2014, $35 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 December 31, 2014, $2.9 billion of available-for-sale investment securities and $2.7 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 investment securities and $4.6 billion of short-term borrowings at December 31, 2013.

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	NOTE 9    PREMISES AND EQUIPMENT
	Premises and equipment at December 31 consisted of the following:
	(Dollars in Millions)	2014			2013
	Land	$	534		$	529
	Buildings and improvements		3,323			3,256
	Furniture, fixtures and equipment		2,719			2,593
	Capitalized building and equipment leases		126			103
	Construction in progress		26			24
			6,728			6,505
	Less accumulated depreciation and amortization		(4,110	)		(3,899	)
	Total	$	2,618		$	2,606

Mortgage_Servicing_Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Mortgage Servicing Rights	NOTE 10	MORTGAGE SERVICING RIGHTS
	The Company serviced $225.0 billion of residential mortgage loans for others at December 31, 2014, and $226.8 billion at December 31, 2013, which include subserviced mortgages with no corresponding MSRs asset. The net impact included in mortgage banking revenue of fair value changes of MSRs due to changes in valuation assumptions and derivatives used to economically hedge MSRs were net gains of $241 million (of which $44 million related to excess servicing rights sold during 2014), $192 million and $102 million for the years ended December 31, 2014, 2013 and 2012, respectively. Loan servicing fees, not including valuation changes, included in mortgage banking revenue, were $732 million, $754 million and $720 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Changes in fair value of capitalized MSRs for the years ended December 31, are summarized as follows:
	(Dollars in Millions)		2014			2013			2012
	Balance at beginning of period		$	2,680		$	1,700		$	1,519
	Rights purchased			5			8			42
	Rights capitalized			382			769			957
	Rights sold			(141	)		–			–
	Changes in fair value of MSRs
	Due to fluctuations in market interest rates(a)			(276	)		617			(249	)
	Due to revised assumptions or models(b)			86			33			(21	)
	Other changes in fair value(c)			(398	)		(447	)		(548	)
	Balance at end of period		$	2,338		$	2,680		$	1,700
	(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. In addition, 2014 includes a $44 million revaluation gain related to excess servicing rights sold.
	(c)	Primarily represents changes due to realization of expected cash flows over time (decay).
	The estimated sensitivity to changes in market interest rates of the fair value of the MSRs portfolio and the related derivative instruments as of December 31 follows:
			2014																		2013
	(Dollars in Millions)		Down			Down			Down			Up			Up			Up			Down			Down			Down			Up			Up			Up
			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps
	MSR portfolio		$	(540	)	$	(242	)	$	(114	)	$	100		$	185		$	346		$	(435	)	$	(199	)	$	(93	)	$	82		$	154		$	287
	Derivative instrument hedges			441			223			109			(102	)		(197	)		(375	)		399			194			91			(82	)		(157	)		(301	)
	Net sensitivity		$	(99	)	$	(19	)	$	(5	)	$	(2	)	$	(12	)	$	(29	)	$	(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 as of December 31 follows:
			2014												2013
	(Dollars in Millions)		MRBP			Government			Conventional(b)			Total			MRBP			Government			Conventional(b)			Total
	Servicing portfolio		$	19,706		$	40,471		$	162,620		$	222,797		$	15,896		$	41,659		$	169,287		$	226,842
	Fair value		$	213		$	426		$	1,699		$	2,338		$	180		$	500		$	2,000		$	2,680
	Value (bps)(a)			108			105			104			105			113			120			118			118
	Weighted-average servicing fees (bps)			37			33			27			29			39			32			29			30
	Multiple (value/servicing fees)			2.92			3.18			3.85			3.62			2.9			3.75			4.07			3.93
	Weighted-average note rate			4.58	%		4.18	%		4.14	%		4.19	%		4.7	%		4.24	%		4.17	%		4.22	%
	Weighted-average age (in years)			3.6			3.2			3.1			3.2			3.8			2.6			2.5			2.6
	Weighted-average expected prepayment (constant prepayment rate)			12.8	%		14.8	%		11.4	%		12.1	%		13.5	%		11.5	%		10.9	%		11.2	%
	Weighted-average expected life (in years)			6.2			5.5			6.5			6.3			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.

Intangible_Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE 11    INTANGIBLE ASSETS
	Intangible assets consisted of the following:
			Estimated		Amortization			Balance
	At December 31 (Dollars in Millions)		Life(a)		Method(b)			2014			2013
	Goodwill					(c	)	$	9,389		$	9,205
	Merchant processing contracts			9 years/8 years		SL/AC			174			229
	Core deposit benefits			22 years/5 years		SL/AC			234			135
	Mortgage servicing rights					(c	)		2,338			2,680
	Trust relationships			10 years/6 years		SL/AC			97			122
	Other identified intangibles			6 years/5 years		SL/AC			319			363
	Total							$	12,551		$	12,734
	(a)	Estimated life represents the amortization period for assets subject to the straight line method and the weighted average or life of the underlying cash flows amortization period for intangibles subject to accelerated methods. If more than one amortization method is used for a category, the estimated life for each method is calculated and reported separately.
	(b)  Amortization methods:		SL =traight line method
			AC =ccelerated methods generally based on cash flows
	(c)	Goodwill is evaluated for impairment, but not amortized. Mortgage servicing rights are recorded at fair value, and are not amortized.
	Aggregate amortization expense consisted of the following:
	Year Ended December 31 (Dollars in Millions)		2014		2013			2012
	Merchant processing contracts		$	50	$	64		$	74
	Core deposit benefits			38		41			60
	Trust relationships			27		34			39
	Other identified intangibles			84		84			101
	Total		$	199	$	223		$	274
	The estimated amortization expense for the next five years is as follows:
	(Dollars in Millions)
	2015		$	169
	2016			139
	2017			118
	2018			97
	2019			75
	The following table reflects the changes in the carrying value of goodwill for the years ended December 31, 2014, 2013 and 2012:
	(Dollars in Millions)		Wholesale Banking and		Consumer and Small			Wealth Management and			Payment			Treasury and		Consolidated
			Commercial Real Estate		Business Banking			Securities Services			Services			Corporate Support		Company
	Balance at December 31, 2011		$	1,605	$	3,514		$	1,463		$	2,345		$	–	$	8,927
	Goodwill acquired			–		–			65			143			–		208
	Other(a)			–		–			–			8			–		8
	Balance at December 31, 2012		$	1,605	$	3,514		$	1,528		$	2,496		$	–	$	9,143
	Goodwill acquired			–		–			37			20			–		57
	Other(a)			–		–			–			5			–		5
	Balance at December 31, 2013		$	1,605	$	3,514		$	1,565		$	2,521		$	–	$	9,205
	Goodwill acquired			43		166			8			–			–		217
	Other(a)			–		–			(3	)		(30	)		–		(33	)
	Balance at December 31, 2014		$	1,648	$	3,680		$	1,570		$	2,491		$	–	$	9,389
	(a)	Other changes in goodwill include the effect of foreign exchange translation.

ShortTerm_Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Short-Term Borrowings	NOTE 12	SHORT-TERM BORROWINGS(a)
	The following table is a summary of short-term borrowings for the last three years:
			2014					2013					2012
	(Dollars in Millions)		Amount		Rate			Amount		Rate			Amount		Rate
	At year-end
	Federal funds purchased		$	886		0.12	%	$	594		0.11	%	$	950		0.11	%
	Securities sold under agreements to repurchase			948		0.05			2,057		5.34			3,388		3.26
	Commercial paper			22,197		0.12			19,400		0.11			16,202		0.12
	Other short-term borrowings			5,862		0.51			5,557		0.19			5,762		0.29
	Total		$	29,893		0.19	%	$	27,608		0.52	%	$	26,302		0.57	%
	Average for the year
	Federal funds purchased(b)		$	2,366		7.94	%	$	1,879		9.72	%	$	1,338		15.32	%
	Securities sold under agreements to repurchase			798		1.07			2,403		4.65			4,942		3.52
	Commercial paper			21,227		0.12			17,467		0.12			15,806		0.14
	Other short-term borrowings			5,861		0.78			5,934		0.72			6,463		0.72
	Total(b)		$	30,252		0.88	%	$	27,683		1.29	%	$	28,549		1.57	%
	Maximum month-end balance
	Federal funds purchased		$	3,258				$	3,569				$	2,467
	Securities sold under agreements to repurchase			948					3,121					5,922
	Commercial paper			22,322					19,400					17,385
	Other short-term borrowings			7,417					6,301					7,443
	(a)	Interest and rates are presented on a fully taxable-equivalent basis utilizing a tax rate of 35 percent.
	(b)	Average federal funds purchased and total short-term borrowings rates include amounts paid by the Company to certain corporate card customers for paying outstanding noninterest-bearing corporate card balances within certain timeframes per specific agreements. These activities reduce the Company’s short-term funding needs, and if they did not occur, the Company would use other funding alternatives, including the use of federal funds purchased. The amount of this compensation expense paid by the Company and included in federal funds purchased and total short-term borrowings rates for 2014, 2013 and 2012 was $186 million, $181 million and $203 million, respectively.

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 13    LONG-TERM DEBT
	Long-term debt (debt with original maturities of more than one year) at December 31 consisted of the following:
	(Dollars in Millions)		Rate Type		Rate(a)			Maturity Date		2014		2013
	U.S. Bancorp (Parent Company)
	Subordinated notes			Fixed		2.95	%		2022	$	1,300	$	1,300
				Fixed		3.6	%		2024		1,000		–
				Fixed		7.5	%		2026		199		199
	Medium-term notes			Fixed		1.650% - 4.125	%		2015 - 2024		9,250		8,750
				Floating		.634% - .722	%		2018 - 2019		750		500
	Junior subordinated debentures			Fixed		3.442	%		2016		500		500
	Capitalized lease obligations, mortgage indebtedness and other(b)										190		167
	Subtotal										13,189		11,416
	Subsidiaries
	Subordinated notes			Fixed		6.3	%		2014		–		963
				Fixed		4.95	%		2014		–		1,000
				Fixed		4.8	%		2015		500		500
				Fixed		3.778	%		2020		500		500
				Floating		0.524	%		2014		–		373
	Federal Home Loan Bank advances			Fixed		1.250% - 8.250	%		2017 - 2026		11		13
				Floating		.236% - .507	%		2015 - 2022		7,334		4,579
	Bank notes			Fixed		1.100% - 2.125	%		2017 - 2019		4,050		–
				Floating		–% - .713	%		2015 - 2054		6,069		142
	Capitalized lease obligations, mortgage indebtedness and other(b)										607		563
	Subtotal										19,071		8,633
	Total									$	32,260	$	20,049
	(a)	Weighted-average interest rates of medium-term notes, Federal Home Loan Bank advances and bank notes were 2.47 percent, .31 percent and .85 percent, respectively.
	(b)	Other includes consolidated community development and tax-advantaged investment VIEs, debt issuance fees, and unrealized gains and losses and deferred amounts relating to derivative instruments.
	The Company has arrangements with the Federal Home Loan Bank and Federal Reserve Bank whereby the Company could have borrowed an additional $76.0 billion and $69.7 billion at December 31, 2014 and 2013, respectively, based on collateral available.
	Maturities of long-term debt outstanding at December 31, 2014, were:
	(Dollars in Millions)		Parent		Consolidated
			Company
	2015		$	1,750	$	4,754
	2016			1,931		6,343
	2017			1,248		7,135
	2018			1,497		3,524
	2019			1,506		3,488
	Thereafter			5,257		7,016
	Total		$	13,189	$	32,260

Junior_Subordinated_Debentures

Junior Subordinated Debentures	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Junior Subordinated Debentures	NOTE 14    JUNIOR SUBORDINATED DEBENTURES
	As of December 31, 2014, the Company sponsored, and wholly owned 100 percent of the common equity of, USB Capital IX, a wholly-owned unconsolidated trust, formed for the purpose of issuing redeemable Income Trust Securities (“ITS”) to third party investors, originally investing the proceeds in junior subordinated debt securities (“Debentures”) issued by the Company and entering into stock purchase contracts to purchase preferred stock in the future. During 2010, the Company exchanged depositary shares representing an ownership interest in its Series A Non-Cumulative Perpetual Preferred Stock (“Series A Preferred Stock”) to acquire a portion of the ITS issued by USB Capital IX and retire a portion of the Debentures and cancel a pro-rata portion of stock purchase contracts. During 2011, USB Capital IX sold the remaining Debentures, originally issued by the Company to the trust, to investors to generate cash proceeds to purchase the Company’s Series A Preferred Stock pursuant to the stock purchase contracts. As part of this sale, a consolidated subsidiary of the Company purchased $176 million of the Debentures, which effectively retired the debt. The Company classifies the remaining $500 million of Debentures at December 31, 2014 and 2013, as long-term debt. As of December 31, 2014 and 2013, $676 million of the Company’s Series A Preferred Stock was the sole asset of USB Capital IX. The Company’s obligations under the transaction documents, taken together, have the effect of providing a full and unconditional guarantee by the Company, on a junior subordinated basis, of the payment obligations of the trust.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Shareholders' Equity	NOTE 15	SHAREHOLDERS’ EQUITY
	At December 31, 2014 and 2013, the Company had authority to issue 4 billion shares of common stock and 50 million shares of preferred stock. The Company had 1.8 billion shares of common stock outstanding at December 31, 2014 and 2013. The Company had 91 million shares reserved for future issuances, primarily under its stock incentive plans at December 31, 2014.
	The number of shares issued and outstanding and the carrying amount of each outstanding series of the Company’s preferred stock was as follows:
			2014														2013
	At December 31,		Shares			Liquidation			Discount			Carrying					Shares				Liquidation		Discount		Carrying
	(Dollars in Millions)		Issued and			Preference						Amount					Issued and				Preference				Amount
			Outstanding														Outstanding
	Series A			12,510		$	1,251		$	145		$	1,106					12,510			$	1,251	$	145	$	1,106
	Series B			40,000			1,000			–			1,000					40,000				1,000		–		1,000
	Series F			44,000			1,100			12			1,088					44,000				1,100		12		1,088
	Series G			43,400			1,085			10			1,075					43,400				1,085		10		1,075
	Series H			20,000			500			13			487					20,000				500		13		487
	Total preferred stock(a)			159,910		$	4,936		$	180		$	4,756					159,910			$	4,936	$	180	$	4,756
	(a)	The par value of all shares issued and outstanding at December 31, 2014 and 2013, was $1.00 per share.
	During 2013, the Company issued depositary shares representing an ownership interest in 20,000 shares of Series H Non-Cumulative Perpetual Preferred Stock with a liquidation preference of $25,000 per share (the “Series H Preferred Stock”). The Series H Preferred Stock has no stated maturity and will not be subject to any sinking fund or other obligation of the Company. Dividends, if declared, will accrue and be payable quarterly, in arrears, at a rate per annum equal to 5.15 percent. The Series H Preferred Stock is redeemable at the Company’s option, in whole or in part, on or after July 15, 2018. The Series H Preferred stock is redeemable at the Company’s option, in whole, but not in part, prior to July 15, 2018 within 90 days following an official administrative or judicial decision, amendment to, or change in the laws or regulations that would not allow the Company to treat the full liquidation value of the Series H Preferred Stock as Tier 1 capital for purposes of the capital adequacy guidelines of the Federal Reserve.
	During 2012, the Company issued depositary shares representing an ownership interest in 44,000 shares of Series F Non-Cumulative Perpetual Preferred Stock with a liquidation preference of $25,000 per share (the “Series F Preferred Stock”), and depositary shares representing an ownership interest in 43,400 shares of Series G Non-Cumulative Perpetual Preferred Stock with a liquidation preference of $25,000 per share (the “Series G Preferred Stock”). The Series F Preferred Stock and Series G Preferred Stock have no stated maturity and will not be subject to any sinking fund or other obligation of the Company. Dividends, if declared, will accrue and be payable quarterly, in arrears, at a rate per annum equal to 6.50 percent from the date of issuance to, but excluding, January 15, 2022, and thereafter at a floating rate per annum equal to three-month LIBOR plus 4.468 percent for the Series F Preferred Stock, and 6.00 percent from the date of issuance to, but excluding, April 15, 2017, and thereafter at a floating rate per annum equal to three-month LIBOR plus 4.86125 percent for the Series G Preferred Stock. Both series are redeemable at the Company’s option, in whole or in part, on or after January 15, 2022, for the Series F Preferred Stock and April 15, 2017, for the Series G Preferred Stock. Both series are redeemable at the Company’s option, in whole, but not in part, prior to January 15, 2022, for the Series F Preferred Stock and prior to April 15, 2017, for the Series G Preferred Stock, within 90 days following an official administrative or judicial decision, amendment to, or change in the laws or regulations that would not allow the Company to treat the full liquidation value of the Series F Preferred Stock or Series G Preferred Stock, respectively, as Tier 1 capital for purposes of the capital adequacy guidelines of the Federal Reserve Board.
	During 2010, the Company issued depositary shares representing an ownership interest in 5,746 shares of Series A Preferred Stock to investors, in exchange for their portion of USB Capital IX Income Trust Securities. During 2011, the Company issued depositary shares representing an ownership interest in 6,764 shares of Series A Preferred Stock to USB Capital IX, thereby settling the stock purchase contract established between the Company and USB Capital IX as part of the 2006 issuance of USB Capital IX Income Trust Securities. The preferred shares were issued to USB Capital IX for the purchase price specified in the stock forward purchase contract. The Series A Preferred stock has a liquidation preference of $100,000 per share, no stated maturity and will not be subject to any sinking fund or other obligation of the Company. Dividends, if declared, will accrue and be payable quarterly, in arrears, at a rate per annum equal to the greater of three-month LIBOR plus 1.02 percent or 3.50 percent. The Series A Preferred Stock is redeemable at the Company’s option, subject to prior approval by the Federal Reserve Board.
	During 2006, the Company issued depositary shares representing an ownership interest in 40,000 shares of Series B Non-Cumulative Perpetual Preferred Stock with a liquidation preference of $25,000 per share (the “Series B Preferred Stock”). The Series B Preferred Stock has no stated maturity and will not be subject to any sinking fund or other obligation of the Company. Dividends, if declared, will accrue and be payable quarterly, in arrears, at a rate per annum equal to the greater of three-month LIBOR plus .60 percent, or 3.50 percent. The Series B Preferred Stock is redeemable at the Company’s option, subject to the prior approval of the Federal Reserve Board.
	During 2014, 2013 and 2012, the Company repurchased shares of its common stock under various authorizations approved by its Board of Directors. As of December 31, 2014, the approximate dollar value of shares that may yet be purchased by the Company under the current Board of Directors approved authorization was $520 million.
	The following table summarizes the Company’s common stock repurchased in each of the last three years:
	(Dollars and Shares in Millions)		Shares			Value
	2014			54		$	2,262
	2013			65			2,336
	2012			59			1,878
	Shareholders’ equity is affected by transactions and valuations of asset and liability positions that require adjustments to accumulated other comprehensive income (loss). The reconciliation of the transactions affecting accumulated other comprehensive income (loss) included in shareholders’ equity for the years ended December 31, is as follows:
	(Dollars in Millions)		Unrealized Gains			Unrealized Gains			Unrealized Gains			Unrealized Gains			Foreign Currency				Total
			(Losses) on			(Losses) on			(Losses) on			(Losses) on			Translation
			Securities			Securities			Derivative Hedges			Retirement Plans
			Available-For-Sale			Transferred From
						Available-For-Sale
						to  Held-To-Maturity
	2014
	Balance at beginning of period		$	(77	)	$	70		$	(261	)	$	(743	)	$	(60	)		$	(1,071	)
	Changes in unrealized gains and losses			764			–			(41	)		(733	)		–				(10	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			1			–			–			–			–				1
	Foreign currency translation adjustment			–			–			–			–			(4	)			(4	)
	Reclassification to earnings of realized gains and losses			(3	)		(30	)		186			144			–				297
	Applicable income taxes			(293	)		12			(56	)		226			2				(109	)
	Balance at end of period		$	392		$	52		$	(172	)	$	(1,106	)	$	(62	)		$	(896	)
	2013
	Balance at beginning of period		$	679		$	107		$	(404	)	$	(1,265	)	$	(40	)		$	(923	)
	Changes in unrealized gains and losses			(1,223	)		–			37			590			–				(596	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			8			–			–			–			–				8
	Foreign currency translation adjustment			–			–			–			–			(34	)			(34	)
	Reclassification to earnings of realized gains and losses			(9	)		(59	)		192			249			–				373
	Applicable income taxes			468			22			(86	)		(317	)		14				101
	Balance at end of period		$	(77	)	$	70		$	(261	)	$	(743	)	$	(60	)		$	(1,071	)
	2012
	Balance at beginning of period		$	360		$	–		$	(489	)	$	(1,022	)	$	(49	)		$	(1,200	)
	Changes in unrealized gains and losses			715			–			(74	)		(543	)		–				98
	Other-than-temporary impairment not recognized in earnings on available-for-sale securities securities available-for-sale			12			–			–			–			–				12
	Transfer of securities from available-for-sale to held-to-maturity			(224	)		224			–			–			–				–
	Foreign currency translation adjustment			–			–			–			–			14				14
	Reclassification to earnings of realized gains and losses			15			(51	)		211			150			–				325
	Applicable income taxes			(199	)		(66	)		(52	)		150			(5	)			(172	)
	Balance at end of period		$	679		$	107		$	(404	)	$	(1,265	)	$	(40	)		$	(923	)
	Additional detail about the impact to net income for items reclassified out of accumulated other comprehensive income (loss) and into earnings for the years ended December 31, is as follows:
			Impact to						Affected Line Item in the
			Net Income						Consolidated Statement of Income
	(Dollars in Millions)		2014			2013
	Unrealized gains (losses) on securities available-for-sale
	Realized gains (losses) on sale of securities		$	11		$	23		Total securities gains (losses), net
	Other-than-temporary impairment recognized in earnings			(8	)		(14	)
				3			9		Total before tax
			(1	)		(4	)	Applicable income taxes
			2			5		Net-of-tax
Unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity
Amortization of unrealized gains			30			59		Interest income
			(12	)		(22	)	Applicable income taxes
			18			37		Net-of-tax
Unrealized gains (losses) on derivative hedges
Realized gains (losses) on derivative hedges			(186	)		(192	)	Net interest income
			71			74		Applicable income taxes
			(115	)		(118	)	Net-of-tax
Unrealized gains (losses) on retirement plans
Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization			(144	)		(249	)	Employee benefits expense
			56			96		Applicable income taxes
			(88	)		(153	)	Net-of-tax
Total impact to net income		$	(183	)	$	(229	)
Regulatory Capital The Company uses certain measures defined by bank regulatory agencies to access its capital. Prior to 2014, the regulatory capital requirements effective for the Company followed the Capital Accord of the Basel Committee on Banking Supervision (“Basel I”). Beginning January 1, 2014, the regulatory capital requirements effective for the Company follow Basel III, subject to certain transition provisions from Basel I over the following four years to full implementation by January 1, 2018. Basel III redefines the regulatory capital elements and minimum capital ratios, introduces regulatory capital buffers above those minimums, revises rules for calculating risk-weighted assets and requires a new common equity tier 1 capital ratio. Basel III includes two comprehensive methodologies for calculating risk-weighted assets: a general standardized approach and more risk-sensitive advanced approaches. As of April 1, 2014, the Company exited its parallel run qualification period, resulting in its capital adequacy now being evaluated against the Basel III methodology that is most restrictive.
Tier 1 capital is considered core capital and includes common shareholders’ equity plus qualifying preferred stock, trust preferred securities and noncontrolling interests in consolidated subsidiaries (subject to certain limitations), and is adjusted for the aggregate impact of certain items included in other comprehensive income (loss). Total risk-based capital includes Tier 1 capital and other items such as subordinated debt and the allowance for credit losses. Capital measures are stated as a percentage of risk-adjusted assets, which are measured based on their perceived credit risk and include certain off-balance sheet exposures, such as unfunded loan commitments, letters of credit, and derivative contracts. Under the standardized approach, the Company is also subject to a leverage ratio requirement, a non risk-based asset ratio, which is defined as Tier 1 capital as a percentage of average assets adjusted for goodwill and other non-qualifying intangibles and other assets.
For a summary of the regulatory capital requirements and the actual ratios as of December 31, 2014 and 2013, for the Company and its bank subsidiary, see Table 22 included in Management’s Discussion and Analysis, which is incorporated by reference into these Notes to Consolidated Financial Statements.
The following table provides the components of the Company’s regulatory capital at December 31:
(Dollars in Millions)		2014			2013
Basel III transitional standardized approach/Basel I:
Common shareholders’ equity		$	38,723		$	36,357
Less intangible assets
Goodwill (net of deferred tax liability)			(8,403	)		(8,343	)
Other disallowed intangible assets			(165	)		(708	)
Other(a)			701			636
Total common equity tier 1 capital			30,856
Qualifying preferred stock			4,756			4,756
Noncontrolling interests eligible for tier 1 capital			408			688
Total tier 1 capital			36,020			33,386
Eligible portion of allowance for credit losses			3,957			3,734
Subordinated debt and noncontrolling interests eligible for tier 2 capital			3,215			2,299
Other			16			(79	)
Total tier 2 capital			7,188			5,954
Total risk-based capital		$	43,208		$	39,340
Risk-weighted assets		$	317,398		$	297,919
Basel III transitional advanced approaches:
Common shareholders’ equity		$	38,723
Less intangible assets
Goodwill (net of deferred tax liability)			(8,403	)
Other disallowed intangible assets			(165	)
Other(a)			701
Total common equity tier 1 capital			30,856
Qualifying preferred stock			4,756
Noncontrolling interests eligible for tier 1 capital			408
Total tier 1 capital			36,020
Eligible portion of allowance for credit losses			1,224
Subordinated debt and noncontrolling interests eligible for tier 2 capital			3,215
Other			16
Total tier 2 capital			4,455
Total risk-based capital		$	40,475
Risk-weighted assets		$	248,596
Note:	December 31, 2014 amounts calculated under the Basel III transitional standardized and advanced approaches, with the Company being evaluated for capital adequacy against the approach that is most restrictive. December 31, 2013 amounts calculated under Basel I.
(a)	Includes the impact of items included in other comprehensive income (loss), such as unrealized gains (losses) on available-for-sale securities, accumulated net gains on cash flow hedges, pension liability adjustments, etc.
Noncontrolling interests principally represent third party investors’ interests in consolidated entities, including preferred stock of consolidated subsidiaries. During 2006, the Company’s banking subsidiary formed USB Realty Corp., a real estate investment trust, for the purpose of issuing 5,000 shares of Fixed-to-Floating Rate Exchangeable Non-cumulative Perpetual Series A Preferred Stock with a liquidation preference of $100,000 per share (“Series A Preferred Securities”) to third party investors. Dividends on the Series A Preferred Securities, if declared, will accrue and be payable quarterly, in arrears, at a rate per annum equal to three-month LIBOR plus 1.147 percent. If USB Realty Corp. has not declared a dividend on the Series A Preferred Securities before the dividend payment date for any dividend period, such dividend shall not be cumulative and shall cease to accrue and be payable, and USB Realty Corp. will have no obligation to pay dividends accrued for such dividend period, whether or not dividends on the Series A Preferred Securities are declared for any future dividend period.
The Series A Preferred Securities will be redeemable, in whole or in part, at the option of USB Realty Corp. on each fifth anniversary after the dividend payment date occurring in January 2012. Any redemption will be subject to the approval of the Office of the Comptroller of the Currency.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 16    EARNINGS PER SHARE
	The components of earnings per share were:
	Year Ended December 31		2014			2013			2012
	(Dollars and Shares in Millions, Except Per Share Data)
	Net income attributable to U.S. Bancorp		$	5,851		$	5,836		$	5,647
	Preferred dividends			(243	)		(250	)		(238	)
	Impact of preferred stock redemption(a)			–			(8	)		–
	Earnings allocated to participating stock awards			(25	)		(26	)		(26	)
	Net income applicable to U.S. Bancorp common shareholders		$	5,583		$	5,552		$	5,383
	Average common shares outstanding			1,803			1,839			1,887
	Net effect of the exercise and assumed purchase of stock awards			10			10			9
	Average diluted common shares outstanding			1,813			1,849			1,896
	Earnings per common share		$	3.1		$	3.02		$	2.85
	Diluted earnings per common share		$	3.08		$	3		$	2.84
	(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 December 31, 2013 and 2012, to purchase 5 million and 22 million common shares, respectively, were not included in the computation of diluted earnings per share for the years ended December 31, 2013 and 2012, respectively, because they were antidilutive. Convertible senior debentures outstanding at December 31, 2012, that could potentially be converted into shares of the Company’s common stock pursuant to specified formulas, were not included in the computation of dilutive earnings per share for the year ended December 31, 2012, because they were antidilutive.

Employee_Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	NOTE 17      EMPLOYEE BENEFITS
	Employee Retirement Savings Plan The Company has a defined contribution retirement savings plan that covers substantially all its employees. Qualified employees are allowed to contribute up to 75 percent of their annual compensation, subject to Internal Revenue Service limits, through salary deductions under Section 401(k) of the Internal Revenue Code. Employee contributions are invested at their direction among a variety of investment alternatives. Employee contributions are 100 percent matched by the Company, up to four percent of each employee’s eligible annual compensation. The Company’s matching contribution vests immediately and is invested in the same manner as each employee’s future contribution elections. Total expense for the Company’s matching contributions was $122 million, $118 million and $111 million in 2014, 2013 and 2012, respectively.
	Pension Plans The Company has tax qualified noncontributory defined benefit pension plans that provide benefits to substantially all its employees. Participants receive annual cash balance pay credits based on eligible pay multiplied by a percentage determined by their age and years of service. Participants also receive an annual interest credit. Employees become vested upon completing three years of vesting service. For participants in the plan before 2010 that elected to stay under their existing formula, pension benefits are provided to eligible employees based on years of service, multiplied by a percentage of their final average pay. Additionally, as a result of plan mergers, a portion of pension benefits may also be provided using a cash balance benefit formula where only interest credits continue to be credited to participants’ accounts.
	In general, the Company’s qualified pension plans’ funding objectives include maintaining a funded status sufficient to meet participant benefit obligations over time while reducing long-term funding requirements and pension costs. The Company has an established process for evaluating all of the plans, their performance and significant plan assumptions, including the assumed discount rate and the long-term rate of return (“LTROR”). Annually, the Company’s Compensation and Human Resources Committee (the “Committee”), assisted by outside consultants, evaluates plan objectives, funding policies and plan investment policies considering its long-term investment time horizon and asset allocation strategies. The process also evaluates significant plan assumptions. Although plan assumptions are established annually, the Company may update its analysis on an interim basis in order to be responsive to significant events that occur during the year, such as plan mergers and amendments.
	The Company’s funding policy is to contribute amounts to its plans sufficient to meet the minimum funding requirements of the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act, plus such additional amounts as the Company determines to be appropriate. The Company made contributions of $475 million and $296 million to its pension plan in 2014 and 2013, respectively, and does not anticipate making contributions to its pension plan in 2015. Any contributions made to the qualified plans are invested in accordance with established investment policies and asset allocation strategies.
	In addition to the funded qualified pension plans, the Company maintains non-qualified plans that are unfunded and provide benefits to certain employees. The assumptions used in computing the accumulated benefit obligation, the projected benefit obligation and net pension expense are substantially consistent with those assumptions used for the funded qualified plans. In 2015, the Company expects to contribute $21 million to its non-qualified pension plans which equals the 2015 expected benefit payments.
	Postretirement Welfare Plan In addition to providing pension benefits, the Company provides health care and death benefits to certain former employees who retired prior to January 1, 2014. Employees retiring after December 31, 2013, are not eligible for retiree health care benefits. This plan change decreased the plan’s benefit obligation by $35 million during 2013, and is subsequently being amortized as a reduction to plan expense over the remaining life of the plan participants. The Company expects to contribute $7 million to its postretirement welfare plan in 2015.
	The following table summarizes the changes in benefit obligations and plan assets for the years ended December 31, and the funded status and amounts recognized in the Consolidated Balance Sheet at December 31 for the retirement plans:
			Pension Plans						Postretirement
									Welfare Plan
	(Dollars in Millions)		2014			2013			2014			2013
	Change In Projected Benefit Obligation
	Benefit obligation at beginning of measurement period		$	3,895		$	4,096		$	100		$	142
	Service cost			152			168			–			3
	Interest cost			197			170			3			4
	Participants’ contributions			–			–			11			10
	Plan amendments			–			–			–			(35	)
	Actuarial loss (gain)			781			(388	)		13			(2	)
	Lump sum settlements(a)			(286	)		(34	)		–			–
	Benefit payments			(127	)		(117	)		(25	)		(24	)
	Federal subsidy on benefits paid			–			–			2			2
	Benefit obligation at end of measurement period(b)		$	4,612		$	3,895		$	104		$	100
	Change In Fair Value Of Plan Assets
	Fair value at beginning of measurement period		$	2,831		$	2,321		$	92		$	105
	Actual return on plan assets			269			343			–			–
	Employer contributions			500			318			7			1
	Participants’ contributions			–			–			11			10
	Lump sum settlements(a)			(286	)		(34	)		–			–
	Benefit payments			(127	)		(117	)		(25	)		(24	)
	Fair value at end of measurement period		$	3,187		$	2,831		$	85		$	92
	Funded (Unfunded) Status		$	(1,425	)	$	(1,064	)	$	(19	)	$	(8	)
	Components Of The Consolidated Balance Sheet
	Current benefit liability		$	(21	)	$	(20	)	$	–		$	–
	Noncurrent benefit liability			(1,404	)		(1,044	)		(19	)		(8	)
	Recognized amount		$	(1,425	)	$	(1,064	)	$	(19	)	$	(8	)
	Accumulated Other Comprehensive Income (Loss), Pretax
	Net actuarial gain (loss)		$	(1,894	)	$	(1,333	)	$	55		$	75
	Net prior service credit (cost)			11			16			31			34
	Recognized amount		$	(1,883	)	$	(1,317	)	$	86		$	109
	(a)	2014 includes $242 million of payments as a result of a bulk lump sum offering to certain deferred vested participants.
	(b)	At December 31, 2014 and 2013, the accumulated benefit obligation for all pension plans was $4.3 billion and $3.6 billion, respectively.
	The following table provides information for pension plans with benefit obligations in excess of plan assets at December 31:
	(Dollars in Millions)		2014			2013
	Pension Plans with Projected Benefit Obligations in Excess of Plan Assets
	Projected benefit obligation		$	4,612		$	3,853
	Fair value of plan assets			3,187			2,787
	Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets
	Projected benefit obligation		$	4,612		$	3,853
	Accumulated benefit obligation			4,250			3,566
	Fair value of plan assets			3,187			2,787
	The following table sets forth the components of net periodic benefit cost and other amounts recognized in accumulated other comprehensive income (loss) for the years ended December 31 for the retirement plans:
			Pension Plans									Postretirement Welfare Plan
	(Dollars in Millions)		2014			2013			2012			2014			2013			2012
	Components Of Net Periodic Benefit Cost
	Service cost		$	152		$	168		$	129		$	–		$	3		$	5
	Interest cost			197			170			168			3			4			7
	Expected return on plan assets			(208	)		(176	)		(191	)		(1	)		(2	)		(2	)
	Prior service cost (credit) and transition obligation (asset) amortization			(5	)		(5	)		(4	)		(3	)		(1	)		–
	Actuarial loss (gain) amortization			158			264			161			(6	)		(9	)		(7	)
	Net periodic benefit cost		$	294		$	421		$	263		$	(7	)	$	(5	)	$	3
	Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income (Loss)
	Net actuarial gain (loss) arising during the year		$	(719	)	$	555		$	(567	)	$	(14	)	$	–		$	24
	Net actuarial loss (gain) amortized during the year			158			264			161			(6	)		(9	)		(7	)
	Net prior service credit (cost) arising during the year			–			–			–			–			35			–
Net prior service cost (credit) and transition obligation (asset) amortized during the year			(5	)		(5	)		(4	)		(3	)		(1	)		–
Total recognized in other comprehensive income (loss)		$	(566	)	$	814		$	(410	)	$	(23	)	$	25		$	17
Total recognized in net periodic benefit cost and other comprehensive income (loss)(a)(b)		$	(860	)	$	393		$	(673	)	$	(16	)	$	30		$	14
(a)	The pretax estimated actuarial loss (gain) and prior service cost (credit) for the pension plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in 2015 are $235 million and $(5) million, respectively.
(b)	The pretax estimated actuarial loss (gain) and prior service cost (credit) for the postretirement welfare plan that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in 2015 are $(4) million and $(3) million, respectively.
The following table sets forth weighted average assumptions used to determine the projected benefit obligations at December 31:
		Pension Plans						Postretirement
								Welfare Plan
(Dollars in Millions)		2014			2013			2014			2013
Discount rate(a)			4.13	%		4.97	%		3.46	%		3.93	%
Rate of compensation increase(b)			4.07			4.02			*			*
Health care cost trend rate for the next year(c)									7	%		7.5	%
Effect on accumulated postretirement benefit obligation
One percent increase								$	6		$	5
One percent decrease									(5	)		(4	)
(a)	The discount rates were developed using a cash flow matching bond model with a modified duration for the qualified pension plans, non-qualified pension plans and postretirement welfare plan of 15.9, 12.4, and 6.8 years, respectively, for 2014, and 14.6, 11.5 and 6.4 years, respectively, for 2013.
(b)	Determined on an active liability weighted basis.
(c)	The rate is assumed to decrease gradually to 5.00 percent by 2019 and remain at this level thereafter.
*	Not applicable
The following table sets forth weighted average assumptions used to determine net periodic benefit cost for the years ended December 31:
		Pension Plans									Postretirement Welfare Plan
(Dollars in Millions)		2014			2013			2012			2014			2013			2012
Discount rate(a)			4.97	%		4.07	%		5.07	%		3.93	%		3.1	%		4.3	%
Expected return on plan assets(b)			7.5			7.5			8			1.5			1.5			2.25
Rate of compensation increase(c)			4.02			4.08			4.05			*			*			*
Health care cost trend rate(d)
Prior to age 65												7.5	%		8	%		8	%
After age 65												7.5			8			12
Effect on total of service cost and interest cost
One percent increase											$	–		$	–		$	–
One percent decrease												–			–			–
(a)	The discount rates were developed using a cash flow matching bond model with a modified duration for the qualified pension plans, non-qualified pension plans and postretirement welfare plan of 14.6, 11.5 and 6.4 years, respectively, for 2014, and 15.9, 12.2 and 7.2 years, respectively, for 2013.
(b)	With the help of an independent pension consultant, the Company considers several sources when developing its expected long-term rates of return on plan assets assumptions, including, but not limited to, past returns and estimates of future returns given the plans’ asset allocation, economic conditions, and peer group LTROR information. The Company determines its expected long-term rates of return reflecting current economic conditions and plan assets.
(c)	Determined on an active liability weighted basis.
(d)	The pre-65 and post-65 rates are both assumed to decrease gradually to 5.00 percent by 2019 and remain at that level thereafter.
*	Not applicable
Investment Policies and Asset Allocation In establishing its investment policies and asset allocation strategies, the Company considers expected returns and the volatility associated with different strategies. An independent consultant performs modeling that projects numerous outcomes using a broad range of possible scenarios, including a mix of possible rates of inflation and economic growth. Starting with current economic information, the model bases its projections on past relationships between inflation, fixed income rates and equity returns when these types of economic conditions have existed over the previous 30 years, both in the U.S. and in foreign countries. Estimated future returns and other actuarially determined adjustments are also considered in calculating the estimated return on assets.
Generally, based on historical performance of the various investment asset classes, investments in equities have outperformed other investment classes but are subject to higher volatility. In an effort to minimize volatility, while recognizing the long-term up-side potential of investing in equities, the Committee has determined that a target asset allocation of 30 percent debt securities, 35 percent passively managed global equities, 8 percent actively managed global equities, 7 percent mid-small cap equities, 5 percent emerging markets equities, 5 percent real estate equities, 5 percent hedge funds and 5 percent private equity is appropriate.
At December 31, 2014 and 2013, plan assets of the qualified pension plans included asset management arrangements with related parties totaling $70 million and $119 million, respectively.
In accordance with authoritative accounting guidance, the Company groups plan assets into a three-level hierarchy for valuation techniques used to measure their fair value based on whether the valuation inputs are observable or unobservable. Refer to Note 22 for further discussion on these levels.
The assets of the qualified pension plans include investments in equity and U.S. Treasury securities whose fair values are determined based on quoted prices in active markets and are classified within Level 1 of the fair value hierarchy. The qualified pension plans also invest in collective investment and mutual funds whose fair values are determined using the net asset value provided by the administrator of the fund and are classified as Level 2. In addition, the qualified pension plans invest in debt securities and foreign currency transactions that are valued using third party pricing services and are classified as Level 2. The qualified pension plans invest in hedge funds and private equity funds whose fair values are determined using the net asset value provided by the fund administrators. The Company’s ability to redeem at net asset value is restricted, and accordingly, the investments in hedge and private equity funds are classified as Level 3. Additionally, the qualified pension plans invest in limited partnership interests, and in debt securities whose fair values are determined by the Company by analyzing the limited partnerships’ audited financial statements and by averaging the prices obtained from independent pricing services, respectively. These securities are classified as Level 3.
The following table summarizes the plan investment assets measured at fair value at December 31:
		Pension Plans																		Postretirement
																				Welfare Plan
		2014									2013									2014			2013
(Dollars in Millions)		Level 1			Level 2			Level 3			Level 1			Level 2			Level 3			Level 1			Level 1
Cash and cash equivalents		$	78		$	–		$	–		$	62		$	–		$	–		$	85		$	92
Debt securities			347			496			–			217			343			–			–			–
Corporate stock
Domestic equity securities			196			–			–			217			–			–			–			–
Mid-small cap equity securities(a)			146			–			–			148			–			–			–			–
International equity securities			197			–			–			229			–			–			–			–
Real estate equity securities(b)			163			–			–			137			–			–			–			–
Collective investment funds
Domestic equity securities			–			539			–			–			538			–			–			–
Mid-small cap equity securities(c)			–			54			–			–			58			–			–			–
Emerging markets equity securities			–			75			–			–			58			–			–			–
International equity securities			–			421			–			–			472			–			–			–
Mutual funds
Debt securities			–			219			–			–			177			–			–			–
Emerging markets equity securities			–			81			–			–			75			–			–			–
Hedge funds(d)			–			–			148			–			–			103			–			–
Private equity			–			–			25			–			–			–			–			–
Other			–			–			2			–			(7	)		4			–			–
Total		$	1,127		$	1,885		$	175		$	1,010		$	1,714		$	107		$	85		$	92
(a)	At December 31, 2014 and 2013, securities included $141 million in domestic equities, and $5 million and $7 million in international equities, respectively.
(b)	At December 31, 2014 and 2013, securities included $89 million and $67 million in domestic equities, respectively, and $74 million and $70 million in international equities, respectively.
(c)	At December 31, 2014 and 2013, securities included $25 million and $26 million in domestic equities, respectively, $27 million and $22 million in international equities, respectively, and $2 million and $10 million in cash and cash equivalents, respectively.
(d)	This category consists of several investment strategies diversified across several hedge fund managers.
The following table summarizes the changes in fair value for all plan investment assets measured at fair value using significant unobservable inputs (Level 3) for the years ended December 31:
		2014									2013									2012
(Dollars in Millions)		Hedge			Private			Other			Debt			Hedge			Other			Debt			Other
		Funds			Equity						Securities			Funds						Securities
Balance at beginning of period		$	103		$	–		$	4		$	7		$	–		$	3		$	7		$	6
Unrealized gains (losses) relating to assets still held at end of year			7			(2	)		(2	)		–			–			–			1			(2	)
Purchases, sales, and settlements, net			38			27			–			(7	)		103			1			(1	)		(1	)
Balance at end of period		$	148		$	25		$	2		$	–		$	103		$	4		$	7		$	3
The following benefit payments are expected to be paid from the retirement plans for the years ended December 31:
(Dollars in Millions)		Pension			Postretirement			Medicare Part D
		Plans			Welfare Plan(a)			Subsidy Receipts
2015		$	177		$	14		$	2
2016			188			13			2
2017			197			12			2
2018			207			12			2
2019			214			11			2
2020 – 2024			1,259			44			9
(a)	Net of expected retiree contributions and before Medicare Part D subsidy.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	NOTE 18    STOCK-BASED  COMPENSATION
	As part of its employee and director compensation programs, the Company currently may grant certain stock awards under the provisions of its stock incentive plan. The plan provides for grants of options to purchase shares of common stock at a fixed price equal to the fair value of the underlying stock at the date of grant. Option grants are generally exercisable up to ten years from the date of grant. In addition, the plan provides for grants of shares of common stock or stock units that are subject to restriction on transfer prior to vesting. Most stock and unit awards vest over three to five years and are subject to forfeiture if certain vesting requirements are not met. Stock incentive plans of acquired companies are generally terminated at the merger closing dates. Participants under such plans receive the Company’s common stock, or options to buy the Company’s stock, based on the conversion terms of the various merger agreements. At December 31, 2014, there were 50 million shares (subject to adjustment for forfeitures) available for grant under various plans.
	STOCK OPTION AWARDS
	The following is a summary of stock options outstanding and exercised under prior and existing stock incentive plans of the Company:
	Year Ended December 31		Stock			Weighted-			Weighted-Average			Aggregate
			Options/Shares			Average			Remaining Contractual			Intrinsic Value
						Exercise Price			Term			(in millions)
	2014
	Number outstanding at beginning of period			46,724,765		$	29.12
	Granted			1,246,451			40.32
	Exercised			(13,851,590	)		29.59
	Cancelled(a)			(470,428	)		31.12
	Number outstanding at end of period(b)			33,649,198		$	29.31			4		$	526
	Exercisable at end of period			28,923,260		$	28.79			3.4		$	467
	2013
	Number outstanding at beginning of period			63,171,918		$	28.83
	Granted			1,168,011			33.99
	Exercised			(17,260,740	)		28.41
	Cancelled(a)			(354,424	)		29.22
	Number outstanding at end of period(b)			46,724,765		$	29.12			4.4		$	527
	Exercisable at end of period			39,556,000		$	29.19			3.8		$	444
	2012
	Number outstanding at beginning of period			75,823,941		$	27.6
	Granted			4,180,492			28.65
	Exercised			(15,681,323	)		23.12
	Cancelled(a)			(1,151,192	)		24.9
	Number outstanding at end of period(b)			63,171,918		$	28.83			4.9		$	196
	Exercisable at end of period			50,671,654		$	30.12			4.2		$	92
	(a)	Options cancelled include both non-vested (i.e., forfeitures) and vested options.
	(b)	Outstanding options include stock-based awards that may be forfeited in future periods. The impact of the estimated forfeitures is reflected in compensation expense.
	Stock-based compensation expense is based on the estimated fair value of the award at the date of grant or modification. The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model, requiring the use of subjective assumptions. Because employee stock options have characteristics that differ from those of traded options, including vesting provisions and trading limitations that impact their liquidity, the determined value used to measure compensation expense may vary from the actual fair value of the employee stock options. The following table includes the weighted average estimated fair value of stock options granted and the assumptions utilized by the Company for newly issued grants:
	Year Ended December 31		2014			2013			2012
	Estimated fair value		$	11.38		$	12.13		$	10.19
	Risk-free interest rates			1.7	%		1	%		0.9	%
	Dividend yield			2.6	%		2.6	%		2.6	%
	Stock volatility factor			0.38			0.49			0.49
	Expected life of options (in years)			5.5			5.5			5.5
	Expected stock volatility is based on several factors including the historical volatility of the Company’s stock, implied volatility determined from traded options and other factors. The Company uses historical data to estimate option exercises and employee terminations to estimate the expected life of options. The risk-free interest rate for the expected life of the options is based on the U.S. Treasury yield curve in effect on the date of grant. The expected dividend yield is based on the Company’s expected dividend yield over the life of the options.
	The following summarizes certain stock option activity of the Company:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Fair value of options vested		$	33		$	41		$	49
	Intrinsic value of options exercised			171			144			143
	Cash received from options exercised			408			489			362
	Tax benefit realized from options exercised			66			56			75
	To satisfy option exercises, the Company predominantly uses treasury stock.
	Additional information regarding stock options outstanding as of December 31, 2014, is as follows:
			Outstanding Options									Exercisable Options
	Range of Exercise Prices		Shares			Weighted-			Weighted-			Shares		Weighted-
						Average			Average					Average
						Remaining			Exercise					Exercise
						Contractual			Price					Price
						Life (Years)
	$11.02 – $15.00			3,366,770			4.1		$	11.33			3,366,770	$	11.33
	$15.01 – $20.00			161,742			1.3			19.57			161,742		19.57
	$20.01 – $25.00			2,513,347			5.1			23.85			2,505,271		23.84
	$25.01 – $30.00			9,825,343			4.6			28.95			7,101,828		29.06
	$30.01 – $35.00			11,611,190			3.4			32.13			10,798,653		31.99
	$35.01 – $40.00			4,988,996			2.1			36.04			4,988,996		36.04
	$40.01 – $41.61			1,181,810			9.1			40.32			–		–
	Total			33,649,198			4		$	29.31			28,923,260	$	28.79
	RESTRICTED STOCK AND UNIT AWARDS
	A summary of the status of the Company’s restricted shares of stock and unit awards is presented below:
			2014						2013					2012
	Year Ended December 31		Shares			Weighted-			Shares			Weighted-		Shares			Weighted-
Average Grant-						Average Grant-						Average Grant-
Date Fair						Date Fair						Date Fair
Value						Value						Value
Outstanding at beginning of period			8,653,859		$	29.96			8,935,743		$	25.04		8,995,295		$	22.46
Granted			3,133,168			40.37			3,717,635			33.88		3,085,077			28.7
Vested			(3,409,650	)		29.38			(3,744,411	)		22.17		(2,931,820	)		20.97
Cancelled			(455,806	)		34.05			(255,108	)		29.18		(212,809	)		25.01
Outstanding at end of period			7,921,571		$	34.09			8,653,859		$	29.96		8,935,743		$	25.04
The total fair value of shares vested was $139 million, $127 million and $86 million for the years ended December 31, 2014, 2013 and 2012, respectively. Stock-based compensation expense was $125 million, $129 million and $129 million for the years ended December 31, 2014, 2013 and 2012, respectively. On an after-tax basis, stock-based compensation was $78 million, $80 million and $80 million for the years ended December 31, 2014, 2013 and 2012, respectively. As of December 31, 2014, there was $167 million of total unrecognized compensation cost related to nonvested share-based arrangements granted under the plans. That cost is expected to be recognized over a weighted-average period of 2.4 years as compensation expense.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 19    INCOME TAXES
	The components of income tax expense were:
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Federal
	Current	$	1,888		$	1,885		$	1,853
	Deferred		(126	)		(83	)		45
	Federal income tax		1,762			1,802			1,898
	State
	Current		331			216			334
	Deferred		(6	)		14			4
	State income tax		325			230			338
	Total income tax provision	$	2,087		$	2,032		$	2,236
	A reconciliation of expected income tax expense at the federal statutory rate of 35 percent to the Company’s applicable income tax expense follows:
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Tax at statutory rate	$	2,798		$	2,717		$	2,704
	State income tax, at statutory rates, net of federal tax benefit		211			150			220
	Tax effect of
	Tax credits and benefits, net of related expenses		(701	)		(648	)		(479	)
	Tax-exempt income		(205	)		(212	)		(219	)
	Noncontrolling interests		(20	)		37			55
	Other items		4			(12	)		(45	)
	Applicable income taxes	$	2,087		$	2,032		$	2,236
	The tax effects of fair value adjustments on securities available-for-sale, derivative instruments in cash flow hedges, foreign currency translation adjustments, pension and post-retirement plans and certain tax benefits related to stock options are recorded directly to shareholders’ equity as part of other comprehensive income (loss).
	In preparing its tax returns, the Company is required to interpret complex tax laws and regulations and utilize income and cost allocation methods to determine its taxable income. On an ongoing basis, the Company is subject to examinations by federal, state, local and foreign taxing authorities that may give rise to differing interpretations of these complex laws, regulations and methods. Due to the nature of the examination process, it generally takes years before these examinations are completed and matters are resolved. Federal tax examinations for all years ending through December 31, 2010, are completed and resolved. The Company’s tax returns for the years ended December 31, 2011 and 2012 are under examination by the Internal Revenue Service. The years open to examination by state and local government authorities vary by jurisdiction.
	A reconciliation of the changes in the federal, state and foreign unrecognized tax position balances are summarized as follows:
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Balance at beginning of period	$	264		$	302		$	479
	Additions for tax positions taken in prior years		31			44			73
	Additions for tax positions taken in the current year		4			–			5
	Exam resolutions		(22	)		(56	)		(245	)
	Statute expirations		(10	)		(26	)		(10	)
	Balance at end of period	$	267		$	264		$	302
	The total amount of unrecognized tax positions that, if recognized, would impact the effective income tax rate as of December 31, 2014, 2013 and 2012, were $192 million, $181 million and $240 million, respectively. The Company classifies interest and penalties related to unrecognized tax positions as a component of income tax expense. At December 31, 2014, the Company’s unrecognized tax position balance included $31 million in accrued interest. During the years ended December 31, 2014, 2013 and 2012 the Company recorded approximately $4 million, $(12) million and $(8) million, respectively, in interest on unrecognized tax positions.
	U.S. BANCORP	The power of potential
	While certain examinations may be concluded, statutes may lapse or other developments may occur, the Company does not believe there will be a significant increase or decrease in uncertain tax positions over the next twelve months.
	Deferred income tax assets and liabilities reflect the tax effect of estimated temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for the same items for income tax reporting purposes.
	The significant components of the Company’s net deferred tax asset (liability) follows:
	At December 31 (Dollars in Millions)	2014			2013
	Deferred Tax Assets
	Allowance for credit losses	$	1,652		$	1,722
	Accrued expenses		630			485
	Pension and postretirement benefits		437			277
	Federal, state and foreign net operating loss carryforwards		212			72
	Stock compensation		143			165
	Securities available-for-sale and financial instruments		–			172
	Partnerships and other investment assets		403			646
	Other deferred tax assets, net		208			179
	Gross deferred tax assets		3,685			3,718
	Deferred Tax Liabilities
	Leasing activities		(3,042	)		(2,872	)
	Mortgage servicing rights		(871	)		(835	)
	Goodwill and other intangible assets		(772	)		(666	)
	Loans		(212	)		(211	)
	Securities available-for-sale and financial instruments		(165	)		–
	Fixed assets		(90	)		(147	)
	Other deferred tax liabilities, net		(159	)		(210	)
	Gross deferred tax liabilities		(5,311	)		(4,941	)
	Valuation allowance		(101	)		(82	)
	Net Deferred Tax Asset (Liability)	$	(1,727	)	$	(1,305	)
	The Company has approximately $921 million of federal, state and foreign net operating loss carryforwards which expire at various times through 2034. A substantial portion of these carryforwards relate to state-only net operating losses. These carryforwards are subject to a full valuation allowance. Management has determined it is more likely than not the other net deferred tax assets could be realized through carry back to taxable income in prior years, future reversals of existing taxable temporary differences and future taxable income.
	At December 31, 2014, retained earnings included approximately $102 million of base year reserves of acquired thrift institutions, for which no deferred federal income tax liability has been recognized. These base year reserves would be recaptured if the Company’s banking subsidiaries cease to qualify as a bank for federal income tax purposes. The base year reserves also remain subject to income tax penalty provisions that, in general, require recapture upon certain stock redemptions of, and excess distributions to, stockholders.

Derivative_Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	NOTE 20    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 year ended December 31, 2014, and the change in fair value attributed to hedge ineffectiveness was not material.
	Cash Flow Hedges These derivatives are interest rate swaps the Company uses to hedge the forecasted cash flows from its underlying variable-rate loans and debt. Changes in the fair value of derivatives designated as cash flow hedges are recorded in other comprehensive income (loss) until the cash flows of the hedged items are realized. If a derivative designated as a cash flow hedge is terminated or ceases to be highly effective, the gain or loss in other comprehensive income (loss) is amortized to earnings over the period the forecasted hedged transactions impact earnings. If a hedged forecasted transaction is no longer probable, hedge accounting is ceased and any gain or loss included in other comprehensive income (loss) is reported in earnings immediately, unless the forecasted transaction is at least reasonably possible of occurring, whereby the amounts remain within other comprehensive income (loss). At December 31, 2014, the Company had $172 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 next 12 months is a loss of $115 million (net-of-tax). This amount includes gains and losses related to hedges that were terminated early for which the forecasted transactions are still probable. All cash flow hedges were highly effective for the year ended December 31, 2014, and the change in fair value attributed to hedge ineffectiveness was not material.
	Net Investment Hedges The Company uses forward commitments to sell specified amounts of certain foreign currencies, and occasionally non-derivative debt instruments, to hedge the volatility of its investment in foreign operations driven by fluctuations in foreign currency exchange rates. The ineffectiveness on all net investment hedges was not material for the year ended December 31, 2014. There were no non-derivative debt instruments designated as net investment hedges at December 31, 2014 or 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 23 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-Average			Notional			Fair			Weighted-Average
			Value			Value			Remaining			Value			Value			Remaining
									Maturity									Maturity
									In Years									In Years
	December 31, 2014
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	2,750		$	65			5.69		$	–		$	–			–
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			272			6			7.76			5,748			315			1.94
	Receive fixed/pay floating swaps			250			–			0.16			–			–			–
	Net investment hedges
	Foreign exchange forward contracts			1,047			31			0.04			–			–			–
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			4,839			45			0.07			60			–			0.08
	Sell			448			10			0.13			6,713			62			0.09
	Options
	Purchased			2,500			–			0.06			–			–			–
	Written			2,643			31			0.08			4			–			0.11
	Receive fixed/pay floating swaps			3,552			14			10.22			250			1			10.22
	Pay fixed/receive floating swaps			15			–			10.22			–			–			–
	Foreign exchange forward contracts			510			3			0.03			6,176			41			0.02
	Equity contracts			86			3			0.6			–			–			–
	Credit contracts			1,247			3			3.29			2,282			5			2.85
	Other(a)			58			4			0.03			390			48			3.2
	Total		$	20,217		$	215					$	21,623		$	472
	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 $58 million at December 31, 2014, and derivative liability swap agreements related to the sale of a portion of the Company’s Class B common shares of Visa Inc. The Visa swap agreements had a total notional value, fair value and weighted average remaining maturity of $332 million, $44 million and 3.75 years at December 31, 2014, respectively.
	The following table summarizes the customer-related derivative positions of the Company:
			Asset Derivatives									Liability Derivatives
(Dollars in Millions)		Notional			Fair			Weighted-Average			Notional			Fair			Weighted-Average
		Value			Value			Remaining			Value			Value			Remaining
								Maturity									Maturity
								In Years									In Years
December 31, 2014
Interest rate contracts
Receive fixed/pay floating swaps		$	21,724		$	888			6.09		$	5,880		$	24			3.79
Pay fixed/receive floating swaps			4,622			26			3.27			21,821			892			6.08
Options
Purchased			4,409			10			3.79			24			–			2.42
Written			24			–			2.42			4,375			10			3.79
Futures
Buy			1,811			–			0.22			226			–			0.45
Sell			152			–			1.08			46			–			1.73
Foreign exchange rate contracts
Forwards, spots and swaps			17,062			890			0.52			14,645			752			0.59
Options
Purchased			976			39			0.44			–			–			–
Written			–			–			–			976			39			0.44
Total		$	50,780		$	1,853					$	47,993		$	1,717
December 31, 2013
Interest rate contracts
Receive fixed/pay floating swaps		$	11,717		$	600			5.11		$	7,291		$	106			5.57
Pay fixed/receive floating swaps			6,746			114			6.03			12,361			560			4.9
Options
Purchased			3,489			33			4.53			–			–			–
Written			–			–			–			3,489			33			4.53
Foreign exchange rate contracts
Forwards, spots and swaps			10,970			457			0.59			9,975			427			0.62
Options
Purchased			364			11			0.53			–			–			–
Written			–			–			–			364			11			0.53
Total		$	33,286		$	1,215					$	33,480		$	1,137
The table below shows the effective portion of the gains (losses) recognized in other comprehensive income (loss) and the gains (losses) reclassified from other comprehensive income (loss) into earnings (net-of-tax) for the years ended December 31:
		Gains (Losses) Recognized in Other									Gains (Losses) Reclassified from
		Comprehensive Income (Loss)									Other Comprehensive Income (Loss)
											into Earnings
(Dollars in Millions)		2014			2013			2012			2014			2013			2012
Asset and Liability Management Positions
Cash flow hedges
Interest rate contracts(a)		$	(26	)	$	25		$	(46	)	$	(115	)	$	(118	)	$	(131	)
Net investment hedges
Foreign exchange forward contracts			130			(45	)		(19	)		–			–			–
Non-derivative debt instruments			–			–			20			–			–			–
Note:	Ineffectiveness on cash flow and net investment hedges was not material for the years ended December 31, 2014, 2013 and 2012.
(a)	Gains (Losses) reclassified from other comprehensive income (loss) into interest income on loans and interest expense on long-term debt.
The table below shows the gains (losses) recognized in earnings for fair value hedges, other economic hedges and the customer-related positions for the years ended December 31:
(Dollars in Millions)		Location of Gains (Losses)			2014			2013			2012
		Recognized in Earnings
Asset and Liability Management Positions
Fair value hedges(a)
Interest rate contracts			Other noninterest income		$	29		$	(9	)	$	3
Foreign exchange cross-currency swaps			Other noninterest income			–			–			42
Other economic hedges
Interest rate contracts
Futures and forwards			Mortgage banking revenue			(122	)		615			437
Purchased and written options			Mortgage banking revenue			287			243			854
Receive fixed/pay floating swaps			Mortgage banking revenue			384			(322	)		175
Foreign exchange forward contracts			Commercial products revenue			(29	)		49			(63	)
Equity contracts			Compensation expense			2			2			2
Credit contracts			Other noninterest income/expense			–			6			(8	)
Other			Other noninterest income/expense			(43	)		–			–
Customer-Related Positions
Interest rate contracts
Receive fixed/pay floating swaps			Other noninterest income			686			(361	)		(118	)
Pay fixed/receive floating swaps			Other noninterest income			(652	)		378			124
Foreign exchange rate contracts
Forwards, spots and swaps			Commercial products revenue			66			51			50
Purchased and written options			Commercial products revenue			1			–			–
(a)	Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $(27) million, $8 million and $(3) million for the years ended December 31, 2014, 2013 and 2012, respectively. Gains (Losses) on items hedged by foreign exchange forward contracts included in noninterest income (expense), were $(44) million for the year ended December 31, 2012. The ineffective portion was immaterial for the years ended December 31, 2014, 2013 and 2012.
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 December 31, 2014, was $964 million. At December 31, 2014, the Company had $842 million of cash posted as collateral against this net liability position.

Netting_Arrangements_for_Certa

Netting Arrangements for Certain Financial Instruments	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Netting Arrangements for Certain Financial Instruments	NOTE 21    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 $140.6 billion total notional amount of derivative positions at December 31, 2014, $33.0 billion related to those centrally cleared through clearinghouses and $4.2 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 20 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)
	December 31, 2014
	Derivative assets(d)		$	1,847	$	(870	)	$	977	$	(58	)	$	–		$	919
	Reverse repurchase agreements			40		–			40		(40	)		–			–
	Securities borrowed			638		–			638		–			(620	)		18
	Total		$	2,525	$	(870	)	$	1,655	$	(98	)	$	(620	)	$	937
	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 $258 million and $124 million of cash collateral related payables that were netted against derivative assets at December 31, 2014 and 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 $221 million and $55 million of derivative assets centrally cleared or otherwise not subject to netting arrangements at December 31, 2014 and 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 Amount
										Instruments(b)			Pledged(c)
	December 31, 2014
	Derivative liabilities(d)		$	1,847	$	(1,317	)	$	530	$	(58	)	$	–		$	472
	Repurchase agreements			948		–			948		(40	)		(908	)		–
	Securities loaned			47		–			47		–			(46	)		1
	Total		$	2,842	$	(1,317	)	$	1,525	$	(98	)	$	(954	)	$	473
	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 $705 million and $717 million of cash collateral related receivables that were netted against derivative liabilities at December 31, 2014 and 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 $342 million and $119 million of derivative liabilities centrally cleared or otherwise not subject to netting arrangements at December 31, 2014 and 2013, respectively.

Fair_Values_of_Assets_and_Liab

Fair Values of Assets and Liabilities	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities	NOTE 22    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 securities, as well as exchange-traded instruments, including certain perpetual preferred and corporate debt securities.
	–		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 years ended December 31, 2014, 2013 and 2012, 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 years ended December 31, 2014, 2013 and 2012, 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 include U.S. Treasury and exchange-traded 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 certain 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 $185 million net gain, a $335 million net loss and a $287 million net gain for the years ended December 31, 2014, 2013 and 2012, 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, and 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 10 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”). 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. Management reviews and updates the Visa swaps fair value in conjunction with its review of Visa related litigation contingencies, and the associated escrow funding. The fair value of the Visa swaps are calculated by the Company’s corporate development department 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. 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. Refer to Note 23 for further information on the Visa restructuring and related card association litigation.
	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 8 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 December 31, 2014:
			Minimum			Maximum			Average
	Residential Prime Non-Agency Mortgage-Backed Securities(a)
	Estimated lifetime prepayment rates			6	%		22	%		14	%
	Lifetime probability of default rates			–			7			4
	Lifetime loss severity rates			15			60			34
	Discount margin			2			5			3
	Residential Non-Prime Non-Agency Mortgage-Backed Securities(b)
	Estimated lifetime prepayment rates			3	%		10	%		7	%
	Lifetime probability of default rates			4			14			7
	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 December 31, 2014:
			Minimum			Maximum			Average
	Expected prepayment			11	%		21	%		12	%
	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 December 31, 2014:
			Minimum			Maximum			Average
	Expected loan close rate			38	%		100	%		76	%
	Inherent MSR value (basis points per loan)			45			203			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 December 31, 2014, the minimum, maximum and average credit valuation adjustment as a percentage of the derivative contract fair value prior to adjustment was 0 percent, 97 percent and 6 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
	December 31, 2014
Available-for-sale securities
U.S. Treasury and agencies		$	1,351		$	1,281		$	–		$	–		$	2,632
Mortgage-backed securities
Residential
Agency			–			45,017			–			–			45,017
Non-agency
Prime(a)			–			–			405			–			405
Non-prime(b)			–			–			280			–			280
Commercial
Agency			–			115			–			–			115
Asset-backed securities
Collateralized debt obligations/Collateralized loan obligations			–			22			–			–			22
Other			–			557			62			–			619
Obligations of state and political subdivisions			–			5,868			–			–			5,868
Obligations of foreign governments			–			6			–			–			6
Corporate debt securities			101			504			9			–			614
Perpetual preferred securities			55			162			–			–			217
Other investments			251			23			–			–			274
Total available-for-sale			1,758			53,555			756			–			56,069
Mortgage loans held for sale			–			4,774			–			–			4,774
Mortgage servicing rights			–			–			2,338			–			2,338
Derivative assets			–			1,408			660			(870	)		1,198
Other assets			231			641			–			–			872
Total		$	1,989		$	60,378		$	3,754		$	(870	)	$	65,251
Derivative liabilities		$	–		$	2,103		$	86		$	(1,317	)	$	872
Short-term borrowings(c)			101			608			–			–			709
Total		$	101		$	2,711		$	86		$	(1,317	)	$	1,581
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 years ended December 31:
(Dollars in Millions)		Beginning			Net Gains			Net			Purchases			Sales			Principal			Issuances			Settlements			End of		Net Change
		of Period			(Losses)			Gains									Payments									Period		in Unrealized
		Balance			Included in			(Losses)																		Balance		Gains
					Net			Included																				(Losses)
					Income			in Other																				Relating to
								Compre-																				Assets and
								hensive																				Liabilities
								Income																				Still Held at
								(Loss)																				End of
																												Period
2014
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime(a)		$	478		$	–		$	15		$	–		$	–		$	(88	)	$	–		$	–		$	405	$	14
Non-prime(b)			297			(6	)		19			–			–			(30	)		–			–			280		19
Asset-backed securities
Other			63			4			–			5			–			(10	)		–			–			62		–
Corporate debt securities			9			–			–			–			–			–			–			–			9		–
Total available-for-sale			847			(2	)(c)		34	(f)		5			–			(128	)		–			–			756		33
Mortgage servicing rights			2,680			(588	)(d)		–			5			(141	)		–			382	(g)		–			2,338		(588	)(d)
Net derivative assets and liabilities			445			904	(e)		–			1			(4	)		–			–			(772	)		574		188	(h)
2013
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime(a)		$	624		$	(6	)	$	8		$	–		$	–		$	(148	)	$	–		$	–		$	478	$	9
Non-prime(b)			355			(13	)		17			–			(20	)		(42	)		–			–			297		17
Asset-backed securities
Other			15			3			1			51			–			(7	)		–			–			63		–
Corporate debt securities			9			–			–			–			–			–			–			–			9		–
Total available-for-sale			1,003			(16	)(i)		26	(f)		51			(20	)		(197	)		–			–			847		26
Mortgage servicing rights			1,700			203	(d)		–			8			–			–			769	(g)		–			2,680		203	(d)
Net derivative assets and liabilities			1,179			(18	)(j)		–			1			(5	)		–			–			(712	)		445		(321	)(k)
2012
Available-for-sale securities
Mortgage-backed securities
Residential non-agency
Prime(a)		$	803		$	(10	)	$	91		$	–		$	(109	)	$	(151	)	$	–		$	–		$	624	$	65
Non-prime(b)			802			(24	)		228			–			(562	)		(89	)		–			–			355		80
Commercial non-agency			42			1			–			–			(38	)		(5	)		–			–			–		–
Asset-backed securities
Collateralized debt obligations/Collateralized loan obligations			120			13			(8	)		–			(104	)		(21	)		–			–			–		–
Other			117			7			–			3			(93	)		(19	)		–			–			15		2
Corporate debt securities			9			–			–			–			–			–			–			–			9		–
Total available-for-sale			1,893			(13	)(l)		311	(f)		3			(906	)		(285	)		–			–			1,003		147
Mortgage servicing rights			1,519			(818	)(d)		–			42			–			–			957	(g)		–			1,700		(818	)(d)
Net derivative assets and liabilities			1,228			2,398	(m)		–			3			(5	)		–			–			(2,445	)		1,179		150	(n)
(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)	Approximately $(3) million included in securities gains (losses) and $1 million included in interest income.
(d)	Included in mortgage banking revenue.
(e)	Approximately $404 million included in other noninterest income and $500 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 $128 million included in other noninterest income and $60 million included in mortgage banking revenue.
(i)	Approximately $(14) million included in securities gains (losses) and $(2) million included in interest income.
(j)	Approximately $(149) million included in other noninterest income and $131 million included in mortgage banking revenue.
(k)	Approximately $(340) million included in other noninterest income and $19 million included in mortgage banking revenue.
(l)	Approximately $(47) million included in securities gains (losses) and $34 million included in interest income.
(m)	Approximately $359 million included in other noninterest income and $2.0 billion included in mortgage banking revenue.
(n)	Approximately $(109) million included in other noninterest income and $259 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 as of December 31:
		2014												2013
(Dollars in Millions)		Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3			Total
Loans(a)		$	–		$	–		$	77		$	77		$	–		$	–		$	128		$	128
Other assets(b)			–			–			90			90			–			–			150			150
(a)	Represents the carrying value of loans for which adjustments were based on the fair value of the collateral, excluding loans fully charged-off.
(b)	Primarily represents the fair value of foreclosed properties that were measured at fair value based on an appraisal or broker price opinion of the collateral subsequent to their initial acquisition.
The following table summarizes losses recognized related to nonrecurring fair value measurements of individual assets or portfolios for the years ended December 31:
(Dollars in Millions)		2014			2013			2012
Loans(a)		$	108		$	83		$	68
Other assets(b)			70			96			160
(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 as of December 31:
		2014									2013
(Dollars in Millions)		Fair Value			Aggregate			Carrying			Fair Value			Aggregate			Carrying
		Carrying			Unpaid			Amount Over			Carrying			Unpaid			Amount Over
		Amount			Principal			(Under) Unpaid			Amount			Principal			(Under) Unpaid
								Principal									Principal
Total loans		$	4,774		$	4,582		$	192		$	3,263		$	3,195		$	68
Nonaccrual loans			6			9			(3	)		9			14			(5	)
Loans 90 days or more past due			1			1			–			–			–			–
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS
The following table summarizes the estimated fair value for financial instruments as of December 31, 2014 and 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 as of December 31, are shown in the table below:
		2014															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		$	10,654		$	10,654		$	–		$	–		$	10,654		$	8,477		$	8,477		$	–		$	–	$	8,477
Federal funds sold and securities purchased under resale agreements			118			–			118			–			118			163			–			163			–		163
Investment securities held-to-maturity			44,974			1,928			43,124			88			45,140			38,920			2,589			35,678			101		38,368
Loans held for sale(a)			18			–			–			18			18			5			–			–			5		5
Loans(b)			243,735			–			–			245,424			245,424			230,857			–			–			231,480		231,480
Other financial instruments			2,187			–			924			1,269			2,193			2,443			–			1,080			1,383		2,463
Financial Liabilities
Deposits			282,733			–			282,708			–			282,708			262,123			–			262,200			–		262,200
Short-term borrowings(c)			29,184			–			28,973			–			28,973			26,945			–			26,863			–		26,863
Long-term debt			32,260			–			32,659			–			32,659			20,049			–			20,391			–		20,391
Other liabilities			1,231			–			–			1,231			1,231			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, deferred non-yield related loan fees and standby letters of credit was $413 million and $382 million at December 31, 2014 and 2013, respectively. The carrying value of other guarantees was $211 million and $278 million at December 31, 2014 and 2013, respectively.

Guarantees_and_Contingent_Liab

Guarantees and Contingent Liabilities	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Guarantees and Contingent Liabilities	NOTE 23    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 December 31, 2014, the carrying amount of the Company’s liability related to the Visa Litigation matters, net of its share of the escrow fundings, was $19 million. During 2014, the Company sold 3.8 million of its Class B shares. These sales do not impact the Company’s liability for the Visa Litigation matters or the receivable related to the escrow account. The remaining 8.9 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 22.
	Commitments to Extend Credit Commitments to extend credit are legally binding and generally have fixed expiration dates or other termination clauses. The contractual amount represents the Company’s exposure to credit loss, in the event of default by the borrower. The Company manages this credit risk by using the same credit policies it applies to loans. Collateral is obtained to secure commitments based on management’s credit assessment of the borrower. The collateral may include marketable securities, receivables, inventory, equipment and real estate. Since the Company expects many of the commitments to expire without being drawn, total commitment amounts do not necessarily represent the Company’s future liquidity requirements. In addition, the commitments include consumer credit lines that are cancelable upon notification to the consumer.
	The contract or notional amounts of unfunded commitments to extend credit at December 31, 2014, excluding those commitments considered derivatives, were as follows:
			Term
	(Dollars in Millions)		Less Than			Greater Than			Total
			One Year			One Year
	Commercial and commercial real estate		$	24,161		$	89,108		$	113,269
	Corporate and purchasing cards(a)			21,301			–			21,301
	Residential mortgages			70			14			84
	Retail credit cards(a)			78,578			190			78,768
	Other retail			12,217			19,276			31,493
	Covered			–			667			667
	Federal funds			5,258			–			5,258
	(a)	Primarily cancelable at the Company’s discretion.
	Lease Commitments Rental expense for operating leases totaled $326 million in 2014, $311 million in 2013 and $295 million in 2012. Future minimum payments, net of sublease rentals, under capitalized leases and noncancelable operating leases with initial or remaining terms of one year or more, consisted of the following at December 31, 2014:
	(Dollars in Millions)		Capitalized			Operating
			Leases			Leases
	2015		$	13		$	265
	2016			12			238
	2017			10			206
	2018			10			166
	2019			8			134
	Thereafter			34			503
	Total minimum lease payments			87		$	1,512
	Less amount representing interest			31
	Present value of net minimum lease payments		$	56
	OTHER GUARANTEES AND CONTINGENT LIABILITIES
	The following table is a summary of other guarantees and contingent liabilities of the Company at December 31, 2014:
	(Dollars in Millions)		Collateral			Carrying			Maximum
			Held			Amount			Potential
									Future
									Payments
	Standby letters of credit		$	–		$	58		$	14,838
	Third party borrowing arrangements			–			–			10
	Securities lending indemnifications			4,649			–			4,514
	Asset sales			–			145			4,271
	Merchant processing			522			58			89,652
	Contingent consideration arrangements			–			2			2
	Tender option bond program guarantee			2,870			–			2,719
	Minimum revenue guarantees			–			6			6
	Other			–			–			502
	Letters of Credit Standby letters of credit are commitments the Company issues to guarantee the performance of a customer to a third party. The guarantees frequently support public and private borrowing arrangements, including commercial paper issuances, bond financings and other similar transactions. The Company issues commercial letters of credit on behalf of customers to ensure payment or collection in connection with trade transactions. In the event of a customer’s nonperformance, the Company’s credit loss exposure is the same as in any extension of credit, up to the letter’s contractual amount. Management assesses the borrower’s credit to determine the necessary collateral, which may include marketable securities, receivables, inventory, equipment and real estate. Since the conditions requiring the Company to fund letters of credit may not occur, the Company expects its liquidity requirements to be less than the total outstanding commitments. The maximum potential future payments guaranteed by the Company under standby letter of credit arrangements at December 31, 2014, were approximately $14.8 billion with a weighted-average term of approximately 21 months. The estimated fair value of standby letters of credit was approximately $58 million at December 31, 2014.
	The contract or notional amount of letters of credit at December 31, 2014, were as follows:
			Term
	(Dollars in Millions)		Less Than			Greater			Total
			One Year			Than
						One Year
	Standby		$	6,757		$	8,081		$	14,838
	Commercial			354			53			407
	Guarantees Guarantees are contingent commitments issued by the Company to customers or other third parties. The Company’s guarantees primarily include parent guarantees related to subsidiaries’ third party borrowing arrangements; third party performance guarantees inherent in the Company’s business operations, such as indemnified securities lending programs and merchant charge-back guarantees; indemnification or buy-back provisions related to certain asset sales; and contingent consideration arrangements related to acquisitions. For certain guarantees, the Company has recorded a liability related to the potential obligation, or has access to collateral to support the guarantee or through the exercise of other recourse provisions can offset some or all of the maximum potential future payments made under these guarantees.
	Third Party Borrowing Arrangements The Company provides guarantees to third parties as a part of certain subsidiaries’ borrowing arrangements. The maximum potential future payments guaranteed by the Company under these arrangements were approximately $10 million at December 31, 2014.
	Commitments from Securities Lending The Company participates in securities lending activities by acting as the customer’s agent involving the loan of securities. The Company indemnifies customers for the difference between the fair value of the securities lent and the fair value of the collateral received. Cash collateralizes these transactions. The maximum potential future payments guaranteed by the Company under these arrangements were approximately $4.5 billion at December 31, 2014, and represented the fair value of the securities lent to third parties. At December 31, 2014, the Company held $4.6 billion of cash as collateral for these arrangements.
	Asset Sales The Company has provided guarantees to certain third parties in connection with the sale or syndication of certain assets, primarily loan portfolios and tax-advantaged investments. These guarantees are generally in the form of asset buy-back or make-whole provisions that are triggered upon a credit event or a change in the tax-qualifying status of the related projects, as applicable, and remain in effect until the loans are collected or final tax credits are realized, respectively. The maximum potential future payments guaranteed by the Company under these arrangements were approximately $4.3 billion at December 31, 2014, and represented the proceeds received from the buyer or the guaranteed portion in these transactions where the buy-back or make-whole provisions have not yet expired. At December 31, 2014, the Company had reserved $99 million for potential losses related to the sale or syndication of tax- advantaged investments.
	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.
	The Company regularly sells loans to GSEs as part of its mortgage banking activities. The Company provides customary representations 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 December 31, 2014, the Company had reserved $46 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:
	Year Ended December 31		2014			2013			2012
	(Dollars in Millions)
	Balance at beginning of period		$	83		$	240		$	160
	Net realized losses			(28	)		(115	)		(120	)
	Change in reserve			(9	)		(42	)		200
	Balance at end of period		$	46		$	83		$	240
As of December 31, 2014 and 2013, the Company had $19 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.
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.
A cardholder, through its issuing bank, generally has until the later of up to four months after the date the transaction is processed or the receipt of the product or service to present a charge-back to the Company as the merchant processor. The absolute maximum potential liability is estimated to be the total volume of credit card transactions that meet the associations’ requirements to be valid charge-back transactions at any given time. Management estimates that the maximum potential exposure for charge-backs would approximate the total amount of merchant transactions processed through the credit card associations for the last four months. For the last four months this amount totaled approximately $89.7 billion. In most cases, this contingent liability is unlikely to arise, as most products and services are delivered when purchased and amounts are refunded when items are returned to merchants. However, where the product or service is not provided until a future date (“future delivery”), the potential for this contingent liability increases. To mitigate this risk, the Company may require the merchant to make an escrow deposit, place maximum volume limitations on future delivery transactions processed by the merchant at any point in time, or require various credit enhancements (including letters of credit and bank guarantees). Also, merchant processing contracts may include event triggers to provide the Company more financial and operational control in the event of financial deterioration of the merchant.
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 December 31, 2014, the value of airline tickets purchased to be delivered at a future date was $5.2 billion. The Company held collateral of $429 million in escrow deposits, letters of credit and indemnities from financial institutions, and liens on various assets. With respect to future delivery risk for other merchants, the Company held $23 million of merchant escrow deposits as collateral. In addition to specific collateral or other credit enhancements, the Company maintains a liability for its implied guarantees associated with future delivery. At December 31, 2014, the liability was $48 million primarily related to these airline processing arrangements.
In the normal course of business, the Company has unresolved charge-backs. The Company assesses the likelihood of its potential liability based on the extent and nature of unresolved charge-backs and its historical loss experience. At December 31, 2014, the Company held $70 million of merchant escrow deposits as collateral and had a recorded liability for potential losses of $10 million.
Contingent Consideration Arrangements The Company has contingent payment obligations related to certain business combination transactions. Payments are guaranteed as long as certain post-acquisition performance-based criteria are met or customer relationships are maintained. At December 31, 2014, the maximum potential future payments required to be made by the Company under these arrangements was approximately $2 million. If required, the majority of these contingent payments are payable within the next 12 months.
Tender Option Bond Program Guarantee As discussed in Note 8, the Company sponsors a municipal bond securities tender option bond program and consolidates the program’s entities on its Consolidated Balance Sheet. The Company provides financial performance guarantees related to the program’s entities. At December 31, 2014, the Company guaranteed $2.7 billion of borrowings of the program’s entities, included on the Consolidated Balance Sheet in short-term borrowings. The Company also included on its Consolidated Balance Sheet the related $2.9 billion of available-for-sale investment securities serving as collateral for this arrangement.
Minimum Revenue Guarantees In the normal course of business, the Company may enter into revenue share agreements with third party business partners who generate customer referrals or provide marketing or other services related to the generation of revenue. In certain of these agreements, the Company may guarantee that a minimum amount of revenue share payments will be made to the third party over a specified period of time. At December 31, 2014, the maximum potential future payments required to be made by the Company under these agreements were $6 million and the Company had recorded a related liability of $6 million.
Other Guarantees and Commitments The Company has also made other financial performance guarantees and commitments related to the operations of its subsidiaries. At December 31, 2014, the maximum potential future payments guaranteed or committed by the Company under these arrangements were approximately $502 million.
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.
Litigation Matters In the last several years, the Company and other large financial institutions have been sued in their capacity as trustee for residential mortgage–backed securities trusts. Among these lawsuits are actions brought in June 2014 by a group of institutional investors against six bank trustees, including the Company. In BlackRock Allocation Target Shares: Series S Portfolio, et al. v. U.S. Bank National Association, et al. filed on June 18, 2014 in the Supreme Court of the State of New York, New York County, and then refiled on November 24, 2014 in the United States District Court for the Southern District of New York (where it is now pending), the investors allege that U.S. Bank National Association as trustee caused them to incur losses by failing to enforce loan repurchase obligations and failing to abide by appropriate standards of care after events of default allegedly occurred. In the lawsuit, the plaintiffs seek monetary damages in an unspecified amount and also seek equitable relief.
Regulatory Matters 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 Bank Secrecy Act 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 and decrease its revenue).
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).
In April 2011, the Company and certain other large financial institutions entered into Consent Orders with U.S. federal banking regulators relating to residential mortgage servicing and foreclosure practices. These regulators will determine whether any of the institutions will be released from the Consent Orders, based on their compliance with the Consent Orders’ provisions. If the federal regulators determine that the Company has not appropriately addressed the requirements of the Consent Orders, the Company could be required to enter into further orders and settlements, pay additional fines or penalties, make restitution or further modify the Company’s business practices (which may increase the Company’s operating expenses and decrease its revenue).
Outlook 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 condition, results of operations or cash flows. 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.

US_Bancorp_Parent_Company

U.S. Bancorp (Parent Company)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
U.S. Bancorp (Parent Company)	NOTE 24    U.S. BANCORP (PARENT COMPANY)
	CONDENSED BALANCE SHEET
	At December 31 (Dollars in Millions)	2014			2013
	Assets
	Due from banks, principally interest-bearing	$	10,775		$	8,371
	Available-for-sale securities		464			463
	Investments in bank subsidiaries		39,599			37,558
	Investments in nonbank subsidiaries		1,906			1,546
	Advances to bank subsidiaries		2,650			2,250
	Advances to nonbank subsidiaries		550			1,534
	Other assets		1,762			1,628
	Total assets	$	57,706		$	53,350
	Liabilities and Shareholders’ Equity
	Short-term funds borrowed	$	177		$	138
	Long-term debt		13,189			11,416
	Other liabilities		861			683
	Shareholders’ equity		43,479			41,113
	Total liabilities and shareholders’ equity	$	57,706		$	53,350
	CONDENSED STATEMENT OF INCOME
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Income
	Dividends from bank subsidiaries	$	3,850		$	6,100		$	250
	Dividends from nonbank subsidiaries		38			9			4
	Interest from subsidiaries		123			118			96
	Other income		64			66			149
	Total income		4,075			6,293			499
	Expense
	Interest expense		335			325			393
	Other expense		90			81			122
	Total expense		425			406			515
	Income (loss) before income taxes and equity in undistributed income of subsidiaries		3,650			5,887			(16	)
	Applicable income taxes		(94	)		(88	)		(85	)
	Income of parent company		3,744			5,975			69
	Equity in undistributed income (losses) of subsidiaries		2,107			(139	)		5,578
	Net income attributable to U.S. Bancorp	$	5,851		$	5,836		$	5,647
	CONDENSED STATEMENT OF CASH FLOWS
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Operating Activities
	Net income attributable to U.S. Bancorp	$	5,851		$	5,836		$	5,647
	Adjustments to reconcile net income to net cash provided by operating activities
	Equity in undistributed (income) losses of subsidiaries		(2,107	)		139			(5,578	)
	Other, net		48			(40	)		(35	)
	Net cash provided by operating activities		3,792			5,935			34
	Investing Activities
	Proceeds from sales and maturities of investment securities		46			75			979
	Purchases of investment securities		(39	)		(118	)		(35	)
	Equity distributions from subsidiaries		–			12			845
	Net decrease in short-term advances to subsidiaries		984			4,543			207
	Long-term advances to subsidiaries		(1,800	)		(750	)		(500	)
	Principal collected on long-term advances to subsidiaries		1,400			–			–
	Other, net		(52	)		(9	)		(22	)
	Net cash provided by investing activities		539			3,753			1,474
	Financing Activities
	Net increase in short-term borrowings		39			4			105
	Proceeds from issuance of long-term debt		3,250			1,500			3,550
	Principal payments or redemption of long-term debt		(1,500	)		(2,850	)		(5,412	)
	Proceeds from issuance of preferred stock		–			487			2,163
	Proceeds from issuance of common stock		453			524			395
	Redemption of preferred stock		–			(500	)		–
	Repurchase of common stock		(2,200	)		(2,282	)		(1,856	)
	Cash dividends paid on preferred stock		(243	)		(254	)		(204	)
	Cash dividends paid on common stock		(1,726	)		(1,576	)		(1,347	)
	Net cash used in financing activities		(1,927	)		(4,947	)		(2,606	)
	Change in cash and due from banks		2,404			4,741			(1,098	)
Cash and due from banks at beginning of year		8,371			3,630			4,728
Cash and due from banks at end of year	$	10,775		$	8,371		$	3,630
Transfer of funds (dividends, loans or advances) from bank subsidiaries to the Company is restricted. Federal law requires loans to the Company or its affiliates to be secured and generally limits loans to the Company or an individual affiliate to 10 percent of each bank’s unimpaired capital and surplus. In the aggregate, loans to the Company and all affiliates cannot exceed 20 percent of each bank’s unimpaired capital and surplus.
Dividend payments to the Company by its subsidiary bank are subject to regulatory review and statutory limitations and, in some instances, regulatory approval. In general, dividends by the Company’s bank subsidiary to the parent company are limited by rules which compare dividends to net income for regulatorily-defined periods. Furthermore, dividends are restricted by minimum capital constraints for all national banks.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	NOTE 25    SUBSEQUENT EVENTS
	The Company has evaluated the impact of events that have occurred subsequent to December 31, 2014 through the date the consolidated financial statements were filed with the United States Securities and Exchange Commission. Based on this evaluation, the Company has determined none of these events were required to be recognized or disclosed in the consolidated financial statements and related notes.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements include the accounts of the Company and its subsidiaries and all variable interest entities (“VIEs”) for which the Company has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or right to receive benefits of the VIE that could potentially be significant to the VIE. Consolidation eliminates all significant intercompany accounts and transactions. Certain items in prior periods have been reclassified to conform to the current presentation.
Uses of Estimates	Uses of Estimates The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual experience could differ from those estimates.
Business Segments	BUSINESS SEGMENTS
	Within the Company, financial performance is measured by major lines of business based on the products and services provided to customers through its distribution channels. The Company has five reportable operating segments:
	Wholesale Banking and Commercial Real Estate Wholesale Banking and Commercial Real Estate offers lending, equipment finance and small-ticket leasing, depository services, treasury management, capital markets, international trade services and other financial services to middle market, large corporate, commercial real estate, financial institution, non-profit and public sector clients.
	Consumer and Small Business Banking Consumer and Small Business Banking delivers products and services through banking offices, telephone servicing and sales, on-line services, direct mail, ATM processing and mobile devices, such as mobile phones and tablet computers. It encompasses community banking, metropolitan banking, in-store banking, small business banking, consumer lending, workplace banking, student banking and 24-hour banking (collectively, the retail banking division), as well as mortgage banking.
	Wealth Management and Securities Services Wealth Management and Securities Services provides private banking, financial advisory services, investment management, retail brokerage services, insurance, trust, custody and fund servicing through five businesses: Wealth Management, Corporate Trust Services, U.S. Bancorp Asset Management, Institutional Trust & Custody and Fund Services.
	Payment Services Payment Services includes consumer and business credit cards, stored-value cards, debit cards, corporate, government and purchasing card services, consumer lines of credit and merchant processing.
	Treasury and Corporate Support Treasury and Corporate Support includes the Company’s investment portfolios, most covered commercial and commercial real estate loans and related other real estate owned (“OREO”), funding, capital management, interest rate risk management, the net effect of transfer pricing related to average balances, income taxes not allocated to business lines, including most investments in tax-advantaged projects, and the residual aggregate of those expenses associated with corporate activities that are managed on a consolidated basis.
	Segment Results Accounting policies for the lines of business are 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 allocate funding costs and benefits, expenses and other financial elements to each line of business. For details of these methodologies and segment results, see “Basis for Financial Presentation” and Table 24 “Line of Business Financial Performance” included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements.
Securities	SECURITIES
	Realized gains or losses on securities are determined on a trade date basis based on the specific amortized cost of the investments sold.
	Trading Securities Debt and equity securities held for resale are classified as trading securities and are included in other assets and reported at fair value. Changes in fair value and realized gains or losses are reported in noninterest income.
	Available-for-sale Securities These securities are not trading securities but may be sold before maturity in response to changes in the Company’s interest rate risk profile, funding needs, demand for collateralized deposits by public entities or other reasons. Available-for-sale securities are carried at fair value with unrealized net gains or losses reported within other comprehensive income (loss) in shareholders’ equity. Declines in fair value for credit-related other-than-temporary impairment, if any, are reported in noninterest income.
	Held-to-maturity Securities Debt securities for which the Company has the positive intent and ability to hold to maturity are reported at historical cost adjusted for amortization of premiums and accretion of discounts. Declines in fair value for credit-related other-than-temporary impairment, if any, are reported in noninterest income.
	Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase Securities purchased under agreements to resell and securities sold under agreements to repurchase are accounted for as collateralized financing transactions with a receivable or payable recorded at the amounts at which the securities were acquired or sold, plus accrued interest. Collateral requirements are continually monitored and additional collateral is received or provided as required. The Company records a receivable or payable for cash collateral paid or received.
Equity Investments in Operating Entities	EQUITY INVESTMENTS IN OPERATING ENTITIES
	Equity investments in public entities in which the Company’s ownership is less than 20 percent are generally accounted for as available-for-sale securities and are carried at fair value. Similar investments in private entities are accounted for using the cost method. Investments in entities where the Company has a significant influence (generally between 20 percent and 50 percent ownership), but does not control the entity, are accounted for using the equity method. Investments in limited partnerships and limited liability companies where the Company’s ownership interest is greater than 5 percent are accounted for using the equity method. All equity investments are evaluated for impairment at least annually and more frequently if certain criteria are met.
Loans	LOANS
	The Company offers a broad array of lending products and categorizes its loan portfolio into three segments, which is the level at which it develops and documents a systematic methodology to determine the allowance for credit losses. The Company’s three loan portfolio segments are commercial lending, consumer lending and covered loans. The Company further disaggregates its loan portfolio segments into various classes based on their underlying risk characteristics. The two classes within the commercial lending segment are commercial loans and commercial real estate loans. The three classes within the consumer lending segment are residential mortgages, credit card loans and other retail loans. The covered loan segment consists of only one class.
	The Company’s accounting methods for loans differ depending on whether the loans are originated or purchased, and for purchased loans, whether the loans were acquired at a discount related to evidence of credit deterioration since date of origination.
	Originated Loans Held for Investment Loans the Company originates as held for investment are reported at the principal amount outstanding, net of unearned income, net deferred loan fees or costs, and any direct principal charge-offs. Interest income is accrued on the unpaid principal balances as earned. Loan and commitment fees and certain direct loan origination costs are deferred and recognized over the life of the loan and/or commitment period as yield adjustments.
	Purchased Loans All purchased loans (non-impaired and impaired) acquired after January 1, 2009 are initially measured at fair value as of the acquisition date in accordance with applicable authoritative accounting guidance. Credit discounts are included in the determination of fair value. An allowance for credit losses is not recorded at the acquisition date for loans purchased after January 1, 2009. In accordance with applicable authoritative accounting guidance, purchased non-impaired loans acquired in a business combination prior to January 1, 2009 were generally recorded at the predecessor’s carrying value including an allowance for credit losses.
	In determining the acquisition date fair value of purchased impaired loans, and in subsequent accounting, the Company generally aggregates purchased consumer loans and certain smaller balance commercial loans into pools of loans with common risk characteristics, while accounting for larger balance commercial loans individually. Expected cash flows at the purchase date in excess of the fair value of loans are recorded as interest income over the life of the loans if the timing and amount of the future cash flows is reasonably estimable. Subsequent to the purchase date, increases in cash flows over those expected at the purchase date are recognized as interest income prospectively. The present value of any decreases in expected cash flows, other than from decreases in variable interest rates, after the purchase date is recognized by recording an allowance for credit losses. Revolving loans, including lines of credit and credit cards loans, and leases are excluded from purchased impaired loans accounting.
	For purchased loans acquired after January 1, 2009 that are not deemed impaired at acquisition, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value. Subsequent to the purchase date, the methods utilized to estimate the required allowance for credit losses for these loans is similar to originated loans; however, the Company records a provision for credit losses only when the required allowance exceeds any remaining credit discounts. The remaining differences between the purchase price and the unpaid principal balance at the date of acquisition are recorded in interest income over the life of the loans.
	Covered Assets Loans covered under loss sharing or similar credit protection agreements with the Federal Deposit Insurance Corporation (“FDIC”) are reported in loans along with the related indemnification asset. Foreclosed real estate covered under similar agreements is recorded in other assets. In accordance with applicable authoritative accounting guidance effective for the Company beginning January 1, 2009, all purchased loans and related indemnification assets are recorded at fair value at the date of purchase.
	Effective January 1, 2013, the Company amortizes any reduction in expected cash flows from the FDIC resulting from increases in expected cash flows from the covered assets (when there are no previous valuation allowances to reverse) over the shorter of the remaining contractual term of the indemnification agreements or the remaining life of the covered assets. Prior to January 1, 2013, the Company considered such increases in expected cash flows of purchased loans and decreases in expected cash flows of the FDIC indemnification assets together and recognized them over the remaining life of the loans.
	Commitments to Extend Credit Unfunded commitments for residential mortgage loans intended to be held for sale are considered derivatives and recorded on the balance sheet at fair value with changes in fair value recorded in income. All other unfunded loan commitments are not considered derivatives and are not reported on the balance sheet. For loans purchased after January 1, 2009, the fair value of the unfunded credit commitments is considered in the determination of the fair value of the loans recorded at the date of acquisition. Reserves for credit exposure on all other unfunded credit commitments are recorded in other liabilities.
	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 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 14-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 a loan’s carrying amount while a loan is on nonaccrual and are recognized as interest income upon payoff of the loan. However, 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, and those loans are classified as nonaccrual loans with interest income 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.
	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, which is generally six months or greater. 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 all of the above 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 and continues to report them as TDRs after the trial period.
	Credit card and other retail loan TDRs 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.
	Impaired 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.
	Leases The Company’s lease portfolio includes both direct financing and leveraged leases. The net investment in direct financing leases is the sum of all minimum lease payments and estimated residual values, less unearned income. Unearned income is recorded in interest income over the terms of the leases to produce a level yield.
	The investment in leveraged leases is the sum of all lease payments, less nonrecourse debt payments, plus estimated residual values, less unearned income. Income from leveraged leases is recognized over the term of the leases based on the unrecovered equity investment.
	Residual values on leased assets are reviewed regularly for other-than-temporary impairment. Residual valuations for retail automobile leases are based on independent assessments of expected used car sale prices at the end-of-term. Impairment tests are conducted based on these valuations considering the probability of the lessee returning the asset to the Company, re-marketing efforts, insurance coverage and ancillary fees and costs. Valuations for commercial leases are based upon external or internal management appraisals. When there is impairment of the Company’s interest in the residual value of a leased asset, the carrying value is reduced to the estimated fair value with the writedown recognized in the current period.
	Other Real Estate OREO is included in other assets, and is property acquired through foreclosure or other proceedings on defaulted loans. OREO is initially recorded at fair value, less estimated selling costs. OREO is evaluated regularly and any decreases in value along with holding costs, such as taxes and insurance, are reported in noninterest expense.
Indemnification Assets Related to FDIC Loss-Sharing Agreements	Effective January 1, 2013, the Company amortizes any reduction in expected cash flows from the FDIC resulting from increases in expected cash flows from the covered assets (when there are no previous valuation allowances to reverse) over the shorter of the remaining contractual term of the indemnification agreements or the remaining life of the covered assets. Prior to January 1, 2013, the Company considered such increases in expected cash flows of purchased loans and decreases in expected cash flows of the FDIC indemnification assets together and recognized them over the remaining life of the loans.
Loans Held for Sale	LOANS HELD FOR SALE
	Loans held for sale (“LHFS”) represent mortgage loans intended to be sold in the secondary market and other loans that management has an active plan to sell. LHFS are carried at the lower-of-cost-or-fair value as determined on an aggregate basis by type of loan with the exception of loans for which the Company has elected fair value accounting, which are carried at fair value. The credit component of any writedowns upon the transfer of loans to LHFS is reflected in loan charge-offs.
	Where an election is made to carry the LHFS at fair value, any change in fair value is recognized in noninterest income. Where an election is made to carry LHFS at lower-of-cost-or-fair value, any further decreases are recognized in noninterest income and increases in fair value are not recognized until the loans are sold. Fair value elections are made at the time of origination or purchase based on the Company’s fair value election policy. The Company has elected fair value accounting for substantially all its mortgage loans held for sale.
Derivative Financial Instruments	DERIVATIVE FINANCIAL 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. Derivative instruments are reported in other assets or other liabilities at fair value. Changes in a derivative’s fair value are recognized currently in earnings unless specific hedge accounting criteria are met.
	All derivative instruments that qualify and are designated for hedge accounting are recorded at fair value and classified 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”); or a hedge of the volatility of an investment in foreign operations driven by changes in foreign currency exchange rates (“net investment hedge”). Changes in the fair value of a derivative that is highly effective and designated as a fair value hedge, and the offsetting changes in the fair value of the hedged item, are recorded in earnings. Changes in the fair value of a derivative that is highly effective and designated as a cash flow hedge are recorded in other comprehensive income (loss) until cash flows of the hedged item are realized. Any change in fair value resulting from hedge ineffectiveness is immediately recorded in noninterest income. Changes in the fair value of net investment hedges that are highly effective are recorded in other comprehensive income (loss). 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).
	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).
Revenue Recognition	REVENUE RECOGNITION
	The Company recognizes revenue as it is earned based on contractual terms, as transactions occur, or as services are provided and collectability is reasonably assured. In certain circumstances, noninterest income is reported net of associated expenses that are directly related to variable volume-based sales or revenue sharing arrangements or when the Company acts on an agency basis for others. Certain specific policies include the following:
	Credit and Debit Card Revenue Credit and debit card revenue includes interchange from consumer credit and debit cards processed through card association networks, annual fees, and other transaction and account management fees. Interchange rates are generally set by the credit card associations and based on purchase volumes and other factors. The Company records interchange as transactions occur. Transaction and account management fees are recognized as transactions occur or services are provided, except for annual fees which are recognized over the applicable period. Volume-related payments to partners and credit card associations and costs for rewards programs are also recorded within credit and debit card revenue when earned by the partner or customer.
	Corporate Payment Products Revenue Corporate payment products revenue primarily includes interchange from corporate and purchasing cards processed through card association networks and revenue from proprietary network transactions. The Company records corporate payment products revenue as transactions occur. Volume-related payments to customers and credit card associations are also recorded within corporate payment products revenue when earned by the customer or card association.
	Merchant Processing Services Merchant processing services revenue consists principally of merchant discount and other transaction and account management fees charged to merchants for the electronic processing of card association network transactions, net of interchange paid to the card-issuing bank, card association assessments, and revenue sharing amounts. All of these are recognized at the time the merchant’s transactions are processed or other services are performed. The Company may enter into revenue sharing agreements with referral partners or in connection with purchases of merchant contracts from sellers. The revenue sharing amounts are determined primarily on sales volume processed or revenue generated for a particular group of merchants. Merchant processing revenue also includes revenues related to point-of-sale equipment recorded as sales when the equipment is shipped or as earned for equipment rentals.
	Trust and Investment Management Fees Trust and investment management fees are recognized over the period in which services are performed and are based on a percentage of the fair value of the assets under management or administration, fixed based on account type, or transaction-based fees.
	Deposit Service Charges Service charges on deposit accounts are primarily monthly fees based on minimum balances or transaction-based fees. These fees are recognized as earned or as transactions occur and services are provided.
	Commercial Products Revenue Commercial products revenue primarily includes revenue related to ancillary services provided to Wholesale Banking and Commercial Real Estate customers including standby letter of credit fees, non-yield related loan fees, capital markets related revenue and non-yield related leasing revenue. These fees are recognized as earned or as transactions occur and services are provided.
	Mortgage Banking Revenue Mortgage banking revenue includes revenue derived from mortgages originated and subsequently sold, generally with servicing retained. The primary components include: gains and losses on mortgage sales; servicing revenue; changes in fair value for mortgage loans originated with the intent to sell and measured at fair value under the fair value option; changes in fair value for derivative commitments to purchase and originate mortgage loans; changes in the fair value of mortgage servicing rights (“MSRs”); and the impact of risk management activities associated with the mortgage origination pipeline, funded loans and MSRs. Net interest income from mortgage loans is recorded in interest income. Refer to Other Significant Policies in Note 1, as well as Note 10 and Note 22 for a further discussion of MSRs.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill is recorded on acquired businesses if the purchase price exceeds the fair value of the net assets acquired. Other intangible assets are recorded at their fair value upon completion of a business acquisition or certain other transactions, and generally represent the value of customer contracts or relationships. Goodwill is not amortized but is subject, at a minimum, to annual tests for impairment at a reporting unit level. In certain situations, an interim impairment test may be required if events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. Other intangible assets are amortized over their estimated useful lives, using straight-line and accelerated methods and are subject to impairment if events or circumstances indicate a possible inability to realize the carrying amount. Determining the amount of goodwill impairment, if any, includes assessing the current implied fair value of the reporting unit as if it were being acquired in a business combination and comparing it to the carrying amount of the reporting unit’s goodwill. Determining the amount of other intangible asset impairment, if any, includes assessing the present value of the estimated future cash flows associated with the intangible asset and comparing it to the carrying amount of the asset.
Income Taxes	Income Taxes Deferred taxes are recorded to reflect the tax consequences on future years of differences between the tax basis of assets and liabilities and their financial reporting carrying amounts. The Company uses the deferral method of accounting on investments that generate investment tax credits. Under this method, the investment tax credits are recognized as a reduction to the related 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.
Accounting for Investments in Qualified Affordable Housing Projects	In January 2014, the Financial Accounting Standards Board issued accounting guidance for qualified affordable housing projects. This new guidance permits the Company to present the expense on certain qualified affordable housing investments in tax expense rather than noninterest expense. The Company adopted this guidance January 1, 2014, on a prospective basis, because the impact on prior financial statements was not material.
Mortgage Servicing Rights	Mortgage Servicing Rights MSRs are capitalized as separate assets when loans are sold and servicing is retained or if they are purchased from others. MSRs are recorded at fair value. The Company determines the fair value by estimating the present value of the asset’s future cash flows utilizing market-based prepayment rates, discount rates, and other assumptions validated through comparison to trade information, industry surveys and independent third party valuations. Changes in the fair value of MSRs are recorded in earnings as mortgage banking revenue during the period in which they occur.
Pensions	Pensions For purposes of its pension plans, the Company utilizes its fiscal year-end as the measurement date. At the measurement date, plan assets are determined based on fair value, generally representing observable market prices or the net asset value provided by the plans’ administrator. The actuarial cost method used to compute the pension liabilities and related expense is the projected unit credit method. The
	projected benefit obligation is principally determined based on the present value of projected benefit distributions at an assumed discount rate. The discount rate utilized is based on the investment yield of high quality corporate bonds available in the marketplace with maturities equal to projected cash flows of future benefit payments as of the measurement date. Periodic pension expense (or income) includes service costs, interest costs based on the assumed discount rate, the expected return on plan assets based on an actuarially derived market-related value and amortization of actuarial gains and losses. Pension accounting reflects the long-term nature of benefit obligations and the investment horizon of plan assets, and can have the effect of reducing earnings volatility related to short-term changes in interest rates and market valuations. Actuarial gains and losses include the impact of plan amendments and various unrecognized gains and losses which are deferred and amortized over the future service periods of active employees. The market-related value utilized to determine the expected return on plan assets is based on fair value adjusted for the difference between expected returns and actual performance of plan assets. The unrealized difference between actual experience and expected returns is included in expense over a period of approximately twelve years. The overfunded or underfunded status of the plans is recorded as an asset or liability on the Consolidated Balance Sheet, with changes in that status recognized through other comprehensive income (loss).
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation and depreciated primarily on a straight-line basis over the estimated life of the assets. Estimated useful lives range up to 40 years for newly constructed buildings and from 3 to 20 years for furniture and equipment.
	Capitalized leases, less accumulated amortization, are included in premises and equipment. Capitalized lease obligations are included in long-term debt. Capitalized leases are amortized on a straight-line basis over the lease term and the amortization is included in depreciation expense.
Stock-Based Compensation	Stock-Based Compensation The Company grants stock-based awards, including restricted stock, restricted stock units and options to purchase common stock of the Company. Stock option grants are for a fixed number of shares to employees and directors with an exercise price equal to the fair value of the shares at the date of grant. Restricted stock and restricted stock unit grants are awarded at no cost to the recipient. Stock-based compensation for awards is recognized in the Company’s results of operations on a straight-line basis over the vesting period. The Company immediately recognizes compensation cost of awards to employees that meet retirement status, despite their continued active employment. The amortization of stock-based compensation reflects estimated forfeitures adjusted for actual forfeiture experience. As compensation expense is recognized, a deferred tax asset is recorded that represents an estimate of the future tax deduction from exercise or release of restrictions. At the time stock-based awards are exercised, cancelled, expire, or restrictions are released, the Company may be required to recognize an adjustment to tax expense, depending on the market price of the Company’s common stock at that time.
Per Share Calculations	Per Share Calculations Earnings per common share is calculated by dividing net income applicable to U.S. Bancorp common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share is calculated by adjusting income and outstanding shares, assuming conversion of all potentially dilutive securities.
Revenue Recognition	Revenue Recognition In May 2014, the Financial Accounting Standards Board (“FASB”) 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.
	Consolidation In February 2015, the FASB issued accounting guidance, effective for the Company on January 1, 2016, with early adoption permitted, related to the analysis required by organizations to evaluate whether they should consolidate certain legal entities. The Company does not expect the adoption of this guidance to have a material impact on its financial statements.
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. Guarantees provided to certain third parties in connection with the transfer of assets are further discussed in Note 23.
	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 MSRs, refer to Note 10. 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, 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 Company is required to consolidate VIEs in which it has concluded it has a controlling financial interest. The Company sponsors entities to which it transfers its interests in 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 securities, as well as exchange-traded instruments, including certain perpetual preferred and corporate debt securities.
	–	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 years ended December 31, 2014, 2013 and 2012, 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.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Line of Business Financial Performance	TABLE 24    LINE OF BUSINESS FINANCIAL PERFORMANCE
			Wholesale Banking and								Consumer and Small
			Commercial Real Estate								Business Banking
	Year Ended December 31		2014		2013			Percent			2014			2013			Percent
	(Dollars in Millions)							Change									Change
	Condensed Income Statement
	Net interest income (taxable-equivalent basis)		$	2,061	$	2,011			2.5	%	$	4,313		$	4,598			(6.2	)%
	Noninterest income			976		1,092			(10.6	)		2,602			2,892			(10.0	)
	Securities gains (losses), net			–		–			–			–			–			–
	Total net revenue			3,037		3,103			(2.1	)		6,915			7,490			(7.7	)
	Noninterest expense			1,238		1,218			1.6			4,571			4,482			2
	Other intangibles			4		8			(50.0	)		41			41			–
	Total noninterest expense			1,242		1,226			1.3			4,612			4,523			2
	Income before provision and income taxes			1,795		1,877			(4.4	)		2,303			2,967			(22.4	)
	Provision for credit losses			43		(89	)		*			393			600			(34.5	)
	Income before income taxes			1,752		1,966			(10.9	)		1,910			2,367			(19.3	)
	Income taxes and taxable-equivalent adjustment			637		716			(11.0	)		695			862			(19.4	)
	Net income			1,115		1,250			(10.8	)		1,215			1,505			(19.3	)
	Net (income) loss attributable to noncontrolling interests			–		–			–			–			–			–
	Net income attributable to U.S. Bancorp		$	1,115	$	1,250			(10.8	)	$	1,215		$	1,505			(19.3	)
	Average Balance Sheet
	Commercial		$	57,989	$	50,774			14.2	%	$	9,074		$	8,495			6.8	%
	Commercial real estate			20,954		19,566			7.1			18,836			17,923			5.1
	Residential mortgages			20		26			(23.1	)		50,414			47,080			7.1
	Credit card			–		–			–			–			–			–
	Other retail			4		7			(42.9	)		46,221			44,848			3.1
	Total loans, excluding covered loans			78,967		70,373			12.2			124,545			118,346			5.2
	Covered loans			190		363			(47.7	)		5,779			6,566			(12.0	)
	Total loans			79,157		70,736			11.9			130,324			124,912			4.3
	Goodwill			1,628		1,604			1.5			3,602			3,514			2.5
	Other intangible assets			21		25			(16.0	)		2,675			2,406			11.2
	Assets			86,361		77,180			11.9			144,164			140,248			2.8
	Noninterest-bearing deposits			32,642		31,037			5.2			23,771			22,104			7.5
	Interest checking			10,599		10,507			0.9			36,227			33,046			9.6
	Savings products			18,667		14,105			32.3			50,034			46,357			7.9
	Time deposits			18,147		18,482			(1.8	)		17,953			21,138			(15.1	)
	Total deposits			80,055		74,131			8			127,985			122,645			4.4
	Total U.S. Bancorp shareholders’ equity			7,743		7,287			6.3			11,483			12,218			(6.0	)
	*	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
			$	370	$	342			8.2	%	$	1,740		$	1,584			9.8	%	$	2,513		$	2,293		9.6	%	$	10,997		$	10,828		1.6	%
				1,395		1,267			10.1			3,292			3,205			2.7			896			309		*			9,161			8,765		4.5
				–		–			–			–			–			–			3			9		(66.7	)		3			9		(66.7	)
				1,765		1,609			9.7			5,032			4,789			5.1			3,412			2,611		30.7			20,161			19,602		2.9
				1,349		1,306			3.3			2,356			2,282			3.2			1,002			763		31.3			10,516			10,051		4.6
				33		37			(10.8	)		121			137			(11.7	)		–			–		–			199			223		(10.8	)
				1,382		1,343			2.9			2,477			2,419			2.4			1,002			763		31.3			10,715			10,274		4.3
				383		266			44			2,555			2,370			7.8			2,410			1,848		30.4			9,446			9,328		1.3
				9		6			50			766			769			(.4	)		18			54		(66.7	)		1,229			1,340		(8.3	)
				374		260			43.8			1,789			1,601			11.7			2,392			1,794		33.3			8,217			7,988		2.9
				137		94			45.7			651			582			11.9			189			2		*			2,309			2,256		2.3
				237		166			42.8			1,138			1,019			11.7			2,203			1,792		22.9			5,908			5,732		3.1
				–		–			–			(35	)		(39	)		10.3			(22	)		143		*			(57	)		104		*
			$	237	$	166			42.8		$	1,103		$	980			12.6		$	2,181		$	1,935		12.7		$	5,851		$	5,836		0.3
			$	1,960	$	1,711			14.6	%	$	6,542		$	6,086			7.5	%	$	169		$	208		(18.8	)%	$	75,734		$	67,274		12.6	%
				607		652			(6.9	)		–			–			–			195			96		*			40,592			38,237		6.2
				1,383		875			58.1			–			–			–			1			1		–			51,818			47,982		8
				–		–			–			17,635			16,813			4.9			–			–		–			17,635			16,813		4.9
				1,456		1,533			(5.0	)		672			737			(8.8	)		–			–		–			48,353			47,125		2.6
				5,406		4,771			13.3			24,849			23,636			5.1			365			305		19.7			234,132			217,431		7.7
				4		14			(71.4	)		5			5			–			1,582			3,095		(48.9	)		7,560			10,043		(24.7	)
			5,410		4,785			13.1			24,854			23,641			5.1			1,947			3,400		(42.7	)		241,692			227,474		6.3
			1,568		1,535			2.1			2,514			2,511			0.1			–			–		–			9,312			9,164		1.6
			159		173			(8.1	)		483			572			(15.6	)		–			2		*			3,338			3,178		5
			8,489		7,644			11.1			31,098			29,844			4.2			109,892			97,764		12.4			380,004			352,680		7.7
			15,120		14,595			3.6			739			703			5.1			1,183			581		*			73,455			69,020		6.4
			5,866		4,789			22.5			555			449			23.6			1			1		–			53,248			48,792		9.1
			29,288		26,819			9.2			78			57			36.8			106			90		17.8			98,173			87,428		12.3
			3,899		4,903			(20.5	)		–			–			–			1,765			694		*			41,764			45,217		(7.6	)
			54,173		51,106			6			1,372			1,209			13.5			3,055			1,366		*			266,640			250,457		6.5
			2,283		2,385			(4.3	)		5,697			6,046			(5.8	)		15,631			11,981		30.5			42,837			39,917		7.3

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities	TABLE 13    INVESTMENT SECURITIES
			Available-for-Sale																Held-to-Maturity
	At December 31, 2014 (Dollars in Millions)		Amortized			Fair			Weighted-				Weighted-						Amortized				Fair				Weighted-				Weighted-
			Cost			Value			Average				Average						Cost				Value				Average				Average
									Maturity				Yield(e)														Maturity				Yield(e)
									in Years																		in Years
	U.S. Treasury and Agencies
	Maturing in one year or less		$	121		$	122			0.1				3.27	%				$	80			$	81				0.4				1.36	%
	Maturing after one year through five years			1,886			1,890			3.3				1.73						1,097				1,101				3.7				1.42
	Maturing after five years through ten years			514			519			7.5				2.9						1,483				1,475				7.6				2.21
	Maturing after ten years			101			101			18.3				1.39						57				57				10.6				1.74
	Total		$	2,622		$	2,632			4.6				2.02	%				$	2,717			$	2,714				5.9				1.86	%
	Mortgage-Backed Securities(a)
	Maturing in one year or less		$	970		$	973			0.7				1.39	%				$	320			$	320				0.7				1.29	%
	Maturing after one year through five years			36,671			36,984			3.9				1.87						37,598				37,737				3.7				2
	Maturing after five years through ten years			7,104			7,162			5.9				1.73						4,079				4,100				5.8				1.31
	Maturing after ten years			695			698			11.9				1.24						208				207				11.5				1.13
	Total		$	45,440		$	45,817			4.2				1.83	%				$	42,205			$	42,364				3.9				1.93	%
	Asset-Backed Securities(a)
	Maturing in one year or less		$	–		$	–			–				–	%				$	–			$	1				0.5				0.79	%
	Maturing after one year through five years			269			278			3.3				1.82						7				10				2.4				0.88
	Maturing after five years through ten years			356			363			6.8				1.94						6				6				6.4				0.83
	Maturing after ten years			–			–			–				–						–				7				15.3				0.9
	Total		$	625		$	641			5.3				1.89	%				$	13			$	24				4.3				0.85	%
	Obligations of State and Political Subdivisions(b)(c)
	Maturing in one year or less		$	904		$	920			0.5				6.62	%				$	1			$	1				0.5				10.19	%
	Maturing after one year through five years			4,087			4,317			2.1				6.72						1				1				2.9				8.35
	Maturing after five years through ten years			519			528			7				4.54						1				1				7.2				8.05
	Maturing after ten years			94			103			14.4				7.37						6				6				11.2				2.51
	Total		$	5,604		$	5,868			2.5				6.51	%				$	9			$	9				9				4.37	%
	Other Debt Securities
	Maturing in one year or less		$	6		$	6			0.2				1.01	%				$	–			$	–				–				–	%
	Maturing after one year through five years			–			–			–				–						9				9				2.2				1.44
	Maturing after five years through ten years			–			–			–				–						21				20				5.8				0.97
	Maturing after ten years			690			614			18.5				2.47						–				–				–				–
	Total		$	696		$	620			18.3				2.45	%				$	30			$	29				4.8				1.11	%
	Other Investments		$	445		$	491			13.6				2.21	%				$	–			$	–				–				–	%
	Total investment securities(d)		$	55,432		$	56,069			4.3				2.32	%				$	44,974			$	45,140				4				1.92	%
	(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.
			2014								2013
	At December 31 (Dollars in Millions)		Amortized			Percent					Amortized				Percent
			Cost			of Total					Cost				of Total
	U.S. Treasury and agencies		$	5,339			5.3	%			$	4,222				5.3	%
	Mortgage-backed securities			87,645			87.3					68,236				85.3
	Asset-backed securities			638			0.6					652				0.8
	Obligations of state and political subdivisions			5,613			5.6					5,685				7.1
	Other debt securities and investments			1,171			1.2					1,184				1.5
	Total investment securities		$	100,406			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 and available-for-sale investment securities at December 31 were as follows:
			2014																				2013
									Unrealized Losses																						Unrealized Losses
	(Dollars in Millions)		Amortized			Unrealized			Other-than-				Other (f)				Fair Value						Amortized				Unrealized				Other-than-				Other (f)				Fair Value
			Cost			Gains			Temporary (e)														Cost				Gains				Temporary (e)
	Held-to-maturity (a)
	U.S. Treasury and agencies		$	2,717		$	15		$	–			$	(18	)		$	2,714					$	3,114			$	5			$	–			$	(79	)		$	3,040
	Mortgage-backed securities
	Residential
	Agency			42,204			335			–				(176	)			42,363						35,671				187				–				(665	)			35,193
	Non-agency non-prime (d)			1			–			–				–				1						1				–				–				–				1
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			7			–				–				7						–				9				–				–				9
	Other			13			4			–				–				17						16				4				(1	)			(1	)			18
	Obligations of state and political subdivisions			9			1			–				(1	)			9						12				–				–				–				12
	Obligations of foreign governments			9			–			–				–				9						7				–				–				–				7
	Other debt securities			21			–			–				(1	)			20						99				–				–				(11	)			88
	Total held-to-maturity		$	44,974		$	362		$	–			$	(196	)		$	45,140					$	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 held-to-maturity and available-for-sale investment securities at December 31 were as follows:
			2014																				2013
									Unrealized Losses																						Unrealized Losses
	(Dollars in Millions)		Amortized			Unrealized			Other-than-				Other (f)				Fair Value						Amortized				Unrealized				Other-than-				Other (f)				Fair Value
			Cost			Gains			Temporary (e)														Cost				Gains				Temporary (e)
	Available-for-sale (b)
	U.S. Treasury and agencies		$	2,622		$	14		$	–			$	(4	)		$	2,632					$	1,108			$	4			$	–			$	(67	)		$	1,045
	Mortgage-backed securities
	Residential
	Agency			44,668			593			–				(244	)			45,017						31,633				449				–				(529	)			31,553
	Non-agency
	Prime (c)			399			9			(2	)			(1	)			405						486				4				(8	)			(4	)			478
	Non-prime (d)			261			20			(1	)			–				280						297				5				(5	)			–				297
	Commercial agency			112			3			–				–				115						148				4				–				–				152
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			18			4			–				–				22						20				4				–				–				24
	Other			607			13			–				(1	)			619						616				13				–				–				629
	Obligations of state and political subdivisions			5,604			265			–				(1	)			5,868						5,673				116				–				(51	)			5,738
	Obligations of foreign governments			6			–			–				–				6						6				–				–				–				6
	Corporate debt securities			690			3			–				(79	)			614						734				–				–				(94	)			640
	Perpetual preferred securities			200			27			–				(10	)			217						205				24				–				(17	)			212
	Other investments			245			29			–				–				274						133				28				–				–				161
	Total available-for-sale		$	55,432		$	980		$	(3	)		$	(340	)		$	56,069					$	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:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Taxable		$	1,634		$	1,375		$	1,515
	Non-taxable			232			256			277
	Total interest income from investment securities		$	1,866		$	1,631		$	1,792
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:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Realized gains		$	11		$	23		$	158
	Realized losses			–			–			(99	)
	Net realized gains (losses)		$	11		$	23		$	59
	Income tax (benefit) on net realized gains (losses)		$	4		$	9		$	23
Summary of Other-than-Temporary Impairment by Investment Category	The following table summarizes other-than-temporary impairment by investment category:
			2014												2013														2012
	Year Ended December 31 (Dollars in Millions)		Losses			Other Gains			Total						Losses				Other Gains				Total						Losses				Other Gains				Total
			Recorded in			(Losses)(c)									Recorded in				(Losses)(c)										Recorded in				(Losses)(c)
			Earnings												Earnings														Earnings
	Available-for-sale
	Mortgage-backed securities
	Non-agency residential
	Prime(a)		$	(1	)	$	1		$	–					$	(6	)		$	2			$	(4	)				$	(12	)		$	(9	)		$	(21	)
	Non-prime(b)			(2	)		–			(2	)					(8	)			6				(2	)					(33	)			21				(12	)
	Commercial non-agency			–			–			–						–				–				–						(1	)			(1	)			(2	)
	Other asset-backed securities			–			–			–						–				–				–						(1	)			1				–
	Perpetual preferred securities			(5	)		–			(5	)					–				–				–						(27	)			–				(27	)
	Total available-for-sale		$	(8	)	$	1		$	(7	)				$	(14	)		$	8			$	(6	)				$	(74	)		$	12			$	(62	)
	(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 2014:
			Prime(a)												Non-Prime(b)
			Minimum			Maximum			Average						Minimum				Maximum				Average
	Estimated lifetime prepayment rates			7	%		20	%		16	%					1	%			10	%			5	%
	Lifetime probability of default rates			3			7			4						6				14				9
	Lifetime loss severity rates			15			60			47						40				75				56
	(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.
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:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Balance at beginning of period		$	116		$	134		$	298
	Additions to Credit Losses Due to Other-than-temporary Impairments
	Credit losses on securities not previously considered other-than-temporarily impaired			–			–			6
	Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized			3			14			41
	Total other-than-temporary impairment on debt securities			3			14			47
	Other Changes in Credit Losses
	Increases in expected cash flows			(5	)		(2	)		(15	)
	Realized losses(a)			(13	)		(23	)		(39	)
	Credit losses on security sales and securities expected to be sold			–			(7	)		(157	)
	Balance at end of period		$	101		$	116		$	134
	(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 December 31, 2014, certain investment securities had a fair value below amortized cost. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at December 31, 2014:
			Less Than 12 Months								12 Months or Greater										Total
	(Dollars in Millions)		Fair Value			Unrealized					Fair Value				Unrealized						Fair				Unrealized
						Losses									Losses						Value				Losses
	Held-to-maturity
	U.S. Treasury and agencies		$	184		$	(1	)			$	986			$	(17	)				$	1,170			$	(18	)
	Residential agency mortgage-backed securities			5,276			(19	)				7,283				(157	)					12,559				(176	)
	Other asset-backed securities			–			–					6				–						6				–
	Obligations of state and political subdivisions			2			(1	)				–				–						2				(1	)
	Other debt securities			–			–					20				(1	)					20				(1	)
	Total held-to-maturity		$	5,462		$	(21	)			$	8,295			$	(175	)				$	13,757			$	(196	)
	Available-for-sale
	U.S. Treasury and agencies		$	100		$	–				$	741			$	(4	)				$	841			$	(4	)
	Mortgage-backed securities
	Residential
	Agency			4,913			(31	)				8,203				(213	)					13,116				(244	)
	Non-agency(a)
	Prime(b)			106			(1	)				70				(2	)					176				(3	)
	Non-prime(c)			17			–					21				(1	)					38				(1	)
	Other asset-backed securities			4			–					23				(1	)					27				(1	)
	Obligations of state and political subdivisions			53			(1	)				104				–						157				(1	)
	Obligations of foreign governments			6			–					–				–						6				–
	Corporate debt securities			–			–					429				(79	)					429				(79	)
	Perpetual preferred securities			–			–					74				(10	)					74				(10	)
	Total available-for-sale		$	5,199		$	(33	)			$	9,665			$	(310	)				$	14,864			$	(343	)
	(a)	The Company has $4 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)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Composition of Loan Portfolio	The composition of the loan portfolio at December 31, disaggregated by class and underlying specific portfolio type, was as follows:
	(Dollars in Millions)		2014			2013
	Commercial
	Commercial		$	74,996		$	64,762
	Lease financing			5,381			5,271
	Total commercial			80,377			70,033
	Commercial Real Estate
	Commercial mortgages			33,360			32,183
	Construction and development			9,435			7,702
	Total commercial real estate			42,795			39,885
	Residential Mortgages
	Residential mortgages			38,598			37,545
	Home equity loans, first liens			13,021			13,611
	Total residential mortgages			51,619			51,156
	Credit Card			18,515			18,021
	Other Retail
	Retail leasing			5,871			5,929
	Home equity and second mortgages			15,916			15,442
	Revolving credit			3,309			3,276
	Installment			6,242			5,709
	Automobile			14,822			13,743
	Student			3,104			3,579
	Total other retail			49,264			47,678
	Total loans, excluding covered loans			242,570			226,773
	Covered Loans			5,281			8,462
	Total loans		$	247,851		$	235,235
Changes in Accretable Balance for Purchased Impaired Loans	Changes in the accretable balance for purchased impaired loans for the years ended December 31, were as follows:
	(Dollars in Millions)		2014			2013			2012
	Balance at beginning of period		$	1,655		$	1,709		$	2,619
	Purchases			–			–			13
	Accretion			(441	)		(499	)		(437	)
	Disposals			(131	)		(172	)		(208	)
	Reclassifications from nonaccretable difference(a)			229			258			454
	Other(b)			(3	)		359			(732	)
	Balance at end of period		$	1,309		$	1,655		$	1,709
	(a)	Primarily relates to changes in expected credit performance.
	(b)	The amount for the year ended December 31, 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 107 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. The amount for the year end December 31, 2012, primarily represents a change in the Company’s expectations regarding potential sale of modified covered loans at the end of the indemnification agreements which results in a reduction in the expected contractual interest payments included in the accretable balance for those loans that may be sold.
Activity in Allowance for Credit Losses by Portfolio Type	Activity in the allowance for credit losses by portfolio class was as follows:
	(Dollars in Millions)		Commercial			Commercial			Residential				Credit				Other			Total Loans,			Covered			Total
						Real Estate			Mortgages				Card				Retail			Excluding			Loans			Loans
																				Covered Loans
	Balance at December 31, 2013		$	1,075		$	776		$	875			$	884			$	781		$	4,391		$	146		$	4,537
	Add
	Provision for credit losses			266			(63	)		107				657				278			1,245			(16	)		1,229
	Deduct
	Loans charged off			305			36			216				725				384			1,666			13			1,679
	Less recoveries of loans charged off			(110	)		(49	)		(21	)			(67	)			(96	)		(343	)		(2	)		(345	)
	Net loans charged off			195			(13	)		195				658				288			1,323			11			1,334
	Other changes (a)			–			–			–				(3	)			–			(3	)		(54	)		(57	)
	Balance at December 31, 2014		$	1,146		$	726		$	787			$	880			$	771		$	4,310		$	65		$	4,375
	Balance at December 31, 2012		$	1,051		$	857		$	935			$	863			$	848		$	4,554		$	179		$	4,733
	Add
	Provision for credit losses			144			(114	)		212				677				351			1,270			70			1,340
	Deduct
	Loans charged off			246			92			297				739				523			1,897			37			1,934
	Less recoveries of loans charged off			(126	)		(125	)		(25	)			(83	)			(105	)		(464	)		(5	)		(469	)
	Net loans charged off			120			(33	)		272				656				418			1,433			32			1,465
	Other changes (a)			–			–			–				–				–			–			(71	)		(71	)
	Balance at December 31, 2013		$	1,075		$	776		$	875			$	884			$	781		$	4,391		$	146		$	4,537
	Balance at December 31, 2011		$	1,010		$	1,154		$	927			$	992			$	831		$	4,914		$	100		$	5,014
	Add
	Provision for credit losses			316			(131	)		446				571				558			1,760			122			1,882
	Deduct
	Loans charged off			378			242			461				769				666			2,516			11			2,527
	Less recoveries of loans charged off			(103	)		(76	)		(23	)			(102	)			(125	)		(429	)		(1	)		(430	)
	Net loans charged off			275			166			438				667				541			2,087			10			2,097
	Other changes (a)			–			–			–				(33	)			–			(33	)		(33	)		(66	)
	Balance at December 31, 2012		$	1,051		$	857		$	935			$	863			$	848		$	4,554		$	179		$	4,733
	(a)	Includes net changes in credit losses to be reimbursed by the FDIC and for the years ended December 31, 2014 and 2013, 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 December 31, 2014 Related to
	Loans individually evaluated for impairment(a)		$	5		$	4		$	–			$	–			$	–		$	9		$	–		$	9
	TDRs collectively evaluated for impairment			12			12			319				61				41			445			4			449
	Other loans collectively evaluated for impairment			1,129			678			468				819				730			3,824			1			3,825
	Loans acquired with deteriorated credit quality			–			32			–				–				–			32			60			92
	Total allowance for credit losses		$	1,146		$	726		$	787			$	880			$	771		$	4,310		$	65		$	4,375
	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
	December 31, 2014
	Loans individually evaluated for impairment(a)		$	159		$	128		$	12			$	–			$	–		$	299		$	–		$	299
	TDRs collectively evaluated for impairment			124			393			4,653				240				237			5,647			34			5,681
	Other loans collectively evaluated for impairment			80,093			41,744			46,953				18,275				49,027			236,092			2,463			238,555
	Loans acquired with deteriorated credit quality			1			530			1				–				–			532			2,784			3,316
	Total loans		$	80,377		$	42,795		$	51,619			$	18,515			$	49,264		$	242,570		$	5,281		$	247,851
	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
	December 31, 2014
	Commercial		$	79,977		$	247		$	41			$	112			$	80,377
	Commercial real estate			42,406			110			20				259				42,795
	Residential mortgages(a)			50,330			221			204				864				51,619
	Credit card			18,046			229			210				30				18,515
	Other retail			48,764			238			75				187				49,264
	Total loans, excluding covered loans			239,523			1,045			550				1,452				242,570
	Covered loans			4,804			68			395				14				5,281
	Total loans		$	244,327		$	1,113		$	945			$	1,466			$	247,851
	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 December 31, 2014, $431 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
	December 31, 2014
	Commercial		$	78,409		$	1,204		$	764			$	1,968			$	80,377
	Commercial real estate			41,322			451			1,022				1,473				42,795
	Residential mortgages(b)			50,479			5			1,135				1,140				51,619
	Credit card			18,275			–			240				240				18,515
	Other retail			48,932			20			312				332				49,264
	Total loans, excluding covered loans			237,417			1,680			3,473				5,153				242,570
	Covered loans			5,164			–			117				117				5,281
	Total loans		$	242,581		$	1,680		$	3,590			$	5,270			$	247,851
	Total outstanding commitments		$	501,535		$	2,964		$	4,179			$	7,143			$	508,678
	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 December 31, 2014, $3.1 billion of GNMA loans 90 days or more past due and $2.2 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, which include all nonaccrual and TDR 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
	December 31, 2014
	Commercial		$	329		$	769		$	21			$	51
	Commercial real estate			624			1,250			23				18
	Residential mortgages			2,730			3,495			273				–
	Credit card			240			240			61				–
	Other retail			361			570			44				4
	Total impaired loans, excluding GNMA and covered loans			4,284			6,324			422				73
	Loans purchased from GNMA mortgage pools			2,244			2,244			50				–
	Covered loans			43			55			4				1
	Total		$	6,571		$	8,623		$	476			$	74
	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 December 31, 2014 and 2013, had an associated allowance for credit losses. The total amount of interest income recognized during 2014 on loans classified as impaired at December 31, 2014, excluding those acquired with deteriorated credit quality, was $341 million, compared to what would have been recognized at the original contractual terms of the loans of $470 million.
Impaired Loans Average Recorded Investment and Interest Income	Additional information on impaired loans for the years ended December 31 follows:
	(Dollars in Millions)		Average			Interest
			Recorded			Income
			Investment			Recognized
	2014
	Commercial		$	414		$	9
	Commercial real estate			592			26
	Residential mortgages			2,742			140
	Credit card			273			9
	Other retail			377			17
	Total impaired loans, excluding GNMA and covered loans			4,398			201
	Loans purchased from GNMA mortgage pools			2,609			124
	Covered loans			334			15
	Total		$	7,341		$	340
	2013
	Commercial		$	382		$	29
	Commercial real estate			889			39
	Residential mortgages			2,749			134
	Credit card			366			16
	Other retail			424			24
	Total impaired loans, excluding GNMA and covered loans			4,810			242
	Loans purchased from GNMA mortgage pools			1,967			100
	Covered loans			561			27
	Total		$	7,338		$	369
	2012
	Commercial		$	470		$	18
	Commercial real estate			1,314			43
	Residential mortgages			2,717			130
	Credit card			510			28
	Other retail			301			19
	Total impaired loans, excluding GNMA and covered loans			5,312			238
	Loans purchased from GNMA mortgage pools			1,448			73
	Covered loans			980			29
	Total		$	7,740		$	340
Summary of Loans Modified as TDRs	The following table provides a summary of loans modified as TDRs for the years ended December 31, by portfolio class:
	(Dollars in Millions)		Number			Pre-Modification			Post-Modification
			of Loans			Outstanding			Outstanding
						Loan			Loan
						Balance			Balance
	2014
	Commercial			2,027		$	238		$	203
	Commercial real estate			78			80			71
	Residential mortgages			2,089			271			274
	Credit card			26,511			144			145
	Other retail			2,833			61			61
	Total loans, excluding GNMA and covered loans			33,538			794			754
	Loans purchased from GNMA mortgage pools			8,961			1,000			1,013
	Covered loans			43			15			14
	Total loans			42,542		$	1,809		$	1,781
	2013
	Commercial			2,429		$	166		$	155
	Commercial real estate			165			205			198
	Residential mortgages			2,179			309			304
	Credit card			26,669			160			161
	Other retail			4,290			103			102
	Total loans, excluding GNMA and covered loans			35,732			943			920
	Loans purchased from GNMA mortgage pools			8,878			1,121			1,066
	Covered loans			123			94			72
	Total loans			44,733		$	2,158		$	2,058
	2012
	Commercial			4,843		$	307		$	272
	Commercial real estate			312			493			461
	Residential mortgages			4,616			638			623
	Credit card			49,320			241			255
	Other retail			10,461			279			275
	Total loans, excluding GNMA and covered loans			69,552			1,958			1,886
	Loans purchased from GNMA mortgage pools			9,518			1,280			1,245
	Covered loans			192			277			263
	Total loans			79,262		$	3,515		$	3,394
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) for the years ended December 31, that were modified as TDRs within 12 months previous to default:
	(Dollars in Millions)		Number			Amount
			of Loans			Defaulted
	2014
	Commercial			629		$	44
	Commercial real estate			22			12
	Residential mortgages			611			86
	Credit card			6,335			33
	Other retail			845			24
	Total loans, excluding GNMA and covered loans			8,442			199
	Loans purchased from GNMA mortgage pools			876			102
	Covered loans			14			5
	Total loans			9,332		$	306
	2013
	Commercial			642		$	46
	Commercial real estate			87			102
	Residential mortgages			1,099			163
	Credit card			6,640			37
	Other retail			1,841			80
	Total loans, excluding GNMA and covered loans			10,309			428
	Loans purchased from GNMA mortgage pools			4,972			640
	Covered loans			63			49
	Total loans			15,344		$	1,117
	2012
	Commercial			859		$	48
	Commercial real estate			111			232
	Residential mortgages			1,073			146
	Credit card			9,774			54
	Other retail			1,818			56
	Total loans, excluding GNMA and covered loans			13,635			536
	Loans purchased from GNMA mortgage pools			1,245			177
	Covered loans			68			97
	Total loans			14,948		$	810
Commercial Real Estate Loans by Property Type and Geography Excluding Covered Loans	TABLE 8    COMMERCIAL REAL ESTATE LOANS BY PROPERTY TYPE  AND GEOGRAPHY
			2014								2013
	At December 31 (Dollars in Millions)		Loans			Percent					Loans				Percent
	Property Type
	Business owner occupied		$	11,535			26.9	%			$	11,223				28.1	%
	Commercial property
	Industrial			1,582			3.7					1,567				3.9
	Office			5,680			13.3					5,173				13
	Retail			4,896			11.4					4,503				11.3
	Other commercial			4,670			10.9					4,253				10.7
	Multi-family			8,548			20					7,886				19.8
	Hotel/motel			3,624			8.5					3,251				8.1
	Residential homebuilders			1,996			4.7					1,728				4.3
	Health care facilities			264			0.6					301				0.8
	Total		$	42,795			100	%			$	39,885				100	%
	Geography
	California		$	10,545			24.6	%			$	9,148				22.9	%
	Colorado			1,955			4.6					1,781				4.5
	Illinois			2,153			5					1,586				4
	Minnesota			2,031			4.7					2,052				5.2
	Missouri			1,453			3.4					1,573				3.9
	Ohio			1,391			3.3					1,491				3.7
	Oregon			2,012			4.7					1,999				5
	Washington			3,501			8.2					3,548				8.9
	Wisconsin			2,293			5.4					2,410				6
	Iowa, Kansas, Nebraska, North Dakota, South Dakota			2,202			5.1					2,237				5.6
	Arkansas, Indiana, Kentucky, Tennessee			1,764			4.1					1,718				4.3
	Idaho, Montana, Wyoming			1,319			3.1					1,265				3.2
	Arizona, Nevada, New Mexico, Utah			3,383			7.9					3,214				8.1
	Total banking region			36,002			84.1					34,022				85.3
	Florida, Michigan, New York, Pennsylvania, Texas			3,656			8.6					3,178				8
	All other states			3,137			7.3					2,685				6.7
	Total outside Company’s banking region			6,793			15.9					5,863				14.7
	Total		$	42,795			100	%			$	39,885				100	%
Carrying Amount of Covered Assets	The carrying amount of the covered assets at December 31, consisted of purchased impaired loans, purchased nonimpaired loans and other assets as shown in the following table:
			2014														2013
	(Dollars in Millions)		Purchased			Purchased			Other				Total				Purchased			Purchased			Other			Total
			Impaired			Nonimpaired			Assets								Impaired			Nonimpaired			Assets
			Loans			Loans											Loans			Loans
	Commercial loans		$	–		$	–		$	–			$	–			$	–		$	32		$	–		$	32
	Commercial real estate loans			–			–			–				–				738			1,494			–			2,232
	Residential mortgage loans			2,784			738			–				3,522				3,037			890			–			3,927
	Credit card loans			–			–			–				–				–			5			–			5
	Other retail loans			–			584			–				584				–			666			–			666
	Losses reimbursable by the FDIC(a)			–			–			717				717				–			–			798			798
	Unamortized changes in FDIC asset(b)			–			–			458				458				–			–			802			802
	Covered loans			2,784			1,322			1,175				5,281				3,775			3,087			1,600			8,462
	Foreclosed real estate			–			–			37				37				–			–			97			97
	Total covered assets		$	2,784		$	1,322		$	1,212			$	5,318			$	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.
Commercial Loans by Industry Group and Geography Excluding Covered Loans	TABLE 7    COMMERCIAL LOANS BY INDUSTRY GROUP AND GEOGRAPHY
			2014								2013
	At December 31 (Dollars in Millions)		Loans			Percent					Loans				Percent
	Industry Group
	Manufacturing		$	12,261			15.3	%			$	10,738				15.3	%
	Finance and insurance			7,799			9.7					5,864				8.4
	Real estate, rental and leasing			7,779			9.7					6,788				9.7
	Wholesale trade			7,350			9.1					6,346				9.1
	Retail trade			6,428			8					5,401				7.7
	Healthcare and social assistance			5,280			6.6					5,048				7.2
	Public administration			4,033			5					3,934				5.6
	Professional, scientific and technical services			3,121			3.9					2,747				3.9
	Transport and storage			2,941			3.7					2,322				3.3
	Information			2,702			3.4					2,443				3.5
	Mining			2,604			3.2					2,094				3
	Arts, entertainment and recreation			2,493			3.1					2,214				3.2
	Educational services			2,286			2.8					2,222				3.2
	Agriculture, forestry, fishing and hunting			1,642			2					1,508				2.1
	Other services			1,449			1.8					1,507				2.1
	Utilities			1,404			1.7					1,374				2
	Other			8,805			11					7,483				10.7
	Total		$	80,377			100	%			$	70,033				100	%
	Geography
	California		$	9,961			12.4	%			$	8,748				12.5	%
	Colorado			3,528			4.4					2,970				4.2
	Illinois			4,108			5.1					3,539				5.1
	Minnesota			6,316			7.9					5,086				7.3
	Missouri			2,832			3.5					2,893				4.1
	Ohio			3,534			4.4					3,385				4.8
	Oregon			2,130			2.6					1,941				2.8
	Washington			3,237			4					2,823				4
	Wisconsin			3,090			3.8					2,768				4
	Iowa, Kansas, Nebraska, North Dakota, South Dakota			4,400			5.5					4,091				5.8
	Arkansas, Indiana, Kentucky, Tennessee			4,949			6.2					4,024				5.8
	Idaho, Montana, Wyoming			1,475			1.8					1,148				1.6
	Arizona, Nevada, New Mexico, Utah			2,951			3.7					2,917				4.2
	Total banking region			52,511			65.3					46,333				66.2
	Florida, Michigan, New York, Pennsylvania, Texas			14,036			17.5					11,762				16.8
	All other states			13,830			17.2					11,938				17
	Total outside Company’s banking region			27,866			34.7					23,700				33.8
	Total		$	80,377			100	%			$	70,033				100	%
Summary of Nonperforming Assets	TABLE 16    NONPERFORMING ASSETS(a)
	At December 31 (Dollars in Millions)		2014			2013			2012				2011				2010
	Commercial
	Commercial		$	99		$	122		$	107			$	280			$	519
	Lease financing			13			12			16				32				78
	Total commercial			112			134			123				312				597
	Commercial Real Estate
	Commercial mortgages			175			182			308				354				545
	Construction and development			84			121			238				545				748
	Total commercial real estate			259			303			546				899				1,293
	Residential Mortgages(b)			864			770			661				650				636
	Credit Card			30			78			146				224				228
	Other Retail
	Retail leasing			1			1			1				–				–
	Other			186			190			216				67				65
	Total other retail			187			191			217				67				65
	Total nonperforming loans, excluding covered loans			1,452			1,476			1,693				2,152				2,819
	Covered Loans			14			127			386				926				1,244
	Total nonperforming loans			1,466			1,603			2,079				3,078				4,063
	Other Real Estate(c)(d)			288			327			381				404				511
	Covered Other Real Estate(d)			37			97			197				274				453
	Other Assets			17			10			14				18				21
	Total nonperforming assets		$	1,808		$	2,037		$	2,671			$	3,774			$	5,048
	Total nonperforming assets, excluding covered assets		$	1,757		$	1,813		$	2,088			$	2,574			$	3,351
	Excluding covered assets
	Accruing loans 90 days or more past due(b)		$	550		$	713		$	660			$	843			$	1,094
	Nonperforming loans to total loans			0.6	%		0.65	%		0.8	%			1.1	%			1.57	%
	Nonperforming assets to total loans plus other real estate(c)			0.72	%		0.8	%		0.98	%			1.32	%			1.87	%
	Including covered assets
	Accruing loans 90 days or more past due(b)		$	945		$	1,189		$	1,323			$	1,753			$	2,184
	Nonperforming loans to total loans			0.59	%		0.68	%		0.93	%			1.47	%			2.06	%
	Nonperforming assets to total loans plus other real estate(c)			0.73	%		0.86	%		1.19	%			1.79	%			2.55	%
	CHANGES IN NONPERFORMING ASSETS
	(Dollars in Millions)		Commercial and			Credit Card,			Covered				Total
			Commercial			Other Retail			Assets
			Real Estate			and Residential
						Mortgages
	Balance December 31, 2013		$	494		$	1,319		$	224			$	2,037
	Additions to nonperforming assets
	New nonaccrual loans and foreclosed properties			514			672			74				1,260
	Advances on loans			52			–			–				52
	Total additions			566			672			74				1,312
	Reductions in nonperforming assets
	Paydowns, payoffs			(248	)		(244	)		(171	)			(663	)
	Net sales			(120	)		(127	)		(72	)			(319	)
	Return to performing status			(21	)		(130	)		(2	)			(153	)
	Charge-offs(e)			(240	)		(164	)		(2	)			(406	)
	Total reductions			(629	)		(665	)		(247	)			(1,541	)
	Net additions to (reductions in) nonperforming assets			(63	)		7			(173	)			(229	)
	Balance December 31, 2014		$	431		$	1,326		$	51			$	1,808
	(a)	Throughout this document, nonperforming assets and related ratios do not include accruing loans 90 days or more past due.
	(b)	Excludes $3.1 billion, $3.7 billion, $3.2 billion, $2.6 billion and $2.6 billion at December 31, 2014, 2013, 2012, 2011 and 2010, respectively, of loans purchased from GNMA mortgage pools that are 90 days or more past due that continue to accrue interest, as their repayments are primarily insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs.
	(c)	Foreclosed GNMA loans of $641 million, $527 million, $548 million, $692 million and $575 million at December 31, 2014, 2013, 2012, 2011 and 2010, respectively, continue to accrue interest and are recorded as other assets and excluded from nonperforming assets because they are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs.
	(d)	Includes equity investments in entities whose principal assets are other real estate owned.
	(e)	Charge-offs exclude actions for certain card products and loan sales that were not classified as nonperforming at the time the charge-off occurred.

Leases_Tables

Leases (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Components of Net Investment in Sales-Type and Direct Financing Leases	The components of the net investment in sales-type and direct financing leases at December 31 were as follows:
	(Dollars in Millions)		2014			2013
	Aggregate future minimum lease payments to be received		$	11,173		$	11,074
	Unguaranteed residual values accruing to the lessor’s benefit			695			783
	Unearned income			(1,004	)		(1,045	)
	Initial direct costs			202			189
	Total net investment in sales-type and direct financing leases(a)		$	11,066		$	11,001
	(a)	The accumulated allowance for uncollectible minimum lease payments was $65 million and $68 million at December 31, 2014 and 2013, respectively.
Minimum Future Lease Payments to be Received from Sales-Type and Direct Financing Leases	The minimum future lease payments to be received from sales-type and direct financing leases were as follows at December 31, 2014:
	(Dollars in Millions)
	2015			3,696
	2016			3,417
	2017			2,601
	2018			813
	2019			291
	Thereafter			355

Accounting_for_Transfers_and_S1

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 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:
	At December 31 (Dollars in Millions)	2014		2013
	Investment carrying amount	$	4,259	$	4,178
	Unfunded capital and other commitments		1,743		1,661
	Maximum exposure to loss		8,393		7,390

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and equipment at December 31 consisted of the following:
	(Dollars in Millions)	2014			2013
	Land	$	534		$	529
	Buildings and improvements		3,323			3,256
	Furniture, fixtures and equipment		2,719			2,593
	Capitalized building and equipment leases		126			103
	Construction in progress		26			24
			6,728			6,505
	Less accumulated depreciation and amortization		(4,110	)		(3,899	)
	Total	$	2,618		$	2,606

Mortgage_Servicing_Rights_Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Changes in Fair Value of Capitalized MSRs	Changes in fair value of capitalized MSRs for the years ended December 31, are summarized as follows:
	(Dollars in Millions)		2014			2013			2012
	Balance at beginning of period		$	2,680		$	1,700		$	1,519
	Rights purchased			5			8			42
	Rights capitalized			382			769			957
	Rights sold			(141	)		–			–
	Changes in fair value of MSRs
	Due to fluctuations in market interest rates(a)			(276	)		617			(249	)
	Due to revised assumptions or models(b)			86			33			(21	)
	Other changes in fair value(c)			(398	)		(447	)		(548	)
	Balance at end of period		$	2,338		$	2,680		$	1,700
	(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. In addition, 2014 includes a $44 million revaluation gain related to excess servicing rights sold.
	(c)	Primarily represents changes due to realization of expected cash flows over time (decay).
Sensitivity to Changes in Market Interest Rates to Fair Value of MSRs Portfolio and Related Derivative Instruments	The estimated sensitivity to changes in market interest rates of the fair value of the MSRs portfolio and the related derivative instruments as of December 31 follows:
			2014																		2013
	(Dollars in Millions)		Down			Down			Down			Up			Up			Up			Down			Down			Down			Up			Up			Up
			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps			100 bps			50 bps			25 bps			25 bps			50 bps			100 bps
	MSR portfolio		$	(540	)	$	(242	)	$	(114	)	$	100		$	185		$	346		$	(435	)	$	(199	)	$	(93	)	$	82		$	154		$	287
	Derivative instrument hedges			441			223			109			(102	)		(197	)		(375	)		399			194			91			(82	)		(157	)		(301	)
	Net sensitivity		$	(99	)	$	(19	)	$	(5	)	$	(2	)	$	(12	)	$	(29	)	$	(36	)	$	(5	)	$	(2	)	$	–		$	(3	)	$	(14	)
MSRs and Related Characteristics by Portfolio	A summary of the Company’s MSRs and related characteristics by portfolio as of December 31 follows:
			2014												2013
	(Dollars in Millions)		MRBP			Government			Conventional(b)			Total			MRBP			Government			Conventional(b)			Total
	Servicing portfolio		$	19,706		$	40,471		$	162,620		$	222,797		$	15,896		$	41,659		$	169,287		$	226,842
	Fair value		$	213		$	426		$	1,699		$	2,338		$	180		$	500		$	2,000		$	2,680
	Value (bps)(a)			108			105			104			105			113			120			118			118
	Weighted-average servicing fees (bps)			37			33			27			29			39			32			29			30
	Multiple (value/servicing fees)			2.92			3.18			3.85			3.62			2.9			3.75			4.07			3.93
	Weighted-average note rate			4.58	%		4.18	%		4.14	%		4.19	%		4.7	%		4.24	%		4.17	%		4.22	%
	Weighted-average age (in years)			3.6			3.2			3.1			3.2			3.8			2.6			2.5			2.6
	Weighted-average expected prepayment (constant prepayment rate)			12.8	%		14.8	%		11.4	%		12.1	%		13.5	%		11.5	%		10.9	%		11.2	%
	Weighted-average expected life (in years)			6.2			5.5			6.5			6.3			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.

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets consisted of the following:
			Estimated		Amortization			Balance
	At December 31 (Dollars in Millions)		Life(a)		Method(b)			2014			2013
	Goodwill					(c	)	$	9,389		$	9,205
	Merchant processing contracts			9 years/8 years		SL/AC			174			229
	Core deposit benefits			22 years/5 years		SL/AC			234			135
	Mortgage servicing rights					(c	)		2,338			2,680
	Trust relationships			10 years/6 years		SL/AC			97			122
	Other identified intangibles			6 years/5 years		SL/AC			319			363
	Total							$	12,551		$	12,734
	(a)	Estimated life represents the amortization period for assets subject to the straight line method and the weighted average or life of the underlying cash flows amortization period for intangibles subject to accelerated methods. If more than one amortization method is used for a category, the estimated life for each method is calculated and reported separately.
	(b)  Amortization methods:		SL =traight line method
			AC =ccelerated methods generally based on cash flows
	(c)	Goodwill is evaluated for impairment, but not amortized. Mortgage servicing rights are recorded at fair value, and are not amortized.
Aggregate Amortization Expense	Aggregate amortization expense consisted of the following:
	Year Ended December 31 (Dollars in Millions)		2014		2013			2012
	Merchant processing contracts		$	50	$	64		$	74
	Core deposit benefits			38		41			60
	Trust relationships			27		34			39
	Other identified intangibles			84		84			101
	Total		$	199	$	223		$	274
Estimated Amortization Expense	The estimated amortization expense for the next five years is as follows:
	(Dollars in Millions)
	2015		$	169
	2016			139
	2017			118
	2018			97
	2019			75
Changes in Carrying Value of Goodwill	The following table reflects the changes in the carrying value of goodwill for the years ended December 31, 2014, 2013 and 2012:
	(Dollars in Millions)		Wholesale Banking and		Consumer and Small			Wealth Management and			Payment			Treasury and		Consolidated
			Commercial Real Estate		Business Banking			Securities Services			Services			Corporate Support		Company
	Balance at December 31, 2011		$	1,605	$	3,514		$	1,463		$	2,345		$	–	$	8,927
	Goodwill acquired			–		–			65			143			–		208
	Other(a)			–		–			–			8			–		8
	Balance at December 31, 2012		$	1,605	$	3,514		$	1,528		$	2,496		$	–	$	9,143
	Goodwill acquired			–		–			37			20			–		57
	Other(a)			–		–			–			5			–		5
	Balance at December 31, 2013		$	1,605	$	3,514		$	1,565		$	2,521		$	–	$	9,205
	Goodwill acquired			43		166			8			–			–		217
	Other(a)			–		–			(3	)		(30	)		–		(33	)
	Balance at December 31, 2014		$	1,648	$	3,680		$	1,570		$	2,491		$	–	$	9,389
	(a)	Other changes in goodwill include the effect of foreign exchange translation.

ShortTerm_Borrowings_Tables

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Summary of Short-Term Borrowings	The following table is a summary of short-term borrowings for the last three years:
			2014					2013					2012
	(Dollars in Millions)		Amount		Rate			Amount		Rate			Amount		Rate
	At year-end
	Federal funds purchased		$	886		0.12	%	$	594		0.11	%	$	950		0.11	%
	Securities sold under agreements to repurchase			948		0.05			2,057		5.34			3,388		3.26
	Commercial paper			22,197		0.12			19,400		0.11			16,202		0.12
	Other short-term borrowings			5,862		0.51			5,557		0.19			5,762		0.29
	Total		$	29,893		0.19	%	$	27,608		0.52	%	$	26,302		0.57	%
	Average for the year
	Federal funds purchased(b)		$	2,366		7.94	%	$	1,879		9.72	%	$	1,338		15.32	%
	Securities sold under agreements to repurchase			798		1.07			2,403		4.65			4,942		3.52
	Commercial paper			21,227		0.12			17,467		0.12			15,806		0.14
	Other short-term borrowings			5,861		0.78			5,934		0.72			6,463		0.72
	Total(b)		$	30,252		0.88	%	$	27,683		1.29	%	$	28,549		1.57	%
	Maximum month-end balance
	Federal funds purchased		$	3,258				$	3,569				$	2,467
	Securities sold under agreements to repurchase			948					3,121					5,922
	Commercial paper			22,322					19,400					17,385
	Other short-term borrowings			7,417					6,301					7,443
	(a)	Interest and rates are presented on a fully taxable-equivalent basis utilizing a tax rate of 35 percent.
	(b)	Average federal funds purchased and total short-term borrowings rates include amounts paid by the Company to certain corporate card customers for paying outstanding noninterest-bearing corporate card balances within certain timeframes per specific agreements. These activities reduce the Company’s short-term funding needs, and if they did not occur, the Company would use other funding alternatives, including the use of federal funds purchased. The amount of this compensation expense paid by the Company and included in federal funds purchased and total short-term borrowings rates for 2014, 2013 and 2012 was $186 million, $181 million and $203 million, respectively.

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Summary of Long-term Debt	Long-term debt (debt with original maturities of more than one year) at December 31 consisted of the following:
	(Dollars in Millions)		Rate Type		Rate(a)			Maturity Date		2014		2013
	U.S. Bancorp (Parent Company)
	Subordinated notes			Fixed		2.95	%		2022	$	1,300	$	1,300
				Fixed		3.6	%		2024		1,000		–
				Fixed		7.5	%		2026		199		199
	Medium-term notes			Fixed		1.650% - 4.125	%		2015 - 2024		9,250		8,750
				Floating		.634% - .722	%		2018 - 2019		750		500
	Junior subordinated debentures			Fixed		3.442	%		2016		500		500
	Capitalized lease obligations, mortgage indebtedness and other(b)										190		167
	Subtotal										13,189		11,416
	Subsidiaries
	Subordinated notes			Fixed		6.3	%		2014		–		963
				Fixed		4.95	%		2014		–		1,000
				Fixed		4.8	%		2015		500		500
				Fixed		3.778	%		2020		500		500
				Floating		0.524	%		2014		–		373
	Federal Home Loan Bank advances			Fixed		1.250% - 8.250	%		2017 - 2026		11		13
				Floating		.236% - .507	%		2015 - 2022		7,334		4,579
	Bank notes			Fixed		1.100% - 2.125	%		2017 - 2019		4,050		–
				Floating		–% - .713	%		2015 - 2054		6,069		142
	Capitalized lease obligations, mortgage indebtedness and other(b)										607		563
	Subtotal										19,071		8,633
	Total									$	32,260	$	20,049
	(a)	Weighted-average interest rates of medium-term notes, Federal Home Loan Bank advances and bank notes were 2.47 percent, .31 percent and .85 percent, respectively.
	(b)	Other includes consolidated community development and tax-advantaged investment VIEs, debt issuance fees, and unrealized gains and losses and deferred amounts relating to derivative instruments.
Maturities of Long-term Debt Outstanding	Maturities of long-term debt outstanding at December 31, 2014, were:
	(Dollars in Millions)		Parent		Consolidated
			Company
	2015		$	1,750	$	4,754
	2016			1,931		6,343
	2017			1,248		7,135
	2018			1,497		3,524
	2019			1,506		3,488
	Thereafter			5,257		7,016
	Total		$	13,189	$	32,260

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock	The number of shares issued and outstanding and the carrying amount of each outstanding series of the Company’s preferred stock was as follows:
			2014																2013
	At December 31,		Shares			Liquidation			Discount				Carrying						Shares				Liquidation		Discount		Carrying
	(Dollars in Millions)		Issued and			Preference							Amount						Issued and				Preference				Amount
			Outstanding																Outstanding
	Series A			12,510		$	1,251		$	145			$	1,106						12,510			$	1,251	$	145	$	1,106
	Series B			40,000			1,000			–				1,000						40,000				1,000		–		1,000
	Series F			44,000			1,100			12				1,088						44,000				1,100		12		1,088
	Series G			43,400			1,085			10				1,075						43,400				1,085		10		1,075
	Series H			20,000			500			13				487						20,000				500		13		487
	Total preferred stock(a)			159,910		$	4,936		$	180			$	4,756						159,910			$	4,936	$	180	$	4,756
	(a)	The par value of all shares issued and outstanding at December 31, 2014 and 2013, was $1.00 per share.
Common Stock Repurchased	The following table summarizes the Company’s common stock repurchased in each of the last three years:
	(Dollars and Shares in Millions)		Shares			Value
	2014			54		$	2,262
	2013			65			2,336
	2012			59			1,878
Reconciliation of Transactions Affecting Accumulated Other Comprehensive Income (Loss) Included in Shareholders' Equity	Shareholders’ equity is affected by transactions and valuations of asset and liability positions that require adjustments to accumulated other comprehensive income (loss). The reconciliation of the transactions affecting accumulated other comprehensive income (loss) included in shareholders’ equity for the years ended December 31, is as follows:
	(Dollars in Millions)		Unrealized Gains			Unrealized Gains			Unrealized Gains				Unrealized Gains				Foreign Currency				Total
			(Losses) on			(Losses) on			(Losses) on				(Losses) on				Translation
			Securities			Securities			Derivative Hedges				Retirement Plans
			Available-For-Sale			Transferred From
						Available-For-Sale
						to  Held-To-Maturity
	2014
	Balance at beginning of period		$	(77	)	$	70		$	(261	)		$	(743	)		$	(60	)		$	(1,071	)
	Changes in unrealized gains and losses			764			–			(41	)			(733	)			–				(10	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			1			–			–				–				–				1
	Foreign currency translation adjustment			–			–			–				–				(4	)			(4	)
	Reclassification to earnings of realized gains and losses			(3	)		(30	)		186				144				–				297
	Applicable income taxes			(293	)		12			(56	)			226				2				(109	)
	Balance at end of period		$	392		$	52		$	(172	)		$	(1,106	)		$	(62	)		$	(896	)
	2013
	Balance at beginning of period		$	679		$	107		$	(404	)		$	(1,265	)		$	(40	)		$	(923	)
	Changes in unrealized gains and losses			(1,223	)		–			37				590				–				(596	)
	Other-than-temporary impairment not recognized in earnings on securities available-for-sale			8			–			–				–				–				8
	Foreign currency translation adjustment			–			–			–				–				(34	)			(34	)
	Reclassification to earnings of realized gains and losses			(9	)		(59	)		192				249				–				373
	Applicable income taxes			468			22			(86	)			(317	)			14				101
	Balance at end of period		$	(77	)	$	70		$	(261	)		$	(743	)		$	(60	)		$	(1,071	)
	2012
	Balance at beginning of period		$	360		$	–		$	(489	)		$	(1,022	)		$	(49	)		$	(1,200	)
	Changes in unrealized gains and losses			715			–			(74	)			(543	)			–				98
	Other-than-temporary impairment not recognized in earnings on available-for-sale securities securities available-for-sale			12			–			–				–				–				12
	Transfer of securities from available-for-sale to held-to-maturity			(224	)		224			–				–				–				–
	Foreign currency translation adjustment			–			–			–				–				14				14
	Reclassification to earnings of realized gains and losses			15			(51	)		211				150				–				325
	Applicable income taxes			(199	)		(66	)		(52	)			150				(5	)			(172	)
	Balance at end of period		$	679		$	107		$	(404	)		$	(1,265	)		$	(40	)		$	(923	)
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 for the years ended December 31, is as follows:
			Impact to						Affected Line Item in the
			Net Income						Consolidated Statement of Income
	(Dollars in Millions)		2014			2013
	Unrealized gains (losses) on securities available-for-sale
	Realized gains (losses) on sale of securities		$	11		$	23		Total securities gains (losses), net
	Other-than-temporary impairment recognized in earnings			(8	)		(14	)
				3			9		Total before tax
				(1	)		(4	)	Applicable income taxes
				2			5		Net-of-tax
	Unrealized gains (losses) on securities transferred from available-for-sale to held-to-maturity
	Amortization of unrealized gains			30			59		Interest income
				(12	)		(22	)	Applicable income taxes
				18			37		Net-of-tax
	Unrealized gains (losses) on derivative hedges
	Realized gains (losses) on derivative hedges			(186	)		(192	)	Net interest income
				71			74		Applicable income taxes
				(115	)		(118	)	Net-of-tax
	Unrealized gains (losses) on retirement plans
	Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization			(144	)		(249	)	Employee benefits expense
				56			96		Applicable income taxes
				(88	)		(153	)	Net-of-tax
	Total impact to net income		$	(183	)	$	(229	)
Components of Company's Regulatory Capital	The following table provides the components of the Company’s regulatory capital at December 31:
	(Dollars in Millions)		2014			2013
	Basel III transitional standardized approach/Basel I:
	Common shareholders’ equity		$	38,723		$	36,357
	Less intangible assets
	Goodwill (net of deferred tax liability)			(8,403	)		(8,343	)
	Other disallowed intangible assets			(165	)		(708	)
	Other(a)			701			636
	Total common equity tier 1 capital			30,856
	Qualifying preferred stock			4,756			4,756
	Noncontrolling interests eligible for tier 1 capital			408			688
	Total tier 1 capital			36,020			33,386
	Eligible portion of allowance for credit losses			3,957			3,734
	Subordinated debt and noncontrolling interests eligible for tier 2 capital			3,215			2,299
	Other			16			(79	)
	Total tier 2 capital			7,188			5,954
	Total risk-based capital		$	43,208		$	39,340
	Risk-weighted assets		$	317,398		$	297,919
	Basel III transitional advanced approaches:
	Common shareholders’ equity		$	38,723
	Less intangible assets
	Goodwill (net of deferred tax liability)			(8,403	)
	Other disallowed intangible assets			(165	)
	Other(a)			701
	Total common equity tier 1 capital			30,856
	Qualifying preferred stock			4,756
	Noncontrolling interests eligible for tier 1 capital			408
	Total tier 1 capital			36,020
	Eligible portion of allowance for credit losses			1,224
	Subordinated debt and noncontrolling interests eligible for tier 2 capital			3,215
	Other			16
	Total tier 2 capital			4,455
	Total risk-based capital		$	40,475
	Risk-weighted assets		$	248,596
	Note:	December 31, 2014 amounts calculated under the Basel III transitional standardized and advanced approaches, with the Company being evaluated for capital adequacy against the approach that is most restrictive. December 31, 2013 amounts calculated under Basel I.
	(a)	Includes the impact of items included in other comprehensive income (loss), such as unrealized gains (losses) on available-for-sale securities, accumulated net gains on cash flow hedges, pension liability adjustments, etc.
Regulatory Capital Ratios	TABLE 22    REGULATORY CAPITAL RATIOS
			U.S. Bancorp								U.S. Bank National
											Association
	At December 31 (Dollars in Millions)		2014			2013					2014				2013
	Basel III transitional standardized approach/Basel I:
	Common equity tier 1 capital(a)		$	30,856							$	32,381
	Tier 1 capital			36,020		$	33,386					32,789			$	30,167
	Total risk-based capital			43,208			39,340					40,008				36,392
	Risk-weighted assets			317,398			297,919					313,261				293,335
	Common equity tier 1 capital as a percent of risk-weighted assets(a)			9.7	%							10.3	%
	Tier 1 capital as a percent of risk-weighted assets			11.3			11.2	%				10.5				10.3	%
	Total risk-based capital as a percent of risk-weighted assets			13.6			13.2					12.8				12.4
	Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)			9.3			9.6					8.6				8.8
	Basel III transitional advanced approaches:
	Common equity tier 1 capital(a)		$	30,856							$	32,381
	Tier 1 capital			36,020								32,789
	Total risk-based capital			40,475								37,299
	Risk-weighted assets			248,596								245,007
	Common equity tier 1 capital as a percent of risk-weighted assets(a)			12.4	%							13.2	%
	Tier 1 capital as a percent of risk-weighted assets			14.5								13.4
	Total risk-based capital as a percent of risk-weighted assets			16.3								15.2
	BANK REGULATORY CAPITAL REQUIREMENTS
						Minimum			Well-
									Capitalized
	2014
	Common equity tier 1 capital as a percent of risk-weighted assets						4	%		*
	Tier 1 capital as a percent of risk-weighted assets						5.5			6	%
	Total risk-based capital as a percent of risk-weighted assets						8			10
	Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)						4			5
	2013
	Tier 1 capital as a percent of risk-weighted assets						4	%		6	%
	Total risk-based capital as a percent of risk-weighted assets						8			10
	Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)						4			5
	*	Not applicable.
	Note:	December 31, 2014 amounts calculated under the Basel III transitional standardized and advanced approaches, with the Company being evaluated for capital adequacy against the approach that is most restrictive. December 31, 2013 amounts calculated under Basel I.
	(a)	Beginning January 1, 2014, the regulatory capital requirements effective for the Company include a common equity tier 1 capital as a percent of risk-weighted assets ratio.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Components of Earnings Per Share	The components of earnings per share were:
	Year Ended December 31		2014			2013			2012
	(Dollars and Shares in Millions, Except Per Share Data)
	Net income attributable to U.S. Bancorp		$	5,851		$	5,836		$	5,647
	Preferred dividends			(243	)		(250	)		(238	)
	Impact of preferred stock redemption(a)			–			(8	)		–
	Earnings allocated to participating stock awards			(25	)		(26	)		(26	)
	Net income applicable to U.S. Bancorp common shareholders		$	5,583		$	5,552		$	5,383
	Average common shares outstanding			1,803			1,839			1,887
	Net effect of the exercise and assumed purchase of stock awards			10			10			9
	Average diluted common shares outstanding			1,813			1,849			1,896
	Earnings per common share		$	3.1		$	3.02		$	2.85
	Diluted earnings per common share		$	3.08		$	3		$	2.84
	(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)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Summary of Changes in Projected Benefit Obligation, Plan Assets, Funded Status, Amounts Recognized in Consolidated Balance Sheet and Accumulated Other Comprehensive Income (Loss)	The following table summarizes the changes in benefit obligations and plan assets for the years ended December 31, and the funded status and amounts recognized in the Consolidated Balance Sheet at December 31 for the retirement plans:
			Pension Plans						Postretirement
									Welfare Plan
	(Dollars in Millions)		2014			2013			2014			2013
	Change In Projected Benefit Obligation
	Benefit obligation at beginning of measurement period		$	3,895		$	4,096		$	100		$	142
	Service cost			152			168			–			3
	Interest cost			197			170			3			4
	Participants’ contributions			–			–			11			10
	Plan amendments			–			–			–			(35	)
	Actuarial loss (gain)			781			(388	)		13			(2	)
	Lump sum settlements(a)			(286	)		(34	)		–			–
	Benefit payments			(127	)		(117	)		(25	)		(24	)
	Federal subsidy on benefits paid			–			–			2			2
	Benefit obligation at end of measurement period(b)		$	4,612		$	3,895		$	104		$	100
	Change In Fair Value Of Plan Assets
	Fair value at beginning of measurement period		$	2,831		$	2,321		$	92		$	105
	Actual return on plan assets			269			343			–			–
	Employer contributions			500			318			7			1
	Participants’ contributions			–			–			11			10
	Lump sum settlements(a)			(286	)		(34	)		–			–
	Benefit payments			(127	)		(117	)		(25	)		(24	)
	Fair value at end of measurement period		$	3,187		$	2,831		$	85		$	92
	Funded (Unfunded) Status		$	(1,425	)	$	(1,064	)	$	(19	)	$	(8	)
	Components Of The Consolidated Balance Sheet
	Current benefit liability		$	(21	)	$	(20	)	$	–		$	–
	Noncurrent benefit liability			(1,404	)		(1,044	)		(19	)		(8	)
	Recognized amount		$	(1,425	)	$	(1,064	)	$	(19	)	$	(8	)
	Accumulated Other Comprehensive Income (Loss), Pretax
	Net actuarial gain (loss)		$	(1,894	)	$	(1,333	)	$	55		$	75
	Net prior service credit (cost)			11			16			31			34
	Recognized amount		$	(1,883	)	$	(1,317	)	$	86		$	109
	(a)	2014 includes $242 million of payments as a result of a bulk lump sum offering to certain deferred vested participants.
	(b)	At December 31, 2014 and 2013, the accumulated benefit obligation for all pension plans was $4.3 billion and $3.6 billion, respectively.
Pension Plans with Benefit Obligations in Excess of Plan Assets	The following table provides information for pension plans with benefit obligations in excess of plan assets at December 31:
	(Dollars in Millions)		2014			2013
	Pension Plans with Projected Benefit Obligations in Excess of Plan Assets
	Projected benefit obligation		$	4,612		$	3,853
	Fair value of plan assets			3,187			2,787
	Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets
	Projected benefit obligation		$	4,612		$	3,853
	Accumulated benefit obligation			4,250			3,566
	Fair value of plan assets			3,187			2,787
Components of Net Periodic Benefit Cost and Other Amounts Recognized in Accumulated Other Comprehensive Income (Loss)	The following table sets forth the components of net periodic benefit cost and other amounts recognized in accumulated other comprehensive income (loss) for the years ended December 31 for the retirement plans:
			Pension Plans									Postretirement Welfare Plan
	(Dollars in Millions)		2014			2013			2012			2014			2013			2012
	Components Of Net Periodic Benefit Cost
	Service cost		$	152		$	168		$	129		$	–		$	3		$	5
	Interest cost			197			170			168			3			4			7
	Expected return on plan assets			(208	)		(176	)		(191	)		(1	)		(2	)		(2	)
	Prior service cost (credit) and transition obligation (asset) amortization			(5	)		(5	)		(4	)		(3	)		(1	)		–
	Actuarial loss (gain) amortization			158			264			161			(6	)		(9	)		(7	)
	Net periodic benefit cost		$	294		$	421		$	263		$	(7	)	$	(5	)	$	3
	Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income (Loss)
	Net actuarial gain (loss) arising during the year		$	(719	)	$	555		$	(567	)	$	(14	)	$	–		$	24
	Net actuarial loss (gain) amortized during the year			158			264			161			(6	)		(9	)		(7	)
	Net prior service credit (cost) arising during the year			–			–			–			–			35			–
	Net prior service cost (credit) and transition obligation (asset) amortized during the year			(5	)		(5	)		(4	)		(3	)		(1	)		–
	Total recognized in other comprehensive income (loss)		$	(566	)	$	814		$	(410	)	$	(23	)	$	25		$	17
	Total recognized in net periodic benefit cost and other comprehensive income (loss)(a)(b)		$	(860	)	$	393		$	(673	)	$	(16	)	$	30		$	14
	(a)	The pretax estimated actuarial loss (gain) and prior service cost (credit) for the pension plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in 2015 are $235 million and $(5) million, respectively.
	(b)	The pretax estimated actuarial loss (gain) and prior service cost (credit) for the postretirement welfare plan that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in 2015 are $(4) million and $(3) million, respectively.
Weighted Average Assumptions to Determine Projected Benefit Obligations	The following table sets forth weighted average assumptions used to determine the projected benefit obligations at December 31:
			Pension Plans						Postretirement
									Welfare Plan
	(Dollars in Millions)		2014			2013			2014			2013
	Discount rate(a)			4.13	%		4.97	%		3.46	%		3.93	%
	Rate of compensation increase(b)			4.07			4.02			*			*
	Health care cost trend rate for the next year(c)									7	%		7.5	%
	Effect on accumulated postretirement benefit obligation
	One percent increase								$	6		$	5
	One percent decrease									(5	)		(4	)
	(a)	The discount rates were developed using a cash flow matching bond model with a modified duration for the qualified pension plans, non-qualified pension plans and postretirement welfare plan of 15.9, 12.4, and 6.8 years, respectively, for 2014, and 14.6, 11.5 and 6.4 years, respectively, for 2013.
	(b)	Determined on an active liability weighted basis.
	(c)	The rate is assumed to decrease gradually to 5.00 percent by 2019 and remain at this level thereafter.
	*	Not applicable
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost	The following table sets forth weighted average assumptions used to determine net periodic benefit cost for the years ended December 31:
			Pension Plans									Postretirement Welfare Plan
	(Dollars in Millions)		2014			2013			2012			2014			2013			2012
	Discount rate(a)			4.97	%		4.07	%		5.07	%		3.93	%		3.1	%		4.3	%
	Expected return on plan assets(b)			7.5			7.5			8			1.5			1.5			2.25
	Rate of compensation increase(c)			4.02			4.08			4.05			*			*			*
	Health care cost trend rate(d)
	Prior to age 65												7.5	%		8	%		8	%
	After age 65												7.5			8			12
	Effect on total of service cost and interest cost
	One percent increase											$	–		$	–		$	–
	One percent decrease												–			–			–
	(a)	The discount rates were developed using a cash flow matching bond model with a modified duration for the qualified pension plans, non-qualified pension plans and postretirement welfare plan of 14.6, 11.5 and 6.4 years, respectively, for 2014, and 15.9, 12.2 and 7.2 years, respectively, for 2013.
	(b)	With the help of an independent pension consultant, the Company considers several sources when developing its expected long-term rates of return on plan assets assumptions, including, but not limited to, past returns and estimates of future returns given the plans’ asset allocation, economic conditions, and peer group LTROR information. The Company determines its expected long-term rates of return reflecting current economic conditions and plan assets.
	(c)	Determined on an active liability weighted basis.
	(d)	The pre-65 and post-65 rates are both assumed to decrease gradually to 5.00 percent by 2019 and remain at that level thereafter.
	*	Not applicable
Summary of Plan Investment Assets Measured at Fair Value	The following table summarizes the plan investment assets measured at fair value at December 31:
			Pension Plans																		Postretirement
																					Welfare Plan
			2014									2013									2014			2013
	(Dollars in Millions)		Level 1			Level 2			Level 3			Level 1			Level 2			Level 3			Level 1			Level 1
	Cash and cash equivalents		$	78		$	–		$	–		$	62		$	–		$	–		$	85		$	92
	Debt securities			347			496			–			217			343			–			–			–
	Corporate stock
	Domestic equity securities			196			–			–			217			–			–			–			–
	Mid-small cap equity securities(a)			146			–			–			148			–			–			–			–
	International equity securities			197			–			–			229			–			–			–			–
	Real estate equity securities(b)			163			–			–			137			–			–			–			–
	Collective investment funds
	Domestic equity securities			–			539			–			–			538			–			–			–
	Mid-small cap equity securities(c)			–			54			–			–			58			–			–			–
	Emerging markets equity securities			–			75			–			–			58			–			–			–
	International equity securities			–			421			–			–			472			–			–			–
	Mutual funds
	Debt securities			–			219			–			–			177			–			–			–
	Emerging markets equity securities			–			81			–			–			75			–			–			–
	Hedge funds(d)			–			–			148			–			–			103			–			–
	Private equity			–			–			25			–			–			–			–			–
	Other			–			–			2			–			(7	)		4			–			–
	Total		$	1,127		$	1,885		$	175		$	1,010		$	1,714		$	107		$	85		$	92
	(a)	At December 31, 2014 and 2013, securities included $141 million in domestic equities, and $5 million and $7 million in international equities, respectively.
	(b)	At December 31, 2014 and 2013, securities included $89 million and $67 million in domestic equities, respectively, and $74 million and $70 million in international equities, respectively.
	(c)	At December 31, 2014 and 2013, securities included $25 million and $26 million in domestic equities, respectively, $27 million and $22 million in international equities, respectively, and $2 million and $10 million in cash and cash equivalents, respectively.
	(d)	This category consists of several investment strategies diversified across several hedge fund managers.
Summarizes the Changes for all Plan Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3)	The following table summarizes the changes in fair value for all plan investment assets measured at fair value using significant unobservable inputs (Level 3) for the years ended December 31:
			2014									2013									2012
	(Dollars in Millions)		Hedge			Private			Other			Debt			Hedge			Other			Debt			Other
			Funds			Equity						Securities			Funds						Securities
	Balance at beginning of period		$	103		$	–		$	4		$	7		$	–		$	3		$	7		$	6
	Unrealized gains (losses) relating to assets still held at end of year			7			(2	)		(2	)		–			–			–			1			(2	)
	Purchases, sales, and settlements, net			38			27			–			(7	)		103			1			(1	)		(1	)
	Balance at end of period		$	148		$	25		$	2		$	–		$	103		$	4		$	7		$	3
Expected Future Benefit Payments	The following benefit payments are expected to be paid from the retirement plans for the years ended December 31:
	(Dollars in Millions)		Pension			Postretirement			Medicare Part D
			Plans			Welfare Plan(a)			Subsidy Receipts
	2015		$	177		$	14		$	2
	2016			188			13			2
	2017			197			12			2
	2018			207			12			2
	2019			214			11			2
	2020 – 2024			1,259			44			9
	(a)	Net of expected retiree contributions and before Medicare Part D subsidy.

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Options Outstanding and Exercised Under Prior and Existing Stock Incentive Plans	The following is a summary of stock options outstanding and exercised under prior and existing stock incentive plans of the Company:
	Year Ended December 31		Stock			Weighted-			Weighted-Average			Aggregate
			Options/Shares			Average			Remaining Contractual			Intrinsic Value
						Exercise Price			Term			(in millions)
	2014
	Number outstanding at beginning of period			46,724,765		$	29.12
	Granted			1,246,451			40.32
	Exercised			(13,851,590	)		29.59
	Cancelled(a)			(470,428	)		31.12
	Number outstanding at end of period(b)			33,649,198		$	29.31			4		$	526
	Exercisable at end of period			28,923,260		$	28.79			3.4		$	467
	2013
	Number outstanding at beginning of period			63,171,918		$	28.83
	Granted			1,168,011			33.99
	Exercised			(17,260,740	)		28.41
	Cancelled(a)			(354,424	)		29.22
	Number outstanding at end of period(b)			46,724,765		$	29.12			4.4		$	527
	Exercisable at end of period			39,556,000		$	29.19			3.8		$	444
	2012
	Number outstanding at beginning of period			75,823,941		$	27.6
	Granted			4,180,492			28.65
	Exercised			(15,681,323	)		23.12
	Cancelled(a)			(1,151,192	)		24.9
	Number outstanding at end of period(b)			63,171,918		$	28.83			4.9		$	196
	Exercisable at end of period			50,671,654		$	30.12			4.2		$	92
	(a)	Options cancelled include both non-vested (i.e., forfeitures) and vested options.
	(b)	Outstanding options include stock-based awards that may be forfeited in future periods. The impact of the estimated forfeitures is reflected in compensation expense.
Weighted Average Estimated Fair Value of Stock Options Granted and Assumptions Utilized by Company for Newly Issued Grants	The following table includes the weighted average estimated fair value of stock options granted and the assumptions utilized by the Company for newly issued grants:
	Year Ended December 31		2014			2013			2012
	Estimated fair value		$	11.38		$	12.13		$	10.19
	Risk-free interest rates			1.7	%		1	%		0.9	%
	Dividend yield			2.6	%		2.6	%		2.6	%
	Stock volatility factor			0.38			0.49			0.49
	Expected life of options (in years)			5.5			5.5			5.5
Summary of Certain Stock Option Activity	The following summarizes certain stock option activity of the Company:
	Year Ended December 31 (Dollars in Millions)		2014			2013			2012
	Fair value of options vested		$	33		$	41		$	49
	Intrinsic value of options exercised			171			144			143
	Cash received from options exercised			408			489			362
	Tax benefit realized from options exercised			66			56			75
Stock Options Outstanding Additional Information	Additional information regarding stock options outstanding as of December 31, 2014, is as follows:
			Outstanding Options									Exercisable Options
	Range of Exercise Prices		Shares			Weighted-			Weighted-			Shares		Weighted-
						Average			Average					Average
						Remaining			Exercise					Exercise
						Contractual			Price					Price
						Life (Years)
	$11.02 – $15.00			3,366,770			4.1		$	11.33			3,366,770	$	11.33
	$15.01 – $20.00			161,742			1.3			19.57			161,742		19.57
	$20.01 – $25.00			2,513,347			5.1			23.85			2,505,271		23.84
	$25.01 – $30.00			9,825,343			4.6			28.95			7,101,828		29.06
	$30.01 – $35.00			11,611,190			3.4			32.13			10,798,653		31.99
	$35.01 – $40.00			4,988,996			2.1			36.04			4,988,996		36.04
	$40.01 – $41.61			1,181,810			9.1			40.32			–		–
	Total			33,649,198			4		$	29.31			28,923,260	$	28.79
Summary of Company's Restricted Shares of Stock and Unit Awards	A summary of the status of the Company’s restricted shares of stock and unit awards is presented below:
			2014						2013					2012
	Year Ended December 31		Shares			Weighted-			Shares			Weighted-		Shares			Weighted-
						Average Grant-						Average Grant-					Average Grant-
						Date Fair						Date Fair					Date Fair
						Value						Value					Value
	Outstanding at beginning of period			8,653,859		$	29.96			8,935,743		$	25.04		8,995,295		$	22.46
	Granted			3,133,168			40.37			3,717,635			33.88		3,085,077			28.7
	Vested			(3,409,650	)		29.38			(3,744,411	)		22.17		(2,931,820	)		20.97
	Cancelled			(455,806	)		34.05			(255,108	)		29.18		(212,809	)		25.01
	Outstanding at end of period			7,921,571		$	34.09			8,653,859		$	29.96		8,935,743		$	25.04

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Components of Income Tax Expense	The components of income tax expense were:
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Federal
	Current	$	1,888		$	1,885		$	1,853
	Deferred		(126	)		(83	)		45
	Federal income tax		1,762			1,802			1,898
	State
	Current		331			216			334
	Deferred		(6	)		14			4
	State income tax		325			230			338
	Total income tax provision	$	2,087		$	2,032		$	2,236
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:
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Tax at statutory rate	$	2,798		$	2,717		$	2,704
	State income tax, at statutory rates, net of federal tax benefit		211			150			220
	Tax effect of
	Tax credits and benefits, net of related expenses		(701	)		(648	)		(479	)
	Tax-exempt income		(205	)		(212	)		(219	)
	Noncontrolling interests		(20	)		37			55
	Other items		4			(12	)		(45	)
	Applicable income taxes	$	2,087		$	2,032		$	2,236
Reconciliation of Changes in Federal, State and Foreign Unrecognized Tax Position Balances	A reconciliation of the changes in the federal, state and foreign unrecognized tax position balances are summarized as follows:
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Balance at beginning of period	$	264		$	302		$	479
	Additions for tax positions taken in prior years		31			44			73
	Additions for tax positions taken in the current year		4			–			5
	Exam resolutions		(22	)		(56	)		(245	)
	Statute expirations		(10	)		(26	)		(10	)
	Balance at end of period	$	267		$	264		$	302
Significant Components of the Company's Net Deferred Tax Asset (Liability)	The significant components of the Company’s net deferred tax asset (liability) follows:
	At December 31 (Dollars in Millions)	2014			2013
	Deferred Tax Assets
	Allowance for credit losses	$	1,652		$	1,722
	Accrued expenses		630			485
	Pension and postretirement benefits		437			277
	Federal, state and foreign net operating loss carryforwards		212			72
	Stock compensation		143			165
	Securities available-for-sale and financial instruments		–			172
	Partnerships and other investment assets		403			646
	Other deferred tax assets, net		208			179
	Gross deferred tax assets		3,685			3,718
	Deferred Tax Liabilities
	Leasing activities		(3,042	)		(2,872	)
	Mortgage servicing rights		(871	)		(835	)
	Goodwill and other intangible assets		(772	)		(666	)
	Loans		(212	)		(211	)
	Securities available-for-sale and financial instruments		(165	)		–
	Fixed assets		(90	)		(147	)
	Other deferred tax liabilities, net		(159	)		(210	)
	Gross deferred tax liabilities		(5,311	)		(4,941	)
	Valuation allowance		(101	)		(82	)
	Net Deferred Tax Asset (Liability)	$	(1,727	)	$	(1,305	)

Derivative_Instruments_Tables

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Asset and Liability Management Derivative Positions of Company	The following table summarizes the asset and liability management derivative positions of the Company:
			Asset Derivatives									Liability Derivatives
	(Dollars in Millions)		Notional			Fair			Weighted-Average			Notional			Fair			Weighted-Average
			Value			Value			Remaining			Value			Value			Remaining
									Maturity									Maturity
									In Years									In Years
	December 31, 2014
	Fair value hedges
	Interest rate contracts
	Receive fixed/pay floating swaps		$	2,750		$	65			5.69		$	–		$	–			–
	Cash flow hedges
	Interest rate contracts
	Pay fixed/receive floating swaps			272			6			7.76			5,748			315			1.94
	Receive fixed/pay floating swaps			250			–			0.16			–			–			–
	Net investment hedges
	Foreign exchange forward contracts			1,047			31			0.04			–			–			–
	Other economic hedges
	Interest rate contracts
	Futures and forwards
	Buy			4,839			45			0.07			60			–			0.08
	Sell			448			10			0.13			6,713			62			0.09
	Options
	Purchased			2,500			–			0.06			–			–			–
	Written			2,643			31			0.08			4			–			0.11
	Receive fixed/pay floating swaps			3,552			14			10.22			250			1			10.22
	Pay fixed/receive floating swaps			15			–			10.22			–			–			–
	Foreign exchange forward contracts			510			3			0.03			6,176			41			0.02
	Equity contracts			86			3			0.6			–			–			–
	Credit contracts			1,247			3			3.29			2,282			5			2.85
	Other(a)			58			4			0.03			390			48			3.2
	Total		$	20,217		$	215					$	21,623		$	472
	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 $58 million at December 31, 2014, and derivative liability swap agreements related to the sale of a portion of the Company’s Class B common shares of Visa Inc. The Visa swap agreements had a total notional value, fair value and weighted average remaining maturity of $332 million, $44 million and 3.75 years at December 31, 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-Average			Notional			Fair			Weighted-Average
			Value			Value			Remaining			Value			Value			Remaining
									Maturity									Maturity
									In Years									In Years
	December 31, 2014
	Interest rate contracts
	Receive fixed/pay floating swaps		$	21,724		$	888			6.09		$	5,880		$	24			3.79
	Pay fixed/receive floating swaps			4,622			26			3.27			21,821			892			6.08
	Options
	Purchased			4,409			10			3.79			24			–			2.42
	Written			24			–			2.42			4,375			10			3.79
	Futures
	Buy			1,811			–			0.22			226			–			0.45
	Sell			152			–			1.08			46			–			1.73
	Foreign exchange rate contracts
	Forwards, spots and swaps			17,062			890			0.52			14,645			752			0.59
	Options
	Purchased			976			39			0.44			–			–			–
	Written			–			–			–			976			39			0.44
	Total		$	50,780		$	1,853					$	47,993		$	1,717
	December 31, 2013
	Interest rate contracts
	Receive fixed/pay floating swaps		$	11,717		$	600			5.11		$	7,291		$	106			5.57
	Pay fixed/receive floating swaps			6,746			114			6.03			12,361			560			4.9
	Options
	Purchased			3,489			33			4.53			–			–			–
	Written			–			–			–			3,489			33			4.53
	Foreign exchange rate contracts
	Forwards, spots and swaps			10,970			457			0.59			9,975			427			0.62
	Options
	Purchased			364			11			0.53			–			–			–
	Written			–			–			–			364			11			0.53
	Total		$	33,286		$	1,215					$	33,480		$	1,137
Summary of Effective Portion of Gains (Losses) Recognized in Other Comprehensive Income (Loss) and Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	The table below shows the effective portion of the gains (losses) recognized in other comprehensive income (loss) and the gains (losses) reclassified from other comprehensive income (loss) into earnings (net-of-tax) for the years ended December 31:
			Gains (Losses) Recognized in									Gains (Losses) Reclassified from
			Other Comprehensive Income									Other Comprehensive Income (Loss)
			(Loss)									into Earnings
	(Dollars in Millions)		2014			2013			2012			2014			2013			2012
	Asset and Liability Management Positions
	Cash flow hedges
	Interest rate contracts(a)		$	(26	)	$	25		$	(46	)	$	(115	)	$	(118	)	$	(131	)
	Net investment hedges
	Foreign exchange forward contracts			130			(45	)		(19	)		–			–			–
	Non-derivative debt instruments			–			–			20			–			–			–
	Note:	Ineffectiveness on cash flow and net investment hedges was not material for the years ended December 31, 2014, 2013 and 2012.
	(a)	Gains (Losses) reclassified from other comprehensive income (loss) into interest income on loans and interest expense on long-term debt.
Summary of Gains (Losses) Recognized in Earnings for Fair Value Hedges, Other Economic Hedges and Customer-Related Positions	The table below shows the gains (losses) recognized in earnings for fair value hedges, other economic hedges and the customer-related positions for the years ended December 31:
	(Dollars in Millions)		Location of Gains (Losses)			2014			2013			2012
			Recognized in Earnings
	Asset and Liability Management Positions
	Fair value hedges(a)
	Interest rate contracts			Other noninterest income		$	29		$	(9	)	$	3
	Foreign exchange cross-currency swaps			Other noninterest income			–			–			42
	Other economic hedges
	Interest rate contracts
	Futures and forwards			Mortgage banking revenue			(122	)		615			437
	Purchased and written options			Mortgage banking revenue			287			243			854
	Receive fixed/pay floating swaps			Mortgage banking revenue			384			(322	)		175
	Foreign exchange forward contracts			Commercial products revenue			(29	)		49			(63	)
	Equity contracts			Compensation expense			2			2			2
	Credit contracts			Other noninterest income/expense			–			6			(8	)
	Other			Other noninterest income/expense			(43	)		–			–
	Customer-Related Positions
	Interest rate contracts
	Receive fixed/pay floating swaps			Other noninterest income			686			(361	)		(118	)
	Pay fixed/receive floating swaps			Other noninterest income			(652	)		378			124
	Foreign exchange rate contracts
	Forwards, spots and swaps			Commercial products revenue			66			51			50
	Purchased and written options			Commercial products revenue			1			–			–
	(a)	Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $(27) million, $8 million and $(3) million for the years ended December 31, 2014, 2013 and 2012, respectively. Gains (Losses) on items hedged by foreign exchange forward contracts included in noninterest income (expense), were $(44) million for the year ended December 31, 2012. The ineffective portion was immaterial for the years ended December 31, 2014, 2013 and 2012.

Netting_Arrangements_for_Certa1

Netting Arrangements for Certain Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet But Available for Offset in Event of Default	The following tables provide information on the Company’s netting adjustments, and items not offset on the Consolidated Balance Sheet but available for offset in the event of default:
			Gross		Gross Amounts			Net Amounts		Gross Amounts Not Offset on 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)
	December 31, 2014
	Derivative assets(d)		$	1,847	$	(870	)	$	977	$	(58	)	$	–		$	919
	Reverse repurchase agreements			40		–			40		(40	)		–			–
	Securities borrowed			638		–			638		–			(620	)		18
	Total		$	2,525	$	(870	)	$	1,655	$	(98	)	$	(620	)	$	937
	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 $258 million and $124 million of cash collateral related payables that were netted against derivative assets at December 31, 2014 and 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 $221 million and $55 million of derivative assets centrally cleared or otherwise not subject to netting arrangements at December 31, 2014 and 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 Amount
										Instruments(b)			Pledged(c)
	December 31, 2014
	Derivative liabilities(d)		$	1,847	$	(1,317	)	$	530	$	(58	)	$	–		$	472
	Repurchase agreements			948		–			948		(40	)		(908	)		–
	Securities loaned			47		–			47		–			(46	)		1
	Total		$	2,842	$	(1,317	)	$	1,525	$	(98	)	$	(954	)	$	473
	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 $705 million and $717 million of cash collateral related receivables that were netted against derivative liabilities at December 31, 2014 and 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 $342 million and $119 million of derivative liabilities centrally cleared or otherwise not subject to netting arrangements at December 31, 2014 and 2013, respectively.

Fair_Values_of_Assets_and_Liab1

Fair Values of Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Valuation Assumption Ranges for Level 3 Available-for-Sale Investment Securities	The following table shows the significant valuation assumption ranges for Level 3 available-for-sale investment securities at December 31, 2014:
			Minimum			Maximum			Average
	Residential Prime Non-Agency Mortgage-Backed Securities(a)
	Estimated lifetime prepayment rates			6	%		22	%		14	%
	Lifetime probability of default rates			–			7			4
	Lifetime loss severity rates			15			60			34
	Discount margin			2			5			3
	Residential Non-Prime Non-Agency Mortgage-Backed Securities(b)
	Estimated lifetime prepayment rates			3	%		10	%		7	%
	Lifetime probability of default rates			4			14			7
	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 December 31, 2014:
			Minimum			Maximum			Average
	Expected prepayment			11	%		21	%		12	%
	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 December 31, 2014:
			Minimum			Maximum			Average
	Expected loan close rate			38	%		100	%		76	%
	Inherent MSR value (basis points per loan)			45			203			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
	December 31, 2014
	Available-for-sale securities
	U.S. Treasury and agencies		$	1,351		$	1,281		$	–		$	–		$	2,632
	Mortgage-backed securities
	Residential
	Agency			–			45,017			–			–			45,017
	Non-agency
	Prime(a)			–			–			405			–			405
	Non-prime(b)			–			–			280			–			280
	Commercial
	Agency			–			115			–			–			115
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			–			22			–			–			22
	Other			–			557			62			–			619
	Obligations of state and political subdivisions			–			5,868			–			–			5,868
	Obligations of foreign governments			–			6			–			–			6
	Corporate debt securities			101			504			9			–			614
	Perpetual preferred securities			55			162			–			–			217
	Other investments			251			23			–			–			274
	Total available-for-sale			1,758			53,555			756			–			56,069
	Mortgage loans held for sale			–			4,774			–			–			4,774
	Mortgage servicing rights			–			–			2,338			–			2,338
	Derivative assets			–			1,408			660			(870	)		1,198
	Other assets			231			641			–			–			872
	Total		$	1,989		$	60,378		$	3,754		$	(870	)	$	65,251
	Derivative liabilities		$	–		$	2,103		$	86		$	(1,317	)	$	872
	Short-term borrowings(c)			101			608			–			–			709
	Total		$	101		$	2,711		$	86		$	(1,317	)	$	1,581
	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 years ended December 31:
	(Dollars in Millions)		Beginning			Net Gains			Net			Purchases			Sales			Principal			Issuances			Settlements			End of		Net Change
			of Period			(Losses)			Gains									Payments									Period		in Unrealized
			Balance			Included in			(Losses)																		Balance		Gains
						Net			Included																				(Losses)
						Income			in Other																				Relating to
									Compre-																				Assets and
									hensive																				Liabilities
									Income																				Still Held at
									(Loss)																				End of
																													Period
	2014
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime(a)		$	478		$	–		$	15		$	–		$	–		$	(88	)	$	–		$	–		$	405	$	14
	Non-prime(b)			297			(6	)		19			–			–			(30	)		–			–			280		19
	Asset-backed securities
	Other			63			4			–			5			–			(10	)		–			–			62		–
	Corporate debt securities			9			–			–			–			–			–			–			–			9		–
	Total available-for-sale			847			(2	)(c)		34	(f)		5			–			(128	)		–			–			756		33
	Mortgage servicing rights			2,680			(588	)(d)		–			5			(141	)		–			382	(g)		–			2,338		(588	)(d)
	Net derivative assets and liabilities			445			904	(e)		–			1			(4	)		–			–			(772	)		574		188	(h)
	2013
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime(a)		$	624		$	(6	)	$	8		$	–		$	–		$	(148	)	$	–		$	–		$	478	$	9
	Non-prime(b)			355			(13	)		17			–			(20	)		(42	)		–			–			297		17
	Asset-backed securities
	Other			15			3			1			51			–			(7	)		–			–			63		–
	Corporate debt securities			9			–			–			–			–			–			–			–			9		–
	Total available-for-sale			1,003			(16	)(i)		26	(f)		51			(20	)		(197	)		–			–			847		26
	Mortgage servicing rights			1,700			203	(d)		–			8			–			–			769	(g)		–			2,680		203	(d)
	Net derivative assets and liabilities			1,179			(18	)(j)		–			1			(5	)		–			–			(712	)		445		(321	)(k)
	2012
	Available-for-sale securities
	Mortgage-backed securities
	Residential non-agency
	Prime(a)		$	803		$	(10	)	$	91		$	–		$	(109	)	$	(151	)	$	–		$	–		$	624	$	65
	Non-prime(b)			802			(24	)		228			–			(562	)		(89	)		–			–			355		80
	Commercial non-agency			42			1			–			–			(38	)		(5	)		–			–			–		–
	Asset-backed securities
	Collateralized debt obligations/Collateralized loan obligations			120			13			(8	)		–			(104	)		(21	)		–			–			–		–
	Other			117			7			–			3			(93	)		(19	)		–			–			15		2
	Corporate debt securities			9			–			–			–			–			–			–			–			9		–
	Total available-for-sale			1,893			(13	)(l)		311	(f)		3			(906	)		(285	)		–			–			1,003		147
	Mortgage servicing rights			1,519			(818	)(d)		–			42			–			–			957	(g)		–			1,700		(818	)(d)
	Net derivative assets and liabilities			1,228			2,398	(m)		–			3			(5	)		–			–			(2,445	)		1,179		150	(n)
	(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)	Approximately $(3) million included in securities gains (losses) and $1 million included in interest income.
	(d)	Included in mortgage banking revenue.
	(e)	Approximately $404 million included in other noninterest income and $500 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 $128 million included in other noninterest income and $60 million included in mortgage banking revenue.
	(i)	Approximately $(14) million included in securities gains (losses) and $(2) million included in interest income.
	(j)	Approximately $(149) million included in other noninterest income and $131 million included in mortgage banking revenue.
	(k)	Approximately $(340) million included in other noninterest income and $19 million included in mortgage banking revenue.
	(l)	Approximately $(47) million included in securities gains (losses) and $34 million included in interest income.
	(m)	Approximately $359 million included in other noninterest income and $2.0 billion included in mortgage banking revenue.
	(n)	Approximately $(109) million included in other noninterest income and $259 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 as of December 31:
			2014												2013
	(Dollars in Millions)		Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3			Total
	Loans(a)		$	–		$	–		$	77		$	77		$	–		$	–		$	128		$	128
	Other assets(b)			–			–			90			90			–			–			150			150
	(a)	Represents the carrying value of loans for which adjustments were based on the fair value of the collateral, excluding loans fully charged-off.
	(b)	Primarily represents the fair value of foreclosed properties that were measured at fair value based on an appraisal or broker price opinion of the collateral subsequent to their initial acquisition.
Losses Recognized Related to Nonrecurring Fair Value Measurements of Individual Assets or Portfolios	The following table summarizes losses recognized related to nonrecurring fair value measurements of individual assets or portfolios for the years ended December 31:
	(Dollars in Millions)		2014			2013			2012
	Loans(a)		$	108		$	83		$	68
	Other assets(b)			70			96			160
	(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 as of December 31:
			2014									2013
	(Dollars in Millions)		Fair Value			Aggregate			Carrying			Fair Value			Aggregate			Carrying
			Carrying			Unpaid			Amount Over			Carrying			Unpaid			Amount Over
			Amount			Principal			(Under) Unpaid			Amount			Principal			(Under) Unpaid
									Principal									Principal
	Total loans		$	4,774		$	4,582		$	192		$	3,263		$	3,195		$	68
	Nonaccrual loans			6			9			(3	)		9			14			(5	)
	Loans 90 days or more past due			1			1			–			–			–			–
Estimated Fair Values of Financial Instruments	The estimated fair values of the Company’s financial instruments as of December 31, are shown in the table below:
			2014															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		$	10,654		$	10,654		$	–		$	–		$	10,654		$	8,477		$	8,477		$	–		$	–	$	8,477
	Federal funds sold and securities purchased under resale agreements			118			–			118			–			118			163			–			163			–		163
	Investment securities held-to-maturity			44,974			1,928			43,124			88			45,140			38,920			2,589			35,678			101		38,368
	Loans held for sale(a)			18			–			–			18			18			5			–			–			5		5
	Loans(b)			243,735			–			–			245,424			245,424			230,857			–			–			231,480		231,480
	Other financial instruments			2,187			–			924			1,269			2,193			2,443			–			1,080			1,383		2,463
	Financial Liabilities
	Deposits			282,733			–			282,708			–			282,708			262,123			–			262,200			–		262,200
	Short-term borrowings(c)			29,184			–			28,973			–			28,973			26,945			–			26,863			–		26,863
	Long-term debt			32,260			–			32,659			–			32,659			20,049			–			20,391			–		20,391
	Other liabilities			1,231			–			–			1,231			1,231			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)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Contract or Notional Amounts of Unfunded Commitments to Extend Credit	The contract or notional amounts of unfunded commitments to extend credit at December 31, 2014, excluding those commitments considered derivatives, were as follows:
			Term
	(Dollars in Millions)		Less Than			Greater Than			Total
			One Year			One Year
	Commercial and commercial real estate		$	24,161		$	89,108		$	113,269
	Corporate and purchasing cards(a)			21,301			–			21,301
	Residential mortgages			70			14			84
	Retail credit cards(a)			78,578			190			78,768
	Other retail			12,217			19,276			31,493
	Covered			–			667			667
	Federal funds			5,258			–			5,258
	(a)	Primarily cancelable at the Company’s discretion.
Future Minimum Payments Under Capital Leases and Noncancelable Operating Leases	Future minimum payments, net of sublease rentals, under capitalized leases and noncancelable operating leases with initial or remaining terms of one year or more, consisted of the following at December 31, 2014:
	(Dollars in Millions)		Capitalized			Operating
			Leases			Leases
	2015		$	13		$	265
	2016			12			238
	2017			10			206
	2018			10			166
	2019			8			134
	Thereafter			34			503
	Total minimum lease payments			87		$	1,512
	Less amount representing interest			31
	Present value of net minimum lease payments		$	56
Summary of Other Guarantees and Contingent Liabilities	The following table is a summary of other guarantees and contingent liabilities of the Company at December 31, 2014:
	(Dollars in Millions)		Collateral			Carrying			Maximum
			Held			Amount			Potential
									Future
									Payments
	Standby letters of credit		$	–		$	58		$	14,838
	Third party borrowing arrangements			–			–			10
	Securities lending indemnifications			4,649			–			4,514
	Asset sales			–			145			4,271
	Merchant processing			522			58			89,652
	Contingent consideration arrangements			–			2			2
	Tender option bond program guarantee			2,870			–			2,719
	Minimum revenue guarantees			–			6			6
	Other			–			–			502
Contract or Notional Amount of Letters of Credit	The contract or notional amount of letters of credit at December 31, 2014, were as follows:
			Term
	(Dollars in Millions)		Less Than			Greater			Total
			One Year			Than
						One Year
	Standby		$	6,757		$	8,081		$	14,838
	Commercial			354			53			407
Representation and Warranty Reserve Rollforward	The following table is a rollforward of the Company’s representation and warranty reserve:
	Year Ended December 31		2014			2013			2012
	(Dollars in Millions)
	Balance at beginning of period		$	83		$	240		$	160
	Net realized losses			(28	)		(115	)		(120	)
	Change in reserve			(9	)		(42	)		200
	Balance at end of period		$	46		$	83		$	240

US_Bancorp_Parent_Company_Tabl

U.S. Bancorp (Parent Company) (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Statement of Financial Position of Parent Company Only	CONDENSED BALANCE SHEET
	At December 31 (Dollars in Millions)	2014			2013
	Assets
	Due from banks, principally interest-bearing	$	10,775		$	8,371
	Available-for-sale securities		464			463
	Investments in bank subsidiaries		39,599			37,558
	Investments in nonbank subsidiaries		1,906			1,546
	Advances to bank subsidiaries		2,650			2,250
	Advances to nonbank subsidiaries		550			1,534
	Other assets		1,762			1,628
	Total assets	$	57,706		$	53,350
	Liabilities and Shareholders’ Equity
	Short-term funds borrowed	$	177		$	138
	Long-term debt		13,189			11,416
	Other liabilities		861			683
	Shareholders’ equity		43,479			41,113
	Total liabilities and shareholders’ equity	$	57,706		$	53,350
Condensed Income Statement of Parent Company Only	CONDENSED STATEMENT OF INCOME
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Income
	Dividends from bank subsidiaries	$	3,850		$	6,100		$	250
	Dividends from nonbank subsidiaries		38			9			4
	Interest from subsidiaries		123			118			96
	Other income		64			66			149
	Total income		4,075			6,293			499
	Expense
	Interest expense		335			325			393
	Other expense		90			81			122
	Total expense		425			406			515
	Income (loss) before income taxes and equity in undistributed income of subsidiaries		3,650			5,887			(16	)
	Applicable income taxes		(94	)		(88	)		(85	)
	Income of parent company		3,744			5,975			69
	Equity in undistributed income (losses) of subsidiaries		2,107			(139	)		5,578
	Net income attributable to U.S. Bancorp	$	5,851		$	5,836		$	5,647
Condensed Statement of Cash Flows of Parent Company Only	CONDENSED STATEMENT OF CASH FLOWS
	Year Ended December 31 (Dollars in Millions)	2014			2013			2012
	Operating Activities
	Net income attributable to U.S. Bancorp	$	5,851		$	5,836		$	5,647
	Adjustments to reconcile net income to net cash provided by operating activities
	Equity in undistributed (income) losses of subsidiaries		(2,107	)		139			(5,578	)
	Other, net		48			(40	)		(35	)
	Net cash provided by operating activities		3,792			5,935			34
	Investing Activities
	Proceeds from sales and maturities of investment securities		46			75			979
	Purchases of investment securities		(39	)		(118	)		(35	)
	Equity distributions from subsidiaries		–			12			845
	Net decrease in short-term advances to subsidiaries		984			4,543			207
	Long-term advances to subsidiaries		(1,800	)		(750	)		(500	)
	Principal collected on long-term advances to subsidiaries		1,400			–			–
	Other, net		(52	)		(9	)		(22	)
	Net cash provided by investing activities		539			3,753			1,474
	Financing Activities
	Net increase in short-term borrowings		39			4			105
	Proceeds from issuance of long-term debt		3,250			1,500			3,550
	Principal payments or redemption of long-term debt		(1,500	)		(2,850	)		(5,412	)
	Proceeds from issuance of preferred stock		–			487			2,163
	Proceeds from issuance of common stock		453			524			395
	Redemption of preferred stock		–			(500	)		–
	Repurchase of common stock		(2,200	)		(2,282	)		(1,856	)
	Cash dividends paid on preferred stock		(243	)		(254	)		(204	)
	Cash dividends paid on common stock		(1,726	)		(1,576	)		(1,347	)
	Net cash used in financing activities		(1,927	)		(4,947	)		(2,606	)
	Change in cash and due from banks		2,404			4,741			(1,098	)
	Cash and due from banks at beginning of year		8,371			3,630			4,728
	Cash and due from banks at end of year	$	10,775		$	8,371		$	3,630

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses - Commercial Loans by Industry Group and Geography Excluding Covered Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Loans by Industry Group and Geography [Line Items]
Commercial	$80,377	$70,033
Commercial, percentage	100.00%	100.00%
California [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	9,961	8,748
Commercial, percentage	12.40%	12.50%
Colorado [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	3,528	2,970
Commercial, percentage	4.40%	4.20%
Illinois [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	4,108	3,539
Commercial, percentage	5.10%	5.10%
Minnesota [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	6,316	5,086
Commercial, percentage	7.90%	7.30%
Missouri [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,832	2,893
Commercial, percentage	3.50%	4.10%
Ohio [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	3,534	3,385
Commercial, percentage	4.40%	4.80%
Oregon [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,130	1,941
Commercial, percentage	2.60%	2.80%
Washington [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	3,237	2,823
Commercial, percentage	4.00%	4.00%
Wisconsin [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	3,090	2,768
Commercial, percentage	3.80%	4.00%
Iowa, Kansas, Nebraska, North Dakota, South Dakota [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	4,400	4,091
Commercial, percentage	5.50%	5.80%
Arkansas, Indiana, Kentucky, Tennessee [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	4,949	4,024
Commercial, percentage	6.20%	5.80%
Idaho, Montana, Wyoming [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	1,475	1,148
Commercial, percentage	1.80%	1.60%
Arizona, Nevada, New Mexico, Utah [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,951	2,917
Commercial, percentage	3.70%	4.20%
Total Banking Region [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	52,511	46,333
Commercial, percentage	65.30%	66.20%
Florida, Michigan, New York, Pennsylvania, Texas [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	14,036	11,762
Commercial, percentage	17.50%	16.80%
All Other States [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	13,830	11,938
Commercial, percentage	17.20%	17.00%
Total Outside Company's Banking Region [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	27,866	23,700
Commercial, percentage	34.70%	33.80%
Manufacturing [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	12,261	10,738
Commercial, percentage	15.30%	15.30%
Finance and Insurance [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	7,799	5,864
Commercial, percentage	9.70%	8.40%
Real Estate, Rental and Leasing [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	7,779	6,788
Commercial, percentage	9.70%	9.70%
Wholesale Trade [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	7,350	6,346
Commercial, percentage	9.10%	9.10%
Retail Trade [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	6,428	5,401
Commercial, percentage	8.00%	7.70%
Health Care and Social Assistance [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	5,280	5,048
Commercial, percentage	6.60%	7.20%
Public Administration [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	4,033	3,934
Commercial, percentage	5.00%	5.60%
Professional Scientific and Technical Services [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	3,121	2,747
Commercial, percentage	3.90%	3.90%
Transport and Storage [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,941	2,322
Commercial, percentage	3.70%	3.30%
Information [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,702	2,443
Commercial, percentage	3.40%	3.50%
Mining [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,604	2,094
Commercial, percentage	3.20%	3.00%
Arts Entertainment and Recreation [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,493	2,214
Commercial, percentage	3.10%	3.20%
Educational Services [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	2,286	2,222
Commercial, percentage	2.80%	3.20%
Agriculture Forestry Fishing and Hunting [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	1,642	1,508
Commercial, percentage	2.00%	2.10%
Other Services [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	1,449	1,507
Commercial, percentage	1.80%	2.10%
Utilities [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	1,404	1,374
Commercial, percentage	1.70%	2.00%
Other [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$8,805	$7,483
Commercial, percentage	11.00%	10.70%

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses - Commercial Real Estate Loans by Property Type and Geography Excluding Covered Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Loans by Property Type and Geography [Line Items]
Commercial real estate	$42,795	$39,885
Commercial real estate, percentage	100.00%	100.00%
California [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	10,545	9,148
Commercial real estate, percentage	24.60%	22.90%
Colorado [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,955	1,781
Commercial real estate, percentage	4.60%	4.50%
Illinois [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	2,153	1,586
Commercial real estate, percentage	5.00%	4.00%
Minnesota [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	2,031	2,052
Commercial real estate, percentage	4.70%	5.20%
Missouri [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,453	1,573
Commercial real estate, percentage	3.40%	3.90%
Ohio [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,391	1,491
Commercial real estate, percentage	3.30%	3.70%
Oregon [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	2,012	1,999
Commercial real estate, percentage	4.70%	5.00%
Washington [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	3,501	3,548
Commercial real estate, percentage	8.20%	8.90%
Wisconsin [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	2,293	2,410
Commercial real estate, percentage	5.40%	6.00%
Iowa, Kansas, Nebraska, North Dakota, South Dakota [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	2,202	2,237
Commercial real estate, percentage	5.10%	5.60%
Arkansas, Indiana, Kentucky, Tennessee [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,764	1,718
Commercial real estate, percentage	4.10%	4.30%
Idaho, Montana, Wyoming [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,319	1,265
Commercial real estate, percentage	3.10%	3.20%
Arizona, Nevada, New Mexico, Utah [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	3,383	3,214
Commercial real estate, percentage	7.90%	8.10%
Total Banking Region [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	36,002	34,022
Commercial real estate, percentage	84.10%	85.30%
Florida, Michigan, New York, Pennsylvania, Texas [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	3,656	3,178
Commercial real estate, percentage	8.60%	8.00%
All Other States [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	3,137	2,685
Commercial real estate, percentage	7.30%	6.70%
Total Outside Company's Banking Region [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	6,793	5,863
Commercial real estate, percentage	15.90%	14.70%
Business Owner Occupied [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	11,535	11,223
Commercial real estate, percentage	26.90%	28.10%
Industrial Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,582	1,567
Commercial real estate, percentage	3.70%	3.90%
Office Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	5,680	5,173
Commercial real estate, percentage	13.30%	13.00%
Retail Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	4,896	4,503
Commercial real estate, percentage	11.40%	11.30%
Other Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	4,670	4,253
Commercial real estate, percentage	10.90%	10.70%
Multi-Family [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	8,548	7,886
Commercial real estate, percentage	20.00%	19.80%
Hotel/Motel [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	3,624	3,251
Commercial real estate, percentage	8.50%	8.10%
Residential Homebuilders [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	1,996	1,728
Commercial real estate, percentage	4.70%	4.30%
Health Care Facilities [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$264	$301
Commercial real estate, percentage	0.60%	0.80%

Investment_Securities_Investme

Investment Securities - Investment Securities (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, total, amortized cost	$55,432		$41,059
Available-for-sale securities, total, fair value	56,069	[1]	40,935	[1]
Available-for-sale securities, total, weighted average yield	2.32%		2.64%
Available-for-sale securities, total, weighted average maturity in years	4 years 3 months 18 days		6 years
Held-to-maturity securities, total, weighted average yield	1.92%		2.00%
Held-to-maturity securities, total, amortized cost	44,974	[1]	38,920	[1]
Amortized Cost of Investment Securities	100,406		79,979
Amortized Cost of Investment Securities, Percentage	100.00%		100.00%
Held-to-maturity securities, total, fair value	45,140		38,368
Held-to-maturity securities, total, weighted average maturity in years	4 years		4 years 6 months
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	121
Available-for-sale securities, maturing after one year through five years, amortized cost	1,886
Available-for-sale securities, maturing after five years through ten years, amortized cost	514
Available-for-sale securities, maturing after ten years, amortized cost	101
Available-for-sale securities, total, amortized cost	2,622		1,108
Available-for-sale securities, maturing in one year or less, fair value	122
Available-for-sale securities, maturing after one year through five years, fair value	1,890
Available-for-sale securities, maturing after five years through ten years, fair value	519
Available-for-sale securities, maturing after ten years, fair value	101
Available-for-sale securities, total, fair value	2,632		1,045
Available-for-sale securities, maturing in one year or less, weighted average yield	3.27%
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	1 month 6 days
Available for sale securities, maturing after one year through five years, weighted average yield	1.73%
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	3 years 3 months 18 days
Available-for-sale securities, maturing after five years through ten years, weighted average yield	2.90%
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	7 years 6 months
Available-for-sale securities, maturing after ten years, weighted average yield	1.39%
Available-for-sale securities, maturing after ten years, weighted average maturity in years	18 years 3 months 18 days
Available-for-sale securities, total, weighted average yield	2.02%
Available-for-sale securities, total, weighted average maturity in years	4 years 7 months 5 days
Held-to-maturity securities, maturing in one year or less, weighted average yield	1.36%
Held-to-maturity securities, maturing in one year or less, amortized cost	80
Held-to-maturity securities, maturing after one year through five years, weighted average yield	1.42%
Held-to-maturity securities, maturing after one year through five years, amortized cost	1,097
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	2.21%
Held-to-maturity securities, maturing after five years through ten years, amortized cost	1,483
Held-to-maturity securities, maturing after ten years, weighted average yield	1.74%
Held-to-maturity securities, maturing after ten years, amortized cost	57
Held-to-maturity securities, total, weighted average yield	1.86%
Held-to-maturity securities, total, amortized cost	2,717		3,114
Held-to-maturity securities, maturing in one year or less, fair value	81
Amortized Cost of Investment Securities	5,339		4,222
Held to maturity securities, maturing after one year through five years, fair value	1,101
Amortized Cost of Investment Securities, Percentage	5.30%		5.30%
Held-to-maturity securities, maturing after five years through ten years, fair value	1,475
Held-to-maturity securities, maturing after ten years, fair value	57
Held-to-maturity securities, total, fair value	2,714		3,040
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	3 years 8 months 12 days
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	7 years 7 months 6 days
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	10 years 7 months 6 days
Held-to-maturity securities, total, weighted average maturity in years	5 years 10 months 24 days
Mortgage-Backed Securities [Member]
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, maturing in one year or less, amortized cost	970
Available-for-sale securities, maturing after one year through five years, amortized cost	36,671
Available-for-sale securities, maturing after five years through ten years, amortized cost	7,104
Available-for-sale securities, maturing after ten years, amortized cost	695
Available-for-sale securities, total, amortized cost	45,440
Available-for-sale securities, maturing in one year or less, fair value	973
Available-for-sale securities, maturing after one year through five years, fair value	36,984
Available-for-sale securities, maturing after five years through ten years, fair value	7,162
Available-for-sale securities, maturing after ten years, fair value	698
Available-for-sale securities, total, fair value	45,817
Available-for-sale securities, maturing in one year or less, weighted average yield	1.39%
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 yield	1.87%
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	3 years 10 months 24 days
Available-for-sale securities, maturing after five years through ten years, weighted average yield	1.73%
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	5 years 10 months 24 days
Available-for-sale securities, maturing after ten years, weighted average yield	1.24%
Available-for-sale securities, maturing after ten years, weighted average maturity in years	11 years 10 months 24 days
Available-for-sale securities, total, weighted average yield	1.83%
Available-for-sale securities, total, weighted average maturity in years	4 years 2 months 12 days
Held-to-maturity securities, maturing in one year or less, weighted average yield	1.29%
Held-to-maturity securities, maturing in one year or less, amortized cost	320
Held-to-maturity securities, maturing after one year through five years, weighted average yield	2.00%
Held-to-maturity securities, maturing after one year through five years, amortized cost	37,598
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	1.31%
Held-to-maturity securities, maturing after five years through ten years, amortized cost	4,079
Held-to-maturity securities, maturing after ten years, weighted average yield	1.13%
Held-to-maturity securities, maturing after ten years, amortized cost	208
Held-to-maturity securities, total, weighted average yield	1.93%
Held-to-maturity securities, total, amortized cost	42,205
Held-to-maturity securities, maturing in one year or less, fair value	320
Amortized Cost of Investment Securities	87,645		68,236
Held to maturity securities, maturing after one year through five years, fair value	37,737
Amortized Cost of Investment Securities, Percentage	87.30%		85.30%
Held-to-maturity securities, maturing after five years through ten years, fair value	4,100
Held-to-maturity securities, maturing after ten years, fair value	207
Held-to-maturity securities, total, fair value	42,364
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 8 months 12 days
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	5 years 9 months 18 days
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	11 years 6 months
Held-to-maturity securities, total, weighted average maturity in years	3 years 10 months 24 days
Asset-Backed Securities [Member]
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, maturing after one year through five years, amortized cost	269
Available-for-sale securities, maturing after five years through ten years, amortized cost	356
Available-for-sale securities, total, amortized cost	625
Available-for-sale securities, maturing after one year through five years, fair value	278
Available-for-sale securities, maturing after five years through ten years, fair value	363
Available-for-sale securities, total, fair value	641
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	0 years
Available for sale securities, maturing after one year through five years, weighted average yield	1.82%
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	3 years 3 months 18 days
Available-for-sale securities, maturing after five years through ten years, weighted average yield	1.94%
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	6 years 9 months 18 days
Available-for-sale securities, maturing after ten years, weighted average maturity in years	0 years
Available-for-sale securities, total, weighted average yield	1.89%
Available-for-sale securities, total, weighted average maturity in years	5 years 3 months 18 days
Held-to-maturity securities, maturing in one year or less, weighted average yield	0.79%
Held-to-maturity securities, maturing after one year through five years, weighted average yield	0.88%
Held-to-maturity securities, maturing after one year through five years, amortized cost	7
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	0.83%
Held-to-maturity securities, maturing after five years through ten years, amortized cost	6
Held-to-maturity securities, maturing after ten years, weighted average yield	0.90%
Held-to-maturity securities, total, weighted average yield	0.85%
Held-to-maturity securities, total, amortized cost	13
Held-to-maturity securities, maturing in one year or less, fair value	1
Amortized Cost of Investment Securities	638		652
Held to maturity securities, maturing after one year through five years, fair value	10
Amortized Cost of Investment Securities, Percentage	0.60%		0.80%
Held-to-maturity securities, maturing after five years through ten years, fair value	6
Held-to-maturity securities, maturing after ten years, fair value	7
Held-to-maturity securities, total, fair value	24
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	6 months
Held-to-maturity securities, maturing after one year through five years, weighted average maturity in years	2 years 4 months 24 days
Held-to-maturity securities, maturing after five years through ten years, weighted average maturity in years	6 years 4 months 24 days
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	15 years 3 months 18 days
Held-to-maturity securities, total, weighted average maturity in years	4 years 3 months 18 days
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	904
Available-for-sale securities, maturing after one year through five years, amortized cost	4,087
Available-for-sale securities, maturing after five years through ten years, amortized cost	519
Available-for-sale securities, maturing after ten years, amortized cost	94
Available-for-sale securities, total, amortized cost	5,604		5,673
Available-for-sale securities, maturing in one year or less, fair value	920
Available-for-sale securities, maturing after one year through five years, fair value	4,317
Available-for-sale securities, maturing after five years through ten years, fair value	528
Available-for-sale securities, maturing after ten years, fair value	103
Available-for-sale securities, total, fair value	5,868		5,738
Available-for-sale securities, maturing in one year or less, weighted average yield	6.62%
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	6 months
Available for sale securities, maturing after one year through five years, weighted average yield	6.72%
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	2 years 1 month 6 days
Available-for-sale securities, maturing after five years through ten years, weighted average yield	4.54%
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 yield	7.37%
Available-for-sale securities, maturing after ten years, weighted average maturity in years	14 years 4 months 24 days
Available-for-sale securities, total, weighted average yield	6.51%
Available-for-sale securities, total, weighted average maturity in years	2 years 6 months
Held-to-maturity securities, maturing in one year or less, weighted average yield	10.19%
Held-to-maturity securities, maturing in one year or less, amortized cost	1
Held-to-maturity securities, maturing after one year through five years, weighted average yield	8.35%
Held-to-maturity securities, maturing after one year through five years, amortized cost	1
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	8.05%
Held-to-maturity securities, maturing after five years through ten years, amortized cost	1
Held-to-maturity securities, maturing after ten years, weighted average yield	2.51%
Held-to-maturity securities, maturing after ten years, amortized cost	6
Held-to-maturity securities, total, weighted average yield	4.37%
Held-to-maturity securities, total, amortized cost	9		12
Held-to-maturity securities, maturing in one year or less, fair value	1
Amortized Cost of Investment Securities	5,613		5,685
Held to maturity securities, maturing after one year through five years, fair value	1
Amortized Cost of Investment Securities, Percentage	5.60%		7.10%
Held-to-maturity securities, maturing after five years through ten years, fair value	1
Held-to-maturity securities, maturing after ten years, fair value	6
Held-to-maturity securities, total, fair value	9		12
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	6 months
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	7 years 2 months 12 days
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	11 years 2 months 12 days
Held-to-maturity securities, total, weighted average maturity in years	9 years
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 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 ten years, fair value	614
Available-for-sale securities, total, fair value	620
Available-for-sale securities, maturing in one year or less, weighted average yield	1.01%
Available-for-sale securities, maturing in one year or less, weighted average maturity in years	2 months 12 days
Available-for-sale securities, maturing after one year through five years, weighted average maturity in years	0 years
Available-for-sale securities, maturing after five years through ten years, weighted average maturity in years	0 years
Available-for-sale securities, maturing after ten years, weighted average yield	2.47%
Available-for-sale securities, maturing after ten years, weighted average maturity in years	18 years 6 months
Available-for-sale securities, total, weighted average yield	2.45%
Available-for-sale securities, total, weighted average maturity in years	18 years 3 months 18 days
Held-to-maturity securities, maturing after one year through five years, weighted average yield	1.44%
Held-to-maturity securities, maturing after one year through five years, amortized cost	9
Held-to-maturity securities, maturing after five years through ten years, weighted average yield	0.97%
Held-to-maturity securities, maturing after five years through ten years, amortized cost	21
Held-to-maturity securities, total, weighted average yield	1.11%
Held-to-maturity securities, total, amortized cost	30
Amortized Cost of Investment Securities	1,171		1,184
Held to maturity securities, maturing after one year through five years, fair value	9
Amortized Cost of Investment Securities, Percentage	1.20%		1.50%
Held-to-maturity securities, maturing after five years through ten years, fair value	20
Held-to-maturity securities, total, fair value	29
Held-to-maturity securities, maturing in one year or less, weighted average maturity in years	0 years
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	5 years 9 months 18 days
Held-to-maturity securities, maturing after ten years, weighted average maturity in years	0 years
Held-to-maturity securities, total, weighted average maturity in years	4 years 9 months 18 days
Other Investments Including Perpetual Preferred Securities [Member]
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, total, amortized cost	445
Available-for-sale securities, total, fair value	$491
Available-for-sale securities, total, weighted average yield	2.21%
Available-for-sale securities, total, weighted average maturity in years	13 years 7 months 6 days
Held-to-maturity securities, total, weighted average maturity in years	0 years
[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)	12 Months Ended
	Dec. 31, 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 3 months 18 days	6 years
Weighted-average yield of available-for-sale investment securities	2.32%	2.64%
Weighted average maturity of held-to-maturity investment securities	4 years	4 years 6 months
Weighted-average yield of held-to-maturity investment securities	1.92%	2.00%

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses - Summary of Nonperforming Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Millions, unless otherwise specified
Nonperforming Assets [Line Items]
Total commercial	$80,377	$70,033
Total commercial real estate	42,795	39,885
Residential mortgages	51,619	51,156
Credit card	18,515	18,021
Total other retail	49,264	47,678
Total nonperforming loans, excluding covered loans	242,570	226,773
Covered loans	5,281	8,462
Total nonperforming loans	247,851	235,235
Covered Other Real Estate	1,212	1,697
Total nonperforming assets	1,808	2,037
Accruing loans 90 days or more past due	945	1,189
Nonperforming Assets [Member]
Nonperforming Assets [Line Items]
Commercial	99	122	107	280	519
Lease financing	13	12	16	32	78
Total commercial	112	134	123	312	597
Commercial mortgages	175	182	308	354	545
Construction and development	84	121	238	545	748
Total commercial real estate	259	303	546	899	1,293
Residential mortgages	864	770	661	650	636
Credit card	30	78	146	224	228
Retail leasing	1	1	1
Other	186	190	216	67	65
Total other retail	187	191	217	67	65
Total nonperforming loans, excluding covered loans	1,452	1,476	1,693	2,152	2,819
Covered loans	14	127	386	926	1,244
Total nonperforming loans	1,466	1,603	2,079	3,078	4,063
Other Real Estate	288	327	381	404	511
Covered Other Real Estate	37	97	197	274	453
Other Assets	17	10	14	18	21
Total nonperforming assets	1,808	2,037	2,671	3,774	5,048
Total nonperforming assets, excluding covered assets	1,757	1,813	2,088	2,574	3,351
Nonperforming Assets Excluding Covered Assets [Member] | Nonperforming Assets [Member]
Nonperforming Assets [Line Items]
Accruing loans 90 days or more past due	550	713	660	843	1,094
Nonperforming loans to total loans	0.60%	0.65%	0.80%	1.10%	1.57%
Nonperforming assets to total loans plus other real estate	0.72%	0.80%	0.98%	1.32%	1.87%
Nonperforming Assets Including Covered Assets [Member] | Nonperforming Assets [Member]
Nonperforming Assets [Line Items]
Accruing loans 90 days or more past due	$945	$1,189	$1,323	$1,753	$2,184
Nonperforming loans to total loans	0.59%	0.68%	0.93%	1.47%	2.06%
Nonperforming assets to total loans plus other real estate	0.73%	0.86%	1.19%	1.79%	2.55%

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses - Summary of Change in Nonperforming Assets (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Nonperforming Assets [Line Items]
Balance December 31, 2013	$2,037
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	1,260
Advances on loans	52
Total additions	1,312
Reductions in nonperforming assets
Paydowns, payoffs	-663
Net sales	-319
Return to performing status	-153
Charge-offs	-406
Total reductions	-1,541
Net additions to (reductions in) nonperforming assets	-229
Balance December 31, 2014	1,808
Commercial And Commercial Real Estate Loans [Member]
Nonperforming Assets [Line Items]
Balance December 31, 2013	494
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	514
Advances on loans	52
Total additions	566
Reductions in nonperforming assets
Paydowns, payoffs	-248
Net sales	-120
Return to performing status	-21
Charge-offs	-240
Total reductions	-629
Net additions to (reductions in) nonperforming assets	-63
Balance December 31, 2014	431
Credit Card Other Retail and Residential Mortgages [Member]
Nonperforming Assets [Line Items]
Balance December 31, 2013	1,319
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	672
Total additions	672
Reductions in nonperforming assets
Paydowns, payoffs	-244
Net sales	-127
Return to performing status	-130
Charge-offs	-164
Total reductions	-665
Net additions to (reductions in) nonperforming assets	7
Balance December 31, 2014	1,326
Covered Assets [Member]
Nonperforming Assets [Line Items]
Balance December 31, 2013	224
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	74
Total additions	74
Reductions in nonperforming assets
Paydowns, payoffs	-171
Net sales	-72
Return to performing status	-2
Charge-offs	-2
Total reductions	-247
Net additions to (reductions in) nonperforming assets	-173
Balance December 31, 2014	$51

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses - Summary of Change in Nonperforming Assets (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Receivables [Abstract]
Period of accruing loans excluded from nonperforming assets and related ratios	90 days	90 days	90 days	90 days	90 days
GNMA loans that are 90 days past due and continue to accrue interest	$3,100,000,000	$3,700,000,000	$3,200,000,000	$2,600,000,000	$2,600,000,000
Foreclosed GNMA loans that continue to accrue interest and excluded from nonperforming assets	$641,000,000	$527,000,000	$548,000,000	$692,000,000	$575,000,000

Shareholders_Equity_Regulatory

Shareholders' Equity - Regulatory Capital Ratios (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital as a percent of risk-weighted assets - Minimum capital ratio requirement	4.00%
Tier 1 capital as a percent of risk-weighted assets - Minimum capital ratio requirement	5.50%	4.00%
Total risk-based capital as a percent of risk-weighted assets - Minimum capital ratio requirement	8.00%	8.00%
Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio) - Minimum capital ratio requirement	4.00%	4.00%
Common equity tier 1 capital as a percent of risk-weighted assets - Well capitalized ratio requirement	0.00%	0.00%
Tier 1 capital as a percent of risk-weighted assets - Well capitalized ratio requirement	6.00%	6.00%
Total risk-based capital as a percent of risk-weighted assets - Well capitalized ratio requirement	10.00%	10.00%
Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio) - Well capitalized ratio requirement	5.00%	5.00%
Basel III transitional standardized approach/Basel I: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital	36,020	33,386
Total risk-based capital	43,208	39,340
Risk-weighted assets	317,398	297,919
Basel III transitional advanced approaches: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital	36,020
Total risk-based capital	40,475
Risk-weighted assets	248,596
U.S. Bancorp [Member] | Basel III transitional standardized approach/Basel I: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	30,856
Tier 1 capital	36,020	33,386
Total risk-based capital	43,208	39,340
Risk-weighted assets	317,398	297,919
Common equity tier 1 capital as a percent of risk-weighted assets	9.70%
Tier 1 capital as a percent of risk-weighted assets	11.30%	11.20%
Total risk-based capital as a percent of risk-weighted assets	13.60%	13.20%
Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)	9.30%	9.60%
U.S. Bancorp [Member] | Basel III transitional advanced approaches: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	30,856
Tier 1 capital	36,020
Total risk-based capital	40,475
Risk-weighted assets	248,596
Common equity tier 1 capital as a percent of risk-weighted assets	12.40%
Tier 1 capital as a percent of risk-weighted assets	14.50%
Total risk-based capital as a percent of risk-weighted assets	16.30%
U.S. Bank National Association [Member] | Basel III transitional standardized approach/Basel I: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	32,381
Tier 1 capital	32,789	30,167
Total risk-based capital	40,008	36,392
Risk-weighted assets	313,261	293,335
Common equity tier 1 capital as a percent of risk-weighted assets	10.30%
Tier 1 capital as a percent of risk-weighted assets	10.50%	10.30%
Total risk-based capital as a percent of risk-weighted assets	12.80%	12.40%
Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)	8.60%	8.80%
U.S. Bank National Association [Member] | Basel III transitional advanced approaches: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	32,381
Tier 1 capital	32,789
Total risk-based capital	37,299
Risk-weighted assets	245,007
Common equity tier 1 capital as a percent of risk-weighted assets	13.20%
Tier 1 capital as a percent of risk-weighted assets	13.40%
Total risk-based capital as a percent of risk-weighted assets	15.20%

Significant_Accounting_Policie3

Significant Accounting Policies - Line of Business Financial Performance (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$10,997	$10,828
Net interest income (taxable-equivalent basis), Percent change	1.60%
Noninterest income	9,161	8,765
Noninterest income, Percent change	4.50%
Securities gains (losses), net	3	9	-15
Securities gains (losses), net, Percent change	-66.70%
Total net revenue	20,161	19,602
Total net revenue, Percent change	2.90%
Noninterest expense, Percent change	4.60%
Other intangibles, Percent change	-10.80%
Total noninterest expense, Percent change	4.30%
Income before provision and income taxes, Percent change	1.30%
Provision for credit losses, Percent change	-8.30%
Income before income taxes, Percent change	2.90%
Income taxes and taxable-equivalent adjustment, Percent change	2.30%
Net income, Percent change	3.10%
Net income attributable to U.S. Bancorp, Percent change	0.30%
Noninterest expense	10,516	10,051
Other intangibles	199	223	274
Total noninterest expense	10,715	10,274	10,456
Income before provision and income taxes	9,446	9,328
Provision for credit losses	1,229	1,340	1,882
Income before income taxes	8,217	7,988
Income taxes and taxable-equivalent adjustment	2,309	2,256
Net income	5,908	5,732	5,490
Net (income) loss attributable to noncontrolling interests	-57	104	157
Net income attributable to U.S. Bancorp	5,851	5,836	5,647
Average Balance Sheet
Commercial	75,734	67,274
Commercial, Percent change	12.60%
Commercial real estate	40,592	38,237
Commercial real estate, Percent change	6.20%
Residential mortgages	51,818	47,982
Residential mortgages, Percent change	8.00%
Credit card	17,635	16,813
Credit card, Percent change	4.90%
Other retail	48,353	47,125
Other retail, Percent change	2.60%
Total loans, excluding covered loans	234,132	217,431
Total loans, excluding covered loans, Percent change	7.70%
Covered loans	7,560	10,043
Covered loans, Percent change	-24.70%
Total loans	241,692	227,474
Total loans, Percent change	6.30%
Goodwill, Percent change	1.60%
Other intangible assets, Percent change	5.00%
Assets, Percent change	7.70%
Noninterest-bearing deposits, Percent change	6.40%
Interest checking, Percent change	9.10%
Savings products, Percent change	12.30%
Time deposits, Percent change	-7.60%
Total deposits, Percent change	6.50%
Total U.S. Bancorp shareholders' equity, Percent change	7.30%
Goodwill	9,312	9,164
Other intangible assets	3,338	3,178
Assets	380,004	352,680
Noninterest-bearing deposits	73,455	69,020
Interest checking	53,248	48,792
Savings products	98,173	87,428
Time deposits	41,764	45,217
Total deposits	266,640	250,457
Total U.S. Bancorp shareholders' equity	42,837	39,917
Wholesale Banking and Commercial Real Estate [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	2,061	2,011
Net interest income (taxable-equivalent basis), Percent change	2.50%
Noninterest income	976	1,092
Noninterest income, Percent change	-10.60%
Total net revenue	3,037	3,103
Total net revenue, Percent change	-2.10%
Noninterest expense, Percent change	1.60%
Other intangibles, Percent change	-50.00%
Total noninterest expense, Percent change	1.30%
Income before provision and income taxes, Percent change	-4.40%
Income before income taxes, Percent change	-10.90%
Income taxes and taxable-equivalent adjustment, Percent change	-11.00%
Net income, Percent change	-10.80%
Net income attributable to U.S. Bancorp, Percent change	-10.80%
Noninterest expense	1,238	1,218
Other intangibles	4	8
Total noninterest expense	1,242	1,226
Income before provision and income taxes	1,795	1,877
Provision for credit losses	43	-89
Income before income taxes	1,752	1,966
Income taxes and taxable-equivalent adjustment	637	716
Net income	1,115	1,250
Net income attributable to U.S. Bancorp	1,115	1,250
Average Balance Sheet
Commercial	57,989	50,774
Commercial, Percent change	14.20%
Commercial real estate	20,954	19,566
Commercial real estate, Percent change	7.10%
Residential mortgages	20	26
Residential mortgages, Percent change	-23.10%
Other retail	4	7
Other retail, Percent change	-42.90%
Total loans, excluding covered loans	78,967	70,373
Total loans, excluding covered loans, Percent change	12.20%
Covered loans	190	363
Covered loans, Percent change	-47.70%
Total loans	79,157	70,736
Total loans, Percent change	11.90%
Goodwill, Percent change	1.50%
Other intangible assets, Percent change	-16.00%
Assets, Percent change	11.90%
Noninterest-bearing deposits, Percent change	5.20%
Interest checking, Percent change	0.90%
Savings products, Percent change	32.30%
Time deposits, Percent change	-1.80%
Total deposits, Percent change	8.00%
Total U.S. Bancorp shareholders' equity, Percent change	6.30%
Goodwill	1,628	1,604
Other intangible assets	21	25
Assets	86,361	77,180
Noninterest-bearing deposits	32,642	31,037
Interest checking	10,599	10,507
Savings products	18,667	14,105
Time deposits	18,147	18,482
Total deposits	80,055	74,131
Total U.S. Bancorp shareholders' equity	7,743	7,287
Consumer and Small Business Banking [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	4,313	4,598
Net interest income (taxable-equivalent basis), Percent change	-6.20%
Noninterest income	2,602	2,892
Noninterest income, Percent change	-10.00%
Total net revenue	6,915	7,490
Total net revenue, Percent change	-7.70%
Noninterest expense, Percent change	2.00%
Total noninterest expense, Percent change	2.00%
Income before provision and income taxes, Percent change	-22.40%
Provision for credit losses, Percent change	-34.50%
Income before income taxes, Percent change	-19.30%
Income taxes and taxable-equivalent adjustment, Percent change	-19.40%
Net income, Percent change	-19.30%
Net income attributable to U.S. Bancorp, Percent change	-19.30%
Noninterest expense	4,571	4,482
Other intangibles	41	41
Total noninterest expense	4,612	4,523
Income before provision and income taxes	2,303	2,967
Provision for credit losses	393	600
Income before income taxes	1,910	2,367
Income taxes and taxable-equivalent adjustment	695	862
Net income	1,215	1,505
Net income attributable to U.S. Bancorp	1,215	1,505
Average Balance Sheet
Commercial	9,074	8,495
Commercial, Percent change	6.80%
Commercial real estate	18,836	17,923
Commercial real estate, Percent change	5.10%
Residential mortgages	50,414	47,080
Residential mortgages, Percent change	7.10%
Other retail	46,221	44,848
Other retail, Percent change	3.10%
Total loans, excluding covered loans	124,545	118,346
Total loans, excluding covered loans, Percent change	5.20%
Covered loans	5,779	6,566
Covered loans, Percent change	-12.00%
Total loans	130,324	124,912
Total loans, Percent change	4.30%
Goodwill, Percent change	2.50%
Other intangible assets, Percent change	11.20%
Assets, Percent change	2.80%
Noninterest-bearing deposits, Percent change	7.50%
Interest checking, Percent change	9.60%
Savings products, Percent change	7.90%
Time deposits, Percent change	-15.10%
Total deposits, Percent change	4.40%
Total U.S. Bancorp shareholders' equity, Percent change	-6.00%
Goodwill	3,602	3,514
Other intangible assets	2,675	2,406
Assets	144,164	140,248
Noninterest-bearing deposits	23,771	22,104
Interest checking	36,227	33,046
Savings products	50,034	46,357
Time deposits	17,953	21,138
Total deposits	127,985	122,645
Total U.S. Bancorp shareholders' equity	11,483	12,218
Wealth Management and Securities Services [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	370	342
Net interest income (taxable-equivalent basis), Percent change	8.20%
Noninterest income	1,395	1,267
Noninterest income, Percent change	10.10%
Total net revenue	1,765	1,609
Total net revenue, Percent change	9.70%
Noninterest expense, Percent change	3.30%
Other intangibles, Percent change	-10.80%
Total noninterest expense, Percent change	2.90%
Income before provision and income taxes, Percent change	44.00%
Provision for credit losses, Percent change	50.00%
Income before income taxes, Percent change	43.80%
Income taxes and taxable-equivalent adjustment, Percent change	45.70%
Net income, Percent change	42.80%
Net income attributable to U.S. Bancorp, Percent change	42.80%
Noninterest expense	1,349	1,306
Other intangibles	33	37
Total noninterest expense	1,382	1,343
Income before provision and income taxes	383	266
Provision for credit losses	9	6
Income before income taxes	374	260
Income taxes and taxable-equivalent adjustment	137	94
Net income	237	166
Net income attributable to U.S. Bancorp	237	166
Average Balance Sheet
Commercial	1,960	1,711
Commercial, Percent change	14.60%
Commercial real estate	607	652
Commercial real estate, Percent change	-6.90%
Residential mortgages	1,383	875
Residential mortgages, Percent change	58.10%
Other retail	1,456	1,533
Other retail, Percent change	-5.00%
Total loans, excluding covered loans	5,406	4,771
Total loans, excluding covered loans, Percent change	13.30%
Covered loans	4	14
Covered loans, Percent change	-71.40%
Total loans	5,410	4,785
Total loans, Percent change	13.10%
Goodwill, Percent change	2.10%
Other intangible assets, Percent change	-8.10%
Assets, Percent change	11.10%
Noninterest-bearing deposits, Percent change	3.60%
Interest checking, Percent change	22.50%
Savings products, Percent change	9.20%
Time deposits, Percent change	-20.50%
Total deposits, Percent change	6.00%
Total U.S. Bancorp shareholders' equity, Percent change	-4.30%
Goodwill	1,568	1,535
Other intangible assets	159	173
Assets	8,489	7,644
Noninterest-bearing deposits	15,120	14,595
Interest checking	5,866	4,789
Savings products	29,288	26,819
Time deposits	3,899	4,903
Total deposits	54,173	51,106
Total U.S. Bancorp shareholders' equity	2,283	2,385
Payment Services [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	1,740	1,584
Net interest income (taxable-equivalent basis), Percent change	9.80%
Noninterest income	3,292	3,205
Noninterest income, Percent change	2.70%
Total net revenue	5,032	4,789
Total net revenue, Percent change	5.10%
Noninterest expense, Percent change	3.20%
Other intangibles, Percent change	-11.70%
Total noninterest expense, Percent change	2.40%
Income before provision and income taxes, Percent change	7.80%
Provision for credit losses, Percent change	-0.40%
Income before income taxes, Percent change	11.70%
Income taxes and taxable-equivalent adjustment, Percent change	11.90%
Net income, Percent change	11.70%
Net (income) loss attributable to noncontrolling interests, Percent change	10.30%
Net income attributable to U.S. Bancorp, Percent change	12.60%
Noninterest expense	2,356	2,282
Other intangibles	121	137
Total noninterest expense	2,477	2,419
Income before provision and income taxes	2,555	2,370
Provision for credit losses	766	769
Income before income taxes	1,789	1,601
Income taxes and taxable-equivalent adjustment	651	582
Net income	1,138	1,019
Net (income) loss attributable to noncontrolling interests	-35	-39
Net income attributable to U.S. Bancorp	1,103	980
Average Balance Sheet
Commercial	6,542	6,086
Commercial, Percent change	7.50%
Credit card	17,635	16,813
Credit card, Percent change	4.90%
Other retail	672	737
Other retail, Percent change	-8.80%
Total loans, excluding covered loans	24,849	23,636
Total loans, excluding covered loans, Percent change	5.10%
Covered loans	5	5
Total loans	24,854	23,641
Total loans, Percent change	5.10%
Goodwill, Percent change	0.10%
Other intangible assets, Percent change	-15.60%
Assets, Percent change	4.20%
Noninterest-bearing deposits, Percent change	5.10%
Interest checking, Percent change	23.60%
Savings products, Percent change	36.80%
Total deposits, Percent change	13.50%
Total U.S. Bancorp shareholders' equity, Percent change	-5.80%
Goodwill	2,514	2,511
Other intangible assets	483	572
Assets	31,098	29,844
Noninterest-bearing deposits	739	703
Interest checking	555	449
Savings products	78	57
Total deposits	1,372	1,209
Total U.S. Bancorp shareholders' equity	5,697	6,046
Treasury and Corporate Support [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	2,513	2,293
Net interest income (taxable-equivalent basis), Percent change	9.60%
Noninterest income	896	309
Securities gains (losses), net	3	9
Securities gains (losses), net, Percent change	-66.70%
Total net revenue	3,412	2,611
Total net revenue, Percent change	30.70%
Noninterest expense, Percent change	31.30%
Total noninterest expense, Percent change	31.30%
Income before provision and income taxes, Percent change	30.40%
Provision for credit losses, Percent change	-66.70%
Income before income taxes, Percent change	33.30%
Net income, Percent change	22.90%
Net income attributable to U.S. Bancorp, Percent change	12.70%
Noninterest expense	1,002	763
Total noninterest expense	1,002	763
Income before provision and income taxes	2,410	1,848
Provision for credit losses	18	54
Income before income taxes	2,392	1,794
Income taxes and taxable-equivalent adjustment	189	2
Net income	2,203	1,792
Net (income) loss attributable to noncontrolling interests	-22	143
Net income attributable to U.S. Bancorp	2,181	1,935
Average Balance Sheet
Commercial	169	208
Commercial, Percent change	-18.80%
Commercial real estate	195	96
Residential mortgages	1	1
Total loans, excluding covered loans	365	305
Total loans, excluding covered loans, Percent change	19.70%
Covered loans	1,582	3,095
Covered loans, Percent change	-48.90%
Total loans	1,947	3,400
Total loans, Percent change	-42.70%
Assets, Percent change	12.40%
Savings products, Percent change	17.80%
Total U.S. Bancorp shareholders' equity, Percent change	30.50%
Other intangible assets		2
Assets	109,892	97,764
Noninterest-bearing deposits	1,183	581
Interest checking	1	1
Savings products	106	90
Time deposits	1,765	694
Total deposits	3,055	1,366
Total U.S. Bancorp shareholders' equity	$15,631	$11,981

Significant_Accounting_Policie4

Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
	Business
	Segment
Significant Accounting Policies Additional Information [Line Items]
Number of reportable operating segments	5
Wealth Management and Securities Services Number of Businesses	5
Maximum equity investments in public entities accounted for as available for sale securities and carried at fair value	20.00%
Minimum ownership percentage for significant influence accounted for using equity method	20.00%
Maximum ownership percentage for significant influence accounted for using equity method	50.00%
Minimum ownership percentage for Limited Partnerships and Limited Liability Companies accounted for using equity method	5.00%
Number of loan portfolio segments	3
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
Maximum restructuring period under credit card and other retail loan financial difficulty modifications	60 months
Pension assets unrealized difference between actual experience and expected returns amortization period	12 years
Junior Lien [Member]
Significant Accounting Policies Additional Information [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]
Significant Accounting Policies Additional Information [Line Items]
Loans and lines in a junior lien position placed on nonaccrual status when behind a first lien past due	180 days
Commercial Lending Segment [Member]
Significant Accounting Policies Additional Information [Line Items]
Number of classes of loans	2
Commercial Lending Segment [Member] | Minimum [Member]
Significant Accounting Policies Additional Information [Line Items]
Impairment loan threshold for allowance in which loans are individually analyzed	5
Commercial Lending Segment [Member] | Maximum [Member]
Significant Accounting Policies Additional Information [Line Items]
Period of loss experience	14 years
Consumer Lending Segment [Member]
Significant Accounting Policies Additional Information [Line Items]
Number of classes of loans	3
Covered Loan [Member]
Significant Accounting Policies Additional Information [Line Items]
Number of classes of loans	1
Furniture and Equipment [Member] | Minimum [Member]
Significant Accounting Policies Additional Information [Line Items]
Useful life	3 years
Furniture and Equipment [Member] | Maximum [Member]
Significant Accounting Policies Additional Information [Line Items]
Useful life	20 years
Building [Member]
Significant Accounting Policies Additional Information [Line Items]
Useful life	40 years

Business_Combinations_Addition

Business Combinations - Additional Information (Detail) (USD $)	Jun. 30, 2014	Feb. 28, 2013	Nov. 30, 2013
In Millions, unless otherwise specified
Charter One Acquisition [Member]
Business Acquisition [Line Items]
Value of asset acquired	$969
Value of liability acquired	4,800
Collective Point of Sale Solutions Acquisition [Member]
Business Acquisition [Line Items]
Value of asset acquired		34
Value of liability acquired		4
Quintillion Holding Company Limited Acquisition [Member]
Business Acquisition [Line Items]
Value of asset acquired			57
Value of liability acquired			$10

Restrictions_on_Cash_and_Due_f1

Restrictions on Cash and Due from Banks - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Cash and Cash Equivalents [Abstract]
Minimum average reserve balances to be maintain at bank subsidiaries	$2	$1.80
Balances held at the federal reserve	$4.40	$1.90

Investment_Securities_Investme2

Investment Securities - Investment Securities Held to Maturity (Detail) (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	$44,974	[1]	$38,920	[1]
Held-to-maturity securities, Unrealized Gains	362		205
Held-to-maturity securities, Unrealized Losses Other-than-Temporary			-1
Held-to-maturity securities, Unrealized Losses Other	-196		-756
Held-to-maturity securities, fair value	45,140		38,368
U.S. Treasury and Agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	2,717		3,114
Held-to-maturity securities, Unrealized Gains	15		5
Held-to-maturity securities, Unrealized Losses Other	-18		-79
Held-to-maturity securities, fair value	2,714		3,040
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	42,204		35,671
Held-to-maturity securities, Unrealized Gains	335		187
Held-to-maturity securities, Unrealized Losses Other	-176		-665
Held-to-maturity securities, fair value	42,363		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, fair value	1		1
Asset-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	13
Held-to-maturity securities, fair value	24
Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Unrealized Gains	7		9
Held-to-maturity securities, fair value	7		9
Asset-Backed Securities [Member] | Asset-Backed Securities Other [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	13		16
Held-to-maturity securities, Unrealized Gains	4		4
Held-to-maturity securities, Unrealized Losses Other-than-Temporary			-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	9		12
Held-to-maturity securities, Unrealized Gains	1
Held-to-maturity securities, Unrealized Losses Other	-1
Held-to-maturity securities, fair value	9		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, fair value	9		7
Other Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	21		99
Held-to-maturity securities, Unrealized Losses Other	-1		-11
Held-to-maturity securities, fair value	$20		$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 $)	Dec. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	$55,432		$41,059
Available-for-sale securities, Unrealized Gains	980		651
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-3		-13
Available-for-sale securities, Unrealized Losses Other	-340		-762
Available-for-sale securities, Fair Value	56,069	[1]	40,935	[1]
U.S. Treasury and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	2,622		1,108
Available-for-sale securities, Unrealized Gains	14		4
Available-for-sale securities, Unrealized Losses Other	-4		-67
Available-for-sale securities, Fair Value	2,632		1,045
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	44,668		31,633
Available-for-sale securities, Unrealized Gains	593		449
Available-for-sale securities, Unrealized Losses Other	-244		-529
Available-for-sale securities, Fair Value	45,017		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	399		486
Available-for-sale securities, Unrealized Gains	9		4
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-2		-8
Available-for-sale securities, Unrealized Losses Other	-1		-4
Available-for-sale securities, Fair Value	405		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	261		297
Available-for-sale securities, Unrealized Gains	20		5
Available-for-sale securities, Unrealized Losses Other-than-Temporary	-1		-5
Available-for-sale securities, Fair Value	280		297
Commercial [Member] | Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	112		148
Available-for-sale securities, Unrealized Gains	3		4
Available-for-sale securities, Fair Value	115		152
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	625
Available-for-sale securities, Fair Value	641
Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	18		20
Available-for-sale securities, Unrealized Gains	4		4
Available-for-sale securities, Fair Value	22		24
Asset-Backed Securities [Member] | Asset-Backed Securities Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	607		616
Available-for-sale securities, Unrealized Gains	13		13
Available-for-sale securities, Unrealized Losses Other	-1
Available-for-sale securities, Fair Value	619		629
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	5,604		5,673
Available-for-sale securities, Unrealized Gains	265		116
Available-for-sale securities, Unrealized Losses Other	-1		-51
Available-for-sale securities, Fair Value	5,868		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, 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	-79		-94
Available-for-sale securities, Fair Value	614		640
Perpetual Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	200		205
Available-for-sale securities, Unrealized Gains	27		24
Available-for-sale securities, Unrealized Losses Other	-10		-17
Available-for-sale securities, Fair Value	217		212
Other Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	245		133
Available-for-sale securities, Unrealized Gains	29		28
Available-for-sale securities, Fair Value	$274		$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)	Dec. 31, 2014
	CreditScore
Investments, Debt and Equity Securities [Abstract]
Minimum weighted average credit score of prime securities	725
Maximum loan-to-value of prime securities	80.00%

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Weighted-average maturity of available-for-sale investment securities	4 years 3 months 18 days	6 years
Weighted-average yields of available-for-sale investment securities	2.32%	2.64%
Weighted average maturity of held-to-maturity investment securities	4 years	4 years 6 months
Weighted-average yields of held-to-maturity investment securities	1.92%	2.00%
Fair value of securities pledged	$12,600,000,000	$17,300,000,000
Fair value of securities pledged as collateral where counterparty has right to repledge or resell	$856,000,000	$2,100,000,000

Investment_Securities_Amount_o

Investment Securities - Amount of Interest Income from Taxable and Non-Taxable Investment Securities (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Income, Securities, Operating, by Taxable Status [Abstract]
Taxable	$1,634	$1,375	$1,515
Non-taxable	232	256	277
Total interest income from investment securities	$1,866	$1,631	$1,792

Investment_Securities_Amount_o1

Investment Securities - Amount of Gross Gains and Losses Realized through Sales of Available-for-sale Investment Securities (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments [Abstract]
Realized gains	$11	$23	$158
Realized losses			-99
Net realized gains (losses)	11	23	59
Income tax (benefit) on net realized gains (losses)	$4	$9	$23

Investment_Securities_Summary_

Investment Securities - Summary of Other-than-Temporary Impairment by Investment Category (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Other Gains (Losses)	$1	$8	$12
Available-for-Sale Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Losses Recorded in Earnings	-8	-14	-74
Other Gains (Losses)	1	8	12
Total Available for sale other-than-temporary impairment	-7	-6	-62
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	-6	-12
Other Gains (Losses)	1	2	-9
Total Available for sale other-than-temporary impairment		-4	-21
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	-8	-33
Other Gains (Losses)		6	21
Total Available for sale other-than-temporary impairment	-2	-2	-12
Available-for-Sale Securities [Member] | Perpetual Preferred Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Losses Recorded in Earnings	-5		-27
Total Available for sale other-than-temporary impairment	-5		-27
Commercial Non-Agency Mortgage-Backed Securities [Member] | Available-for-Sale Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Losses Recorded in Earnings			-1
Other Gains (Losses)			-1
Total Available for sale other-than-temporary impairment			-2
Other Asset-Backed Securities [Member] | Available-for-Sale Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Losses Recorded in Earnings			-1
Other Gains (Losses)			$1

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])	12 Months Ended
	Dec. 31, 2014
Non-Agency Prime [Member] | Minimum [Member]
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]
Estimated lifetime prepayment rates	7.00%
Lifetime probability of default rates	3.00%
Lifetime loss severity rates	15.00%
Non-Agency Prime [Member] | Maximum [Member]
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]
Estimated lifetime prepayment rates	20.00%
Lifetime probability of default rates	7.00%
Lifetime loss severity rates	60.00%
Non-Agency Prime [Member] | Average [Member]
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]
Estimated lifetime prepayment rates	16.00%
Lifetime probability of default rates	4.00%
Lifetime loss severity rates	47.00%
Non-Agency Non-Prime [Member] | Minimum [Member]
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]
Estimated lifetime prepayment rates	1.00%
Lifetime probability of default rates	6.00%
Lifetime loss severity rates	40.00%
Non-Agency Non-Prime [Member] | 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	14.00%
Lifetime loss severity rates	75.00%
Non-Agency Non-Prime [Member] | Average [Member]
Assumption Ranges for Available-for-Sale Non-Agency Mortgage-Backed Securities Other-Than- Temporarily Impaired [Line Items]
Estimated lifetime prepayment rates	5.00%
Lifetime probability of default rates	9.00%
Lifetime loss severity rates	56.00%

Investment_Securities_Changes_

Investment Securities - Changes in Credit Losses on Debt Securities Excluding Perpetual Preferred Securities (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Credit Losses on Debt Securities [RollForward]
Balance at beginning of period	$116	$134	$298
Credit losses on securities not previously considered other-than-temporarily impaired			6
Decreases in expected cash flows on securities for which other-than-temporary impairment was previously recognized	3	14	41
Total other-than-temporary impairment on debt securities	3	14	47
Increases in expected cash flows	-5	-2	-15
Realized losses	-13	-23	-39
Credit losses on security sales and securities expected to be sold		-7	-157
Balance at end of period	$101	$116	$134

Investment_Securities_Gross_Un

Investment Securities - Gross Unrealized Losses and Fair Value of Company's Investment Securities (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	$5,462
Unrealized Losses Less Than 12 Months	-21
Fair Value 12 Months or Greater	8,295
Unrealized Losses 12 Months or Greater	-175
Fair Value Total	13,757
Unrealized Losses Total	-196
Fair Value Less Than 12 Months	5,199
Unrealized Losses Less Than 12 Months	-33
Fair Value 12 Months or Greater	9,665
Unrealized Losses 12 Months or Greater	-310
Fair Value Total	14,864
Unrealized Losses Total	-343
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	5,276
Unrealized Losses Less Than 12 Months	-19
Fair Value 12 Months or Greater	7,283
Unrealized Losses 12 Months or Greater	-157
Fair Value Total	12,559
Unrealized Losses Total	-176
Fair Value Less Than 12 Months	4,913
Unrealized Losses Less Than 12 Months	-31
Fair Value 12 Months or Greater	8,203
Unrealized Losses 12 Months or Greater	-213
Fair Value Total	13,116
Unrealized Losses Total	-244
Mortgage-Backed Securities Residential [Member] | Non-Agency Prime [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	106
Unrealized Losses Less Than 12 Months	-1
Fair Value 12 Months or Greater	70
Unrealized Losses 12 Months or Greater	-2
Fair Value Total	176
Unrealized Losses Total	-3
Mortgage-Backed Securities Residential [Member] | Non-Agency Non-Prime [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	17
Fair Value 12 Months or Greater	21
Unrealized Losses 12 Months or Greater	-1
Fair Value Total	38
Unrealized Losses Total	-1
U.S. Treasury and Agencies [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	184
Unrealized Losses Less Than 12 Months	-1
Fair Value 12 Months or Greater	986
Unrealized Losses 12 Months or Greater	-17
Fair Value Total	1,170
Unrealized Losses Total	-18
Fair Value Less Than 12 Months	100
Fair Value 12 Months or Greater	741
Unrealized Losses 12 Months or Greater	-4
Fair Value Total	841
Unrealized Losses Total	-4
Asset-Backed Securities [Member] | Asset-Backed Securities Other [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	6
Fair Value Total	6
Fair Value Less Than 12 Months	4
Fair Value 12 Months or Greater	23
Unrealized Losses 12 Months or Greater	-1
Fair Value Total	27
Unrealized Losses Total	-1
Obligations of State and Political Subdivisions [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	2
Unrealized Losses Less Than 12 Months	-1
Fair Value Total	2
Unrealized Losses Total	-1
Fair Value Less Than 12 Months	53
Unrealized Losses Less Than 12 Months	-1
Fair Value 12 Months or Greater	104
Fair Value Total	157
Unrealized Losses Total	-1
Other Debt Securities [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	20
Unrealized Losses 12 Months or Greater	-1
Fair Value Total	20
Unrealized Losses Total	-1
Obligations of Foreign Governments [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	6
Fair Value Total	6
Corporate Debt Securities [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	429
Unrealized Losses 12 Months or Greater	-79
Fair Value Total	429
Unrealized Losses Total	-79
Perpetual Preferred Securities [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	74
Unrealized Losses 12 Months or Greater	-10
Fair Value Total	74
Unrealized Losses Total	($10)

Investment_Securities_Gross_Un1

Investment Securities - Gross Unrealized Losses and Fair Value of Company's Investment Securities (Parenthetical) (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Residential Non-Agency Mortgage-Backed Securities Unrealized Losses	$343
Non-Agency [Member] | Mortgage-Backed Securities Residential [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Residential Non-Agency Mortgage-Backed Securities Unrealized Losses	$4

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses - Composition of Loan Portfolio (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	$242,570	$226,773
Total loans	247,851	235,235
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	74,996	64,762
Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	5,381	5,271
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	80,377	70,033
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	33,360	32,183
Construction and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	9,435	7,702
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	42,795	39,885
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	38,598	37,545
Home Equity Loans, First Liens [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	13,021	13,611
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	51,619	51,156
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	18,515	18,021
Retail Leasing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	5,871	5,929
Home Equity And Second Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	15,916	15,442
Revolving Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	3,309	3,276
Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	6,242	5,709
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	14,822	13,743
Student [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	3,104	3,579
Other Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	49,264	47,678
Total Loans, Excluding Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	242,570	226,773
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$5,281	$8,462

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	MortgageLoan
Loans and Allowance for Credit Losses [Line Items]
Loans pledged at the Federal Home Loan Bank ("FHLB")	$79,800,000,000	$77,200,000,000
Loans pledged at the Federal Reserve Bank	61,800,000,000	53,000,000,000
Outstanding advances to joint venture, whose principal activities are to lend to entities that develop land and sell residential homes	135,000,000	205,000,000
Unearned interest and deferred fees and costs on loans	574,000,000	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
Foreclosed residential real estate property included in other real estate owned	270,000,000
Foreclosed residential real estate property included in other real estate owned excluding covered assets	233,000,000
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	641,000,000
Residential mortgage loans secured by residential real estate in process of foreclosure	2,900,000,000
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	1,778
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	222,000,000
Remaining term for residential mortgages and home equity and second mortgage loans covered under loss sharing agreements	5 years
Purchased impaired loans included in covered loans classified as nonperforming assets		5,000,000
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
Residential Mortgages [Member]
Loans and Allowance for Credit Losses [Line Items]
Number of loans in trial period	226
Outstanding balance of loans in trial period	25,000,000
Estimated post-modification balance of loans in trial period	29,000,000
Home Equity and Second Mortgage Loans [Member]
Loans and Allowance for Credit Losses [Line Items]
Number of loans in trial period	16
Outstanding balance of loans in trial period	1,000,000
Estimated post-modification balance of loans in trial period	1,000,000
Loans Purchased from GNMA Mortgage Pools [Member]
Loans and Allowance for Credit Losses [Line Items]
Number of loans in trial period	1,540
Outstanding balance of loans in trial period	198,000,000
Estimated post-modification balance of loans in trial period	$198,000,000

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses - Changes in Accretable Balance for Purchased Impaired Loans (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deteriorated Loans Transferred in [Abstract]
Balance at beginning of period	$1,655	$1,709	$2,619
Purchases			13
Accretion	-441	-499	-437
Disposals	-131	-172	-208
Reclassifications from nonaccretable difference	229	258	454
Other	-3	359	-732
Balance at end of period	$1,309	$1,655	$1,709

Recovered_Sheet1

Loans and Allowance for Credit Losses - Activity in Allowance for Credit Losses by Portfolio Type (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$4,537	$4,733	$5,014
Provision for credit losses	1,229	1,340	1,882
Loans charged off	1,679	1,934	2,527
Less recoveries of loans charged off	-345	-469	-430
Net loans charged off	1,334	1,465	2,097
Other changes	-57	-71	-66
Balance at end of period	4,375	4,537	4,733
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	1,075	1,051	1,010
Provision for credit losses	266	144	316
Loans charged off	305	246	378
Less recoveries of loans charged off	-110	-126	-103
Net loans charged off	195	120	275
Balance at end of period	1,146	1,075	1,051
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	776	857	1,154
Provision for credit losses	-63	-114	-131
Loans charged off	36	92	242
Less recoveries of loans charged off	-49	-125	-76
Net loans charged off	-13	-33	166
Balance at end of period	726	776	857
Residential Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	875	935	927
Provision for credit losses	107	212	446
Loans charged off	216	297	461
Less recoveries of loans charged off	-21	-25	-23
Net loans charged off	195	272	438
Balance at end of period	787	875	935
Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	884	863	992
Provision for credit losses	657	677	571
Loans charged off	725	739	769
Less recoveries of loans charged off	-67	-83	-102
Net loans charged off	658	656	667
Other changes	-3		-33
Balance at end of period	880	884	863
Other Retail [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	781	848	831
Provision for credit losses	278	351	558
Loans charged off	384	523	666
Less recoveries of loans charged off	-96	-105	-125
Net loans charged off	288	418	541
Balance at end of period	771	781	848
Total Loans, Excluding Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	4,391	4,554	4,914
Provision for credit losses	1,245	1,270	1,760
Loans charged off	1,666	1,897	2,516
Less recoveries of loans charged off	-343	-464	-429
Net loans charged off	1,323	1,433	2,087
Other changes	-3		-33
Balance at end of period	4,310	4,391	4,554
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	146	179	100
Provision for credit losses	-16	70	122
Loans charged off	13	37	11
Less recoveries of loans charged off	-2	-5	-1
Net loans charged off	11	32	10
Other changes	-54	-71	-33
Balance at end of period	$65	$146	$179

Recovered_Sheet2

Loans and Allowance for Credit Losses - Additional Detail of Allowance for Credit Losses and Related Loan Balances by Portfolio Type (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Allowance Balance at End of Period
Loans individually evaluated for impairment	$9	$32
TDRs collectively evaluated for impairment	449	520
Other loans collectively evaluated for impairment	3,825	3,815
Loans acquired with deteriorated credit quality	92	170
Total allowance for credit losses	4,375	4,537	4,733	5,014
Loan balance at end of period
Loans individually evaluated for impairment	299	496
TDRs collectively evaluated for impairment	5,681	6,243
Other loans collectively evaluated for impairment	238,555	224,557
Loans acquired with deteriorated credit quality	3,316	3,939
Total loans	242,570	226,773
Total loans	247,851	235,235
Commercial [Member]
Allowance Balance at End of Period
Loans individually evaluated for impairment	5	15
TDRs collectively evaluated for impairment	12	19
Other loans collectively evaluated for impairment	1,129	1,041
Total allowance for credit losses	1,146	1,075	1,051	1,010
Loan balance at end of period
Loans individually evaluated for impairment	159	197
TDRs collectively evaluated for impairment	124	155
Other loans collectively evaluated for impairment	80,093	69,680
Loans acquired with deteriorated credit quality	1	1
Total loans	80,377	70,033
Commercial Real Estate [Member]
Allowance Balance at End of Period
Loans individually evaluated for impairment	4	17
TDRs collectively evaluated for impairment	12	26
Other loans collectively evaluated for impairment	678	700
Loans acquired with deteriorated credit quality	32	33
Total allowance for credit losses	726	776	857	1,154
Loan balance at end of period
Loans individually evaluated for impairment	128	237
TDRs collectively evaluated for impairment	393	358
Other loans collectively evaluated for impairment	41,744	39,129
Loans acquired with deteriorated credit quality	530	161
Total loans	42,795	39,885
Residential Mortgages [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	319	329
Other loans collectively evaluated for impairment	468	546
Total allowance for credit losses	787	875	935	927
Loan balance at end of period
Loans individually evaluated for impairment	12
TDRs collectively evaluated for impairment	4,653	5,064
Other loans collectively evaluated for impairment	46,953	46,090
Loans acquired with deteriorated credit quality	1	2
Total loans	51,619	51,156
Credit Card [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	61	87
Other loans collectively evaluated for impairment	819	797
Total allowance for credit losses	880	884	863	992
Loan balance at end of period
TDRs collectively evaluated for impairment	240	310
Other loans collectively evaluated for impairment	18,275	17,711
Total loans	18,515	18,021
Other Retail [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	41	55
Other loans collectively evaluated for impairment	730	726
Total allowance for credit losses	771	781	848	831
Loan balance at end of period
TDRs collectively evaluated for impairment	237	269
Other loans collectively evaluated for impairment	49,027	47,409
Total loans	49,264	47,678
Total Loans, Excluding Covered Loans [Member]
Allowance Balance at End of Period
Loans individually evaluated for impairment	9	32
TDRs collectively evaluated for impairment	445	516
Other loans collectively evaluated for impairment	3,824	3,810
Loans acquired with deteriorated credit quality	32	33
Total allowance for credit losses	4,310	4,391	4,554	4,914
Loan balance at end of period
Loans individually evaluated for impairment	299	434
TDRs collectively evaluated for impairment	5,647	6,156
Other loans collectively evaluated for impairment	236,092	220,019
Loans acquired with deteriorated credit quality	532	164
Total loans	242,570	226,773
Covered Loans [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	4	4
Other loans collectively evaluated for impairment	1	5
Loans acquired with deteriorated credit quality	60	137
Total allowance for credit losses	65	146	179	100
Loan balance at end of period
Loans individually evaluated for impairment		62
TDRs collectively evaluated for impairment	34	87
Other loans collectively evaluated for impairment	2,463	4,538
Loans acquired with deteriorated credit quality	2,784	3,775
Total loans	$5,281	$8,462

Recovered_Sheet3

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 $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$244,327	$231,097
Accruing 30-89 Days Past Due	1,113	1,346
Accruing 90 Days or More Past Due	945	1,189
Nonperforming	1,466	1,603
Total loans, excluding covered loans	242,570	226,773
Total loans	247,851	235,235
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	79,977	69,587
Accruing 30-89 Days Past Due	247	257
Accruing 90 Days or More Past Due	41	55
Nonperforming	112	134
Total loans, excluding covered loans	80,377	70,033
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	42,406	39,459
Accruing 30-89 Days Past Due	110	94
Accruing 90 Days or More Past Due	20	29
Nonperforming	259	303
Total loans, excluding covered loans	42,795	39,885
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	50,330	49,695
Accruing 30-89 Days Past Due	221	358
Accruing 90 Days or More Past Due	204	333
Nonperforming	864	770
Total loans, excluding covered loans	51,619	51,156
Credit Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	18,046	17,507
Accruing 30-89 Days Past Due	229	226
Accruing 90 Days or More Past Due	210	210
Nonperforming	30	78
Total loans, excluding covered loans	18,515	18,021
Other Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	48,764	47,156
Accruing 30-89 Days Past Due	238	245
Accruing 90 Days or More Past Due	75	86
Nonperforming	187	191
Total loans, excluding covered loans	49,264	47,678
Total Loans, Excluding Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	239,523	223,404
Accruing 30-89 Days Past Due	1,045	1,180
Accruing 90 Days or More Past Due	550	713
Nonperforming	1,452	1,476
Total loans, excluding covered loans	242,570	226,773
Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,804	7,693
Accruing 30-89 Days Past Due	68	166
Accruing 90 Days or More Past Due	395	476
Nonperforming	14	127
Total loans	$5,281	$8,462

Recovered_Sheet4

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 $)	Dec. 31, 2014	Dec. 31, 2013
Government National Mortgage Association [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans 30-89 days past due purchased from Government National Mortgage Association mortgage pools whose payments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, were classified as current	$431,000,000	$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

Recovered_Sheet5

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Type and Company's Internal Credit Quality Rating (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	$242,570	$226,773
Total loans	247,851	235,235
Total outstanding commitments	508,678	477,797
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	242,581	229,546
Total outstanding commitments	501,535	470,046
Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,680	1,679
Total outstanding commitments	2,964	2,939
Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,590	4,010
Total outstanding commitments	4,179	4,812
Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,270	5,689
Total outstanding commitments	7,143	7,751
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	80,377	70,033
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	78,409	68,075
Commercial [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,204	1,013
Commercial [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	764	945
Commercial [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,968	1,958
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	42,795	39,885
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	41,322	38,113
Commercial Real Estate [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	451	616
Commercial Real Estate [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,022	1,156
Commercial Real Estate [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,473	1,772
Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	51,619	51,156
Residential Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	50,479	50,152
Residential Mortgages [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	5	5
Residential Mortgages [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,135	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	18,515	18,021
Credit Card [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	18,275	17,733
Credit Card [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	240	288
Credit Card [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	240	288
Other Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	49,264	47,678
Other Retail [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	48,932	47,313
Other Retail [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	20	27
Other Retail [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	312	338
Other Retail [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	332	365
Total Loans, Excluding Covered Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	242,570	226,773
Total Loans, Excluding Covered Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	237,417	221,386
Total Loans, Excluding Covered Loans [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,680	1,661
Total Loans, Excluding Covered Loans [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,473	3,726
Total Loans, Excluding Covered Loans [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	5,153	5,387
Covered Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,281	8,462
Covered Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,164	8,160
Covered Loans [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans		18
Covered Loans [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	117	284
Covered Loans [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$117	$302

Recovered_Sheet6

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 $)	Dec. 31, 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	$2.20	$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_Sheet7

Loans and Allowance for Credit Losses - Summary of Impaired Loans by Portfolio Class (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	$6,571	$7,602
Unpaid Principal Balance	8,623	10,136
Valuation Allowance	476	599
Commitments to Lend Additional Funds	74	112
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	329	382
Unpaid Principal Balance	769	804
Valuation Allowance	21	36
Commitments to Lend Additional Funds	51	54
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	624	693
Unpaid Principal Balance	1,250	1,322
Valuation Allowance	23	51
Commitments to Lend Additional Funds	18	40
Residential Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	2,730	2,767
Unpaid Principal Balance	3,495	3,492
Valuation Allowance	273	308
Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	240	310
Unpaid Principal Balance	240	310
Valuation Allowance	61	87
Other Retail [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	361	391
Unpaid Principal Balance	570	593
Valuation Allowance	44	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	4,284	4,543
Unpaid Principal Balance	6,324	6,521
Valuation Allowance	422	541
Commitments to Lend Additional Funds	73	108
Loans Purchased from GNMA Mortgage Pools [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	2,244	2,607
Unpaid Principal Balance	2,244	2,607
Valuation Allowance	50	28
Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	43	452
Unpaid Principal Balance	55	1,008
Valuation Allowance	4	30
Commitments to Lend Additional Funds	$1	$4

Recovered_Sheet8

Loans and Allowance for Credit Losses - Summary of Impaired Loans by Portfolio Class (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Loan and Lease Receivables, Impaired [Abstract]
Interest income recognized on impaired loans	$341
Interest income that would have been recognized on impaired loans at original contractual loan terms	$470

Recovered_Sheet9

Loans and Allowance for Credit Losses - Impaired Loans Average Recorded Investment and Interest Income (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$7,341	$7,338	$7,740
Interest Income Recognized	340	369	340
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	414	382	470
Interest Income Recognized	9	29	18
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	592	889	1,314
Interest Income Recognized	26	39	43
Residential Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,742	2,749	2,717
Interest Income Recognized	140	134	130
Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	273	366	510
Interest Income Recognized	9	16	28
Other Retail [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	377	424	301
Interest Income Recognized	17	24	19
Total Impaired Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,398	4,810	5,312
Interest Income Recognized	201	242	238
Loans Purchased from GNMA Mortgage Pools [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,609	1,967	1,448
Interest Income Recognized	124	100	73
Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	334	561	980
Interest Income Recognized	$15	$27	$29

Recovered_Sheet10

Loans and Allowance for Credit Losses - Summary of Loans Modified as TDRs (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	SecurityLoan	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans	42,542	44,733	79,262
Pre-Modification Outstanding Loan Balance	$1,809	$2,158	$3,515
Post-Modification Outstanding Loan Balance	1,781	2,058	3,394
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2,027	2,429	4,843
Pre-Modification Outstanding Loan Balance	238	166	307
Post-Modification Outstanding Loan Balance	203	155	272
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	78	165	312
Pre-Modification Outstanding Loan Balance	80	205	493
Post-Modification Outstanding Loan Balance	71	198	461
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2,089	2,179	4,616
Pre-Modification Outstanding Loan Balance	271	309	638
Post-Modification Outstanding Loan Balance	274	304	623
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	26,511	26,669	49,320
Pre-Modification Outstanding Loan Balance	144	160	241
Post-Modification Outstanding Loan Balance	145	161	255
Other Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2,833	4,290	10,461
Pre-Modification Outstanding Loan Balance	61	103	279
Post-Modification Outstanding Loan Balance	61	102	275
Total Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	33,538	35,732	69,552
Pre-Modification Outstanding Loan Balance	794	943	1,958
Post-Modification Outstanding Loan Balance	754	920	1,886
Loans Purchased from GNMA Mortgage Pools [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	8,961	8,878	9,518
Pre-Modification Outstanding Loan Balance	1,000	1,121	1,280
Post-Modification Outstanding Loan Balance	1,013	1,066	1,245
Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	43	123	192
Pre-Modification Outstanding Loan Balance	15	94	277
Post-Modification Outstanding Loan Balance	$14	$72	$263

Recovered_Sheet11

Loans and Allowance for Credit Losses - Summary of Loans Modified as TDRs in the Past Twelve Months that have Subsequently Defaulted (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	SecurityLoan	SecurityLoan	SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans	9,332	15,344	14,948
Amount Defaulted	$306	$1,117	$810
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	629	642	859
Amount Defaulted	44	46	48
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	22	87	111
Amount Defaulted	12	102	232
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	611	1,099	1,073
Amount Defaulted	86	163	146
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	6,335	6,640	9,774
Amount Defaulted	33	37	54
Other Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	845	1,841	1,818
Amount Defaulted	24	80	56
Total Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	8,442	10,309	13,635
Amount Defaulted	199	428	536
Loans Purchased from GNMA Mortgage Pools [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	876	4,972	1,245
Amount Defaulted	102	640	177
Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	14	63	68
Amount Defaulted	$5	$49	$97

Recovered_Sheet12

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Covered Assets [Line Items]
Purchased Impaired Loans	$2,784	$3,775
Purchased Nonimpaired Loans	1,322	3,087
Other Assets	1,212	1,697
Covered loans	5,281	8,462
Total covered assets	5,318	8,559
Commercial [Member]
Covered Assets [Line Items]
Purchased Impaired Loans
Purchased Nonimpaired Loans		32
Other Assets
Covered loans		32
Commercial Real Estate [Member]
Covered Assets [Line Items]
Purchased Impaired Loans		738
Purchased Nonimpaired Loans		1,494
Other Assets
Covered loans		2,232
Residential Mortgages [Member]
Covered Assets [Line Items]
Purchased Impaired Loans	2,784	3,037
Purchased Nonimpaired Loans	738	890
Other Assets
Covered loans	3,522	3,927
Credit Card [Member]
Covered Assets [Line Items]
Purchased Impaired Loans
Purchased Nonimpaired Loans		5
Other Assets
Covered loans		5
Other Retail [Member]
Covered Assets [Line Items]
Purchased Impaired Loans
Purchased Nonimpaired Loans	584	666
Other Assets
Covered loans	584	666
Losses Reimbursable by FDIC [Member]
Covered Assets [Line Items]
Purchased Impaired Loans
Purchased Nonimpaired Loans
Other Assets	717	798
Covered loans	717	798
Unamortized Changes in FDIC asset [Member]
Covered Assets [Line Items]
Purchased Impaired Loans
Purchased Nonimpaired Loans
Other Assets	458	802
Covered loans	458	802
Covered Loans [Member]
Covered Assets [Line Items]
Purchased Impaired Loans	2,784	3,775
Purchased Nonimpaired Loans	1,322	3,087
Other Assets	1,175	1,600
Covered loans	5,281	8,462
Foreclosed Real Estate [Member]
Covered Assets [Line Items]
Purchased Impaired Loans
Purchased Nonimpaired Loans
Other Assets	37	97
Total covered assets	$37	$97

Recovered_Sheet13

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loss sharing agreement remaining term	5 years

Leases_Components_of_Net_Inves

Leases - Components of Net Investment in Sales-Type and Direct Financing Leases (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Capital Leases, Net Investment in Direct Financing and Sales Type Leases [Abstract]
Aggregate future minimum lease payments to be received	$11,173	$11,074
Unguaranteed residual values accruing to the lessor's benefit	695	783
Unearned income	-1,004	-1,045
Initial direct costs	202	189
Total net investment in sales-type and direct financing leases	$11,066	$11,001

Leases_Components_of_Net_Inves1

Leases - Components of Net Investment in Sales-Type and Direct Financing Leases (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Capital Leases, Net Investment in Direct Financing and Sales Type Leases [Abstract]
Accumulated allowance for uncollectible minimum lease payments	$65	$68

Leases_Minimum_Future_Lease_Pa

Leases - Minimum Future Lease Payments to be Received from Sales-Type and Direct Financing Leases (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract]
2015	$3,696
2016	3,417
2017	2,601
2018	813
2019	291
Thereafter	$355

Accounting_for_Transfers_and_S2

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Minimum [Member]
Variable Interest Entity [Line Items]
Aggregate amount of investments in unconsolidated VIEs	$1,000,000	$1,000,000
Maximum [Member]
Variable Interest Entity [Line Items]
Aggregate amount of investments in unconsolidated VIEs	53,000,000	37,000,000
Conduit [Member]
Variable Interest Entity [Line Items]
Assets related to consolidated VIEs	35,000,000	116,000,000
Tender Option Bond Program [Member]
Variable Interest Entity [Line Items]
Assets related to consolidated VIEs	2,900,000,000	4,600,000,000
Liabilities related to consolidated VIEs	2,700,000,000	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	773,000,000	758,000,000	683,000,000
Expense related to investments	771,000,000	934,000,000	805,000,000
Expenses related to investments recognized in tax expense	258,000,000	297,000,000	282,000,000
Investment tax credits	937,000,000	780,000,000	200,000,000
Assets related to consolidated VIEs	2,700,000,000	2,500,000,000
Liabilities related to consolidated VIEs	2,000,000,000	1,800,000,000
Investment carrying amount	4,259,000,000	4,178,000,000
Maximum exposure to loss	8,393,000,000	7,390,000,000
Private Investment Funds and Partnerships [Member]
Variable Interest Entity [Line Items]
Investment carrying amount	94,000,000	98,000,000
Maximum exposure to loss	$105,000,000	$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 $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Community Development and Tax Advantaged Investments [Member]
Variable Interest Entity [Line Items]
Investment carrying amount	$4,259	$4,178
Unfunded capital and other commitments	1,743	1,661
Maximum exposure to loss	$8,393	$7,390

Premises_and_Equipment_Premise

Premises and Equipment - Premises and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	$6,728	$6,505
Less accumulated depreciation and amortization	-4,110	-3,899
Total Premises and Equipment	2,618	2,606
Land [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	534	529
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	3,323	3,256
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	2,719	2,593
Capitalized Building and Equipment Leases [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	126	103
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	$26	$24

Mortgage_Servicing_Rights_Addi

Mortgage Servicing Rights - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Transfers and Servicing of Financial Assets [Abstract]
Residential mortgage loans serviced for others including subserviced mortgages with no corresponding MSRs asset	$225,000,000,000	$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	241,000,000	192,000,000	102,000,000
Loan servicing fees	732,000,000	754,000,000	720,000,000
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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Transfers and Servicing of Financial Assets [Abstract]
Balance at beginning of period	$2,680	$1,700	$1,519
Rights purchased	5	8	42
Rights capitalized	382	769	957
Rights sold	-141
Changes in fair value of MSRs
Due to fluctuations in market interest rates	-276	617	-249
Due to revised assumptions or models	86	33	-21
Other changes in fair value	-398	-447	-548
Balance at end of period	$2,338	$2,680	$1,700

Mortgage_Servicing_Rights_Chan1

Mortgage Servicing Rights - Changes in Fair Value of Capitalized MSRs (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Transfers and Servicing of Financial Assets [Abstract]
Gain related to excess servicing rights sold	$44

Mortgage_Servicing_Rights_Sens

Mortgage Servicing Rights - Sensitivity to Changes in Market Interest Rates to Fair Value of MSRs Portfolio and Related Derivative Instruments (Detail) (USD $)	Dec. 31, 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	($540)	($435)
Net fair value 50 basis points	-242	-199
Net fair value 25 basis points	-114	-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	441	399
Net fair value 50 basis points	223	194
Net fair value 25 basis points	109	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	-19	-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	346	287
Net fair value 50 basis points	185	154
Net fair value 25 basis points	100	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	-375	-301
Net fair value 50 basis points	-197	-157
Net fair value 25 basis points	-102	-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	-29	-14
Net fair value 50 basis points	-12	-3
Net fair value 25 basis points	($2)

Mortgage_Servicing_Rights_MSRs

Mortgage Servicing Rights - MSRs and Related Characteristics by Portfolio (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Multiple	Multiple
	BasisPoint	BasisPoint
Servicing Assets at Fair Value [Line Items]
Fair value	$2,338	$2,680	$1,700	$1,519
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	222,797	226,842
Fair value	2,338	2,680
Value (bps)	105	118
Weighted-average servicing fees (bps)	29	30
Multiple (value/servicing fees)	3.62	3.93
Weighted-average note rate	4.19%	4.22%
Weighted-average age (in years)	3 years 2 months 12 days	2 years 7 months 6 days
Weighted-average expected prepayment (constant prepayment rate)	12.10%	11.20%
Weighted-average expected life (in years)	6 years 3 months 18 days	7 years 1 month 6 days
Weighted-average discount rate	10.10%	10.20%
MRBP [Member] | Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	19,706	15,896
Fair value	213	180
Value (bps)	108	113
Weighted-average servicing fees (bps)	37	39
Multiple (value/servicing fees)	2.92	2.9
Weighted-average note rate	4.58%	4.70%
Weighted-average age (in years)	3 years 7 months 6 days	3 years 9 months 18 days
Weighted-average expected prepayment (constant prepayment rate)	12.80%	13.50%
Weighted-average expected life (in years)	6 years 2 months 12 days	6 years 2 months 12 days
Weighted-average discount rate	11.90%	11.90%
Government [Member] | Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	40,471	41,659
Fair value	426	500
Value (bps)	105	120
Weighted-average servicing fees (bps)	33	32
Multiple (value/servicing fees)	3.18	3.75
Weighted-average note rate	4.18%	4.24%
Weighted-average age (in years)	3 years 2 months 12 days	2 years 7 months 6 days
Weighted-average expected prepayment (constant prepayment rate)	14.80%	11.50%
Weighted-average expected life (in years)	5 years 6 months	6 years 10 months 24 days
Weighted-average discount rate	11.20%	11.20%
Conventional [Member] | Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	162,620	169,287
Fair value	$1,699	$2,000
Value (bps)	104	118
Weighted-average servicing fees (bps)	27	29
Multiple (value/servicing fees)	3.85	4.07
Weighted-average note rate	4.14%	4.17%
Weighted-average age (in years)	3 years 1 month 6 days	2 years 6 months
Weighted-average expected prepayment (constant prepayment rate)	11.40%	10.90%
Weighted-average expected life (in years)	6 years 6 months	7 years 2 months 12 days
Weighted-average discount rate	9.60%	9.80%

Intangible_Assets_Intangible_A

Intangible Assets - Intangible Assets (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Goodwill	$9,389	$9,205	$9,143	$8,927
Mortgage servicing rights	2,338	2,680	1,700	1,519
Total	12,551	12,734
Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	174	229
Core Deposit Benefits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	234	135
Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	97	122
Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	$319	$363
Straight line method [Member] | Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	9 years
Straight line method [Member] | Core Deposit Benefits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	22 years
Straight line method [Member] | Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	10 years
Straight line method [Member] | Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	6 years
Accelerated method [Member] | Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	8 years
Accelerated method [Member] | Core Deposit Benefits [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years
Accelerated method [Member] | Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	6 years
Accelerated method [Member] | Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years

Intangible_Assets_Aggregate_Am

Intangible Assets - Aggregate Amortization Expense (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$199	$223	$274
Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	50	64	74
Core Deposit Benefits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	38	41	60
Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	27	34	39
Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$84	$84	$101

Intangible_Assets_Estimated_Am

Intangible Assets - Estimated Amortization Expense (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015	$169
2016	139
2017	118
2018	97
2019	$75

Intangible_Assets_Changes_in_C

Intangible Assets - Changes in Carrying Value of Goodwill (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill, Beginning Balance	$9,205	$9,143	$8,927
Goodwill acquired	217	57	208
Other	-33	5	8
Goodwill, Ending Balance	9,389	9,205	9,143
Wholesale Banking and Commercial Real Estate [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,605			1,605
Goodwill acquired	43
Goodwill, Ending Balance	1,648		1,605	1,605
Consumer and Small Business Banking [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	3,514			3,514
Goodwill acquired	166
Goodwill, Ending Balance	3,680		3,514	3,514
Wealth Management and Securities Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,565	1,528	1,463
Goodwill acquired	8	37	65
Other	-3
Goodwill, Ending Balance	1,570	1,565	1,528
Payment Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,521	2,496	2,345
Goodwill acquired		20	143
Other	-30	5	8
Goodwill, Ending Balance	$2,491	$2,521	$2,496

ShortTerm_Borrowings_Summary_o

Short-Term Borrowings - Summary of Short-Term Borrowings (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Short-term Debt [Line Items]
Short-term borrowings	$29,893	$27,608	$26,302
Short-term borrowings, interest rate, at year end	0.19%	0.52%	0.57%
Short-term borrowings, average for the year	30,252	27,683	28,549
Short-term borrowings, interest rate, average for the year	0.88%	1.29%	1.57%
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term borrowings	886	594	950
Short-term borrowings, interest rate, at year end	0.12%	0.11%	0.11%
Short-term borrowings, average for the year	2,366	1,879	1,338
Short-term borrowings, interest rate, average for the year	7.94%	9.72%	15.32%
Short-term borrowings, maximum month end balance	3,258	3,569	2,467
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term borrowings	948	2,057	3,388
Short-term borrowings, interest rate, at year end	0.05%	5.34%	3.26%
Short-term borrowings, average for the year	798	2,403	4,942
Short-term borrowings, interest rate, average for the year	1.07%	4.65%	3.52%
Short-term borrowings, maximum month end balance	948	3,121	5,922
Commercial Paper [Member]
Short-term Debt [Line Items]
Short-term borrowings	22,197	19,400	16,202
Short-term borrowings, interest rate, at year end	0.12%	0.11%	0.12%
Short-term borrowings, average for the year	21,227	17,467	15,806
Short-term borrowings, interest rate, average for the year	0.12%	0.12%	0.14%
Short-term borrowings, maximum month end balance	22,322	19,400	17,385
Other Short Term Borrowings [Member]
Short-term Debt [Line Items]
Short-term borrowings	5,862	5,557	5,762
Short-term borrowings, interest rate, at year end	0.51%	0.19%	0.29%
Short-term borrowings, average for the year	5,861	5,934	6,463
Short-term borrowings, interest rate, average for the year	0.78%	0.72%	0.72%
Short-term borrowings, maximum month end balance	$7,417	$6,301	$7,443

ShortTerm_Borrowings_Summary_o1

Short-Term Borrowings - Summary of Short-Term Borrowings (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Short-term Debt [Abstract]
Federal statutory rate	35.00%
Compensation expense included in federal funds purchased and short term borrowings rates	$186	$181	$203

LongTerm_Debt_Summary_of_Longt

Long-Term Debt - Summary of Long-term Debt (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$32,260	$20,049
Parent Company [Member]
Debt Instrument [Line Items]
Long-term debt	13,189	11,416
Parent Company [Member] | Capitalized Lease Obligations, Mortgage Indebtedness and Other [Member]
Debt Instrument [Line Items]
Long-term debt	190	167
Subsidiaries [Member]
Debt Instrument [Line Items]
Long-term debt	19,071	8,633
Subsidiaries [Member] | Capitalized Lease Obligations, Mortgage Indebtedness and Other [Member]
Debt Instrument [Line Items]
Long-term debt	607	563
Fixed Rate [Member] | Parent Company [Member] | Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.95%
Debt Instrument Maturity Year, start	1-Jan-22
Debt Instrument Maturity Year, End	31-Dec-22
Long-term debt	1,300	1,300
Fixed Rate [Member] | Parent Company [Member] | Subordinated Debt One [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.60%
Debt Instrument Maturity Year, start	1-Jan-24
Debt Instrument Maturity Year, End	31-Dec-24
Long-term debt	1,000
Fixed Rate [Member] | Parent Company [Member] | Subordinated Notes Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Debt Instrument Maturity Year, start	1-Jan-26
Debt Instrument Maturity Year, End	31-Dec-26
Long-term debt	199	199
Fixed Rate [Member] | Parent Company [Member] | Medium-term Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.65%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	4.13%
Debt Instrument Maturity Year, start	1-Jan-15
Debt Instrument Maturity Year, End	31-Dec-24
Long-term debt	9,250	8,750
Fixed Rate [Member] | Parent Company [Member] | Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.44%
Debt Instrument Maturity Year, start	1-Jan-16
Debt Instrument Maturity Year, End	31-Dec-16
Long-term debt	500	500
Fixed Rate [Member] | Subsidiaries [Member] | Subordinated Notes Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.30%
Debt Instrument Maturity Year, start	1-Jan-14
Debt Instrument Maturity Year, End	31-Dec-14
Long-term debt		963
Fixed Rate [Member] | Subsidiaries [Member] | Subordinated Notes Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.95%
Debt Instrument Maturity Year, start	1-Jan-14
Debt Instrument Maturity Year, End	31-Dec-14
Long-term debt		1,000
Fixed Rate [Member] | Subsidiaries [Member] | Subordinated Notes Five [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.80%
Debt Instrument Maturity Year, start	1-Jan-15
Debt Instrument Maturity Year, End	31-Dec-15
Long-term debt	500	500
Fixed Rate [Member] | Subsidiaries [Member] | Subordinated Notes Six [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.78%
Debt Instrument Maturity Year, start	1-Jan-20
Debt Instrument Maturity Year, End	31-Dec-20
Long-term debt	500	500
Fixed Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.25%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	8.25%
Debt Instrument Maturity Year, start	1-Jan-17
Debt Instrument Maturity Year, End	31-Dec-26
Long-term debt	11	13
Fixed Rate [Member] | Subsidiaries [Member] | Bank Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.10%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	2.13%
Debt Instrument Maturity Year, start	1-Jan-17
Debt Instrument Maturity Year, End	31-Dec-19
Long-term debt	4,050
Floating Rate [Member] | Parent Company [Member] | Medium-term Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.63%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	0.72%
Debt Instrument Maturity Year, start	1-Jan-18
Debt Instrument Maturity Year, End	31-Dec-19
Long-term debt	750	500
Floating Rate [Member] | Subsidiaries [Member] | Subordinated Notes Seven [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.52%
Debt Instrument Maturity Year, start	1-Jan-14
Debt Instrument Maturity Year, End	31-Dec-14
Long-term debt		373
Floating Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.24%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	0.51%
Debt Instrument Maturity Year, start	1-Jan-15
Debt Instrument Maturity Year, End	31-Dec-22
Long-term debt	7,334	4,579
Floating Rate [Member] | Subsidiaries [Member] | Bank Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	0.71%
Debt Instrument Maturity Year, start	1-Jan-15
Debt Instrument Maturity Year, End	31-Dec-54
Long-term debt	$6,069	$142

LongTerm_Debt_Summary_of_Longt1

Long-Term Debt - Summary of Long-term Debt (Parenthetical) (Detail)	Dec. 31, 2014
Medium-term Notes [Member]
Debt Instrument [Line Items]
Weighted-average interest rate	2.47%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Weighted-average interest rate	0.31%
Bank Notes [Member]
Debt Instrument [Line Items]
Weighted-average interest rate	0.85%

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (Federal Home Loan Bank and Federal Reserve Bank [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Federal Home Loan Bank and Federal Reserve Bank [Member]
Debt Instrument [Line Items]
Unused Borrowing Capacity under Federal Home Loan Bank and Federal Reserve Bank	$76	$69.70

LongTerm_Debt_Maturities_of_Lo

Long-Term Debt - Maturities of Long-term Debt Outstanding (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule Of Maturities Of Long Term Debt [Line Items]
2015	$4,754
2016	6,343
2017	7,135
2018	3,524
2019	3,488
Thereafter	7,016
Total	32,260	20,049
Parent Company [Member]
Schedule Of Maturities Of Long Term Debt [Line Items]
2015	1,750
2016	1,931
2017	1,248
2018	1,497
2019	1,506
Thereafter	5,257
Total	$13,189	$11,416

Junior_Subordinated_Debentures1

Junior Subordinated Debentures - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2011	Dec. 31, 2013
Debt Instrument [Line Items]
Issuance Trust	USB Capital IX
Debentures Redeemed		$176
Long-term Debt Securities [Member]
Debt Instrument [Line Items]
Debenture amount	500		500
USB Capital IX [Member]
Debt Instrument [Line Items]
Percentage of common equity in wholly owned and sponsored USB Capital IX	100.00%
Value of preferred stock held by unconsolidated trust	676		$676

Shareholders_Equity_Additional

Shareholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2006	Dec. 31, 2014
Class of Stock [Line Items]
Number of common stock shares authorized	4,000,000,000					4,000,000,000
Number of preferred stock shares authorized	50,000,000					50,000,000
Number of common stock shares outstanding	1,800,000,000					1,800,000,000
Number of common stock share for future issuance						91,000,000
Remaining authorized share repurchase amount						$520
Series H [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued	20,000
Liquidation preference per share	$25,000
Preferred stock dividend rate fixed percentage	5.15%
Redemption period of preferred stock	90 days
Preferred stock redemption date	15-Jul-18
Series F [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued		44,000
Liquidation preference per share		$25,000
Preferred stock dividend rate fixed percentage		6.50%
Redemption period of preferred stock		90 days
Preferred stock redemption date		15-Jan-22
Preferred stock dividend rate variable percentage		4.47%
Preferred stock dividend rate period		Three-month LIBOR plus
Series G [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued		43,400
Liquidation preference per share		$25,000
Preferred stock dividend rate fixed percentage		6.00%
Redemption period of preferred stock		90 days
Preferred stock redemption date		15-Apr-17
Preferred stock dividend rate variable percentage		4.86%
Preferred stock dividend rate period		Three-month LIBOR plus
Series A [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued			6,764	5,746
Liquidation preference per share			$100,000	$100,000	$100,000
Preferred stock dividend rate fixed percentage			3.50%	3.50%
Preferred stock dividend rate variable percentage			1.02%	1.02%	1.15%
Preferred stock dividend rate period			Three-month LIBOR plus	Three-month LIBOR plus	Three-month LIBOR plus
Minority interest preferred stock, shares issued					5,000
Series B [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued					40,000
Liquidation preference per share					$25,000
Preferred stock dividend rate fixed percentage					3.50%
Preferred stock dividend rate variable percentage					0.60%
Preferred stock dividend rate period					Three-month LIBOR plus

Shareholders_Equity_Number_of_

Shareholders' Equity - Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Class of Stock [Line Items]
Shares Issued and Outstanding	159,910	159,910
Liquidation Preference	$4,936	$4,936
Discount	180	180
Carrying Amount	4,756	4,756
Series A [Member]
Class of Stock [Line Items]
Shares Issued and Outstanding	12,510	12,510
Liquidation Preference	1,251	1,251
Discount	145	145
Carrying Amount	1,106	1,106
Series B [Member]
Class of Stock [Line Items]
Shares Issued and Outstanding	40,000	40,000
Liquidation Preference	1,000	1,000
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

Shareholders_Equity_Number_of_1

Shareholders' Equity - Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Par value of Preference shares issued and outstanding	$1	$1

Shareholders_Equity_Common_Sto

Shareholders' Equity - Common Stock Repurchased (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Common stock repurchased shares	54	65	59
Purchase of treasury stock	$2,262	$2,336	$1,878

Shareholders_Equity_Reconcilia

Shareholders' Equity - Reconciliation of Transactions Affecting Accumulated Other Comprehensive Income (Loss) Included in Shareholders' Equity (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	($1,071)	($923)	($1,200)
Changes in unrealized gains and losses	764	-1,223	715
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Derivative Hedges	-41	37	-74
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Retirement Plans	-733	590	-543
Changes in unrealized gains and losses	-10	-596	98
Other Gains (Losses)	1	8	12
Foreign currency translation adjustment	-4	-34	14
Reclassification to earnings of realized gains and losses	297	373	325
Applicable income taxes	-109	101	-172
Balance at end of period	-896	-1,071	-923
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	-60	-40	-49
Foreign currency translation adjustment	-4	-34	14
Applicable income taxes	2	14	-5
Balance at end of period	-62	-60	-40
Unrealized Gains (Losses) on Retirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	-743	-1,265	-1,022
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Retirement Plans	-733	590	-543
Reclassification to earnings of realized gains and losses	144	249	150
Applicable income taxes	226	-317	150
Balance at end of period	-1,106	-743	-1,265
Unrealized Gains (Losses) on Derivative Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	-261	-404	-489
Changes in unrealized gains and losses, Unrealized Gains (Losses) on Derivative Hedges	-41	37	-74
Reclassification to earnings of realized gains and losses	186	192	211
Applicable income taxes	-56	-86	-52
Balance at end of period	-172	-261	-404
Unrealized Gains (Losses) on Securities Transferred From Available For Sale to Held To Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	70	107
Transfer of securities from available-for-sale to held-to-maturity			224
Reclassification to earnings of realized gains and losses	-30	-59	-51
Applicable income taxes	12	22	-66
Balance at end of period	52	70	107
Unrealized Gains (Losses) on Securities Available-For-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	-77	679	360
Changes in unrealized gains and losses	764	-1,223	715
Other Gains (Losses)	1	8	12
Transfer of securities from available-for-sale to held-to-maturity			-224
Reclassification to earnings of realized gains and losses	-3	-9	15
Applicable income taxes	-293	468	-199
Balance at end of period	$392	($77)	$679

Shareholders_Equity_Impact_to_

Shareholders' Equity - Impact to Consolidated Statement of Income for Items Reclassified out of Accumulated Other Comprehensive Income and into Earnings (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gains (losses) on sale of securities	$11	$23	$59
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Interest income	12,228	12,285	12,883
Realized gains (losses) on derivative hedges	10,775	10,604	10,745
Actuarial gains (losses), prior service cost (credit) and transition obligation (asset) amortization	-1,041	-1,140	-945
Total securities gains (losses), net	3	9	-15
Applicable income taxes	-2,087	-2,032	-2,236
Net income	5,908	5,732	5,490
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	-183	-229
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	11	23
Other-than-temporary impairment recognized in earnings	-8	-14
Total securities gains (losses), net	3	9
Applicable income taxes	-1	-4
Net income	2	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	30	59
Applicable income taxes	-12	-22
Net income	18	37
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]
Realized gains (losses) on derivative hedges	-186	-192
Applicable income taxes	71	74
Net income	-115	-118
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	-144	-249
Applicable income taxes	56	96
Net income	($88)	($153)

Shareholders_Equity_Components

Shareholders' Equity - Components of Company's Regulatory Capital (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Less intangible assets
Qualifying preferred stock	$4,756	$4,756
Basel III transitional standardized approach/Basel I: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common shareholders' equity	38,723	36,357
Less intangible assets
Goodwill (net of deferred tax liability)	-8,403	-8,343
Other disallowed intangible assets	-165	-708
Other	701	636
Total common equity tier 1 capital	30,856
Qualifying preferred stock	4,756	4,756
Noncontrolling interests eligible for tier 1 capital	408	688
Total tier 1 capital	36,020	33,386
Eligible portion of allowance for credit losses	3,957	3,734
Subordinated debt and noncontrolling interests eligible for tier 2 capital	3,215	2,299
Other	16	-79
Total tier 2 capital	7,188	5,954
Total risk-based capital	43,208	39,340
Risk-weighted assets	317,398	297,919
Basel III transitional advanced approaches: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common shareholders' equity	38,723
Less intangible assets
Goodwill (net of deferred tax liability)	-8,403
Other disallowed intangible assets	-165
Other	701
Total common equity tier 1 capital	30,856
Qualifying preferred stock	4,756
Noncontrolling interests eligible for tier 1 capital	408
Total tier 1 capital	36,020
Eligible portion of allowance for credit losses	1,224
Subordinated debt and noncontrolling interests eligible for tier 2 capital	3,215
Other	16
Total tier 2 capital	4,455
Total risk-based capital	40,475
Risk-weighted assets	$248,596

Earnings_Per_Share_Components_

Earnings Per Share - Components of Earnings Per Share (Detail) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net income attributable to U.S. Bancorp	$5,851	$5,836	$5,647
Preferred dividends	-243	-250	-238
Impact of preferred stock redemption		-8
Earnings allocated to participating stock awards	-25	-26	-26
Net income applicable to U.S. Bancorp common shareholders	$5,583	$5,552	$5,383
Average common shares outstanding	1,803	1,839	1,887
Net effect of the exercise and assumed purchase of stock awards	10	10	9
Average diluted common shares outstanding	1,813	1,849	1,896
Earnings per common share	$3.10	$3.02	$2.85
Diluted earnings per common share	$3.08	$3	$2.84

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail) (Stock Option [Member])	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options outstanding of common shares	5	22

Employee_Benefits_Additional_I

Employee Benefits - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Qualified employees maximum contribution to defined contribution savings plan allowed in percentage of annual compensation	75.00%
Company contribution to defined savings plan	4.00%
Company contribution, percentage company contribution matches of the employee's percentage contribution matched	100.00%
Employee retirement savings plan matching expenses	$122	$118	$111
Vesting service period for defined benefit pension plan	3 years
Plan assets of the qualified pension plans that have asset management arrangements with related parties	70	119
Passive Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	35.00%
Active Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	8.00%
Mid Small Cap Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	7.00%
Emerging Markets Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	5.00%
Real Estate Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	5.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	30.00%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	5.00%
Private Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	5.00%
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to pension and postretirement welfare plan	475	296
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to pension and postretirement welfare plan	21
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to pension and postretirement welfare plan	7	1
Company contributions to pension and postretirement welfare plan	7
Decrease in Postretirement Welfare Plan Benefit Obligation Due To Plan Amendment		($35)

Employee_Benefits_Summary_of_C

Employee Benefits - Summary of Changes in Projected Benefit Obligation, Plan Assets, Funded Status, Amounts Recognized in Consolidated Balance Sheet and Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plans [Member]
Change In Projected Benefit Obligation
Benefit obligation at beginning of measurement period	$3,895	$4,096
Service cost	152	168	129
Interest cost	197	170	168
Actuarial loss (gain)	781	-388
Lump sum settlements	-286	-34
Benefit payments	-127	-117
Benefit obligation at end of measurement period	4,612	3,895	4,096
Change In Fair Value Of Plan Assets
Balance at beginning of period	2,831	2,321
Actual return on plan assets	269	343
Employer contributions	500	318
Lump sum settlements	-286	-34
Benefit payments	-127	-117
Balance at end of period	3,187	2,831	2,321
Funded (Unfunded) Status	-1,425	-1,064
Current benefit liability	-21	-20
Noncurrent benefit liability	-1,404	-1,044
Recognized amount	-1,425	-1,064
Net actuarial gain (loss)	-1,894	-1,333
Net prior service credit (cost)	11	16
Recognized amount	-1,883	-1,317
Postretirement Welfare Plan [Member]
Change In Projected Benefit Obligation
Benefit obligation at beginning of measurement period	100	142
Service cost		3	5
Interest cost	3	4	7
Participants' contributions	11	10
Plan amendments		-35
Actuarial loss (gain)	13	-2
Benefit payments	-25	-24
Federal subsidy on benefits paid	2	2
Benefit obligation at end of measurement period	104	100	142
Change In Fair Value Of Plan Assets
Balance at beginning of period	92	105
Employer contributions	7	1
Participants' contributions	11	10
Benefit payments	-25	-24
Balance at end of period	85	92	105
Funded (Unfunded) Status	-19	-8
Noncurrent benefit liability	-19	-8
Recognized amount	-19	-8
Net actuarial gain (loss)	55	75
Net prior service credit (cost)	31	34
Recognized amount	$86	$109

Employee_Benefits_Summary_of_C1

Employee Benefits - Summary of Changes in Projected Benefit Obligation, Plan Assets, Funded Status, Amounts Recognized in Consolidated Balance Sheet and Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) (Pension Plans [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Payment to deferred vested participants	$242,000,000
Accumulated benefit obligation for all pension plans	$4,300,000,000	$3,600,000,000

Employee_Benefits_Pension_Plan

Employee Benefits - Pension Plans with Benefit Obligations in Excess of Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Pension Plans with Projected Benefit Obligations in Excess of Plan Assets
Projected benefit obligation	$4,612	$3,853
Fair value of plan assets	3,187	2,787
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets
Projected benefit obligation	4,612	3,853
Accumulated benefit obligation	4,250	3,566
Fair value of plan assets	$3,187	$2,787

Employee_Benefits_Components_o

Employee Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plans [Member]
Components Of Net Periodic Benefit Cost
Service cost	$152	$168	$129
Interest cost	197	170	168
Expected return on plan assets	-208	-176	-191
Prior service cost (credit) and transition obligation (asset) amortization	-5	-5	-4
Actuarial loss (gain) amortization	158	264	161
Net periodic benefit cost	294	421	263
Net actuarial gain (loss) arising during the year	-719	555	-567
Net actuarial loss (gain) amortized during the year	158	264	161
Net prior service cost (credit) and transition obligation (asset) amortized during the year	-5	-5	-4
Total recognized in other comprehensive income (loss)	-566	814	-410
Total recognized in net periodic benefit cost and other comprehensive income (loss)	-860	393	-673
Postretirement Welfare Plan [Member]
Components Of Net Periodic Benefit Cost
Service cost		3	5
Interest cost	3	4	7
Expected return on plan assets	-1	-2	-2
Prior service cost (credit) and transition obligation (asset) amortization	-3	-1
Actuarial loss (gain) amortization	-6	-9	-7
Net periodic benefit cost	-7	-5	3
Net actuarial gain (loss) arising during the year	-14		24
Net actuarial loss (gain) amortized during the year	-6	-9	-7
Net prior service credit (cost) arising during the year		35
Net prior service cost (credit) and transition obligation (asset) amortized during the year	-3	-1
Total recognized in other comprehensive income (loss)	-23	25	17
Total recognized in net periodic benefit cost and other comprehensive income (loss)	($16)	$30	$14

Employee_Benefits_Components_o1

Employee Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pre tax Estimated net loss/gain that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost	$235
Pre tax estimated prior service cost for pension plan that will be amortized from accumulated other comprehensive income loss into net periodic benefit cost	-5
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pre tax Estimated net loss/gain that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost	-4
Pre tax estimated prior service cost for pension plan that will be amortized from accumulated other comprehensive income loss into net periodic benefit cost	($3)

Employee_Benefits_Weighted_Ave

Employee Benefits - Weighted Average Assumptions to Determine Projected Benefit Obligations (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Effect on accumulated postretirement benefit obligation
One percent increase	$6	$5
One percent decrease	($5)	($4)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.13%	4.97%
Rate of compensation increase	4.07%	4.02%
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.46%	3.93%
Projected Benefit Obligation Assumptions [Member]
Health care cost trend rate for the next year
Health care cost trend rate assumed for next fiscal year	7.00%	7.50%

Employee_Benefits_Weighted_Ave1

Employee Benefits - Weighted Average Assumptions to Determine Projected Benefit Obligations (Parenthetical) (Detail) (Projected Benefit Obligation Assumptions [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Assumed rate decrease	5.00%
Health care cost trend rate to decrease Period	2019
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	6 years 9 months 18 days	6 years 4 months 24 days
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	15 years 10 months 24 days	14 years 7 months 6 days
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	12 years 4 months 24 days	11 years 6 months

Employee_Benefits_Weighted_Ave2

Employee Benefits - Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Health care cost trend rate
One percent increase	$0	$0	$0
One percent decrease	$0	$0	$0
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.97%	4.07%	5.07%
Expected return on plan assets	7.50%	7.50%	8.00%
Rate of compensation increase	4.02%	4.08%	4.05%
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.93%	3.10%	4.30%
Expected return on plan assets	1.50%	1.50%	2.25%
Prior to Age 65 [Member] | Net Periodic Benefit Cost Assumptions [Member]
Health care cost trend rate
Health care cost trend rate	7.50%	8.00%	8.00%
After Age 65 [Member] | Net Periodic Benefit Cost Assumptions [Member]
Health care cost trend rate
Health care cost trend rate	7.50%	8.00%	12.00%

Employee_Benefits_Weighted_Ave3

Employee Benefits - Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost (Parenthetical) (Detail) (Net Periodic Benefit Cost Assumptions [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	6 years 4 months 24 days	7 years 2 months 12 days
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	14 years 7 months 6 days	15 years 10 months 24 days
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	11 years 6 months	12 years 2 months 12 days
Prior to Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed rate decrease	5.00%
Health care cost trend rate to decrease Period	2019
After Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed rate decrease	5.00%
Health care cost trend rate to decrease Period	2019

Employee_Benefits_Summary_of_P

Employee Benefits - Summary of Plan Investment Assets Measured at Fair Value (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Level 3 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value			$7	$7
Level 3 [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	148	103
Level 3 [Member] | Private Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	25
Level 3 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	2	4	3	6
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	3,187	2,831	2,321
Pension Plans [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	1,127	1,010
Pension Plans [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	78	62
Pension Plans [Member] | Level 1 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	347	217
Pension Plans [Member] | Level 1 [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	196	217
Pension Plans [Member] | Level 1 [Member] | Mid Small Cap Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	146	148
Pension Plans [Member] | Level 1 [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	197	229
Pension Plans [Member] | Level 1 [Member] | Real Estate Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	163	137
Pension Plans [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	1,885	1,714
Pension Plans [Member] | Level 2 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	496	343
Pension Plans [Member] | Level 2 [Member] | Collective Investment Funds Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	539	538
Pension Plans [Member] | Level 2 [Member] | Collective Investment Fund Mid-Small Cap Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	54	58
Pension Plans [Member] | Level 2 [Member] | Collective Investment Fund Emerging Markets Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	75	58
Pension Plans [Member] | Level 2 [Member] | Collective Investment Funds International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	421	472
Pension Plans [Member] | Level 2 [Member] | Debt Securities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	219	177
Pension Plans [Member] | Level 2 [Member] | Emerging Markets Equity Mutual Fund Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	81	75
Pension Plans [Member] | Level 2 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value		-7
Pension Plans [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	175	107
Pension Plans [Member] | Level 3 [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	148	103
Pension Plans [Member] | Level 3 [Member] | Private Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	25
Pension Plans [Member] | Level 3 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	2	4
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	85	92	105
Postretirement Welfare Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	85	92
Postretirement Welfare Plan [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	$85	$92

Employee_Benefits_Summary_of_P1

Employee Benefits - Summary of Plan Investment Assets Measured at Fair Value (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Level 1 [Member] | Mid Small Cap Equity Securities [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	$141	$141
Level 1 [Member] | Mid Small Cap Equity Securities [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	5	7
Level 1 [Member] | Real Estate Equity Securities [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	89	67
Level 1 [Member] | Real Estate Equity Securities [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	74	70
Level 2 [Member] | Collective Investment Fund Mid-Small Cap Equity Securities [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	25	26
Level 2 [Member] | Collective Investment Fund Mid-Small Cap Equity Securities [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	27	22
Level 2 [Member] | Collective Investment Fund Mid-Small Cap Equity Securities [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	$2	$10

Employee_Benefits_Summarizes_C

Employee Benefits - Summarizes Changes for All Plan investment Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) (Level 3 [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of period	$103
Unrealized gains (losses) relating to assets still held at end of year	7
Purchases, sales, and settlements, net	38	103
Balance at end of period	148	103
Private Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrealized gains (losses) relating to assets still held at end of year	-2
Purchases, sales, and settlements, net	27
Balance at end of period	25
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of period	4	3	6
Unrealized gains (losses) relating to assets still held at end of year	-2		-2
Purchases, sales, and settlements, net		1	-1
Balance at end of period	2	4	3
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of period		7	7
Unrealized gains (losses) relating to assets still held at end of year			1
Purchases, sales, and settlements, net		-7	-1
Balance at end of period			$7

Employee_Benefits_Expected_Fut

Employee Benefits - Expected Future Benefit Payments (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$177
2016	188
2017	197
2018	207
2019	214
2020 - 2024	1,259
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	14
2016	13
2017	12
2018	12
2019	11
2020 - 2024	44
Medicare Part D Subsidy [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	2
2016	2
2017	2
2018	2
2019	2
2020 - 2024	$9

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Date of grant exercisable period	10 years
Shares available for grant under various plans (subject to adjustment for forfeitures)	50
Fair value of shares vested	$139	$127	$86
Stock-based compensation expense	125	129	129
Stock-based compensation on an after tax basis	78	80	80
Unrecognized compensation cost related to nonvested share-based arrangements granted under plans	$167
Cost expected to be recognized over a weighted-average period as compensation expense	2 years 4 months 24 days
Minimum [Member]
Stock and unit awards vesting period	3 years
Maximum [Member]
Stock and unit awards vesting period	5 years

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Stock Options Outstanding and Exercised Under Prior and Existing Stock Incentive Plans (Detail) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Exercise Price, and Additional Disclosures [Abstract]
Stock Options/Shares, Outstanding at Beginning of the Period	46,724,765	63,171,918	75,823,941
Stock Options/Shares, Granted	1,246,451	1,168,011	4,180,492
Stock Options/Shares, Exercised	-13,851,590	-17,260,740	-15,681,323
Stock Options/Shares, Cancelled	-470,428	-354,424	-1,151,192
Stock Options/Shares, Outstanding at End of the Period	33,649,198	46,724,765	63,171,918
Stock Options/Shares, Exercisable at End of Period	28,923,260	39,556,000	50,671,654
Weighted-Average Exercise Price, Outstanding at Beginning of the Period	$29.12	$28.83	$27.60
Weighted-Average Exercise Price, Granted	$40.32	$33.99	$28.65
Weighted-Average Exercise Price, Exercised	$29.59	$28.41	$23.12
Weighted-Average Exercise Price, Cancelled	$31.12	$29.22	$24.90
Weighted-Average Exercise Price, Outstanding at End of the Period	$29.31	$29.12	$28.83
Weighted-Average Exercise Price, Exercisable at End of Period	$28.79	$29.19	$30.12
Weighted Average Remaining Contractual Term, Outstanding at the End of the Period	4 years	4 years 4 months 24 days	4 years 10 months 24 days
Weighted Average Remaining Contractual Term, Exercisable at End of Period	3 years 4 months 24 days	3 years 9 months 18 days	4 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding at the End of the Period	$526	$527	$196
Aggregate Intrinsic Value, Exercisable at End of Period	$467	$444	$92

StockBased_Compensation_Weight

Stock-Based Compensation - Weighted Average Estimated Fair Value of Stock Option Granted and Assumptions Utilized by Company for Newly Issued Grants (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Estimated fair value	$11.38	$12.13	$10.19
Risk-free interest rates	1.70%	1.00%	0.90%
Dividend yield	2.60%	2.60%	2.60%
Stock volatility factor	0.38%	0.49%	0.49%
Expected life of options (in years)	5 years 6 months	5 years 6 months	5 years 6 months

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Certain Stock Option Activity (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Fair value of options vested	$33	$41	$49
Intrinsic value of options exercised	171	144	143
Cash received from options exercised	408	489	362
Tax benefit realized from options exercised	$66	$56	$75

StockBased_Compensation_Stock_

Stock-Based Compensation - Stock Options Outstanding Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Options, Shares	33,649,198
Outstanding Options, Weighted average remaining contractual Life (Years)	4 years
Outstanding Options, Weighted Average Exercise Price	$29.31
Exercisable Options, Shares	28,923,260
Exercisable Options, Weighted Average Exercise Price	$28.79
Exercise Prices Range $11.02-$15.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$11.02
Upper range limit of Exercise Prices	$15
Outstanding Options, Shares	3,366,770
Outstanding Options, Weighted average remaining contractual Life (Years)	4 years 1 month 6 days
Outstanding Options, Weighted Average Exercise Price	$11.33
Exercisable Options, Shares	3,366,770
Exercisable Options, Weighted Average Exercise Price	$11.33
Exercise Prices Range $15.01-$20.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$15.01
Upper range limit of Exercise Prices	$20
Outstanding Options, Shares	161,742
Outstanding Options, Weighted average remaining contractual Life (Years)	1 year 3 months 18 days
Outstanding Options, Weighted Average Exercise Price	$19.57
Exercisable Options, Shares	161,742
Exercisable Options, Weighted Average Exercise Price	$19.57
Exercise Prices Range $20.01-$25.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$20.01
Upper range limit of Exercise Prices	$25
Outstanding Options, Shares	2,513,347
Outstanding Options, Weighted average remaining contractual Life (Years)	5 years 1 month 6 days
Outstanding Options, Weighted Average Exercise Price	$23.85
Exercisable Options, Shares	2,505,271
Exercisable Options, Weighted Average Exercise Price	$23.84
Exercise Prices Range $25.01-$30.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$25.01
Upper range limit of Exercise Prices	$30
Outstanding Options, Shares	9,825,343
Outstanding Options, Weighted average remaining contractual Life (Years)	4 years 7 months 6 days
Outstanding Options, Weighted Average Exercise Price	$28.95
Exercisable Options, Shares	7,101,828
Exercisable Options, Weighted Average Exercise Price	$29.06
Exercise Prices Range $30.01-$35.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$30.01
Upper range limit of Exercise Prices	$35
Outstanding Options, Shares	11,611,190
Outstanding Options, Weighted average remaining contractual Life (Years)	3 years 4 months 24 days
Outstanding Options, Weighted Average Exercise Price	$32.13
Exercisable Options, Shares	10,798,653
Exercisable Options, Weighted Average Exercise Price	$31.99
Exercise Prices Range $35.01-$40.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$35.01
Upper range limit of Exercise Prices	$40
Outstanding Options, Shares	4,988,996
Outstanding Options, Weighted average remaining contractual Life (Years)	2 years 1 month 6 days
Outstanding Options, Weighted Average Exercise Price	$36.04
Exercisable Options, Shares	4,988,996
Exercisable Options, Weighted Average Exercise Price	$36.04
Exercise Prices Range $40.01-$41.61 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	$40.01
Upper range limit of Exercise Prices	$41.61
Outstanding Options, Shares	1,181,810
Outstanding Options, Weighted average remaining contractual Life (Years)	9 years 1 month 6 days
Outstanding Options, Weighted Average Exercise Price	$40.32

StockBased_Compensation_Summar2

Stock-Based Compensation - Summary of Company's Restricted Shares of Stock and Unit Awards (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Of Shares And Weighted Average Grant Date Fair Value [Abstract]
Outstanding at beginning of period, shares	8,653,859	8,935,743	8,995,295
Granted, shares	3,133,168	3,717,635	3,085,077
Vested, shares	-3,409,650	-3,744,411	-2,931,820
Cancelled, shares	-455,806	-255,108	-212,809
Outstanding at end of period, shares	7,921,571	8,653,859	8,935,743
Outstanding at beginning of period, weighted average grant-date fair value	$29.96	$25.04	$22.46
Granted, weighted average grant-date fair value	$40.37	$33.88	$28.70
Vested, weighted average grant-date fair value	$29.38	$22.17	$20.97
Cancelled, weighted average grant-date fair value	$34.05	$29.18	$25.01
Outstanding at end of period, weighted average grant-date fair value	$34.09	$29.96	$25.04

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Federal
Current	$1,888	$1,885	$1,853
Deferred	-126	-83	45
Federal income tax	1,762	1,802	1,898
State
Current	331	216	334
Deferred	-6	14	4
State income tax	325	230	338
Applicable income taxes	$2,087	$2,032	$2,236

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes Additional Information [Abstract]
Federal statutory rate	35.00%
Unrecognized tax positions that would impact the effective tax rate	$192	$181	$240
Unrecognized tax positions as a component of income taxes expense, accrued interest	31
Unrecognized tax positions as a component of income tax expense, recorded in interest	4	-12	-8
Federal, state and foreign net operating loss carryforwards	921
Federal, state and foreign net operating loss carryforwards expiration term	31-Dec-34
Base year reserves included in retained earnings of acquired thrift institutions	$102

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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate	$2,798	$2,717	$2,704
State income tax, at statutory rates, net of federal tax benefit	211	150	220
Tax credits and benefits, net of related expenses	-701	-648	-479
Tax-exempt income	-205	-212	-219
Noncontrolling interests	-20	37	55
Other items	4	-12	-45
Applicable income taxes	$2,087	$2,032	$2,236

Income_Taxes_Reconciliation_of1

Income Taxes - Reconciliation of Changes in Federal, State and Foreign Unrecognized Tax Position Balances (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Uncertainties [Abstract]
Balance at beginning of period	$264	$302	$479
Additions for tax positions taken in prior years	31	44	73
Additions for tax positions taken in the current year	4		5
Exam resolutions	-22	-56	-245
Statute expirations	-10	-26	-10
Balance at end of period	$267	$264	$302

Income_Taxes_Significant_Compo

Income Taxes - Significant Components of the Company's Net Deferred Tax Asset (Liability) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Deferred Tax Assets
Allowance for credit losses	$1,652	$1,722
Accrued expenses	630	485
Pension and postretirement benefits	437	277
Federal, state and foreign net operating loss carryforwards	212	72
Stock compensation	143	165
Securities available-for-sale and financial instruments		172
Partnerships and other investment assets	403	646
Other deferred tax assets, net	208	179
Gross deferred tax assets	3,685	3,718
Deferred Tax Liabilities
Leasing activities	-3,042	-2,872
Mortgage servicing rights	-871	-835
Goodwill and other intangible assets	-772	-666
Loans	-212	-211
Securities available-for-sale and financial instruments	-165
Fixed assets	-90	-147
Other deferred tax liabilities, net	-159	-210
Gross deferred tax liabilities	-5,311	-4,941
Valuation allowance	-101	-82
Net Deferred Tax Asset (Liability)	($1,727)	($1,305)

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Realized and unrealized losses on derivatives classified as cash flow hedges recorded in other comprehensive income (loss)		$172,000,000	$261,000,000
Forward commitments to sell mortgage loans		7,200,000,000
Hedged mortgage loans held for sale		3,900,000,000
Unfunded mortgage loan commitments		4,300,000,000
Fair value of derivatives under collateral agreements in a net liability position		964,000,000
Collateral posted by company netted against net liability position		842,000,000
Up Scenario [Member] | Net sensitivity [Member]
Derivative [Line Items]
Net fair value 25 basis points		-2,000,000
Net fair value 50 basis points		-12,000,000	-3,000,000
Net fair value 100 basis points		-29,000,000	-14,000,000
Down Scenario [Member] | Net sensitivity [Member]
Derivative [Line Items]
Net fair value 25 basis points		-5,000,000	-2,000,000
Net fair value 50 basis points		-19,000,000	-5,000,000
Net fair value 100 basis points		-99,000,000	-36,000,000
Scenario, Forecast [Member]
Derivative [Line Items]
Estimated loss to be reclassified from other comprehensive income (loss) into earnings	$115,000,000

Derivative_Instruments_Asset_a

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Detail) (Asset and Liability Management Positions [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Notional Value, Assets	$20,217	$28,119
Fair Value, Assets	215	189
Notional Value, Liabilities	21,623	14,730
Fair Value, Liabilities	472	580
Fair Value Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	2,750	500
Fair Value, Assets	65	22
Derivative Asset Average Remaining Maturity Period	5 years 8 months 9 days	2 years 1 month 2 days
Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	250	7,000
Fair Value, Assets		26
Derivative Asset Average Remaining Maturity Period	1 month 28 days	10 months 2 days
Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	272	772
Fair Value, Assets	6	26
Derivative Asset Average Remaining Maturity Period	7 years 9 months 4 days	6 years 3 months
Notional Value, Liabilities	5,748	4,288
Fair Value, Liabilities	315	498
Derivative Liability Average Remaining Maturity Period	1 year 11 months 9 days	2 years 5 months 16 days
Net Investment Hedges [Member] | Foreign Exchange Forward Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	1,047
Fair Value, Assets	31
Derivative Asset Average Remaining Maturity Period	15 days
Notional Value, Liabilities		1,056
Fair Value, Liabilities		4
Derivative Liability Average Remaining Maturity Period		15 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	3,552
Fair Value, Assets	14
Derivative Asset Average Remaining Maturity Period	10 years 2 months 19 days
Notional Value, Liabilities	250	3,540
Fair Value, Liabilities	1	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	15
Derivative Asset 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	4,839	2,310
Fair Value, Assets	45	9
Derivative Asset Average Remaining Maturity Period	26 days	26 days
Notional Value, Liabilities	60	1,025
Fair Value, Liabilities		7
Derivative Liability Average Remaining Maturity Period	29 days	22 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	448	5,234
Fair Value, Assets	10	58
Derivative Asset Average Remaining Maturity Period	1 month 17 days	29 days
Notional Value, Liabilities	6,713	346
Fair Value, Liabilities	62	4
Derivative Liability Average Remaining Maturity Period	1 month 2 days	2 months 1 day
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	2,500	2,300
Derivative Asset Average Remaining Maturity Period	22 days	26 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	2,643	1,902
Fair Value, Assets	31	17
Derivative Asset Average Remaining Maturity Period	29 days	26 days
Notional Value, Liabilities	4	2
Derivative Liability Average Remaining Maturity Period	1 month 10 days	29 days
Other Economic Hedges [Member] | Foreign Exchange Forward Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	510	6,813
Fair Value, Assets	3	24
Derivative Asset Average Remaining Maturity Period	11 days	7 days
Notional Value, Liabilities	6,176	2,121
Fair Value, Liabilities	41	4
Derivative Liability Average Remaining Maturity Period	7 days	7 days
Other Economic Hedges [Member] | Equity Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	86	79
Fair Value, Assets	3	3
Derivative Asset Average Remaining Maturity Period	7 months 6 days	1 year 7 months 13 days
Other Economic Hedges [Member] | Credit Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	1,247	1,209
Fair Value, Assets	3	4
Derivative Asset Average Remaining Maturity Period	3 years 3 months 15 days	4 years 15 days
Notional Value, Liabilities	2,282	2,352
Fair Value, Liabilities	5	7
Derivative Liability Average Remaining Maturity Period	2 years 10 months 6 days	3 years 29 days
Other Derivatives [Member]
Derivative [Line Items]
Notional Value, Assets	58
Fair Value, Assets	4
Derivative Asset Average Remaining Maturity Period	11 days
Notional Value, Liabilities	390
Fair Value, Liabilities	$48
Derivative Liability Average Remaining Maturity Period	3 years 2 months 12 days

Derivative_Instruments_Asset_a1

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Parenthetical) (Detail) (Asset and Liability Management Positions [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Notional Value, Liabilities	$21,623	$14,730
Fair Value, Liabilities	472	580
Notional Value, Assets	20,217	28,119
Underwriting Purchase and Sale Commitments [Member]
Derivative [Line Items]
Notional Value, Liabilities	58
Notional Value, Assets	58
Swap [Member] | Visa Class B [Member]
Derivative [Line Items]
Notional Value, Liabilities	332
Fair Value, Liabilities	$44
Derivative Liability Average Remaining Maturity Period	3 years 9 months

Derivative_Instruments_Custome

Derivative Instruments - Customer-Related Derivative Positions of Company (Detail) (Customer-Related Positions [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Notional Value, Assets	$50,780	$33,286
Fair Value, Assets	1,853	1,215
Notional Value, Liabilities	47,993	33,480
Fair Value, Liabilities	1,717	1,137
Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	21,724	11,717
Fair Value, Assets	888	600
Derivative Asset Average Remaining Maturity Period	6 years 1 month 2 days	5 years 1 month 10 days
Notional Value, Liabilities	5,880	7,291
Fair Value, Liabilities	24	106
Derivative Liability Average Remaining Maturity Period	3 years 9 months 15 days	5 years 6 months 26 days
Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	4,622	6,746
Fair Value, Assets	26	114
Derivative Asset Average Remaining Maturity Period	3 years 3 months 7 days	6 years 11 days
Notional Value, Liabilities	21,821	12,361
Fair Value, Liabilities	892	560
Derivative Liability Average Remaining Maturity Period	6 years 29 days	4 years 10 months 24 days
Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	4,409	3,489
Fair Value, Assets	10	33
Derivative Asset Average Remaining Maturity Period	3 years 9 months 15 days	4 years 6 months 11 days
Notional Value, Liabilities	24
Derivative Liability Average Remaining Maturity Period	2 years 5 months 1 day
Interest Rate Contracts [Member] | Options [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	24
Derivative Asset Average Remaining Maturity Period	2 years 5 months 1 day
Notional Value, Liabilities	4,375	3,489
Fair Value, Liabilities	10	33
Derivative Liability Average Remaining Maturity Period	3 years 9 months 15 days	4 years 6 months 11 days
Interest Rate Contracts [Member] | Futures [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	1,811
Derivative Asset Average Remaining Maturity Period	2 months 19 days
Notional Value, Liabilities	226
Derivative Liability Average Remaining Maturity Period	5 months 12 days
Interest Rate Contracts [Member] | Futures [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	152
Derivative Asset Average Remaining Maturity Period	1 year 29 days
Notional Value, Liabilities	46
Derivative Liability Average Remaining Maturity Period	1 year 8 months 23 days
Foreign Exchange Rate Contracts [Member] | Forwards, Spots and Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	17,062	10,970
Fair Value, Assets	890	457
Derivative Asset Average Remaining Maturity Period	6 months 7 days	7 months 2 days
Notional Value, Liabilities	14,645	9,975
Fair Value, Liabilities	752	427
Derivative Liability Average Remaining Maturity Period	7 months 2 days	7 months 13 days
Foreign Exchange Option [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	976	364
Fair Value, Assets	39	11
Derivative Asset Average Remaining Maturity Period	5 months 9 days	6 months 11 days
Foreign Exchange Option [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Liabilities	976	364
Fair Value, Liabilities	$39	$11
Derivative Liability Average Remaining Maturity Period	5 months 9 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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
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	($26)	$25	($46)
Derivative Instruments, Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	-115	-118	-131
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	130	-45	-19
Net Investment Hedges [Member] | Non-Derivative Debt Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Losses) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net			$20

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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Asset and Liability Management Positions [Member] | Other Noninterest Income/Expense [Member] | Other Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	($43)
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	29	-9	3
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	-122	615	437
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	287	243	854
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	384	-322	175
Asset and Liability Management Positions [Member] | Foreign Exchange Cross-Currency Swaps [Member] | Other Noninterest Income [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings			42
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	-29	49	-63
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	2	2	2
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		6	-8
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	686	-361	-118
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	-652	378	124
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	66	51	50
Customer-Related Positions [Member] | Foreign Exchange Rate Contracts [Member] | Commercial Products Revenue [Member] | Purchased and Written Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	$1

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], Fair Value Hedges [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain losses on items hedged by fair value hedges	($27)	$8	($3)
Foreign Exchange Cross-Currency Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain losses on items hedged by fair value hedges			($44)

Netting_Arrangements_for_Certa2

Netting Arrangements for Certain Financial Instruments - Additional Information (Detail) (USD $)	Dec. 31, 2014
In Billions, unless otherwise specified
Derivative [Line Items]
Notional amount of derivative	$140.60
Exchange Cleared [Member]
Derivative [Line Items]
Notional amount of derivative	33
Exchange Traded [Member]
Derivative [Line Items]
Notional amount of derivative	$4.20

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 $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]
Derivative assets Gross Recognized Assets	$1,847	$1,349
Reverse repurchase agreements Gross Recognized Assets	40	87
Securities borrowed Gross Recognized Assets	638	723
Total Gross Recognized Assets	2,525	2,159
Derivative assets Gross amounts assets offset in consolidated balance sheet	-870	-599
Total Gross amounts assets offset in consolidated balance sheet	-870	-599
Derivative assets Net Amounts Presented in the Consolidated Balance Sheet	977	750
Reverse repurchase agreements Net Amounts Presented in the Consolidated Balance Sheet	40	87
Securities borrowed Net Amounts Presented in the Consolidated Balance Sheet	638	723
Total Net Amounts Presented in the Consolidated Balance Sheet	1,655	1,560
Derivative assets Gross Amounts Not Offset Consolidated Balance Financial Instruments	-58	-21
Reverse repurchase agreements Gross financial instrument asset amounts not offset in consolidated balance sheet	-40	-59
Securities borrowed Gross financial instrument asset amounts not offset in consolidated balance sheet	0	0
Total Gross financial instrument asset amounts not offset in consolidated balance sheet	-98	-80
Reverse repurchase agreements Gross collateral received amounts not offset in consolidated balance sheet		-28
Securities borrowed Gross collateral received amounts not offset in consolidated balance sheet	-620	-698
Total Gross collateral received amounts not offset in consolidated balance sheet	-620	-726
Derivative assets Net Amount	919	729
Reverse repurchase agreements Net Amount	0	0
Securities borrowed Net Amount	18	25
Total Net Amount Assets	937	754
Derivative liabilities Gross recognized liabilities	1,847	1,598
Repurchase agreements Gross recognized liabilities	948	2,059
Securities loaned Gross recognized liabilities	47
Total Gross recognized liabilities	2,842	3,657
Derivative liabilities Gross amounts liabilities offset in consolidated balance sheet	-1,317	-1,192
Total Gross amounts liabilities offset in consolidated balance sheet	-1,317	-1,192
Derivative liabilities Net amounts liabilities presented in consolidated balance sheet	530	406
Repurchase agreements Net amounts liabilities presented in consolidated balance sheet	948	2,059
Securities loaned Net amounts liabilities presented in consolidated balance sheet	47
Total Net amounts liabilities presented in consolidated balance sheet	1,525	2,465
Derivative liabilities Gross financial instrument liability amounts not offset in consolidated balance sheet	-58	-21
Repurchase agreements Gross financial instrument liability amounts not offset in consolidated balance sheet	-40	-59
Securities loaned Gross financial instruments not offset in consolidated balance sheet	0	0
Total Gross financial instrument liability amounts not offset in consolidated balance sheet	-98	-80
Repurchase agreements Gross collateral pledged amounts not offset in consolidated balance sheet	-908	-2,000
Securities loaned Gross collateral pledged amounts not offset in consolidated balance sheet	-46
Total Gross collateral pledged amounts not offset in consolidated balance sheet	-954	-2,000
Derivative liabilities Net Amount	472	385
Repurchase agreements Net Amount	0	0
Securities loaned net amount	1
Total Net Amount Liabilities	$473	$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 $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]
Cash collateral netted against derivative assets	$258	$124
Derivative assets not subject to netting arrangements	221	55
Cash collateral netted against derivative liabilities	705	717
Derivative liabilities not subject to netting arrangements	$342	$119

Fair_Values_of_Assets_and_Liab2

Fair Values of Assets and Liabilities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Fair value measurement transfers from one level to another	$0	$0	$0
Mortgage loans held for sale measured at fair value gain (loss)	185,000,000	-335,000,000	287,000,000
Standby Letters Of Credit, Unfunded Commitments and Deferred Non-Yield Loan Fees [Member]
Fair Value Disclosures [Abstract]
Carrying value of guarantee obligations	413,000,000	382,000,000
Other Guarantees [Member]
Fair Value Disclosures [Abstract]
Carrying value of guarantee obligations	$211,000,000	$278,000,000
Minimum [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of underlying fair value of underlying derivative contracts	0.00%
Maximum [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of underlying fair value of underlying derivative contracts	97.00%
Average [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of underlying fair value of underlying derivative contracts	6.00%

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])	12 Months Ended
	Dec. 31, 2014
Minimum [Member] | Non-Agency Prime [Member] | Mortgage-Backed Securities Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated lifetime prepayment rates	6.00%
Lifetime 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	22.00%
Lifetime probability of default rates	7.00%
Lifetime loss severity rates	60.00%
Discount margin	5.00%
Maximum [Member] | Non-Agency Non-Prime [Member] | Mortgage-Backed Securities Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated lifetime prepayment rates	10.00%
Lifetime probability of default rates	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	34.00%
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	7.00%
Lifetime probability of default rates	7.00%
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])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	12.10%	11.20%
Discount rate	10.10%	10.20%
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	11.00%
Discount rate	9.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	21.00%
Discount rate	13.00%
Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	12.00%
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])	Dec. 31, 2014
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected loan close rate	38.00%
Inherent MSR value (basis points per loan)	45.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected loan close rate	100.00%
Inherent MSR value (basis points per loan)	203.00%
Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected loan close rate	76.00%
Inherent MSR value (basis points per loan)	129.00%

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 $)	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities netting	($1,317)		($1,192)
Derivative liabilities total	530		406
Derivative assets netting	-870		-599
Derivative assets total	977		750
Available-for-sale securities	56,069	[1]	40,935	[1]
Mortgage loans held for sale	4,774		3,263
Mortgage servicing rights	2,338		2,680		1,700	1,519
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities total	872		525
Derivative assets total	1,198		805
Available-for-sale securities	56,069		40,935
Mortgage loans held for sale	4,774		3,263
Mortgage servicing rights	2,338		2,680
Other assets	872		731
Total	65,251		48,414
Short-term borrowings	709		663
Total	1,581		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	2,632		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	5,868		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	614		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	217		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	274		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	405		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	280		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	45,017		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	115		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	619		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	22		24
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,758		148
Other assets	231		143
Total	1,989		291
Short-term borrowings	101		112
Total	101		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	1,351		7
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	101
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	55
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	251		141
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	2,103		1,647
Derivative assets before netting	1,408		889
Available-for-sale securities	53,555		39,940
Mortgage loans held for sale	4,774		3,263
Other assets	641		588
Total	60,378		44,680
Short-term borrowings	608		551
Total	2,711		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	1,281		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	5,868		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	504		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	162		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	23		20
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	45,017		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	115		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	557		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	22		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	86		70
Derivative assets before netting	660		515
Available-for-sale securities	756		847
Mortgage servicing rights	2,338		2,680
Total	3,754		4,042
Total	86		70
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] | 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	405		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	280		297
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	62		63
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	-1,317		-1,192
Derivative assets netting	-870		-599
Total	-870		-599
Total	($1,317)		($1,192)
[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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Non-Agency Prime [Member] | Mortgage-Backed Securities Residential [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	$478	$624	$803
Net Gains (Losses) Included in Net Income		-6	-10
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	15	8	91
Purchases
Sales			-109
Principal Payments	-88	-148	-151
Issuances
Settlements
End of Period Balance	405	478	624
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	14	9	65
Non-Agency Non-Prime [Member] | Mortgage-Backed Securities Residential [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	297	355	802
Net Gains (Losses) Included in Net Income	-6	-13	-24
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	19	17	228
Purchases
Sales		-20	-562
Principal Payments	-30	-42	-89
Issuances
Settlements
End of Period Balance	280	297	355
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	19	17	80
Asset-Backed Securities Other [Member] | Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	63	15	117
Net Gains (Losses) Included in Net Income	4	3	7
Net Gains (Losses) Included in Other Comprehensive Income (Loss)		1
Purchases	5	51	3
Sales			-93
Principal Payments	-10	-7	-19
Issuances
Settlements
End of Period Balance	62	63	15
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period			2
Corporate Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	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
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period
Non-agency [Member] | Commercial [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance			42
Net Gains (Losses) Included in Net Income			1
Net Gains (Losses) Included in Other Comprehensive Income (Loss)
Purchases
Sales			-38
Principal Payments			-5
Issuances
Settlements
End of Period Balance
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period
Collateralized Loan Obligations [Member] | Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance			120
Net Gains (Losses) Included in Net Income			13
Net Gains (Losses) Included in Other Comprehensive Income (Loss)			-8
Purchases
Sales			-104
Principal Payments			-21
Issuances
Settlements
End of Period Balance
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period
Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	2,680	1,700	1,519
Net Gains (Losses) Included in Net Income	-588	203	-818
Net Gains (Losses) Included in Other Comprehensive Income (Loss)
Purchases	5	8	42
Sales	-141
Principal Payments
Issuances	382	769	957
Settlements
End of Period Balance	2,338	2,680	1,700
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	-588	203	-818
Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	445	1,179	1,228
Net Gains (Losses) Included in Net Income	904	-18	2,398
Net Gains (Losses) Included in Other Comprehensive Income (Loss)
Purchases	1	1	3
Sales	-4	-5	-5
Principal Payments
Issuances
Settlements	-772	-712	-2,445
End of Period Balance	574	445	1,179
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	188	-321	150
Available-for-Sale Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	847	1,003	1,893
Net Gains (Losses) Included in Net Income	-2	-16	-13
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	34	26	311
Purchases	5	51	3
Sales		-20	-906
Principal Payments	-128	-197	-285
Issuances
Settlements
End of Period Balance	756	847	1,003
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Still Held at End of Period	$33	$26	$147

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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
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	$404	($149)	$359
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	128	-340	-109
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	500	131	2,000
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	60	19	259
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	-14	-47
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)	$34

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 $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$77	$128
Other assets	90	150
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	77	128
Other assets	$90	$150

Recovered_Sheet14

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 $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loans Receivable [Member]
Fair Value Assets Measured On Nonrecurring Basis Losses Recognized [Line Items]
Asset impairment charges	$108	$83	$68
Other Assets [Member]
Fair Value Assets Measured On Nonrecurring Basis Losses Recognized [Line Items]
Asset impairment charges	$70	$96	$160

Recovered_Sheet15

Fair Values of Assets and Liabilities - Differences Between Aggregate Fair Value, Carrying Amount of MLHFS and Aggregate Unpaid Principal Amount (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]
Fair value carrying amount, total loans	$4,774	$3,263
Fair value carrying amount, nonaccrual loans	6	9
Fair value carrying amount, loans 90 days or more past due	1
Aggregate unpaid principal, total loans	4,582	3,195
Aggregate unpaid principal, nonaccrual loans	9	14
Aggregate unpaid principal, loans 90 days or more past due	1
Carrying amount over (under) unpaid principal, total loans	192	68
Carrying amount over (under) unpaid principal, nonaccrual loans	-3	-5
Carrying amount over (under) unpaid principal, loans 90 days or more past due	$0	$0

Recovered_Sheet16

Fair Values of Assets and Liabilities - Estimated Fair Values of Financial Instruments (Detail) (USD $)	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Financial Assets
Cash and due from banks	$10,654		$8,477		$8,252	$13,962
Investment securities held-to-maturity	44,974	[1]	38,920	[1]
Financial Liabilities
Deposits	282,733		262,123
Long-term debt	32,260		20,049
Carrying Amount [Member]
Financial Assets
Cash and due from banks	10,654		8,477
Federal funds sold and securities purchased under resale agreements	118		163
Investment securities held-to-maturity	44,974		38,920
Loans held for sale	18		5
Loans	243,735		230,857
Other financial instruments	2,187		2,443
Financial Liabilities
Deposits	282,733		262,123
Short-term borrowings	29,184		26,945
Long-term debt	32,260		20,049
Other Liabilities	1,231		1,263
Fair Value [Member]
Financial Assets
Cash and due from banks	10,654		8,477
Federal funds sold and securities purchased under resale agreements	118		163
Investment securities held-to-maturity	45,140		38,368
Loans held for sale	18		5
Loans	245,424		231,480
Other financial instruments	2,193		2,463
Financial Liabilities
Deposits	282,708		262,200
Short-term borrowings	28,973		26,863
Long-term debt	32,659		20,391
Other Liabilities	1,231		1,263
Fair Value [Member] | Level 1 [Member]
Financial Assets
Cash and due from banks	10,654		8,477
Investment securities held-to-maturity	1,928		2,589
Fair Value [Member] | Level 2 [Member]
Financial Assets
Federal funds sold and securities purchased under resale agreements	118		163
Investment securities held-to-maturity	43,124		35,678
Other financial instruments	924		1,080
Financial Liabilities
Deposits	282,708		262,200
Short-term borrowings	28,973		26,863
Long-term debt	32,659		20,391
Fair Value [Member] | Level 3 [Member]
Financial Assets
Investment securities held-to-maturity	88		101
Loans held for sale	18		5
Loans	245,424		231,480
Other financial instruments	1,269		1,383
Financial Liabilities
Other Liabilities	$1,231		$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 $)	12 Months Ended
Share data in Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Guarantees And Contingent Liabilities (Textual) [Abstract]
Liability related to remaining Visa Litigation, carrying amount	$19,000,000
Rental expense for operating leases	326,000,000	311,000,000	295,000,000
Representation and warranty reserve	46,000,000	83,000,000	240,000,000	160,000,000
Standby Letters of Credit [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	14,838,000,000
Weighted-average term of potential future payments guaranteed under standby letter of credit arrangements	21 months
Carrying Amount	58,000,000
Collateral held
Third-Party Borrowing Arrangements [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	10,000,000
Carrying Amount
Collateral held
Securities Lending Indemnifications [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	4,514,000,000
Carrying Amount
Collateral held	4,649,000,000
Asset Sales [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	4,271,000,000
Carrying Amount	145,000,000
Collateral held
Reserve for potential losses related to sale or syndication of tax-advantage investments	99,000,000
Representation and warranty reserve	46,000,000	83,000,000
Unresolved representation and warranty claims	19,000,000	89,000,000
Merchant Processing [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	89,652,000,000
Carrying Amount	58,000,000
Collateral held	522,000,000
Value of airline tickets purchased to deliver at future date	5,200,000,000
Company held collateral in escrow deposits, letters of credit and indemnities from financial institutions and liens on various assets	429,000,000
Company held collateral in merchant escrow deposits with respect to future delivery risk	23,000,000
Liability primarily related to airline processing arrangements	48,000,000
Merchant escrow deposits held as collateral related to unresolved charge-backs	70,000,000
Recorded liability for potential losses related to unresolved charge-backs	10,000,000
Contingent Consideration Arrangements [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	2,000,000
Carrying Amount	2,000,000
Collateral held
Tender Option Bond Program Guarantee [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	2,719,000,000
Carrying Amount
Collateral held	2,870,000,000
Minimum Revenue Guarantees [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	6,000,000
Carrying Amount	6,000,000
Collateral held
Other [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum potential future payments	502,000,000
Carrying Amount
Collateral held
Visa Class B [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Number of shares sold	3.8
Remaining shares held by the Company	8.9

Guarantees_and_Contigent_Liabi

Guarantees and Contigent Liabilities - Contract or Notional Amounts of Unfunded Commitments to Extend Credit (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Commercial and Commercial Real Estate [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	$113,269
Corporate and Purchasing Cards [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	21,301
Residential Mortgages [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	84
Retail Credit Cards [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	78,768
Other Retail [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	31,493
Covered Loans [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	667
Federal Funds [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	5,258
Less Than One Year [Member] | Commercial and Commercial Real Estate [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	24,161
Less Than One Year [Member] | Corporate and Purchasing Cards [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	21,301
Less Than One Year [Member] | Residential Mortgages [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	70
Less Than One Year [Member] | Retail Credit Cards [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	78,578
Less Than One Year [Member] | Other Retail [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	12,217
Less Than One Year [Member] | Federal Funds [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	5,258
Greater Than One Year [Member] | Commercial and Commercial Real Estate [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	89,108
Greater Than One Year [Member] | Residential Mortgages [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	14
Greater Than One Year [Member] | Retail Credit Cards [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	190
Greater Than One Year [Member] | Other Retail [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	19,276
Greater Than One Year [Member] | Covered Loans [Member]
Unfunded Commitments to Extend Credit [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	$667

Guarantees_and_Contingent_Liab3

Guarantees and Contingent Liabilities - Future Minimum Payments Under Capital Leases and Noncancelable Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Capital Leases
Capital Leases, 2015	$13
Capital Leases, 2016	12
Capital Leases, 2017	10
Capital Leases, 2018	10
Capital Leases, 2019	8
Capital Leases, Thereafter	34
Total minimum capital lease payments	87
Less amount representing interest	31
Present value of net minimum capital lease payments	56
Operating Leases
Operating Leases, 2015	265
Operating Leases, 2016	238
Operating Leases, 2017	206
Operating Leases, 2018	166
Operating Leases, 2019	134
Operating Leases, Thereafter	503
Total minimum operating lease payments	$1,512

Guarantees_and_Contingent_Liab4

Guarantees and Contingent Liabilities - Summary of Other Guarantees and Contingent Liabilities (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Collateral held
Carrying Amount	58
Maximum potential future payments	14,838
Third-Party Borrowing Arrangements [Member]
Guarantor Obligations [Line Items]
Collateral held
Carrying Amount
Maximum potential future payments	10
Securities Lending Indemnifications [Member]
Guarantor Obligations [Line Items]
Collateral held	4,649
Carrying Amount
Maximum potential future payments	4,514
Asset Sales [Member]
Guarantor Obligations [Line Items]
Collateral held
Carrying Amount	145
Maximum potential future payments	4,271
Merchant Processing [Member]
Guarantor Obligations [Line Items]
Collateral held	522
Carrying Amount	58
Maximum potential future payments	89,652
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	2,870
Carrying Amount
Maximum potential future payments	2,719
Minimum Revenue Guarantees [Member]
Guarantor Obligations [Line Items]
Collateral held
Carrying Amount	6
Maximum potential future payments	6
Other [Member]
Guarantor Obligations [Line Items]
Collateral held
Carrying Amount
Maximum potential future payments	$502

Guarantees_and_Contingent_Liab5

Guarantees and Contingent Liabilities - Contract or Notional Amount of Letters of Credit (Detail) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Standby Letters of Credit [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	$14,838
Commercial [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	407
Less Than One Year [Member] | Standby Letters of Credit [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	6,757
Less Than One Year [Member] | Commercial [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	354
Greater Than One Year [Member] | Standby Letters of Credit [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	8,081
Greater Than One Year [Member] | Commercial [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	$53

Guarantees_and_Contingent_Liab6

Guarantees and Contingent Liabilities - Representation and Warranty Reserve Rollforward (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract]
Representation and Warranty Reserve, Beginning Balance	$83	$240	$160
Net realized losses	-28	-115	-120
Change in reserve	-9	-42	200
Representation and Warranty Reserve, Ending Balance	$46	$83	$240

US_Bancorp_Parent_Company_Cond

U.S. Bancorp (Parent Company) - Condensed Statement of Financial Position of Parent Company Only (Detail) (USD $)	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Assets
Available-for-sale securities	$56,069	[1]	$40,935	[1]
Other assets	27,059	[1]	26,096	[1]
Total assets	402,529		364,021
Liabilities and Shareholders' Equity
Short-term funds borrowed	29,893		27,608		26,302
Long-term debt	32,260		20,049
Other liabilities	13,475		12,434
Shareholders' equity	43,479		41,113
Total liabilities and equity	402,529		364,021
Parent Company [Member]
Assets
Due from banks, principally interest-bearing	10,775		8,371
Available-for-sale securities	464		463
Other assets	1,762		1,628
Total assets	57,706		53,350
Liabilities and Shareholders' Equity
Short-term funds borrowed	177		138
Long-term debt	13,189		11,416
Other liabilities	861		683
Shareholders' equity	43,479		41,113
Total liabilities and equity	57,706		53,350
Bank Subsidiaries [Member] | Parent Company [Member]
Assets
Investments in subsidiaries	39,599		37,558
Advances to subsidiaries	2,650		2,250
Non-bank Subsidiaries [Member] | Parent Company [Member]
Assets
Investments in subsidiaries	1,906		1,546
Advances to subsidiaries	$550		$1,534
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

US_Bancorp_Parent_Company_Cond1

U.S. Bancorp (Parent Company) - Condensed Income Statement of Parent Company Only (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income
Other income	$1,040	$569	$743
Expense
Interest expense	1,453	1,681	2,138
Other expense	1,978	1,695	1,957
Income before income taxes	7,995	7,764	7,726
Applicable income taxes	2,087	2,032	2,236
Net income attributable to U.S. Bancorp	5,851	5,836	5,647
Parent Company [Member]
Income
Interest from subsidiaries	123	118	96
Other income	64	66	149
Total income	4,075	6,293	499
Expense
Interest expense	335	325	393
Other expense	90	81	122
Total expense	425	406	515
Income before income taxes	3,650	5,887	-16
Applicable income taxes	-94	-88	-85
Income of parent company	3,744	5,975	69
Equity in undistributed income (losses) of subsidiaries	2,107	-139	5,578
Net income attributable to U.S. Bancorp	5,851	5,836	5,647
Bank Subsidiaries [Member] | Parent Company [Member]
Income
Dividends from subsidiaries	3,850	6,100	250
Non-bank Subsidiaries [Member] | Parent Company [Member]
Income
Dividends from subsidiaries	$38	$9	$4

US_Bancorp_Parent_Company_Cond2

U.S. Bancorp (Parent Company) - Condensed Statement of Cash Flows of Parent Company Only (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities
Net income attributable to U.S. Bancorp	$5,851	$5,836	$5,647
Adjustments to reconcile net income to net cash provided by operating activities
Other, net	43	-115	1,916
Net cash provided by operating activities	5,332	11,446	7,958
Investing Activities
Other, net	506	-303	-1,261
Net cash (used in) provided by financing activities	-29,812	-21,024	-20,253
Financing Activities
Net increase in short-term borrowings	2,285	1,306	-4,167
Proceeds from issuance of long-term debt	16,394	2,041	4,966
Principal payments or redemption of long-term debt	-4,128	-2,883	-11,415
Proceeds from issuance of preferred stock		487	2,163
Proceeds from issuance of common stock	453	524	395
Redemption of preferred stock		-500
Repurchase of common stock	-2,200	-2,282	-1,856
Cash dividends paid on preferred stock	-243	-254	-204
Cash dividends paid on common stock	-1,726	-1,576	-1,347
Net cash provided by financing activities	26,657	9,803	6,585
Change in cash and due from banks	2,177	225	-5,710
Cash and due from banks at beginning of period	8,477	8,252	13,962
Cash and due from banks at end of period	10,654	8,477	8,252
Parent Company [Member]
Operating Activities
Net income attributable to U.S. Bancorp	5,851	5,836	5,647
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed (income) losses of subsidiaries	-2,107	139	-5,578
Other, net	48	-40	-35
Net cash provided by operating activities	3,792	5,935	34
Investing Activities
Proceeds from sales and maturities of investment securities	46	75	979
Purchases of investment securities	-39	-118	-35
Equity distributions from subsidiaries		12	845
Net decrease in short-term advances to subsidiaries	984	4,543	207
Long-term advances to subsidiaries	-1,800	-750	-500
Principal collected on long-term advances to subsidiaries	1,400
Other, net	-52	-9	-22
Net cash (used in) provided by financing activities	539	3,753	1,474
Financing Activities
Net increase in short-term borrowings	39	4	105
Proceeds from issuance of long-term debt	3,250	1,500	3,550
Principal payments or redemption of long-term debt	-1,500	-2,850	-5,412
Proceeds from issuance of preferred stock		487	2,163
Proceeds from issuance of common stock	453	524	395
Redemption of preferred stock		-500
Repurchase of common stock	-2,200	-2,282	-1,856
Cash dividends paid on preferred stock	-243	-254	-204
Cash dividends paid on common stock	-1,726	-1,576	-1,347
Net cash provided by financing activities	-1,927	-4,947	-2,606
Change in cash and due from banks	2,404	4,741	-1,098
Cash and due from banks at beginning of period	8,371	3,630	4,728
Cash and due from banks at end of period	$10,775	$8,371	$3,630

US_Bancorp_Parent_Company_Addi

U.S. Bancorp (Parent Company) - Additional Information (Detail)	Dec. 31, 2014
Receivables
Loan Limits to the company or individual affiliate	10.00%
Maximum limit of loans to the Company and all affiliates	20.00%