Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2017
Policy (Text Block) [Abstract]
Principles of Consolidation	Principles of Consolidation The Consolidated Financial Statements of the Company are prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Significant intercompany transactions are eliminated. The Company consolidates entities in which it holds a “controlling financial interest.” For voting interest entities, the Company is considered to hold a controlling financial interest when it is able to exercise control over the investees’ operating and financial decisions. For variable interest entities (VIEs), the determination of which is based on the amount and characteristics of the entity’s equity, the Company is considered to hold a controlling financial interest when it is determined to be the primary beneficiary. A primary beneficiary is the party that has both: (1) the power to direct the activities that most significantly impact that VIE’s economic performance, and (2) the obligation to absorb the losses of, or the right to receive the benefits from, the VIE that could potentially be significant to that VIE. Entities in which the Company’s voting interest in common equity does not provide it with control, but allows the Company to exert significant influence over operating and financial decisions, are accounted for under the equity method. All other investments in equity securities, to the extent they are not considered marketable securities, are accounted for under the cost method.
Foreign Currency	Foreign Currency Monetary assets and liabilities denominated in foreign currencies are translated into U.S. dollars based upon exchange rates prevailing at the end of the reporting period; non-monetary assets and liabilities are translated at the historic exchange rate at the date of the transaction; revenues and expenses are translated at the average month-end exchange rates during the year. Resulting translation adjustments, along with any related qualifying hedge and tax effects, are included in accumulated other comprehensive income (loss) (AOCI), a component of shareholders’ equity. Translation adjustments, including qualifying hedge and tax effects, are reclassified to earnings upon the sale or substantial liquidation of investments in foreign operations. Gains and losses related to transactions in a currency other than the functional currency are reported net in Other expenses, in the Company’s Consolidated Statements of Income.
Amounts Based on Estimates and Assumptions	Amounts Based on Estimates and Assumptions Accounting estimates are an integral part of the Consolidated Financial Statements. These estimates are based, in part, on management’s assumptions concerning future events. Among the more significant assumptions are those that relate to reserves for Card Member losses on loans and receivables, the proprietary point liability for Membership Rewards costs, fair value measurements, goodwill and income taxes. These accounting estimates reflect the best judgment of management, but actual results could differ.
Total Revenues Net of Interest Expense	Discount Revenue Discount revenue generally represents the amount earned by the Company on transactions occurring at merchants with which the Company, or a Global Network Services (GNS) partner, has entered into a card acceptance agreement for facilitating transactions between the merchants and the Company’s Card Members. The amount of fees charged, or merchant discount, is generally deducted from the payment to the merchant and recorded as discount revenue at the time a Card Member enters into a point-of-sale transaction with a merchant. Net Card Fees Net card fees represent revenue earned from annual card membership fees, which vary based on the type of card and the number of cards for each account. These fees, net of acquisition costs and a reserve for projected refunds for Card Member cancellations, are deferred and recognized on a straight-line basis over the twelve-month card membership period as Net Card Fees in the Consolidated Statements of Income. The unamortized net card fee balance is reported in Other Liabilities on the Consolidated Balance Sheets (refer to Note 10). Other Fees and Commissions Other fees and commissions represent Card Member delinquency fees, foreign currency conversion fees, loyalty coalition-related fees, travel commissions and fees and service fees, which are primarily recognized in the period in which they are charged to the Card Member (refer to Note 19). In addition, service fees are also earned from other customers (e.g., merchants) for a variety of services and are recognized when the service is performed, which is generally in the period the fee is charged. Also included are fees related to the Company’s Membership Rewards program, which are deferred and recognized over the period covered by the fee, typically one year; the unamortized portion of which is included in Other Liabilities on the Consolidated Balance Sheets (refer to Note 10). Contra-revenue The Company regularly makes payments through contractual arrangements with merchants, corporate payments clients, Card Members, third-party issuing partners and certain other customers. These payments, including cash rebates and statement credits provided to Card Members, are generally classified as contra-revenue unless a specifically identifiable benefit (e.g., goods or services) is received by the Company or its Card Members in consideration for that payment, and the fair value of such benefit is determinable and measurable. If such conditions are met, then the payment is classified as expense up to the estimated fair value of the benefit. If no such benefit is identified, then the entire payment is classified as contra-revenue and included in the Consolidated Statements of Income in the revenue line item where the related transactions are recorded (e.g., Discount revenue or Other fees and commissions). Interest Income Interest on Card Member loans is assessed using the average daily balance method. Unless the loan is classified as non-accrual, interest is recognized based upon the principal amount outstanding, in accordance with the terms of the applicable account agreement, until the outstanding balance is paid, or written off. Interest and dividends on investment securities primarily relate to the Company’s performing fixed-income securities. Interest income is recognized as earned using the effective interest method, which adjusts the yield for security premiums and discounts, fees and other payments, so that a constant rate of return is recognized on the investment security’s outstanding balance. Amounts are recognized until securities are in default or when it becomes likely that future interest payments will not be made as scheduled. Interest on deposits with banks and other is recognized as earned, and primarily relates to the placement of cash, in excess of near-term funding requirements, in interest-bearing time deposits, overnight sweep accounts, and other interest-bearing demand and call accounts. Interest Expense Interest expense includes interest incurred primarily to fund Card Member loans and receivables, general corporate purposes and liquidity needs, and is recognized as incurred. Interest expense is divided principally into two categories: (i) deposits, which primarily relates to interest expense on deposits taken from customers and institutions, and (ii) debt, which primarily relates to interest expense on the Company’s long-term debt and short-term borrowings, as well as the realized impact of derivatives used to hedge interest rate risk on the Company’s long-term debt.
Marketing and Promotion Expenses	Marketing and promotion expense includes costs incurred in the development and initial placement of advertising, which are expensed in the year in which the advertising first takes place.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash and amounts due from banks, interest-bearing bank balances, including securities purchased under resale agreements, and other highly liquid investments with original maturities of 90 days or less.
Premises and Equipment	Premises and Equipment Premises and equipment, including leasehold improvements, are carried at cost less accumulated depreciation. Costs incurred during construction are capitalized and are depreciated once an asset is placed in service. Depreciation is generally computed using the straight-line method over the estimated useful lives of the assets, which range from 3 to 10 years for equipment, furniture and building improvements, and from 40 to 50 years for premises, which are depreciated based upon their estimated useful life at the acquisition date. Leasehold improvements are depreciated using the straight-line method over the lesser of the remaining term of the leased facility, or the economic life of the improvement, and ranges from 5 to 10 years. The Company maintains operating leases worldwide for facilities and equipment. Rent expense for facility leases is recognized ratably over the lease term, and includes adjustments for rent concessions, rent escalations and leasehold improvement allowances. The Company recognizes lease restoration obligations at the fair value of the restoration liabilities when incurred and amortizes the restoration assets over the lease term.
Software Development Costs	Certain costs associated with the acquisition or development of internal-use software are also capitalized and recorded in Premises and equipment. Once the software is ready for its intended use, these costs are amortized on a straight-line basis over the software’s estimated useful life, generally 5 years. The Company reviews these assets for impairment using the same impairment methodology used for its intangible assets.
Card Member and Other Receivables and Loans	Card Member and Other Loans Card Member loans are recorded at the time a Card Member enters into a point-of-sale transaction with a merchant and represent revolving amounts due on lending card products, as well as amounts due from charge Card Members who utilize the Pay Over Time features on their account and elect to revolve a portion of the outstanding balance by entering into a revolving payment arrangement with the Company. These loans have a range of terms such as credit limits, interest rates, fees and payment structures, which can be revised over time based on new information about Card Members, and in accordance with applicable regulations and the respective product’s terms and conditions. Card Members holding revolving loans are typically required to make monthly payments based on pre-established amounts and the amounts that Card Members choose to revolve are subject to finance charges. Card Member loans are presented on the Consolidated Balance Sheets net of reserves for losses (refer to Note 4), and include principal and any related accrued interest and fees. The Company’s policy generally is to cease accruing interest on a Card Member loan at the time the account is written off, and establish reserves for interest that the Company believes will not be collected. Card Member and Other Receivables Card Member receivables are also recorded at the time a Card Member enters into a point-of-sale transaction with a merchant and represent amounts due on charge card products. Each charge card transaction is authorized based on its likely economics, a Card Member’s most recent credit information and spend patterns. Additionally, global spend limits are established to limit the maximum exposure for the Company. Charge Card Members generally must pay the full amount billed each month. Card Member receivable balances are presented on the Consolidated Balance Sheets net of reserves for losses (refer to Note 4), and include principal and any related accrued fees. Impaired Card Member Loans and Receivables The Company considers impaired loans and receivables to include: (i) loans over 90 days past due still accruing interest, (ii) nonaccrual loans and (iii) loans and receivables modified as troubled debt restructurings (TDRs). Reserves for Card Member loans and receivables modified as TDRs are determined as the difference between the cash flows expected to be received from the Card Member (taking into consideration the probability of subsequent defaults), discounted at the original effective interest rates, and the carrying value of the related Card Member loan or receivables balance. The Company determines the original effective interest rate as the interest rate in effect prior to the imposition of any penalty interest rate. All changes in the impairment measurement are included in Provisions for losses in the Consolidated Statements of Income.
Reserves for Losses	Reserves for losses are primarily based upon statistical and analytical models that analyze portfolio performance and reflect management’s judgment regarding the quantitative components of the reserve. The models take into account several factors, including delinquency-based loss migration rates, loss emergence periods and average losses and recoveries over an appropriate historical period. Management considers whether to adjust the quantitative reserves for certain external and internal qualitative factors, which may increase or decrease the reserves for losses on Card Member loans and receivables. These external factors include employment, spend, sentiment, housing and credit, and changes in the legal and regulatory environment, while the internal factors include increased risk in certain portfolios, impact of risk management initiatives, changes in underwriting requirements and overall process stability. As part of this evaluation process, management also considers various reserve coverage metrics, such as reserves as a percentage of past due amounts, reserves as a percentage of Card Member loans or receivables, and net write-off coverage ratios. Card Member loans and receivables balances are written off when management considers amounts to be uncollectible, which is generally determined by the number of days past due and is typically no later than 180 days past due. Card Member loans and receivables in bankruptcy or owed by deceased individuals are generally written off upon notification, and recoveries are recognized as they are collected.
Investment Securities	Investment securities principally include debt securities the Company classifies as available-for-sale and carries at fair value on the Consolidated Balance Sheets, with unrealized gains and losses recorded in AOCI, net of income taxes. Realized gains and losses are recognized upon disposition of the securities using the specific identification method.
Asset Securitizations	The Company periodically securitizes Card Member loans and receivables arising from its card businesses through the transfer of those assets to securitization trusts. The trusts then issue debt securities collateralized by the transferred assets to third-party investors. Card Member loans are transferred to the American Express Credit Account Master Trust (the Lending Trust) and Card Member receivables are transferred to the American Express Issuance Trust II (the Charge Trust and together with the Lending Trust, the Trusts). The Trusts are consolidated by the Company. The Trusts are considered VIEs as they have insufficient equity at risk to finance their activities, which are to issue debt securities that are collateralized by the underlying Card Member loans and receivables. Refer to Note 1 for further details on the principles of consolidation. The Company performs the servicing and key decision making for the Trusts, and therefore has the power to direct the activities that most significantly impact the Trusts’ economic performance, which are the collection of the underlying Card Member loans and receivables. In addition, the Company holds all of the variable interests in both Trusts, with the exception of the debt securities issued to third-party investors. These variable interests held by the Company provide it with the right to receive benefits and the obligation to absorb losses, which could be significant to both the Lending Trust and the Charge Trust. Based on these considerations, the Company is the primary beneficiary of both Trusts and therefore consolidates both Trusts. The debt securities issued by the Trusts are non-recourse to the Company. The securitized Card Member loans and receivables held by the Lending Trust and the Charge Trust, respectively, are available only for payment of the debt securities or other obligations issued or arising in the securitization transactions (refer to Note 3). The long-term debt of each Trust is payable only out of collections on their respective underlying securitized assets (refer to Note 9).
Goodwill and Intangible Assets	Goodwill Goodwill represents the excess of acquisition cost of an acquired business over the fair value of assets acquired and liabilities assumed. The Company allocates goodwill to its reporting units for the purpose of impairment testing. A reporting unit is defined as an operating segment, or a business that is one level below an operating segment, for which discrete financial information is regularly reviewed by the operating segment manager. The Company evaluates goodwill for impairment annually as of June 30, or more frequently if events occur or circumstances change that would more likely than not reduce the fair value of one or more of the Company’s reporting units below its carrying value. Prior to completing the assessment of goodwill for impairment, the Company also performs a recoverability test of certain long-lived assets. The Company has the option to perform a qualitative assessment of goodwill impairment to determine whether it is more likely than not that the fair value of its reporting units is less than the carrying values. Alternatively, the Company performs a more detailed quantitative assessment of goodwill impairment. This qualitative assessment entails the evaluation of factors such as economic conditions, industry and market considerations, cost factors, overall financial performance of the reporting unit and other company and reporting unit-specific events. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, it then performs the impairment evaluation using the quantitative assessment. Under the quantitative assessment, the first step identifies whether there is a potential impairment by comparing the fair value of a reporting unit to the carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds the fair value, then a test is performed to determine the implied fair value of goodwill. An impairment loss is recognized based on the amount that the carrying amount of goodwill exceeds the implied fair value. When measuring the fair value of its reporting units in the quantitative assessment, the Company uses widely accepted valuation techniques, applying a combination of the income approach (discounted cash flows) and market approach (market multiples). When preparing discounted cash flow models under the income approach, the Company uses internal forecasts to estimate future cash flows expected to be generated by the reporting units. To discount these cash flows, the Company uses the expected cost of equity, determined by using a capital asset pricing model. The Company believes the discount rates used appropriately reflect the risks and uncertainties in the financial markets generally and specifically in the Company’s internally-developed forecasts. When using market multiples under the market approach, the Company applies comparable publicly traded companies’ multiples (e.g., earnings or revenues) to its reporting units’ actual results. For the year ended December 31, 2017, the Company performed a qualitative assessment and determined that it was more likely than not that the fair values of its reporting units exceeded their carrying values. For the year ended December 31, 2016, the Company performed the quantitative assessment for all of its reporting units and determined that there was no impairment of goodwill. Other Intangible Assets Intangible assets, primarily customer relationships, are amortized on a straight-line basis over their estimated useful lives of 1 to 22 years. The Company reviews long-lived assets and asset groups, including intangible assets, for impairment whenever events and circumstances indicate their carrying amounts may not be recoverable. An impairment is recognized if the carrying amount is not recoverable and exceeds the asset or asset group’s fair value. Intangible assets acquired in 2017 and 2016 are being amortized, on average, over 6 and 7 years, respectively.
Other Assets	The Company accounts for its tax credit investments, including Qualified Affordable Housing (QAH) investments, using the equity method of accounting.
Membership Rewards	Membership Rewards The Membership Rewards program allows enrolled Card Members to earn points that can be redeemed for a broad range of rewards including travel, shopping, gift cards, and covering eligible charges. The Company records a balance sheet liability that represents management’s best estimate of the cost of points earned that are expected to be redeemed in the future. The weighted average cost (WAC) per point and the Ultimate Redemption Rate (URR) are key assumptions used to estimate the Membership Rewards liability. The expense for Membership Rewards points is included in Card Member rewards expense. The Company periodically evaluates its liability estimation process and assumptions based on developments in redemption patterns, cost per point redeemed, partner contract changes and other factors.
Stock-based Compensation	The Company recognizes the cost of employee stock awards granted in exchange for employee services based on the grant-date fair value of the award, net of expected forfeitures. Those costs are recognized ratably over the vesting period. Effective January 1, 2017, the Company adopted new accounting guidance for employee share-based payments and accordingly, income tax benefits related to stock-based incentive arrangements were recognized in the Company’s Consolidated Statements of Income RSAs/RSUs are valued based on the stock price on the date of grant and contain either a) service conditions or b) both service and performance conditions. Certain employees are awarded PGs and other incentive awards that can be settled with cash or equity shares at the Company’s discretion, and final Compensation and Benefits Committee payout approval. These awards earn value based on performance, market and/or service conditions, and vest over periods of one to three years. PGs and other incentive awards are generally settled with cash and thus are classified as liabilities; therefore, the fair value is determined at the date of grant and remeasured quarterly as part of compensation expense over the vesting period.
Retirement Plans	The Company recognizes the funded status of its defined benefit pension plans and other postretirement benefit plans, measured as the difference between the fair value of the plan assets and the projected benefit obligation, in the Consolidated Balance Sheets.
Legal Contingencies	The Company has recorded reserves for certain of its outstanding legal proceedings. A reserve is recorded when it is both (a) probable that a loss has occurred and (b) the amount of loss can be reasonably estimated. There may be instances in which an exposure to loss exceeds the recorded reserve. The Company evaluates, on a quarterly basis, developments in legal proceedings that could cause an increase or decrease in the amount of the reserve that has been previously recorded, or a revision to the disclosed estimated range of possible losses, as applicable.
Derivatives Financial Instruments and Hedging Activities	The Company uses derivative financial instruments (derivatives) to manage exposures to various market risks. These instruments derive their value from an underlying variable or multiple variables, including interest rates, foreign exchange rates, and equity index or price, and are carried at fair value on the Consolidated Balance Sheets. The Company’s derivatives are carried at fair value on the Consolidated Balance Sheets. The accounting for changes in fair value depends on the instruments’ intended use and the resulting hedge designation, if any, as discussed below. The Company formally assesses, at inception of the hedge accounting relationship and on a quarterly basis, whether derivatives designated as hedges are highly effective in offsetting the fair value or cash flows of the hedged items. These assessments usually are made through the application of a regression analysis method. If it is determined that a derivative is not highly effective as a hedge, the Company will discontinue the application of hedge accounting. To the extent the fair value hedge is effective, the gain or loss on the hedging instrument offsets the loss or gain on the hedged item attributable to the hedged risk. Any difference between the changes in the fair value of the derivative and the changes in the hedged item is referred to as hedge ineffectiveness and is reported as a component of Other expenses. The Company primarily designates foreign currency derivatives, typically foreign exchange forwards, and on occasion foreign currency denominated debt, as hedges of net investments in certain foreign operations. The Company has derivatives that act as economic hedges, but are not designated as such for hedge accounting purposes. Foreign currency transactions from time to time may be partially or fully economically hedged through foreign currency contracts, primarily foreign exchange forwards. These hedges generally mature within one year. Foreign currency contracts involve the purchase and sale of designated currencies at an agreed upon rate for settlement on a specified date. The Company also has certain operating agreements containing payments that may be linked to a market rate or price, primarily foreign currency rates. The payment components of these agreements may meet the definition of an embedded derivative, in which case the embedded derivative is accounted for separately and is classified as a foreign exchange contract based on its primary risk exposure. The changes in the fair value of derivatives that are not designated as hedges are intended to offset the related foreign exchange gains or losses of the underlying foreign currency exposures.
Fair Value Measurements	The Company monitors the market conditions and evaluates the fair value hierarchy levels at least quarterly. For any transfers in and out of the levels of the fair value hierarchy, the Company discloses the fair value measurement at the beginning of the reporting period during which the transfer occurred.
Guarantees	Amounts related to the Company’s Card Member protection plans were included as of December 31, 2016, in addition to its real estate and business dispositions. The Company’s recognition of these instruments is at fair value. In addition, the Company establishes reserves when a loss is probable and the amount can be reasonably estimated.
Income Tax Uncertainties	The amount of benefit recognized for financial reporting purposes is based on management’s best judgment of the largest amount of benefit that is more likely than not to be realized on ultimate settlement with the taxing authority given the facts, circumstances and information available at the reporting date. The Company adjusts the level of unrecognized tax benefits when there is new information available to assess the likelihood of the outcome.
Income Taxes	The Tax Act, enacted by the U.S. government on December 22, 2017, makes broad and complex changes to the U.S. tax code which will require time to interpret. The SEC issued Staff Accounting Bulletin No. 118 (SAB 118) in December, 2017, to provide guidance on accounting for the effects of the Tax Act. SAB 118 provides for a measurement period of up to one year from the Tax Act enactment date for companies to complete their assessment of and accounting for those effects of the Tax Act required under ASC 740 “Implementation Guidance on Accounting for Uncertainty in Income Taxes” to be reported in the period of enactment. Under SAB 118, a company must first reflect the income tax effects of the Tax Act for which the accounting is complete in the period of the date of enactment. To the extent the accounting for other income tax effects is incomplete, but a reasonable estimate can be determined, companies must record a provisional estimate to be included in their financial statements. For any income tax effect for which a reasonable estimate cannot be determined, an entity must continue to apply ASC 740 based on the provisions of the tax laws in effect immediately prior to the Tax Act being enacted until such time as a reasonable estimate can be determined. The Company records a deferred income tax (benefit) provision when there are differences between assets and liabilities measured for financial reporting and for income tax return purposes. These temporary differences result in taxable or deductible amounts in future years and are measured using the tax rates and laws that will be in effect when such differences are expected to reverse. In particular, the 2017 balances were reduced to reflect the remeasurement of certain federal net deferred tax assets due to the enacted lower federal tax rate of 21 percent. A valuation allowance is established when management determines that it is more likely than not that all or some portion of the benefit of the deferred tax assets will not be realized. The valuation allowances as of December 31, 2017 and 2016 are associated with net operating losses and other deferred tax assets in certain non-U.S. operations of the Company. Interest and penalties relating to unrecognized tax benefits are reported in the income tax provision.
Regulatory Matters And Capital Adequacy [Policy Text Block]	Restricted Net Assets of Subsidiaries Certain of the Company’s subsidiaries are subject to restrictions on the transfer of net assets under debt agreements and regulatory requirements. These restrictions have not had any effect on the Company’s shareholder dividend policy and management does not anticipate any impact in the future. Procedures exist to transfer net assets between the Company and its subsidiaries, while ensuring compliance with the various contractual and regulatory constraints. Bank Holding Company Dividend Restrictions The Company is limited in its ability to pay dividends by the Federal Reserve, which could prohibit a dividend that would be considered an unsafe or unsound banking practice. It is the policy of the Federal Reserve that bank holding companies generally should pay dividends on preferred and common stock only out of net income available to common shareholders generated over the past year, and only if prospective earnings retention is consistent with the organization’s current and expected future capital needs, asset quality and overall financial condition. Moreover, bank holding companies are required by statute to be a source of strength to their insured depository institution subsidiaries and should not maintain dividend levels that undermine their ability to do so. On an annual basis, the Company is required to develop and maintain a capital plan, which includes planned dividends over a two-year horizon. The Company may be limited in its ability to pay dividends if the Federal Reserve objects to its capital plan. Banks’ Dividend Restrictions The Banks are limited in their ability to pay dividends by banking statutes, regulations and supervisory policy. In general, applicable federal and state banking laws prohibit, without first obtaining regulatory approval, insured depository institutions, such as Centurion Bank and American Express Bank from making dividend distributions if such distributions are not paid out of available retained earnings or would cause the institution to fail to meet capital adequacy standards. The Banks must maintain a capital conservation buffer (and countercyclical buffer if in effect). If the Banks’ risk-based capital ratios do not satisfy minimum requirements plus the combined capital conservation buffer (and the countercyclical capital buffer, if applicable), they will face graduated constraints on dividends and other capital distributions based on the amount of the shortfall. In determining the dividends to pay their parent, the Banks must also consider the effects on applicable risk-based capital and leverage ratio requirements, as well as policy statements of the federal regulatory agencies. In addition, the Banks’ banking regulators have authority to limit or prohibit the payment of a dividend by the Banks under a number of circumstances, including if, in the banking regulator’s opinion, payment of a dividend would constitute an unsafe or unsound banking practice in light of the financial condition of the banking organization.
Segment Reporting	The Company considers a combination of factors when evaluating the composition of its reportable operating segments, including the results reviewed by the chief operating decision maker, economic characteristics, products and services offered, classes of customers, product distribution channels, geographic considerations (primarily United States versus outside the United States), and regulatory environment considerations. Total Revenues Net of Interest Expense The Company allocates discount revenue and certain other revenues among segments using a transfer pricing methodology. Within the USCS, ICNS and GCS segments, discount revenue reflects the issuer component of the overall discount revenue generated by each segment’s Card Members; within the GMS segment, discount revenue reflects the network and acquirer component of the overall discount revenue. Net card fees and Other fees and commissions are directly attributable to the segment in which they are reported. Interest and fees on loans and certain investment income is directly attributable to the segment in which it is reported. Interest expense represents an allocated funding cost based on a combination of segment funding requirements and internal funding rates. Provisions for Losses The provisions for losses are directly attributable to the segment in which they are reported. Expenses Marketing and promotion expenses are included in each segment based on actual expenses incurred. Global brand advertising is primarily reflected in Corporate & Other and may be allocated to the segment based on the actual expense incurred. Rewards and Card Member services expenses are included in each segment based on the actual expenses incurred within the segment. Salaries and employee benefits and other operating expenses includes expenses such as professional services, occupancy and equipment and communications incurred directly within each segment. In addition, expenses related to support services, such as technology costs, are allocated to each segment primarily based on support service activities directly attributable to the segment. Other overhead expenses, such as staff group support functions, are allocated from Corporate & Other to the other segments based on a mix of each segment’s direct consumption of services and relative level of pretax income. Income Taxes An income tax provision (benefit) is allocated to each business segment based on the effective tax rates applicable to various businesses that comprise the segment.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

The Consolidated Financial Statements of the Company are prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Significant intercompany transactions are eliminated.

The Company consolidates entities in which it holds a “controlling financial interest.” For voting interest entities, the Company is considered to hold a controlling financial interest when it is able to exercise control over the investees’ operating and financial decisions. For variable interest entities (VIEs), the determination of which is based on the amount and characteristics of the entity’s equity, the Company is considered to hold a controlling financial interest when it is determined to be the primary beneficiary. A primary beneficiary is the party that has both: (1) the power to direct the activities that most significantly impact that VIE’s economic performance, and (2) the obligation to absorb the losses of, or the right to receive the benefits from, the VIE that could potentially be significant to that VIE.

Entities in which the Company’s voting interest in common equity does not provide it with control, but allows the Company to exert significant influence over operating and financial decisions, are accounted for under the equity method. All other investments in equity securities, to the extent they are not considered marketable securities, are accounted for under the cost method.

Foreign Currency

Monetary assets and liabilities denominated in foreign currencies are translated into U.S. dollars based upon exchange rates prevailing at the end of the reporting period; non-monetary assets and liabilities are translated at the historic exchange rate at the date of the transaction; revenues and expenses are translated at the average month-end exchange rates during the year. Resulting translation adjustments, along with any related qualifying hedge and tax effects, are included in accumulated other comprehensive income (loss) (AOCI), a component of shareholders’ equity. Translation adjustments, including qualifying hedge and tax effects, are reclassified to earnings upon the sale or substantial liquidation of investments in foreign operations. Gains and losses related to transactions in a currency other than the functional currency are reported net in Other expenses, in the Company’s Consolidated Statements of Income.

Amounts Based on Estimates and Assumptions

Accounting estimates are an integral part of the Consolidated Financial Statements. These estimates are based, in part, on management’s assumptions concerning future events. Among the more significant assumptions are those that relate to reserves for Card Member losses on loans and receivables, the proprietary point liability for Membership Rewards costs, fair value measurements, goodwill and income taxes. These accounting estimates reflect the best judgment of management, but actual results could differ.

Total Revenues Net of Interest Expense

Discount Revenue

Discount revenue generally represents the amount earned by the Company on transactions occurring at merchants with which the Company, or a Global Network Services (GNS) partner, has entered into a card acceptance agreement for facilitating transactions between the merchants and the Company’s Card Members. The amount of fees charged, or merchant discount, is generally deducted from the payment to the merchant and recorded as discount revenue at the time a Card Member enters into a point-of-sale transaction with a merchant.

Net Card Fees

Net card fees represent revenue earned from annual card membership fees, which vary based on the type of card and the number of cards for each account. These fees, net of acquisition costs and a reserve for projected refunds for Card Member cancellations, are deferred and recognized on a straight-line basis over the twelve-month card membership period as Net Card Fees in the Consolidated Statements of Income. The unamortized net card fee balance is reported in Other Liabilities on the Consolidated Balance Sheets (refer to Note 10).

Other Fees and Commissions

Other fees and commissions represent Card Member delinquency fees, foreign currency conversion fees, loyalty coalition-related fees, travel commissions and fees and service fees, which are primarily recognized in the period in which they are charged to the Card Member (refer to Note 19). In addition, service fees are also earned from other customers (e.g., merchants) for a variety of services and are recognized when the service is performed, which is generally in the period the fee is charged. Also included are fees related to the Company’s Membership Rewards program, which are deferred and recognized over the period covered by the fee, typically one year; the unamortized portion of which is included in Other Liabilities on the Consolidated Balance Sheets (refer to Note 10).

Contra-revenue

The Company regularly makes payments through contractual arrangements with merchants, corporate payments clients, Card Members, third-party issuing partners and certain other customers. These payments, including cash rebates and statement credits provided to Card Members, are generally classified as contra-revenue unless a specifically identifiable benefit (e.g., goods or services) is received by the Company or its Card Members in consideration for that payment, and the fair value of such benefit is determinable and measurable. If such conditions are met, then the payment is classified as expense up to the estimated fair value of the benefit. If no such benefit is identified, then the entire payment is classified as contra-revenue and included in the Consolidated Statements of Income in the revenue line item where the related transactions are recorded (e.g., Discount revenue or Other fees and commissions).

Interest Income

Interest on Card Member loans is assessed using the average daily balance method. Unless the loan is classified as non-accrual, interest is recognized based upon the principal amount outstanding, in accordance with the terms of the applicable account agreement, until the outstanding balance is paid, or written off.

Interest and dividends on investment securities primarily relate to the Company’s performing fixed-income securities. Interest income is recognized as earned using the effective interest method, which adjusts the yield for security premiums and discounts, fees and other payments, so that a constant rate of return is recognized on the investment security’s outstanding balance. Amounts are recognized until securities are in default or when it becomes likely that future interest payments will not be made as scheduled.

Interest on deposits with banks and other is recognized as earned, and primarily relates to the placement of cash, in excess of near-term funding requirements, in interest-bearing time deposits, overnight sweep accounts, and other interest-bearing demand and call accounts.

Interest Expense

Interest expense includes interest incurred primarily to fund Card Member loans and receivables, general corporate purposes and liquidity needs, and is recognized as incurred. Interest expense is divided principally into two categories: (i) deposits, which primarily relates to interest expense on deposits taken from customers and institutions, and (ii) debt, which primarily relates to interest expense on the Company’s long-term debt and short-term borrowings, as well as the realized impact of derivatives used to hedge interest rate risk on the Company’s long-term debt.

Marketing and Promotion Expenses

Marketing and promotion expense includes costs incurred in the development and initial placement of advertising, which are expensed in the year in which the advertising first takes place.

Cash and Cash Equivalents

Cash and cash equivalents include cash and amounts due from banks, interest-bearing bank balances, including securities purchased under resale agreements, and other highly liquid investments with original maturities of 90 days or less.

Premises and Equipment

Premises and equipment, including leasehold improvements, are carried at cost less accumulated depreciation. Costs incurred during construction are capitalized and are depreciated once an asset is placed in service. Depreciation is generally computed using the straight-line method over the estimated useful lives of the assets, which range from 3 to 10 years for equipment, furniture and building improvements, and from 40 to 50 years for premises, which are depreciated based upon their estimated useful life at the acquisition date.

Leasehold improvements are depreciated using the straight-line method over the lesser of the remaining term of the leased facility, or the economic life of the improvement, and ranges from 5 to 10 years. The Company maintains operating leases worldwide for facilities and equipment. Rent expense for facility leases is recognized ratably over the lease term, and includes adjustments for rent concessions, rent escalations and leasehold improvement allowances. The Company recognizes lease restoration obligations at the fair value of the restoration liabilities when incurred and amortizes the restoration assets over the lease term.

Software Development Costs

Certain costs associated with the acquisition or development of internal-use software are also capitalized and recorded in Premises and equipment. Once the software is ready for its intended use, these costs are amortized on a straight-line basis over the software’s estimated useful life, generally 5 years. The Company reviews these assets for impairment using the same impairment methodology used for its intangible assets.

Card Member and Other Receivables and Loans

Card Member and Other Loans

Card Member loans are recorded at the time a Card Member enters into a point-of-sale transaction with a merchant and represent revolving amounts due on lending card products, as well as amounts due from charge Card Members who utilize the Pay Over Time features on their account and elect to revolve a portion of the outstanding balance by entering into a revolving payment arrangement with the Company. These loans have a range of terms such as credit limits, interest rates, fees and payment structures, which can be revised over time based on new information about Card Members, and in accordance with applicable regulations and the respective product’s terms and conditions. Card Members holding revolving loans are typically required to make monthly payments based on pre-established amounts and the amounts that Card Members choose to revolve are subject to finance charges.

Card Member loans are presented on the Consolidated Balance Sheets net of reserves for losses (refer to Note 4), and include principal and any related accrued interest and fees. The Company’s policy generally is to cease accruing interest on a Card Member loan at the time the account is written off, and establish reserves for interest that the Company believes will not be collected.

Card Member and Other Receivables

Card Member receivables are also recorded at the time a Card Member enters into a point-of-sale transaction with a merchant and represent amounts due on charge card products. Each charge card transaction is authorized based on its likely economics, a Card Member’s most recent credit information and spend patterns. Additionally, global spend limits are established to limit the maximum exposure for the Company.

Charge Card Members generally must pay the full amount billed each month. Card Member receivable balances are presented on the Consolidated Balance Sheets net of reserves for losses (refer to Note 4), and include principal and any related accrued fees.

Impaired Card Member Loans and Receivables

The Company considers impaired loans and receivables to include: (i) loans over 90 days past due still accruing interest, (ii) nonaccrual loans and (iii) loans and receivables modified as troubled debt restructurings (TDRs).

Reserves for Card Member loans and receivables modified as TDRs are determined as the difference between the cash flows expected to be received from the Card Member (taking into consideration the probability of subsequent defaults), discounted at the original effective interest rates, and the carrying value of the related Card Member loan or receivables balance. The Company determines the original effective interest rate as the interest rate in effect prior to the imposition of any penalty interest rate. All changes in the impairment measurement are included in Provisions for losses in the Consolidated Statements of Income.

Reserves for Losses

Reserves for losses are primarily based upon statistical and analytical models that analyze portfolio performance and reflect management’s judgment regarding the quantitative components of the reserve. The models take into account several factors, including delinquency-based loss migration rates, loss emergence periods and average losses and recoveries over an appropriate historical period. Management considers whether to adjust the quantitative reserves for certain external and internal qualitative factors, which may increase or decrease the reserves for losses on Card Member loans and receivables. These external factors include employment, spend, sentiment, housing and credit, and changes in the legal and regulatory environment, while the internal factors include increased risk in certain portfolios, impact of risk management initiatives, changes in underwriting requirements and overall process stability. As part of this evaluation process, management also considers various reserve coverage metrics, such as reserves as a percentage of past due amounts, reserves as a percentage of Card Member loans or receivables, and net write-off coverage ratios.

Card Member loans and receivables balances are written off when management considers amounts to be uncollectible, which is generally determined by the number of days past due and is typically no later than 180 days past due. Card Member loans and receivables in bankruptcy or owed by deceased individuals are generally written off upon notification, and recoveries are recognized as they are collected.

Investment Securities

Investment securities principally include debt securities the Company classifies as available-for-sale and carries at fair value on the Consolidated Balance Sheets, with unrealized gains and losses recorded in AOCI, net of income taxes. Realized gains and losses are recognized upon disposition of the securities using the specific identification method.

Asset Securitizations

The Company periodically securitizes Card Member loans and receivables arising from its card businesses through the transfer of those assets to securitization trusts. The trusts then issue debt securities collateralized by the transferred assets to third-party investors.

Card Member loans are transferred to the American Express Credit Account Master Trust (the Lending Trust) and Card Member receivables are transferred to the American Express Issuance Trust II (the Charge Trust and together with the Lending Trust, the Trusts). The Trusts are consolidated by the Company. The Trusts are considered VIEs as they have insufficient equity at risk to finance their activities, which are to issue debt securities that are collateralized by the underlying Card Member loans and receivables. Refer to Note 1 for further details on the principles of consolidation.

The Company performs the servicing and key decision making for the Trusts, and therefore has the power to direct the activities that most significantly impact the Trusts’ economic performance, which are the collection of the underlying Card Member loans and receivables. In addition, the Company holds all of the variable interests in both Trusts, with the exception of the debt securities issued to third-party investors.

These variable interests held by the Company provide it with the right to receive benefits and the obligation to absorb losses, which could be significant to both the Lending Trust and the Charge Trust. Based on these considerations, the Company is the primary beneficiary of both Trusts and therefore consolidates both Trusts.

The debt securities issued by the Trusts are non-recourse to the Company. The securitized Card Member loans and receivables held by the Lending Trust and the Charge Trust, respectively, are available only for payment of the debt securities or other obligations issued or arising in the securitization transactions (refer to Note 3). The long-term debt of each Trust is payable only out of collections on their respective underlying securitized assets (refer to Note 9).

Goodwill and Intangible Assets

Goodwill

Goodwill represents the excess of acquisition cost of an acquired business over the fair value of assets acquired and liabilities assumed. The Company allocates goodwill to its reporting units for the purpose of impairment testing. A reporting unit is defined as an operating segment, or a business that is one level below an operating segment, for which discrete financial information is regularly reviewed by the operating segment manager.

The Company evaluates goodwill for impairment annually as of June 30, or more frequently if events occur or circumstances change that would more likely than not reduce the fair value of one or more of the Company’s reporting units below its carrying value. Prior to completing the assessment of goodwill for impairment, the Company also performs a recoverability test of certain long-lived assets. The Company has the option to perform a qualitative assessment of goodwill impairment to determine whether it is more likely than not that the fair value of its reporting units is less than the carrying values. Alternatively, the Company performs a more detailed quantitative assessment of goodwill impairment.

This qualitative assessment entails the evaluation of factors such as economic conditions, industry and market considerations, cost factors, overall financial performance of the reporting unit and other company and reporting unit-specific events. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, it then performs the impairment evaluation using the quantitative assessment.

Under the quantitative assessment, the first step identifies whether there is a potential impairment by comparing the fair value of a reporting unit to the carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds the fair value, then a test is performed to determine the implied fair value of goodwill. An impairment loss is recognized based on the amount that the carrying amount of goodwill exceeds the implied fair value.

When measuring the fair value of its reporting units in the quantitative assessment, the Company uses widely accepted valuation techniques, applying a combination of the income approach (discounted cash flows) and market approach (market multiples). When preparing discounted cash flow models under the income approach, the Company uses internal forecasts to estimate future cash flows expected to be generated by the reporting units. To discount these cash flows, the Company uses the expected cost of equity, determined by using a capital asset pricing model. The Company believes the discount rates used appropriately reflect the risks and uncertainties in the financial markets generally and specifically in the Company’s internally-developed forecasts. When using market multiples under the market approach, the Company applies comparable publicly traded companies’ multiples (e.g., earnings or revenues) to its reporting units’ actual results.

For the year ended December 31, 2017, the Company performed a qualitative assessment and determined that it was more likely than not that the fair values of its reporting units exceeded their carrying values. For the year ended December 31, 2016, the Company performed the quantitative assessment for all of its reporting units and determined that there was no impairment of goodwill.

Other Intangible Assets

Intangible assets, primarily customer relationships, are amortized on a straight-line basis over their estimated useful lives of 1 to 22 years. The Company reviews long-lived assets and asset groups, including intangible assets, for impairment whenever events and circumstances indicate their carrying amounts may not be recoverable. An impairment is recognized if the carrying amount is not recoverable and exceeds the asset or asset group’s fair value.

Intangible assets acquired in 2017 and 2016 are being amortized, on average, over 6 and 7 years, respectively.

Other Assets

The Company accounts for its tax credit investments, including Qualified Affordable Housing (QAH) investments, using the equity method of accounting.

Membership Rewards

The Membership Rewards program allows enrolled Card Members to earn points that can be redeemed for a broad range of rewards including travel, shopping, gift cards, and covering eligible charges. The Company records a balance sheet liability that represents management’s best estimate of the cost of points earned that are expected to be redeemed in the future. The weighted average cost (WAC) per point and the Ultimate Redemption Rate (URR) are key assumptions used to estimate the Membership Rewards liability.

The expense for Membership Rewards points is included in Card Member rewards expense. The Company periodically evaluates its liability estimation process and assumptions based on developments in redemption patterns, cost per point redeemed, partner contract changes and other factors.

Stock-based Compensation

The Company recognizes the cost of employee stock awards granted in exchange for employee services based on the grant-date fair value of the award, net of expected forfeitures. Those costs are recognized ratably over the vesting period.

Effective January 1, 2017, the Company adopted new accounting guidance for employee share-based payments and accordingly, income tax benefits related to stock-based incentive arrangements were recognized in the Company’s Consolidated Statements of Income

RSAs/RSUs are valued based on the stock price on the date of grant and contain either a) service conditions or b) both service and performance conditions.

Certain employees are awarded PGs and other incentive awards that can be settled with cash or equity shares at the Company’s discretion, and final Compensation and Benefits Committee payout approval. These awards earn value based on performance, market and/or service conditions, and vest over periods of one to three years.

PGs and other incentive awards are generally settled with cash and thus are classified as liabilities; therefore, the fair value is determined at the date of grant and remeasured quarterly as part of compensation expense over the vesting period.

Retirement Plans

The Company recognizes the funded status of its defined benefit pension plans and other postretirement benefit plans, measured as the difference between the fair value of the plan assets and the projected benefit obligation, in the Consolidated Balance Sheets.

Legal Contingencies

The Company has recorded reserves for certain of its outstanding legal proceedings. A reserve is recorded when it is both (a) probable that a loss has occurred and (b) the amount of loss can be reasonably estimated. There may be instances in which an exposure to loss exceeds the recorded reserve. The Company evaluates, on a quarterly basis, developments in legal proceedings that could cause an increase or decrease in the amount of the reserve that has been previously recorded, or a revision to the disclosed estimated range of possible losses, as applicable.

Derivatives Financial Instruments and Hedging Activities

The Company uses derivative financial instruments (derivatives) to manage exposures to various market risks. These instruments derive their value from an underlying variable or multiple variables, including interest rates, foreign exchange rates, and equity index or price, and are carried at fair value on the Consolidated Balance Sheets.

The Company’s derivatives are carried at fair value on the Consolidated Balance Sheets. The accounting for changes in fair value depends on the instruments’ intended use and the resulting hedge designation, if any, as discussed below.

The Company formally assesses, at inception of the hedge accounting relationship and on a quarterly basis, whether derivatives designated as hedges are highly effective in offsetting the fair value or cash flows of the hedged items. These assessments usually are made through the application of a regression analysis method. If it is determined that a derivative is not highly effective as a hedge, the Company will discontinue the application of hedge accounting.

To the extent the fair value hedge is effective, the gain or loss on the hedging instrument offsets the loss or gain on the hedged item attributable to the hedged risk. Any difference between the changes in the fair value of the derivative and the changes in the hedged item is referred to as hedge ineffectiveness and is reported as a component of Other expenses.

The Company primarily designates foreign currency derivatives, typically foreign exchange forwards, and on occasion foreign currency denominated debt, as hedges of net investments in certain foreign operations.

The Company has derivatives that act as economic hedges, but are not designated as such for hedge accounting purposes. Foreign currency transactions from time to time may be partially or fully economically hedged through foreign currency contracts, primarily foreign exchange forwards. These hedges generally mature within one year. Foreign currency contracts involve the purchase and sale of designated currencies at an agreed upon rate for settlement on a specified date.

The Company also has certain operating agreements containing payments that may be linked to a market rate or price, primarily foreign currency rates. The payment components of these agreements may meet the definition of an embedded derivative, in which case the embedded derivative is accounted for separately and is classified as a foreign exchange contract based on its primary risk exposure.

The changes in the fair value of derivatives that are not designated as hedges are intended to offset the related foreign exchange gains or losses of the underlying foreign currency exposures.

Fair Value Measurements

The Company monitors the market conditions and evaluates the fair value hierarchy levels at least quarterly. For any transfers in and out of the levels of the fair value hierarchy, the Company discloses the fair value measurement at the beginning of the reporting period during which the transfer occurred.

Guarantees

Amounts related to the Company’s Card Member protection plans were included as of December 31, 2016, in addition to its real estate and business dispositions.

The Company’s recognition of these instruments is at fair value. In addition, the Company establishes reserves when a loss is probable and the amount can be reasonably estimated.

Income Tax Uncertainties

The amount of benefit recognized for financial reporting purposes is based on management’s best judgment of the largest amount of benefit that is more likely than not to be realized on ultimate settlement with the taxing authority given the facts, circumstances and information available at the reporting date. The Company adjusts the level of unrecognized tax benefits when there is new information available to assess the likelihood of the outcome.

Income Taxes

The Tax Act, enacted by the U.S. government on December 22, 2017, makes broad and complex changes to the U.S. tax code which will require time to interpret. The SEC issued Staff Accounting Bulletin No. 118 (SAB 118) in December, 2017, to provide guidance on accounting for the effects of the Tax Act. SAB 118 provides for a measurement period of up to one year from the Tax Act enactment date for companies to complete their assessment of and accounting for those effects of the Tax Act required under ASC 740 “Implementation Guidance on Accounting for Uncertainty in Income Taxes” to be reported in the period of enactment. Under SAB 118, a company must first reflect the income tax effects of the Tax Act for which the accounting is complete in the period of the date of enactment. To the extent the accounting for other income tax effects is incomplete, but a reasonable estimate can be determined, companies must record a provisional estimate to be included in their financial statements. For any income tax effect for which a reasonable estimate cannot be determined, an entity must continue to apply ASC 740 based on the provisions of the tax laws in effect immediately prior to the Tax Act being enacted until such time as a reasonable estimate can be determined.

The Company records a deferred income tax (benefit) provision when there are differences between assets and liabilities measured for financial reporting and for income tax return purposes. These temporary differences result in taxable or deductible amounts in future years and are measured using the tax rates and laws that will be in effect when such differences are expected to reverse. In particular, the 2017 balances were reduced to reflect the remeasurement of certain federal net deferred tax assets due to the enacted lower federal tax rate of 21 percent.

A valuation allowance is established when management determines that it is more likely than not that all or some portion of the benefit of the deferred tax assets will not be realized. The valuation allowances as of December 31, 2017 and 2016 are associated with net operating losses and other deferred tax assets in certain non-U.S. operations of the Company.

Interest and penalties relating to unrecognized tax benefits are reported in the income tax provision.

Regulatory Matters And Capital Adequacy [Policy Text Block]

Restricted Net Assets of Subsidiaries

Certain of the Company’s subsidiaries are subject to restrictions on the transfer of net assets under debt agreements and regulatory requirements. These restrictions have not had any effect on the Company’s shareholder dividend policy and management does not anticipate any impact in the future. Procedures exist to transfer net assets between the Company and its subsidiaries, while ensuring compliance with the various contractual and regulatory constraints.

Bank Holding Company Dividend Restrictions

The Company is limited in its ability to pay dividends by the Federal Reserve, which could prohibit a dividend that would be considered an unsafe or unsound banking practice. It is the policy of the Federal Reserve that bank holding companies generally should pay dividends on preferred and common stock only out of net income available to common shareholders generated over the past year, and only if prospective earnings retention is consistent with the organization’s current and expected future capital needs, asset quality and overall financial condition. Moreover, bank holding companies are required by statute to be a source of strength to their insured depository institution subsidiaries and should not maintain dividend levels that undermine their ability to do so. On an annual basis, the Company is required to develop and maintain a capital plan, which includes planned dividends over a two-year horizon. The Company may be limited in its ability to pay dividends if the Federal Reserve objects to its capital plan.

Banks’ Dividend Restrictions

The Banks are limited in their ability to pay dividends by banking statutes, regulations and supervisory policy. In general, applicable federal and state banking laws prohibit, without first obtaining regulatory approval, insured depository institutions, such as Centurion Bank and American Express Bank from making dividend distributions if such distributions are not paid out of available retained earnings or would cause the institution to fail to meet capital adequacy standards. The Banks must maintain a capital conservation buffer (and countercyclical buffer if in effect). If the Banks’ risk-based capital ratios do not satisfy minimum requirements plus the combined capital conservation buffer (and the countercyclical capital buffer, if applicable), they will face graduated constraints on dividends and other capital distributions based on the amount of the shortfall.

In determining the dividends to pay their parent, the Banks must also consider the effects on applicable risk-based capital and leverage ratio requirements, as well as policy statements of the federal regulatory agencies. In addition, the Banks’ banking regulators have authority to limit or prohibit the payment of a dividend by the Banks under a number of circumstances, including if, in the banking regulator’s opinion, payment of a dividend would constitute an unsafe or unsound banking practice in light of the financial condition of the banking organization.

Segment Reporting

The Company considers a combination of factors when evaluating the composition of its reportable operating segments, including the results reviewed by the chief operating decision maker, economic characteristics, products and services offered, classes of customers, product distribution channels, geographic considerations (primarily United States versus outside the United States), and regulatory environment considerations.

Total Revenues Net of Interest Expense

The Company allocates discount revenue and certain other revenues among segments using a transfer pricing methodology. Within the USCS, ICNS and GCS segments, discount revenue reflects the issuer component of the overall discount revenue generated by each segment’s Card Members; within the GMS segment, discount revenue reflects the network and acquirer component of the overall discount revenue. Net card fees and Other fees and commissions are directly attributable to the segment in which they are reported.

Interest and fees on loans and certain investment income is directly attributable to the segment in which it is reported. Interest expense represents an allocated funding cost based on a combination of segment funding requirements and internal funding rates.

Provisions for Losses

The provisions for losses are directly attributable to the segment in which they are reported.

Expenses

Marketing and promotion expenses are included in each segment based on actual expenses incurred. Global brand advertising is primarily reflected in Corporate & Other and may be allocated to the segment based on the actual expense incurred. Rewards and Card Member services expenses are included in each segment based on the actual expenses incurred within the segment.

Salaries and employee benefits and other operating expenses includes expenses such as professional services, occupancy and equipment and communications incurred directly within each segment. In addition, expenses related to support services, such as technology costs, are allocated to each segment primarily based on support service activities directly attributable to the segment. Other overhead expenses, such as staff group support functions, are allocated from Corporate & Other to the other segments based on a mix of each segment’s direct consumption of services and relative level of pretax income.

Income Taxes

An income tax provision (benefit) is allocated to each business segment based on the effective tax rates applicable to various businesses that comprise the segment.