U.S. Bancorp (USB) 10-K 22 Feb 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Jan. 31, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	USB
Entity Registrant Name	US BANCORP \DE\
Entity Central Index Key	36,104
Current Fiscal Year End Date	--12-31
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		1,651,901,674
Entity Public Float			$ 87.2

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks		$ 19,505	$ 15,705
Investment securities
Held-to-maturity (fair value $43,723 and $42,435, respectively)		44,362	42,991
Available-for-sale ($689 and $755 pledged as collateral, respectively)	[1]	68,137	66,284
Loans held for sale (including $3,534 and $4,822 of mortgage loans carried at fair value, respectively)		3,554	4,826
Loans
Commercial		97,561	93,386
Commercial real estate		40,463	43,098
Residential mortgages		59,783	57,274
Credit card		22,180	21,749
Other retail		57,324	53,864
Total loans, excluding covered loans		277,311	269,371
Covered loans		3,121	3,836
Total loans		280,432	273,207
Less allowance for loan losses		(3,925)	(3,813)
Net loans		276,507	269,394
Premises and equipment		2,432	2,443
Goodwill		9,434	9,344
Other intangible assets		3,228	3,303
Other assets (including $238 and $314 of trading securities at fair value pledged as collateral, respectively)	[1]	34,881	31,674
Total assets		462,040	445,964
Deposits
Noninterest-bearing		87,557	86,097
Interest-bearing	[2]	259,658	248,493
Total deposits		347,215	334,590
Short-term borrowings		16,651	13,963
Long-term debt		32,259	33,323
Other liabilities		16,249	16,155
Total liabilities		412,374	398,031
Shareholders' equity
Preferred stock		5,419	5,501
Common stock, par value $0.01 a share - authorized: 4,000,000,000 shares; issued: 2017 and 2016 - 2,125,725,742 shares		21	21
Capital surplus		8,464	8,440
Retained earnings		54,142	50,151
Less cost of common stock in treasury: 2017 - 470,080,231 shares; 2016 - 428,813,585 shares		(17,602)	(15,280)
Accumulated other comprehensive income (loss)		(1,404)	(1,535)
Total U.S. Bancorp shareholders' equity		49,040	47,298
Noncontrolling interests		626	635
Total equity		49,666	47,933
Total liabilities and equity		$ 462,040	$ 445,964
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.
[2]	Includes time deposits greater than $250,000 balances of $6.8 billion and $3.0 billion at December 31, 2017 and 2016, respectively.

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Held-to-maturity securities, Fair Value	$ 43,723	$ 42,435
Securities, pledged as collateral	689	755
Mortgage loans, carried at fair value	$ 3,534	$ 4,822
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)	470,080,231	428,813,585
Time deposits greater than 250,000	$ 6,800	$ 3,000
Available-for-Sale Securities [Member]
Securities, pledged as collateral	689	755
Trading Securities [Member]
Securities, pledged as collateral	$ 238	$ 314

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Income
Loans	$ 11,827	$ 10,810	$ 10,059
Loans held for sale	144	154	206
Investment securities	2,232	2,078	2,001
Other interest income	182	125	136
Total interest income	14,385	13,167	12,402
Interest Expense
Deposits	1,041	622	457
Short-term borrowings	319	263	245
Long-term debt	784	754	699
Total interest expense	2,144	1,639	1,401
Net interest income	12,241	11,528	11,001
Provision for credit losses	1,390	1,324	1,132
Net interest income after provision for credit losses	10,851	10,204	9,869
Noninterest Income
Credit and debit card revenue	1,252	1,177	1,070
Corporate payment products revenue	753	712	708
Merchant processing services	1,590	1,592	1,547
ATM processing services	362	338	318
Trust and investment management fees	1,522	1,427	1,321
Deposit service charges	751	725	702
Treasury management fees	618	583	561
Commercial products revenue	849	871	867
Mortgage banking revenue	834	979	906
Investment products fees	163	158	185
Securities gains (losses), net
Realized gains (losses), net	57	27	1
Total other-than-temporary impairment		(6)	(1)
Portion of other-than-temporary impairment recognized in other comprehensive income (loss)		1
Total securities gains (losses), net	57	22
Other	860	993	907
Total noninterest income	9,611	9,577	9,092
Noninterest Expense
Compensation	5,746	5,212	4,812
Employee benefits	1,186	1,119	1,167
Net occupancy and equipment	1,019	988	991
Professional services	419	502	423
Marketing and business development	542	435	361
Technology and communications	977	955	887
Postage, printing and supplies	323	311	297
Other intangibles	175	179	174
Other	2,558	1,975	1,819
Total noninterest expense	12,945	11,676	10,931
Income before income taxes	7,517	8,105	8,030
Applicable income taxes	1,264	2,161	2,097
Net income	6,253	5,944	5,933
Net (income) loss attributable to noncontrolling interests	(35)	(56)	(54)
Net income attributable to U.S. Bancorp	6,218	5,888	5,879
Net income applicable to U.S. Bancorp common shareholders	$ 5,913	$ 5,589	$ 5,608
Earnings per common share	$ 3.53	$ 3.25	$ 3.18
Diluted earnings per common share	3.51	3.24	3.16
Dividends declared per common share	$ 1.16	$ 1.07	$ 1.01
Average common shares outstanding	1,677	1,718	1,764
Average diluted common shares outstanding	1,683	1,724	1,772

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 6,253	$ 5,944	$ 5,933
Other Comprehensive Income (Loss)
Changes in unrealized gains and losses on securities available-for-sale	178	(858)	(457)
Other-than-temporary impairment not recognized in earnings on securities available-for-sale		(1)
Changes in unrealized gains and losses on derivative hedges	(5)	74	(25)
Foreign currency translation	(2)	(28)	20
Changes in unrealized gains and losses on retirement plans	(41)	(255)	(142)
Reclassification to earnings of realized gains and losses	77	247	393
Income taxes related to other comprehensive income (loss)	(76)	305	88
Total other comprehensive income (loss)	131	(516)	(123)
Comprehensive income	6,384	5,428	5,810
Comprehensive (income) loss attributable to noncontrolling interests	(35)	(56)	(54)
Comprehensive income attributable to U.S. Bancorp	$ 6,349	$ 5,372	$ 5,756

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	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]
Beginning Balance at Dec. 31, 2014	$ 44,168	$ 21	$ 4,756	$ 8,313	$ 42,530	$ (11,245)	$ (896)	$ 43,479	$ 689
Shares, Beginning Balance at Dec. 31, 2014		1,786
Net income (loss)	5,933				5,879			5,879	54
Other comprehensive income (loss)	(123)						(123)	(123)
Preferred stock dividends	(247)				(247)			(247)
Common stock dividends	(1,785)				(1,785)			(1,785)
Issuance of preferred stock	745		745					745
Issuance of common and treasury stock	311			(55)		366		311
Issuance of common and treasury stock, shares		11
Purchase of treasury stock	$ (2,246)					(2,246)		(2,246)
Purchase of treasury stock, shares	(52)	(52)
Distributions to noncontrolling interests	$ (55)								(55)
Net other changes in noncontrolling interests	(2)								(2)
Stock option and restricted stock grants	118			118				118
Ending Balance at Dec. 31, 2015	46,817	$ 21	5,501	8,376	46,377	(13,125)	(1,019)	46,131	686
Shares, Ending Balance at Dec. 31, 2015		1,745
Net income (loss)	5,944				5,888			5,888	56
Other comprehensive income (loss)	(516)						(516)	(516)
Preferred stock dividends	(281)				(281)			(281)
Common stock dividends	(1,842)				(1,842)			(1,842)
Issuance of common and treasury stock	374			(71)		445		374
Issuance of common and treasury stock, shares		13
Purchase of treasury stock	$ (2,600)					(2,600)		(2,600)
Purchase of treasury stock, shares	(61)	(61)
Distributions to noncontrolling interests	$ (56)								(56)
Purchase of noncontrolling interests	(40)			1	9			10	(50)
Net other changes in noncontrolling interests	(1)								(1)
Stock option and restricted stock grants	134			134				134
Ending Balance at Dec. 31, 2016	$ 47,933	$ 21	5,501	8,440	50,151	(15,280)	(1,535)	47,298	635
Shares, Ending Balance at Dec. 31, 2016	1,700	1,697
Net income (loss)	$ 6,253				6,218			6,218	35
Other comprehensive income (loss)	131						131	131
Preferred stock dividends	(267)				(267)			(267)
Common stock dividends	(1,950)				(1,950)			(1,950)
Issuance of preferred stock	993		993					993
Redemption of preferred stock	(1,085)		(1,075)		(10)			(1,085)
Issuance of common and treasury stock	162			(138)		300		162
Issuance of common and treasury stock, shares		8
Purchase of treasury stock	$ (2,622)					(2,622)		(2,622)
Purchase of treasury stock, shares	(49)	(49)
Distributions to noncontrolling interests	$ (47)								(47)
Net other changes in noncontrolling interests	3								3
Stock option and restricted stock grants	162			162				162
Ending Balance at Dec. 31, 2017	$ 49,666	$ 21	$ 5,419	$ 8,464	$ 54,142	$ (17,602)	$ (1,404)	$ 49,040	$ 626
Shares, Ending Balance at Dec. 31, 2017	1,700	1,656

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities
Net income attributable to U.S. Bancorp	$ 6,218	$ 5,888	$ 5,879
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	1,390	1,324	1,132
Depreciation and amortization of premises and equipment	293	291	307
Amortization of intangibles	175	179	174
(Gain) loss on sale of loans held for sale	(772)	(954)	(993)
(Gain) loss on sale of securities and other assets	(502)	(617)	(403)
Loans originated for sale in the secondary market, net of repayments	(35,743)	(42,867)	(43,312)
Proceeds from sales of loans held for sale	37,462	41,605	45,211
Other, net	(2,049)	487	787
Net cash provided by operating activities	6,472	5,336	8,782
Investing Activities
Proceeds from sales of available-for-sale investment securities	3,084	9,877	690
Proceeds from maturities of held-to-maturity investment securities	8,306	9,733	10,567
Proceeds from maturities of available-for-sale investment securities	13,042	14,625	13,395
Purchases of held-to-maturity investment securities	(9,712)	(9,171)	(9,234)
Purchases of available-for-sale investment securities	(17,860)	(29,684)	(20,502)
Net increase in loans outstanding	(8,054)	(13,383)	(11,788)
Proceeds from sales of loans	2,458	2,604	1,723
Purchases of loans	(3,040)	(2,881)	(4,475)
Other, net	(350)	322	(1,526)
Net cash used in investing activities	(12,126)	(17,958)	(21,150)
Financing Activities
Net increase in deposits	12,625	34,192	18,290
Net increase (decrease) in short-term borrowings	2,688	(13,914)	(2,016)
Proceeds from issuance of long-term debt	9,434	10,715	5,067
Principal payments or redemption of long-term debt	(10,517)	(9,495)	(5,311)
Proceeds from issuance of preferred stock	993		745
Proceeds from issuance of common stock	159	355	295
Repurchase of preferred stock	(1,085)
Repurchase of common stock	(2,631)	(2,556)	(2,190)
Cash dividends paid on preferred stock	(284)	(267)	(242)
Cash dividends paid on common stock	(1,928)	(1,810)	(1,777)
Purchase of noncontrolling interests		(40)
Net cash provided by financing activities	9,454	17,180	12,861
Change in cash and due from banks	3,800	4,558	493
Cash and due from banks at beginning of year	15,705	11,147	10,654
Cash and due from banks at end of year	19,505	15,705	11,147
Supplemental Cash Flow Disclosures
Cash paid for income taxes	555	595	742
Cash paid for interest	2,086	1,591	1,434
Net noncash transfers to foreclosed property	$ 163	$ 156	$ 204

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
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, cash management, capital markets, insurance, trust and investment management, brokerage, and leasing activities, principally in domestic markets. Basis of Presentation Uses of 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: Corporate and Commercial Banking non-profit Consumer and Business Banking on-line Wealth Management and Investment Services Payment Services Treasury and Corporate Support tax-advantaged Segment Results 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 Available-for-sale Available-for-sale Held-to-maturity Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase 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 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 Purchased Loans (non-impaired non-impaired 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 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 Allowance for Credit 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. 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 the selected loss experience is appropriate 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, less selling costs, 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, delinquency status, 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 The allowance for the covered loan segment is evaluated each quarter in a manner similar to that described for non-covered 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 each loan segment 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 and other relevant business practices; results of internal review; 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 off-balance Credit Quality 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, reducing interest income in the current period. 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 placed on nonaccrual. Consumer lending segment loans are generally charged-off 1-4 charge-off 1-4 family charged-off. charged-off 1-4 charged-off charged-off charge-off. 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 charged-off) Covered loans not considered to be purchased impaired are evaluated for delinquency, nonaccrual status and charge-off 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 loans not classified on the Company’s rating scale for problem credits, as minimal credit risk has been identified. Special mention loans are those loans that have a potential weakness deserving management’s close attention. Classified loans are those loans 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 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 For the commercial lending segment, modifications generally result in the Company working with borrowers on a case-by-case Modifications for the consumer lending segment are generally part of programs the Company has initiated. The Company modifies residential mortgage loans under Federal Housing Administration, United States Department of Veterans Affairs, or its own internal programs. Under these programs, the Company offers qualifying homeowners the opportunity to permanently modify their loan and achieve more affordable monthly payments by providing loan concessions. These 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 Impaired Loans 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 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. re-marketing Other Real Estate 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 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 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 a net 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 In the ordinary course of business, the Company recognizes income derived from various revenue generating activities. Certain revenues are generated from contracts where they are recognized when, or as services or products are transferred to customers for amounts the Company expects to be entitled. Revenue generating activities related to financial assets and liabilities are also recognized; including mortgage servicing fees, loan commitment fees, foreign currency remeasurements, and gains and losses on securities, equity investments and unconsolidated subsidiaries. Certain specific policies include the following: Credit and Debit Card Revenue Corporate Payment Products Revenue Merchant Processing Services point-of-sale ATM Processing Services Trust and Investment Management Fees Deposit Service Charges Treasury Management Fees Commercial Products Revenue non-yield Mortgage Banking Revenue Investment Products Fees Other Noninterest Income Other Significant Policies Goodwill and Other Intangible Assets Income Taxes Mortgage Servicing Rights Pensions year-end Premises 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 Per Share Calculations two-class two-class

Accounting Changes

Accounting Changes	12 Months Ended
	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Accounting Changes	NOTE 2 Accounting Changes Stock-Based Compensation Revenue Recognition Financial Instruments — Hedge Accounting Accounting for Leases Financial Instruments—Credit Losses

Restrictions on Cash and Due fr

Restrictions on Cash and Due from Banks	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Restrictions on Cash and Due from Banks	NOTE 3 Restrictions on Cash and Due from Banks Banking regulators require bank subsidiaries to maintain minimum average reserve balances, either in the form of vault cash or reserve balances held with central banks or other financial institutions. The amount of required reserve balances were approximately $3.1 billion and $3.0 billion at December 31, 2017 and 2016, respectively, and primarily represent those required to be held at the Federal Reserve Bank. In addition to vault cash, the Company held balances at the Federal Reserve Bank and other financial institutions of $2.4 billion and $2.9 billion at December 31, 2017 and 2016, respectively, to meet these requirements. These balances are included in cash and due from banks on the Consolidated Balance Sheet.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Investment Securities	NOTE 4 Investment Securities The amortized cost, other-than-temporary impairment recorded in other comprehensive income (loss), gross unrealized holding gains and losses, and fair value of held-to-maturity available-for-sale 2017 2016 Unrealized Losses Unrealized Losses (Dollars in Millions) Amortized Unrealized Other-than- (e) Other (f) Fair Value Amortized Unrealized Other-than- (e) Other (f) Fair Value Held-to-maturity (a) U.S. Treasury and agencies $ 5,181 $ 5 $ – $ (120 ) $ 5,066 $ 5,246 $ 12 $ – $ (132 ) $ 5,126 Mortgage-backed securities Residential Agency 39,150 48 – (579 ) 38,619 37,706 85 – (529 ) 37,262 Non-agency non-prime (d) – – – – – 1 – – – 1 Asset-backed securities Collateralized debt obligations/Collateralized loan obligations – 4 – – 4 – 5 – – 5 Other 6 2 – – 8 8 3 – – 11 Obligations of state and political subdivisions 6 1 – – 7 6 1 – – 7 Obligations of foreign governments 7 – – – 7 9 – – – 9 Other debt securities 12 – – – 12 15 – – (1 ) 14 Total held-to-maturity $ 44,362 $ 60 $ – $ (699 ) $ 43,723 $ 42,991 $ 106 $ – $ (662 ) $ 42,435 Available-for-sale (b) U.S. Treasury and agencies $ 23,586 $ 3 $ – $ (288 ) $ 23,301 $ 17,314 $ 11 $ – $ (198 ) $ 17,127 Mortgage-backed securities Residential Agency 38,450 152 – (571 ) 38,031 43,558 225 – (645 ) 43,138 Non-agency Prime (c) – – – – – 240 6 (3 ) (1 ) 242 Non-prime (d) – – – – – 178 20 (3 ) – 195 Commercial agency 6 – – – 6 15 – – – 15 Other asset-backed securities 413 6 – – 419 475 8 – – 483 Obligations of state and political subdivisions 6,240 147 – (29 ) 6,358 5,167 55 – (183 ) 5,039 Corporate debt securities – – – – – 11 – – (2 ) 9 Other investments 22 – – – 22 27 9 – – 36 Total available-for-sale $ 68,717 $ 308 $ – $ (888 ) $ 68,137 $ 66,985 $ 334 $ (6 ) $ (1,029 ) $ 66,284 (a) Held-to-maturity available-for-sale held-to-maturity (b) Available-for-sale (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-to-value loan-to-value (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 held-to-maturity For amortized cost, fair value and yield by maturity date of held-to-maturity available-for-sale Investment securities with a fair value of $12.8 billion at December 31, 2017, and $11.3 billion at December 31, 2016, 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 securing these types of arrangements had a fair value of $689 million at December 31, 2017, and $755 million at December 31, 2016. The following table provides information about the amount of interest income from taxable and non-taxable Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Taxable $ 2,043 $ 1,878 $ 1,778 Non-taxable 189 200 223 Total interest income from investment securities $ 2,232 $ 2,078 $ 2,001 The following table provides information about the amount of gross gains and losses realized through the sales of available-for-sale Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Realized gains $ 75 $ 93 $ 7 Realized losses (18 ) (66 ) (6 ) Net realized gains (losses) $ 57 $ 27 $ 1 Income tax (benefit) on net realized gains (losses) $ 22 $ 10 $ – 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, the 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 Company determines 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) is measured as the difference between that discounted amount and the fair value of each investment security. The total amount of other-than-temporary impairment recorded was immaterial for the years ended December 31, 2017, 2016 and 2015. At December 31, 2017, 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, 2017: Less Than 12 Months 12 Months or Greater Total (Dollars in Millions) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Held-to-maturity U.S. Treasury and agencies $ 2,109 $ (18 ) $ 2,596 $ (102 ) $ 4,705 $ (120 ) Residential agency mortgage-backed securities 17,484 (152 ) 15,308 (427 ) 32,792 (579 ) Other asset-backed securities – – 2 – 2 – Other debt securities – – 12 – 12 – Total held-to-maturity $ 19,593 $ (170 ) $ 17,918 $ (529 ) $ 37,511 $ (699 ) Available-for-sale U.S. Treasury and agencies $ 13,911 $ (128 ) $ 9,124 $ (160 ) $ 23,035 $ (288 ) Residential agency mortgage-backed securities 9,132 (75 ) 20,635 (496 ) 29,767 (571 ) Obligations of state and political subdivisions 151 (1 ) 1,313 (28 ) 1,464 (29 ) Other investments – – 1 – 1 – Total available-for-sale $ 23,194 $ (204 ) $ 31,073 $ (684 ) $ 54,267 $ (888 ) 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 U.S. Treasury and agencies, agency mortgage-backed or state and political 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, 2017, 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, 2017
Receivables [Abstract]
Loans and Allowance for Credit Losses	NOTE 5 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) 2017 2016 Commercial Commercial $ 91,958 $ 87,928 Lease financing 5,603 5,458 Total commercial 97,561 93,386 Commercial Real Estate Commercial mortgages 29,367 31,592 Construction and development 11,096 11,506 Total commercial real estate 40,463 43,098 Residential Mortgages Residential mortgages 46,685 43,632 Home equity loans, first liens 13,098 13,642 Total residential mortgages 59,783 57,274 Credit Card 22,180 21,749 Other Retail Retail leasing 7,988 6,316 Home equity and second mortgages 16,327 16,369 Revolving credit 3,183 3,282 Installment 8,989 8,087 Automobile 18,934 17,571 Student 1,903 2,239 Total other retail 57,324 53,864 Total loans, excluding covered loans 277,311 269,371 Covered Loans 3,121 3,836 Total loans $ 280,432 $ 273,207 The Company had loans of $83.3 billion at December 31, 2017, and $84.5 billion at December 31, 2016, pledged at the Federal Home Loan Bank, and loans of $68.0 billion at December 31, 2017, and $66.5 billion at December 31, 2016, 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 Business Banking offices. Collateral for commercial loans may include marketable securities, accounts receivable, inventory, equipment and real estate. For details of the Company’s commercial portfolio by industry group and geography as of December 31, 2017 and 2016, 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, 2017 and 2016, see Table 8 included in Management’s Discussion and Analysis which is incorporated by reference into these Notes to Consolidated Financial Statements. Collateral for such loans may include the related property, marketable securities, accounts receivable, inventory and equipment. 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 $830 million at December 31, 2017, and $672 million at December 31, 2016. All purchased loans and related indemnification assets are recorded at fair value at the date of purchase. The Company evaluates purchased loans for impairment at the date of purchase in accordance with applicable authoritative accounting guidance. Purchased loans with evidence of credit deterioration since origination for which it is probable that all contractually required payments will not be collected are considered “purchased impaired loans.” All other purchased loans are considered “purchased nonimpaired loans.” Changes in the accretable balance for purchased impaired loans for the years ended December 31, were as follows: (Dollars in Millions) 2017 2016 2015 Balance at beginning of period $ 698 $ 957 $ 1,309 Accretion (386 ) (392 ) (382 ) Disposals (83 ) (110 ) (132 ) Reclassifications from nonaccretable difference (a) 129 244 163 Other (8 ) (1 ) (1 ) Balance at end of period $ 350 $ 698 $ 957 (a) Primarily relates to changes in expected credit performance. Allowance for Credit Losses Activity in the allowance for credit losses by portfolio class was as follows: (Dollars in Millions) Commercial Commercial Real Estate Residential Mortgages Credit Card Other Retail Total Loans, Excluding Covered Loans Covered Loans Total Loans Balance at December 31, 2016 $ 1,450 $ 812 $ 510 $ 934 $ 617 $ 4,323 $ 34 $ 4,357 Add Provision for credit losses 186 19 (24 ) 908 304 1,393 (3 ) 1,390 Deduct Loans charged-off 414 30 65 887 355 1,751 – 1,751 Less recoveries of loans charged-off (150 ) (30 ) (28 ) (101 ) (112 ) (421 ) – (421 ) Net loans charged-off 264 – 37 786 243 1,330 – 1,330 Other changes (a) – – – – – – – – Balance at December 31, 2017 $ 1,372 $ 831 $ 449 $ 1,056 $ 678 $ 4,386 $ 31 $ 4,417 Balance at December 31, 2015 $ 1,287 $ 724 $ 631 $ 883 $ 743 $ 4,268 $ 38 $ 4,306 Add Provision for credit losses 488 75 (61 ) 728 95 1,325 (1 ) 1,324 Deduct Loans charged-off 417 22 85 759 332 1,615 – 1,615 Less recoveries of loans charged-off (92 ) (35 ) (25 ) (83 ) (111 ) (346 ) – (346 ) Net loans charged-off 325 (13 ) 60 676 221 1,269 – 1,269 Other changes (a) – – – (1 ) – (1 ) (3 ) (4 ) Balance at December 31, 2016 $ 1,450 $ 812 $ 510 $ 934 $ 617 $ 4,323 $ 34 $ 4,357 Balance at December 31, 2014 $ 1,146 $ 726 $ 787 $ 880 $ 771 $ 4,310 $ 65 $ 4,375 Add Provision for credit losses 361 (30 ) (47 ) 654 193 1,131 1 1,132 Deduct Loans charged-off 314 22 135 726 319 1,516 – 1,516 Less recoveries of loans charged-off (95 ) (50 ) (26 ) (75 ) (98 ) (344 ) – (344 ) Net loans charged-off 219 (28 ) 109 651 221 1,172 – 1,172 Other changes (a) (1 ) – – – – (1 ) (28 ) (29 ) Balance at December 31, 2015 $ 1,287 $ 724 $ 631 $ 883 $ 743 $ 4,268 $ 38 $ 4,306 (a) Includes net changes in credit losses to be reimbursed by the FDIC and reductions in the allowance for covered loans where the reversal of a previously recorded allowance was offset by an associated decrease in the indemnification asset, and the impact of any loan sales. Additional detail of the allowance for credit losses by portfolio class was as follows: (Dollars in Millions) Commercial Commercial Real Estate Residential Mortgages Credit Card Other Retail Total Loans, Excluding Covered Loans Covered Loans Total Loans Allowance Balance at December 31, 2017 Related to Loans individually evaluated for impairment (a) $ 23 $ 4 $ – $ – $ – $ 27 $ – $ 27 TDRs collectively evaluated for impairment 14 4 139 60 19 236 1 237 Other loans collectively evaluated for impairment 1,335 818 310 996 659 4,118 – 4,118 Loans acquired with deteriorated credit quality – 5 – – – 5 30 35 Total allowance for credit losses $ 1,372 $ 831 $ 449 $ 1,056 $ 678 $ 4,386 $ 31 $ 4,417 Allowance Balance at December 31, 2016 Related to Loans individually evaluated for impairment (a) $ 50 $ 4 $ – $ – $ – $ 54 $ – $ 54 TDRs collectively evaluated for impairment 12 4 180 65 20 281 1 282 Other loans collectively evaluated for impairment 1,388 798 330 869 597 3,982 – 3,982 Loans acquired with deteriorated credit quality – 6 – – – 6 33 39 Total allowance for credit losses $ 1,450 $ 812 $ 510 $ 934 $ 617 $ 4,323 $ 34 $ 4,357 (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 Real Estate Residential Mortgages Credit Card Other Retail Total Loans, Excluding Covered (b) Total Loans December 31, 2017 Loans individually evaluated for impairment (a) $ 337 $ 71 $ – $ – $ – $ 408 $ – $ 408 TDRs collectively evaluated for impairment 148 145 3,524 230 186 4,233 36 4,269 Other loans collectively evaluated for impairment 97,076 40,174 56,258 21,950 57,138 272,596 1,073 273,669 Loans acquired with deteriorated credit quality – 73 1 – – 74 2,012 2,086 Total loans $ 97,561 $ 40,463 $ 59,783 $ 22,180 $ 57,324 $ 277,311 $ 3,121 $ 280,432 December 31, 2016 Loans individually evaluated for impairment (a) $ 623 $ 70 $ – $ – $ – $ 693 $ – $ 693 TDRs collectively evaluated for impairment 145 146 3,678 222 173 4,364 35 4,399 Other loans collectively evaluated for impairment 92,611 42,751 53,595 21,527 53,691 264,175 1,553 265,728 Loans acquired with deteriorated credit quality 7 131 1 – – 139 2,248 2,387 Total loans $ 93,386 $ 43,098 $ 57,274 $ 21,749 $ 53,864 $ 269,371 $ 3,836 $ 273,207 (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 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 Past Due 90 Days or More Past Due Nonperforming Total December 31, 2017 Commercial $ 97,005 $ 250 $ 57 $ 249 $ 97,561 Commercial real estate 40,279 36 6 142 40,463 Residential mortgages (a) 59,013 198 130 442 59,783 Credit card 21,593 302 284 1 22,180 Other retail 56,685 376 95 168 57,324 Total loans, excluding covered loans 274,575 1,162 572 1,002 277,311 Covered loans 2,917 50 148 6 3,121 Total loans $ 277,492 $ 1,212 $ 720 $ 1,008 $ 280,432 December 31, 2016 Commercial $ 92,588 $ 263 $ 52 $ 483 $ 93,386 Commercial real estate 42,922 44 8 124 43,098 Residential mortgages (a) 56,372 151 156 595 57,274 Credit card 21,209 284 253 3 21,749 Other retail 53,340 284 83 157 53,864 Total loans, excluding covered loans 266,431 1,026 552 1,362 269,371 Covered loans 3,563 55 212 6 3,836 Total loans $ 269,994 $ 1,081 $ 764 $ 1,368 $ 273,207 (a) At December 31, 2017, $385 million of loans 30–89 days past due and $1.9 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 United States Department of Veterans Affairs, were classified as current, compared with $273 million and $2.5 billion at December 31, 2016, 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, 2017 and 2016, 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, 2017, the amount of foreclosed residential real estate held by the Company, and included in OREO, was $156 million ($135 million excluding covered assets), compared with $201 million ($175 million excluding covered assets) at December 31, 2016. These amounts exclude $267 million and $373 million at December 31, 2017 and 2016, respectively, of foreclosed residential real estate related to mortgage loans whose payments are primarily insured by the Federal Housing Administration or guaranteed by the United States 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, 2017 and 2016, was $1.7 billion and $2.1 billion, respectively, of which $1.3 billion and $1.6 billion, respectively, 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 United States 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 Mention Classified (a) Total Criticized Total December 31, 2017 Commercial $ 95,297 $ 1,130 $ 1,134 $ 2,264 $ 97,561 Commercial real estate 39,162 648 653 1,301 40,463 Residential mortgages (b) 59,141 16 626 642 59,783 Credit card 21,895 – 285 285 22,180 Other retail 57,009 6 309 315 57,324 Total loans, excluding covered loans 272,504 1,800 3,007 4,807 277,311 Covered loans 3,072 – 49 49 3,121 Total loans $ 275,576 $ 1,800 $ 3,056 $ 4,856 $ 280,432 Total outstanding commitments $ 584,072 $ 3,142 $ 3,987 $ 7,129 $ 591,201 December 31, 2016 Commercial $ 89,739 $ 1,721 $ 1,926 $ 3,647 $ 93,386 Commercial real estate 41,634 663 801 1,464 43,098 Residential mortgages (b) 56,457 10 807 817 57,274 Credit card 21,493 – 256 256 21,749 Other retail 53,576 6 282 288 53,864 Total loans, excluding covered loans 262,899 2,400 4,072 6,472 269,371 Covered loans 3,766 – 70 70 3,836 Total loans $ 266,665 $ 2,400 $ 4,142 $ 6,542 $ 273,207 Total outstanding commitments $ 562,704 $ 4,920 $ 5,629 $ 10,549 $ 573,253 (a) Classified rating on consumer loans primarily based on delinquency status. (b) At December 31, 2017, $1.9 billion of GNMA loans 90 days or more past due and $1.7 billion of restructured GNMA loans whose repayments are insured by the Federal Housing Administration or guaranteed by the United States Department of Veterans Affairs were classified with a pass rating, compared with $2.5 billion and $1.6 billion at December 31, 2016, 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 Recorded Investment (a) Unpaid Principal Balance Valuation Allowance Commitments to Lend Additional Funds December 31, 2017 Commercial $ 550 $ 915 $ 44 $ 199 Commercial real estate 280 596 11 – Residential mortgages 1,946 2,339 116 1 Credit card 230 230 60 – Other retail 302 400 22 4 Total loans, excluding GNMA and covered loans 3,308 4,480 253 204 Loans purchased from GNMA mortgage pools 1,681 1,681 25 – Covered loans 38 44 1 – Total $ 5,027 $ 6,205 $ 279 $ 204 December 31, 2016 Commercial $ 849 $ 1,364 $ 68 $ 284 Commercial real estate 293 697 10 – Residential mortgages 2,274 2,847 153 – Credit card 222 222 64 – Other retail 281 456 22 4 Total loans, excluding GNMA and covered loans 3,919 5,586 317 288 Loans purchased from GNMA mortgage pools 1,574 1,574 28 – Covered loans 36 42 1 1 Total $ 5,529 $ 7,202 $ 346 $ 289 (a) Substantially all loans classified as impaired at December 31, 2017 and 2016, had an associated allowance for credit losses. The total amount of interest income recognized during 2017 on loans classified as impaired at December 31, 2017, excluding those acquired with deteriorated credit quality, was $204 million, compared to what would have been recognized at the original contractual terms of the loans of $265 million. Additional information on impaired loans for the years ended December 31 follows: (Dollars in Millions) Average Recorded Investment Interest Income Recognized 2017 Commercial $ 683 $ 7 Commercial real estate 273 11 Residential mortgages 2,135 103 Credit card 229 3 Other retail 287 14 Total loans, excluding GNMA and covered loans 3,607 138 Loans purchased from GNMA mortgage pools 1,672 65 Covered loans 37 1 Total $ 5,316 $ 204 2016 Commercial $ 799 $ 9 Commercial real estate 324 15 Residential mortgages 2,422 124 Credit card 214 4 Other retail 293 13 Total loans, excluding GNMA and covered loans 4,052 165 Loans purchased from GNMA mortgage pools 1,620 71 Covered loans 38 1 Total $ 5,710 $ 237 2015 Commercial $ 383 $ 13 Commercial real estate 433 16 Residential mortgages 2,666 131 Credit card 221 4 Other retail 336 14 Total loans, excluding GNMA and covered loans 4,039 178 Loans purchased from GNMA mortgage pools 2,079 95 Covered loans 42 1 Total $ 6,160 $ 274 Troubled Debt Restructurings (Dollars in Millions) Number of Loans Pre-Modification Outstanding Loan Balance Post-Modification Outstanding Loan Balance 2017 Commercial 2,758 $ 380 $ 328 Commercial real estate 128 82 78 Residential mortgages 800 90 88 Credit card 33,615 161 162 Other retail 3,881 79 68 Total loans, excluding GNMA and covered loans 41,182 792 724 Loans purchased from GNMA mortgage pools 6,791 881 867 Covered loans 11 2 2 Total loans 47,984 $ 1,675 $ 1,593 2016 Commercial 2,352 $ 844 $ 699 Commercial real estate 102 259 256 Residential mortgages 1,576 168 178 Credit card 31,394 151 153 Other retail 2,235 41 40 Total loans, excluding GNMA and covered loans 37,659 1,463 1,326 Loans purchased from GNMA mortgage pools 11,260 1,274 1,267 Covered loans 39 6 7 Total loans 48,958 $ 2,743 $ 2,600 2015 Commercial 1,607 $ 385 $ 396 Commercial real estate 108 78 76 Residential mortgages 2,080 260 258 Credit card 26,772 133 134 Other retail 2,530 54 54 Total loans, excluding GNMA and covered loans 33,097 910 918 Loans purchased from GNMA mortgage pools 8,199 864 862 Covered loans 16 5 5 Total loans 41,312 $ 1,779 $ 1,785 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 2017, at December 31, 2017, 37 residential mortgages, 25 home equity and second mortgage loans and 983 loans purchased from GNMA mortgage pools with outstanding balances of $5 million, $2 million and $125 million, respectively, were in a trial period and have estimated post-modification balances of $5 million, $2 million and $125 million, respectively, assuming permanent modification occurs at the end of the trial period. The following table provides a summary of TDR loans that defaulted (fully or partially charged-off (Dollars in Millions) Number Amount 2017 Commercial 724 $ 53 Commercial real estate 36 9 Residential mortgages 374 41 Credit card 8,372 36 Other retail 415 5 Total loans, excluding GNMA and covered loans 9,921 144 Loans purchased from GNMA mortgage pools 1,369 177 Covered loans 4 – Total loans 11,294 $ 321 2016 Commercial 531 $ 24 Commercial real estate 27 12 Residential mortgages 132 17 Credit card 6,827 30 Other retail 434 9 Total loans, excluding GNMA and covered loans 7,951 92 Loans purchased from GNMA mortgage pools 202 25 Covered loans 4 1 Total loans 8,157 $ 118 2015 Commercial 494 $ 21 Commercial real estate 18 8 Residential mortgages 273 36 Credit card 6,286 29 Other retail 636 12 Total loans, excluding GNMA and covered loans 7,707 106 Loans purchased from GNMA mortgage pools 598 75 Covered loans 5 1 Total loans 8,310 $ 182 In addition to the defaults in the table above, the Company had a total of 1,768 residential mortgage loans, home equity and second mortgage loans and loans purchased from GNMA mortgage pools for the year ended December 31, 2017, 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. These loans had aggregate outstanding balances of $206 million for the year ended December 31, 2017. Covered Assets 2017 2016 (Dollars in Millions) Purchased Impaired Loans Purchased Nonimpaired Loans Other Total Purchased Impaired Loans Purchased Nonimpaired Loans Other Total Residential mortgage loans $ 2,012 $ 400 $ – $ 2,412 $ 2,248 $ 506 $ – $ 2,754 Other retail loans – 151 – 151 – 278 – 278 Losses reimbursable by the FDIC (a) – – 320 320 – – 381 381 Unamortized changes in FDIC asset (b) – – 238 238 – – 423 423 Covered loans 2,012 551 558 3,121 2,248 784 804 3,836 Foreclosed real estate – – 21 21 – – 26 26 Total covered assets $ 2,012 $ 551 $ 579 $ 3,142 $ 2,248 $ 784 $ 830 $ 3,862 (a) Relates to loss sharing agreements with remaining terms up through the fourth quarter of 2019. (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. Interest income is recognized on 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, 2017
Leases [Abstract]
Leases	NOTE 6 Leases The components of the net investment in sales-type and direct financing leases at December 31 were as follows: (Dollars in Millions) 2017 2016 Aggregate future minimum lease payments to be received $ 12,709 $ 11,257 Unguaranteed residual values accruing to the lessor’s benefit 1,731 1,175 Unearned income (1,205 ) (1,023 ) Initial direct costs 274 237 Total net investment in sales-type and direct financing leases (a) $ 13,509 $ 11,646 (a) The accumulated allowance for uncollectible minimum lease payments was $94 million and $83 million at December 31, 2017 and 2016, respectively. The minimum future lease payments to be received from sales-type and direct financing leases were as follows at December 31, 2017: (Dollars in Millions) 2018 $ 3,709 2019 3,643 2020 3,239 2021 1,180 2022 410 Thereafter 528

Accounting for Transfers and Se

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities	NOTE 7 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 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 9. 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 The Company also provides financial support primarily through the use of waivers of management fees associated with various unconsolidated registered money market funds it manages. The Company provided $23 million, $45 million and $112 million of support to the funds during the years ended December 31, 2017, 2016 and 2015, respectively. 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 tax-advantaged 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 At December 31 (Dollars in Millions) 2017 2016 Investment carrying amount $ 5,660 $ 5,009 Unfunded capital and other commitments 2,770 2,477 Maximum exposure to loss 12,120 10,373 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 $30 million at December 31, 2017, and $28 million at December 31, 2016. The maximum exposure to loss related to these VIEs was $51 million at December 31, 2017 and $50 million at December 31, 2016, 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 $56 million at December 31, 2017, compared with less than $1 million to $40 million at December 31, 2016. 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 tax-advantaged 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, 2017, $18 million of the held-to-maturity 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 liquidity and remarketing arrangements to the program. As a result, the Company has consolidated the program’s entities. At December 31, 2017, $2.5 billion of available-for-sale available-for-sale

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Premises and Equipment	NOTE 8 Premises and Equipment Premises and equipment at December 31 consisted of the following: (Dollars in Millions) 2017 2016 Land $ 520 $ 516 Buildings and improvements 3,425 3,383 Furniture, fixtures and equipment 2,951 2,798 Capitalized building and equipment leases 130 125 Construction in progress 35 29 7,061 6,851 Less accumulated depreciation and amortization (4,629 ) (4,408 ) Total $ 2,432 $ 2,443

Mortgage Servicing Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Mortgage Servicing Rights	NOTE 9 Mortgage Servicing Rights The Company serviced $234.7 billion of residential mortgage loans for others at December 31, 2017, and $232.6 billion at December 31, 2016, 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 $15 million, $7 million and $23 million for the years ended December 31, 2017, 2016 and 2015, respectively. Loan servicing and ancillary fees, not including valuation changes, included in mortgage banking revenue were $746 million, $750 million and $728 million for the years ended December 31, 2017, 2016 and 2015, respectively. Changes in fair value of capitalized MSRs for the years ended December 31, are summarized as follows: (Dollars in Millions) 2017 2016 2015 Balance at beginning of period $ 2,591 $ 2,512 $ 2,338 Rights purchased 13 43 29 Rights capitalized 445 524 632 Changes in fair value of MSRs Due to fluctuations in market interest rates (a) (23 ) (55 ) (58 ) Due to revised assumptions or models (b) 18 19 10 Other changes in fair value (c) (399 ) (452 ) (439 ) Balance at end of period $ 2,645 $ 2,591 $ 2,512 (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 option adjusted spread, as well as the impact of any model changes. (c) Primarily represents changes due to realization of expected cash flows over time (decay). The estimated sensitivity to changes in interest rates of the fair value of the MSRs portfolio and the related derivative instruments as of December 31 follows: 2017 2016 (Dollars in Millions) Down Down Down Up Up 50 bps Up Down Down Down Up Up 50 bps Up MSR portfolio $ (520 ) $ (231 ) $ (109 ) $ 95 $ 177 $ 302 $ (476 ) $ (209 ) $ (98 ) $ 85 $ 159 $ 270 Derivative instrument hedges 453 216 105 (96 ) (184 ) (336 ) 375 180 88 (84 ) (165 ) (314 ) Net sensitivity $ (67 ) $ (15 ) $ (4 ) $ (1 ) $ (7 ) $ (34 ) $ (101 ) $ (29 ) $ (10 ) $ 1 $ (6 ) $ (44 ) 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 Housing Finance Agency (“HFA”) mortgages. The servicing portfolios are predominantly comprised of fixed-rate agency loans with limited adjustable-rate or jumbo mortgage loans. The HFA division specializes in servicing loans made under state and local housing authority programs. These programs provide mortgages to low-income A summary of the Company’s MSRs and related characteristics by portfolio as of December 31 follows: 2017 2016 (Dollars in Millions) HFA Government Conventional (c) Total HFA Government Conventional (c) Total Servicing portfolio (a) $ 40,737 $ 36,756 $ 155,353 $ 232,846 $ 34,746 $ 37,530 $ 157,771 $ 230,047 Fair value $ 450 $ 428 $ 1,767 $ 2,645 $ 398 $ 422 $ 1,771 $ 2,591 Value (bps) (b) 110 116 114 114 115 112 112 113 Weighted-average servicing fees (bps) 35 34 27 29 36 34 27 30 Multiple (value/servicing fees) 3.17 3.38 4.24 3.86 3.19 3.29 4.15 3.77 Weighted-average note rate 4.43 % 3.92 % 4.02 % 4.08 % 4.37 % 3.95 % 4.02 % 4.06 % Weighted-average age (in years) 3.0 4.3 4.2 4.0 2.9 3.8 3.8 3.7 Weighted-average expected prepayment (constant prepayment rate) 9.8 % 11.6 % 9.7 % 10.0 % 9.4 % 11.3 % 9.8 % 10.0 % Weighted-average expected life (in years) 7.7 6.5 6.9 7.0 8.0 6.8 6.9 7.0 Weighted-average option adjusted spread (d) 9.9 % 9.2 % 7.2 % 8.0 % 9.9 % 9.2 % 7.2 % 8.0 % (a) Represents principal balance of mortgages having corresponding MSR asset. (b) Calculated as fair value divided by the servicing portfolio. (c) Represents loans sold primarily to GSEs. (d) Option adjusted spread is the incremental spread added to the risk-free rate to reflect optionality and other risk inherent in the MSRs.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE 10 Intangible Assets Intangible assets consisted of the following: At December 31 (Dollars in Millions) Estimated Life (a) Amortization Method (b) Balance 2017 2016 Goodwill (c) $ 9,434 $ 9,344 Merchant processing contracts 7 years/8 years SL/AC 89 108 Core deposit benefits 22 years/5 years SL/AC 131 161 Mortgage servicing rights (c) 2,645 2,591 Trust relationships 10 years/7 years SL/AC 45 59 Other identified intangibles 6 years/4 years SL/AC 318 384 Total $ 12,662 $ 12,647 (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 = straight line method AC = accelerated 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) 2017 2016 2015 Merchant processing contracts $ 24 $ 28 $ 35 Core deposit benefits 30 34 40 Trust relationships 14 16 21 Other identified intangibles 107 101 78 Total $ 175 $ 179 $ 174 The estimated amortization expense for the next five years is as follows: (Dollars in Millions) 2018 $ 148 2019 119 2020 93 2021 71 2022 51 The following table reflects the changes in the carrying value of goodwill for the years ended December 31, 2017, 2016 and 2015: (Dollars in Millions) Corporate and Consumer and Wealth Management and Payment Treasury and Consolidated Balance at December 31, 2014 $ 1,648 $ 3,680 $ 1,570 $ 2,491 $ – $ 9,389 Foreign exchange translation and other (1 ) 1 (3 ) (25 ) – (28 ) Balance at December 31, 2015 $ 1,647 $ 3,681 $ 1,567 $ 2,466 $ – $ 9,361 Foreign exchange translation and other – – (1 ) (16 ) – (17 ) Balance at December 31, 2016 $ 1,647 $ 3,681 $ 1,566 $ 2,450 $ – $ 9,344 Goodwill acquired – – – 62 – 62 Foreign exchange translation and other – – 3 25 – 28 Balance at December 31, 2017 $ 1,647 $ 3,681 $ 1,569 $ 2,537 $ – $ 9,434

Deposits

Deposits	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Deposits	NOTE 11 Deposits The composition of deposits at December 31 was as follows: (Dollars in Millions) 2017 2016 Noninterest-bearing deposits $ 87,557 $ 86,097 Interest-bearing deposits Interest checking 74,520 66,298 Money market savings 107,973 109,947 Savings accounts 43,809 41,783 Time deposits 33,356 30,465 Total interest-bearing deposits 259,658 248,493 Total deposits $ 347,215 $ 334,590 The maturities of time deposits outstanding at December 31, 2017 were as follows: (Dollars in Millions) 2018 $ 27,158 2019 2,712 2020 1,570 2021 1,226 2022 685 Thereafter 5 Total $ 33,356

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 (Dollars in Millions) Amount Rate Amount Rate Amount Rate At year-end Federal funds purchased $ 252 .77 % $ 447 .30 % $ 647 .23 % Securities sold under agreements to repurchase 803 .61 801 .12 1,092 .02 Commercial paper 8,303 .68 10,010 .30 22,022 .21 Other short-term borrowings 7,293 2.13 2,705 1.00 4,116 .69 Total $ 16,651 1.31 % $ 13,963 .43 % $ 27,877 .27 % Average for the year Federal funds purchased (b) $ 528 34.57 % $ 1,015 17.17 % $ 1,169 15.05 % Securities sold under agreements to repurchase 917 .44 891 .18 973 .10 Commercial paper 8,236 .49 14,827 .26 21,892 .12 Other short-term borrowings 5,341 1.90 3,173 1.67 3,926 1.13 Total (b) $ 15,022 2.18 % $ 19,906 1.34 % $ 27,960 .89 % Maximum month-end Federal funds purchased $ 600 $ 2,487 $ 1,868 Securities sold under agreements to repurchase 927 1,177 1,124 Commercial paper 9,950 21,441 23,101 Other short-term borrowings 7,293 6,771 7,656 (a) Interest and rates are presented on a fully taxable-equivalent basis utilizing a tax rate of 35 percent for the periods presented. (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 2017, 2016 and 2015 was $178 million, $171 million and $175 million, respectively.

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2017
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 2017 2016 U.S. Bancorp (Parent Company) Subordinated notes Fixed 2.950 % 2022 $ 1,300 $ 1,300 Fixed 3.600 % 2024 1,000 1,000 Fixed 7.500 % 2026 199 199 Fixed 3.100 % 2026 1,000 1,000 Medium-term notes Fixed .850% - 4.125 % 2018 - 2027 11,299 8,800 Floating 1.767% - 2.005 % 2018 - 2022 1,000 750 Other (b) (29 ) (4 ) Subtotal 15,769 13,045 Subsidiaries Federal Home Loan Bank advances Fixed 1.250% - 8.250 % 2018 - 2026 208 10 Floating 1.557% - 1.973 % 2018 - 2026 5,272 8,559 Bank notes Fixed 1.400% - 2.800 % 2019 - 2025 6,200 6,800 Floating 1.063% - 1.858 % 2019 - 2057 3,810 3,898 Other (c) 1,000 1,011 Subtotal 16,490 20,278 Total $ 32,259 $ 33,323 (a) Weighted-average interest rates of medium-term notes, Federal Home Loan Bank advances and bank notes were 2.51 percent, 1.83 percent and 1.86 percent, respectively. (b) Includes debt issuance fees and unrealized gains and losses and deferred amounts relating to derivative instruments. (c) Includes consolidated community development and tax-advantaged The Company has arrangements with the Federal Home Loan Bank and Federal Reserve Bank whereby the Company could have borrowed an additional $87.7 billion and $91.4 billion at December 31, 2017 and 2016, respectively, based on collateral available. Maturities of long-term debt outstanding at December 31, 2017, were: (Dollars in Millions) Parent Consolidated 2018 $ 1,499 $ 2,572 2019 1,497 8,001 2020 – 3,047 2021 2,196 2,215 2022 3,790 4,074 Thereafter 6,787 12,350 Total $ 15,769 $ 32,259

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Shareholders' Equity	NOTE 14 Shareholders’ Equity At December 31, 2017 and 2016, the Company had authority to issue 4 billion shares of common stock and 50 million shares of preferred stock. The Company had 1.7 billion shares of common stock outstanding at December 31, 2017 and 2016. The Company had 59 million shares reserved for future issuances, primarily under its stock incentive plans at December 31, 2017. The number of shares issued and outstanding and the carrying amount of each outstanding series of the Company’s preferred stock were as follows: 2017 2016 At December 31 (Dollars in Millions) Shares Liquidation Discount Carrying Shares Liquidation Discount Carrying 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 Series H 20,000 500 13 487 20,000 500 13 487 Series I 30,000 750 5 745 30,000 750 5 745 Series J 40,000 1,000 7 993 – – – – Total preferred stock (a) 186,510 $ 5,601 $ 182 $ 5,419 189,910 $ 5,686 $ 185 $ 5,501 (a) The par value of all shares issued and outstanding at December 31, 2017 and 2016, was $1.00 per share. During 2017, the Company issued depositary shares representing an ownership interest in 40,000 shares of Series J Non-Cumulative During 2015, the Company issued depositary shares representing an ownership interest in 30,000 shares of Series I Non-Cumulative During 2013, the Company issued depositary shares representing an ownership interest in 20,000 shares of Series H Non-Cumulative During 2012, the Company issued depositary shares representing an ownership interest in 44,000 shares of Series F Non-Cumulative Non-Cumulative During 2010, the Company issued depositary shares representing an ownership interest in 5,746 shares of Series A Non-Cumulative During 2006, the Company issued depositary shares representing an ownership interest in 40,000 shares of Series B Non-Cumulative During 2017, 2016 and 2015, the Company repurchased shares of its common stock under various authorizations approved by its Board of Directors. As of December 31, 2017, the approximate dollar value of shares that may yet be purchased by the Company under the current Board of Directors approved authorization was $1.3 billion. The following table summarizes the Company’s common stock repurchased in each of the last three years: (Dollars and Shares in Millions) Shares Value 2017 49 $ 2,622 2016 61 2,600 2015 52 2,246 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 Available-For- Sale Unrealized Gains Available-For-Sale Held-To-Maturity Unrealized Gains Unrealized Gains Foreign Currency Total 2017 Balance at beginning of period $ (431 ) $ 25 $ 55 $ (1,113 ) $ (71 ) $ (1,535 ) Changes in unrealized gains and losses 178 – (5 ) (41 ) – 132 Foreign currency translation adjustment (a) – – – – (2 ) (2 ) Reclassification to earnings of realized gains and losses (57 ) (13 ) 30 117 – 77 Applicable income taxes (47 ) 5 (9 ) (29 ) 4 (76 ) Balance at end of period $ (357 ) $ 17 $ 71 $ (1,066 ) $ (69 ) $ (1,404 ) 2016 Balance at beginning of period $ 111 $ 36 $ (67 ) $ (1,056 ) $ (43 ) $ (1,019 ) Changes in unrealized gains and losses (858 ) – 74 (255 ) – (1,039 ) Other-than-temporary impairment not recognized in earnings on securities available-for-sale (1 ) – – – – (1 ) Foreign currency translation adjustment (a) – – – – (28 ) (28 ) Reclassification to earnings of realized gains and losses (22 ) (18 ) 124 163 – 247 Applicable income taxes 339 7 (76 ) 35 – 305 Balance at end of period $ (431 ) $ 25 $ 55 $ (1,113 ) $ (71 ) $ (1,535 ) 2015 Balance at beginning of period $ 392 $ 52 $ (172 ) $ (1,106 ) $ (62 ) $ (896 ) Changes in unrealized gains and losses (457 ) – (25 ) (142 ) – (624 ) Foreign currency translation adjustment (a) – – – – 20 20 Reclassification to earnings of realized gains and losses – (25 ) 195 223 – 393 Applicable income taxes 176 9 (65 ) (31 ) (1 ) 88 Balance at end of period $ 111 $ 36 $ (67 ) $ (1,056 ) $ (43 ) $ (1,019 ) (a) Represents the impact of changes in foreign currency exchange rates on the Company’s investment in foreign operations and related hedges. 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 Net Income Affected Line Item in the (Dollars in Millions) 2017 2016 2015 Unrealized gains (losses) on securities available-for-sale Realized gains (losses) on sale of securities $ 57 $ 27 $ 1 Total securities gains (losses), net Other-than-temporary impairment recognized in earnings – (5 ) (1 ) 57 22 – Total before tax (22 ) (9 ) – Applicable income taxes 35 13 – Net-of-tax Unrealized gains (losses) on securities transferred from available-for-sale held-to-maturity Amortization of unrealized gains 13 18 25 Interest income (5 ) (7 ) (9 ) Applicable income taxes 8 11 16 Net-of-tax Unrealized gains (losses) on derivative hedges Realized gains (losses) on derivative hedges (30 ) (124 ) (195 ) Interest expense 11 48 75 Applicable income taxes (19 ) (76 ) (120 ) Net-of-tax Unrealized gains (losses) on retirement plans Actuarial gains (losses) and prior service cost (credit) amortization (117 ) (163 ) (223 ) Employee benefits expense 45 63 85 Applicable income taxes (72 ) (100 ) (138 ) Net-of-tax Total impact to net income $ (48 ) $ (152 ) $ (242 ) Regulatory Capital Tier 1 capital is considered core capital and includes common shareholders’ equity adjusted for the aggregate impact of certain items included in other comprehensive income (loss) (“common equity tier 1 capital”), plus qualifying preferred stock, trust preferred securities and noncontrolling interests in consolidated subsidiaries subject to certain limitations. 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-weighted assets, which are measured based on their perceived credit and operational risks and include certain off-balance non-qualifying For a summary of the regulatory capital requirements and the actual ratios as of December 31, 2017 and 2016, for the Company and its bank subsidiary, see Table 23 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) 2017 2016 Basel III transitional standardized approach: Common shareholders’ equity $ 43,621 $ 41,797 Less intangible assets Goodwill (net of deferred tax liability) (8,613 ) (8,203 ) Other disallowed intangible assets (466 ) (427 ) Other (a) (173 ) 553 Total common equity tier 1 capital 34,369 33,720 Qualifying preferred stock 5,419 5,501 Noncontrolling interests eligible for tier 1 capital 117 203 Other (b) (99 ) (3 ) Total tier 1 capital 39,806 39,421 Eligible portion of allowance for credit losses 4,417 4,357 Subordinated debt and noncontrolling interests eligible for tier 2 capital 3,280 3,576 Other – 1 Total tier 2 capital 7,697 7,934 Total risk-based capital $ 47,503 $ 47,355 Risk-weighted assets $ 367,771 $ 358,237 Basel III transitional advanced approaches: Common shareholders’ equity $ 43,621 $ 41,797 Less intangible assets Goodwill (net of deferred tax liability) (8,613 ) (8,203 ) Other disallowed intangible assets (466 ) (427 ) Other (a) (173 ) 553 Total common equity tier 1 capital 34,369 33,720 Qualifying preferred stock 5,419 5,501 Noncontrolling interests eligible for tier 1 capital 117 203 Other (b) (99 ) (3 ) Total tier 1 capital 39,806 39,421 Eligible portion of allowance for credit losses 1,391 1,266 Subordinated debt and noncontrolling interests eligible for tier 2 capital 3,280 3,576 Other – 1 Total tier 2 capital 4,671 4,843 Total risk-based capital $ 44,477 $ 44,264 Risk-weighted assets $ 287,211 $ 277,141 (a) Includes the impact of items included in other comprehensive income (loss), such as unrealized gains (losses) on available-for-sale (b) Includes the remaining portion of deferred tax assets not eligible for total tier 1 capital. 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 Non-cumulative 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. During 2016, the Company purchased 500 shares of the Series A Preferred Securities held by third party investors at an amount below their carrying amount, recording a net gain of $9 million directly to retained earnings. As of December 31, 2017, 4,500 shares of the Series A Preferred Securities remain outstanding.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 15 Earnings Per Share The components of earnings per share were: Year Ended December 31 (Dollars and Shares in Millions, Except Per Share Data) 2017 2016 2015 Net income attributable to U.S. Bancorp $ 6,218 $ 5,888 $ 5,879 Preferred dividends (267 ) (281 ) (247 ) Impact of preferred stock redemption (a) (10 ) – – Impact of the purchase of noncontrolling interests (b) – 9 – Earnings allocated to participating stock awards (28 ) (27 ) (24 ) Net income applicable to U.S. Bancorp common shareholders $ 5,913 $ 5,589 $ 5,608 Average common shares outstanding 1,677 1,718 1,764 Net effect of the exercise and assumed purchase of stock awards 6 6 8 Average diluted common shares outstanding 1,683 1,724 1,772 Earnings per common share $ 3.53 $ 3.25 $ 3.18 Diluted earnings per common share $ 3.51 $ 3.24 $ 3.16 (a) Represents stock issuance costs originally recorded in preferred stock upon the issuance of the Company’s Series G Preferred Stock that were reclassified to retained earnings on the date the Company announced its intent to redeem the outstanding shares. (b) Represents the difference between the carrying amount and amount paid by the Company to purchase third party investor holdings of the preferred stock of USB Realty Corp, a consolidated subsidiary of the Company. Options outstanding at December 31, 2017, 2016 and 2015, to purchase 1 million common shares, were not included in the computation of diluted earnings per share for the years ended December 31, 2017, 2016 and 2015, respectively, because they were antidilutive.

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Benefits	NOTE 16 Employee Benefits Employee Retirement Savings Plan Pension Plans In general, the Company’s qualified pension plan’s 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 the plan, its 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 plan 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 contributed $1.2 billion and $358 million to its qualified pension plan in 2017 and 2016, respectively, and does not expect to contribute to the plan in 2018. Any contributions made to the qualified plan are invested in accordance with established investment policies and asset allocation strategies. In addition to the funded qualified pension plan, the Company maintains a non-qualified non-qualified Postretirement Welfare Plan 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 (Dollars in Millions) 2017 2016 2017 2016 Change In Projected Benefit Obligation Benefit obligation at beginning of measurement period $ 5,073 $ 4,650 $ 75 $ 93 Service cost 187 177 – – Interest cost 220 211 2 3 Participants’ contributions – – 8 10 Actuarial loss (gain) 430 234 (1 ) (14 ) Lump sum settlements (45 ) (61 ) – – Benefit payments (145 ) (138 ) (18 ) (19 ) Federal subsidy on benefits paid – – 2 2 Benefit obligation at end of measurement period (a) $ 5,720 $ 5,073 $ 68 $ 75 Change In Fair Value Of Plan Assets Fair value at beginning of measurement period $ 3,769 $ 3,355 $ 82 $ 82 Actual return on plan assets 665 230 10 2 Employer contributions 1,238 383 5 7 Participants’ contributions – – 8 10 Lump sum settlements (45 ) (61 ) – – Benefit payments (145 ) (138 ) (18 ) (19 ) Fair value at end of measurement period $ 5,482 $ 3,769 $ 87 $ 82 Funded (Unfunded) Status $ (238 ) $ (1,304 ) $ 19 $ 7 Components Of The Consolidated Balance Sheet Noncurrent benefit asset $ 270 $ – $ 19 $ 7 Current benefit liability (23 ) (22 ) – – Noncurrent benefit liability (485 ) (1,282 ) – – Recognized amount $ (238 ) $ (1,304 ) $ 19 $ 7 Accumulated Other Comprehensive Income (Loss), Pretax Net actuarial gain (loss) $ (1,822 ) $ (1,901 ) $ 68 $ 66 Net prior service credit (cost) – 2 22 25 Recognized amount $ (1,822 ) $ (1,899 ) $ 90 $ 91 (a) At December 31, 2017 and 2016, the accumulated benefit obligation for all pension plans was $5.2 billion and $4.6 billion. The following table provides information for pension plans with benefit obligations in excess of plan assets at December 31: (Dollars in Millions) 2017 2016 Pension Plans with Projected Benefit Obligations in Excess of Plan Assets Projected benefit obligation $ 508 $ 5,073 Fair value of plan assets – 3,769 Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets Projected benefit obligation $ 508 $ 5,073 Accumulated benefit obligation 485 4,625 Fair value of plan assets – 3,769 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) 2017 2016 2015 2017 2016 2015 Components Of Net Periodic Benefit Cost Service cost $ 187 $ 177 $ 188 $ – $ – $ – Interest cost 220 211 195 2 3 3 Expected return on plan assets (284 ) (266 ) (223 ) (3 ) (1 ) (1 ) Prior service cost (credit) and transition obligation (asset) amortization (2 ) (5 ) (4 ) (3 ) (3 ) (3 ) Actuarial loss (gain) amortization 127 175 234 (5 ) (4 ) (4 ) Net periodic benefit cost $ 248 $ 292 $ 390 $ (9 ) $ (5 ) $ (5 ) Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income (Loss) Net actuarial gain (loss) arising during the year $ (48 ) $ (270 ) $ (146 ) $ 7 $ 15 $ 4 Net actuarial loss (gain) amortized during the year 127 175 234 (5 ) (4 ) (4 ) Net prior service cost (credit) and transition obligation (asset) amortized during the year (2 ) (5 ) (4 ) (3 ) (3 ) (3 ) Total recognized in other comprehensive income (loss) $ 77 $ (100 ) $ 84 $ (1 ) $ 8 $ (3 ) Total recognized in net periodic benefit cost and other comprehensive income (loss) (a)(b) $ (171 ) $ (392 ) $ (306 ) $ 8 $ 13 $ 2 (a) The pretax estimated actuarial loss (gain) for the pension plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in 2018 is $146 million. (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 2018 are $(6) 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 (Dollars in Millions) 2017 2016 2017 2016 Discount rate (a) 3.84 % 4.27 % 3.34 % 3.57 % Rate of compensation increase (b) 3.56 3.58 * * Health care cost trend rate for the next year (c) 6.75 % 7.00 % Effect on accumulated postretirement benefit obligation One percent increase $ 3 $ 4 One percent decrease (3 ) (4 ) (a) The discount rates were developed using a cash flow matching bond model with a modified duration for the qualified pension plan, non-qualified (b) Determined on an active liability-weighted basis. (c) The 2017 and 2016 rates are assumed to decrease gradually to 5.00 percent by 2025 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) 2017 2016 2015 2017 2016 2015 Discount rate (a) 4.27 % 4.45 % 4.13 % 3.57 % 3.59 % 3.46 % Expected return on plan assets (b) 7.25 7.50 7.50 3.50 1.50 1.50 Rate of compensation increase (c) 3.58 4.06 4.07 * * * Health care cost trend rate (d) Prior to age 65 7.00 % 6.50 % 7.00 % After age 65 7.00 6.50 7.00 Effect on 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 plan, non-qualified (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 2017 pre-65 post-65 pre-65 post-65 * Not applicable Investment Policies and Asset Allocation 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 mid-small At December 31, 2017 and 2016, plan assets of the qualified pension plan included an asset management arrangement with related party totaling $798 million and $48 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 21 for further discussion on these levels. The assets of the qualified pension plan 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 plan also invests in U.S. agency, corporate and municipal debt securities, which are all valued based on observable market prices or data by third-party pricing services, and mutual funds which are valued based on quoted net asset values provided by the trustee of the fund; these assets are classified as Level 2. Additionally, the qualified pension plan invests in certain assets that are valued based on net asset values as a practical expedient, including investments in collective investment funds, hedge funds, and private equity funds; the net asset values are provided by the fund trustee or administrator and are not classified in the fair value hierarchy. The following table summarizes plan investment assets measured at fair value at December 31: Qualified Pension Plan Postretirement 2017 2016 2017 2016 (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 1 Cash and cash equivalents $ 727 (a) $ – $ – $ 727 $ 49 $ – $ – $ 49 $ 36 $ 82 Debt securities 517 723 – 1,240 362 577 – 939 – – Corporate stock Real estate equity securities (b) 216 – – 216 169 – – 169 – – Mutual funds Debt securities – 205 – 205 – 164 – 164 – – Emerging markets equity securities – 120 – 120 – 155 – 155 – – Other – – 2 2 – – 1 1 – – $ 1,460 $ 1,048 $ 2 2,510 $ 580 $ 896 $ 1 1,477 36 82 Plan investment assets not classified in fair value hierarchy (f) Collective investment funds Domestic equity securities 1,327 977 29 – Mid-small (c) 346 303 – – International equity securities 934 725 22 – Hedge funds (d) 200 188 – – Private equity funds (e) 165 99 – – Total plan investment assets at fair value $ 5,482 $ 3,769 $ 87 $ 82 (a) Includes an employer contribution made in late 2017, which was invested consistent with the plan’s target asset allocation, subsequent to December 31, 2017. (b) At December 31, 2017 and 2016, securities included $105 million and $98 million in domestic equities, respectively, and $111 million and $71 million in international equities, respectively. (c) At December 31, 2017 and 2016, securities included $346 million and $303 million in domestic equities, respectively. (d) This category consists of several investment strategies diversified across several hedge fund managers. (e) This category consists of several investment strategies diversified across several private equity fund managers. (f) These investments are valued based on net asset value per share as a practical expedient; fair values are provided to reconcile to total investment assets of the plans at fair value. The following table summarizes the changes in fair value for qualified pension plan investment assets measured at fair value using significant unobservable inputs (Level 3) for the years ended December 31: 2017 2016 2015 (Dollars in Millions) Other Other Other Balance at beginning of period $ 1 $ 1 $ 2 Unrealized gains (losses) relating to assets still held at end of year – – (1 ) Purchases, sales, and settlements, net 1 – – Balance at end of period $ 2 $ 1 $ 1 The following benefit payments are expected to be paid from the retirement plans for the years ended December 31: (Dollars in Millions) Pension Postretirement (a) Medicare Part D 2018 $ 201 $ 10 $ 2 2019 215 9 1 2020 232 9 1 2021 250 8 1 2022 260 8 1 2023 – 2027 1,564 29 4 (a) Net of expected retiree contributions and before Medicare Part D subsidy.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	NOTE 17 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 common stock, based on the conversion terms of the various merger agreements. At December 31, 2017, there were 37 million shares (subject to adjustment for forfeitures) available for grant under the Company’s stock incentive plan. 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- Average Weighted-Average Aggregate (in millions) 2017 Number outstanding at beginning of period 17,059,241 $ 29.95 Granted 1,066,188 54.97 Exercised (5,389,741 ) 29.58 Cancelled (a) (67,221 ) 43.31 Number outstanding at end of period (b) 12,668,467 $ 32.15 4.5 $ 272 Exercisable at end of period 9,647,937 $ 27.87 3.3 $ 248 2016 Number outstanding at beginning of period 25,725,708 $ 29.82 Granted 1,644,288 39.50 Exercised (10,163,668 ) 31.09 Cancelled (a) (147,087 ) 35.18 Number outstanding at end of period (b) 17,059,241 $ 29.95 4.1 $ 365 Exercisable at end of period 13,856,142 $ 27.53 3.1 $ 330 2015 Number outstanding at beginning of period 33,649,198 $ 29.31 Granted 1,122,697 44.28 Exercised (8,721,834 ) 29.59 Cancelled (a) (324,353 ) 32.93 Number outstanding at end of period (b) 25,725,708 $ 29.82 3.6 $ 331 Exercisable at end of period 22,446,095 $ 28.68 3.0 $ 314 (a) Options cancelled include both non-vested (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 2017 2016 2015 Estimated fair value $ 14.66 $ 10.28 $ 12.23 Risk-free interest rates 2.0 % 1.3 % 1.7 % Dividend yield 2.6 % 2.6 % 2.6 % Stock volatility factor .35 .36 .37 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 common 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) 2017 2016 2015 Fair value of options vested $ 13 $ 18 $ 25 Intrinsic value of options exercised 127 138 130 Cash received from options exercised 159 316 257 Tax benefit realized from options exercised 49 53 50 To satisfy option exercises, the Company predominantly uses treasury stock. Additional information regarding stock options outstanding as of December 31, 2017, is as follows: Outstanding Options Exercisable Options Range of Exercise Prices Shares Weighted- Weighted- Shares Weighted- $11.02 – $20.00 1,562,979 1.2 $ 11.95 1,562,979 $ 11.95 $20.01 – $25.00 1,363,504 2.2 23.85 1,363,504 23.85 $25.01 – $30.00 3,661,570 3.4 28.21 3,661,570 28.21 $30.01 – $35.00 1,519,505 2.6 33.37 1,519,505 33.37 $35.01 – $40.00 1,534,333 8.1 39.49 355,492 39.49 $40.01 – $45.00 1,971,691 6.6 42.33 1,184,802 41.92 $50.01 – $55.01 1,054,885 9.1 54.97 85 55.01 12,668,467 4.5 $ 32.15 9,647,937 $ 27.87 Restricted Stock and Unit Awards A summary of the status of the Company’s restricted shares of stock and unit awards is presented below: 2017 2016 2015 Year Ended December 31 Shares Weighted- Average Grant- Date Fair Value Shares Weighted- Average Grant- Date Fair Value Shares Weighted- Average Grant- Date Fair Value Outstanding at beginning of period 8,265,507 $ 39.50 6,894,831 $ 38.44 7,921,571 $ 34.09 Granted 2,850,927 54.45 4,879,421 39.65 2,897,396 44.24 Vested (3,295,376 ) 40.66 (3,069,035 ) 37.25 (3,428,736 ) 33.27 Cancelled (374,103 ) 43.91 (439,710 ) 40.18 (495,400 ) 38.66 Outstanding at end of period 7,446,955 $ 44.49 8,265,507 $ 39.50 6,894,831 $ 38.44 The total fair value of shares vested was $180 million, $128 million and $152 million for the years ended December 31, 2017, 2016 and 2015, respectively. Stock-based compensation expense was $163 million, $150 million and $125 million for the years ended December 31, 2017, 2016 and 2015, respectively. On an after-tax

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 18 Income Taxes The components of income tax expense were: Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Federal Current $ 2,086 $ 2,585 $ 1,956 Deferred (1,180 ) (711 ) (223 ) Federal income tax 906 1,874 1,733 State Current 201 337 346 Deferred 157 (50 ) 18 State income tax 358 287 364 Total income tax provision $ 1,264 $ 2,161 $ 2,097 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) 2017 2016 2015 Tax at statutory rate $ 2,631 $ 2,837 $ 2,810 State income tax, at statutory rates, net of federal tax benefit 281 244 237 Tax effect of Revaluation of tax related assets and liabilities (a) (910 ) – – Tax credits and benefits, net of related expenses (774 ) (710 ) (700 ) Tax-exempt (200 ) (196 ) (201 ) Noncontrolling interests (12 ) (20 ) (19 ) Nondeductible legal and regulatory expenses 213 30 – Other items 35 (b) (24 ) (30 ) (c) Applicable income taxes $ 1,264 $ 2,161 $ 2,097 (a) In late 2017, tax reform legislation was enacted that, among other provisions, reduced the federal statutory rate for corporations from 35 percent to 21 percent effective in 2018. In accordance with generally accepted accounting principles, the Company revalued its deferred tax assets and liabilities at December 31, 2017, resulting in an estimated net tax benefit of $910 million, which the Company recorded in 2017. (b) Includes excess tax benefits associated with stock-based compensation under accounting guidance effective January 1, 2017. Previously, these benefits were recorded in capital surplus. (c) Includes the resolution of certain tax matters with taxing authorities in the first quarter of 2015. The tax effects of fair value adjustments on securities available-for-sale, 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 through 2016 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) 2017 2016 2015 Balance at beginning of period $ 302 $ 243 $ 267 Additions (reductions) for tax positions taken in prior years 3 57 (17 ) Additions for tax positions taken in the current year 9 12 13 Exam resolutions (23 ) (6 ) (17 ) Statute expirations (4 ) (4 ) (3 ) Balance at end of period $ 287 $ 302 $ 243 The total amount of unrecognized tax positions that, if recognized, would impact the effective income tax rate as of December 31, 2017, 2016 and 2015, were $265 million, $234 million and $165 million, respectively. The Company classifies interest and penalties related to unrecognized tax positions as a component of income tax expense. At December 31, 2017, the Company’s unrecognized tax position balance included $53 million in accrued interest. During the years ended December 31, 2017, 2016 and 2015 the Company recorded approximately $16 million, $7 million and $(1) million, respectively, in interest on unrecognized tax positions. 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) 2017 2016 Deferred Tax Assets Federal, state and foreign net operating loss and credit carryforwards $ 2,249 $ 971 Allowance for credit losses 1,116 1,667 Accrued expenses 468 806 Partnerships and other investment assets 252 521 Securities available-for-sale 111 220 Stock compensation 79 120 Pension and postretirement benefits – 394 Other deferred tax assets, net 215 291 Gross deferred tax assets 4,490 4,990 Deferred Tax Liabilities Leasing activities (2,277 ) (3,096 ) Goodwill and other intangible assets (693 ) (962 ) Mortgage servicing rights (604 ) (883 ) Loans (160 ) (234 ) Pension and postretirement benefits (20 ) – Fixed assets (4 ) (60 ) Other deferred tax liabilities, net (131 ) (113 ) Gross deferred tax liabilities (3,889 ) (5,348 ) Valuation allowance (128 ) (121 ) Net Deferred Tax Asset (Liability) $ 473 $ (479 ) The Company has approximately $1.7 billion of federal, state and foreign net operating loss carryforwards which expire at various times through 2037. A substantial portion of these carryforwards relate to state-only net operating losses, which are subject to a full valuation allowance as they are not expected to be realized within the carryforward period. 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. In addition, the Company has $2.1 billion of federal credit carryforwards which expire at various times through 2037 which are not subject to a valuation allowance as management believes that it is more likely than not that the credits will be utilized within the carryforward period. At December 31, 2017, 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 certain subsidiaries of the Company 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, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	NOTE 19 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 fair value hedge, cash flow hedge, 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 Cash Flow Hedges (net-of-tax) (net-of-tax) (net-of-tax). Net Investment Hedges non-derivative non-derivative non-derivative Other Derivative Positions to-be-announced non-derivative 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 In Years Notional Fair Weighted-Average In Years December 31, 2017 Fair value hedges Interest rate contracts Receive fixed/pay floating swaps $ 1,000 $ 28 6.70 $ 3,600 $ 16 1.55 Cash flow hedges Interest rate contracts Pay fixed/receive floating swaps 3,772 5 6.73 – – – Net investment hedges Foreign exchange forward contracts – – – 373 8 .05 Other economic hedges Interest rate contracts Futures and forwards Buy 1,632 7 .10 1,326 2 .04 Sell 15,291 10 .89 4,511 10 .03 Options Purchased 4,985 65 7.57 – – – Written 1,285 21 .10 5 – .05 Receive fixed/pay floating swaps 2,019 5 16.49 5,469 – 8.43 Pay fixed/receive floating swaps 4,844 21 7.69 46 1 6.70 Foreign exchange forward contracts 147 1 .02 669 8 .04 Equity contracts 45 – 1.10 88 1 .58 Credit contracts 1,559 – 3.41 3,779 1 3.16 Other (a) – – – 1,164 125 2.50 Total $ 36,579 $ 163 $ 21,030 $ 172 December 31, 2016 Fair value hedges Interest rate contracts Receive fixed/pay floating swaps $ 2,550 $ 49 4.28 $ 1,250 $ 12 2.32 Cash flow hedges Interest rate contracts Pay fixed/receive floating swaps 3,272 108 8.63 2,787 35 .83 Net investment hedges Foreign exchange forward contracts 1,347 15 .04 – – – Other economic hedges Interest rate contracts Futures and forwards Buy 1,748 13 .09 1,722 18 .05 Sell 2,278 129 .08 4,214 43 .09 Options Purchased 1,565 43 8.60 – – – Written 1,073 25 .07 12 1 .06 Receive fixed/pay floating swaps 6,452 26 11.48 1,561 16 6.54 Pay fixed/receive floating swaps 4,705 13 6.51 2,320 9 7.80 Foreign exchange forward contracts 849 6 .02 867 6 .02 Equity contracts 11 – .40 102 1 .57 Credit contracts 1,397 – 3.38 3,674 2 3.57 Other (a) 19 – .03 830 106 3.42 Total $ 27,266 $ 427 $ 19,339 $ 249 (a) Includes 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 $1.2 billion, $125 million and 2.50 years at December 31, 2017, respectively, compared to $811 million, $106 million and 3.50 years at December 31, 2016, respectively. In addition, includes short-term underwriting purchase and sale commitments with total asset and liability notional values of $19 million at December 31, 2016. 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 December 31, 2017 Interest rate contracts Receive fixed/pay floating swaps $ 28,681 $ 679 5.71 $ 59,990 $ 840 4.27 Pay fixed/receive floating swaps 63,038 860 4.20 25,093 602 5.76 Options Purchased 29,091 22 1.61 880 14 4.24 Written 880 15 4.24 27,056 20 1.50 Futures Sell 7,007 4 1.21 – – – Foreign exchange rate contracts Forwards, spots and swaps 24,099 656 .81 23,440 636 .83 Options Purchased 4,026 83 1.20 – – – Written – – – 4,026 83 1.20 Total $ 156,822 $ 2,319 $ 140,485 $ 2,195 December 31, 2016 Interest rate contracts Receive fixed/pay floating swaps $ 38,501 $ 930 4.07 $ 39,403 $ 632 4.89 Pay fixed/receive floating swaps 36,671 612 4.99 40,324 996 4.07 Options Purchased 14,545 51 1.85 125 2 1.37 Written 125 3 1.37 13,518 50 1.70 Futures Buy 306 – 1.96 7,111 7 .90 Foreign exchange rate contracts Forwards, spots and swaps 20,664 849 .58 19,640 825 .60 Options Purchased 2,376 98 1.67 – – – Written – – – 2,376 98 1.67 Total $ 113,188 $ 2,543 $ 122,497 $ 2,610 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) Gains (Losses) Recognized in Other Gains (Losses) Reclassified from (Dollars in Millions) 2017 2016 2015 2017 2016 2015 Asset and Liability Management Positions Cash flow hedges Interest rate contracts (a) $ (3 ) $ 46 $ (15 ) $ (19 ) $ (76 ) $ (120 ) Net investment hedges Foreign exchange forward contracts (56 ) 33 101 – – – Non-derivative (46 ) – – – – – Note: Ineffectiveness on cash flow and net investment hedges was not material for the years ended December 31, 2017, 2016 and 2015. (a) Gains (Losses) reclassified from other comprehensive income (loss) into interest expense. 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) 2017 2016 2015 Asset and Liability Management Positions Fair value hedges (a) Interest rate contracts Other noninterest income $ (28 ) $ (31 ) $ 7 Other economic hedges Interest rate contracts Futures and forwards Mortgage banking revenue 24 101 186 Purchased and written options Mortgage banking revenue 237 331 191 Receive fixed/pay floating swaps Mortgage banking revenue 255 226 139 Pay fixed/receive floating swaps Mortgage banking revenue (220 ) (140 ) (33 ) Foreign exchange forward contracts Commercial products revenue (69 ) (14 ) 108 Equity contracts Compensation expense 1 1 (1 ) Credit contracts Other noninterest income 3 1 2 Other Other noninterest income (1 ) (39 ) – Customer-Related Positions Interest rate contracts Receive fixed/pay floating swaps Other noninterest income (876 ) (708 ) 360 Pay fixed/receive floating swaps Other noninterest income 943 769 (320 ) Purchased and written options Other noninterest income (24 ) (5 ) 3 Futures Other noninterest income (3 ) (6 ) 1 Foreign exchange rate contracts Forwards, spots and swaps Commercial products revenue 92 88 74 Purchased and written options Commercial products revenue 2 (1 ) 2 (a) Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $28 million, $31 million and $(7) million for the years ended December 31, 2017, 2016 and 2015, respectively. The ineffective portion was immaterial for the years ended December 31, 2017, 2016 and 2015. 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 derivative positions that are centrally cleared through clearinghouses, 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 generally 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 net liability thresholds and may be 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, 2017, was $577 million. At December 31, 2017, the Company had $527 million of cash posted as collateral against this net liability position.

Netting Arrangements for Certai

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Netting Arrangements for Certain Financial Instruments and Securities Financing Activities	NOTE 20 Netting Arrangements for Certain Financial Instruments and Securities Financing Activities The Company’s derivative portfolio consists of bilateral over-the-counter over-the-counter 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. The securities transferred under repurchase and reverse repurchase transactions typically are U.S. Treasury and agency securities, residential agency mortgage-backed securities or corporate debt securities. The securities loaned or borrowed typically are corporate debt securities 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. Repurchase/reverse repurchase and securities loaned/borrowed transactions expose the Company to counterparty risk. The Company manages this risk by performing assessments, independent of business line managers, and establishing concentration limits on each counterparty. Additionally, these transactions include collateral arrangements that require the fair values of the underlying securities to be determined daily, resulting in cash being obtained or refunded to counterparties to maintain specified collateral levels. The following table summarizes the maturities by category of collateral pledged for repurchase agreements and securities loaned transactions: (Dollars in Millions) Overnight and Less Than Total December 31, 2017 Repurchase agreements U.S. Treasury and agencies $ 25 $ – $ 25 Residential agency mortgage-backed securities 644 30 674 Corporate debt securities 104 – 104 Total repurchase agreements 773 30 803 Securities loaned Corporate debt securities 111 – 111 Total securities loaned 111 – 111 Gross amount of recognized liabilities $ 884 $ 30 $ 914 December 31, 2016 Repurchase agreements U.S. Treasury and agencies $ 60 $ – $ 60 Residential agency mortgage-backed securities 681 30 711 Corporate debt securities 30 – 30 Total repurchase agreements 771 30 801 Securities loaned Corporate debt securities 223 – 223 Total securities loaned 223 – 223 Gross amount of recognized liabilities $ 994 $ 30 $ 1,024 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 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 certain centrally cleared derivative contracts due to current uncertainty about the legal enforceability of netting arrangements. 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 Recognized Gross Amounts Consolidated (a) Net Amounts Consolidated Gross Amounts Not Offset on (Dollars in Millions) Financial (b) Collateral (c) Net December 31, 2017 Derivative assets (d) $ 1,759 $ (652 ) $ 1,107 $ (110 ) $ (5 ) $ 992 Reverse repurchase agreements 24 – 24 (24 ) – – Securities borrowed 923 – 923 – (896 ) 27 Total $ 2,706 $ (652 ) $ 2,054 $ (134 ) $ (901 ) $ 1,019 December 31, 2016 Derivative assets (d) $ 2,122 $ (984 ) $ 1,138 $ (78 ) $ (10 ) $ 1,050 Reverse repurchase agreements 77 – 77 (60 ) (17 ) – Securities borrowed 944 – 944 (10 ) (909 ) 25 Total $ 3,143 $ (984 ) $ 2,159 $ (148 ) $ (936 ) $ 1,075 (a) Includes $50 million and $210 million of cash collateral related payables that were netted against derivative assets at December 31, 2017 and 2016, 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 $723 million and $848 million at December 31, 2017 and 2016, respectively, of derivative assets not subject to netting arrangements or where uncertainty exists regarding legal enforceability of the netting arrangements. Gross Recognized Gross Amounts Consolidated (a) Net Amounts Consolidated Gross Amounts Not Offset on (Dollars in Millions) Financial (b) Collateral (c) Net December 31, 2017 Derivative liabilities (d) $ 1,629 $ (1,130 ) $ 499 $ (110 ) $ – $ 389 Repurchase agreements 803 – 803 (24 ) (779 ) – Securities loaned 111 – 111 – (110 ) 1 Total $ 2,543 $ (1,130 ) $ 1,413 $ (134 ) $ (889 ) $ 390 December 31, 2016 Derivative liabilities (d) $ 1,951 $ (1,185 ) $ 766 $ (78 ) $ – $ 688 Repurchase agreements 801 – 801 (60 ) (741 ) – Securities loaned 223 – 223 (10 ) (211 ) 2 Total $ 2,975 $ (1,185 ) $ 1,790 $ (148 ) $ (952 ) $ 690 (a) Includes $528 million and $411 million of cash collateral related receivables that were netted against derivative liabilities at December 31, 2017 and 2016, 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 $738 million and $908 million at December 31, 2017 and 2016, respectively, of derivative liabilities not subject to netting arrangements or where uncertainty exists regarding legal enforceability of the netting arrangements.

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities	NOTE 21 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 lower-of-cost-or-fair 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. – 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, 2017, 2016 and 2015, 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, 2017, 2016 and 2015, there were no significant changes to the valuation techniques used by the Company to measure fair value. Cash and Due From Banks Federal Funds Sold and Securities Purchased Under Resale Agreements Investment 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 relevant market data. Level 2 investment securities are predominantly agency mortgage-backed securities, certain other asset-backed securities, obligations of state and political subdivisions and agency debt 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 and broker provided quotes, where available. Securities classified within Level 3 include non-agency non-agency available-for-sale Mortgage Loans Held For Sale Loans non-recurring Mortgage Servicing Rights Derivatives over-the-counter 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 Other Financial Instruments tax-advantaged tax-advantaged tax-advantaged tax-advantaged tax-advantaged tax-advantaged Deposit Liabilities Short-term Borrowings Long-term Debt Loan Commitments, Letters of Credit and Guarantees 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 OREO. 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 available-for-sale 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. At December 31, 2017, the Company did not have any available-for-sale Mortgage Servicing Rights The following table shows the significant valuation assumption ranges for MSRs at December 31, 2017: Minimum Maximum Average Expected prepayment 6 % 17 % 10 % Option adjusted spread 7 10 8 Derivatives 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, 2017: Minimum Maximum Average Expected loan close rate 6 % 100 % 80 % Inherent MSR value (basis points per loan) (1 ) 184 117 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, 2017, the minimum, maximum and average credit valuation adjustment as a percentage of the derivative contract fair value prior to adjustment was 0 percent, 98 percent and 2 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, 2017 Available-for-sale U.S. Treasury and agencies $ 22,572 $ 729 $ – $ – $ 23,301 Mortgage-backed securities Residential Agency – 38,031 – – 38,031 Commercial Agency – 6 – – 6 Asset-backed securities Other – 419 – – 419 Obligations of state and political subdivisions – 6,358 – – 6,358 Other investments 22 – – – 22 Total available-for-sale 22,594 45,543 – – 68,137 Mortgage loans held for sale – 3,534 – – 3,534 Mortgage servicing rights – – 2,645 – 2,645 Derivative assets 6 1,960 516 (652 ) 1,830 Other assets 154 1,163 – – 1,317 Total $ 22,754 $ 52,200 $ 3,161 $ (652 ) $ 77,463 Derivative liabilities $ – $ 1,958 $ 409 $ (1,130 ) $ 1,237 Short-term borrowings and other liabilities (c) 101 894 – – 995 Total $ 101 $ 2,852 $ 409 $ (1,130 ) $ 2,232 December 31, 2016 Available-for-sale U.S. Treasury and agencies $ 16,355 $ 772 $ – $ – $ 17,127 Mortgage-backed securities Residential Agency – 43,138 – – 43,138 Non-agency Prime (a) – – 242 – 242 Non-prime (b) – – 195 – 195 Commercial Agency – 15 – – 15 Asset-backed securities Other – 481 2 – 483 Obligations of state and political subdivisions – 5,039 – – 5,039 Corporate debt securities – – 9 – 9 Other investments 36 – – – 36 Total available-for-sale 16,391 49,445 448 – 66,284 Mortgage loans held for sale – 4,822 – – 4,822 Mortgage servicing rights – – 2,591 – 2,591 Derivative assets – 2,416 554 (984 ) 1,986 Other assets 183 1,137 – – 1,320 Total $ 16,574 $ 57,820 $ 3,593 $ (984 ) $ 77,003 Derivative liabilities $ 7 $ 2,469 $ 383 $ (1,185 ) $ 1,674 Short-term borrowings and other liabilities (c) 142 938 – – 1,080 Total $ 149 $ 3,407 $ 383 $ (1,185 ) $ 2,754 (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, (b) Includes all securities not meeting the conditions to be designated as prime. (c) Primarily 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 Gains Purchases Sales Principal Issuances Settlements End of Balance Net Change Held at End of Period 2017 Available-for-sale Mortgage-backed securities Residential non-agency Prime (a) $ 242 $ – $ (2 ) $ – $ (234 ) $ (6 ) $ – $ – $ – $ – Non-prime (b) 195 – (17 ) – (175 ) (3 ) – – – – Asset-backed securities Other 2 – – – (2 ) – – – – – Corporate debt securities 9 – 2 – (11 ) – – – – – Total available-for-sale 448 – (17 ) (e) – (422 ) (9 ) – – – – Mortgage servicing rights 2,591 (404 ) (c) – 13 – – 445 (f) – 2,645 (404 ) (c) Net derivative assets and liabilities 171 317 (d) – 1 (10 ) – – (372 ) 107 (52 ) (g) 2016 Available-for-sale Mortgage-backed securities Residential non-agency Prime (a) $ 318 $ (1 ) $ – $ – $ – $ (75 ) $ – $ – $ 242 $ – Non-prime (b) 240 (1 ) (2 ) – – (42 ) – – 195 (2 ) Asset-backed securities Other 2 – – – – – – – 2 – Corporate debt securities 9 – – – – – – – 9 – Total available-for-sale 569 (2 ) (h) (2 ) (e) – – (117 ) – – 448 (2 ) Mortgage servicing rights 2,512 (488 ) (c) – 43 – – 524 (f) – 2,591 (488 ) (c) Net derivative assets and liabilities 498 332 (i) – 2 (14 ) – – (647 ) 171 (257 ) (j) 2015 Available-for-sale Mortgage-backed securities Residential non-agency Prime (a) $ 405 $ – $ (4 ) $ – $ – $ (83 ) $ – $ – $ 318 $ (4 ) Non-prime (b) 280 (1 ) (1 ) – – (38 ) – – 240 (1 ) Asset-backed securities Other 62 4 (2 ) – (51 ) (11 ) – – 2 – Corporate debt securities 9 – – – – – – – 9 – Total available-for-sale 756 3 (k) (7 ) (e) – (51 ) (132 ) – – 569 (5 ) Mortgage servicing rights 2,338 (487 ) (c) – 29 – – 632 (f) – 2,512 (487 ) (c) Net derivative assets and liabilities 574 707 (l) – 1 (13 ) – – (771 ) 498 135 (m) (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, (b) Includes all securities not meeting the conditions to be designated as prime. (c) Included in mortgage banking revenue. (d) Approximately $21 million included in other noninterest income and $296 million included in mortgage banking revenue. (e) Included in changes in unrealized gains and losses on securities available-for-sale. (f) Represents MSRs capitalized during the period. (g) Approximately $(77) million included in other noninterest income and $25 million included in mortgage banking revenue. (h) Approximately $(3) million included in securities gains (losses) and $1 million included in interest income. (i) Approximately $(77) million included in other noninterest income and $409 million included in mortgage banking revenue. (j) Approximately $(276) million included in other noninterest income and $19 million included in mortgage banking revenue. (k) Included in interest income. (l) Approximately $289 million included in other noninterest income and $418 million included in mortgage banking revenue. (m) Approximately $92 million included in other noninterest income and $43 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 The following table summarizes the balances as of the measurement date of assets measured at fair value on a nonrecurring basis, and still held as of December 31: 2017 2016 (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Loans (a) $ – $ – $ 150 $ 150 $ – $ – $ 59 $ 59 Other assets (b) – – 31 31 – – 60 60 (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) 2017 2016 2015 Loans (a) $ 171 $ 192 $ 175 Other assets (b) 20 32 42 (a) Represents write-downs of student loans held for sale based on non-binding 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: 2017 2016 (Dollars in Millions) Fair Value Aggregate Carrying Fair Value Aggregate Carrying Total loans $ 3,534 $ 3,434 $ 100 $ 4,822 $ 4,763 $ 59 Nonaccrual loans 1 2 (1 ) 2 3 (1 ) Loans 90 days or more past due 1 1 – 1 1 – Disclosures About Fair Value of Financial Instruments The following table summarizes the estimated fair value for financial instruments as of December 31, 2017 and 2016, 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: 2017 2016 Carrying Fair Value Carrying Fair Value (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Financial Assets Cash and due from banks $ 19,505 $ 19,505 $ – $ – $ 19,505 $ 15,705 $ 15,705 $ – $ – $ 15,705 Federal funds sold and securities purchased under resale agreements 93 – 93 – 93 138 – 138 – 138 Investment securities held-to-maturity 44,362 4,613 39,095 15 43,723 42,991 4,605 37,810 20 42,435 Loans held for sale (a) 20 – – 20 20 4 – – 4 4 Loans 276,507 – – 279,391 279,391 269,394 – – 273,422 273,422 Other financial instruments 2,393 – 1,037 1,364 2,401 2,362 – 920 1,449 2,369 Financial Liabilities Deposits 347,215 – 346,979 – 346,979 334,590 – 334,361 – 334,361 Short-term borrowings (b) 15,656 – 15,447 – 15,447 12,891 – 12,706 – 12,706 Long-term debt 32,259 – 32,377 – 32,377 33,323 – 33,678 – 33,678 Other liabilities 1,556 – – 1,556 1,556 1,702 – – 1,702 1,702 (a) Excludes mortgages held for sale for which the fair value option under applicable accounting guidance was elected. (b) 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, deferred non-yield non-yield

Guarantees and Contingent Liabi

Guarantees and Contingent Liabilities	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Guarantees and Contingent Liabilities	NOTE 22 Guarantees and Contingent Liabilities Visa Restructuring and Card Association Litigation 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 pending in the United States District Court for the Eastern District of New York. This case is the largest of the remaining Visa Litigation matters. The district court approved the settlement, but that approval was appealed by certain class members. On June 30, 2016, the United States Court of Appeals for the Second Circuit reversed the approval of the settlement and remanded the case to the district court for further proceedings consistent with the appellate ruling. On November 23, 2016, certain class members filed a petition with the United States Supreme Court asking it to review the Second Circuit’s decision to reject the settlement. On March 27, 2017, the Supreme Court denied the class members’ petition. The case is proceeding in the district court. At December 31, 2017, 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 2017, the Company sold 2.2 million of its Class B shares. These sales, and any previous sales of its Class B shares, do not impact the Company’s liability for the Visa Litigation matters or the receivable related to the escrow account. Upon final settlement of the Visa Litigation, the remaining 2.7 million Class B shares held by the Company will be eligible for conversion to Class A shares of Visa Inc., which are publicly traded. The Class B shares are excluded from the Company’s financial instruments disclosures included in Note 21. Commitments to Extend Credit The contract or notional amounts of unfunded commitments to extend credit at December 31, 2017, excluding those commitments considered derivatives, were as follows: Term (Dollars in Millions) Less Than Greater Than Total Commercial and commercial real estate loans $ 28,903 $ 100,648 $ 129,551 Corporate and purchasing card loans (a) 26,002 – 26,002 Residential mortgages 216 3 219 Retail credit card loans (a) 106,285 – 106,285 Other retail loans 13,707 23,600 37,307 Covered loans – 126 126 Other 5,672 – 5,672 (a) Primarily cancelable at the Company’s discretion. Lease Commitments (Dollars in Millions) Capitalized Operating 2018 $ 17 $ 277 2019 16 250 2020 14 210 2021 11 185 2022 9 159 Thereafter 35 563 Total minimum lease payments 102 $ 1,644 Less amount representing interest 34 Present value of net minimum lease payments 68 Other Guarantees and Contingent Liabilities The following table is a summary of other guarantees and contingent liabilities of the Company at December 31, 2017: (Dollars in Millions) Collateral Carrying Maximum Standby letters of credit $ – $ 52 $ 10,857 Third party borrowing arrangements – – 7 Securities lending indemnifications 2,912 – 2,828 Asset sales – 125 6,683 Merchant processing 481 50 95,780 Tender option bond program guarantee 2,507 – 2,337 Minimum revenue guarantees – – 7 Other – 17 1,290 Letters of Credit The contract or notional amount of letters of credit at December 31, 2017, were as follows: Term (Dollars in Millions) Less Than Greater Than Total Standby $ 4,891 $ 5,966 $ 10,857 Commercial 398 24 422 Guarantees buy-back Third Party Borrowing Arrangements Commitments from Securities Lending Asset Sales tax-advantaged buy-back tax-qualifying buy-back tax-advantaged 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 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, 2017, the Company had reserved $13 million for potential losses from representation and warranty obligations, compared with $19 million at December 31, 2016. 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. As of December 31, 2017 and 2016, the Company had $9 million and $7 million, respectively, of unresolved representation and warranty claims from GSEs. The Company does not have a significant amount of unresolved claims from investors other than GSEs. Merchant Processing 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 $95.8 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 has been purchased but 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 and Mexico 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 future delivery, such as airline tickets, the Company could become financially liable for refunding the purchase price of such products or services 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, 2017, the value of airline tickets purchased to be delivered at a future date through card transactions processed by the Company was $6.6 billion. The Company held collateral of $378 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 $3 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, 2017, the liability was $37 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, 2017, the Company held $100 million of merchant escrow deposits as collateral and had a recorded liability for potential losses of $13 million. Tender Option Bond Program Guarantee available-for-sale Minimum Revenue Guarantees Other Guarantees and Commitments The Company has also made other financial performance guarantees and commitments primarily related to the operations of its subsidiaries. At December 31, 2017, the maximum potential future payments guaranteed or committed by the Company under these arrangements were approximately $609 million. Litigation and Regulatory Matters Litigation Matters Regulatory Matters The Company is cooperating fully with all pending 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). On February 13, 2018, the Company entered into a deferred prosecution agreement (the “DPA”) with the United States Attorney’s Office in Manhattan that resolves its investigation of the Company concerning a legacy banking relationship between U.S. Bank and payday lending businesses associated with former customer Scott Tucker and U.S. Bank’s legacy Bank Secrecy Act/anti-money laundering compliance program. Under the terms of the DPA, the Company settled all allegations with the United States Attorney’s Office for the sum of $528 million (which is being credited for the amount of the civil money penalty paid to the Office of the Comptroller of the Currency (the “OCC”), as described below for a net payment to the U.S. Attorney’s Office of $453 million) and agreed to, among other things, continue its ongoing efforts to implement and maintain an adequate Bank Secrecy Act/anti-money-laundering compliance program and to provide related reports to the U.S. Attorney’s Office. The DPA defers prosecution for a period of two years, subject to the Company’s compliance with its terms. If the Company violates the DPA, its term could be extended up to an additional one year, or the Company could be subject to a prosecution or civil action based on the matters that are the subject of the DPA. In addition, the Company and certain of its affiliates entered into related regulatory settlements with the OCC, the Financial Crimes Enforcement Network (“FinCEN”) and the Board of Governors of the Federal Reserve System (“Federal Reserve”). U.S. Bank consented to the issuance of a consent order and entered into a stipulation and consent to the issuance of an order for a civil money penalty with the OCC, and was assessed a civil money penalty of $75 million by the OCC, resulting from the OCC’s 2015 Consent Order (as described below) and related review of the Company’s legacy Bank Secrecy Act/anti-money laundering compliance program. U.S. Bank also entered into a related stipulation and order of dismissal with FinCEN, which requires, among other things, an ongoing commitment to provide resources to its Bank Secrecy Act/anti-money laundering compliance program and related reporting to FinCEN and provides for payment of a civil money penalty of $185 million (which will be deemed satisfied if the Company pays the penalty required under the DPA and also pays $70 million to FinCEN). In addition, the Company and USB Americas Holding Company, a subsidiary of U.S. Bank, entered into a consent order to cease and desist and order of assessment of a civil money penalty with the Federal Reserve concerning deficiencies in the Company’s firm-wide Bank Secrecy Act/anti-money laundering compliance program and sanctions compliance program, which requires the payment of a civil money penalty of $15 million and, among other things, enhancements related to those programs. The Company has paid a total of $613 million for the penalties described above. The Company had previously accrued amounts to cover each of these matters, which were reflected in the Company’s Consolidated Balance Sheet at December 31, 2017. In October 2015, the Company entered into a Consent Order with the OCC concerning deficiencies in the Company’s Bank Secrecy Act/anti-money laundering compliance program, and requiring an ongoing review of that program. Some of the compliance program enhancements and other actions required by the Consent Order have already been, or are currently in the process of being, implemented, and are not expected to be material to the Company. In April 2011, the Company and certain other large financial institutions entered into Consent Orders with the OCC and the Federal Reserve relating to residential mortgage servicing and foreclosure practices. In June 2015, the Company entered into an agreement to amend the 2011 Consent Order it had with the OCC. The OCC terminated the amended Consent Order in February 2016. The Federal Reserve terminated its 2011 Consent Order in January 2018. Outlook

U.S. Bancorp (Parent Company)

U.S. Bancorp (Parent Company)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
U.S. Bancorp (Parent Company)	NOTE 23 U.S. Bancorp (Parent Company) Condensed Balance Sheet At December 31 (Dollars in Millions) 2017 2016 Assets Due from banks, principally interest-bearing $ 9,157 $ 7,800 Available-for-sale 963 225 Investments in bank subsidiaries 46,435 44,955 Investments in nonbank subsidiaries 2,540 2,326 Advances to bank subsidiaries 3,300 3,800 Advances to nonbank subsidiaries 2,055 1,265 Other assets 1,079 1,052 Total assets $ 65,529 $ 61,423 Liabilities and Shareholders’ Equity Short-term funds borrowed $ 1 $ 22 Long-term debt 15,769 13,045 Other liabilities 719 1,058 Shareholders’ equity 49,040 47,298 Total liabilities and shareholders’ equity $ 65,529 $ 61,423 Condensed Income Statement Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Income Dividends from bank subsidiaries $ 4,800 $ 2,100 $ 3,900 Dividends from nonbank subsidiaries 5 4 3 Interest from subsidiaries 159 140 120 Other income 41 57 55 Total income 5,005 2,301 4,078 Expense Interest expense 402 327 292 Other expense 124 123 105 Total expense 526 450 397 Income before income taxes and equity in undistributed income of subsidiaries 4,479 1,851 3,681 Applicable income taxes (176 ) (97 ) (207 ) Income of parent company 4,655 1,948 3,888 Equity in undistributed income of subsidiaries 1,563 3,940 1,991 Net income attributable to U.S. Bancorp $ 6,218 $ 5,888 $ 5,879 Condensed Statement of Cash Flows Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Operating Activities Net income attributable to U.S. Bancorp $ 6,218 $ 5,888 $ 5,879 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed income of subsidiaries (1,563 ) (3,940 ) (1,991 ) Other, net (125 ) 75 507 Net cash provided by operating activities 4,530 2,023 4,395 Investing Activities Proceeds from sales and maturities of investment securities 100 232 153 Purchases of investment securities (844 ) (120 ) (47 ) Net increase in short-term advances to subsidiaries (790 ) (442 ) (273 ) Long-term advances to subsidiaries – (750 ) (500 ) Principal collected on long-term advances to subsidiaries 500 100 – Other, net (12 ) (12 ) (6 ) Net cash used in investing activities (1,046 ) (992 ) (673 ) Financing Activities Net decrease in short-term borrowings (21 ) (3 ) (152 ) Proceeds from issuance of long-term debt 3,920 3,550 – Principal payments or redemption of long-term debt (1,250 ) (1,926 ) (1,750 ) Proceeds from issuance of preferred stock 993 – 745 Proceeds from issuance of common stock 159 355 295 Repurchase of preferred stock (1,085 ) – – Repurchase of common stock (2,631 ) (2,556 ) (2,190 ) Cash dividends paid on preferred stock (284 ) (267 ) (242 ) Cash dividends paid on common stock (1,928 ) (1,810 ) (1,777 ) Net cash used in financing activities (2,127 ) (2,657 ) (5,071 ) Change in cash and due from banks 1,357 (1,626 ) (1,349 ) Cash and due from banks at beginning of year 7,800 9,426 10,775 Cash and due from banks at end of year $ 9,157 $ 7,800 $ 9,426 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, 2017
Subsequent Events [Abstract]
Subsequent Events	NOTE 24 Subsequent Events The Company has evaluated the impact of events that have occurred subsequent to December 31, 2017 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 Polici32

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation
Uses of Estimates	Uses of 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: Corporate and Commercial Banking non-profit Consumer and Business Banking on-line Wealth Management and Investment Services Payment Services Treasury and Corporate Support tax-advantaged Segment Results
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 Available-for-sale Available-for-sale Held-to-maturity Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase
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
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 Purchased Loans (non-impaired non-impaired 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 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 Allowance for Credit 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. 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 the selected loss experience is appropriate 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, less selling costs, 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, delinquency status, 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 The allowance for the covered loan segment is evaluated each quarter in a manner similar to that described for non-covered 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 each loan segment 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 and other relevant business practices; results of internal review; 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 off-balance Credit Quality 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, reducing interest income in the current period. 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 placed on nonaccrual. Consumer lending segment loans are generally charged-off 1-4 charge-off 1-4 family charged-off. charged-off 1-4 charged-off charged-off charge-off. 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 charged-off) Covered loans not considered to be purchased impaired are evaluated for delinquency, nonaccrual status and charge-off 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 loans not classified on the Company’s rating scale for problem credits, as minimal credit risk has been identified. Special mention loans are those loans that have a potential weakness deserving management’s close attention. Classified loans are those loans 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 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 For the commercial lending segment, modifications generally result in the Company working with borrowers on a case-by-case Modifications for the consumer lending segment are generally part of programs the Company has initiated. The Company modifies residential mortgage loans under Federal Housing Administration, United States Department of Veterans Affairs, or its own internal programs. Under these programs, the Company offers qualifying homeowners the opportunity to permanently modify their loan and achieve more affordable monthly payments by providing loan concessions. These 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 Impaired Loans 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 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. re-marketing Other Real Estate
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 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
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 a net 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 In the ordinary course of business, the Company recognizes income derived from various revenue generating activities. Certain revenues are generated from contracts where they are recognized when, or as services or products are transferred to customers for amounts the Company expects to be entitled. Revenue generating activities related to financial assets and liabilities are also recognized; including mortgage servicing fees, loan commitment fees, foreign currency remeasurements, and gains and losses on securities, equity investments and unconsolidated subsidiaries. Certain specific policies include the following: Credit and Debit Card Revenue Corporate Payment Products Revenue Merchant Processing Services point-of-sale ATM Processing Services Trust and Investment Management Fees Deposit Service Charges Treasury Management Fees Commercial Products Revenue non-yield Mortgage Banking Revenue Investment Products Fees Other Noninterest Income
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
Income Taxes	Income Taxes
Mortgage Servicing Rights	Mortgage Servicing Rights
Pensions	Pensions year-end
Premises and Equipment	Premises 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
Per Share Calculations	Per Share Calculations two-class two-class
Accounting Changes	Stock-Based Compensation Revenue Recognition Financial Instruments — Hedge Accounting Accounting for Leases Financial Instruments—Credit Losses
Accounting for Transfers and Servicing of Financial Assets	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 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 9. 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
Variable Interest Entities	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 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 typically 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 arrangements, 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. The securities transferred under repurchase and reverse repurchase transactions typically are U.S. Treasury and agency securities or residential agency mortgage-backed securities. The securities loaned or borrowed typically are corporate debt securities 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. Repurchase/reverse repurchase and securities loaned/borrowed transactions expose the Company to counterparty risk. The Company manages this risk by performing assessments, independent of business line managers, and establishing concentration limits on each counterparty. Additionally, these transactions include collateral arrangements that require the fair values of the underlying securities to be determined daily, resulting in cash being obtained or refunded to counterparties to maintain specified collateral levels. 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 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 certain centrally cleared derivative contracts due to current uncertainty about the legal enforceability of netting arrangements. 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 lower-of-cost-or-fair 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. – 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. 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 Polici33

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Line of Business Financial Performance	TABLE 25 Line of Business Financial Performance Corporate and Commercial Banking Consumer and Business Banking Year Ended December 31 (Dollars in Millions) 2017 2016 Percent 2017 2016 Percent Condensed Income Statement Net interest income (taxable-equivalent basis) $ 2,425 $ 2,241 8.2 % $ 5,117 $ 4,752 7.7 % Noninterest income 900 897 .3 2,445 2,526 (3.2 ) Securities gains (losses), net (3 ) 2 * – – – Total net revenue 3,322 3,140 5.8 7,562 7,278 3.9 Noninterest expense 1,566 1,440 8.8 5,117 5,058 1.2 Other intangibles 4 4 – 30 32 (6.3 ) Total noninterest expense 1,570 1,444 8.7 5,147 5,090 1.1 Income before provision and income taxes 1,752 1,696 3.3 2,415 2,188 10.4 Provision for credit losses (14 ) 365 * 354 93 * Income before income taxes 1,766 1,331 32.7 2,061 2,095 (1.6 ) Income taxes and taxable-equivalent adjustment 643 485 32.6 750 763 (1.7 ) Net income 1,123 846 32.7 1,311 1,332 (1.6 ) Net (income) loss attributable to noncontrolling interests – – – – – – Net income attributable to U.S. Bancorp $ 1,123 $ 846 32.7 $ 1,311 $ 1,332 (1.6 ) Average Balance Sheet Commercial $ 73,538 $ 70,856 3.8 % $ 10,163 $ 10,352 (1.8 )% Commercial real estate 20,456 21,183 (3.4 ) 18,437 18,231 1.1 Residential mortgages 6 8 (25.0 ) 55,960 53,402 4.8 Credit card – – – – – – Other retail – 2 * 53,296 50,247 6.1 Total loans, excluding covered loans 94,000 92,049 2.1 137,856 132,232 4.3 Covered loans – – – 3,445 4,196 (17.9 ) Total loans 94,000 92,049 2.1 141,301 136,428 3.6 Goodwill 1,647 1,647 – 3,681 3,682 – Other intangible assets 13 17 (23.5 ) 2,739 2,422 13.1 Assets 102,586 100,570 2.0 155,835 151,759 2.7 Noninterest-bearing deposits 36,001 36,912 (2.5 ) 27,983 27,516 1.7 Interest checking 9,950 8,616 15.5 47,332 43,593 8.6 Savings products 45,773 42,300 8.2 60,632 57,442 5.6 Time deposits 16,136 13,077 23.4 12,903 14,274 (9.6 ) Total deposits 107,860 100,905 6.9 148,850 142,825 4.2 Total U.S. Bancorp shareholders’ equity 9,872 8,996 9.7 11,468 11,192 2.5 * Not meaningful Wealth Management and Investment Services Payment Services Treasury and Corporate Support Consolidated Company 2017 2016 Percent 2017 2016 Percent 2017 2016 Percent 2017 2016 Percent $ 763 $ 537 42.1 % $ 2,223 $ 2,141 3.8 % $ 1,918 $ 2,060 (6.9 )% $ 12,446 $ 11,731 6.1 % 1,646 1,589 3.6 3,613 3,562 1.4 950 981 (3.2 ) 9,554 9,555 – – – – – – – 60 20 * 57 22 * 2,409 2,126 13.3 5,836 5,703 2.3 2,928 3,061 (4.3 ) 22,057 21,308 3.5 1,608 1,511 6.4 2,761 2,601 6.2 1,718 887 93.7 12,770 11,497 11.1 20 24 (16.7 ) 121 119 1.7 – – – 175 179 (2.2 ) 1,628 1,535 6.1 2,882 2,720 6.0 1,718 887 93.7 12,945 11,676 10.9 781 591 32.1 2,954 2,983 (1.0 ) 1,210 2,174 (44.3 ) 9,112 9,632 (5.4 ) (1 ) (4 ) 75.0 1,082 869 24.5 (31 ) 1 * 1,390 1,324 5.0 782 595 31.4 1,872 2,114 (11.4 ) 1,241 2,173 (42.9 ) 7,722 8,308 (7.1 ) 284 216 31.5 682 770 (11.4 ) (890 ) 130 * 1,469 2,364 (37.9 ) 498 379 31.4 1,190 1,344 (11.5 ) 2,131 2,043 4.3 6,253 5,944 5.2 – – – (13 ) (32 ) 59.4 (22 ) (24 ) 8.3 (35 ) (56 ) 37.5 $ 498 $ 379 31.4 $ 1,177 $ 1,312 (10.3 ) $ 2,109 $ 2,019 4.5 $ 6,218 $ 5,888 5.6 $ 3,434 $ 2,916 17.8 % $ 8,082 $ 7,535 7.3 % $ 687 $ 384 78.9 % $ 95,904 $ 92,043 4.2 % 508 523 (2.9 ) – – – 2,676 3,103 (13.8 ) 42,077 43,040 (2.2 ) 2,818 2,272 24.0 – – – – – – 58,784 55,682 5.6 – – – 20,906 20,490 2.0 – – – 20,906 20,490 2.0 1,660 1,557 6.6 460 524 (12.2 ) – – – 55,416 52,330 5.9 8,420 7,268 15.9 29,448 28,549 3.1 3,363 3,487 (3.6 ) 273,087 263,585 3.6 – – – – – – 5 30 (83.3 ) 3,450 4,226 (18.4 ) 8,420 7,268 15.9 29,448 28,549 3.1 3,368 3,517 (4.2 ) 276,537 267,811 3.3 1,568 1,567 .1 2,465 2,463 .1 – – – 9,361 9,359 – 81 101 (19.8 ) 401 493 (18.7 ) – – – 3,234 3,033 6.6 11,588 10,358 11.9 35,020 34,389 1.8 143,553 136,237 5.4 448,582 433,313 3.5 14,819 13,716 8.0 1,037 951 9.0 2,093 2,081 .6 81,933 81,176 .9 10,628 9,477 12.1 – – – 43 40 7.5 67,953 61,726 10.1 42,905 36,570 17.3 102 97 5.2 457 491 (6.9 ) 149,869 136,900 9.5 4,003 3,876 3.3 – – – 717 1,781 (59.7 ) 33,759 33,008 2.3 72,355 63,639 13.7 1,139 1,048 8.7 3,310 4,393 (24.7 ) 333,514 312,810 6.6 2,373 2,382 (.4 ) 6,269 6,389 (1.9 ) 18,484 18,380 .6 48,466 47,339 2.4

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Investment Securities	TABLE 13 Investment Securities Available-for-Sale Held-to-Maturity At December 31, 2017 (Dollars in Millions) Amortized Fair Weighted- Weighted- (e) Amortized Fair Weighted- Weighted- (e) U.S. Treasury and Agencies Maturing in one year or less $ 4,985 $ 4,965 .5 .85 % $ – $ – – – % Maturing after one year through five years 16,683 16,465 3.4 1.67 1,794 1,776 3.5 1.81 Maturing after five years through ten years 1,918 1,871 5.7 1.84 3,387 3,290 6.1 1.80 Maturing after ten years – – – – – – – – Total $ 23,586 $ 23,301 3.0 1.51 % $ 5,181 $ 5,066 5.2 1.80 % Mortgage-Backed Securities (a) Maturing in one year or less $ 79 $ 80 .5 4.33 % $ 85 $ 85 .5 2.99 % Maturing after one year through five years 17,637 17,424 4.4 2.08 23,307 22,968 3.8 2.10 Maturing after five years through ten years 18,391 18,179 5.9 2.22 15,497 15,305 5.7 2.31 Maturing after ten years 2,349 2,354 12.8 2.47 261 261 12.3 2.37 Total $ 38,456 $ 38,037 5.6 2.18 % $ 39,150 $ 38,619 4.6 2.19 % Asset-Backed Securities (a) Maturing in one year or less $ – $ – – – % $ – $ 1 .4 2.12 % Maturing after one year through five years 328 332 3.7 3.00 4 4 3.2 2.28 Maturing after five years through ten years 85 87 5.0 3.23 2 3 5.6 2.25 Maturing after ten years – – – – – 4 16.3 2.06 Total $ 413 $ 419 4.0 3.04 % $ 6 $ 12 4.1 2.27 % Obligations of State and Political Subdivisions (b)(c) Maturing in one year or less $ 183 $ 184 .2 7.40 % $ – $ – – – % Maturing after one year through five years 662 688 3.2 5.93 1 1 3.7 7.82 Maturing after five years through ten years 4,428 4,532 8.7 5.33 5 6 8.2 2.53 Maturing after ten years 967 954 19.8 5.02 – – – – Total $ 6,240 $ 6,358 9.6 5.41 % $ 6 $ 7 7.6 3.24 % Other Debt Securities Maturing in one year or less $ – $ – – – % $ – $ – – – % Maturing after one year through five years – – – – 19 19 2.5 2.26 Maturing after five years through ten years – – – – – – – – Maturing after ten years – – – – – – – – Total $ – $ – – – % $ 19 $ 19 2.5 2.26 % Other Investments $ 22 $ 22 – .01 % $ – $ – – – % Total investment securities (d) $ 68,717 $ 68,137 5.1 2.25 % $ 44,362 $ 43,723 4.7 2.14 % (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 held-to-maturity (e) Weighted-average yields for obligations of state and political subdivisions are presented on a fully-taxable equivalent basis under a federal income tax rate of 35 percent for the periods presented. Yields on available-for-sale held-to-maturity available-for-sale held-to-maturity. 2017 2016 At December 31 (Dollars in Millions) Amortized Percent Amortized Percent U.S. Treasury and agencies $ 28,767 25.5 % $ 22,560 20.5 % Mortgage-backed securities 77,606 68.6 81,698 74.3 Asset-backed securities 419 .4 483 .4 Obligations of state and political subdivisions 6,246 5.5 5,173 4.7 Other debt securities and investments 41 – 62 .1 Total investment securities $ 113,079 100.0 % $ 109,976 100.0 %
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 available-for-sale 2017 2016 Unrealized Losses Unrealized Losses (Dollars in Millions) Amortized Unrealized Other-than- (e) Other (f) Fair Value Amortized Unrealized Other-than- (e) Other (f) Fair Value Held-to-maturity (a) U.S. Treasury and agencies $ 5,181 $ 5 $ – $ (120 ) $ 5,066 $ 5,246 $ 12 $ – $ (132 ) $ 5,126 Mortgage-backed securities Residential Agency 39,150 48 – (579 ) 38,619 37,706 85 – (529 ) 37,262 Non-agency non-prime (d) – – – – – 1 – – – 1 Asset-backed securities Collateralized debt obligations/Collateralized loan obligations – 4 – – 4 – 5 – – 5 Other 6 2 – – 8 8 3 – – 11 Obligations of state and political subdivisions 6 1 – – 7 6 1 – – 7 Obligations of foreign governments 7 – – – 7 9 – – – 9 Other debt securities 12 – – – 12 15 – – (1 ) 14 Total held-to-maturity $ 44,362 $ 60 $ – $ (699 ) $ 43,723 $ 42,991 $ 106 $ – $ (662 ) $ 42,435 (a) Held-to-maturity available-for-sale held-to-maturity (b) Available-for-sale (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-to-value loan-to-value (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 available-for-sale 2017 2016 Unrealized Losses Unrealized Losses (Dollars in Millions) Amortized Unrealized Other-than- (e) Other (f) Fair Value Amortized Unrealized Other-than- (e) Other (f) Fair Value Available-for-sale (b) U.S. Treasury and agencies $ 23,586 $ 3 $ – $ (288 ) $ 23,301 $ 17,314 $ 11 $ – $ (198 ) $ 17,127 Mortgage-backed securities Residential Agency 38,450 152 – (571 ) 38,031 43,558 225 – (645 ) 43,138 Non-agency Prime (c) – – – – – 240 6 (3 ) (1 ) 242 Non-prime (d) – – – – – 178 20 (3 ) – 195 Commercial agency 6 – – – 6 15 – – – 15 Other asset-backed securities 413 6 – – 419 475 8 – – 483 Obligations of state and political subdivisions 6,240 147 – (29 ) 6,358 5,167 55 – (183 ) 5,039 Corporate debt securities – – – – – 11 – – (2 ) 9 Other investments 22 – – – 22 27 9 – – 36 Total available-for-sale $ 68,717 $ 308 $ – $ (888 ) $ 68,137 $ 66,985 $ 334 $ (6 ) $ (1,029 ) $ 66,284 (a) Held-to-maturity available-for-sale held-to-maturity (b) Available-for-sale (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-to-value loan-to-value (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 Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Taxable $ 2,043 $ 1,878 $ 1,778 Non-taxable 189 200 223 Total interest income from investment securities $ 2,232 $ 2,078 $ 2,001
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 Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Realized gains $ 75 $ 93 $ 7 Realized losses (18 ) (66 ) (6 ) Net realized gains (losses) $ 57 $ 27 $ 1 Income tax (benefit) on net realized gains (losses) $ 22 $ 10 $ –
Gross Unrealized Losses and Fair Value of Company's Investment Securities	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, 2017: Less Than 12 Months 12 Months or Greater Total (Dollars in Millions) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Held-to-maturity U.S. Treasury and agencies $ 2,109 $ (18 ) $ 2,596 $ (102 ) $ 4,705 $ (120 ) Residential agency mortgage-backed securities 17,484 (152 ) 15,308 (427 ) 32,792 (579 ) Other asset-backed securities – – 2 – 2 – Other debt securities – – 12 – 12 – Total held-to-maturity $ 19,593 $ (170 ) $ 17,918 $ (529 ) $ 37,511 $ (699 ) Available-for-sale U.S. Treasury and agencies $ 13,911 $ (128 ) $ 9,124 $ (160 ) $ 23,035 $ (288 ) Residential agency mortgage-backed securities 9,132 (75 ) 20,635 (496 ) 29,767 (571 ) Obligations of state and political subdivisions 151 (1 ) 1,313 (28 ) 1,464 (29 ) Other investments – – 1 – 1 – Total available-for-sale $ 23,194 $ (204 ) $ 31,073 $ (684 ) $ 54,267 $ (888 )

Loans and Allowance for Credi35

Loans and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2017
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) 2017 2016 Commercial Commercial $ 91,958 $ 87,928 Lease financing 5,603 5,458 Total commercial 97,561 93,386 Commercial Real Estate Commercial mortgages 29,367 31,592 Construction and development 11,096 11,506 Total commercial real estate 40,463 43,098 Residential Mortgages Residential mortgages 46,685 43,632 Home equity loans, first liens 13,098 13,642 Total residential mortgages 59,783 57,274 Credit Card 22,180 21,749 Other Retail Retail leasing 7,988 6,316 Home equity and second mortgages 16,327 16,369 Revolving credit 3,183 3,282 Installment 8,989 8,087 Automobile 18,934 17,571 Student 1,903 2,239 Total other retail 57,324 53,864 Total loans, excluding covered loans 277,311 269,371 Covered Loans 3,121 3,836 Total loans $ 280,432 $ 273,207
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) 2017 2016 2015 Balance at beginning of period $ 698 $ 957 $ 1,309 Accretion (386 ) (392 ) (382 ) Disposals (83 ) (110 ) (132 ) Reclassifications from nonaccretable difference (a) 129 244 163 Other (8 ) (1 ) (1 ) Balance at end of period $ 350 $ 698 $ 957 (a) Primarily relates to changes in expected credit performance.
Activity in Allowance for Credit Losses by Portfolio Class	Activity in the allowance for credit losses by portfolio class was as follows: (Dollars in Millions) Commercial Commercial Real Estate Residential Mortgages Credit Card Other Retail Total Loans, Excluding Covered Loans Covered Loans Total Loans Balance at December 31, 2016 $ 1,450 $ 812 $ 510 $ 934 $ 617 $ 4,323 $ 34 $ 4,357 Add Provision for credit losses 186 19 (24 ) 908 304 1,393 (3 ) 1,390 Deduct Loans charged-off 414 30 65 887 355 1,751 – 1,751 Less recoveries of loans charged-off (150 ) (30 ) (28 ) (101 ) (112 ) (421 ) – (421 ) Net loans charged-off 264 – 37 786 243 1,330 – 1,330 Other changes (a) – – – – – – – – Balance at December 31, 2017 $ 1,372 $ 831 $ 449 $ 1,056 $ 678 $ 4,386 $ 31 $ 4,417 Balance at December 31, 2015 $ 1,287 $ 724 $ 631 $ 883 $ 743 $ 4,268 $ 38 $ 4,306 Add Provision for credit losses 488 75 (61 ) 728 95 1,325 (1 ) 1,324 Deduct Loans charged-off 417 22 85 759 332 1,615 – 1,615 Less recoveries of loans charged-off (92 ) (35 ) (25 ) (83 ) (111 ) (346 ) – (346 ) Net loans charged-off 325 (13 ) 60 676 221 1,269 – 1,269 Other changes (a) – – – (1 ) – (1 ) (3 ) (4 ) Balance at December 31, 2016 $ 1,450 $ 812 $ 510 $ 934 $ 617 $ 4,323 $ 34 $ 4,357 Balance at December 31, 2014 $ 1,146 $ 726 $ 787 $ 880 $ 771 $ 4,310 $ 65 $ 4,375 Add Provision for credit losses 361 (30 ) (47 ) 654 193 1,131 1 1,132 Deduct Loans charged-off 314 22 135 726 319 1,516 – 1,516 Less recoveries of loans charged-off (95 ) (50 ) (26 ) (75 ) (98 ) (344 ) – (344 ) Net loans charged-off 219 (28 ) 109 651 221 1,172 – 1,172 Other changes (a) (1 ) – – – – (1 ) (28 ) (29 ) Balance at December 31, 2015 $ 1,287 $ 724 $ 631 $ 883 $ 743 $ 4,268 $ 38 $ 4,306 (a) Includes net changes in credit losses to be reimbursed by the FDIC and reductions in the allowance for covered loans where the reversal of a previously recorded allowance was offset by an associated decrease in the indemnification asset, and the impact of any loan sales.
Additional Detail of Allowance for Credit Losses and Related Loan Balances by Portfolio Class	Additional detail of the allowance for credit losses by portfolio class was as follows: (Dollars in Millions) Commercial Commercial Real Estate Residential Mortgages Credit Card Other Retail Total Loans, Excluding Covered Loans Covered Loans Total Loans Allowance Balance at December 31, 2017 Related to Loans individually evaluated for impairment (a) $ 23 $ 4 $ – $ – $ – $ 27 $ – $ 27 TDRs collectively evaluated for impairment 14 4 139 60 19 236 1 237 Other loans collectively evaluated for impairment 1,335 818 310 996 659 4,118 – 4,118 Loans acquired with deteriorated credit quality – 5 – – – 5 30 35 Total allowance for credit losses $ 1,372 $ 831 $ 449 $ 1,056 $ 678 $ 4,386 $ 31 $ 4,417 Allowance Balance at December 31, 2016 Related to Loans individually evaluated for impairment (a) $ 50 $ 4 $ – $ – $ – $ 54 $ – $ 54 TDRs collectively evaluated for impairment 12 4 180 65 20 281 1 282 Other loans collectively evaluated for impairment 1,388 798 330 869 597 3,982 – 3,982 Loans acquired with deteriorated credit quality – 6 – – – 6 33 39 Total allowance for credit losses $ 1,450 $ 812 $ 510 $ 934 $ 617 $ 4,323 $ 34 $ 4,357 (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 Real Estate Residential Mortgages Credit Card Other Retail Total Loans, Excluding Covered (b) Total Loans December 31, 2017 Loans individually evaluated for impairment (a) $ 337 $ 71 $ – $ – $ – $ 408 $ – $ 408 TDRs collectively evaluated for impairment 148 145 3,524 230 186 4,233 36 4,269 Other loans collectively evaluated for impairment 97,076 40,174 56,258 21,950 57,138 272,596 1,073 273,669 Loans acquired with deteriorated credit quality – 73 1 – – 74 2,012 2,086 Total loans $ 97,561 $ 40,463 $ 59,783 $ 22,180 $ 57,324 $ 277,311 $ 3,121 $ 280,432 December 31, 2016 Loans individually evaluated for impairment (a) $ 623 $ 70 $ – $ – $ – $ 693 $ – $ 693 TDRs collectively evaluated for impairment 145 146 3,678 222 173 4,364 35 4,399 Other loans collectively evaluated for impairment 92,611 42,751 53,595 21,527 53,691 264,175 1,553 265,728 Loans acquired with deteriorated credit quality 7 131 1 – – 139 2,248 2,387 Total loans $ 93,386 $ 43,098 $ 57,274 $ 21,749 $ 53,864 $ 269,371 $ 3,836 $ 273,207 (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 Class, 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 Past Due 90 Days or More Past Due Nonperforming Total December 31, 2017 Commercial $ 97,005 $ 250 $ 57 $ 249 $ 97,561 Commercial real estate 40,279 36 6 142 40,463 Residential mortgages (a) 59,013 198 130 442 59,783 Credit card 21,593 302 284 1 22,180 Other retail 56,685 376 95 168 57,324 Total loans, excluding covered loans 274,575 1,162 572 1,002 277,311 Covered loans 2,917 50 148 6 3,121 Total loans $ 277,492 $ 1,212 $ 720 $ 1,008 $ 280,432 December 31, 2016 Commercial $ 92,588 $ 263 $ 52 $ 483 $ 93,386 Commercial real estate 42,922 44 8 124 43,098 Residential mortgages (a) 56,372 151 156 595 57,274 Credit card 21,209 284 253 3 21,749 Other retail 53,340 284 83 157 53,864 Total loans, excluding covered loans 266,431 1,026 552 1,362 269,371 Covered loans 3,563 55 212 6 3,836 Total loans $ 269,994 $ 1,081 $ 764 $ 1,368 $ 273,207 (a) At December 31, 2017, $385 million of loans 30–89 days past due and $1.9 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 United States Department of Veterans Affairs, were classified as current, compared with $273 million and $2.5 billion at December 31, 2016, respectively.
Summary of Loans by Portfolio Class 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 Mention Classified (a) Total Criticized Total December 31, 2017 Commercial $ 95,297 $ 1,130 $ 1,134 $ 2,264 $ 97,561 Commercial real estate 39,162 648 653 1,301 40,463 Residential mortgages (b) 59,141 16 626 642 59,783 Credit card 21,895 – 285 285 22,180 Other retail 57,009 6 309 315 57,324 Total loans, excluding covered loans 272,504 1,800 3,007 4,807 277,311 Covered loans 3,072 – 49 49 3,121 Total loans $ 275,576 $ 1,800 $ 3,056 $ 4,856 $ 280,432 Total outstanding commitments $ 584,072 $ 3,142 $ 3,987 $ 7,129 $ 591,201 December 31, 2016 Commercial $ 89,739 $ 1,721 $ 1,926 $ 3,647 $ 93,386 Commercial real estate 41,634 663 801 1,464 43,098 Residential mortgages (b) 56,457 10 807 817 57,274 Credit card 21,493 – 256 256 21,749 Other retail 53,576 6 282 288 53,864 Total loans, excluding covered loans 262,899 2,400 4,072 6,472 269,371 Covered loans 3,766 – 70 70 3,836 Total loans $ 266,665 $ 2,400 $ 4,142 $ 6,542 $ 273,207 Total outstanding commitments $ 562,704 $ 4,920 $ 5,629 $ 10,549 $ 573,253 (a) Classified rating on consumer loans primarily based on delinquency status. (b) At December 31, 2017, $1.9 billion of GNMA loans 90 days or more past due and $1.7 billion of restructured GNMA loans whose repayments are insured by the Federal Housing Administration or guaranteed by the United States Department of Veterans Affairs were classified with a pass rating, compared with $2.5 billion and $1.6 billion at December 31, 2016, respectively.
Summary of Impaired Loans, which Include Nonaccrual and TDR 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 Recorded Investment (a) Unpaid Principal Balance Valuation Allowance Commitments to Lend Additional Funds December 31, 2017 Commercial $ 550 $ 915 $ 44 $ 199 Commercial real estate 280 596 11 – Residential mortgages 1,946 2,339 116 1 Credit card 230 230 60 – Other retail 302 400 22 4 Total loans, excluding GNMA and covered loans 3,308 4,480 253 204 Loans purchased from GNMA mortgage pools 1,681 1,681 25 – Covered loans 38 44 1 – Total $ 5,027 $ 6,205 $ 279 $ 204 December 31, 2016 Commercial $ 849 $ 1,364 $ 68 $ 284 Commercial real estate 293 697 10 – Residential mortgages 2,274 2,847 153 – Credit card 222 222 64 – Other retail 281 456 22 4 Total loans, excluding GNMA and covered loans 3,919 5,586 317 288 Loans purchased from GNMA mortgage pools 1,574 1,574 28 – Covered loans 36 42 1 1 Total $ 5,529 $ 7,202 $ 346 $ 289 (a) Substantially all loans classified as impaired at December 31, 2017 and 2016, had an associated allowance for credit losses. The total amount of interest income recognized during 2017 on loans classified as impaired at December 31, 2017, excluding those acquired with deteriorated credit quality, was $204 million, compared to what would have been recognized at the original contractual terms of the loans of $265 million.
Impaired Loans Average Recorded Investment and Interest Income Recognized	Additional information on impaired loans for the years ended December 31 follows: (Dollars in Millions) Average Recorded Investment Interest Income Recognized 2017 Commercial $ 683 $ 7 Commercial real estate 273 11 Residential mortgages 2,135 103 Credit card 229 3 Other retail 287 14 Total loans, excluding GNMA and covered loans 3,607 138 Loans purchased from GNMA mortgage pools 1,672 65 Covered loans 37 1 Total $ 5,316 $ 204 2016 Commercial $ 799 $ 9 Commercial real estate 324 15 Residential mortgages 2,422 124 Credit card 214 4 Other retail 293 13 Total loans, excluding GNMA and covered loans 4,052 165 Loans purchased from GNMA mortgage pools 1,620 71 Covered loans 38 1 Total $ 5,710 $ 237 2015 Commercial $ 383 $ 13 Commercial real estate 433 16 Residential mortgages 2,666 131 Credit card 221 4 Other retail 336 14 Total loans, excluding GNMA and covered loans 4,039 178 Loans purchased from GNMA mortgage pools 2,079 95 Covered loans 42 1 Total $ 6,160 $ 274
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 of Loans Pre-Modification Outstanding Loan Balance Post-Modification Outstanding Loan Balance 2017 Commercial 2,758 $ 380 $ 328 Commercial real estate 128 82 78 Residential mortgages 800 90 88 Credit card 33,615 161 162 Other retail 3,881 79 68 Total loans, excluding GNMA and covered loans 41,182 792 724 Loans purchased from GNMA mortgage pools 6,791 881 867 Covered loans 11 2 2 Total loans 47,984 $ 1,675 $ 1,593 2016 Commercial 2,352 $ 844 $ 699 Commercial real estate 102 259 256 Residential mortgages 1,576 168 178 Credit card 31,394 151 153 Other retail 2,235 41 40 Total loans, excluding GNMA and covered loans 37,659 1,463 1,326 Loans purchased from GNMA mortgage pools 11,260 1,274 1,267 Covered loans 39 6 7 Total loans 48,958 $ 2,743 $ 2,600 2015 Commercial 1,607 $ 385 $ 396 Commercial real estate 108 78 76 Residential mortgages 2,080 260 258 Credit card 26,772 133 134 Other retail 2,530 54 54 Total loans, excluding GNMA and covered loans 33,097 910 918 Loans purchased from GNMA mortgage pools 8,199 864 862 Covered loans 16 5 5 Total loans 41,312 $ 1,779 $ 1,785
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 (Dollars in Millions) Number Amount 2017 Commercial 724 $ 53 Commercial real estate 36 9 Residential mortgages 374 41 Credit card 8,372 36 Other retail 415 5 Total loans, excluding GNMA and covered loans 9,921 144 Loans purchased from GNMA mortgage pools 1,369 177 Covered loans 4 – Total loans 11,294 $ 321 2016 Commercial 531 $ 24 Commercial real estate 27 12 Residential mortgages 132 17 Credit card 6,827 30 Other retail 434 9 Total loans, excluding GNMA and covered loans 7,951 92 Loans purchased from GNMA mortgage pools 202 25 Covered loans 4 1 Total loans 8,157 $ 118 2015 Commercial 494 $ 21 Commercial real estate 18 8 Residential mortgages 273 36 Credit card 6,286 29 Other retail 636 12 Total loans, excluding GNMA and covered loans 7,707 106 Loans purchased from GNMA mortgage pools 598 75 Covered loans 5 1 Total loans 8,310 $ 182
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: 2017 2016 (Dollars in Millions) Purchased Impaired Loans Purchased Nonimpaired Loans Other Total Purchased Impaired Loans Purchased Nonimpaired Loans Other Total Residential mortgage loans $ 2,012 $ 400 $ – $ 2,412 $ 2,248 $ 506 $ – $ 2,754 Other retail loans – 151 – 151 – 278 – 278 Losses reimbursable by the FDIC (a) – – 320 320 – – 381 381 Unamortized changes in FDIC asset (b) – – 238 238 – – 423 423 Covered loans 2,012 551 558 3,121 2,248 784 804 3,836 Foreclosed real estate – – 21 21 – – 26 26 Total covered assets $ 2,012 $ 551 $ 579 $ 3,142 $ 2,248 $ 784 $ 830 $ 3,862 (a) Relates to loss sharing agreements with remaining terms up through the fourth quarter of 2019. (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 2017 2016 At December 31 (Dollars in Millions) Loans Percent Loans Percent Industry Group Manufacturing $ 14,710 15.1 % $ 13,779 14.8 % Real estate, rental and leasing 12,461 12.8 10,553 11.3 Retail trade 8,952 9.2 7,573 8.1 Finance and insurance 8,639 8.8 8,728 9.3 Wholesale trade 7,383 7.6 7,552 8.1 Healthcare and social assistance 6,517 6.7 6,345 6.8 Public administration 5,116 5.2 4,546 4.9 Arts, entertainment and recreation 3,853 3.9 3,340 3.6 Professional, scientific and technical services 3,499 3.6 3,744 4.0 Educational services 3,414 3.5 3,167 3.4 Information 3,403 3.5 3,597 3.8 Transport and storage 3,198 3.3 3,561 3.8 Utilities 1,933 2.0 1,747 1.9 Other services 1,698 1.7 1,625 1.7 Mining 1,590 1.6 1,645 1.8 Agriculture, forestry, fishing and hunting 1,429 1.5 1,449 1.5 Other 9,766 10.0 10,435 11.2 Total $ 97,561 100.0 % $ 93,386 100.0 % Geography California $ 14,086 14.4 % $ 12,677 13.6 % Colorado 3,979 4.1 4,362 4.7 Illinois 5,245 5.4 4,636 5.0 Minnesota 7,406 7.6 7,093 7.6 Missouri 3,525 3.6 3,536 3.8 Ohio 4,330 4.5 4,270 4.6 Oregon 2,044 2.1 2,090 2.2 Washington 3,699 3.8 3,447 3.7 Wisconsin 3,539 3.6 3,512 3.8 Iowa, Kansas, Nebraska, North Dakota, South Dakota 4,806 4.9 4,900 5.2 Arkansas, Indiana, Kentucky, Tennessee 5,206 5.3 5,168 5.5 Idaho, Montana, Wyoming 1,225 1.3 1,251 1.3 Arizona, Nevada, New Mexico, Utah 3,836 3.9 3,487 3.7 Total banking region 62,926 64.5 60,429 64.7 Florida, Michigan, New York, Pennsylvania, Texas 16,408 16.8 15,467 16.6 All other states 18,227 18.7 17,490 18.7 Total outside Company’s banking region 34,635 35.5 32,957 35.3 Total $ 97,561 100.0 % $ 93,386 100.0 %
Commercial Real Estate Loans by Property Type and Geography Excluding Covered Loans	TABLE 8 Commercial Real Estate Loans by Property Type and Geography 2017 2016 At December 31 (Dollars in Millions) Loans Percent Loans Percent Property Type Business owner occupied $ 10,205 25.2 % $ 10,899 25.3 % Commercial property Industrial 1,580 3.9 1,631 3.8 Office 5,023 12.4 5,536 12.8 Retail 4,502 11.1 4,997 11.6 Other commercial 3,757 9.3 4,064 9.4 Multi-family 8,922 22.0 9,607 22.3 Hotel/motel 3,719 9.2 3,791 8.8 Residential homebuilders 2,489 6.2 2,311 5.4 Healthcare facilities 266 .7 262 .6 Total $ 40,463 100.0 % $ 43,098 100.0 % Geography California $ 9,558 23.6 % $ 10,734 24.9 % Colorado 1,764 4.4 1,819 4.2 Illinois 1,605 4.0 1,678 3.9 Minnesota 2,031 5.0 2,177 5.0 Missouri 1,359 3.3 1,372 3.2 Ohio 1,445 3.6 1,462 3.4 Oregon 1,847 4.6 2,094 4.9 Washington 3,499 8.6 3,435 8.0 Wisconsin 2,036 5.0 2,161 5.0 Iowa, Kansas, Nebraska, North Dakota, South Dakota 2,210 5.5 2,312 5.4 Arkansas, Indiana, Kentucky, Tennessee 1,889 4.7 1,810 4.2 Idaho, Montana, Wyoming 1,163 2.9 1,271 2.9 Arizona, Nevada, New Mexico, Utah 3,134 7.7 3,257 7.6 Total banking region 33,540 82.9 35,582 82.6 Florida, Michigan, New York, Pennsylvania, Texas 3,688 9.1 3,829 8.9 All other states 3,235 8.0 3,687 8.5 Total outside Company’s banking region 6,923 17.1 7,516 17.4 Total $ 40,463 100.0 % $ 43,098 100.0 %
Summary of Nonperforming Assets	TABLE 16 Nonperforming Assets (a) At December 31 (Dollars in Millions) 2017 2016 2015 2014 2013 Commercial Commercial $ 225 $ 443 $ 160 $ 99 $ 122 Lease financing 24 40 14 13 12 Total commercial 249 483 174 112 134 Commercial Real Estate Commercial mortgages 108 87 92 175 182 Construction and development 34 37 35 84 121 Total commercial real estate 142 124 127 259 303 Residential Mortgages (b) 442 595 712 864 770 Credit Card 1 3 9 30 78 Other Retail Retail leasing 8 2 3 1 1 Home equity and second mortgages 126 128 136 170 167 Other 34 27 23 16 23 Total other retail 168 157 162 187 191 Total nonperforming loans, excluding covered loans 1,002 1,362 1,184 1,452 1,476 Covered Loans 6 6 8 14 127 Total nonperforming loans 1,008 1,368 1,192 1,466 1,603 Other Real Estate (c)(d) 141 186 280 288 327 Covered Other Real Estate (d) 21 26 32 37 97 Other Assets 30 23 19 17 10 Total nonperforming assets $ 1,200 $ 1,603 $ 1,523 $ 1,808 $ 2,037 Total nonperforming assets, excluding covered assets $ 1,173 $ 1,571 $ 1,483 $ 1,757 $ 1,813 Excluding covered assets Accruing loans 90 days or more past due (b) $ 572 $ 552 $ 541 $ 550 $ 713 Nonperforming loans to total loans .36 % .51 % .46 % .60 % .65 % Nonperforming assets to total loans plus other real estate (c) .42 % .58 % .58 % .72 % .80 % Including covered assets Accruing loans 90 days or more past due (b) $ 720 $ 764 $ 831 $ 945 $ 1,189 Nonperforming loans to total loans .36 % .50 % .46 % .59 % .68 % Nonperforming assets to total loans plus other real estate (c) .43 % .59 % .58 % .73 % .86 % Changes in Nonperforming Assets (Dollars in Millions) Commercial and Residential Covered Total Balance December 31, 2016 $ 623 $ 948 $ 32 $ 1,603 Additions to nonperforming assets New nonaccrual loans and foreclosed properties 559 392 22 973 Advances on loans 28 1 – 29 Total additions 587 393 22 1,002 Reductions in nonperforming assets Paydowns, payoffs (415 ) (210 ) (8 ) (633 ) Net sales (50 ) (172 ) (19 ) (241 ) Return to performing status (43 ) (142 ) – (185 ) Charge-offs (e) (298 ) (48 ) – (346 ) Total reductions (806 ) (572 ) (27 ) (1,405 ) Net additions to (reductions in) nonperforming assets (219 ) (179 ) (5 ) (403 ) Balance December 31, 2017 $ 404 $ 769 $ 27 $ 1,200 (a) Throughout this document, nonperforming assets and related ratios do not include accruing loans 90 days or more past due. (b) Excludes $1.9 billion, $2.5 billion, $2.9 billion, $3.1 billion and $3.7 billion at December 31, 2017, 2016, 2015, 2014 and 2013, 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 United States Department of Veterans Affairs. (c) Foreclosed GNMA loans of $267 million, $373 million, $535 million, $641 million and $527 million at December 31, 2017, 2016, 2015, 2014 and 2013, 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 United States 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

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2017
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) 2017 2016 Aggregate future minimum lease payments to be received $ 12,709 $ 11,257 Unguaranteed residual values accruing to the lessor’s benefit 1,731 1,175 Unearned income (1,205 ) (1,023 ) Initial direct costs 274 237 Total net investment in sales-type and direct financing leases (a) $ 13,509 $ 11,646 (a) The accumulated allowance for uncollectible minimum lease payments was $94 million and $83 million at December 31, 2017 and 2016, 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, 2017: (Dollars in Millions) 2018 $ 3,709 2019 3,643 2020 3,239 2021 1,180 2022 410 Thereafter 528

Accounting for Transfers and 37

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2017
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 At December 31 (Dollars in Millions) 2017 2016 Investment carrying amount $ 5,660 $ 5,009 Unfunded capital and other commitments 2,770 2,477 Maximum exposure to loss 12,120 10,373

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and equipment at December 31 consisted of the following: (Dollars in Millions) 2017 2016 Land $ 520 $ 516 Buildings and improvements 3,425 3,383 Furniture, fixtures and equipment 2,951 2,798 Capitalized building and equipment leases 130 125 Construction in progress 35 29 7,061 6,851 Less accumulated depreciation and amortization (4,629 ) (4,408 ) Total $ 2,432 $ 2,443

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2017
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) 2017 2016 2015 Balance at beginning of period $ 2,591 $ 2,512 $ 2,338 Rights purchased 13 43 29 Rights capitalized 445 524 632 Changes in fair value of MSRs Due to fluctuations in market interest rates (a) (23 ) (55 ) (58 ) Due to revised assumptions or models (b) 18 19 10 Other changes in fair value (c) (399 ) (452 ) (439 ) Balance at end of period $ 2,645 $ 2,591 $ 2,512 (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 option adjusted spread, as well as the impact of any model changes. (c) Primarily represents changes due to realization of expected cash flows over time (decay).
Sensitivity to Changes in Interest Rates of the Fair Value of MSRs Portfolio and Related Derivative Instruments	The estimated sensitivity to changes in interest rates of the fair value of the MSRs portfolio and the related derivative instruments as of December 31 follows: 2017 2016 (Dollars in Millions) Down Down Down Up Up 50 bps Up Down Down Down Up Up 50 bps Up MSR portfolio $ (520 ) $ (231 ) $ (109 ) $ 95 $ 177 $ 302 $ (476 ) $ (209 ) $ (98 ) $ 85 $ 159 $ 270 Derivative instrument hedges 453 216 105 (96 ) (184 ) (336 ) 375 180 88 (84 ) (165 ) (314 ) Net sensitivity $ (67 ) $ (15 ) $ (4 ) $ (1 ) $ (7 ) $ (34 ) $ (101 ) $ (29 ) $ (10 ) $ 1 $ (6 ) $ (44 )
MSRs and Related Characteristics by Portfolio	A summary of the Company’s MSRs and related characteristics by portfolio as of December 31 follows: 2017 2016 (Dollars in Millions) HFA Government Conventional (c) Total HFA Government Conventional (c) Total Servicing portfolio (a) $ 40,737 $ 36,756 $ 155,353 $ 232,846 $ 34,746 $ 37,530 $ 157,771 $ 230,047 Fair value $ 450 $ 428 $ 1,767 $ 2,645 $ 398 $ 422 $ 1,771 $ 2,591 Value (bps) (b) 110 116 114 114 115 112 112 113 Weighted-average servicing fees (bps) 35 34 27 29 36 34 27 30 Multiple (value/servicing fees) 3.17 3.38 4.24 3.86 3.19 3.29 4.15 3.77 Weighted-average note rate 4.43 % 3.92 % 4.02 % 4.08 % 4.37 % 3.95 % 4.02 % 4.06 % Weighted-average age (in years) 3.0 4.3 4.2 4.0 2.9 3.8 3.8 3.7 Weighted-average expected prepayment (constant prepayment rate) 9.8 % 11.6 % 9.7 % 10.0 % 9.4 % 11.3 % 9.8 % 10.0 % Weighted-average expected life (in years) 7.7 6.5 6.9 7.0 8.0 6.8 6.9 7.0 Weighted-average option adjusted spread (d) 9.9 % 9.2 % 7.2 % 8.0 % 9.9 % 9.2 % 7.2 % 8.0 % (a) Represents principal balance of mortgages having corresponding MSR asset. (b) Calculated as fair value divided by the servicing portfolio. (c) Represents loans sold primarily to GSEs. (d) Option adjusted spread is the incremental spread added to the risk-free rate to reflect optionality and other risk inherent in the MSRs.

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible assets consisted of the following: At December 31 (Dollars in Millions) Estimated Life (a) Amortization Method (b) Balance 2017 2016 Goodwill (c) $ 9,434 $ 9,344 Merchant processing contracts 7 years/8 years SL/AC 89 108 Core deposit benefits 22 years/5 years SL/AC 131 161 Mortgage servicing rights (c) 2,645 2,591 Trust relationships 10 years/7 years SL/AC 45 59 Other identified intangibles 6 years/4 years SL/AC 318 384 Total $ 12,662 $ 12,647 (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 = straight line method AC = accelerated 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) 2017 2016 2015 Merchant processing contracts $ 24 $ 28 $ 35 Core deposit benefits 30 34 40 Trust relationships 14 16 21 Other identified intangibles 107 101 78 Total $ 175 $ 179 $ 174
Estimated Amortization Expense	The estimated amortization expense for the next five years is as follows: (Dollars in Millions) 2018 $ 148 2019 119 2020 93 2021 71 2022 51
Changes in Carrying Value of Goodwill	The following table reflects the changes in the carrying value of goodwill for the years ended December 31, 2017, 2016 and 2015: (Dollars in Millions) Corporate and Consumer and Wealth Management and Payment Treasury and Consolidated Balance at December 31, 2014 $ 1,648 $ 3,680 $ 1,570 $ 2,491 $ – $ 9,389 Foreign exchange translation and other (1 ) 1 (3 ) (25 ) – (28 ) Balance at December 31, 2015 $ 1,647 $ 3,681 $ 1,567 $ 2,466 $ – $ 9,361 Foreign exchange translation and other – – (1 ) (16 ) – (17 ) Balance at December 31, 2016 $ 1,647 $ 3,681 $ 1,566 $ 2,450 $ – $ 9,344 Goodwill acquired – – – 62 – 62 Foreign exchange translation and other – – 3 25 – 28 Balance at December 31, 2017 $ 1,647 $ 3,681 $ 1,569 $ 2,537 $ – $ 9,434

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Composition of Deposits	The composition of deposits at December 31 was as follows: (Dollars in Millions) 2017 2016 Noninterest-bearing deposits $ 87,557 $ 86,097 Interest-bearing deposits Interest checking 74,520 66,298 Money market savings 107,973 109,947 Savings accounts 43,809 41,783 Time deposits 33,356 30,465 Total interest-bearing deposits 259,658 248,493 Total deposits $ 347,215 $ 334,590
Maturities of Time Deposits Outstanding	The maturities of time deposits outstanding at December 31, 2017 were as follows: (Dollars in Millions) 2018 $ 27,158 2019 2,712 2020 1,570 2021 1,226 2022 685 Thereafter 5 Total $ 33,356

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Summary of Short-Term Borrowings	The following table is a summary of short-term borrowings for the last three years: 2017 2016 2015 (Dollars in Millions) Amount Rate Amount Rate Amount Rate At year-end Federal funds purchased $ 252 .77 % $ 447 .30 % $ 647 .23 % Securities sold under agreements to repurchase 803 .61 801 .12 1,092 .02 Commercial paper 8,303 .68 10,010 .30 22,022 .21 Other short-term borrowings 7,293 2.13 2,705 1.00 4,116 .69 Total $ 16,651 1.31 % $ 13,963 .43 % $ 27,877 .27 % Average for the year Federal funds purchased (b) $ 528 34.57 % $ 1,015 17.17 % $ 1,169 15.05 % Securities sold under agreements to repurchase 917 .44 891 .18 973 .10 Commercial paper 8,236 .49 14,827 .26 21,892 .12 Other short-term borrowings 5,341 1.90 3,173 1.67 3,926 1.13 Total (b) $ 15,022 2.18 % $ 19,906 1.34 % $ 27,960 .89 % Maximum month-end Federal funds purchased $ 600 $ 2,487 $ 1,868 Securities sold under agreements to repurchase 927 1,177 1,124 Commercial paper 9,950 21,441 23,101 Other short-term borrowings 7,293 6,771 7,656 (a) Interest and rates are presented on a fully taxable-equivalent basis utilizing a tax rate of 35 percent for the periods presented. (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 2017, 2016 and 2015 was $178 million, $171 million and $175 million, respectively.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2017
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 2017 2016 U.S. Bancorp (Parent Company) Subordinated notes Fixed 2.950 % 2022 $ 1,300 $ 1,300 Fixed 3.600 % 2024 1,000 1,000 Fixed 7.500 % 2026 199 199 Fixed 3.100 % 2026 1,000 1,000 Medium-term notes Fixed .850% - 4.125 % 2018 - 2027 11,299 8,800 Floating 1.767% - 2.005 % 2018 - 2022 1,000 750 Other (b) (29 ) (4 ) Subtotal 15,769 13,045 Subsidiaries Federal Home Loan Bank advances Fixed 1.250% - 8.250 % 2018 - 2026 208 10 Floating 1.557% - 1.973 % 2018 - 2026 5,272 8,559 Bank notes Fixed 1.400% - 2.800 % 2019 - 2025 6,200 6,800 Floating 1.063% - 1.858 % 2019 - 2057 3,810 3,898 Other (c) 1,000 1,011 Subtotal 16,490 20,278 Total $ 32,259 $ 33,323 (a) Weighted-average interest rates of medium-term notes, Federal Home Loan Bank advances and bank notes were 2.51 percent, 1.83 percent and 1.86 percent, respectively. (b) Includes debt issuance fees and unrealized gains and losses and deferred amounts relating to derivative instruments. (c) Includes consolidated community development and tax-advantaged
Maturities of Long-term Debt Outstanding	Maturities of long-term debt outstanding at December 31, 2017, were: (Dollars in Millions) Parent Consolidated 2018 $ 1,499 $ 2,572 2019 1,497 8,001 2020 – 3,047 2021 2,196 2,215 2022 3,790 4,074 Thereafter 6,787 12,350 Total $ 15,769 $ 32,259

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Regulatory Capital Ratios	TABLE 23 Regulatory Capital Ratios U.S. Bancorp U.S. Bank National Association At December 31 (Dollars in Millions) 2017 2016 2017 2016 Basel III transitional standardized approach: Common equity tier 1 capital $ 34,369 $ 33,720 $ 37,586 $ 36,914 Tier 1 capital 39,806 39,421 37,701 37,114 Total risk-based capital 47,503 47,355 45,466 44,853 Risk-weighted assets 367,771 358,237 361,973 352,023 Common equity tier 1 capital as a percent of risk-weighted assets 9.3 % 9.4 % 10.4 % 10.5 % Tier 1 capital as a percent of risk-weighted assets 10.8 11.0 10.4 10.5 Total risk-based capital as a percent of risk-weighted assets 12.9 13.2 12.6 12.7 Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio) 8.9 9.0 8.6 8.6 Basel III transitional advanced approaches: Common equity tier 1 capital $ 34,369 $ 33,720 $ 37,586 $ 36,914 Tier 1 capital 39,806 39,421 37,701 37,114 Total risk-based capital 44,477 44,264 42,414 41,737 Risk-weighted assets 287,211 277,141 281,659 271,920 Common equity tier 1 capital as a percent of risk-weighted assets 12.0 % 12.2 % 13.3 % 13.6 % Tier 1 capital as a percent of risk-weighted assets 13.9 14.2 13.4 13.6 Total risk-based capital as a percent of risk-weighted assets 15.5 16.0 15.1 15.3 Bank Regulatory Capital Requirements Minimum Well- Capitalized 2017 Common equity tier 1 capital as a percent of risk-weighted assets 5.750 % 6.500 % Tier 1 capital as a percent of risk-weighted assets 7.250 8.000 Total risk-based capital as a percent of risk-weighted assets 9.250 10.000 Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio) 4.000 5.000 2016 Common equity tier 1 capital as a percent of risk-weighted assets 5.125 % 6.500 % Tier 1 capital as a percent of risk-weighted assets 6.625 8.000 Total risk-based capital as a percent of risk-weighted assets 8.625 10.000 Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio) 4.000 5.000
Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock	The number of shares issued and outstanding and the carrying amount of each outstanding series of the Company’s preferred stock were as follows: 2017 2016 At December 31 (Dollars in Millions) Shares Liquidation Discount Carrying Shares Liquidation Discount Carrying 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 Series H 20,000 500 13 487 20,000 500 13 487 Series I 30,000 750 5 745 30,000 750 5 745 Series J 40,000 1,000 7 993 – – – – Total preferred stock (a) 186,510 $ 5,601 $ 182 $ 5,419 189,910 $ 5,686 $ 185 $ 5,501 (a) The par value of all shares issued and outstanding at December 31, 2017 and 2016, 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 2017 49 $ 2,622 2016 61 2,600 2015 52 2,246
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 Available-For- Sale Unrealized Gains Available-For-Sale Held-To-Maturity Unrealized Gains Unrealized Gains Foreign Currency Total 2017 Balance at beginning of period $ (431 ) $ 25 $ 55 $ (1,113 ) $ (71 ) $ (1,535 ) Changes in unrealized gains and losses 178 – (5 ) (41 ) – 132 Foreign currency translation adjustment (a) – – – – (2 ) (2 ) Reclassification to earnings of realized gains and losses (57 ) (13 ) 30 117 – 77 Applicable income taxes (47 ) 5 (9 ) (29 ) 4 (76 ) Balance at end of period $ (357 ) $ 17 $ 71 $ (1,066 ) $ (69 ) $ (1,404 ) 2016 Balance at beginning of period $ 111 $ 36 $ (67 ) $ (1,056 ) $ (43 ) $ (1,019 ) Changes in unrealized gains and losses (858 ) – 74 (255 ) – (1,039 ) Other-than-temporary impairment not recognized in earnings on securities available-for-sale (1 ) – – – – (1 ) Foreign currency translation adjustment (a) – – – – (28 ) (28 ) Reclassification to earnings of realized gains and losses (22 ) (18 ) 124 163 – 247 Applicable income taxes 339 7 (76 ) 35 – 305 Balance at end of period $ (431 ) $ 25 $ 55 $ (1,113 ) $ (71 ) $ (1,535 ) 2015 Balance at beginning of period $ 392 $ 52 $ (172 ) $ (1,106 ) $ (62 ) $ (896 ) Changes in unrealized gains and losses (457 ) – (25 ) (142 ) – (624 ) Foreign currency translation adjustment (a) – – – – 20 20 Reclassification to earnings of realized gains and losses – (25 ) 195 223 – 393 Applicable income taxes 176 9 (65 ) (31 ) (1 ) 88 Balance at end of period $ 111 $ 36 $ (67 ) $ (1,056 ) $ (43 ) $ (1,019 ) (a) Represents the impact of changes in foreign currency exchange rates on the Company’s investment in foreign operations and related hedges.
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 Net Income Affected Line Item in the (Dollars in Millions) 2017 2016 2015 Unrealized gains (losses) on securities available-for-sale Realized gains (losses) on sale of securities $ 57 $ 27 $ 1 Total securities gains (losses), net Other-than-temporary impairment recognized in earnings – (5 ) (1 ) 57 22 – Total before tax (22 ) (9 ) – Applicable income taxes 35 13 – Net-of-tax Unrealized gains (losses) on securities transferred from available-for-sale held-to-maturity Amortization of unrealized gains 13 18 25 Interest income (5 ) (7 ) (9 ) Applicable income taxes 8 11 16 Net-of-tax Unrealized gains (losses) on derivative hedges Realized gains (losses) on derivative hedges (30 ) (124 ) (195 ) Interest expense 11 48 75 Applicable income taxes (19 ) (76 ) (120 ) Net-of-tax Unrealized gains (losses) on retirement plans Actuarial gains (losses) and prior service cost (credit) amortization (117 ) (163 ) (223 ) Employee benefits expense 45 63 85 Applicable income taxes (72 ) (100 ) (138 ) Net-of-tax Total impact to net income $ (48 ) $ (152 ) $ (242 )
Components of Company's Regulatory Capital	The following table provides the components of the Company’s regulatory capital at December 31: (Dollars in Millions) 2017 2016 Basel III transitional standardized approach: Common shareholders’ equity $ 43,621 $ 41,797 Less intangible assets Goodwill (net of deferred tax liability) (8,613 ) (8,203 ) Other disallowed intangible assets (466 ) (427 ) Other (a) (173 ) 553 Total common equity tier 1 capital 34,369 33,720 Qualifying preferred stock 5,419 5,501 Noncontrolling interests eligible for tier 1 capital 117 203 Other (b) (99 ) (3 ) Total tier 1 capital 39,806 39,421 Eligible portion of allowance for credit losses 4,417 4,357 Subordinated debt and noncontrolling interests eligible for tier 2 capital 3,280 3,576 Other – 1 Total tier 2 capital 7,697 7,934 Total risk-based capital $ 47,503 $ 47,355 Risk-weighted assets $ 367,771 $ 358,237 Basel III transitional advanced approaches: Common shareholders’ equity $ 43,621 $ 41,797 Less intangible assets Goodwill (net of deferred tax liability) (8,613 ) (8,203 ) Other disallowed intangible assets (466 ) (427 ) Other (a) (173 ) 553 Total common equity tier 1 capital 34,369 33,720 Qualifying preferred stock 5,419 5,501 Noncontrolling interests eligible for tier 1 capital 117 203 Other (b) (99 ) (3 ) Total tier 1 capital 39,806 39,421 Eligible portion of allowance for credit losses 1,391 1,266 Subordinated debt and noncontrolling interests eligible for tier 2 capital 3,280 3,576 Other – 1 Total tier 2 capital 4,671 4,843 Total risk-based capital $ 44,477 $ 44,264 Risk-weighted assets $ 287,211 $ 277,141 (a) Includes the impact of items included in other comprehensive income (loss), such as unrealized gains (losses) on available-for-sale (b) Includes the remaining portion of deferred tax assets not eligible for total tier 1 capital.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Components of Earnings Per Share	The components of earnings per share were: Year Ended December 31 (Dollars and Shares in Millions, Except Per Share Data) 2017 2016 2015 Net income attributable to U.S. Bancorp $ 6,218 $ 5,888 $ 5,879 Preferred dividends (267 ) (281 ) (247 ) Impact of preferred stock redemption (a) (10 ) – – Impact of the purchase of noncontrolling interests (b) – 9 – Earnings allocated to participating stock awards (28 ) (27 ) (24 ) Net income applicable to U.S. Bancorp common shareholders $ 5,913 $ 5,589 $ 5,608 Average common shares outstanding 1,677 1,718 1,764 Net effect of the exercise and assumed purchase of stock awards 6 6 8 Average diluted common shares outstanding 1,683 1,724 1,772 Earnings per common share $ 3.53 $ 3.25 $ 3.18 Diluted earnings per common share $ 3.51 $ 3.24 $ 3.16 (a) Represents stock issuance costs originally recorded in preferred stock upon the issuance of the Company’s Series G Preferred Stock that were reclassified to retained earnings on the date the Company announced its intent to redeem the outstanding shares. (b) Represents the difference between the carrying amount and amount paid by the Company to purchase third party investor holdings of the preferred stock of USB Realty Corp, a consolidated subsidiary of the Company.

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [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 (Dollars in Millions) 2017 2016 2017 2016 Change In Projected Benefit Obligation Benefit obligation at beginning of measurement period $ 5,073 $ 4,650 $ 75 $ 93 Service cost 187 177 – – Interest cost 220 211 2 3 Participants’ contributions – – 8 10 Actuarial loss (gain) 430 234 (1 ) (14 ) Lump sum settlements (45 ) (61 ) – – Benefit payments (145 ) (138 ) (18 ) (19 ) Federal subsidy on benefits paid – – 2 2 Benefit obligation at end of measurement period (a) $ 5,720 $ 5,073 $ 68 $ 75 Change In Fair Value Of Plan Assets Fair value at beginning of measurement period $ 3,769 $ 3,355 $ 82 $ 82 Actual return on plan assets 665 230 10 2 Employer contributions 1,238 383 5 7 Participants’ contributions – – 8 10 Lump sum settlements (45 ) (61 ) – – Benefit payments (145 ) (138 ) (18 ) (19 ) Fair value at end of measurement period $ 5,482 $ 3,769 $ 87 $ 82 Funded (Unfunded) Status $ (238 ) $ (1,304 ) $ 19 $ 7 Components Of The Consolidated Balance Sheet Noncurrent benefit asset $ 270 $ – $ 19 $ 7 Current benefit liability (23 ) (22 ) – – Noncurrent benefit liability (485 ) (1,282 ) – – Recognized amount $ (238 ) $ (1,304 ) $ 19 $ 7 Accumulated Other Comprehensive Income (Loss), Pretax Net actuarial gain (loss) $ (1,822 ) $ (1,901 ) $ 68 $ 66 Net prior service credit (cost) – 2 22 25 Recognized amount $ (1,822 ) $ (1,899 ) $ 90 $ 91 (a) At December 31, 2017 and 2016, the accumulated benefit obligation for all pension plans was $5.2 billion and $4.6 billion.
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) 2017 2016 Pension Plans with Projected Benefit Obligations in Excess of Plan Assets Projected benefit obligation $ 508 $ 5,073 Fair value of plan assets – 3,769 Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets Projected benefit obligation $ 508 $ 5,073 Accumulated benefit obligation 485 4,625 Fair value of plan assets – 3,769
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) 2017 2016 2015 2017 2016 2015 Components Of Net Periodic Benefit Cost Service cost $ 187 $ 177 $ 188 $ – $ – $ – Interest cost 220 211 195 2 3 3 Expected return on plan assets (284 ) (266 ) (223 ) (3 ) (1 ) (1 ) Prior service cost (credit) and transition obligation (asset) amortization (2 ) (5 ) (4 ) (3 ) (3 ) (3 ) Actuarial loss (gain) amortization 127 175 234 (5 ) (4 ) (4 ) Net periodic benefit cost $ 248 $ 292 $ 390 $ (9 ) $ (5 ) $ (5 ) Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income (Loss) Net actuarial gain (loss) arising during the year $ (48 ) $ (270 ) $ (146 ) $ 7 $ 15 $ 4 Net actuarial loss (gain) amortized during the year 127 175 234 (5 ) (4 ) (4 ) Net prior service cost (credit) and transition obligation (asset) amortized during the year (2 ) (5 ) (4 ) (3 ) (3 ) (3 ) Total recognized in other comprehensive income (loss) $ 77 $ (100 ) $ 84 $ (1 ) $ 8 $ (3 ) Total recognized in net periodic benefit cost and other comprehensive income (loss) (a)(b) $ (171 ) $ (392 ) $ (306 ) $ 8 $ 13 $ 2 (a) The pretax estimated actuarial loss (gain) for the pension plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost in 2018 is $146 million. (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 2018 are $(6) 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 (Dollars in Millions) 2017 2016 2017 2016 Discount rate (a) 3.84 % 4.27 % 3.34 % 3.57 % Rate of compensation increase (b) 3.56 3.58 * * Health care cost trend rate for the next year (c) 6.75 % 7.00 % Effect on accumulated postretirement benefit obligation One percent increase $ 3 $ 4 One percent decrease (3 ) (4 ) (a) The discount rates were developed using a cash flow matching bond model with a modified duration for the qualified pension plan, non-qualified (b) Determined on an active liability-weighted basis. (c) The 2017 and 2016 rates are assumed to decrease gradually to 5.00 percent by 2025 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) 2017 2016 2015 2017 2016 2015 Discount rate (a) 4.27 % 4.45 % 4.13 % 3.57 % 3.59 % 3.46 % Expected return on plan assets (b) 7.25 7.50 7.50 3.50 1.50 1.50 Rate of compensation increase (c) 3.58 4.06 4.07 * * * Health care cost trend rate (d) Prior to age 65 7.00 % 6.50 % 7.00 % After age 65 7.00 6.50 7.00 Effect on 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 plan, non-qualified (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 2017 pre-65 post-65 pre-65 post-65 * Not applicable
Summary of Plan Investment Assets Measured at Fair Value	The following table summarizes plan investment assets measured at fair value at December 31: Qualified Pension Plan Postretirement 2017 2016 2017 2016 (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 1 Cash and cash equivalents $ 727 (a) $ – $ – $ 727 $ 49 $ – $ – $ 49 $ 36 $ 82 Debt securities 517 723 – 1,240 362 577 – 939 – – Corporate stock Real estate equity securities (b) 216 – – 216 169 – – 169 – – Mutual funds Debt securities – 205 – 205 – 164 – 164 – – Emerging markets equity securities – 120 – 120 – 155 – 155 – – Other – – 2 2 – – 1 1 – – $ 1,460 $ 1,048 $ 2 2,510 $ 580 $ 896 $ 1 1,477 36 82 Plan investment assets not classified in fair value hierarchy (f) Collective investment funds Domestic equity securities 1,327 977 29 – Mid-small (c) 346 303 – – International equity securities 934 725 22 – Hedge funds (d) 200 188 – – Private equity funds (e) 165 99 – – Total plan investment assets at fair value $ 5,482 $ 3,769 $ 87 $ 82 (a) Includes an employer contribution made in late 2017, which was invested consistent with the plan’s target asset allocation, subsequent to December 31, 2017. (b) At December 31, 2017 and 2016, securities included $105 million and $98 million in domestic equities, respectively, and $111 million and $71 million in international equities, respectively. (c) At December 31, 2017 and 2016, securities included $346 million and $303 million in domestic equities, respectively. (d) This category consists of several investment strategies diversified across several hedge fund managers. (e) This category consists of several investment strategies diversified across several private equity fund managers. (f) These investments are valued based on net asset value per share as a practical expedient; fair values are provided to reconcile to total investment assets of the plans at fair value.
Summarizes the Changes for Qualified Pension Plan Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3)	The following table summarizes the changes in fair value for qualified pension plan investment assets measured at fair value using significant unobservable inputs (Level 3) for the years ended December 31: 2017 2016 2015 (Dollars in Millions) Other Other Other Balance at beginning of period $ 1 $ 1 $ 2 Unrealized gains (losses) relating to assets still held at end of year – – (1 ) Purchases, sales, and settlements, net 1 – – Balance at end of period $ 2 $ 1 $ 1
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 (a) Medicare Part D 2018 $ 201 $ 10 $ 2 2019 215 9 1 2020 232 9 1 2021 250 8 1 2022 260 8 1 2023 – 2027 1,564 29 4 (a) Net of expected retiree contributions and before Medicare Part D subsidy.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
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- Average Weighted-Average Aggregate (in millions) 2017 Number outstanding at beginning of period 17,059,241 $ 29.95 Granted 1,066,188 54.97 Exercised (5,389,741 ) 29.58 Cancelled (a) (67,221 ) 43.31 Number outstanding at end of period (b) 12,668,467 $ 32.15 4.5 $ 272 Exercisable at end of period 9,647,937 $ 27.87 3.3 $ 248 2016 Number outstanding at beginning of period 25,725,708 $ 29.82 Granted 1,644,288 39.50 Exercised (10,163,668 ) 31.09 Cancelled (a) (147,087 ) 35.18 Number outstanding at end of period (b) 17,059,241 $ 29.95 4.1 $ 365 Exercisable at end of period 13,856,142 $ 27.53 3.1 $ 330 2015 Number outstanding at beginning of period 33,649,198 $ 29.31 Granted 1,122,697 44.28 Exercised (8,721,834 ) 29.59 Cancelled (a) (324,353 ) 32.93 Number outstanding at end of period (b) 25,725,708 $ 29.82 3.6 $ 331 Exercisable at end of period 22,446,095 $ 28.68 3.0 $ 314 (a) Options cancelled include both non-vested (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 2017 2016 2015 Estimated fair value $ 14.66 $ 10.28 $ 12.23 Risk-free interest rates 2.0 % 1.3 % 1.7 % Dividend yield 2.6 % 2.6 % 2.6 % Stock volatility factor .35 .36 .37 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) 2017 2016 2015 Fair value of options vested $ 13 $ 18 $ 25 Intrinsic value of options exercised 127 138 130 Cash received from options exercised 159 316 257 Tax benefit realized from options exercised 49 53 50
Stock Options Outstanding Additional Information	Additional information regarding stock options outstanding as of December 31, 2017, is as follows: Outstanding Options Exercisable Options Range of Exercise Prices Shares Weighted- Weighted- Shares Weighted- $11.02 – $20.00 1,562,979 1.2 $ 11.95 1,562,979 $ 11.95 $20.01 – $25.00 1,363,504 2.2 23.85 1,363,504 23.85 $25.01 – $30.00 3,661,570 3.4 28.21 3,661,570 28.21 $30.01 – $35.00 1,519,505 2.6 33.37 1,519,505 33.37 $35.01 – $40.00 1,534,333 8.1 39.49 355,492 39.49 $40.01 – $45.00 1,971,691 6.6 42.33 1,184,802 41.92 $50.01 – $55.01 1,054,885 9.1 54.97 85 55.01 12,668,467 4.5 $ 32.15 9,647,937 $ 27.87
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: 2017 2016 2015 Year Ended December 31 Shares Weighted- Average Grant- Date Fair Value Shares Weighted- Average Grant- Date Fair Value Shares Weighted- Average Grant- Date Fair Value Outstanding at beginning of period 8,265,507 $ 39.50 6,894,831 $ 38.44 7,921,571 $ 34.09 Granted 2,850,927 54.45 4,879,421 39.65 2,897,396 44.24 Vested (3,295,376 ) 40.66 (3,069,035 ) 37.25 (3,428,736 ) 33.27 Cancelled (374,103 ) 43.91 (439,710 ) 40.18 (495,400 ) 38.66 Outstanding at end of period 7,446,955 $ 44.49 8,265,507 $ 39.50 6,894,831 $ 38.44

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Components of Income Tax Expense	The components of income tax expense were: Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Federal Current $ 2,086 $ 2,585 $ 1,956 Deferred (1,180 ) (711 ) (223 ) Federal income tax 906 1,874 1,733 State Current 201 337 346 Deferred 157 (50 ) 18 State income tax 358 287 364 Total income tax provision $ 1,264 $ 2,161 $ 2,097
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) 2017 2016 2015 Tax at statutory rate $ 2,631 $ 2,837 $ 2,810 State income tax, at statutory rates, net of federal tax benefit 281 244 237 Tax effect of Revaluation of tax related assets and liabilities (a) (910 ) – – Tax credits and benefits, net of related expenses (774 ) (710 ) (700 ) Tax-exempt (200 ) (196 ) (201 ) Noncontrolling interests (12 ) (20 ) (19 ) Nondeductible legal and regulatory expenses 213 30 – Other items 35 (b) (24 ) (30 ) (c) Applicable income taxes $ 1,264 $ 2,161 $ 2,097 (a) In late 2017, tax reform legislation was enacted that, among other provisions, reduced the federal statutory rate for corporations from 35 percent to 21 percent effective in 2018. In accordance with generally accepted accounting principles, the Company revalued its deferred tax assets and liabilities at December 31, 2017, resulting in an estimated net tax benefit of $910 million, which the Company recorded in 2017. (b) Includes excess tax benefits associated with stock-based compensation under accounting guidance effective January 1, 2017. Previously, these benefits were recorded in capital surplus. (c) Includes the resolution of certain tax matters with taxing authorities in the first quarter of 2015.
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) 2017 2016 2015 Balance at beginning of period $ 302 $ 243 $ 267 Additions (reductions) for tax positions taken in prior years 3 57 (17 ) Additions for tax positions taken in the current year 9 12 13 Exam resolutions (23 ) (6 ) (17 ) Statute expirations (4 ) (4 ) (3 ) Balance at end of period $ 287 $ 302 $ 243
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) 2017 2016 Deferred Tax Assets Federal, state and foreign net operating loss and credit carryforwards $ 2,249 $ 971 Allowance for credit losses 1,116 1,667 Accrued expenses 468 806 Partnerships and other investment assets 252 521 Securities available-for-sale 111 220 Stock compensation 79 120 Pension and postretirement benefits – 394 Other deferred tax assets, net 215 291 Gross deferred tax assets 4,490 4,990 Deferred Tax Liabilities Leasing activities (2,277 ) (3,096 ) Goodwill and other intangible assets (693 ) (962 ) Mortgage servicing rights (604 ) (883 ) Loans (160 ) (234 ) Pension and postretirement benefits (20 ) – Fixed assets (4 ) (60 ) Other deferred tax liabilities, net (131 ) (113 ) Gross deferred tax liabilities (3,889 ) (5,348 ) Valuation allowance (128 ) (121 ) Net Deferred Tax Asset (Liability) $ 473 $ (479 )

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
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 In Years Notional Fair Weighted-Average In Years December 31, 2017 Fair value hedges Interest rate contracts Receive fixed/pay floating swaps $ 1,000 $ 28 6.70 $ 3,600 $ 16 1.55 Cash flow hedges Interest rate contracts Pay fixed/receive floating swaps 3,772 5 6.73 – – – Net investment hedges Foreign exchange forward contracts – – – 373 8 .05 Other economic hedges Interest rate contracts Futures and forwards Buy 1,632 7 .10 1,326 2 .04 Sell 15,291 10 .89 4,511 10 .03 Options Purchased 4,985 65 7.57 – – – Written 1,285 21 .10 5 – .05 Receive fixed/pay floating swaps 2,019 5 16.49 5,469 – 8.43 Pay fixed/receive floating swaps 4,844 21 7.69 46 1 6.70 Foreign exchange forward contracts 147 1 .02 669 8 .04 Equity contracts 45 – 1.10 88 1 .58 Credit contracts 1,559 – 3.41 3,779 1 3.16 Other (a) – – – 1,164 125 2.50 Total $ 36,579 $ 163 $ 21,030 $ 172 December 31, 2016 Fair value hedges Interest rate contracts Receive fixed/pay floating swaps $ 2,550 $ 49 4.28 $ 1,250 $ 12 2.32 Cash flow hedges Interest rate contracts Pay fixed/receive floating swaps 3,272 108 8.63 2,787 35 .83 Net investment hedges Foreign exchange forward contracts 1,347 15 .04 – – – Other economic hedges Interest rate contracts Futures and forwards Buy 1,748 13 .09 1,722 18 .05 Sell 2,278 129 .08 4,214 43 .09 Options Purchased 1,565 43 8.60 – – – Written 1,073 25 .07 12 1 .06 Receive fixed/pay floating swaps 6,452 26 11.48 1,561 16 6.54 Pay fixed/receive floating swaps 4,705 13 6.51 2,320 9 7.80 Foreign exchange forward contracts 849 6 .02 867 6 .02 Equity contracts 11 – .40 102 1 .57 Credit contracts 1,397 – 3.38 3,674 2 3.57 Other (a) 19 – .03 830 106 3.42 Total $ 27,266 $ 427 $ 19,339 $ 249 (a) Includes 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 $1.2 billion, $125 million and 2.50 years at December 31, 2017, respectively, compared to $811 million, $106 million and 3.50 years at December 31, 2016, respectively. In addition, includes short-term underwriting purchase and sale commitments with total asset and liability notional values of $19 million at December 31, 2016.
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 December 31, 2017 Interest rate contracts Receive fixed/pay floating swaps $ 28,681 $ 679 5.71 $ 59,990 $ 840 4.27 Pay fixed/receive floating swaps 63,038 860 4.20 25,093 602 5.76 Options Purchased 29,091 22 1.61 880 14 4.24 Written 880 15 4.24 27,056 20 1.50 Futures Sell 7,007 4 1.21 – – – Foreign exchange rate contracts Forwards, spots and swaps 24,099 656 .81 23,440 636 .83 Options Purchased 4,026 83 1.20 – – – Written – – – 4,026 83 1.20 Total $ 156,822 $ 2,319 $ 140,485 $ 2,195 December 31, 2016 Interest rate contracts Receive fixed/pay floating swaps $ 38,501 $ 930 4.07 $ 39,403 $ 632 4.89 Pay fixed/receive floating swaps 36,671 612 4.99 40,324 996 4.07 Options Purchased 14,545 51 1.85 125 2 1.37 Written 125 3 1.37 13,518 50 1.70 Futures Buy 306 – 1.96 7,111 7 .90 Foreign exchange rate contracts Forwards, spots and swaps 20,664 849 .58 19,640 825 .60 Options Purchased 2,376 98 1.67 – – – Written – – – 2,376 98 1.67 Total $ 113,188 $ 2,543 $ 122,497 $ 2,610
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) Gains (Losses) Recognized in Other Gains (Losses) Reclassified from (Dollars in Millions) 2017 2016 2015 2017 2016 2015 Asset and Liability Management Positions Cash flow hedges Interest rate contracts (a) $ (3 ) $ 46 $ (15 ) $ (19 ) $ (76 ) $ (120 ) Net investment hedges Foreign exchange forward contracts (56 ) 33 101 – – – Non-derivative (46 ) – – – – – Note: Ineffectiveness on cash flow and net investment hedges was not material for the years ended December 31, 2017, 2016 and 2015. (a) Gains (Losses) reclassified from other comprehensive income (loss) into interest expense.
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) 2017 2016 2015 Asset and Liability Management Positions Fair value hedges (a) Interest rate contracts Other noninterest income $ (28 ) $ (31 ) $ 7 Other economic hedges Interest rate contracts Futures and forwards Mortgage banking revenue 24 101 186 Purchased and written options Mortgage banking revenue 237 331 191 Receive fixed/pay floating swaps Mortgage banking revenue 255 226 139 Pay fixed/receive floating swaps Mortgage banking revenue (220 ) (140 ) (33 ) Foreign exchange forward contracts Commercial products revenue (69 ) (14 ) 108 Equity contracts Compensation expense 1 1 (1 ) Credit contracts Other noninterest income 3 1 2 Other Other noninterest income (1 ) (39 ) – Customer-Related Positions Interest rate contracts Receive fixed/pay floating swaps Other noninterest income (876 ) (708 ) 360 Pay fixed/receive floating swaps Other noninterest income 943 769 (320 ) Purchased and written options Other noninterest income (24 ) (5 ) 3 Futures Other noninterest income (3 ) (6 ) 1 Foreign exchange rate contracts Forwards, spots and swaps Commercial products revenue 92 88 74 Purchased and written options Commercial products revenue 2 (1 ) 2 (a) Gains (Losses) on items hedged by interest rate contracts included in noninterest income (expense), were $28 million, $31 million and $(7) million for the years ended December 31, 2017, 2016 and 2015, respectively. The ineffective portion was immaterial for the years ended December 31, 2017, 2016 and 2015.

Netting Arrangements for Cert50

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Summary of Maturities by Category of Collateral Pledged for Repurchase Agreements and Securities Loaned Transactions	The following table summarizes the maturities by category of collateral pledged for repurchase agreements and securities loaned transactions: (Dollars in Millions) Overnight and Less Than Total December 31, 2017 Repurchase agreements U.S. Treasury and agencies $ 25 $ – $ 25 Residential agency mortgage-backed securities 644 30 674 Corporate debt securities 104 – 104 Total repurchase agreements 773 30 803 Securities loaned Corporate debt securities 111 – 111 Total securities loaned 111 – 111 Gross amount of recognized liabilities $ 884 $ 30 $ 914 December 31, 2016 Repurchase agreements U.S. Treasury and agencies $ 60 $ – $ 60 Residential agency mortgage-backed securities 681 30 711 Corporate debt securities 30 – 30 Total repurchase agreements 771 30 801 Securities loaned Corporate debt securities 223 – 223 Total securities loaned 223 – 223 Gross amount of recognized liabilities $ 994 $ 30 $ 1,024
Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Assets 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 Recognized Gross Amounts Consolidated (a) Net Amounts Consolidated Gross Amounts Not Offset on (Dollars in Millions) Financial (b) Collateral (c) Net December 31, 2017 Derivative assets (d) $ 1,759 $ (652 ) $ 1,107 $ (110 ) $ (5 ) $ 992 Reverse repurchase agreements 24 – 24 (24 ) – – Securities borrowed 923 – 923 – (896 ) 27 Total $ 2,706 $ (652 ) $ 2,054 $ (134 ) $ (901 ) $ 1,019 December 31, 2016 Derivative assets (d) $ 2,122 $ (984 ) $ 1,138 $ (78 ) $ (10 ) $ 1,050 Reverse repurchase agreements 77 – 77 (60 ) (17 ) – Securities borrowed 944 – 944 (10 ) (909 ) 25 Total $ 3,143 $ (984 ) $ 2,159 $ (148 ) $ (936 ) $ 1,075 (a) Includes $50 million and $210 million of cash collateral related payables that were netted against derivative assets at December 31, 2017 and 2016, 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 $723 million and $848 million at December 31, 2017 and 2016, respectively, of derivative assets not subject to netting arrangements or where uncertainty exists regarding legal enforceability of the netting arrangements.
Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Liabilities But Available for Offset in Event of Default	Gross Recognized Gross Amounts Consolidated (a) Net Amounts Consolidated Gross Amounts Not Offset on (Dollars in Millions) Financial (b) Collateral (c) Net December 31, 2017 Derivative liabilities (d) $ 1,629 $ (1,130 ) $ 499 $ (110 ) $ – $ 389 Repurchase agreements 803 – 803 (24 ) (779 ) – Securities loaned 111 – 111 – (110 ) 1 Total $ 2,543 $ (1,130 ) $ 1,413 $ (134 ) $ (889 ) $ 390 December 31, 2016 Derivative liabilities (d) $ 1,951 $ (1,185 ) $ 766 $ (78 ) $ – $ 688 Repurchase agreements 801 – 801 (60 ) (741 ) – Securities loaned 223 – 223 (10 ) (211 ) 2 Total $ 2,975 $ (1,185 ) $ 1,790 $ (148 ) $ (952 ) $ 690 (a) Includes $528 million and $411 million of cash collateral related receivables that were netted against derivative liabilities at December 31, 2017 and 2016, 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 $738 million and $908 million at December 31, 2017 and 2016, respectively, of derivative liabilities not subject to netting arrangements or where uncertainty exists regarding legal enforceability of the netting arrangements.

Fair Values of Assets and Lia51

Fair Values of Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Valuation Assumption Ranges for MSRs	The following table shows the significant valuation assumption ranges for MSRs at December 31, 2017: Minimum Maximum Average Expected prepayment 6 % 17 % 10 % Option adjusted spread 7 10 8
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, 2017: Minimum Maximum Average Expected loan close rate 6 % 100 % 80 % Inherent MSR value (basis points per loan) (1 ) 184 117
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, 2017 Available-for-sale U.S. Treasury and agencies $ 22,572 $ 729 $ – $ – $ 23,301 Mortgage-backed securities Residential Agency – 38,031 – – 38,031 Commercial Agency – 6 – – 6 Asset-backed securities Other – 419 – – 419 Obligations of state and political subdivisions – 6,358 – – 6,358 Other investments 22 – – – 22 Total available-for-sale 22,594 45,543 – – 68,137 Mortgage loans held for sale – 3,534 – – 3,534 Mortgage servicing rights – – 2,645 – 2,645 Derivative assets 6 1,960 516 (652 ) 1,830 Other assets 154 1,163 – – 1,317 Total $ 22,754 $ 52,200 $ 3,161 $ (652 ) $ 77,463 Derivative liabilities $ – $ 1,958 $ 409 $ (1,130 ) $ 1,237 Short-term borrowings and other liabilities (c) 101 894 – – 995 Total $ 101 $ 2,852 $ 409 $ (1,130 ) $ 2,232 December 31, 2016 Available-for-sale U.S. Treasury and agencies $ 16,355 $ 772 $ – $ – $ 17,127 Mortgage-backed securities Residential Agency – 43,138 – – 43,138 Non-agency Prime (a) – – 242 – 242 Non-prime (b) – – 195 – 195 Commercial Agency – 15 – – 15 Asset-backed securities Other – 481 2 – 483 Obligations of state and political subdivisions – 5,039 – – 5,039 Corporate debt securities – – 9 – 9 Other investments 36 – – – 36 Total available-for-sale 16,391 49,445 448 – 66,284 Mortgage loans held for sale – 4,822 – – 4,822 Mortgage servicing rights – – 2,591 – 2,591 Derivative assets – 2,416 554 (984 ) 1,986 Other assets 183 1,137 – – 1,320 Total $ 16,574 $ 57,820 $ 3,593 $ (984 ) $ 77,003 Derivative liabilities $ 7 $ 2,469 $ 383 $ (1,185 ) $ 1,674 Short-term borrowings and other liabilities (c) 142 938 – – 1,080 Total $ 149 $ 3,407 $ 383 $ (1,185 ) $ 2,754 (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, (b) Includes all securities not meeting the conditions to be designated as prime. (c) Primarily 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 Gains Purchases Sales Principal Issuances Settlements End of Balance Net Change Held at End of Period 2017 Available-for-sale Mortgage-backed securities Residential non-agency Prime (a) $ 242 $ – $ (2 ) $ – $ (234 ) $ (6 ) $ – $ – $ – $ – Non-prime (b) 195 – (17 ) – (175 ) (3 ) – – – – Asset-backed securities Other 2 – – – (2 ) – – – – – Corporate debt securities 9 – 2 – (11 ) – – – – – Total available-for-sale 448 – (17 ) (e) – (422 ) (9 ) – – – – Mortgage servicing rights 2,591 (404 ) (c) – 13 – – 445 (f) – 2,645 (404 ) (c) Net derivative assets and liabilities 171 317 (d) – 1 (10 ) – – (372 ) 107 (52 ) (g) 2016 Available-for-sale Mortgage-backed securities Residential non-agency Prime (a) $ 318 $ (1 ) $ – $ – $ – $ (75 ) $ – $ – $ 242 $ – Non-prime (b) 240 (1 ) (2 ) – – (42 ) – – 195 (2 ) Asset-backed securities Other 2 – – – – – – – 2 – Corporate debt securities 9 – – – – – – – 9 – Total available-for-sale 569 (2 ) (h) (2 ) (e) – – (117 ) – – 448 (2 ) Mortgage servicing rights 2,512 (488 ) (c) – 43 – – 524 (f) – 2,591 (488 ) (c) Net derivative assets and liabilities 498 332 (i) – 2 (14 ) – – (647 ) 171 (257 ) (j) 2015 Available-for-sale Mortgage-backed securities Residential non-agency Prime (a) $ 405 $ – $ (4 ) $ – $ – $ (83 ) $ – $ – $ 318 $ (4 ) Non-prime (b) 280 (1 ) (1 ) – – (38 ) – – 240 (1 ) Asset-backed securities Other 62 4 (2 ) – (51 ) (11 ) – – 2 – Corporate debt securities 9 – – – – – – – 9 – Total available-for-sale 756 3 (k) (7 ) (e) – (51 ) (132 ) – – 569 (5 ) Mortgage servicing rights 2,338 (487 ) (c) – 29 – – 632 (f) – 2,512 (487 ) (c) Net derivative assets and liabilities 574 707 (l) – 1 (13 ) – – (771 ) 498 135 (m) (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, (b) Includes all securities not meeting the conditions to be designated as prime. (c) Included in mortgage banking revenue. (d) Approximately $21 million included in other noninterest income and $296 million included in mortgage banking revenue. (e) Included in changes in unrealized gains and losses on securities available-for-sale. (f) Represents MSRs capitalized during the period. (g) Approximately $(77) million included in other noninterest income and $25 million included in mortgage banking revenue. (h) Approximately $(3) million included in securities gains (losses) and $1 million included in interest income. (i) Approximately $(77) million included in other noninterest income and $409 million included in mortgage banking revenue. (j) Approximately $(276) million included in other noninterest income and $19 million included in mortgage banking revenue. (k) Included in interest income. (l) Approximately $289 million included in other noninterest income and $418 million included in mortgage banking revenue. (m) Approximately $92 million included in other noninterest income and $43 million included in mortgage banking revenue.
Adjusted Carrying Values for Assets Measured at Fair Value on Nonrecurring Basis	The following table summarizes the balances as of the measurement date of assets measured at fair value on a nonrecurring basis, and still held as of December 31: 2017 2016 (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Loans (a) $ – $ – $ 150 $ 150 $ – $ – $ 59 $ 59 Other assets (b) – – 31 31 – – 60 60 (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) 2017 2016 2015 Loans (a) $ 171 $ 192 $ 175 Other assets (b) 20 32 42 (a) Represents write-downs of student loans held for sale based on non-binding 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 for which Fair Value Option has been Elected and Aggregate Unpaid Principal Amount Contractually Obligated to Receive at Maturity	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: 2017 2016 (Dollars in Millions) Fair Value Aggregate Carrying Fair Value Aggregate Carrying Total loans $ 3,534 $ 3,434 $ 100 $ 4,822 $ 4,763 $ 59 Nonaccrual loans 1 2 1 2 3 (1 ) Loans 90 days or more past due 1 1 – 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: 2017 2016 Carrying Fair Value Carrying Fair Value (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Financial Assets Cash and due from banks $ 19,505 $ 19,505 $ – $ – $ 19,505 $ 15,705 $ 15,705 $ – $ – $ 15,705 Federal funds sold and securities purchased under resale agreements 93 – 93 – 93 138 – 138 – 138 Investment securities held-to-maturity 44,362 4,613 39,095 15 43,723 42,991 4,605 37,810 20 42,435 Loans held for sale (a) 20 – – 20 20 4 – – 4 4 Loans 276,507 – – 279,391 279,391 269,394 – – 273,422 273,422 Other financial instruments 2,393 – 1,037 1,364 2,401 2,362 – 920 1,449 2,369 Financial Liabilities Deposits 347,215 – 346,979 – 346,979 334,590 – 334,361 – 334,361 Short-term borrowings (b) 15,656 – 15,447 – 15,447 12,891 – 12,706 – 12,706 Long-term debt 32,259 – 32,377 – 32,377 33,323 – 33,678 – 33,678 Other liabilities 1,556 – – 1,556 1,556 1,702 – – 1,702 1,702 (a) Excludes mortgages held for sale for which the fair value option under applicable accounting guidance was elected. (b) Excludes the Company’s obligation on securities sold short required to be accounted for at fair value per applicable accounting guidance.

Guarantees and Contingent Lia52

Guarantees and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
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, 2017, excluding those commitments considered derivatives, were as follows: Term (Dollars in Millions) Less Than Greater Than Total Commercial and commercial real estate loans $ 28,903 $ 100,648 $ 129,551 Corporate and purchasing card loans (a) 26,002 – 26,002 Residential mortgages 216 3 219 Retail credit card loans (a) 106,285 – 106,285 Other retail loans 13,707 23,600 37,307 Covered loans – 126 126 Other 5,672 – 5,672 (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, 2017: (Dollars in Millions) Capitalized Operating 2018 $ 17 $ 277 2019 16 250 2020 14 210 2021 11 185 2022 9 159 Thereafter 35 563 Total minimum lease payments 102 $ 1,644 Less amount representing interest 34 Present value of net minimum lease payments 68
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, 2017: (Dollars in Millions) Collateral Carrying Maximum Standby letters of credit $ – $ 52 $ 10,857 Third party borrowing arrangements – – 7 Securities lending indemnifications 2,912 – 2,828 Asset sales – 125 6,683 Merchant processing 481 50 95,780 Tender option bond program guarantee 2,507 – 2,337 Minimum revenue guarantees – – 7 Other – 17 1,290
Contract or Notional Amount of Letters of Credit	The contract or notional amount of letters of credit at December 31, 2017, were as follows: Term (Dollars in Millions) Less Than Greater Than Total Standby $ 4,891 $ 5,966 $ 10,857 Commercial 398 24 422

U.S. Bancorp (Parent Company) (

U.S. Bancorp (Parent Company) (Tables)	12 Months Ended
	Dec. 31, 2017
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) 2017 2016 Assets Due from banks, principally interest-bearing $ 9,157 $ 7,800 Available-for-sale 963 225 Investments in bank subsidiaries 46,435 44,955 Investments in nonbank subsidiaries 2,540 2,326 Advances to bank subsidiaries 3,300 3,800 Advances to nonbank subsidiaries 2,055 1,265 Other assets 1,079 1,052 Total assets $ 65,529 $ 61,423 Liabilities and Shareholders’ Equity Short-term funds borrowed $ 1 $ 22 Long-term debt 15,769 13,045 Other liabilities 719 1,058 Shareholders’ equity 49,040 47,298 Total liabilities and shareholders’ equity $ 65,529 $ 61,423
Condensed Income Statement of Parent Company Only	Condensed Income Statement Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Income Dividends from bank subsidiaries $ 4,800 $ 2,100 $ 3,900 Dividends from nonbank subsidiaries 5 4 3 Interest from subsidiaries 159 140 120 Other income 41 57 55 Total income 5,005 2,301 4,078 Expense Interest expense 402 327 292 Other expense 124 123 105 Total expense 526 450 397 Income before income taxes and equity in undistributed income of subsidiaries 4,479 1,851 3,681 Applicable income taxes (176 ) (97 ) (207 ) Income of parent company 4,655 1,948 3,888 Equity in undistributed income of subsidiaries 1,563 3,940 1,991 Net income attributable to U.S. Bancorp $ 6,218 $ 5,888 $ 5,879
Condensed Statement of Cash Flows of Parent Company Only	Condensed Statement of Cash Flows Year Ended December 31 (Dollars in Millions) 2017 2016 2015 Operating Activities Net income attributable to U.S. Bancorp $ 6,218 $ 5,888 $ 5,879 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed income of subsidiaries (1,563 ) (3,940 ) (1,991 ) Other, net (125 ) 75 507 Net cash provided by operating activities 4,530 2,023 4,395 Investing Activities Proceeds from sales and maturities of investment securities 100 232 153 Purchases of investment securities (844 ) (120 ) (47 ) Net increase in short-term advances to subsidiaries (790 ) (442 ) (273 ) Long-term advances to subsidiaries – (750 ) (500 ) Principal collected on long-term advances to subsidiaries 500 100 – Other, net (12 ) (12 ) (6 ) Net cash used in investing activities (1,046 ) (992 ) (673 ) Financing Activities Net decrease in short-term borrowings (21 ) (3 ) (152 ) Proceeds from issuance of long-term debt 3,920 3,550 – Principal payments or redemption of long-term debt (1,250 ) (1,926 ) (1,750 ) Proceeds from issuance of preferred stock 993 – 745 Proceeds from issuance of common stock 159 355 295 Repurchase of preferred stock (1,085 ) – – Repurchase of common stock (2,631 ) (2,556 ) (2,190 ) Cash dividends paid on preferred stock (284 ) (267 ) (242 ) Cash dividends paid on common stock (1,928 ) (1,810 ) (1,777 ) Net cash used in financing activities (2,127 ) (2,657 ) (5,071 ) Change in cash and due from banks 1,357 (1,626 ) (1,349 ) Cash and due from banks at beginning of year 7,800 9,426 10,775 Cash and due from banks at end of year $ 9,157 $ 7,800 $ 9,426

Loans and Allowance for Credi54

Loans and Allowance for Credit Losses - Commercial Loans by Industry Group and Geography Excluding Covered Loans (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Loans by Industry Group and Geography [Line Items]
Commercial	$ 97,561	$ 93,386
Commercial, percentage	100.00%	100.00%
California [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 14,086	$ 12,677
Commercial, percentage	14.40%	13.60%
Colorado [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,979	$ 4,362
Commercial, percentage	4.10%	4.70%
Illinois [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 5,245	$ 4,636
Commercial, percentage	5.40%	5.00%
Minnesota [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 7,406	$ 7,093
Commercial, percentage	7.60%	7.60%
Missouri [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,525	$ 3,536
Commercial, percentage	3.60%	3.80%
Ohio [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 4,330	$ 4,270
Commercial, percentage	4.50%	4.60%
Oregon [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 2,044	$ 2,090
Commercial, percentage	2.10%	2.20%
Washington [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,699	$ 3,447
Commercial, percentage	3.80%	3.70%
Wisconsin [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,539	$ 3,512
Commercial, percentage	3.60%	3.80%
Iowa, Kansas, Nebraska, North Dakota, South Dakota [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 4,806	$ 4,900
Commercial, percentage	4.90%	5.20%
Arkansas, Indiana, Kentucky, Tennessee [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 5,206	$ 5,168
Commercial, percentage	5.30%	5.50%
Idaho, Montana, Wyoming [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 1,225	$ 1,251
Commercial, percentage	1.30%	1.30%
Arizona, Nevada, New Mexico, Utah [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,836	$ 3,487
Commercial, percentage	3.90%	3.70%
Total Banking Region [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 62,926	$ 60,429
Commercial, percentage	64.50%	64.70%
Florida, Michigan, New York, Pennsylvania, Texas [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 16,408	$ 15,467
Commercial, percentage	16.80%	16.60%
All Other States [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 18,227	$ 17,490
Commercial, percentage	18.70%	18.70%
Total Outside Company's Banking Region [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 34,635	$ 32,957
Commercial, percentage	35.50%	35.30%
Manufacturing [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 14,710	$ 13,779
Commercial, percentage	15.10%	14.80%
Real Estate, Rental and Leasing [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 12,461	$ 10,553
Commercial, percentage	12.80%	11.30%
Retail Trade [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 8,952	$ 7,573
Commercial, percentage	9.20%	8.10%
Finance and Insurance [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 8,639	$ 8,728
Commercial, percentage	8.80%	9.30%
Wholesale Trade [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 7,383	$ 7,552
Commercial, percentage	7.60%	8.10%
Healthcare and Social Assistance [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 6,517	$ 6,345
Commercial, percentage	6.70%	6.80%
Public Administration [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 5,116	$ 4,546
Commercial, percentage	5.20%	4.90%
Arts, Entertainment and Recreation [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,853	$ 3,340
Commercial, percentage	3.90%	3.60%
Professional, Scientific and Technical Services [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,499	$ 3,744
Commercial, percentage	3.60%	4.00%
Educational Services [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,414	$ 3,167
Commercial, percentage	3.50%	3.40%
Information [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,403	$ 3,597
Commercial, percentage	3.50%	3.80%
Transport and Storage [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 3,198	$ 3,561
Commercial, percentage	3.30%	3.80%
Utilities [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 1,933	$ 1,747
Commercial, percentage	2.00%	1.90%
Other Services [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 1,698	$ 1,625
Commercial, percentage	1.70%	1.70%
Mining [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 1,590	$ 1,645
Commercial, percentage	1.60%	1.80%
Agriculture, Forestry, Fishing and Hunting [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 1,429	$ 1,449
Commercial, percentage	1.50%	1.50%
Other [Member]
Loans by Industry Group and Geography [Line Items]
Commercial	$ 9,766	$ 10,435
Commercial, percentage	10.00%	11.20%

Loans and Allowance for Credi55

Loans and Allowance for Credit Losses - Commercial Real Estate Loans by Property Type and Geography Excluding Covered Loans (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 40,463	$ 43,098
Commercial real estate, percentage	100.00%	100.00%
California [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 9,558	$ 10,734
Commercial real estate, percentage	23.60%	24.90%
Colorado [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,764	$ 1,819
Commercial real estate, percentage	4.40%	4.20%
Illinois [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,605	$ 1,678
Commercial real estate, percentage	4.00%	3.90%
Minnesota [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 2,031	$ 2,177
Commercial real estate, percentage	5.00%	5.00%
Missouri [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,359	$ 1,372
Commercial real estate, percentage	3.30%	3.20%
Ohio [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,445	$ 1,462
Commercial real estate, percentage	3.60%	3.40%
Oregon [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,847	$ 2,094
Commercial real estate, percentage	4.60%	4.90%
Washington [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 3,499	$ 3,435
Commercial real estate, percentage	8.60%	8.00%
Wisconsin [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 2,036	$ 2,161
Commercial real estate, percentage	5.00%	5.00%
Iowa, Kansas, Nebraska, North Dakota, South Dakota [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 2,210	$ 2,312
Commercial real estate, percentage	5.50%	5.40%
Arkansas, Indiana, Kentucky, Tennessee [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,889	$ 1,810
Commercial real estate, percentage	4.70%	4.20%
Idaho, Montana, Wyoming [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,163	$ 1,271
Commercial real estate, percentage	2.90%	2.90%
Arizona, Nevada, New Mexico, Utah [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 3,134	$ 3,257
Commercial real estate, percentage	7.70%	7.60%
Total Banking Region [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 33,540	$ 35,582
Commercial real estate, percentage	82.90%	82.60%
Florida, Michigan, New York, Pennsylvania, Texas [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 3,688	$ 3,829
Commercial real estate, percentage	9.10%	8.90%
All Other States [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 3,235	$ 3,687
Commercial real estate, percentage	8.00%	8.50%
Total Outside Company's Banking Region [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 6,923	$ 7,516
Commercial real estate, percentage	17.10%	17.40%
Business Owner Occupied [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 10,205	$ 10,899
Commercial real estate, percentage	25.20%	25.30%
Industrial Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 1,580	$ 1,631
Commercial real estate, percentage	3.90%	3.80%
Office Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 5,023	$ 5,536
Commercial real estate, percentage	12.40%	12.80%
Retail Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 4,502	$ 4,997
Commercial real estate, percentage	11.10%	11.60%
Other Commercial Property [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 3,757	$ 4,064
Commercial real estate, percentage	9.30%	9.40%
Multi-Family [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 8,922	$ 9,607
Commercial real estate, percentage	22.00%	22.30%
Hotel/Motel [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 3,719	$ 3,791
Commercial real estate, percentage	9.20%	8.80%
Residential Homebuilders [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 2,489	$ 2,311
Commercial real estate, percentage	6.20%	5.40%
Healthcare Facilities [Member]
Loans by Property Type and Geography [Line Items]
Commercial real estate	$ 266	$ 262
Commercial real estate, percentage	0.70%	0.60%

Investment Securities - Investm

Investment Securities - Investment Securities (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, total, amortized cost		$ 68,717	$ 66,985
Amortized Cost of Investment Securities		$ 113,079	$ 109,976
Amortized Cost of Investment Securities, Percentage		100.00%	100.00%
Available-for-sale securities, total, fair value	[1]	$ 68,137	$ 66,284
Available-for-sale securities, total, weighted-average maturity in years		5 years 1 month 6 days	5 years 1 month 6 days
Available-for-sale securities, total, weighted-average yield		2.25%	2.06%
Held-to-maturity securities, total, amortized cost		$ 44,362	$ 42,991
Held-to-maturity securities, total, fair value		$ 43,723	$ 42,435
Held-to-maturity securities, total, weighted-average maturity in years		4 years 8 months 12 days	4 years 7 months 6 days
Held-to-maturity securities, total, weighted-average yield		2.14%	1.93%
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		$ 4,985
Available-for-sale securities, maturing after one year through five years, amortized cost		16,683
Available-for-sale securities, maturing after five years through ten years, amortized cost		1,918
Available-for-sale securities, total, amortized cost		23,586	$ 17,314
Available-for-sale securities, maturing in one year or less, fair value		4,965
Amortized Cost of Investment Securities		28,767	$ 22,560
Available-for-sale securities, maturing after one year through five years, fair value		$ 16,465
Amortized Cost of Investment Securities, Percentage		25.50%	20.50%
Available-for-sale securities, maturing after five years through ten years, fair value		$ 1,871
Available-for-sale securities, total, fair value		$ 23,301	$ 17,127
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 maturity in years		3 years 4 months 24 days
Available-for-sale securities, maturing after five years through ten years, weighted-average maturity in years		5 years 8 months 12 days
Available-for-sale securities, total, weighted-average maturity in years		3 years
Available-for-sale securities, maturing in one year or less, weighted-average yield		0.85%
Available-for-sale securities, maturing after one year through five years, weighted-average yield		1.67%
Available-for-sale securities, maturing after five years through ten years, weighted-average yield		1.84%
Available-for-sale securities, total, weighted-average yield		1.51%
Held-to-maturity securities, maturing after one year through five years, amortized cost		$ 1,794
Held-to-maturity securities, maturing after five years through ten years, amortized cost		3,387
Held-to-maturity securities, total, amortized cost		5,181	5,246
Held-to-maturity securities, maturing after one year through five years, fair value		1,776
Held-to-maturity securities, maturing after five years through ten years, fair value		3,290
Held-to-maturity securities, total, fair value		$ 5,066	5,126
Held-to-maturity securities, maturing after one year through five years, weighted-average maturity in years		3 years 6 months
Held-to-maturity securities, maturing after five years through ten years, weighted-average maturity in years		6 years 1 month 6 days
Held-to-maturity securities, total, weighted-average maturity in years		5 years 2 months 12 days
Held-to-maturity securities, maturing after one year through five years, weighted-average yield		1.81%
Held-to-maturity securities, maturing after five years through ten years, weighted-average yield		1.80%
Held-to-maturity securities, total, weighted-average yield		1.80%
Mortgage-Backed Securities [Member]
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, maturing in one year or less, amortized cost		$ 79
Available-for-sale securities, maturing after one year through five years, amortized cost		17,637
Available-for-sale securities, maturing after five years through ten years, amortized cost		18,391
Available-for-sale securities, maturing after ten years, amortized cost		2,349
Available-for-sale securities, total, amortized cost		38,456
Available-for-sale securities, maturing in one year or less, fair value		80
Amortized Cost of Investment Securities		77,606	$ 81,698
Available-for-sale securities, maturing after one year through five years, fair value		$ 17,424
Amortized Cost of Investment Securities, Percentage		68.60%	74.30%
Available-for-sale securities, maturing after five years through ten years, fair value		$ 18,179
Available-for-sale securities, maturing after ten years, fair value		2,354
Available-for-sale securities, total, fair value		$ 38,037
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 maturity in years		4 years 4 months 24 days
Available-for-sale securities, maturing after five years through ten years, weighted-average maturity in years		5 years 10 months 25 days
Available-for-sale securities, maturing after ten years, weighted- average maturity in years		12 years 9 months 18 days
Available-for-sale securities, total, weighted-average maturity in years		5 years 7 months 6 days
Available-for-sale securities, maturing in one year or less, weighted-average yield		4.33%
Available-for-sale securities, maturing after one year through five years, weighted-average yield		2.08%
Available-for-sale securities, maturing after five years through ten years, weighted-average yield		2.22%
Available-for-sale securities, maturing after ten years, weighted-average yield		2.47%
Available-for-sale securities, total, weighted-average yield		2.18%
Held-to-maturity securities, maturing in one year or less, amortized cost		$ 85
Held-to-maturity securities, maturing after one year through five years, amortized cost		23,307
Held-to-maturity securities, maturing after five years through ten years, amortized cost		15,497
Held-to-maturity securities, maturing after ten years, amortized cost		261
Held-to-maturity securities, total, amortized cost		39,150
Held-to-maturity securities, maturing in one year or less, fair value		85
Held-to-maturity securities, maturing after one year through five years, fair value		22,968
Held-to-maturity securities, maturing after five years through ten years, fair value		15,305
Held-to-maturity securities, maturing after ten years, fair value		261
Held-to-maturity securities, total, fair value		$ 38,619
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		3 years 9 months 18 days
Held-to-maturity securities, maturing after five years through ten years, weighted-average maturity in years		5 years 8 months 12 days
Held-to-maturity securities, maturing after ten years, weighted-average maturity in years		12 years 3 months 19 days
Held-to-maturity securities, total, weighted-average maturity in years		4 years 7 months 6 days
Held-to-maturity securities, maturing in one year or less, weighted-average yield		2.99%
Held-to-maturity securities, maturing after one year through five years, weighted-average yield		2.10%
Held-to-maturity securities, maturing after five years through ten years, weighted-average yield		2.31%
Held-to-maturity securities, maturing after ten years, weighted-average yield		2.37%
Held-to-maturity securities, total, weighted-average yield		2.19%
Asset-Backed Securities [Member]
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, maturing after one year through five years, amortized cost		$ 328
Available-for-sale securities, maturing after five years through ten years, amortized cost		85
Available-for-sale securities, total, amortized cost		413
Amortized Cost of Investment Securities		419	$ 483
Available-for-sale securities, maturing after one year through five years, fair value		$ 332
Amortized Cost of Investment Securities, Percentage		0.40%	0.40%
Available-for-sale securities, maturing after five years through ten years, fair value		$ 87
Available-for-sale securities, total, fair value		$ 419
Available-for-sale securities, maturing after one year through five years, weighted-average maturity in years		3 years 8 months 12 days
Available-for-sale securities, maturing after five years through ten years, weighted-average maturity in years		5 years
Available-for-sale securities, total, weighted-average maturity in years		4 years
Available-for-sale securities, maturing after one year through five years, weighted-average yield		3.00%
Available-for-sale securities, maturing after five years through ten years, weighted-average yield		3.23%
Available-for-sale securities, total, weighted-average yield		3.04%
Held-to-maturity securities, maturing after one year through five years, amortized cost		$ 4
Held-to-maturity securities, maturing after five years through ten years, amortized cost		2
Held-to-maturity securities, total, amortized cost		6
Held-to-maturity securities, maturing in one year or less, fair value		1
Held-to-maturity securities, maturing after one year through five years, fair value		4
Held-to-maturity securities, maturing after five years through ten years, fair value		3
Held-to-maturity securities, maturing after ten years, fair value		4
Held-to-maturity securities, total, fair value		$ 12
Held-to-maturity securities, maturing in one year or less, weighted-average maturity in years		4 months 24 days
Held-to-maturity securities, maturing after one year through five years, weighted-average maturity in years		3 years 2 months 12 days
Held-to-maturity securities, maturing after five years through ten years, weighted-average maturity in years		5 years 7 months 6 days
Held-to-maturity securities, maturing after ten years, weighted-average maturity in years		16 years 3 months 19 days
Held-to-maturity securities, total, weighted-average maturity in years		4 years 1 month 6 days
Held-to-maturity securities, maturing in one year or less, weighted-average yield		2.12%
Held-to-maturity securities, maturing after one year through five years, weighted-average yield		2.28%
Held-to-maturity securities, maturing after five years through ten years, weighted-average yield		2.25%
Held-to-maturity securities, maturing after ten years, weighted-average yield		2.06%
Held-to-maturity securities, total, weighted-average yield		2.27%
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		$ 183
Available-for-sale securities, maturing after one year through five years, amortized cost		662
Available-for-sale securities, maturing after five years through ten years, amortized cost		4,428
Available-for-sale securities, maturing after ten years, amortized cost		967
Available-for-sale securities, total, amortized cost		6,240	$ 5,167
Available-for-sale securities, maturing in one year or less, fair value		184
Amortized Cost of Investment Securities		6,246	$ 5,173
Available-for-sale securities, maturing after one year through five years, fair value		$ 688
Amortized Cost of Investment Securities, Percentage		5.50%	4.70%
Available-for-sale securities, maturing after five years through ten years, fair value		$ 4,532
Available-for-sale securities, maturing after ten years, fair value		954
Available-for-sale securities, total, fair value		$ 6,358	$ 5,039
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		3 years 2 months 12 days
Available-for-sale securities, maturing after five years through ten years, weighted-average maturity in years		8 years 8 months 12 days
Available-for-sale securities, maturing after ten years, weighted- average maturity in years		19 years 9 months 18 days
Available-for-sale securities, total, weighted-average maturity in years		9 years 7 months 6 days
Available-for-sale securities, maturing in one year or less, weighted-average yield		7.40%
Available-for-sale securities, maturing after one year through five years, weighted-average yield		5.93%
Available-for-sale securities, maturing after five years through ten years, weighted-average yield		5.33%
Available-for-sale securities, maturing after ten years, weighted-average yield		5.02%
Available-for-sale securities, total, weighted-average yield		5.41%
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, amortized cost		5
Held-to-maturity securities, total, amortized cost		6	6
Held-to-maturity securities, maturing after one year through five years, fair value		1
Held-to-maturity securities, maturing after five years through ten years, fair value		6
Held-to-maturity securities, total, fair value		$ 7	7
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		8 years 2 months 12 days
Held-to-maturity securities, total, weighted-average maturity in years		7 years 7 months 6 days
Held-to-maturity securities, maturing after one year through five years, weighted-average yield		7.82%
Held-to-maturity securities, maturing after five years through ten years, weighted-average yield		2.53%
Held-to-maturity securities, total, weighted-average yield		3.24%
Other Debt Securities and Obligations of Foreign Governments [Member]
Contractual Maturities of Investment Securities [Line Items]
Amortized Cost of Investment Securities		$ 41	$ 62
Amortized Cost of Investment Securities, Percentage			0.10%
Held-to-maturity securities, maturing after one year through five years, amortized cost		19
Held-to-maturity securities, total, amortized cost		19
Held-to-maturity securities, maturing after one year through five years, fair value		19
Held-to-maturity securities, total, fair value		$ 19
Held-to-maturity securities, maturing after one year through five years, weighted-average maturity in years		2 years 6 months
Held-to-maturity securities, total, weighted-average maturity in years		2 years 6 months
Held-to-maturity securities, maturing after one year through five years, weighted-average yield		2.26%
Held-to-maturity securities, total, weighted-average yield		2.26%
Other Investment [Member]
Contractual Maturities of Investment Securities [Line Items]
Available-for-sale securities, total, amortized cost		$ 22	$ 27
Available-for-sale securities, total, fair value		$ 22	$ 36
Available-for-sale securities, total, weighted-average yield		0.01%
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Investment Securities - Inves57

Investment Securities - Investment Securities (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Contractual Maturities of Investment Securities [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Weighted-average maturity of available-for-sale investment securities	5 years 1 month 6 days	5 years 1 month 6 days
Weighted-average yield of available-for-sale investment securities	2.25%	2.06%
Weighted-average maturity of held-to-maturity investment securities	4 years 8 months 12 days	4 years 7 months 6 days
Weighted-average yield of held-to-maturity investment securities	2.14%	1.93%

Loans and Allowance for Credi58

Loans and Allowance for Credit Losses - Summary of Nonperforming Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Nonperforming Assets [Line Items]
Nonperforming Loans	$ 1,008	$ 1,368	$ 1,192	$ 1,466	$ 1,603
Other Real Estate	141	186	280	288	327
Covered Other Real Estate	21	26	32	37	97
Other Assets	30	23	19	17	10
Total nonperforming assets	1,200	1,603	1,523	1,808	2,037
Total nonperforming assets, excluding covered assets	1,173	1,571	1,483	1,757	1,813
Accruing loans 90 days or more past due	$ 572	$ 552	$ 541	$ 550	$ 713
Nonperforming loans to total loans	0.36%	0.51%	0.46%	0.60%	0.65%
Nonperforming assets to total loans plus other real estate	0.42%	0.58%	0.58%	0.72%	0.80%
Accruing loans 90 days or more past due	$ 720	$ 764	$ 831	$ 945	$ 1,189
Nonperforming loans to total loans	0.36%	0.50%	0.46%	0.59%	0.68%
Nonperforming assets to total loans plus other real estate	0.43%	0.59%	0.58%	0.73%	0.86%
Lease Financing [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	$ 24	$ 40	$ 14	$ 13	$ 12
Commercial Mortgages [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	108	87	92	175	182
Construction and Development [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	34	37	35	84	121
Credit Card [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	1	3	9	30	78
Accruing loans 90 days or more past due	284	253
Retail Leasing [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	8	2	3	1	1
Home Equity and Second Mortgages [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	126	128	136	170	167
Total Loans, Excluding Covered Loans [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	1,002	1,362	1,184	1,452	1,476
Accruing loans 90 days or more past due	572	552
Covered Loans [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	6	6	8	14	127
Accruing loans 90 days or more past due	148	212
Commercial [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	225	443	160	99	122
Commercial [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	249	483	174	112	134
Accruing loans 90 days or more past due	57	52
Commercial Real Estate [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	142	124	127	259	303
Accruing loans 90 days or more past due	6	8
Residential Mortgages [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	442	595	712	864	770
Accruing loans 90 days or more past due	130	156
Other [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	34	27	23	16	23
Other Retail [Member]
Nonperforming Assets [Line Items]
Nonperforming Loans	168	157	$ 162	$ 187	$ 191
Accruing loans 90 days or more past due	$ 95	$ 83

Loans and Allowance for Credi59

Loans and Allowance for Credit Losses - Summary of Change in Nonperforming Assets (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Nonperforming Assets [Line Items]
Balance December 31, 2016	$ 1,603
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	973
Advances on loans	29
Total additions	1,002
Reductions in nonperforming assets
Paydowns, payoffs	(633)
Net sales	(241)
Return to performing status	(185)
Charge-offs	(346)
Total reductions	(1,405)
Net additions to (reductions in) nonperforming assets	(403)
Balance December 31, 2017	1,200
Commercial and Commercial Real Estate Loans [Member]
Nonperforming Assets [Line Items]
Balance December 31, 2016	623
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	559
Advances on loans	28
Total additions	587
Reductions in nonperforming assets
Paydowns, payoffs	(415)
Net sales	(50)
Return to performing status	(43)
Charge-offs	(298)
Total reductions	(806)
Net additions to (reductions in) nonperforming assets	(219)
Balance December 31, 2017	404
Residential Mortgages, Credit Card and Other Retail [Member]
Nonperforming Assets [Line Items]
Balance December 31, 2016	948
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	392
Advances on loans	1
Total additions	393
Reductions in nonperforming assets
Paydowns, payoffs	(210)
Net sales	(172)
Return to performing status	(142)
Charge-offs	(48)
Total reductions	(572)
Net additions to (reductions in) nonperforming assets	(179)
Balance December 31, 2017	769
Covered Assets [Member]
Nonperforming Assets [Line Items]
Balance December 31, 2016	32
Additions to nonperforming assets
New nonaccrual loans and foreclosed properties	22
Total additions	22
Reductions in nonperforming assets
Paydowns, payoffs	(8)
Net sales	(19)
Total reductions	(27)
Net additions to (reductions in) nonperforming assets	(5)
Balance December 31, 2017	$ 27

Loans and Allowance for Credi60

Loans and Allowance for Credit Losses - Summary of Change in Nonperforming Assets (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
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	$ 1,900	$ 2,500	$ 2,900	$ 3,100	$ 3,700
Foreclosed GNMA loans that continue to accrue interest and excluded from nonperforming assets	$ 267	$ 373	$ 535	$ 641	$ 527

Shareholders' Equity - Regulato

Shareholders' Equity - Regulatory Capital Ratios (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
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	5.75%	5.125%
Tier 1 capital as a percent of risk-weighted assets - Minimum capital ratio requirement	7.25%	6.625%
Total risk-based capital as a percent of risk-weighted assets - Minimum capital ratio requirement	9.25%	8.625%
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	6.50%	6.50%
Tier 1 capital as a percent of risk-weighted assets - Well capitalized ratio requirement	8.00%	8.00%
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: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	$ 34,369	$ 33,720
Tier 1 capital	39,806	39,421
Total risk-based capital	47,503	47,355
Risk-weighted assets	367,771	358,237
Basel III Transitional Advanced Approaches: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	34,369	33,720
Tier 1 capital	39,806	39,421
Total risk-based capital	44,477	44,264
Risk-weighted assets	287,211	277,141
U.S. Bancorp [Member] | Basel III Transitional Standardized Approach: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	34,369	33,720
Tier 1 capital	39,806	39,421
Total risk-based capital	47,503	47,355
Risk-weighted assets	$ 367,771	$ 358,237
Common equity tier 1 capital as a percent of risk-weighted assets	9.30%	9.40%
Tier 1 capital as a percent of risk-weighted assets	10.80%	11.00%
Total risk-based capital as a percent of risk-weighted assets	12.90%	13.20%
Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)	8.90%	9.00%
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	$ 34,369	$ 33,720
Tier 1 capital	39,806	39,421
Total risk-based capital	44,477	44,264
Risk-weighted assets	$ 287,211	$ 277,141
Common equity tier 1 capital as a percent of risk-weighted assets	12.00%	12.20%
Tier 1 capital as a percent of risk-weighted assets	13.90%	14.20%
Total risk-based capital as a percent of risk-weighted assets	15.50%	16.00%
U.S. Bank National Association [Member] | Basel III Transitional Standardized Approach: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	$ 37,586	$ 36,914
Tier 1 capital	37,701	37,114
Total risk-based capital	45,466	44,853
Risk-weighted assets	$ 361,973	$ 352,023
Common equity tier 1 capital as a percent of risk-weighted assets	10.40%	10.50%
Tier 1 capital as a percent of risk-weighted assets	10.40%	10.50%
Total risk-based capital as a percent of risk-weighted assets	12.60%	12.70%
Tier 1 capital as a percent of adjusted quarterly average assets (leverage ratio)	8.60%	8.60%
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	$ 37,586	$ 36,914
Tier 1 capital	37,701	37,114
Total risk-based capital	42,414	41,737
Risk-weighted assets	$ 281,659	$ 271,920
Common equity tier 1 capital as a percent of risk-weighted assets	13.30%	13.60%
Tier 1 capital as a percent of risk-weighted assets	13.40%	13.60%
Total risk-based capital as a percent of risk-weighted assets	15.10%	15.30%

Significant Accounting Polici62

Significant Accounting Policies - Line of Business Financial Performance (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 12,446	$ 11,731
Net interest income (taxable-equivalent basis), Percent change	6.10%
Noninterest income	$ 9,554	9,555
Securities gains (losses), net	$ 57	22
Securities gains (losses), net, Percent change	0.00%
Total net revenue	$ 22,057	21,308
Total net revenue, Percent change	3.50%
Noninterest expense, Percent change	11.10%
Other intangibles, Percent change	(2.20%)
Total noninterest expense, Percent change	10.90%
Income before provision and income taxes, Percent change	(5.40%)
Provision for credit losses, Percent change	5.00%
Income before income taxes, Percent change	(7.10%)
Income taxes and taxable-equivalent adjustment, Percent change	(37.90%)
Net income, Percent change	5.20%
Net (income) loss attributable to noncontrolling interests, Percent change	37.50%
Net income attributable to U.S. Bancorp, Percent change	5.60%
Noninterest expense	$ 12,770	11,497
Other intangibles	175	179	$ 174
Total noninterest expense	12,945	11,676	10,931
Income before provision and income taxes	9,112	9,632
Provision for credit losses	1,390	1,324	1,132
Income before income taxes	7,722	8,308
Income taxes and taxable-equivalent adjustment	1,469	2,364
Net income	6,253	5,944	5,933
Net (income) loss attributable to noncontrolling interests	(35)	(56)	(54)
Net income attributable to U.S. Bancorp	6,218	5,888	$ 5,879
Average Balance Sheet
Commercial	$ 95,904	92,043
Commercial, Percent change	4.20%
Commercial real estate	$ 42,077	43,040
Commercial real estate, Percent change	(2.20%)
Residential mortgages	$ 58,784	55,682
Residential mortgages, Percent change	5.60%
Credit card	$ 20,906	20,490
Credit card, Percent change	2.00%
Other retail	$ 55,416	52,330
Other retail, Percent change	5.90%
Total loans, excluding covered loans	$ 273,087	263,585
Total loans, excluding covered loans, Percent change	3.60%
Covered loans	$ 3,450	4,226
Covered loans, Percent change	(18.40%)
Total loans	$ 276,537	267,811
Total loans, Percent change	3.30%
Other intangible assets, Percent change	6.60%
Assets, Percent change	3.50%
Noninterest-bearing deposits, Percent change	0.90%
Interest checking, Percent change	10.10%
Savings products, Percent change	9.50%
Time deposits, Percent change	2.30%
Total deposits, Percent change	6.60%
Total U.S. Bancorp shareholders' equity, Percent change	2.40%
Goodwill	$ 9,361	9,359
Other intangible assets	3,234	3,033
Assets	448,582	433,313
Noninterest-bearing deposits	81,933	81,176
Interest checking	67,953	61,726
Savings products	149,869	136,900
Time deposits	33,759	33,008
Total deposits	333,514	312,810
Total U.S. Bancorp shareholders' equity	48,466	47,339
Corporate and Commercial Banking [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 2,425	2,241
Net interest income (taxable-equivalent basis), Percent change	8.20%
Noninterest income	$ 900	897
Noninterest income, Percent change	0.30%
Securities gains (losses), net	$ (3)	2
Securities gains (losses), net, Percent change	0.00%
Total net revenue	$ 3,322	3,140
Total net revenue, Percent change	5.80%
Noninterest expense, Percent change	8.80%
Total noninterest expense, Percent change	8.70%
Income before provision and income taxes, Percent change	3.30%
Income before income taxes, Percent change	32.70%
Income taxes and taxable-equivalent adjustment, Percent change	32.60%
Net income, Percent change	32.70%
Net income attributable to U.S. Bancorp, Percent change	32.70%
Noninterest expense	$ 1,566	1,440
Other intangibles	4	4
Total noninterest expense	1,570	1,444
Income before provision and income taxes	1,752	1,696
Provision for credit losses	(14)	365
Income before income taxes	1,766	1,331
Income taxes and taxable-equivalent adjustment	643	485
Net income	1,123	846
Net income attributable to U.S. Bancorp	1,123	846
Average Balance Sheet
Commercial	$ 73,538	70,856
Commercial, Percent change	3.80%
Commercial real estate	$ 20,456	21,183
Commercial real estate, Percent change	(3.40%)
Residential mortgages	$ 6	8
Residential mortgages, Percent change	(25.00%)
Other retail		2
Total loans, excluding covered loans	$ 94,000	92,049
Total loans, excluding covered loans, Percent change	2.10%
Total loans	$ 94,000	92,049
Total loans, Percent change	2.10%
Other intangible assets, Percent change	(23.50%)
Assets, Percent change	2.00%
Noninterest-bearing deposits, Percent change	(2.50%)
Interest checking, Percent change	15.50%
Savings products, Percent change	8.20%
Time deposits, Percent change	23.40%
Total deposits, Percent change	6.90%
Total U.S. Bancorp shareholders' equity, Percent change	9.70%
Goodwill	$ 1,647	1,647
Other intangible assets	13	17
Assets	102,586	100,570
Noninterest-bearing deposits	36,001	36,912
Interest checking	9,950	8,616
Savings products	45,773	42,300
Time deposits	16,136	13,077
Total deposits	107,860	100,905
Total U.S. Bancorp shareholders' equity	9,872	8,996
Consumer and Business Banking [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 5,117	4,752
Net interest income (taxable-equivalent basis), Percent change	7.70%
Noninterest income	$ 2,445	2,526
Noninterest income, Percent change	(3.20%)
Securities gains (losses), net, Percent change	0.00%
Total net revenue	$ 7,562	7,278
Total net revenue, Percent change	3.90%
Noninterest expense, Percent change	1.20%
Other intangibles, Percent change	(6.30%)
Total noninterest expense, Percent change	1.10%
Income before provision and income taxes, Percent change	10.40%
Income before income taxes, Percent change	(1.60%)
Income taxes and taxable-equivalent adjustment, Percent change	(1.70%)
Net income, Percent change	(1.60%)
Net income attributable to U.S. Bancorp, Percent change	(1.60%)
Noninterest expense	$ 5,117	5,058
Other intangibles	30	32
Total noninterest expense	5,147	5,090
Income before provision and income taxes	2,415	2,188
Provision for credit losses	354	93
Income before income taxes	2,061	2,095
Income taxes and taxable-equivalent adjustment	750	763
Net income	1,311	1,332
Net income attributable to U.S. Bancorp	1,311	1,332
Average Balance Sheet
Commercial	$ 10,163	10,352
Commercial, Percent change	(1.80%)
Commercial real estate	$ 18,437	18,231
Commercial real estate, Percent change	1.10%
Residential mortgages	$ 55,960	53,402
Residential mortgages, Percent change	4.80%
Other retail	$ 53,296	50,247
Other retail, Percent change	6.10%
Total loans, excluding covered loans	$ 137,856	132,232
Total loans, excluding covered loans, Percent change	4.30%
Covered loans	$ 3,445	4,196
Covered loans, Percent change	(17.90%)
Total loans	$ 141,301	136,428
Total loans, Percent change	3.60%
Other intangible assets, Percent change	13.10%
Assets, Percent change	2.70%
Noninterest-bearing deposits, Percent change	1.70%
Interest checking, Percent change	8.60%
Savings products, Percent change	5.60%
Time deposits, Percent change	(9.60%)
Total deposits, Percent change	4.20%
Total U.S. Bancorp shareholders' equity, Percent change	2.50%
Goodwill	$ 3,681	3,682
Other intangible assets	2,739	2,422
Assets	155,835	151,759
Noninterest-bearing deposits	27,983	27,516
Interest checking	47,332	43,593
Savings products	60,632	57,442
Time deposits	12,903	14,274
Total deposits	148,850	142,825
Total U.S. Bancorp shareholders' equity	11,468	11,192
Wealth Management and Investment Services [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 763	537
Net interest income (taxable-equivalent basis), Percent change	42.10%
Noninterest income	$ 1,646	1,589
Noninterest income, Percent change	3.60%
Securities gains (losses), net, Percent change	0.00%
Total net revenue	$ 2,409	2,126
Total net revenue, Percent change	13.30%
Noninterest expense, Percent change	6.40%
Other intangibles, Percent change	(16.70%)
Total noninterest expense, Percent change	6.10%
Income before provision and income taxes, Percent change	32.10%
Provision for credit losses, Percent change	75.00%
Income before income taxes, Percent change	31.40%
Income taxes and taxable-equivalent adjustment, Percent change	31.50%
Net income, Percent change	31.40%
Net income attributable to U.S. Bancorp, Percent change	31.40%
Noninterest expense	$ 1,608	1,511
Other intangibles	20	24
Total noninterest expense	1,628	1,535
Income before provision and income taxes	781	591
Provision for credit losses	(1)	(4)
Income before income taxes	782	595
Income taxes and taxable-equivalent adjustment	284	216
Net income	498	379
Net income attributable to U.S. Bancorp	498	379
Average Balance Sheet
Commercial	$ 3,434	2,916
Commercial, Percent change	17.80%
Commercial real estate	$ 508	523
Commercial real estate, Percent change	(2.90%)
Residential mortgages	$ 2,818	2,272
Residential mortgages, Percent change	24.00%
Other retail	$ 1,660	1,557
Other retail, Percent change	6.60%
Total loans, excluding covered loans	$ 8,420	7,268
Total loans, excluding covered loans, Percent change	15.90%
Total loans	$ 8,420	7,268
Total loans, Percent change	15.90%
Goodwill, Percent change	0.10%
Other intangible assets, Percent change	(19.80%)
Assets, Percent change	11.90%
Noninterest-bearing deposits, Percent change	8.00%
Interest checking, Percent change	12.10%
Savings products, Percent change	17.30%
Time deposits, Percent change	3.30%
Total deposits, Percent change	13.70%
Total U.S. Bancorp shareholders' equity, Percent change	(0.40%)
Goodwill	$ 1,568	1,567
Other intangible assets	81	101
Assets	11,588	10,358
Noninterest-bearing deposits	14,819	13,716
Interest checking	10,628	9,477
Savings products	42,905	36,570
Time deposits	4,003	3,876
Total deposits	72,355	63,639
Total U.S. Bancorp shareholders' equity	2,373	2,382
Payment Services [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 2,223	2,141
Net interest income (taxable-equivalent basis), Percent change	3.80%
Noninterest income	$ 3,613	3,562
Noninterest income, Percent change	1.40%
Securities gains (losses), net, Percent change	0.00%
Total net revenue	$ 5,836	5,703
Total net revenue, Percent change	2.30%
Noninterest expense, Percent change	6.20%
Other intangibles, Percent change	1.70%
Total noninterest expense, Percent change	6.00%
Income before provision and income taxes, Percent change	(1.00%)
Provision for credit losses, Percent change	24.50%
Income before income taxes, Percent change	(11.40%)
Income taxes and taxable-equivalent adjustment, Percent change	(11.40%)
Net income, Percent change	(11.50%)
Net (income) loss attributable to noncontrolling interests, Percent change	59.40%
Net income attributable to U.S. Bancorp, Percent change	(10.30%)
Noninterest expense	$ 2,761	2,601
Other intangibles	121	119
Total noninterest expense	2,882	2,720
Income before provision and income taxes	2,954	2,983
Provision for credit losses	1,082	869
Income before income taxes	1,872	2,114
Income taxes and taxable-equivalent adjustment	682	770
Net income	1,190	1,344
Net (income) loss attributable to noncontrolling interests	(13)	(32)
Net income attributable to U.S. Bancorp	1,177	1,312
Average Balance Sheet
Commercial	$ 8,082	7,535
Commercial, Percent change	7.30%
Credit card	$ 20,906	20,490
Credit card, Percent change	2.00%
Other retail	$ 460	524
Other retail, Percent change	(12.20%)
Total loans, excluding covered loans	$ 29,448	28,549
Total loans, excluding covered loans, Percent change	3.10%
Total loans	$ 29,448	28,549
Total loans, Percent change	3.10%
Goodwill, Percent change	0.10%
Other intangible assets, Percent change	(18.70%)
Assets, Percent change	1.80%
Noninterest-bearing deposits, Percent change	9.00%
Savings products, Percent change	5.20%
Total deposits, Percent change	8.70%
Total U.S. Bancorp shareholders' equity, Percent change	(1.90%)
Goodwill	$ 2,465	2,463
Other intangible assets	401	493
Assets	35,020	34,389
Noninterest-bearing deposits	1,037	951
Savings products	102	97
Total deposits	1,139	1,048
Total U.S. Bancorp shareholders' equity	6,269	6,389
Treasury and Corporate Support [Member]
Condensed Income Statement
Net interest income (taxable-equivalent basis)	$ 1,918	2,060
Net interest income (taxable-equivalent basis), Percent change	(6.90%)
Noninterest income	$ 950	981
Noninterest income, Percent change	(3.20%)
Securities gains (losses), net	$ 60	20
Securities gains (losses), net, Percent change	0.00%
Total net revenue	$ 2,928	3,061
Total net revenue, Percent change	(4.30%)
Noninterest expense, Percent change	93.70%
Total noninterest expense, Percent change	93.70%
Income before provision and income taxes, Percent change	(44.30%)
Income before income taxes, Percent change	(42.90%)
Net income, Percent change	4.30%
Net (income) loss attributable to noncontrolling interests, Percent change	8.30%
Net income attributable to U.S. Bancorp, Percent change	4.50%
Noninterest expense	$ 1,718	887
Total noninterest expense	1,718	887
Income before provision and income taxes	1,210	2,174
Provision for credit losses	(31)	1
Income before income taxes	1,241	2,173
Income taxes and taxable-equivalent adjustment	(890)	130
Net income	2,131	2,043
Net (income) loss attributable to noncontrolling interests	(22)	(24)
Net income attributable to U.S. Bancorp	2,109	2,019
Average Balance Sheet
Commercial	$ 687	384
Commercial, Percent change	78.90%
Commercial real estate	$ 2,676	3,103
Commercial real estate, Percent change	(13.80%)
Total loans, excluding covered loans	$ 3,363	3,487
Total loans, excluding covered loans, Percent change	(3.60%)
Covered loans	$ 5	30
Covered loans, Percent change	(83.30%)
Total loans	$ 3,368	3,517
Total loans, Percent change	(4.20%)
Assets, Percent change	5.40%
Noninterest-bearing deposits, Percent change	0.60%
Interest checking, Percent change	7.50%
Savings products, Percent change	(6.90%)
Time deposits, Percent change	(59.70%)
Total deposits, Percent change	(24.70%)
Total U.S. Bancorp shareholders' equity, Percent change	0.60%
Assets	$ 143,553	136,237
Noninterest-bearing deposits	2,093	2,081
Interest checking	43	40
Savings products	457	491
Time deposits	717	1,781
Total deposits	3,310	4,393
Total U.S. Bancorp shareholders' equity	$ 18,484	$ 18,380

Significant Accounting Polici63

Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoanSegmentBusiness
Significant Accounting Policies Additional Information [Line Items]
Number of reportable operating segments | Segment	5
Wealth Management and Investment Services number of businesses | Business	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 in entities accounted for using equity method	20.00%
Maximum ownership percentage for significant influence in entities 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 | Segment	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 plan assets unrealized difference between actual experience and expected returns amortization period	15 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Significant Accounting Policies Additional Information [Line Items]
Useful life	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Significant Accounting Policies Additional Information [Line Items]
Useful life	20 years
Building [Member] | Maximum [Member]
Significant Accounting Policies Additional Information [Line Items]
Useful life	40 years
Residential Mortgages [Member] | 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
Residential Mortgages [Member] | 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 | $	$ 5,000,000
Consumer Lending Segment [Member]
Significant Accounting Policies Additional Information [Line Items]
Number of classes of loans	3
Covered Loan Segment [Member]
Significant Accounting Policies Additional Information [Line Items]
Number of classes of loans	1

Restrictions on Cash and Due 64

Restrictions on Cash and Due from Banks - Additional Information (Detail) - USD ($) $ in Billions	Dec. 31, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Minimum average reserve balances required by banking regulators	$ 3.1	$ 3
Balances held at the federal reserve and other financial institutions	$ 2.4	$ 2.9

Investment Securities - Inves65

Investment Securities - Investment Securities Held-to-Maturity (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	$ 44,362	$ 42,991
Held-to-maturity securities, Unrealized Gains	60	106
Held-to-maturity securities, Unrealized Losses Other	(699)	(662)
Held-to-maturity securities, Fair Value	43,723	42,435
U.S. Treasury and Agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	5,181	5,246
Held-to-maturity securities, Unrealized Gains	5	12
Held-to-maturity securities, Unrealized Losses Other	(120)	(132)
Held-to-maturity securities, Fair Value	5,066	5,126
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	39,150	37,706
Held-to-maturity securities, Unrealized Gains	48	85
Held-to-maturity securities, Unrealized Losses Other	(579)	(529)
Held-to-maturity securities, Fair Value	38,619	37,262
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
Held-to-maturity securities, Fair Value		1
Asset-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	6
Held-to-maturity securities, Fair Value	12
Asset-Backed Securities [Member] | Collateralized Loan Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Unrealized Gains	4	5
Held-to-maturity securities, Fair Value	4	5
Asset-Backed Securities [Member] | Asset-Backed Securities Other [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	6	8
Held-to-maturity securities, Unrealized Gains	2	3
Held-to-maturity securities, Fair Value	8	11
Obligations of State and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	6	6
Held-to-maturity securities, Unrealized Gains	1	1
Held-to-maturity securities, Fair Value	7	7
Obligations of Foreign Governments [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	7	9
Held-to-maturity securities, Fair Value	7	9
Other Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, Amortized Cost	12	15
Held-to-maturity securities, Unrealized Losses Other		(1)
Held-to-maturity securities, Fair Value	$ 12	$ 14

Investment Securities - Inves66

Investment Securities - Investment Securities Available-for-Sale (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		$ 68,717	$ 66,985
Available-for-sale securities, Unrealized Gains		308	334
Available-for-sale securities, Unrealized Losses Other-than-Temporary			(6)
Available-for-sale securities, Unrealized Losses Other		(888)	(1,029)
Available-for-sale securities, Fair Value	[1]	68,137	66,284
U.S. Treasury and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		23,586	17,314
Available-for-sale securities, Unrealized Gains		3	11
Available-for-sale securities, Unrealized Losses Other		(288)	(198)
Available-for-sale securities, Fair Value		23,301	17,127
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		38,450	43,558
Available-for-sale securities, Unrealized Gains		152	225
Available-for-sale securities, Unrealized Losses Other		(571)	(645)
Available-for-sale securities, Fair Value		38,031	43,138
Mortgage-Backed Securities Residential [Member] | Non-Agency Prime [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost			240
Available-for-sale securities, Unrealized Gains			6
Available-for-sale securities, Unrealized Losses Other-than-Temporary			(3)
Available-for-sale securities, Unrealized Losses Other			(1)
Available-for-sale securities, Fair Value			242
Mortgage-Backed Securities Residential [Member] | Non-Agency Non-Prime [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost			178
Available-for-sale securities, Unrealized Gains			20
Available-for-sale securities, Unrealized Losses Other-than-Temporary			(3)
Available-for-sale securities, Fair Value			195
Commercial [Member] | Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		6	15
Available-for-sale securities, Fair Value		6	15
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		413
Available-for-sale securities, Fair Value		419
Asset-Backed Securities [Member] | Asset-Backed Securities Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		413	475
Available-for-sale securities, Unrealized Gains		6	8
Available-for-sale securities, Fair Value		419	483
Obligations of State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		6,240	5,167
Available-for-sale securities, Unrealized Gains		147	55
Available-for-sale securities, Unrealized Losses Other		(29)	(183)
Available-for-sale securities, Fair Value		6,358	5,039
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost			11
Available-for-sale securities, Unrealized Losses Other			(2)
Available-for-sale securities, Fair Value			9
Other Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost		22	27
Available-for-sale securities, Unrealized Gains			9
Available-for-sale securities, Fair Value		$ 22	$ 36
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Investment Securities - Inves67

Investment Securities - Investment Securities Available-for-Sale (Parenthetical) (Detail)	Dec. 31, 2017CreditScore
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 - Additio

Investment Securities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Weighted-average maturity of available-for-sale investment securities	5 years 1 month 6 days	5 years 1 month 6 days
Weighted-average yields of available-for-sale investment securities	2.25%	2.06%
Weighted-average maturity of held-to-maturity investment securities	4 years 8 months 12 days	4 years 7 months 6 days
Weighted-average yields of held-to-maturity investment securities	2.14%	1.93%
Fair value of securities pledged	$ 12,800	$ 11,300
Fair value of securities pledged as collateral where counterparty has right to repledge or resell	$ 689	$ 755

Investment Securities - Amount

Investment Securities - Amount of Interest Income from Taxable and Non-Taxable Investment Securities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Income, Securities, Operating, by Taxable Status [Abstract]
Taxable	$ 2,043	$ 1,878	$ 1,778
Non-taxable	189	200	223
Total interest income from investment securities	$ 2,232	$ 2,078	$ 2,001

Investment Securities - Amoun70

Investment Securities - Amount of Gross Gains and Losses Realized through Sales of Available-for-Sale Investment Securities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments [Abstract]
Realized gains	$ 75	$ 93	$ 7
Realized losses	(18)	(66)	(6)
Net realized gains (losses)	57	27	$ 1
Income tax (benefit) on net realized gains (losses)	$ 22	$ 10

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses and Fair Value of Company's Investment Securities (Detail) $ in Millions	Dec. 31, 2017USD ($)
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	$ 19,593
Unrealized Losses Less Than 12 Months	(170)
Fair Value 12 Months or Greater	17,918
Unrealized Losses 12 Months or Greater	(529)
Fair Value Total	37,511
Unrealized Losses Total	(699)
Fair Value Less Than 12 Months	23,194
Unrealized Losses Less Than 12 Months	(204)
Fair Value 12 Months or Greater	31,073
Unrealized Losses 12 Months or Greater	(684)
Fair Value Total	54,267
Unrealized Losses Total	(888)
U.S. Treasury and Agencies [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	2,109
Unrealized Losses Less Than 12 Months	(18)
Fair Value 12 Months or Greater	2,596
Unrealized Losses 12 Months or Greater	(102)
Fair Value Total	4,705
Unrealized Losses Total	(120)
Fair Value Less Than 12 Months	13,911
Unrealized Losses Less Than 12 Months	(128)
Fair Value 12 Months or Greater	9,124
Unrealized Losses 12 Months or Greater	(160)
Fair Value Total	23,035
Unrealized Losses Total	(288)
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	17,484
Unrealized Losses Less Than 12 Months	(152)
Fair Value 12 Months or Greater	15,308
Unrealized Losses 12 Months or Greater	(427)
Fair Value Total	32,792
Unrealized Losses Total	(579)
Fair Value Less Than 12 Months	9,132
Unrealized Losses Less Than 12 Months	(75)
Fair Value 12 Months or Greater	20,635
Unrealized Losses 12 Months or Greater	(496)
Fair Value Total	29,767
Unrealized Losses Total	(571)
Obligations of State and Political Subdivisions [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value Less Than 12 Months	151
Unrealized Losses Less Than 12 Months	(1)
Fair Value 12 Months or Greater	1,313
Unrealized Losses 12 Months or Greater	(28)
Fair Value Total	1,464
Unrealized Losses Total	(29)
Other Investment [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	1
Fair Value Total	1
Asset-Backed Securities [Member] | Asset-Backed Securities Other [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	2
Fair Value Total	2
Other Debt Securities [Member]
Continuous Gross Unrealized Losses And Fair Value [Abstract]
Fair Value 12 Months or Greater	12
Fair Value Total	$ 12

Loans and Allowance for Credi72

Loans and Allowance for Credit Losses - Composition of Loan Portfolio (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	$ 277,311	$ 269,371
Total loans	280,432	273,207
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	91,958	87,928
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	97,561	93,386
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	40,463	43,098
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	59,783	57,274
Other Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	57,324	53,864
Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	5,603	5,458
Commercial Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	29,367	31,592
Construction and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	11,096	11,506
Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	46,685	43,632
Home Equity Loans, First Liens [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	13,098	13,642
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	22,180	21,749
Retail Leasing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	7,988	6,316
Home Equity and Second Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	16,327	16,369
Revolving Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	3,183	3,282
Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	8,989	8,087
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	18,934	17,571
Student [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	1,903	2,239
Total Loans, Excluding Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, excluding covered loans	277,311	269,371
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 3,121	$ 3,836

Loans and Allowance for Credi73

Loans and Allowance for Credit Losses - Additional Information (Detail) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoan	Dec. 31, 2017USD ($)MortgageLoan	Dec. 31, 2016USD ($)
Loans and Allowance for Credit Losses [Line Items]
Loans pledged at the Federal Home Loan Bank	$ 83,300	$ 83,300	$ 84,500
Loans pledged at the Federal Reserve Bank	68,000	68,000	66,500
Unearned interest and deferred fees and costs on originated loans	830	830	672
Foreclosed residential real estate property included in other real estate owned	156	156	201
Foreclosed residential real estate property included in other real estate owned excluding covered assets	135	135	175
Foreclosed residential real estate related to mortgage loans whose payments are insured by the Federal Housing Administration or guaranteed by the United States Department of Veterans Affairs	267	267	373
Residential mortgage loans secured by residential real estate in process of foreclosure	1,700	$ 1,700	2,100
Number 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 | MortgageLoan		1,768
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		$ 206
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 GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the United States Department of Veterans Affairs	$ 1,300	$ 1,300	$ 1,600
Home Equity and Second Mortgages [Member]
Loans and Allowance for Credit Losses [Line Items]
Number of loans in trial period | SecurityLoan	25
Outstanding balance of loans in trial period	$ 2
Estimated post-modification balance of loans in trial period	$ 2
Residential Mortgages [Member]
Loans and Allowance for Credit Losses [Line Items]
Number of loans in trial period | SecurityLoan	37
Outstanding balance of loans in trial period	$ 5
Estimated post-modification balance of loans in trial period	$ 5
Government National Mortgage Association [Member]
Loans and Allowance for Credit Losses [Line Items]
Number of loans in trial period | SecurityLoan	983
Outstanding balance of loans in trial period	$ 125
Estimated post-modification balance of loans in trial period	$ 125

Loans and Allowance for Credi74

Loans and Allowance for Credit Losses - Changes in Accretable Balance for Purchased Impaired Loans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deteriorated Loans Transferred in [Abstract]
Balance at beginning of period	$ 698	$ 957	$ 1,309
Accretion	(386)	(392)	(382)
Disposals	(83)	(110)	(132)
Reclassifications from nonaccretable difference	129	244	163
Other	(8)	(1)	(1)
Balance at end of period	$ 350	$ 698	$ 957

Loans and Allowance for Credi75

Loans and Allowance for Credit Losses - Activity in Allowance for Credit Losses by Portfolio Class (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 4,357	$ 4,306	$ 4,375
Provision for credit losses	1,390	1,324	1,132
Loans charged-off	1,751	1,615	1,516
Less recoveries of loans charged-off	(421)	(346)	(344)
Net loans charged-off	1,330	1,269	1,172
Other changes		(4)	(29)
Balance at end of period	4,417	4,357	4,306
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	1,450	1,287	1,146
Provision for credit losses	186	488	361
Loans charged-off	414	417	314
Less recoveries of loans charged-off	(150)	(92)	(95)
Net loans charged-off	264	325	219
Other changes			(1)
Balance at end of period	1,372	1,450	1,287
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	812	724	726
Provision for credit losses	19	75	(30)
Loans charged-off	30	22	22
Less recoveries of loans charged-off	(30)	(35)	(50)
Net loans charged-off		(13)	(28)
Balance at end of period	831	812	724
Residential Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	510	631	787
Provision for credit losses	(24)	(61)	(47)
Loans charged-off	65	85	135
Less recoveries of loans charged-off	(28)	(25)	(26)
Net loans charged-off	37	60	109
Balance at end of period	449	510	631
Other Retail [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	617	743	771
Provision for credit losses	304	95	193
Loans charged-off	355	332	319
Less recoveries of loans charged-off	(112)	(111)	(98)
Net loans charged-off	243	221	221
Balance at end of period	678	617	743
Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	934	883	880
Provision for credit losses	908	728	654
Loans charged-off	887	759	726
Less recoveries of loans charged-off	(101)	(83)	(75)
Net loans charged-off	786	676	651
Other changes		(1)
Balance at end of period	1,056	934	883
Total Loans, Excluding Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	4,323	4,268	4,310
Provision for credit losses	1,393	1,325	1,131
Loans charged-off	1,751	1,615	1,516
Less recoveries of loans charged-off	(421)	(346)	(344)
Net loans charged-off	1,330	1,269	1,172
Other changes		(1)	(1)
Balance at end of period	4,386	4,323	4,268
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	34	38	65
Provision for credit losses	(3)	(1)	1
Other changes		(3)	(28)
Balance at end of period	$ 31	$ 34	$ 38

Loans and Allowance for Credi76

Loans and Allowance for Credit Losses - Additional Detail of Allowance for Credit Losses and Related Loan Balances by Portfolio Class (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance Balance at End of Period
Loans individually evaluated for impairment	$ 27	$ 54
TDRs collectively evaluated for impairment	237	282
Other loans collectively evaluated for impairment	4,118	3,982
Loans acquired with deteriorated credit quality	35	39
Total allowance for credit losses	4,417	4,357	$ 4,306	$ 4,375
Loan Balance at End of Period
Loans individually evaluated for impairment	408	693
TDRs collectively evaluated for impairment	4,269	4,399
Other loans collectively evaluated for impairment	273,669	265,728
Loans acquired with deteriorated credit quality	2,086	2,387
Total loans	277,311	269,371
Total loans	280,432	273,207
Commercial [Member]
Allowance Balance at End of Period
Loans individually evaluated for impairment	23	50
TDRs collectively evaluated for impairment	14	12
Other loans collectively evaluated for impairment	1,335	1,388
Total allowance for credit losses	1,372	1,450	1,287	1,146
Loan Balance at End of Period
Loans individually evaluated for impairment	337	623
TDRs collectively evaluated for impairment	148	145
Other loans collectively evaluated for impairment	97,076	92,611
Loans acquired with deteriorated credit quality		7
Total loans	97,561	93,386
Commercial Real Estate [Member]
Allowance Balance at End of Period
Loans individually evaluated for impairment	4	4
TDRs collectively evaluated for impairment	4	4
Other loans collectively evaluated for impairment	818	798
Loans acquired with deteriorated credit quality	5	6
Total allowance for credit losses	831	812	724	726
Loan Balance at End of Period
Loans individually evaluated for impairment	71	70
TDRs collectively evaluated for impairment	145	146
Other loans collectively evaluated for impairment	40,174	42,751
Loans acquired with deteriorated credit quality	73	131
Total loans	40,463	43,098
Residential Mortgages [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	139	180
Other loans collectively evaluated for impairment	310	330
Total allowance for credit losses	449	510	631	787
Loan Balance at End of Period
TDRs collectively evaluated for impairment	3,524	3,678
Other loans collectively evaluated for impairment	56,258	53,595
Loans acquired with deteriorated credit quality	1	1
Total loans	59,783	57,274
Other Retail [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	19	20
Other loans collectively evaluated for impairment	659	597
Total allowance for credit losses	678	617	743	771
Loan Balance at End of Period
TDRs collectively evaluated for impairment	186	173
Other loans collectively evaluated for impairment	57,138	53,691
Total loans	57,324	53,864
Credit Card [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	60	65
Other loans collectively evaluated for impairment	996	869
Total allowance for credit losses	1,056	934	883	880
Loan Balance at End of Period
TDRs collectively evaluated for impairment	230	222
Other loans collectively evaluated for impairment	21,950	21,527
Total loans	22,180	21,749
Total Loans, Excluding Covered Loans [Member]
Allowance Balance at End of Period
Loans individually evaluated for impairment	27	54
TDRs collectively evaluated for impairment	236	281
Other loans collectively evaluated for impairment	4,118	3,982
Loans acquired with deteriorated credit quality	5	6
Total allowance for credit losses	4,386	4,323	4,268	4,310
Loan Balance at End of Period
Loans individually evaluated for impairment	408	693
TDRs collectively evaluated for impairment	4,233	4,364
Other loans collectively evaluated for impairment	272,596	264,175
Loans acquired with deteriorated credit quality	74	139
Total loans	277,311	269,371
Covered Loans [Member]
Allowance Balance at End of Period
TDRs collectively evaluated for impairment	1	1
Loans acquired with deteriorated credit quality	30	33
Total allowance for credit losses	31	34	$ 38	$ 65
Loan Balance at End of Period
TDRs collectively evaluated for impairment	36	35
Other loans collectively evaluated for impairment	1,073	1,553
Loans acquired with deteriorated credit quality	2,012	2,248
Total loans	$ 3,121	$ 3,836

Loans and Allowance for Credi77

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Class, Including Delinquency Status of those that Continue to Accrue Interest and are Nonperforming (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 277,492	$ 269,994
Accruing 30-89 Days Past Due	1,212	1,081
Accruing 90 Days or More Past Due	720	764	$ 831	$ 945	$ 1,189
Nonperforming	1,008	1,368	1,192	1,466	1,603
Total loans, excluding covered loans	277,311	269,371
Total loans	280,432	273,207
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	97,005	92,588
Accruing 30-89 Days Past Due	250	263
Accruing 90 Days or More Past Due	57	52
Nonperforming	249	483	174	112	134
Total loans, excluding covered loans	97,561	93,386
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	40,279	42,922
Accruing 30-89 Days Past Due	36	44
Accruing 90 Days or More Past Due	6	8
Nonperforming	142	124	127	259	303
Total loans, excluding covered loans	40,463	43,098
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	59,013	56,372
Accruing 30-89 Days Past Due	198	151
Accruing 90 Days or More Past Due	130	156
Nonperforming	442	595	712	864	770
Total loans, excluding covered loans	59,783	57,274
Other Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	56,685	53,340
Accruing 30-89 Days Past Due	376	284
Accruing 90 Days or More Past Due	95	83
Nonperforming	168	157	162	187	191
Total loans, excluding covered loans	57,324	53,864
Credit Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	21,593	21,209
Accruing 30-89 Days Past Due	302	284
Accruing 90 Days or More Past Due	284	253
Nonperforming	1	3	9	30	78
Total loans, excluding covered loans	22,180	21,749
Total Loans, Excluding Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	274,575	266,431
Accruing 30-89 Days Past Due	1,162	1,026
Accruing 90 Days or More Past Due	572	552
Nonperforming	1,002	1,362	1,184	1,452	1,476
Total loans, excluding covered loans	277,311	269,371
Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,917	3,563
Accruing 30-89 Days Past Due	50	55
Accruing 90 Days or More Past Due	148	212
Nonperforming	6	6	$ 8	$ 14	$ 127
Total loans	$ 3,121	$ 3,836

Loans and Allowance for Credi78

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Class, Including Delinquency Status of those that Continue to Accrue Interest and are Nonperforming (Parenthetical) (Detail) - Government National Mortgage Association [Member] - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
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 United States Department of Veterans Affairs, were classified as current	$ 385	$ 273
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 United States Department of Veterans Affairs, were classified as current	$ 1,900	$ 2,500

Loans and Allowance for Credi79

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Class and Company's Internal Credit Quality Rating (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	$ 277,311	$ 269,371
Total loans	280,432	273,207
Total outstanding commitments	591,201	573,253
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	275,576	266,665
Total outstanding commitments	584,072	562,704
Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,800	2,400
Total outstanding commitments	3,142	4,920
Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,056	4,142
Total outstanding commitments	3,987	5,629
Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,856	6,542
Total outstanding commitments	7,129	10,549
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	97,561	93,386
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	95,297	89,739
Commercial [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,130	1,721
Commercial [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,134	1,926
Commercial [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	2,264	3,647
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	40,463	43,098
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	39,162	41,634
Commercial Real Estate [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	648	663
Commercial Real Estate [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	653	801
Commercial Real Estate [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,301	1,464
Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	59,783	57,274
Residential Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	59,141	56,457
Residential Mortgages [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	16	10
Residential Mortgages [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	626	807
Residential Mortgages [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	642	817
Other Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	57,324	53,864
Other Retail [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	57,009	53,576
Other Retail [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	6	6
Other Retail [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	309	282
Other Retail [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	315	288
Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	22,180	21,749
Credit Card [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	21,895	21,493
Credit Card [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	285	256
Credit Card [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	285	256
Total Loans, Excluding Covered Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	277,311	269,371
Total Loans, Excluding Covered Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	272,504	262,899
Total Loans, Excluding Covered Loans [Member] | Special Mention Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	1,800	2,400
Total Loans, Excluding Covered Loans [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	3,007	4,072
Total Loans, Excluding Covered Loans [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, excluding covered loans	4,807	6,472
Covered Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,121	3,836
Covered Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,072	3,766
Covered Loans [Member] | Classified Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	49	70
Covered Loans [Member] | Total Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 49	$ 70

Loans and Allowance for Credi80

Loans and Allowance for Credit Losses - Summary of Loans by Portfolio Class and Company's Internal Credit Quality Rating (Parenthetical) (Detail) - Government National Mortgage Association [Member] - USD ($) $ in Billions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Restructured GNMA loans whose repayments are insured by the Federal Housing Administration or guaranteed by the United States Department of Veterans Affairs, were classified with a pass rating	$ 1.7	$ 1.6
GNMA loans 90 days or more past due whose repayments are insured by the Federal Housing Administration or guaranteed by the United States Department of Veterans Affairs, were classified with a pass rating	$ 1.9	$ 2.5

Loans and Allowance for Credi81

Loans and Allowance for Credit Losses - Summary of Impaired Loans, which Include Nonaccrual and TDR Loans, by Portfolio Class (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	$ 5,027	$ 5,529
Unpaid Principal Balance	6,205	7,202
Valuation Allowance	279	346
Commitments to Lend Additional Funds	204	289
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	550	849
Unpaid Principal Balance	915	1,364
Valuation Allowance	44	68
Commitments to Lend Additional Funds	199	284
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	280	293
Unpaid Principal Balance	596	697
Valuation Allowance	11	10
Residential Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	1,946	2,274
Unpaid Principal Balance	2,339	2,847
Valuation Allowance	116	153
Commitments to Lend Additional Funds	1
Other Retail [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	302	281
Unpaid Principal Balance	400	456
Valuation Allowance	22	22
Commitments to Lend Additional Funds	4	4
Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	230	222
Unpaid Principal Balance	230	222
Valuation Allowance	60	64
Total Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	3,308	3,919
Unpaid Principal Balance	4,480	5,586
Valuation Allowance	253	317
Commitments to Lend Additional Funds	204	288
Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	38	36
Unpaid Principal Balance	44	42
Valuation Allowance	1	1
Commitments to Lend Additional Funds		1
Government National Mortgage Association [Member]
Financing Receivable, Impaired [Line Items]
Period-end Recorded Investment	1,681	1,574
Unpaid Principal Balance	1,681	1,574
Valuation Allowance	$ 25	$ 28

Loans and Allowance for Credi82

Loans and Allowance for Credit Losses - Summary of Impaired Loans, which Include Nonaccrual and TDR Loans, by Portfolio Class (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Loan and Lease Receivables, Impaired [Abstract]
Interest income recognized on impaired loans	$ 204
Interest income that would have been recognized on impaired loans at original contractual loan terms	$ 265

Loans and Allowance for Credi83

Loans and Allowance for Credit Losses - Impaired Loans Average Recorded Investment and Interest Income Recognized (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 5,316	$ 5,710	$ 6,160
Interest Income Recognized	204	237	274
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	683	799	383
Interest Income Recognized	7	9	13
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	273	324	433
Interest Income Recognized	11	15	16
Residential Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,135	2,422	2,666
Interest Income Recognized	103	124	131
Other Retail [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	287	293	336
Interest Income Recognized	14	13	14
Credit Card [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	229	214	221
Interest Income Recognized	3	4	4
Total Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	3,607	4,052	4,039
Interest Income Recognized	138	165	178
Covered Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	37	38	42
Interest Income Recognized	1	1	1
Government National Mortgage Association [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,672	1,620	2,079
Interest Income Recognized	$ 65	$ 71	$ 95

Loans and Allowance for Credi84

Loans and Allowance for Credit Losses - Summary of Loans Modified as TDRs (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoan	Dec. 31, 2016USD ($)SecurityLoan	Dec. 31, 2015USD ($)SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	47,984	48,958	41,312
Pre-Modification Outstanding Loan Balance	$ 1,675	$ 2,743	$ 1,779
Post-Modification Outstanding Loan Balance	$ 1,593	$ 2,600	$ 1,785
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,758	2,352	1,607
Pre-Modification Outstanding Loan Balance	$ 380	$ 844	$ 385
Post-Modification Outstanding Loan Balance	$ 328	$ 699	$ 396
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	128	102	108
Pre-Modification Outstanding Loan Balance	$ 82	$ 259	$ 78
Post-Modification Outstanding Loan Balance	$ 78	$ 256	$ 76
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	800	1,576	2,080
Pre-Modification Outstanding Loan Balance	$ 90	$ 168	$ 260
Post-Modification Outstanding Loan Balance	$ 88	$ 178	$ 258
Other Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	3,881	2,235	2,530
Pre-Modification Outstanding Loan Balance	$ 79	$ 41	$ 54
Post-Modification Outstanding Loan Balance	$ 68	$ 40	$ 54
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	33,615	31,394	26,772
Pre-Modification Outstanding Loan Balance	$ 161	$ 151	$ 133
Post-Modification Outstanding Loan Balance	$ 162	$ 153	$ 134
Total Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	41,182	37,659	33,097
Pre-Modification Outstanding Loan Balance	$ 792	$ 1,463	$ 910
Post-Modification Outstanding Loan Balance	$ 724	$ 1,326	$ 918
Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	11	39	16
Pre-Modification Outstanding Loan Balance	$ 2	$ 6	$ 5
Post-Modification Outstanding Loan Balance	$ 2	$ 7	$ 5
Government National Mortgage Association [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	6,791	11,260	8,199
Pre-Modification Outstanding Loan Balance	$ 881	$ 1,274	$ 864
Post-Modification Outstanding Loan Balance	$ 867	$ 1,267	$ 862

Loans and Allowance for Credi85

Loans and Allowance for Credit Losses - Summary of Loans Modified as TDRs in the Past Twelve Months that have Subsequently Defaulted (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoan	Dec. 31, 2016USD ($)SecurityLoan	Dec. 31, 2015USD ($)SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	11,294	8,157	8,310
Amount Defaulted | $	$ 321	$ 118	$ 182
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	724	531	494
Amount Defaulted | $	$ 53	$ 24	$ 21
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	36	27	18
Amount Defaulted | $	$ 9	$ 12	$ 8
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	374	132	273
Amount Defaulted | $	$ 41	$ 17	$ 36
Other Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	415	434	636
Amount Defaulted | $	$ 5	$ 9	$ 12
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	8,372	6,827	6,286
Amount Defaulted | $	$ 36	$ 30	$ 29
Total Loans, Excluding GNMA and Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	9,921	7,951	7,707
Amount Defaulted | $	$ 144	$ 92	$ 106
Covered Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	4	4	5
Amount Defaulted | $		$ 1	$ 1
Government National Mortgage Association [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1,369	202	598
Amount Defaulted | $	$ 177	$ 25	$ 75

Loans and Allowance for Credi86

Loans and Allowance for Credit Losses - Carrying Amount of Covered Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Covered Assets [Line Items]
Purchased Impaired Loans	$ 2,012	$ 2,248
Purchased Nonimpaired Loans	551	784
Other	579	830
Covered loans	3,121	3,836
Total Covered Assets	3,142	3,862
Residential Mortgages [Member]
Covered Assets [Line Items]
Purchased Impaired Loans	2,012	2,248
Purchased Nonimpaired Loans	400	506
Covered loans	2,412	2,754
Other Retail [Member]
Covered Assets [Line Items]
Purchased Nonimpaired Loans	151	278
Covered loans	151	278
Losses Reimbursable by FDIC [Member]
Covered Assets [Line Items]
Other	320	381
Covered loans	320	381
Unamortized Changes in FDIC Asset [Member]
Covered Assets [Line Items]
Other	238	423
Covered loans	238	423
Covered Loans [Member]
Covered Assets [Line Items]
Purchased Impaired Loans	2,012	2,248
Purchased Nonimpaired Loans	551	784
Other	558	804
Covered loans	3,121	3,836
Foreclosed Real Estate [Member]
Covered Assets [Line Items]
Other	21	26
Total Covered Assets	$ 21	$ 26

Leases - Components of Net Inve

Leases - Components of Net Investment in Sales-Type and Direct Financing Leases (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Capital Leases, Net Investment in Direct Financing and Sales Type Leases [Abstract]
Aggregate future minimum lease payments to be received	$ 12,709	$ 11,257
Unguaranteed residual values accruing to the lessor's benefit	1,731	1,175
Unearned income	(1,205)	(1,023)
Initial direct costs	274	237
Total net investment in sales-type and direct financing leases	$ 13,509	$ 11,646

Leases - Components of Net In88

Leases - Components of Net Investment in Sales-Type and Direct Financing Leases (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Capital Leases, Net Investment in Direct Financing and Sales Type Leases [Abstract]
Accumulated allowance for uncollectible minimum lease payments	$ 94	$ 83

Leases - Minimum Future Lease P

Leases - Minimum Future Lease Payments to be Received from Sales-Type and Direct Financing Leases (Detail) $ in Millions	Dec. 31, 2017USD ($)
Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract]
2,018	$ 3,709
2,019	3,643
2,020	3,239
2,021	1,180
2,022	410
Thereafter	$ 528

Accounting for Transfers and 90

Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	56,000,000	40,000,000
Financial Support Waived Fees [Member]
Variable Interest Entity [Line Items]
Financial or other support to money market funds	23,000,000	45,000,000	$ 112,000,000
Private Investment Funds and Partnerships [Member]
Variable Interest Entity [Line Items]
Investment carrying amount	30,000,000	28,000,000
Maximum exposure to loss	51,000,000	50,000,000
Community Development and Tax Advantaged Investments [Member]
Variable Interest Entity [Line Items]
Federal and state income tax credits recognized in tax expense	711,000,000	698,000,000	733,000,000
Expense related to investments	741,000,000	672,000,000	698,000,000
Investment tax credits	1,500,000,000	1,400,000,000	1,200,000,000
Expenses related to investments recognized in tax expense	317,000,000	251,000,000	$ 261,000,000
Investment carrying amount	5,660,000,000	5,009,000,000
Maximum exposure to loss	12,120,000,000	10,373,000,000
Assets related to consolidated VIEs	3,500,000,000	3,500,000,000
Liabilities related to consolidated VIEs	2,500,000,000	2,600,000,000
Conduit [Member]
Variable Interest Entity [Line Items]
Assets related to consolidated VIEs	18,000,000	24,000,000
Tender Option Bond Program [Member]
Variable Interest Entity [Line Items]
Assets related to consolidated VIEs	2,500,000,000	1,100,000,000
Liabilities related to consolidated VIEs	$ 2,300,000,000	$ 1,100,000,000

Accounting for Transfers and 91

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 ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Investment carrying amount	$ 5,660	$ 5,009
Unfunded capital and other commitments	2,770	2,477
Maximum exposure to loss	$ 12,120	$ 10,373

Premises and Equipment - Premis

Premises and Equipment - Premises and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	$ 7,061	$ 6,851
Less accumulated depreciation and amortization	(4,629)	(4,408)
Total Premises and Equipment	2,432	2,443
Land [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	520	516
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	3,425	3,383
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	2,951	2,798
Capitalized Building and Equipment Leases [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	130	125
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Gross Premises and Equipment	$ 35	$ 29

Mortgage Servicing Rights - Add

Mortgage Servicing Rights - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Transfers and Servicing of Financial Assets [Abstract]
Residential mortgage loans serviced for others including subserviced mortgages with no corresponding MSRs asset	$ 234,700	$ 232,600
Gain (Loss) on fair value changes of MSRs due to changes in valuation assumptions and derivatives used to economically hedge MSRs	15	7	$ 23
Loan servicing and ancillary fees	$ 746	$ 750	$ 728

Mortgage Servicing Rights - Cha

Mortgage Servicing Rights - Changes in Fair Value of Capitalized MSRs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Transfers and Servicing of Financial Assets [Abstract]
Balance at beginning of period	$ 2,591	$ 2,512	$ 2,338
Rights purchased	13	43	29
Rights capitalized	445	524	632
Changes in fair value of MSRs
Due to fluctuations in market interest rates	(23)	(55)	(58)
Due to revised assumptions or models	18	19	10
Other changes in fair value	(399)	(452)	(439)
Balance at end of period	$ 2,645	$ 2,591	$ 2,512

Mortgage Servicing Rights - Sen

Mortgage Servicing Rights - Sensitivity to Changes in Interest Rates of the Fair Value of MSRs Portfolio and Related Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
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	$ (520)	$ (476)
Net fair value 50 basis points	(231)	(209)
Net fair value 25 basis points	(109)	(98)
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	453	375
Net fair value 50 basis points	216	180
Net fair value 25 basis points	105	88
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	(67)	(101)
Net fair value 50 basis points	(15)	(29)
Net fair value 25 basis points	(4)	(10)
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	302	270
Net fair value 50 basis points	177	159
Net fair value 25 basis points	95	85
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	(336)	(314)
Net fair value 50 basis points	(184)	(165)
Net fair value 25 basis points	(96)	(84)
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	(34)	(44)
Net fair value 50 basis points	(7)	(6)
Net fair value 25 basis points	$ (1)	$ 1

Mortgage Servicing Rights - MSR

Mortgage Servicing Rights - MSRs and Related Characteristics by Portfolio (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)BasisPointMultiple	Dec. 31, 2016USD ($)BasisPointMultiple	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Servicing Assets at Fair Value [Line Items]
Fair value	$ 2,645	$ 2,591	$ 2,512	$ 2,338
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	232,846	230,047
Fair value	$ 2,645	$ 2,591
Value (bps) | BasisPoint	114	113
Weighted-average servicing fees (bps) | BasisPoint	29	30
Multiple (value/servicing fees) | Multiple	3.86	3.77
Weighted-average note rate	4.08%	4.06%
Weighted-average age (in years)	4 years	3 years 8 months 12 days
Weighted-average expected prepayment (constant prepayment rate)	10.00%	10.00%
Weighted-average expected life (in years)	7 years	7 years
Weighted-average option adjusted spread	8.00%	8.00%
HFA [Member] | Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	$ 40,737	$ 34,746
Fair value	$ 450	$ 398
Value (bps) | BasisPoint	110	115
Weighted-average servicing fees (bps) | BasisPoint	35	36
Multiple (value/servicing fees) | Multiple	3.17	3.19
Weighted-average note rate	4.43%	4.37%
Weighted-average age (in years)	3 years	2 years 10 months 25 days
Weighted-average expected prepayment (constant prepayment rate)	9.80%	9.40%
Weighted-average expected life (in years)	7 years 8 months 12 days	8 years
Weighted-average option adjusted spread	9.90%	9.90%
Government Insured [Member] | Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	$ 36,756	$ 37,530
Fair value	$ 428	$ 422
Value (bps) | BasisPoint	116	112
Weighted-average servicing fees (bps) | BasisPoint	34	34
Multiple (value/servicing fees) | Multiple	3.38	3.29
Weighted-average note rate	3.92%	3.95%
Weighted-average age (in years)	4 years 3 months 19 days	3 years 9 months 18 days
Weighted-average expected prepayment (constant prepayment rate)	11.60%	11.30%
Weighted-average expected life (in years)	6 years 6 months	6 years 9 months 18 days
Weighted-average option adjusted spread	9.20%	9.20%
Conventional [Member] | Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Servicing portfolio	$ 155,353	$ 157,771
Fair value	$ 1,767	$ 1,771
Value (bps) | BasisPoint	114	112
Weighted-average servicing fees (bps) | BasisPoint	27	27
Multiple (value/servicing fees) | Multiple	4.24	4.15
Weighted-average note rate	4.02%	4.02%
Weighted-average age (in years)	4 years 2 months 12 days	3 years 9 months 18 days
Weighted-average expected prepayment (constant prepayment rate)	9.70%	9.80%
Weighted-average expected life (in years)	6 years 10 months 25 days	6 years 10 months 25 days
Weighted-average option adjusted spread	7.20%	7.20%

Intangible Assets - Intangible

Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 9,434	$ 9,344	$ 9,361	$ 9,389
Mortgage servicing rights	2,645	2,591	$ 2,512	$ 2,338
Total	$ 12,662	12,647
Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	$ 89	108
Core Deposit Benefits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	$ 131	161
Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	$ 45	59
Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization Method	SL/AC
Finite-Lived Intangible Assets	$ 318	$ 384
Straight line method [Member] | Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	7 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	7 years
Accelerated method [Member] | Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Life	4 years

Intangible Assets - Aggregate A

Intangible Assets - Aggregate Amortization Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 175	$ 179	$ 174
Merchant Processing Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	24	28	35
Core Deposit Benefits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	30	34	40
Trust Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	14	16	21
Other Identified Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 107	$ 101	$ 78

Intangible Assets - Estimated A

Intangible Assets - Estimated Amortization Expense (Detail) $ in Millions	Dec. 31, 2017USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	$ 148
2,019	119
2,020	93
2,021	71
2,022	$ 51

Intangible Assets - Changes in

Intangible Assets - Changes in Carrying Value of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 9,344	$ 9,361	$ 9,389
Goodwill acquired	62
Foreign exchange translation and other	28	(17)	(28)
Goodwill, Ending Balance	9,434	9,344	9,361
Corporate and Commercial Banking [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,647	1,647	1,648
Foreign exchange translation and other			(1)
Goodwill, Ending Balance	1,647	1,647	1,647
Consumer and Business Banking [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	3,681	3,681	3,680
Foreign exchange translation and other			1
Goodwill, Ending Balance	3,681	3,681	3,681
Wealth Management and Investment Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,566	1,567	1,570
Foreign exchange translation and other	3	(1)	(3)
Goodwill, Ending Balance	1,569	1,566	1,567
Payment Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,450	2,466	2,491
Goodwill acquired	62
Foreign exchange translation and other	25	(16)	(25)
Goodwill, Ending Balance	$ 2,537	$ 2,450	$ 2,466

Deposits - Composition of Depos

Deposits - Composition of Deposits (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Noninterest-bearing deposits		$ 87,557	$ 86,097
Interest-bearing deposits
Interest checking		74,520	66,298
Money market savings		107,973	109,947
Savings accounts		43,809	41,783
Time deposits		33,356	30,465
Total interest-bearing deposits	[1]	259,658	248,493
Total deposits		$ 347,215	$ 334,590
[1]	Includes time deposits greater than $250,000 balances of $6.8 billion and $3.0 billion at December 31, 2017 and 2016, respectively.

Deposits - Maturities of Time D

Deposits - Maturities of Time Deposits Outstanding (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
2,018	$ 27,158
2,019	2,712
2,020	1,570
2,021	1,226
2,022	685
Thereafter	5
Total	$ 33,356	$ 30,465

Short-Term Borrowings - Summary

Short-Term Borrowings - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Short-term borrowings	$ 16,651	$ 13,963	$ 27,877
Short-term borrowings, interest rate, at year end	1.31%	0.43%	0.27%
Short-term borrowings, average for the year	$ 15,022	$ 19,906	$ 27,960
Short-term borrowings, interest rate, average for the year	2.18%	1.34%	0.89%
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 252	$ 447	$ 647
Short-term borrowings, interest rate, at year end	0.77%	0.30%	0.23%
Short-term borrowings, average for the year	$ 528	$ 1,015	$ 1,169
Short-term borrowings, interest rate, average for the year	34.57%	17.17%	15.05%
Short-term borrowings, maximum month end balance	$ 600	$ 2,487	$ 1,868
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 803	$ 801	$ 1,092
Short-term borrowings, interest rate, at year end	0.61%	0.12%	0.02%
Short-term borrowings, average for the year	$ 917	$ 891	$ 973
Short-term borrowings, interest rate, average for the year	0.44%	0.18%	0.10%
Short-term borrowings, maximum month end balance	$ 927	$ 1,177	$ 1,124
Commercial Paper [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 8,303	$ 10,010	$ 22,022
Short-term borrowings, interest rate, at year end	0.68%	0.30%	0.21%
Short-term borrowings, average for the year	$ 8,236	$ 14,827	$ 21,892
Short-term borrowings, interest rate, average for the year	0.49%	0.26%	0.12%
Short-term borrowings, maximum month end balance	$ 9,950	$ 21,441	$ 23,101
Other Short-Term Borrowings [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 7,293	$ 2,705	$ 4,116
Short-term borrowings, interest rate, at year end	2.13%	1.00%	0.69%
Short-term borrowings, average for the year	$ 5,341	$ 3,173	$ 3,926
Short-term borrowings, interest rate, average for the year	1.90%	1.67%	1.13%
Short-term borrowings, maximum month end balance	$ 7,293	$ 6,771	$ 7,656

Short-Term Borrowings - Summ104

Short-Term Borrowings - Summary of Short-Term Borrowings (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Compensation expense included in federal funds purchased and short-term borrowings rates	$ 178	$ 171	$ 175

Long-Term Debt - Summary of Lon

Long-Term Debt - Summary of Long-term Debt (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt	$ 32,259	$ 33,323
Parent Company [Member]
Debt Instrument [Line Items]
Long-term debt	15,769	13,045
Parent Company [Member] | Other Debt Issuance Fees and Unrealized Gains and Losses and Deferred Amounts Relating to Derivative Instruments [Member]
Debt Instrument [Line Items]
Long-term debt	(29)	(4)
Subsidiaries [Member]
Debt Instrument [Line Items]
Long-term debt	16,490	20,278
Subsidiaries [Member] | Other Consolidated Community Development and Tax-Advantaged Investment Vies, Capitalized Lease Obligations, Debt Issuance Fees, and Unrealized Gains and Losses and Deferred Amounts Relating to Derivative Instruments [Member]
Debt Instrument [Line Items]
Long-term debt	$ 1,000	1,011
Fixed Rate [Member] | Parent Company [Member] | Medium-term Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year, start	Jan. 1, 2018
Debt Instrument Maturity Year, End	Dec. 31, 2027
Long-term debt	$ 11,299	8,800
Fixed Rate [Member] | Parent Company [Member] | Medium-term Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.85%
Fixed Rate [Member] | Parent Company [Member] | Medium-term Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.125%
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	Jan. 1, 2022
Debt Instrument Maturity Year, End	Dec. 31, 2022
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	Jan. 1, 2024
Debt Instrument Maturity Year, End	Dec. 31, 2024
Long-term debt	$ 1,000	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	Jan. 1, 2026
Debt Instrument Maturity Year, End	Dec. 31, 2026
Long-term debt	$ 199	199
Fixed Rate [Member] | Parent Company [Member] | Subordinated Notes Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.10%
Debt Instrument Maturity Year, start	Jan. 1, 2026
Debt Instrument Maturity Year, End	Dec. 31, 2026
Long-term debt	$ 1,000	1,000
Fixed Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year, start	Jan. 1, 2018
Debt Instrument Maturity Year, End	Dec. 31, 2026
Long-term debt	$ 208	10
Fixed Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.25%
Fixed Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.25%
Fixed Rate [Member] | Subsidiaries [Member] | Bank Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year, start	Jan. 1, 2019
Debt Instrument Maturity Year, End	Dec. 31, 2025
Long-term debt	$ 6,200	6,800
Fixed Rate [Member] | Subsidiaries [Member] | Bank Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.40%
Fixed Rate [Member] | Subsidiaries [Member] | Bank Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.80%
Floating Rate [Member] | Parent Company [Member] | Medium-term Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year, start	Jan. 1, 2018
Debt Instrument Maturity Year, End	Dec. 31, 2022
Long-term debt	$ 1,000	750
Floating Rate [Member] | Parent Company [Member] | Medium-term Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.767%
Floating Rate [Member] | Parent Company [Member] | Medium-term Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.005%
Floating Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year, start	Jan. 1, 2018
Debt Instrument Maturity Year, End	Dec. 31, 2026
Long-term debt	$ 5,272	8,559
Floating Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.557%
Floating Rate [Member] | Subsidiaries [Member] | Federal Home Loan Bank Advances [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.973%
Floating Rate [Member] | Subsidiaries [Member] | Bank Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Year, start	Jan. 1, 2019
Debt Instrument Maturity Year, End	Dec. 31, 2057
Long-term debt	$ 3,810	$ 3,898
Floating Rate [Member] | Subsidiaries [Member] | Bank Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.063%
Floating Rate [Member] | Subsidiaries [Member] | Bank Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.858%

Long-Term Debt - Summary of 106

Long-Term Debt - Summary of Long-term Debt (Parenthetical) (Detail)	Dec. 31, 2017
Medium-term Notes [Member]
Debt Instrument [Line Items]
Weighted-average interest rate	2.51%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Weighted-average interest rate	1.83%
Bank Notes [Member]
Debt Instrument [Line Items]
Weighted-average interest rate	1.86%

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($) $ in Billions	Dec. 31, 2017	Dec. 31, 2016
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	$ 87.7	$ 91.4

Long-Term Debt - Maturities of

Long-Term Debt - Maturities of Long-term Debt Outstanding (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
2,018	$ 2,572
2,019	8,001
2,020	3,047
2,021	2,215
2,022	4,074
Thereafter	12,350
Total	32,259	$ 33,323
Parent Company [Member]
Debt Instrument [Line Items]
2,018	1,499
2,019	1,497
2,021	2,196
2,022	3,790
Thereafter	6,787
Total	$ 15,769	$ 13,045

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2006
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	1,700,000,000	1,700,000,000
Number of common stock shares reserved for future issuance	59,000,000
Issuance costs of redeemed preferred stock	$ (10)
Remaining authorized share repurchase amount	$ 1,300
Preferred stock outstanding	186,510	189,910
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				Jul. 15, 2018
Preferred stock outstanding	20,000	20,000
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%
Preferred stock dividend rate variable percentage					4.468%
Redemption period of preferred stock					90 days
Preferred stock redemption date					Jan. 15, 2022
Preferred stock outstanding	44,000	44,000
Series G [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued					43,400
Liquidation preference per share					$ 25,000
Issuance costs of redeemed preferred stock	$ (10)
Preferred stock outstanding		43,400
Series A [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued						6,764	5,746
Liquidation preference per share						$ 100,000	$ 100,000
Preferred stock dividend rate fixed percentage						3.50%	3.50%
Preferred stock dividend rate variable percentage						1.02%	1.02%
Preferred stock outstanding	12,510	12,510
Series A [Member] | Noncontrolling Interests [Member]
Class of Stock [Line Items]
Liquidation preference per share		$ 100,000
Preferred stock dividend rate variable percentage		1.147%
Minority interest preferred stock, shares issued		5,000
Number of stock repurchased during period		500
Gain due to repurchase of preferred stock		$ 9
Preferred stock outstanding	4,500
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 outstanding	40,000	40,000
Series I [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued			30,000
Liquidation preference per share			$ 25,000
Preferred stock dividend rate fixed percentage			5.125%
Preferred stock dividend rate variable percentage			3.486%
Redemption period of preferred stock			90 days
Preferred stock redemption date			Jan. 15, 2021
Preferred stock outstanding	30,000	30,000
Series J [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued	40,000
Liquidation preference per share	$ 25,000
Preferred stock dividend rate fixed percentage	5.30%
Preferred stock dividend rate variable percentage	2.914%
Redemption period of preferred stock	90 days
Preferred stock redemption date	Apr. 15, 2027
Preferred stock outstanding	40,000

Shareholders' Equity - Number o

Shareholders' Equity - Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Shares Issued and Outstanding	186,510	189,910
Liquidation Preference	$ 5,601	$ 5,686
Discount	182	185
Carrying Amount	$ 5,419	$ 5,501
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
Liquidation Preference		$ 1,085
Discount		10
Carrying Amount		$ 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
Series I [Member]
Class of Stock [Line Items]
Shares Issued and Outstanding	30,000	30,000
Liquidation Preference	$ 750	$ 750
Discount	5	5
Carrying Amount	$ 745	$ 745
Series J [Member]
Class of Stock [Line Items]
Shares Issued and Outstanding	40,000
Liquidation Preference	$ 1,000
Discount	7
Carrying Amount	$ 993

Shareholders' Equity - Numbe111

Shareholders' Equity - Number of Shares Issued and Outstanding and Carrying Amount of Preferred Stock (Parenthetical) (Detail) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Preferred stock, par value	$ 1	$ 1

Shareholders' Equity - Common S

Shareholders' Equity - Common Stock Repurchased (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Common stock repurchased shares	49	61	52
Purchase of treasury stock	$ 2,622	$ 2,600	$ 2,246

Shareholders' Equity - Reconcil

Shareholders' Equity - Reconciliation of Transactions Affecting Accumulated Other Comprehensive Income (Loss) Included in Shareholders' Equity (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (1,535)	$ (1,019)	$ (896)
Changes in unrealized gains and losses	178	(858)	(457)
Changes in unrealized gains and losses	(5)	74	(25)
Changes in unrealized gains and losses	(41)	(255)	(142)
Changes in unrealized gains and losses	132	(1,039)	(624)
Other-than-temporary impairment not recognized in earnings on securities available-for-sale		(1)
Foreign currency translation adjustment	(2)	(28)	20
Reclassification to earnings of realized gains and losses	77	247	393
Applicable income taxes	(76)	305	88
Balance at end of period	(1,404)	(1,535)	(1,019)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(71)	(43)	(62)
Foreign currency translation adjustment	(2)	(28)	20
Applicable income taxes	4		(1)
Balance at end of period	(69)	(71)	(43)
Unrealized Gains (Losses) on Retirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(1,113)	(1,056)	(1,106)
Changes in unrealized gains and losses	(41)	(255)	(142)
Reclassification to earnings of realized gains and losses	117	163	223
Applicable income taxes	(29)	35	(31)
Balance at end of period	(1,066)	(1,113)	(1,056)
Unrealized Gains (Losses) on Derivative Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	55	(67)	(172)
Changes in unrealized gains and losses	(5)	74	(25)
Reclassification to earnings of realized gains and losses	30	124	195
Applicable income taxes	(9)	(76)	(65)
Balance at end of period	71	55	(67)
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	25	36	52
Reclassification to earnings of realized gains and losses	(13)	(18)	(25)
Applicable income taxes	5	7	9
Balance at end of period	17	25	36
Unrealized Gains (Losses) on Securities Available-For-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(431)	111	392
Changes in unrealized gains and losses	178	(858)	(457)
Other-than-temporary impairment not recognized in earnings on securities available-for-sale		(1)
Reclassification to earnings of realized gains and losses	(57)	(22)
Applicable income taxes	(47)	339	176
Balance at end of period	$ (357)	$ (431)	$ 111

Shareholders' Equity - Impact t

Shareholders' Equity - Impact to Net Income for Items Reclassified out of Accumulated Other Comprehensive Income and into Earnings (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gains (losses) on sale of securities	$ 57	$ 27	$ 1
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, Interest income	14,385	13,167	12,402
Realized gains (losses) on derivative hedges	(2,144)	(1,639)	(1,401)
Actuarial gains (losses) and prior service cost (credit) amortization	(1,186)	(1,119)	(1,167)
Total securities gains (losses), net	57	22
Applicable income taxes	(1,264)	(2,161)	(2,097)
Net income	6,253	5,944	5,933
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(48)	(152)	(242)
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	57	27	1
Other-than-temporary impairment recognized in earnings		(5)	(1)
Total securities gains (losses), net	57	22
Applicable income taxes	(22)	(9)
Net income	35	13
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	13	18	25
Applicable income taxes	(5)	(7)	(9)
Net income	8	11	16
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	(30)	(124)	(195)
Applicable income taxes	11	48	75
Net income	(19)	(76)	(120)
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) and prior service cost (credit) amortization	(117)	(163)	(223)
Applicable income taxes	45	63	85
Net income	$ (72)	$ (100)	$ (138)

Shareholders' Equity - Componen

Shareholders' Equity - Components of Company's Regulatory Capital (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Less intangible assets
Qualifying preferred stock	$ 5,419	$ 5,501
Basel III Transitional Standardized Approach: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common shareholders' equity	43,621	41,797
Less intangible assets
Goodwill (net of deferred tax liability)	(8,613)	(8,203)
Other disallowed intangible assets	(466)	(427)
Other	(173)	553
Total common equity tier 1 capital	34,369	33,720
Qualifying preferred stock	5,419	5,501
Noncontrolling interests eligible for tier 1 capital	117	203
Other	(99)	(3)
Total tier 1 capital	39,806	39,421
Eligible portion of allowance for credit losses	4,417	4,357
Subordinated debt and noncontrolling interests eligible for tier 2 capital	3,280	3,576
Other		1
Total tier 2 capital	7,697	7,934
Total risk-based capital	47,503	47,355
Risk-weighted assets	367,771	358,237
Basel III Transitional Advanced Approaches: [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common shareholders' equity	43,621	41,797
Less intangible assets
Goodwill (net of deferred tax liability)	(8,613)	(8,203)
Other disallowed intangible assets	(466)	(427)
Other	(173)	553
Total common equity tier 1 capital	34,369	33,720
Qualifying preferred stock	5,419	5,501
Noncontrolling interests eligible for tier 1 capital	117	203
Other	(99)	(3)
Total tier 1 capital	39,806	39,421
Eligible portion of allowance for credit losses	1,391	1,266
Subordinated debt and noncontrolling interests eligible for tier 2 capital	3,280	3,576
Other		1
Total tier 2 capital	4,671	4,843
Total risk-based capital	44,477	44,264
Risk-weighted assets	$ 287,211	$ 277,141

Earnings Per Share - Components

Earnings Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to U.S. Bancorp	$ 6,218	$ 5,888	$ 5,879
Preferred dividends	(267)	(281)	(247)
Impact of preferred stock redemption	(10)
Impact of the purchase of noncontrolling interests		9
Earnings allocated to participating stock awards	(28)	(27)	(24)
Net income applicable to U.S. Bancorp common shareholders	$ 5,913	$ 5,589	$ 5,608
Average common shares outstanding	1,677	1,718	1,764
Net effect of the exercise and assumed purchase of stock awards	6	6	8
Average diluted common shares outstanding	1,683	1,724	1,772
Earnings per common share	$ 3.53	$ 3.25	$ 3.18
Diluted earnings per common share	$ 3.51	$ 3.24	$ 3.16

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options outstanding of common shares	1	1	1

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	$ 156,000,000	$ 142,000,000	$ 131,000,000
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	$ 798,000,000	48,000,000
Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	43.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	30.00%
Domestic 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%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	5.00%
Private Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation for the company's qualified pension plan	5.00%
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to qualified pension and postretirement welfare plan	$ 1,238,000,000	383,000,000
Pension Plans [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to qualified pension and postretirement welfare plan	1,200,000,000	358,000,000
Company contributions to pension and postretirement welfare plan in next fiscal year	0
Pension Plans [Member] | Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to pension and postretirement welfare plan in next fiscal year	23,000,000
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to qualified pension and postretirement welfare plan	5,000,000	$ 7,000,000
Company contributions to pension and postretirement welfare plan in next fiscal year	$ 5,000,000

Employee Benefits - Summary of

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 ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plans [Member]
Change In Projected Benefit Obligation
Benefit obligation at beginning of measurement period	$ 5,073	$ 4,650
Service cost	187	177	$ 188
Interest cost	220	211	195
Actuarial loss (gain)	430	234
Lump sum settlements	(45)	(61)
Benefit payments	(145)	(138)
Benefit obligation at end of measurement period	5,720	5,073	4,650
Change In Fair Value Of Plan Assets
Balance at beginning of period	3,769	3,355
Actual return on plan assets	665	230
Employer contributions	1,238	383
Lump sum settlements	(45)	(61)
Benefit payments	(145)	(138)
Balance at end of period	5,482	3,769	3,355
Funded (Unfunded) Status	(238)	(1,304)
Noncurrent benefit asset	270
Current benefit liability	(23)	(22)
Noncurrent benefit liability	(485)	(1,282)
Recognized amount	(238)	(1,304)
Net actuarial gain (loss)	(1,822)	(1,901)
Net prior service credit (cost)		2
Recognized amount	(1,822)	(1,899)
Postretirement Welfare Plan [Member]
Change In Projected Benefit Obligation
Benefit obligation at beginning of measurement period	75	93
Interest cost	2	3	3
Participants' contributions	8	10
Actuarial loss (gain)	(1)	(14)
Benefit payments	(18)	(19)
Federal subsidy on benefits paid	2	2
Benefit obligation at end of measurement period	68	75	93
Change In Fair Value Of Plan Assets
Balance at beginning of period	82	82
Actual return on plan assets	10	2
Employer contributions	5	7
Participants' contributions	8	10
Benefit payments	(18)	(19)
Balance at end of period	87	82	$ 82
Funded (Unfunded) Status	19	7
Noncurrent benefit asset	19	7
Recognized amount	19	7
Net actuarial gain (loss)	68	66
Net prior service credit (cost)	22	25
Recognized amount	$ 90	$ 91

Employee Benefits - Summary 120

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) - USD ($) $ in Billions	Dec. 31, 2017	Dec. 31, 2016
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation for all pension plans	$ 5.2	$ 4.6

Employee Benefits - Pension Pla

Employee Benefits - Pension Plans with Benefit Obligations in Excess of Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Pension Plans with Projected Benefit Obligations in Excess of Plan Assets
Projected benefit obligation	$ 508	$ 5,073
Fair value of plan assets		3,769
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets
Projected benefit obligation	508	5,073
Accumulated benefit obligation	$ 485	4,625
Fair value of plan assets		$ 3,769

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Plans [Member]
Components Of Net Periodic Benefit Cost
Service cost	$ 187	$ 177	$ 188
Interest cost	220	211	195
Expected return on plan assets	(284)	(266)	(223)
Prior service cost (credit) and transition obligation (asset) amortization	(2)	(5)	(4)
Actuarial loss (gain) amortization	127	175	234
Net periodic benefit cost	248	292	390
Net actuarial gain (loss) arising during the year	(48)	(270)	(146)
Net actuarial loss (gain) amortized during the year	127	175	234
Net prior service cost (credit) and transition obligation (asset) amortized during the year	(2)	(5)	(4)
Total recognized in other comprehensive income (loss)	77	(100)	84
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(171)	(392)	(306)
Postretirement Welfare Plan [Member]
Components Of Net Periodic Benefit Cost
Interest cost	2	3	3
Expected return on plan assets	(3)	(1)	(1)
Prior service cost (credit) and transition obligation (asset) amortization	(3)	(3)	(3)
Actuarial loss (gain) amortization	(5)	(4)	(4)
Net periodic benefit cost	(9)	(5)	(5)
Net actuarial gain (loss) arising during the year	7	15	4
Net actuarial loss (gain) amortized during the year	(5)	(4)	(4)
Net prior service cost (credit) and transition obligation (asset) amortized during the year	(3)	(3)	(3)
Total recognized in other comprehensive income (loss)	(1)	8	(3)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ 8	$ 13	$ 2

Employee Benefits - Componen123

Employee Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) $ in Millions	Dec. 31, 2017USD ($)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pretax estimated actuarial loss (gain) that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost	$ 146
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pretax estimated actuarial loss (gain) that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost	(6)
Pretax estimated prior service cost (credit) for pension plan that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost	$ (3)

Employee Benefits - Weighted Av

Employee Benefits - Weighted Average Assumptions to Determine Projected Benefit Obligations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Effect on accumulated postretirement benefit obligation
One percent increase	$ 3	$ 4
One percent decrease	$ (3)	$ (4)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.84%	4.27%
Rate of compensation increase	3.56%	3.58%
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.34%	3.57%
Projected Benefit Obligation Assumptions [Member]
Health care cost trend rate for the next year
Health care cost trend rate assumed for next fiscal year	6.75%	7.00%

Employee Benefits - Weighted125

Employee Benefits - Weighted Average Assumptions to Determine Projected Benefit Obligations (Parenthetical) (Detail) - Projected Benefit Obligation Assumptions [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Assumed rate decrease	5.00%	5.00%
Health care cost trend rate to decrease Period	2,025	2,025
Pension Plans [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	15 years 9 months 18 days	15 years 6 months
Pension Plans [Member] | Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	12 years 3 months 19 days	12 years 1 month 6 days
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	6 years 1 month 6 days	6 years 2 months 12 days

Employee Benefits - Weighted126

Employee Benefits - Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	4.27%	4.45%	4.13%
Expected return on plan assets	7.25%	7.50%	7.50%
Rate of compensation increase	3.58%	4.06%	4.07%
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.57%	3.59%	3.46%
Expected return on plan assets	3.50%	1.50%	1.50%
Prior to Age 65 [Member] | Net Periodic Benefit Cost Assumptions [Member]
Health care cost trend rate
Health care cost trend rate	7.00%	6.50%	7.00%
After Age 65 [Member] | Net Periodic Benefit Cost Assumptions [Member]
Health care cost trend rate
Health care cost trend rate	7.00%	6.50%	7.00%

Employee Benefits - Weighted127

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Prior to Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed rate decrease	5.00%	5.00%	5.00%
Health care cost trend rate to decrease Period	2,025	2,019	2,019
After Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed rate decrease	5.00%	5.00%	5.00%
Health care cost trend rate to decrease Period	2,025	2,019	2,019
Pension Plans [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	15 years 6 months	15 years
Pension Plans [Member] | Nonqualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	12 years 1 month 6 days	11 years 10 months 25 days
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed plan duration	6 years 2 months 12 days	6 years 3 months 19 days

Employee Benefits - Summary 128

Employee Benefits - Summary of Plan Investment Assets Measured at Fair Value (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Level 3 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	$ 2	$ 1	$ 1	$ 2
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	5,482	3,769	3,355
Plan assets measured at fair value, excluding assets not classified in fair hierarchy	2,510	1,477
Pension Plans [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	727	49
Pension Plans [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	1,240	939
Pension Plans [Member] | Real Estate Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	216	169
Pension Plans [Member] | Debt Securities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	205	164
Pension Plans [Member] | Emerging Markets Equity Mutual Fund Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	120	155
Pension Plans [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	2	1
Pension Plans [Member] | Collective Investment Funds Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	1,327	977
Pension Plans [Member] | Collective Investment Fund Mid-Small Cap Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	346	303
Pension Plans [Member] | Collective Investment Funds International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	934	725
Pension Plans [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	200	188
Pension Plans [Member] | Private Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	165	99
Pension Plans [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value, excluding assets not classified in fair hierarchy	1,460	580
Pension Plans [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	727	49
Pension Plans [Member] | Level 1 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	517	362
Pension Plans [Member] | Level 1 [Member] | Real Estate Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	216	169
Pension Plans [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value, excluding assets not classified in fair hierarchy	1,048	896
Pension Plans [Member] | Level 2 [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	723	577
Pension Plans [Member] | Level 2 [Member] | Debt Securities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	205	164
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	120	155
Pension Plans [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value, excluding assets not classified in fair hierarchy	2	1
Pension Plans [Member] | Level 3 [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	2	1
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	87	82	$ 82
Postretirement Welfare Plan [Member] | Collective Investment Funds Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	29
Postretirement Welfare Plan [Member] | Collective Investment Funds International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	22
Postretirement Welfare Plan [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value, excluding assets not classified in fair hierarchy	36	82
Postretirement Welfare Plan [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	$ 36	$ 82

Employee Benefits - Summary 129

Employee Benefits - Summary of Plan Investment Assets Measured at Fair Value (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Real Estate Equity Securities [Member] | Level 1 [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	$ 105	$ 98
Real Estate Equity Securities [Member] | Level 1 [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets measured at fair value	111	71
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	$ 346	$ 303

Employee Benefits - Summarizes

Employee Benefits - Summarizes Changes for Qualified Pension Plan Investment Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) - Other [Member] - Level 3 [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of period	$ 1	$ 1	$ 2
Unrealized gains (losses) relating to assets still held at end of year			(1)
Purchases, sales, and settlements, net	1
Balance at end of period	$ 2	$ 1	$ 1

Employee Benefits - Expected Fu

Employee Benefits - Expected Future Benefit Payments (Detail) $ in Millions	Dec. 31, 2017USD ($)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2,018	$ 201
2,019	215
2,020	232
2,021	250
2,022	260
2023 - 2027	1,564
Postretirement Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,018	10
2,019	9
2,020	9
2,021	8
2,022	8
2023 - 2027	29
Medicare Part D Subsidy [Member]
Defined Benefit Plan Disclosure [Line Items]
2,018	2
2,019	1
2,020	1
2,021	1
2,022	1
2023 - 2027	$ 4

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Shares available for grant under Company's stock incentive plan (subject to adjustment for forfeitures)	37
Fair value of shares vested	$ 180	$ 128	$ 152
Stock-based compensation expense	163	150	125
Stock-based compensation expense on an after tax basis	101	$ 93	$ 78
Unrecognized compensation cost related to nonvested share-based arrangements granted under plans	$ 191
Unrecognized compensation cost recognized over a weighted-average period as compensation expense	2 years 6 months
Minimum [Member]
Stock and unit awards vesting period	3 years
Maximum [Member]
Date of grant exercisable period	10 years
Stock and unit awards vesting period	5 years

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock Options Outstanding and Exercised Under Prior and Existing Stock Incentive Plans (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Stock Options/Shares Outstanding, Weighted-Average Exercise Price, and Additional Disclosures [Abstract]
Stock Options/Shares, Outstanding at Beginning of the Period	17,059,241	25,725,708	33,649,198
Stock Options/Shares, Granted	1,066,188	1,644,288	1,122,697
Stock Options/Shares, Exercised	(5,389,741)	(10,163,668)	(8,721,834)
Stock Options/Shares, Cancelled	(67,221)	(147,087)	(324,353)
Stock Options/Shares, Outstanding at End of the Period	12,668,467	17,059,241	25,725,708
Stock Options/Shares, Exercisable at End of Period	9,647,937	13,856,142	22,446,095
Weighted-Average Exercise Price, Outstanding at Beginning of the Period	$ 29.95	$ 29.82	$ 29.31
Weighted-Average Exercise Price, Granted	54.97	39.50	44.28
Weighted-Average Exercise Price, Exercised	29.58	31.09	29.59
Weighted-Average Exercise Price, Cancelled	43.31	35.18	32.93
Weighted-Average Exercise Price, Outstanding at End of the Period	32.15	29.95	29.82
Weighted-Average Exercise Price, Exercisable at End of Period	$ 27.87	$ 27.53	$ 28.68
Weighted-Average Remaining Contractual Term, Outstanding at the End of the Period	4 years 6 months	4 years 1 month 6 days	3 years 7 months 6 days
Weighted-Average Remaining Contractual Term, Exercisable at End of Period	3 years 3 months 19 days	3 years 1 month 6 days	3 years
Aggregate Intrinsic Value, Outstanding at the End of the Period	$ 272	$ 365	$ 331
Aggregate Intrinsic Value, Exercisable at End of Period	$ 248	$ 330	$ 314

Stock-Based Compensation - Weig

Stock-Based Compensation - Weighted-Average Estimated Fair Value of Stock Options Granted and Assumptions Utilized by Company for Newly Issued Grants (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Estimated fair value	$ 14.66	$ 10.28	$ 12.23
Risk-free interest rates	2.00%	1.30%	1.70%
Dividend yield	2.60%	2.60%	2.60%
Stock volatility factor	0.35%	0.36%	0.37%
Expected life of options (in years)	5 years 6 months	5 years 6 months	5 years 6 months

Stock-Based Compensation - S135

Stock-Based Compensation - Summary of Certain Stock Option Activity (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Fair value of options vested	$ 13	$ 18	$ 25
Intrinsic value of options exercised	127	138	130
Cash received from options exercised	159	316	257
Tax benefit realized from options exercised	$ 49	$ 53	$ 50

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Options Outstanding Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Options, Shares | shares	12,668,467
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	4 years 6 months
Outstanding Options, Weighted-Average Exercise Price	$ 32.15
Exercisable Options, Shares | shares	9,647,937
Exercisable Options, Weighted-Average Exercise Price	$ 27.87
Exercise Price Range $11.02-$20.00 [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	$ 20
Outstanding Options, Shares | shares	1,562,979
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	1 year 2 months 12 days
Outstanding Options, Weighted-Average Exercise Price	$ 11.95
Exercisable Options, Shares | shares	1,562,979
Exercisable Options, Weighted-Average Exercise Price	$ 11.95
Exercise Price 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 | shares	1,363,504
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	2 years 2 months 12 days
Outstanding Options, Weighted-Average Exercise Price	$ 23.85
Exercisable Options, Shares | shares	1,363,504
Exercisable Options, Weighted-Average Exercise Price	$ 23.85
Exercise Price 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 | shares	3,661,570
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	3 years 4 months 24 days
Outstanding Options, Weighted-Average Exercise Price	$ 28.21
Exercisable Options, Shares | shares	3,661,570
Exercisable Options, Weighted-Average Exercise Price	$ 28.21
Exercise Price 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 | shares	1,519,505
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	2 years 7 months 6 days
Outstanding Options, Weighted-Average Exercise Price	$ 33.37
Exercisable Options, Shares | shares	1,519,505
Exercisable Options, Weighted-Average Exercise Price	$ 33.37
Exercise Price 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 | shares	1,534,333
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	8 years 1 month 6 days
Outstanding Options, Weighted-Average Exercise Price	$ 39.49
Exercisable Options, Shares | shares	355,492
Exercisable Options, Weighted-Average Exercise Price	$ 39.49
Exercise Price Range $40.01-$45.00 [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	$ 45
Outstanding Options, Shares | shares	1,971,691
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	6 years 7 months 6 days
Outstanding Options, Weighted-Average Exercise Price	$ 42.33
Exercisable Options, Shares | shares	1,184,802
Exercisable Options, Weighted-Average Exercise Price	$ 41.92
Exercise Price Range $50.01-$55.01 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit of Exercise Prices	50.01
Upper range limit of Exercise Prices	$ 55.01
Outstanding Options, Shares | shares	1,054,885
Outstanding Options, Weighted-Average Remaining Contractual Life (Years)	9 years 1 month 6 days
Outstanding Options, Weighted-Average Exercise Price	$ 54.97
Exercisable Options, Shares | shares	85
Exercisable Options, Weighted-Average Exercise Price	$ 55.01

Stock-Based Compensation - S137

Stock-Based Compensation - Summary of Company's Restricted Shares of Stock and Unit Awards (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	8,265,507	6,894,831	7,921,571
Granted, shares	2,850,927	4,879,421	2,897,396
Vested, shares	(3,295,376)	(3,069,035)	(3,428,736)
Cancelled, shares	(374,103)	(439,710)	(495,400)
Outstanding at end of period, shares	7,446,955	8,265,507	6,894,831
Outstanding at beginning of period, weighted-average grant-date fair value	$ 39.50	$ 38.44	$ 34.09
Granted, weighted-average grant-date fair value	54.45	39.65	44.24
Vested, weighted-average grant-date fair value	40.66	37.25	33.27
Cancelled, weighted-average grant-date fair value	43.91	40.18	38.66
Outstanding at end of period, weighted-average grant-date fair value	$ 44.49	$ 39.50	$ 38.44

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal
Current	$ 2,086	$ 2,585	$ 1,956
Deferred	(1,180)	(711)	(223)
Federal income tax	906	1,874	1,733
State
Current	201	337	346
Deferred	157	(50)	18
State income tax	358	287	364
Applicable income taxes	$ 1,264	$ 2,161	$ 2,097

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes Additional Information [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Unrecognized tax positions that if recognized would impact the effective tax rate	$ 265	$ 234	$ 165
Unrecognized tax positions as a component of income taxes expense, accrued interest	53
Interest recorded on unrecognized tax positions	16	$ 7	$ (1)
Federal, state and foreign net operating loss carryforwards	$ 1,700
Federal, state and foreign net operating loss carryforwards expiration term	Dec. 31, 2037
Base year reserves included in retained earnings of acquired thrift institutions for which no deferred federal income tax liability has been recognized	$ 102
Federal [Member]
Income Taxes Additional Information [Abstract]
Credit carryforwards	$ 2,100
Credit carryforwards expiration term	Dec. 31, 2037

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Expected Income Tax Expense at Federal Statutory Rate of 35 Percent to Company's Applicable Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate	$ 2,631	$ 2,837	$ 2,810
State income tax, at statutory rates, net of federal tax benefit	281	244	237
Revaluation of tax related assets and liabilities	(910)
Tax credits and benefits, net of related expenses	(774)	(710)	(700)
Tax-exempt income	(200)	(196)	(201)
Noncontrolling interests	(12)	(20)	(19)
Nondeductible legal and regulatory expenses	213	30
Other items	35	(24)	(30)
Applicable income taxes	$ 1,264	$ 2,161	$ 2,097

Income Taxes - Reconciliatio141

Income Taxes - Reconciliation of Expected Income Tax Expense at Federal Statutory Rate of 35 Percent to Company's Applicable Income Tax Expense (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Reconciliation [Line Items]
Corporate tax		35.00%	35.00%	35.00%
Net income tax benefit		$ (910)
Scenario, Forecast [Member]
Income Tax Reconciliation [Line Items]
Corporate tax	21.00%

Income Taxes - Reconciliatio142

Income Taxes - Reconciliation of Changes in Federal, State and Foreign Unrecognized Tax Position Balances (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Uncertainties [Abstract]
Balance at beginning of period	$ 302	$ 243	$ 267
Additions (reductions) for tax positions taken in prior years	3	57	(17)
Additions for tax positions taken in the current year	9	12	13
Exam resolutions	(23)	(6)	(17)
Statute expirations	(4)	(4)	(3)
Balance at end of period	$ 287	$ 302	$ 243

Income Taxes - Significant Comp

Income Taxes - Significant Components of the Company's Net Deferred Tax Asset (Liability) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Assets
Federal, state and foreign net operating loss and credit carryforwards	$ 2,249	$ 971
Allowance for credit losses	1,116	1,667
Accrued expenses	468	806
Partnerships and other investment assets	252	521
Securities available-for-sale and financial instruments	111	220
Stock compensation	79	120
Pension and postretirement benefits		394
Other deferred tax assets, net	215	291
Gross deferred tax assets	4,490	4,990
Deferred Tax Liabilities
Leasing activities	(2,277)	(3,096)
Goodwill and other intangible assets	(693)	(962)
Mortgage servicing rights	(604)	(883)
Loans	(160)	(234)
Pension and postretirement benefits	(20)
Fixed assets	(4)	(60)
Other deferred tax liabilities, net	(131)	(113)
Gross deferred tax liabilities	(3,889)	(5,348)
Valuation allowance	(128)	(121)
Net Deferred Tax Asset	$ 473
Net Deferred Tax Liability		$ (479)

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Realized and unrealized gains (losses) on derivatives classified as cash flow hedges recorded in other comprehensive income (loss)		$ 71,000,000	$ 55,000,000
Non-derivative debt instruments designated as net investment hedges		1,200,000,000	0
Fair value of derivatives under collateral agreements in a net liability position		577,000,000
Collateral posted by company netted against net liability position		527,000,000
Forward commitments to sell mortgage loans		4,400,000,000
Hedged mortgage loans held for sale		2,200,000,000
Unfunded mortgage loan commitments		2,300,000,000
Up Scenario [Member] | Net Sensitivity [Member]
Derivative [Line Items]
Net fair value 25 basis points		(1,000,000)	1,000,000
Net fair value 50 basis points		(7,000,000)	(6,000,000)
Net fair value 100 basis points		(34,000,000)	(44,000,000)
Down Scenario [Member] | Net Sensitivity [Member]
Derivative [Line Items]
Net fair value 25 basis points		(4,000,000)	(10,000,000)
Net fair value 50 basis points		(15,000,000)	(29,000,000)
Net fair value 100 basis points		$ (67,000,000)	$ (101,000,000)
Scenario, Forecast [Member]
Derivative [Line Items]
Estimated gain to be reclassified from other comprehensive income (loss) into earnings	$ 4,000,000

Derivative Instruments - Asset

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Detail) - Asset and Liability Management Positions [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional Value, Assets	$ 36,579	$ 27,266
Fair Value, Assets	163	427
Notional Value, Liabilities	21,030	19,339
Fair Value, Liabilities	172	249
Other Derivatives [Member]
Derivative [Line Items]
Notional Value, Assets		$ 19
Derivative Asset Average Remaining Maturity Period		11 days
Notional Value, Liabilities	1,164	$ 830
Fair Value, Liabilities	$ 125	$ 106
Derivative Liability Average Remaining Maturity Period	2 years 6 months	3 years 5 months 1 day
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	$ 2,019	$ 6,452
Fair Value, Assets	$ 5	$ 26
Derivative Asset Average Remaining Maturity Period	16 years 5 months 27 days	11 years 5 months 23 days
Notional Value, Liabilities	$ 5,469	$ 1,561
Fair Value, Liabilities		$ 16
Derivative Liability Average Remaining Maturity Period	8 years 5 months 5 days	6 years 6 months 14 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	$ 4,844	$ 4,705
Fair Value, Assets	$ 21	$ 13
Derivative Asset Average Remaining Maturity Period	7 years 8 months 9 days	6 years 6 months 3 days
Notional Value, Liabilities	$ 46	$ 2,320
Fair Value, Liabilities	$ 1	$ 9
Derivative Liability Average Remaining Maturity Period	6 years 8 months 12 days	7 years 9 months 18 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	$ 1,632	$ 1,748
Fair Value, Assets	$ 7	$ 13
Derivative Asset Average Remaining Maturity Period	1 month 6 days	1 month 2 days
Notional Value, Liabilities	$ 1,326	$ 1,722
Fair Value, Liabilities	$ 2	$ 18
Derivative Liability Average Remaining Maturity Period	15 days	18 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Futures and Forwards [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	$ 15,291	$ 2,278
Fair Value, Assets	$ 10	$ 129
Derivative Asset Average Remaining Maturity Period	10 months 21 days	29 days
Notional Value, Liabilities	$ 4,511	$ 4,214
Fair Value, Liabilities	$ 10	$ 43
Derivative Liability Average Remaining Maturity Period	11 days	1 month 2 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	$ 4,985	$ 1,565
Fair Value, Assets	$ 65	$ 43
Derivative Asset Average Remaining Maturity Period	7 years 6 months 25 days	8 years 7 months 6 days
Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Options [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	$ 1,285	$ 1,073
Fair Value, Assets	$ 21	$ 25
Derivative Asset Average Remaining Maturity Period	1 month 6 days	26 days
Notional Value, Liabilities	$ 5	$ 12
Fair Value, Liabilities		$ 1
Derivative Liability Average Remaining Maturity Period	18 days	22 days
Other Economic Hedges [Member] | Foreign Exchange Forward Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	$ 147	$ 849
Fair Value, Assets	$ 1	$ 6
Derivative Asset Average Remaining Maturity Period	7 days	7 days
Notional Value, Liabilities	$ 669	$ 867
Fair Value, Liabilities	$ 8	$ 6
Derivative Liability Average Remaining Maturity Period	15 days	7 days
Other Economic Hedges [Member] | Equity Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	$ 45	$ 11
Derivative Asset Average Remaining Maturity Period	1 year 1 month 6 days	4 months 24 days
Notional Value, Liabilities	$ 88	$ 102
Fair Value, Liabilities	$ 1	$ 1
Derivative Liability Average Remaining Maturity Period	6 months 29 days	6 months 25 days
Other Economic Hedges [Member] | Credit Contracts [Member]
Derivative [Line Items]
Notional Value, Assets	$ 1,559	$ 1,397
Derivative Asset Average Remaining Maturity Period	3 years 4 months 28 days	3 years 4 months 17 days
Notional Value, Liabilities	$ 3,779	$ 3,674
Fair Value, Liabilities	$ 1	$ 2
Derivative Liability Average Remaining Maturity Period	3 years 1 month 27 days	3 years 6 months 25 days
Fair Value Hedges [Member] | Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	$ 1,000	$ 2,550
Fair Value, Assets	$ 28	$ 49
Derivative Asset Average Remaining Maturity Period	6 years 8 months 12 days	4 years 3 months 11 days
Notional Value, Liabilities	$ 3,600	$ 1,250
Fair Value, Liabilities	$ 16	$ 12
Derivative Liability Average Remaining Maturity Period	1 year 6 months 18 days	2 years 3 months 26 days
Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	$ 3,772	$ 3,272
Fair Value, Assets	$ 5	$ 108
Derivative Asset Average Remaining Maturity Period	6 years 8 months 23 days	8 years 7 months 17 days
Notional Value, Liabilities		$ 2,787
Fair Value, Liabilities		$ 35
Derivative Liability Average Remaining Maturity Period		9 months 29 days
Net Investment Hedges [Member] | Foreign Exchange Forward Contracts [Member]
Derivative [Line Items]
Notional Value, Assets		$ 1,347
Fair Value, Assets		$ 15
Derivative Asset Average Remaining Maturity Period		15 days
Notional Value, Liabilities	$ 373
Fair Value, Liabilities	$ 8
Derivative Liability Average Remaining Maturity Period	18 days

Derivative Instruments - Ass146

Derivative Instruments - Asset and Liability Management Derivative Positions of Company (Parenthetical) (Detail) - Asset and Liability Management Positions [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional Value, Assets	$ 36,579	$ 27,266
Notional Value, Liabilities	21,030	19,339
Fair Value, Liabilities	172	249
Underwriting Purchase and Sale Commitments [Member]
Derivative [Line Items]
Notional Value, Assets		19
Notional Value, Liabilities		19
Swap [Member] | Visa Class B Shares [Member]
Derivative [Line Items]
Notional Value, Liabilities	1,200	811
Fair Value, Liabilities	$ 125	$ 106
Derivative Liability Average Remaining Maturity Period	2 years 6 months	3 years 6 months

Derivative Instruments - Custom

Derivative Instruments - Customer-Related Derivative Positions of Company (Detail) - Customer-Related Positions [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional Value, Assets	$ 156,822	$ 113,188
Fair Value, Assets	2,319	2,543
Notional Value, Liabilities	140,485	122,497
Fair Value, Liabilities	2,195	2,610
Interest Rate Contracts [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	28,681	38,501
Fair Value, Assets	$ 679	$ 930
Derivative Asset Average Remaining Maturity Period	5 years 8 months 16 days	4 years 26 days
Notional Value, Liabilities	$ 59,990	$ 39,403
Fair Value, Liabilities	$ 840	$ 632
Derivative Liability Average Remaining Maturity Period	4 years 3 months 8 days	4 years 10 months 21 days
Interest Rate Contracts [Member] | Pay Fixed/Receive Floating Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	$ 63,038	$ 36,671
Fair Value, Assets	$ 860	$ 612
Derivative Asset Average Remaining Maturity Period	4 years 2 months 12 days	4 years 11 months 26 days
Notional Value, Liabilities	$ 25,093	$ 40,324
Fair Value, Liabilities	$ 602	$ 996
Derivative Liability Average Remaining Maturity Period	5 years 9 months 3 days	4 years 26 days
Interest Rate Contracts [Member] | Options [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	$ 29,091	$ 14,545
Fair Value, Assets	$ 22	$ 51
Derivative Asset Average Remaining Maturity Period	1 year 7 months 10 days	1 year 10 months 6 days
Notional Value, Liabilities	$ 880	$ 125
Fair Value, Liabilities	$ 14	$ 2
Derivative Liability Average Remaining Maturity Period	4 years 2 months 27 days	1 year 4 months 13 days
Interest Rate Contracts [Member] | Options [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	$ 880	$ 125
Fair Value, Assets	$ 15	$ 3
Derivative Asset Average Remaining Maturity Period	4 years 2 months 27 days	1 year 4 months 13 days
Notional Value, Liabilities	$ 27,056	$ 13,518
Fair Value, Liabilities	$ 20	$ 50
Derivative Liability Average Remaining Maturity Period	1 year 6 months	1 year 8 months 12 days
Interest Rate Contracts [Member] | Futures [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets		$ 306
Derivative Asset Average Remaining Maturity Period		1 year 11 months 15 days
Notional Value, Liabilities		$ 7,111
Fair Value, Liabilities		$ 7
Derivative Liability Average Remaining Maturity Period		10 months 25 days
Interest Rate Contracts [Member] | Futures [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Assets	$ 7,007
Fair Value, Assets	$ 4
Derivative Asset Average Remaining Maturity Period	1 year 2 months 16 days
Foreign Exchange Rate Contracts [Member] | Forwards, Spots and Swaps [Member]
Derivative [Line Items]
Notional Value, Assets	$ 24,099	$ 20,664
Fair Value, Assets	$ 656	$ 849
Derivative Asset Average Remaining Maturity Period	9 months 22 days	6 months 29 days
Notional Value, Liabilities	$ 23,440	$ 19,640
Fair Value, Liabilities	$ 636	$ 825
Derivative Liability Average Remaining Maturity Period	9 months 29 days	7 months 6 days
Foreign Exchange Option [Member] | Purchased [Member]
Derivative [Line Items]
Notional Value, Assets	$ 4,026	$ 2,376
Fair Value, Assets	$ 83	$ 98
Derivative Asset Average Remaining Maturity Period	1 year 2 months 12 days	1 year 8 months 2 days
Foreign Exchange Option [Member] | Written [Member]
Derivative [Line Items]
Notional Value, Liabilities	$ 4,026	$ 2,376
Fair Value, Liabilities	$ 83	$ 98
Derivative Liability Average Remaining Maturity Period	1 year 2 months 12 days	1 year 8 months 2 days

Derivative Instruments - Summar

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 ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	$ (3)	$ 46	$ (15)
Derivative Instruments, Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	(19)	(76)	(120)
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	(56)	$ 33	$ 101
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	$ (46)

Derivative Instruments - Sum149

Derivative Instruments - Summary of Gains (Losses) Recognized in Earnings for Fair Value Hedges, Other Economic Hedges and Customer-Related Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Other Noninterest Income [Member] | Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	$ (24)	$ (5)	$ 3
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	(876)	(708)	360
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	943	769	(320)
Customer-Related Positions [Member] | Interest Rate Contracts [Member] | Other Noninterest Income [Member] | Futures [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	(3)	(6)	1
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	92	88	74
Customer-Related Positions [Member] | Foreign Exchange Option [Member] | Commercial Products Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	2	(1)	2
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	(28)	(31)	7
Asset and Liability Management Positions [Member] | Other Derivatives [Member] | Other Noninterest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	(1)	(39)
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Mortgage Banking Revenue [Member] | Futures and Forwards [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	24	101	186
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Mortgage Banking Revenue [Member] | Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	237	331	191
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Mortgage Banking Revenue [Member] | Receive Fixed/Pay Floating Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	255	226	139
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Interest Rate Contracts [Member] | Mortgage Banking Revenue [Member] | Pay Fixed/Receive Floating Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	(220)	(140)	(33)
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Foreign Exchange Forward Contracts [Member] | Commercial Products Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	(69)	(14)	108
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Equity Contracts [Member] | Compensation Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	1	1	(1)
Asset and Liability Management Positions [Member] | Other Economic Hedges [Member] | Credit Contracts [Member] | Other Noninterest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in earnings	$ 3	$ 1	$ 2

Derivative Instruments - Sum150

Derivative Instruments - Summary of Gains (Losses) Recognized in Earnings for Fair Value Hedges, Other Economic Hedges and Customer-Related Positions (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Asset and Liability Management Positions [Member] | Interest Rate Contracts [Member] | Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (losses) on items hedged by fair value hedges	$ 28	$ 31	$ (7)

Netting Arrangements for Cer151

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Additional Information (Detail) $ in Billions	Dec. 31, 2017USD ($)
Derivative [Line Items]
Notional amount of derivative	$ 354.9
Over the Counter Trades [Member]
Derivative [Line Items]
Notional amount of derivative	189.8
Exchange Cleared [Member]
Derivative [Line Items]
Notional amount of derivative	146.1
Exchange Traded [Member]
Derivative [Line Items]
Notional amount of derivative	$ 19

Netting Arrangements for Cer152

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Summary of Maturities by Category of Collateral Pledged for Repurchase Agreements and Securities Loaned Transactions (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 803	$ 801
Securities loaned	111	223
Gross amount of recognized liabilities for repurchase agreements and securities loaned	914	1,024
Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	773	771
Securities loaned	111	223
Gross amount of recognized liabilities for repurchase agreements and securities loaned	884	994
Less Than 30 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	30	30
Gross amount of recognized liabilities for repurchase agreements and securities loaned	30	30
Corporate Debt Securities [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	104	30
Securities loaned	111	223
Corporate Debt Securities [Member] | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	104	30
Securities loaned	111	223
U.S. Treasury and Agencies [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	25	60
U.S. Treasury and Agencies [Member] | Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	25	60
Mortgage-Backed Securities Residential [Member] | Agency [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	674	711
Mortgage-Backed Securities Residential [Member] | Overnight and Continuous [Member] | Agency [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	644	681
Mortgage-Backed Securities Residential [Member] | Less Than 30 Days [Member] | Agency [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 30	$ 30

Netting Arrangements for Cer153

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Assets But Available for Offset in Event of Default (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Offsetting [Abstract]
Derivative assets Gross Recognized Assets	$ 1,759	$ 2,122
Reverse repurchase agreements Gross Recognized Assets	24	77
Securities borrowed Gross Recognized Assets	923	944
Total Gross Recognized Assets	2,706	3,143
Derivative assets Gross amounts assets offset in consolidated balance sheet	(652)	(984)
Total Gross amounts assets offset in consolidated balance sheet	(652)	(984)
Derivative assets Net Amounts Presented in the Consolidated Balance Sheet	1,107	1,138
Reverse repurchase agreements Net Amounts Presented in the Consolidated Balance Sheet	24	77
Securities borrowed Net Amounts Presented in the Consolidated Balance Sheet	923	944
Total Net Amounts Presented in the Consolidated Balance Sheet	2,054	2,159
Derivative assets Gross financial instrument asset amounts not offset in consolidated balance sheet	(110)	(78)
Reverse repurchase agreements Gross financial instrument asset amounts not offset in consolidated balance sheet	(24)	(60)
Securities borrowed Gross financial instrument asset amounts not offset in consolidated balance sheet		(10)
Total Gross financial instrument asset amounts not offset in consolidated balance sheet	(134)	(148)
Derivative assets Gross collateral received amounts not offset in consolidated balance sheet	(5)	(10)
Reverse repurchase agreements Gross collateral received amounts not offset in consolidated balance sheet		(17)
Securities borrowed Gross collateral received amounts not offset in consolidated balance sheet	(896)	(909)
Total Gross collateral received amounts not offset in consolidated balance sheet	(901)	(936)
Derivative assets Net Amount	992	1,050
Reverse repurchase agreements Net Amount	0	0
Securities borrowed Net Amount	27	25
Total Net Amount Assets	$ 1,019	$ 1,075

Netting Arrangements for Cer154

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Assets But Available for Offset in Event of Default (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Offsetting [Abstract]
Cash collateral netted against derivative assets	$ 50	$ 210
Derivative assets not subject to netting arrangements	$ 723	$ 848

Netting Arrangements for Cer155

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Liabilities But Available for Offset in Event of Default (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Offsetting [Abstract]
Derivative liabilities Gross recognized liabilities	$ 1,629	$ 1,951
Repurchase agreements Gross recognized liabilities	803	801
Securities loaned Gross recognized liabilities	111	223
Total Gross recognized liabilities	2,543	2,975
Derivative liabilities Gross amounts liabilities offset in consolidated balance sheet	(1,130)	(1,185)
Total Gross amounts liabilities offset in consolidated balance sheet	(1,130)	(1,185)
Derivative liabilities Net amounts liabilities presented in consolidated balance sheet	499	766
Repurchase agreements Net amounts liabilities presented in consolidated balance sheet	803	801
Securities loaned Net amounts liabilities presented in consolidated balance sheet	111	223
Total Net amounts liabilities presented in consolidated balance sheet	1,413	1,790
Derivative liabilities Gross financial instrument liability amounts not offset in consolidated balance sheet	(110)	(78)
Repurchase agreements Gross financial instrument liability amounts not offset in consolidated balance sheet	(24)	(60)
Securities loaned Gross financial instruments not offset in consolidated balance sheet		(10)
Total Gross financial instrument liability amounts not offset in consolidated balance sheet	(134)	(148)
Repurchase agreements Gross collateral pledged amounts not offset in consolidated balance sheet	(779)	(741)
Securities loaned Gross collateral pledged amounts not offset in consolidated balance sheet	(110)	(211)
Total Gross collateral pledged amounts not offset in consolidated balance sheet	(889)	(952)
Derivative liabilities Net Amount	389	688
Repurchase agreements Net Amount	0	0
Securities loaned Net Amount	1	2
Total Net Amount Liabilities	$ 390	$ 690

Netting Arrangements for Cer156

Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Liabilities But Available for Offset in Event of Default (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Offsetting [Abstract]
Cash collateral netted against derivative liabilities	$ 528	$ 411
Derivative liabilities not subject to netting arrangements	$ 738	$ 908

Fair Values of Assets and Li157

Fair Values of Assets and Liabilities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair value measurement transfers from one level to another	$ 0	$ 0	$ 0
Significant changes to the valuation techniques to measure fair value during the reporting period	No significant changes to the valuation techniques used by the Company to measure fair value.
Mortgage loans held for sale measured at fair value, net gain	$ 84,000,000	33,000,000	$ 27,000,000
Carrying value of unfunded commitments, deferred non-yield related loan fees and standby letters of credit	555,000,000	618,000,000
Other guarantees carrying value	$ 192,000,000	$ 186,000,000
Minimum [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of derivative contract fair value	0.00%
Maximum [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of derivative contract fair value	98.00%
Average [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of derivative contract fair value	2.00%

Fair Values of Assets and Li158

Fair Values of Assets and Liabilities - Valuation Assumption Ranges for MSRs (Detail) - Mortgage Servicing Rights [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	10.00%	10.00%
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	6.00%
Option adjusted spread	7.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	17.00%
Option adjusted spread	10.00%
Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected prepayment	10.00%
Option adjusted spread	8.00%

Fair Values of Assets and Li159

Fair Values of Assets and Liabilities - Valuation Assumption Ranges for Derivative Commitments (Detail) - Derivative Mortgage Loans Commitments [Member]	Dec. 31, 2017
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected loan close rate	6.00%
Inherent MSR value (basis points per loan)	(1.00%)
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected loan close rate	100.00%
Inherent MSR value (basis points per loan)	184.00%
Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Expected loan close rate	80.00%
Inherent MSR value (basis points per loan)	117.00%

Fair Values of Assets and Li160

Fair Values of Assets and Liabilities - Balances of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities netting		$ (1,130)	$ (1,185)
Derivative liabilities total		499	766
Derivative assets netting		(652)	(984)
Derivative assets total		1,107	1,138
Available-for-sale securities	[1]	68,137	66,284
Mortgage loans held for sale		3,534	4,822
Mortgage servicing rights		2,645	2,591	$ 2,512	$ 2,338
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities total		1,237	1,674
Derivative assets total		1,830	1,986
Available-for-sale securities		68,137	66,284
Mortgage loans held for sale		3,534	4,822
Mortgage servicing rights		2,645	2,591
Other assets		1,317	1,320
Total		77,463	77,003
Short-term borrowings and other liabilities		995	1,080
Total		2,232	2,754
Fair Value, Measurements, Recurring [Member] | Netting and Collateral One [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities netting		(1,130)	(1,185)
Derivative assets netting		(652)	(984)
Total		(652)	(984)
Total		(1,130)	(1,185)
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		23,301	17,127
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		6,358	5,039
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
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		22	36
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			242
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			195
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		38,031	43,138
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		6	15
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		419	483
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities before netting			7
Derivative assets before netting		6
Available-for-sale securities		22,594	16,391
Other assets		154	183
Total		22,754	16,574
Short-term borrowings and other liabilities		101	142
Total		101	149
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		22,572	16,355
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		22	36
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities before netting		1,958	2,469
Derivative assets before netting		1,960	2,416
Available-for-sale securities		45,543	49,445
Mortgage loans held for sale		3,534	4,822
Other assets		1,163	1,137
Total		52,200	57,820
Short-term borrowings and other liabilities		894	938
Total		2,852	3,407
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		729	772
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		6,358	5,039
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		38,031	43,138
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		6	15
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		419	481
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		409	383
Derivative assets before netting		516	554
Available-for-sale securities			448
Mortgage servicing rights		2,645	2,591
Total		3,161	3,593
Total		$ 409	383
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
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			242
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			195
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			$ 2
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

Fair Values of Assets and Li161

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 ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	$ 242	$ 318	$ 405
Net Gains (Losses) Included in Net Income		(1)
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	(2)		(4)
Sales	(234)
Principal Payments	(6)	(75)	(83)
Settlements	0	0	0
End of Period Balance		242	318
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Held at End of Period			(4)
Non-Agency Non-Prime [Member] | Mortgage-Backed Securities Residential [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	195	240	280
Net Gains (Losses) Included in Net Income		(1)	(1)
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	(17)	(2)	(1)
Sales	(175)
Principal Payments	(3)	(42)	(38)
Settlements	0	0	0
End of Period Balance		195	240
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Held at End of Period		(2)	(1)
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 Other Comprehensive Income (Loss)	2
Sales	(11)
Settlements	0	0	0
End of Period Balance		9	9
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	2	2	62
Net Gains (Losses) Included in Net Income			4
Net Gains (Losses) Included in Other Comprehensive Income (Loss)			(2)
Sales	(2)		(51)
Principal Payments			(11)
Settlements	0	0	0
End of Period Balance		2	2
Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	2,591	2,512	2,338
Net Gains (Losses) Included in Net Income	(404)	(488)	(487)
Purchases	13	43	29
Issuances	445	524	632
Settlements	0	0	0
End of Period Balance	2,645	2,591	2,512
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Held at End of Period	(404)	(488)	(487)
Available-for-Sale Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	448	569	756
Net Gains (Losses) Included in Net Income		(2)	3
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	(17)	(2)	(7)
Sales	(422)		(51)
Principal Payments	(9)	(117)	(132)
Settlements	0	0	0
End of Period Balance		448	569
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Held at End of Period		(2)	(5)
Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning of Period Balance	171	498	574
Net Gains (Losses) Included in Net Income	317	332	707
Net Gains (Losses) Included in Other Comprehensive Income (Loss)	0	0	0
Purchases	1	2	1
Sales	(10)	(14)	(13)
Principal Payments	0	0	0
Issuances	0	0	0
Settlements	(372)	(647)	(771)
End of Period Balance	107	171	498
Net Change in Unrealized Gains (Losses) Relating to Assets and Liabilities Held at End of Period	$ (52)	$ (257)	$ 135

Fair Values of Assets and Li162

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 ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	$ 21	$ (77)	$ 289
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	(77)	(276)	92
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	296	409	418
Net Change in net derivative asset and liability unrealized gains (losses) relating to assets still held at end of period	$ 25	19	$ 43
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)
Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net gains and losses on available for sale securities included in net income		$ 1

Fair Values of Assets and Li163

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 ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 150	$ 59
Other assets	31	60
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	150	59
Other assets	$ 31	$ 60

Fair Values of Assets and Li164

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 ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans Receivable [Member]
Fair Value Assets Measured On Nonrecurring Basis Losses Recognized [Line Items]
Losses recognized related to nonrecurring fair value measurements	$ 171	$ 192	$ 175
Other Assets [Member]
Fair Value Assets Measured On Nonrecurring Basis Losses Recognized [Line Items]
Losses recognized related to nonrecurring fair value measurements	$ 20	$ 32	$ 42

Fair Values of Assets and Li165

Fair Values of Assets and Liabilities - Differences Between Aggregate Fair Value Carrying Amount of MLHFS for which Fair Value Option has been Elected and Aggregate Unpaid Principal Amount Contractually Obligated to Receive at Maturity (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair value carrying amount, total loans	$ 3,534	$ 4,822
Fair value carrying amount, nonaccrual loans	1	2
Fair value carrying amount, loans 90 days or more past due	1	1
Aggregate unpaid principal, total loans	3,434	4,763
Aggregate unpaid principal, nonaccrual loans	2	3
Aggregate unpaid principal, loans 90 days or more past due	1	1
Carrying amount over (under) unpaid principal, total loans	100	59
Carrying amount over (under) unpaid principal, nonaccrual loans	(1)	(1)
Carrying amount over (under) unpaid principal, loans 90 days or more past due	$ 0	$ 0

Fair Values of Assets and Li166

Fair Values of Assets and Liabilities - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial Assets
Cash and due from banks	$ 19,505	$ 15,705	$ 11,147	$ 10,654
Investment securities held-to-maturity	44,362	42,991
Loans	276,507	269,394
Financial Liabilities
Deposits	347,215	334,590
Long-term debt	32,259	33,323
Carrying Amount [Member]
Financial Assets
Cash and due from banks	19,505	15,705
Federal funds sold and securities purchased under resale agreements	93	138
Investment securities held-to-maturity	44,362	42,991
Loans held for sale	20	4
Loans	276,507	269,394
Other financial instruments	2,393	2,362
Financial Liabilities
Deposits	347,215	334,590
Short-term borrowings	15,656	12,891
Long-term debt	32,259	33,323
Other liabilities	1,556	1,702
Fair Value [Member]
Financial Assets
Cash and due from banks	19,505	15,705
Federal funds sold and securities purchased under resale agreements	93	138
Investment securities held-to-maturity	43,723	42,435
Loans held for sale	20	4
Loans	279,391	273,422
Other financial instruments	2,401	2,369
Financial Liabilities
Deposits	346,979	334,361
Short-term borrowings	15,447	12,706
Long-term debt	32,377	33,678
Other liabilities	1,556	1,702
Fair Value [Member] | Level 1 [Member]
Financial Assets
Cash and due from banks	19,505	15,705
Investment securities held-to-maturity	4,613	4,605
Fair Value [Member] | Level 2 [Member]
Financial Assets
Federal funds sold and securities purchased under resale agreements	93	138
Investment securities held-to-maturity	39,095	37,810
Other financial instruments	1,037	920
Financial Liabilities
Deposits	346,979	334,361
Short-term borrowings	15,447	12,706
Long-term debt	32,377	33,678
Fair Value [Member] | Level 3 [Member]
Financial Assets
Investment securities held-to-maturity	15	20
Loans held for sale	20	4
Loans	279,391	273,422
Other financial instruments	1,364	1,449
Financial Liabilities
Other liabilities	$ 1,556	$ 1,702

Guarantees and Contingent Li167

Guarantees and Contingent Liabilities - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Guarantees And Contingent Liabilities (Textual) [Abstract]
Liability related to remaining Visa Litigation, carrying amount		$ 19
Rental expense for operating leases		338	$ 326	$ 328
Securities Lending Indemnifications [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		2,828
Collateral Held		2,912
Tender Option Bond Program Guarantee [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		2,337
Collateral Held		2,507
Minimum Revenue Guarantees [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		7
Standby Letters of Credit [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		$ 10,857
Weighted-average term of standby letter of credit arrangements		20 months
Carrying Amount		$ 52
Third Party Borrowing Arrangements [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		7
Asset Sales [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		6,683
Carrying Amount		125
Reserve for potential losses related to sale or syndication of tax-advantage investments		112
Representation and warranty reserve		13	19
Unresolved representation and warranty claims from GSEs		9	$ 7
Merchant Processing [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		95,780
Carrying Amount		50
Collateral Held		481
Value of airline tickets purchased to deliver at future date through card transactions		6,600
Company held collateral in escrow deposits, letters of credit and indemnities from financial institutions and liens on various assets		378
Company held collateral of merchant escrow deposits with respect to future delivery risk		3
Liability primarily related to airline processing arrangements		37
Merchant escrow deposits held as collateral related to unresolved charge-backs		100
Recorded liability for potential losses related to unresolved charge-backs		13
Other Guarantees [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Maximum Potential Future Payments		1,290
Carrying Amount		17
Maximum potential future payments related to operations of subsidiaries		$ 609
Other Guarantees [Member] | USB Capital IX [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Percentage of common equity in wholly owned USB Capital IX		100.00%
Issuance trust		USB Capital IX
Total assets of trust consisting primarily of Series A Preferred Stock		$ 682
Company payment obligation guarantee of trust to third party investors		$ 681
Subsequent Event [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
United States Attorney's office settlement	$ 528
United States Attorney's office settlement net payment	453
Office of the Comptroller of the Currency civil money penalty	75
Financial Crimes Enforcement Network civil money penalty	185
Financial Crimes Enforcement Network civil money penalty payment	70
Federal Reserve civil money penalty	15
Settlement and civil money penalty payment	$ 613
Visa Class B Shares [Member]
Guarantees And Contingent Liabilities (Textual) [Abstract]
Number of shares sold		2.2
Remaining shares held by the Company		2.7

Guarantees and Contingent Li168

Guarantees and Contingent Liabilities - Contract or Notional Amounts of Unfunded Commitments to Extend Credit (Detail) $ in Millions	Dec. 31, 2017USD ($)
Commercial and Commercial Real Estate Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	$ 129,551
Corporate and Purchasing Card Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	26,002
Residential Mortgages [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	219
Credit Card [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	106,285
Other Retail Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	37,307
Covered Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	126
Other [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	5,672
Less Than One Year [Member] | Commercial and Commercial Real Estate Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	28,903
Less Than One Year [Member] | Corporate and Purchasing Card Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	26,002
Less Than One Year [Member] | Residential Mortgages [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	216
Less Than One Year [Member] | Credit Card [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	106,285
Less Than One Year [Member] | Other Retail Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	13,707
Less Than One Year [Member] | Other [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	5,672
Greater Than One Year [Member] | Commercial and Commercial Real Estate Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	100,648
Greater Than One Year [Member] | Residential Mortgages [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	3
Greater Than One Year [Member] | Other Retail Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	23,600
Greater Than One Year [Member] | Covered Loans [Member]
Other Commitments [Line Items]
Contract or notional amounts of unfunded commitments to extend credit	$ 126

Guarantees and Contingent Li169

Guarantees and Contingent Liabilities - Future Minimum Payments Under Capital Leases and Noncancelable Operating Leases (Detail) $ in Millions	Dec. 31, 2017USD ($)
Capital Leases
Capital Leases, 2018	$ 17
Capital Leases, 2019	16
Capital Leases, 2020	14
Capital Leases, 2021	11
Capital Leases, 2022	9
Capital Leases, Thereafter	35
Total minimum capital lease payments	102
Less amount representing interest	34
Present value of net minimum capital lease payments	68
Operating Leases
Operating Leases, 2018	277
Operating Leases, 2019	250
Operating Leases, 2020	210
Operating Leases, 2021	185
Operating Leases, 2022	159
Operating Leases, Thereafter	563
Total minimum operating lease payments	$ 1,644

Guarantees and Contingent Li170

Guarantees and Contingent Liabilities - Summary of Other Guarantees and Contingent Liabilities (Detail) $ in Millions	Dec. 31, 2017USD ($)
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Carrying Amount	$ 52
Maximum Potential Future Payments	10,857
Third Party Borrowing Arrangements [Member]
Guarantor Obligations [Line Items]
Maximum Potential Future Payments	7
Securities Lending Indemnifications [Member]
Guarantor Obligations [Line Items]
Collateral Held	2,912
Maximum Potential Future Payments	2,828
Asset Sales [Member]
Guarantor Obligations [Line Items]
Carrying Amount	125
Maximum Potential Future Payments	6,683
Merchant Processing [Member]
Guarantor Obligations [Line Items]
Collateral Held	481
Carrying Amount	50
Maximum Potential Future Payments	95,780
Tender Option Bond Program Guarantee [Member]
Guarantor Obligations [Line Items]
Collateral Held	2,507
Maximum Potential Future Payments	2,337
Minimum Revenue Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum Potential Future Payments	7
Other Guarantees [Member]
Guarantor Obligations [Line Items]
Carrying Amount	17
Maximum Potential Future Payments	$ 1,290

Guarantees and Contingent Li171

Guarantees and Contingent Liabilities - Contract or Notional Amount of Letters of Credit (Detail) $ in Millions	Dec. 31, 2017USD ($)
Standby Letters of Credit [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	$ 10,857
Commercial [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	422
Less Than One Year [Member] | Standby Letters of Credit [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	4,891
Less Than One Year [Member] | Commercial [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	398
Greater Than One Year [Member] | Standby Letters of Credit [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	5,966
Greater Than One Year [Member] | Commercial [Member]
Letters Of Credit [Line Items]
Contract or notional amount of letters of credit	$ 24

U.S. Bancorp (Parent Company) -

U.S. Bancorp (Parent Company) - Condensed Statement of Financial Position of Parent Company Only (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Available-for-sale securities	[1]	$ 68,137	$ 66,284
Other assets	[1]	34,881	31,674
Total assets		462,040	445,964
Liabilities and Shareholders' Equity
Short-term funds borrowed		16,651	13,963	$ 27,877
Long-term debt		32,259	33,323
Other liabilities		16,249	16,155
Shareholders' equity		49,040	47,298
Total liabilities and equity		462,040	445,964
Parent Company [Member]
Assets
Due from banks, principally interest-bearing		9,157	7,800
Available-for-sale securities		963	225
Other assets		1,079	1,052
Total assets		65,529	61,423
Liabilities and Shareholders' Equity
Short-term funds borrowed		1	22
Long-term debt		15,769	13,045
Other liabilities		719	1,058
Shareholders' equity		49,040	47,298
Total liabilities and equity		65,529	61,423
Bank Subsidiaries [Member] | Parent Company [Member]
Assets
Investments in subsidiaries		46,435	44,955
Advances to subsidiaries		3,300	3,800
Nonbank Subsidiaries [Member] | Parent Company [Member]
Assets
Investments in subsidiaries		2,540	2,326
Advances to subsidiaries		$ 2,055	$ 1,265
[1]	Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.

U.S. Bancorp (Parent Company173

U.S. Bancorp (Parent Company) - Condensed Income Statement of Parent Company Only (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income
Other income	$ 860	$ 993	$ 907
Total net revenue	22,057	21,308
Expense
Interest expense	2,144	1,639	1,401
Other expense	2,558	1,975	1,819
Income before income taxes and equity in undistributed income of subsidiaries	7,517	8,105	8,030
Applicable income taxes	1,264	2,161	2,097
Net income attributable to U.S. Bancorp	6,218	5,888	5,879
Parent Company [Member]
Income
Interest from subsidiaries	159	140	120
Other income	41	57	55
Total net revenue	5,005	2,301	4,078
Expense
Interest expense	402	327	292
Other expense	124	123	105
Total expense	526	450	397
Income before income taxes and equity in undistributed income of subsidiaries	4,479	1,851	3,681
Applicable income taxes	(176)	(97)	(207)
Income of parent company	4,655	1,948	3,888
Equity in undistributed income of subsidiaries	1,563	3,940	1,991
Net income attributable to U.S. Bancorp	6,218	5,888	5,879
Bank Subsidiaries [Member] | Parent Company [Member]
Income
Dividends from subsidiaries	4,800	2,100	3,900
Nonbank Subsidiaries [Member] | Parent Company [Member]
Income
Dividends from subsidiaries	$ 5	$ 4	$ 3

U.S. Bancorp (Parent Company174

U.S. Bancorp (Parent Company) - Condensed Statement of Cash Flows of Parent Company Only (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities
Net income attributable to U.S. Bancorp	$ 6,218	$ 5,888	$ 5,879
Adjustments to reconcile net income to net cash provided by operating activities
Other, net	(2,049)	487	787
Net cash provided by operating activities	6,472	5,336	8,782
Investing Activities
Other, net	(350)	322	(1,526)
Net cash used in investing activities	(12,126)	(17,958)	(21,150)
Financing Activities
Net decrease in short-term borrowings	2,688	(13,914)	(2,016)
Proceeds from issuance of long-term debt	9,434	10,715	5,067
Principal payments or redemption of long-term debt	(10,517)	(9,495)	(5,311)
Proceeds from issuance of preferred stock	993		745
Proceeds from issuance of common stock	159	355	295
Repurchase of preferred stock	(1,085)
Repurchase of common stock	(2,631)	(2,556)	(2,190)
Cash dividends paid on preferred stock	(284)	(267)	(242)
Cash dividends paid on common stock	(1,928)	(1,810)	(1,777)
Net cash provided by financing activities	9,454	17,180	12,861
Change in cash and due from banks	3,800	4,558	493
Cash and due from banks at beginning of year	15,705	11,147	10,654
Cash and due from banks at end of year	19,505	15,705	11,147
Parent Company [Member]
Operating Activities
Net income attributable to U.S. Bancorp	6,218	5,888	5,879
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed income of subsidiaries	(1,563)	(3,940)	(1,991)
Other, net	(125)	75	507
Net cash provided by operating activities	4,530	2,023	4,395
Investing Activities
Proceeds from sales and maturities of investment securities	100	232	153
Purchases of investment securities	(844)	(120)	(47)
Net increase in short-term advances to subsidiaries	(790)	(442)	(273)
Long-term advances to subsidiaries		(750)	(500)
Principal collected on long-term advances to subsidiaries	500	100
Other, net	(12)	(12)	(6)
Net cash used in investing activities	(1,046)	(992)	(673)
Financing Activities
Net decrease in short-term borrowings	(21)	(3)	(152)
Proceeds from issuance of long-term debt	3,920	3,550
Principal payments or redemption of long-term debt	(1,250)	(1,926)	(1,750)
Proceeds from issuance of preferred stock	993		745
Proceeds from issuance of common stock	159	355	295
Repurchase of preferred stock	(1,085)
Repurchase of common stock	(2,631)	(2,556)	(2,190)
Cash dividends paid on preferred stock	(284)	(267)	(242)
Cash dividends paid on common stock	(1,928)	(1,810)	(1,777)
Net cash provided by financing activities	(2,127)	(2,657)	(5,071)
Change in cash and due from banks	1,357	(1,626)	(1,349)
Cash and due from banks at beginning of year	7,800	9,426	10,775
Cash and due from banks at end of year	$ 9,157	$ 7,800	$ 9,426

U.S. Bancorp (Parent Company175

U.S. Bancorp (Parent Company) - Additional Information (Detail)	Dec. 31, 2017
Receivables
Loan Limits to the company or individual affiliate	10.00%
Maximum limit of loans to the Company and all affiliates	20.00%