United Parcel Service (UPS) 10-Q 3 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 24, 2018
Entity Registrant Name	UNITED PARCEL SERVICE INC
Trading Symbol	UPS
Entity Central Index Key	1,090,727
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A common stock
Entity Common Stock, Shares Outstanding		172,128,615
Class B common stock
Entity Common Stock, Shares Outstanding		689,559,566

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 3,544	$ 3,320
Marketable securities	665	749
Accounts receivable, net	7,606	8,773
Current income taxes receivable	288	1,573
Other current assets	1,517	1,303
Total Current Assets	13,620	15,718
Property, Plant and Equipment, Net	23,239	22,118
Goodwill	3,893	3,872
Intangible Assets, Net	2,025	1,964
Non-Current Investments and Restricted Cash	311	483
Deferred Income Tax Assets	264	266
Other Non-Current Assets	1,112	1,153
Total Assets	44,464	45,574
Current Liabilities:
Current maturities of long-term debt and commercial paper	2,683	4,011
Accounts payable	3,501	3,934
Accrued wages and withholdings	2,523	2,608
Self-insurance reserves	732	705
Accrued group welfare and retirement plan contributions	646	677
Other current liabilities	1,064	951
Total Current Liabilities	11,149	12,886
Long-Term Debt	20,409	20,278
Pension and Postretirement Benefit Obligations	7,053	7,061
Deferred Income Tax Liabilities	837	756
Self-Insurance Reserves	1,729	1,765
Other Non-Current Liabilities	1,912	1,804
Shareowners' Equity:
Additional paid-in capital	0	0
Retained earnings	6,973	5,852
Accumulated other comprehensive loss	(5,638)	(4,867)
Deferred compensation obligations	31	37
Less: Treasury stock (1 share in 2018 and 2017)	(31)	(37)
Total Equity for Controlling Interests	1,344	994
Noncontrolling Interests	31	30
Total Shareowners’ Equity	1,375	1,024
Total Liabilities and Shareowners’ Equity	44,464	45,574
Common Class A [Member]
Shareowners' Equity:
Common stock	2	2
Total Equity for Controlling Interests	2	2
Common Class B [Member]
Shareowners' Equity:
Common stock	7	7
Total Equity for Controlling Interests	$ 7	$ 7

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares shares in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Treasury stock, shares	1	1
Class A common stock
Common stock, shares issued	174	173	180	180
Class B common stock
Common stock, shares issued	689	687	689	689

STATEMENTS OF CONSOLIDATED INCO

STATEMENTS OF CONSOLIDATED INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue	$ 17,113	$ 15,510
Operating Expenses:
Compensation and benefits	9,045	8,311
Repairs and maintenance	434	390
Depreciation and amortization	596	554
Purchased transportation	3,145	2,545
Fuel	750	621
Other occupancy	361	299
Other expenses	1,262	1,173
Total Operating Expenses	15,593	13,893
Operating Profit	1,520	1,617
Other Income and (Expense):
Investment income and other	294	195
Interest expense	(153)	(102)
Total Other Income and (Expense)	141	93
Income Before Income Taxes	1,661	1,710
Income Tax Expense	316	544
Net Income	$ 1,345	$ 1,166
Basic Earnings Per Share	$ 1.55	$ 1.33
Diluted Earnings Per Share	$ 1.55	$ 1.33

STATEMENTS OF CONSOLIDATED COMP

STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,345	$ 1,166
Change in foreign currency translation adjustment, net of tax	(6)	30
Change in unrealized gain (loss) on marketable securities, net of tax	(3)	0
Change in unrealized gain (loss) on cash flow hedges, net of tax	(66)	(41)
Change in unrecognized pension and postretirement benefit costs, net of tax	39	32
Comprehensive Income	$ 1,309	$ 1,187

STATEMENTS OF CONSOLIDATED CASH

STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows From Operating Activities:
Net Income	$ 1,345	$ 1,166
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	596	554
Pension and postretirement benefit expense	154	232
Pension and postretirement benefit contributions	(44)	(2,489)
Self-insurance reserves	(11)	(60)
Deferred tax (benefit) expense	106	99
Stock compensation expense	239	212
Other (gains) losses	71	9
Changes in assets and liabilities, net of effects of business acquisitions:
Accounts receivable	1,201	1,134
Other assets	1,100	383
Accounts payable	(601)	(673)
Accrued wages and withholdings	(67)	(34)
Other liabilities	(24)	(274)
Other liabilities	2	(20)
Net cash from operating activities	4,067	239
Cash Flows From Investing Activities:
Capital expenditures	(1,537)	(938)
Proceeds from disposals of property, plant and equipment	20	11
Purchases of marketable securities	(177)	(509)
Sales and maturities of marketable securities	246	556
Net (increase) decrease in finance receivables	0	(11)
Cash paid for business acquisitions, net of cash and cash equivalents acquired	0	(25)
Other investing activities	2	6
Net cash used in investing activities	(1,446)	(910)
Cash Flows From Financing Activities:
Net change in short-term debt	165	562
Proceeds from long-term borrowings	159	1,072
Repayments of long-term borrowings	(1,656)	(503)
Purchases of common stock	(261)	(438)
Issuances of common stock	77	74
Dividends	(754)	(695)
Other financing activities	(280)	(196)
Net cash used in financing activities	(2,550)	(124)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	(14)	16
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	57	(779)
Cash, Cash Equivalents and Restricted Cash:
Beginning of period	3,769	3,921
End of period	$ 3,826	$ 3,142

BASIS OF PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION AND ACCOUNTING POLICIES Principles of Consolidation In our opinion, the accompanying interim, unaudited, consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. These consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly our financial position as of March 31, 2018 , our results of operations for the three months ended March 31, 2018 and 2017 , and cash flows for the three months ended March 31, 2018 and 2017 . The results reported in these consolidated financial statements should not be regarded as necessarily indicative of results that may be expected for any other period or the entire year. The interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017 . For interim consolidated financial statement purposes, we provide for accruals under our various employee benefit plans for each three month period based on one quarter of the estimated annual expense. Certain prior year amounts have been reclassified to conform to the current year presentation. These reclassifications had no material impact on our financial position or results of operations. Fair Value of Financial Instruments The carrying amounts of our cash and cash equivalents, accounts receivable, finance receivables and accounts payable approximate fair value as of March 31, 2018 . The fair values of our investment securities are disclosed in note 5 , our recognized multiemployer pension withdrawal liabilities in note 7 , our short and long-term debt in note 9 and our derivative instruments in note 14 . We utilized Level 1 inputs in the fair value hierarchy of valuation techniques to determine the fair value of our cash and cash equivalents, and Level 2 inputs to determine the fair value of our accounts receivable, finance receivables and accounts payable. Accounting Estimates The preparation of the accompanying interim, unaudited, consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingencies at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Estimates have been prepared on the basis of the most current and best information and actual results could differ materially from those estimates.

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	3 Months Ended
	Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS Adoption of New Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued an accounting standards update ("ASU") that changes the revenue recognition for companies that enter into contracts with customers to transfer goods or services (" Revenue from Contracts with Customers") . The standard is a comprehensive new revenue recognition model that requires revenue to be recognized in a manner depicting the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. The FASB has also issued a number of updates to this standard. Effective January 1, 2018, we adopted the requirements of this ASU using the full retrospective method. See note 3 for required disclosures pertaining to the new ASU. In November 2016, the FASB issued an ASU that is intended to reduce diversity in practice by adding or clarifying guidance on classification and presentation of changes in restricted cash on the statement of cash flows (" Restricted Cash") . As a result of this update, restricted cash is included within cash and cash equivalents on our statements of consolidated cash flows. Effective January 1, 2018, we adopted the requirements of this ASU retrospectively. In March 2017, the FASB issued an ASU to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost (" Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost") . The update requires employers to report the current service cost component in the same line item as other compensation costs arising from services rendered by employees during the period. The other components of net benefit cost are required to be presented separately from service cost and outside of income from operations. As a result of this update, the net amount of interest cost, prior service cost and expected return on plan assets is now presented as other income. Effective January 1, 2018, we adopted the requirements of this ASU retrospectively, as required. We have recast our consolidated financial statements from amounts previously reported due to the adoption of new revenue recognition, pension and restricted cash standards. Impacted consolidated balance sheet line items, which reflect the adoption of the new ASUs, are as follows (in millions): December 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Assets: Other current assets $ 1,133 $ 170 $ — $ — $ 1,303 Total current assets 15,548 170 — — 15,718 Deferred income tax assets 265 1 — — 266 Total Assets $ 45,403 $ 171 $ — $ — $ 45,574 Liabilities: Accounts payable $ 3,872 $ 62 $ — $ — $ 3,934 Accrued wages and withholdings 2,521 87 — — 2,608 Other current liabilities (1) 905 29 — — 934 Total current liabilities 12,708 178 — — 12,886 Deferred income tax liabilities 757 (1 ) — — 756 Shareowners' Equity: Retained earnings 5,858 (6 ) — — 5,852 Total Shareowners' Equity 1,030 (6 ) — — 1,024 Total Liabilities and Shareowners' Equity $ 45,403 $ 171 $ — $ — $ 45,574 (1) The caption "Other current liabilities" was presented separately from "Hedge margin liabilities" of $17 million in the Form 10-K at December 31, 2017. These captions have been collapsed in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 included within this Form 10-Q. The unaudited consolidated statement of operations, which reflects the adoption of the new ASUs, is as follows (in millions): Three months ended March 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Revenue $ 15,315 $ 195 $ — $ — $ 15,510 Operating Expenses: Compensation and benefits 8,131 — 180 — 8,311 Repairs and maintenance 390 — — — 390 Depreciation and amortization 554 — — — 554 Purchased Transportation 2,366 179 — — 2,545 Fuel 621 — — — 621 Other occupancy 299 — — — 299 Other expenses 1,170 3 — — 1,173 Total Operating Expenses 13,531 182 180 — 13,893 Operating Profit 1,784 13 (180 ) — 1,617 Other Income and (Expense): Investment income and other 15 — 180 — 195 Interest expense (102 ) — — — (102 ) Total Other Income and (Expense) (87 ) — 180 — 93 Income Before Income Taxes 1,697 13 — — 1,710 Income Tax Expense 539 5 — — 544 Net Income $ 1,158 $ 8 $ — $ — $ 1,166 Basic earnings per share $ 1.32 $ 0.01 $ — $ — $ 1.33 Diluted earnings per share $ 1.32 $ 0.01 $ — $ — $ 1.33 (a) Recast to reflect the adoption of Revenue from Contracts with Customers. (b) Recast to reflect the adoption of Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. (c) Recast to reflect the adoption of Restricted Cash. The unaudited impacted consolidated statement of cash flows line items, which reflect the adoption of the new ASUs, are as follows (in millions): Three months ended March 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Net Income $ 1,158 $ 8 $ — $ — $ 1,166 Adjustments to reconcile net income to net cash from operating activities: Deferred tax (benefit) expense 94 5 — — 99 Other assets 397 (14 ) — — 383 Accounts payable (675 ) 2 — — (673 ) Accrued wages and withholdings (35 ) 1 — — (34 ) Other liabilities (272 ) (2 ) — — (274 ) Cash flows from operating activities 239 — — — 239 Purchase of marketable securities (519 ) — — 10 (509 ) Net cash used in investing activities (920 ) — — 10 (910 ) Net decrease in cash, cash equivalents and restricted cash (789 ) — — 10 (779 ) Cash, cash equivalents and restricted cash at the beginning of period 3,476 — — 445 3,921 Cash, cash equivalents and restricted cash at the end of period $ 2,687 $ — $ — $ 455 $ 3,142 (a) Recast to reflect the adoption of Revenue from Contracts with Customers. (b) Recast to reflect the adoption of Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. (c) Recast to reflect the adoption of Restricted Cash. In February 2018, the FASB issued an ASU that allows a reclassification from accumulated other comprehensive income ("AOCI") to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Tax Act"). Effective January 1, 2018, we early-adopted this ASU and elected to reclassify the income tax effects of the Tax Act from AOCI to retained earnings. This resulted in a $735 million increase to retained earnings and a $735 million decrease to AOCI. Our current accounting policy for releasing income tax effects from other comprehensive income is based on a portfolio approach. Other accounting pronouncements adopted during the periods covered by the consolidated financial statements did not have a material impact on our consolidated financial position, results of operations or cash flows. Accounting Standards Issued But Not Yet Effective In August 2017, the FASB issued an ASU to enhance recognition of the economic results of hedging activities in the financial statements. In addition, this update makes certain targeted improvements to simplify the application of the hedge accounting guidance and increase transparency regarding the scope and results of hedging activities. The guidance will generally be applied prospectively and becomes effective for us in the first quarter of 2019, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption but do not expect this ASU to have a material impact on our consolidated financial position, results of operations or cash flows. In March 2017, the FASB issued an ASU to require the premium on callable debt securities to be amortized to the earliest call date. The amortization period for callable debt securities purchased at a discount would not be impacted by the proposed update. Under U.S. GAAP, premiums on callable debt securities are generally amortized over the contractual life of the security. Only in cases when an entity has a large number of similar securities is it allowed to consider estimates of principal prepayments. Amortization of the premium over the contractual life of the instrument can result in losses being recorded for the unamortized premium if the issuer exercises the call feature prior to maturity. The standard will be effective for us in the first quarter of 2019, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption but do not expect this ASU to have a material impact on our consolidated financial position, results of operations or cash flows. In January 2017, the FASB issued an ASU to simplify the accounting for goodwill impairment. The update removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The standard will be effective for us in the first quarter of 2020, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption but do not expect this ASU to have a material impact on our consolidated financial position, results of operations or cash flows. In February 2016, the FASB issued an ASU that requires lessees to recognize a right-of-use asset and lease liability on their balance sheet for all leases with terms beyond twelve months. Although the distinction between operating and finance leases will continue to exist under the new standard, the recognition and measurement of expenses and cash flows will not change significantly from the current treatment. This new guidance requires modified retrospective application and becomes effective for us in the first quarter of 2019, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption on our consolidated financial position, results of operations, cash flows and related disclosures, as well as the impact of adoption on policies, practices and systems. Based on the preliminary evaluation of our lease portfolio, we believe the largest impact will be accounting for leases for real estate, as we have a large portfolio of leased properties. As of December 31, 2017, we had $ 1.637 billion of future minimum operating lease commitments that are not currently recognized on our consolidated balance sheets. We expect material changes to our consolidated balance sheets as a result of the new standard. Other accounting pronouncements issued, but not effective until after March 31, 2018 , are not expected to have a material impact on our consolidated financial position, results of operations or cash flows.

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	REVENUE RECOGNITION Revenue Recognition Substantially all of our revenues are from contracts associated with the pick-up, transportation and delivery of packages and freight (referred to hereafter as “transportation services”), whether carried out by or arranged by UPS, both domestically and internationally, which generally occurs over a short period of time. Additionally, we provide value-added logistics services to customers through our global network of company-owned and leased distribution centers and field stocking locations, both domestically and internationally. Disaggregation of Revenue Three months ended March 31, 2018 2017 Revenue: Next Day Air $ 1,784 $ 1,665 Deferred 1,069 970 Ground 7,374 6,901 U.S. Domestic Package $ 10,227 $ 9,536 Domestic $ 716 $ 613 Export 2,672 2,337 Cargo & Other 145 124 International Package $ 3,533 $ 3,074 Forwarding $ 1,605 $ 1,266 Logistics 782 740 Freight 777 707 Other 189 187 Supply Chain & Freight $ 3,353 $ 2,900 Consolidated revenue $ 17,113 $ 15,510 We account for a contract when both parties have approved the contract and are committed to perform their obligations, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the basis of revenue recognition in accordance with U.S. GAAP. To determine the proper revenue recognition method for contracts, we evaluate whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. This evaluation requires judgment, and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For most of our contracts, the customer contracts with us to provide distinct services within a contract, such as transportation services of their goods. The vast majority of our contracts with customers for transportation services include only one performance obligation, the transportation services themselves. However, if a contract is separated into more than one performance obligation, we allocate the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. We frequently sell standard transportation services with observable standalone sales prices. In these instances, the observable standalone sales are used to determine the standalone selling price. In certain of our business units, such as Logistics, we sell customized customer-specific solutions in which we provide a significant service of integrating a complex set of tasks and components into a single capability (even if that single capability results in the delivery of multiple units). Hence, the entire contract is accounted for as one performance obligation. In these cases we typically use the expected cost plus a margin approach to estimate the standalone selling price of each performance obligation. Satisfaction of Performance Obligations We generally recognize revenue over time as we perform the services in the contract because of the continuous transfer of control to the customer. Our customers receive the benefit of our services as the goods are transported from one location to another. Further, if we were unable to complete delivery to the final location, another entity would not need to reperform the transportation service already performed. As control transfers over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. We use the cost-to-cost measure of progress for our package delivery contracts because it best depicts the transfer of control to the customer which occurs as we incur costs on our contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues, including ancillary or accessorial fees and reductions for estimated customer incentives, are recorded proportionally as costs are incurred. Costs to fulfill include labor and other direct costs and an allocation of indirect costs. For our freight and freight forwarding contracts, an output method of progress based on time-in-transit is utilized as the timing of costs incurred does not best depict the transfer of control to the customer. In our Logistics business we have a right to consideration from customers in an amount that corresponds directly with the value to the customers of our performance completed to date, and as such we recognize revenue in the amount to which we have a right to invoice the customer. Variable Consideration It is common for our contracts to contain customer incentives, guaranteed service refunds or other provisions that can either increase or decrease the transaction price. These variable amounts are generally awarded upon achievement of certain incentive tiers or performance metrics. We estimate variable consideration at the most likely amount to which we expect to be entitled. We include estimated amounts of revenue, which may be reduced by incentives or other contract provisions, in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based on an assessment of anticipated customer spending and all information (historical, current and forecasted) that is reasonably available to us. Contract Modifications Contracts are often modified to account for changes in the rates we charge our customers or to add additional distinct services. We consider contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Contract modifications that add additional distinct goods or services are treated as separate contracts. Contract modifications that do not add distinct goods or services typically change the price of existing services. These contract modifications will be accounted for prospectively as the remaining performance obligations are distinct. Payment Terms Under the typical payment terms of our customer contracts, the customer pays at periodic intervals (i.e., every 14 days, 30 days, 45 days, etc.) for shipments included on invoices received. Invoices are generated each week on the week-ending day, which is Saturday for the majority of our U.S. Domestic Package business, but could be another day depending on the business unit or the specific agreement with the customer. It is not customary business practice to extend payment terms past 90 days, and as such, we do not have a practice of including a significant financing component within our revenue contracts with customers. Principal vs. Agent Considerations In our transportation businesses, we utilize independent contractors and third-party carriers in the performance of some transportation services. U.S. GAAP requires us to evaluate whether our businesses themselves promise to transfer services to the customer (as the principal) or to arrange for services to be provided by another party (as the agent) using a control model. Based on our evaluation of the control model, we determined that all of our major businesses act as the principal rather than the agent within their revenue arrangements. This required a change for certain of our Supply Chain & Freight businesses where previously revenue was reported net of associated purchased transportation costs. Revenue and the associated purchased transportation costs are now both reported on a gross basis within our statement of consolidated income. Accounts Receivable, Net Accounts receivable, net, include amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. Losses on accounts receivable are recognized when they are incurred, which requires us to make our best estimate of the probable losses inherent in our customer receivables at each balance sheet date. These estimates require consideration of historical loss experience, adjusted for current conditions, trends in customer payment frequency, and judgments about the probable effects of relevant observable data, including present economic conditions and the financial health of specific customers and market sectors. Our risk management process includes standards and policies for reviewing major account exposures and concentrations of risk. Our total provision for doubtful accounts charged to expense before recoveries during the quarters ended March 31, 2018 and 2017 was $12 and $39 million , respectively. Contract Assets and Liabilities Contract assets include billed and unbilled amounts resulting from in-transit packages, as we have an unconditional right to payment only once all performance obligations have been completed (i.e., packages have been delivered), and our right to payment is not solely based on the passage of time. Amounts may not exceed their net realizable value. Contract assets are generally classified as current and the full balance is converted each quarter based on the short-term nature of the transactions. Our contract liabilities consist of advance payments and billings in excess of revenue and deferred revenue. Advance payments and billings in excess of revenue represent payments received from our customers that will be earned over the contract term. Deferred revenue represents the amount of revenue due from customers related to in-transit shipments that has not yet been earned based on our selected measure of progress. We classify advance payments and billings in excess of revenue as either current or long-term, depending on the period over which the advance payment will be earned. We classify deferred revenue as current based on the timing of when we expect to recognize revenue, which typically occurs within a short window after period-end. The full balance of deferred revenue is converted each quarter based on the short-term nature of the transactions. Our contract assets and liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. In order to determine revenue recognized in the period from contract liabilities, we first allocate revenue to the individual contract liability balance outstanding at the beginning of the period until the revenue exceeds that deferred revenue balance. Contract assets related to in-transit packages were $175 and $170 million at March 31, 2018 and December 31, 2017, respectively, net of deferred revenue related to in-transit packages of $224 and $174 million at March 31, 2018 and December 31, 2017, respectively. Contract assets are included within "Other current assets" in the consolidated balance sheets. Contract liabilities related to advanced payments from customers were $35 and $31 million at March 31, 2018 and December 31, 2017, respectively. Contract liabilities are included within "Other current liabilities" in the consolidated balance sheets.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION We issue employee share-based awards under the UPS Incentive Compensation Plan, which permits the grant of non-qualified and incentive stock options, stock appreciation rights, restricted stock and stock units, and restricted performance shares and performance units to eligible employees (restricted stock and stock units, restricted performance shares and performance units are herein referred to as "Restricted Units"). Upon vesting, Restricted Units result in the issuance of the equivalent number of UPS class A common shares after required tax withholdings. Dividends accrued on Restricted Units are reinvested in additional Restricted Units at each dividend payable date, and are subject to the same vesting and forfeiture conditions as the underlying Restricted Units upon which they are earned. The primary compensation programs offered under the UPS Incentive Compensation Plan include the UPS Management Incentive Award program, the UPS Long-Term Incentive Performance Award program and the UPS Stock Option program. We also maintain an employee stock purchase plan which allows eligible employees to purchase shares of UPS class A common stock at a discount. Additionally, our matching contributions to the primary employee defined contribution savings plan are made in shares of UPS class A common stock. Management Incentive Award Program ("MIP") During the first quarter of 2018 , we granted Restricted Units under MIP to certain eligible management employees. Restricted Units granted under MIP generally vest over a five -year period with approximately 20% of the award vesting on January 15th of each of the years following the grant date (except in the case of death or disability, in which case immediate vesting occurs). The entire grant is expensed on a straight-line basis (less estimated forfeitures) ratably over the requisite service period (except in the case of death, disability or retirement, in which case immediate expensing occurs). Based on the date that the eligible management population and performance targets were approved for MIP, we determined the award measurement date to be February 7, 2018 (for U.S.-based employees), March 1, 2018 (for management committee employees) and March 26, 2018 (for international-based employees); therefore, the Restricted Units awarded were valued for stock compensation expense purposes using the closing New York Stock Exchange price of $111.91 , $106.43 and $103.70 on those dates, respectively. Long-Term Incentive Performance Award Program ("LTIP") We award Restricted Units under LTIP to certain eligible management employees. The performance targets are equally-weighted among consolidated operating return on invested capital ("ROIC"), growth in currency-constant consolidated revenue and total shareowner return ("RTSR") relative to a peer group of companies. These Restricted Units generally vest at the end of a three -year period (except in the case of death, disability, or retirement, in which case immediate vesting occurs on a prorated basis). The number of Restricted Units earned will be based on the percentage achievement of the performance targets established on the grant date. For the two-thirds of the award related to ROIC and growth in currency-constant consolidated revenue, we recognize the grant date fair value of these Restricted Units (less estimated forfeitures) as compensation expense ratably over the vesting period, based on the number of awards expected to be earned. The remaining one-third of the award related to RTSR is valued using a Monte Carlo model. We recognize the grant date fair value of this portion of the award as compensation expense (less estimated forfeitures) ratably over the vesting period. There were no LTIP awards granted in the first quarter of 2018. Based on the date that the eligible management population and performance targets were approved for the 2017 LTIP Award, we determined the award measurement date to be March 24, 2017; therefore, the target Restricted Units awarded for the ROIC and growth in currency-constant consolidated revenue portions of the award were valued for stock compensation expense using the closing New York Stock Exchange price of $105.05 on that date. The weighted-average assumptions used and the calculated weighted-average fair values of the RTSR portion of the LTIP awards granted in 2017 are as follows: 2017 Risk-free interest rate 1.46 % Expected volatility 16.59 % Weighted-average fair value of units granted $ 119.29 Share payout 113.55 % There is no expected dividend yield as units earn dividend equivalents. Non-Qualified Stock Options During the first quarter of 2018 , we granted non-qualified stock option awards to a limited group of eligible senior management employees under the UPS Stock Option program. Stock option awards generally vest over a five -year period with approximately 20% of the award vesting at each anniversary date of the grant (except in the case of death or disability, in which case immediate vesting occurs). The options granted will expire ten years after the date of the grant. In the first quarter of 2018 , we granted 0.3 and 0.01 million stock options at a grant price of $106.43 and $104.45 , respectively, which is based on the closing New York Stock Exchange price on March 1, 2018 and March 22, 2018, respectively. In the first quarter of 2017, we granted 0.3 million stock options at a grant price of $ 106.87 , which is based on the closing New York Stock Exchange price on March 1, 2017. The fair value of each option grant is estimated using the Black-Scholes option pricing model. The weighted-average assumptions used and the calculated weighted-average fair values of options granted in 2018 and 2017 are as follows: 2018 2017 Expected dividend yield 2.93 % 2.89 % Risk-free interest rate 2.84 % 2.15 % Expected life (in years) 7.5 7.5 Expected volatility 16.72 % 17.81 % Weighted-average fair value of options granted $ 15.23 $ 14.70 Compensation expense for share-based awards recognized in "Compensation and benefits" on the statements of consolidated income for the three months ended March 31, 2018 and 2017 was $ 239 and $ 212 million, respectively.

INVESTMENTS AND RESTRICTED CASH

INVESTMENTS AND RESTRICTED CASH	3 Months Ended
	Mar. 31, 2018
Marketable Securities [Abstract]
INVESTMENTS AND RESTRICTED CASH	CASH AND INVESTMENTS The following is a summary of marketable securities classified as trading and available-for-sale as of March 31, 2018 and December 31, 2017 (in millions): Cost Unrealized Gains Unrealized Losses Estimated Fair Value March 31, 2018: Current trading marketable securities: Corporate debt securities $ 75 $ — $ — $ 75 Equity Securities 2 — — 2 Total trading marketable securities $ 77 $ — $ — $ 77 Current available-for-sale securities: U.S. government and agency debt securities $ 312 $ — $ (4 ) $ 308 Mortgage and asset-backed debt securities 32 — (1 ) 31 Corporate debt securities 229 1 (2 ) 228 U.S. state and local municipal debt securities 10 — — 10 Non-U.S. government debt securities 11 — — 11 Total available-for-sale marketable securities $ 594 $ 1 $ (7 ) $ 588 Total current marketable securities $ 671 $ 1 $ (7 ) $ 665 Cost Unrealized Gains Unrealized Losses Estimated Fair Value December 31, 2017: Current trading marketable securities: Corporate debt securities $ 75 $ — $ — $ 75 Carbon credit investments (1) 77 16 — 93 Total trading marketable securities $ 152 $ 16 $ — $ 168 Current available-for-sale securities: U.S. government and agency debt securities $ 286 $ — $ (3 ) $ 283 Mortgage and asset-backed debt securities 86 — — 86 Corporate debt securities 201 1 (1 ) 201 Equity securities 2 — — 2 Non-U.S. government debt securities 9 — — 9 Total available-for-sale marketable securities $ 584 $ 1 $ (4 ) $ 581 Total current marketable securities $ 736 $ 17 $ (4 ) $ 749 (1) These investments are hedged with forward contracts that are not designated in hedging relationships. See Note 14 for offsetting statement of consolidated income impact. Investment Other-Than-Temporary Impairments We have concluded that no material other-than-temporary impairment losses existed as of March 31, 2018 . In making this determination, we considered the financial condition and prospects of the issuer, the magnitude of the losses compared with the investments’ cost, the probability that we will be unable to collect all amounts due according to the contractual terms of the security, the credit rating of the security and our ability and intent to hold these investments until the anticipated recovery in market value occurs. Maturity Information The amortized cost and estimated fair value of marketable securities at March 31, 2018 , by contractual maturity, are shown below (in millions). Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties. Cost Estimated Fair Value Due in one year or less $ 129 $ 129 Due after one year through three years 434 429 Due after three years through five years 22 21 Due after five years 84 84 669 663 Equity and carbon credit investments 2 2 $ 671 $ 665 Non-Current Investments and Restricted Cash Non-current investments and restricted cash is primarily associated with our self-insurance requirements. We entered into an escrow agreement with an insurance carrier to guarantee our self-insurance obligations. This agreement requires us to provide collateral to the insurance carrier, which is invested in various marketable securities. Collateral provided is reflected in "Cash, cash equivalents and restricted cash" in the statements of consolidated cash flows. At March 31, 2018 and December 31, 2017 , we had $ 282 and $ 449 million in self-insurance investments and restricted cash, respectively. We held a $19 million investment in a variable life insurance policy to fund benefits for the UPS Excess Coordinating Benefit Plan at March 31, 2018 and December 31, 2017 . The quarterly change in investment fair value is recognized in "Investment income and other" on the statements of consolidated income. Additionally, we held escrowed cash related to the acquisition and disposition of certain assets, primarily real estate, of $10 and $ 15 million as of March 31, 2018 and December 31, 2017 , respectively. The amounts described above are classified as “Non-Current Investments and Restricted Cash” in the consolidated balance sheets. A reconciliation of cash and cash equivalents and restricted cash from the consolidated balance sheets to the statements of consolidated cash flows is shown below (in millions). March 31, 2018 December 31, 2017 March 31, 2017 Cash and cash equivalents $ 3,544 $ 3,320 $ 2,687 Restricted cash 282 449 455 Total cash, cash equivalents and restricted cash $ 3,826 $ 3,769 $ 3,142 Fair Value Measurements Marketable securities utilizing Level 1 inputs include active exchange-traded equity securities and equity index funds, and most U.S. government debt securities, as these securities all have quoted prices in active markets. Marketable securities utilizing Level 2 inputs include asset-backed securities, corporate bonds and municipal bonds. These securities are valued using market corroborated pricing, matrix pricing or other models that utilize observable inputs such as yield curves. We maintain holdings in certain investment partnerships that are measured at fair value utilizing Level 3 inputs (classified as “Other non-current investments” in the tables below, and as “Other Non-Current Assets” in the consolidated balance sheets). These partnership holdings do not have quoted prices, nor can they be valued using inputs based on observable market data. These investments are valued internally using a discounted cash flow model with two significant inputs: (1) the after-tax cash flow projections for each partnership, and (2) a risk-adjusted discount rate consistent with the duration of the expected cash flows for each partnership. The weighted-average discount rates used to value these investments were 7.92% and 7.56% as of March 31, 2018 and December 31, 2017 , respectively. These inputs, and the resulting fair values, are updated on a quarterly basis. The following table presents information about our investments measured at fair value on a recurring basis as of March 31, 2018 and December 31, 2017 , and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value (in millions): Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance March 31, 2018: Marketable Securities: U.S. government and agency debt securities $ 308 $ — $ — $ 308 Mortgage and asset-backed debt securities — 31 — 31 Corporate debt securities — 303 — 303 U.S. state and local municipal debt securities — 10 — 10 Equity securities — 2 — 2 Non-U.S. government debt securities — 11 — 11 Total marketable securities 308 357 — 665 Other non-current investments 19 — 3 22 Total $ 327 $ 357 $ 3 $ 687 December 31, 2017: Marketable Securities: U.S. government and agency debt securities $ 283 $ — $ — $ 283 Mortgage and asset-backed debt securities 86 — 86 Corporate debt securities — 276 — 276 Equity securities — 2 — 2 Non-U.S. government debt securities — 9 — 9 Carbon credit investments 93 — — 93 Total marketable securities 376 373 — 749 Other non-current investments 19 — 6 25 Total $ 395 $ 373 $ 6 $ 774 The following table presents the changes in the above Level 3 instruments measured on a recurring basis for the three months ended March 31, 2018 and 2017 (in millions): Marketable Securities Other Non-Current Investments Total Balance on January 1, 2018 $ — $ 6 $ 6 Transfers into (out of) Level 3 — — — Net realized and unrealized gains (losses): Included in earnings (in investment income and other) — (3 ) (3 ) Included in accumulated other comprehensive income (pre-tax) — — — Purchases — — — Sales — — — Balance on March 31, 2018 $ — $ 3 $ 3 Marketable Securities Other Non-Current Investments Total Balance on January 1, 2017 $ — $ 13 $ 13 Transfers into (out of) Level 3 — — — Net realized and unrealized gains (losses): Included in earnings (in investment income and other) — (2 ) (2 ) Included in accumulated other comprehensive income (pre-tax) — — — Purchases — — — Sales — — — Balance on March 31, 2017 $ — $ 11 $ 11 There were no transfers of investments between Level 1 and Level 2 during the three months ended March 31, 2018 and 2017 . Marketable Securities Other Investments

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment as of March 31, 2018 and December 31, 2017 consist of the following (in millions): 2018 2017 Vehicles $ 9,422 $ 9,365 Aircraft 16,444 16,248 Land 1,782 1,582 Buildings 4,150 4,035 Building and leasehold improvements 4,049 3,934 Plant equipment 9,833 9,387 Technology equipment 1,956 1,907 Equipment under operating leases — 29 Construction-in-progress 2,673 2,239 50,309 48,726 Less: Accumulated depreciation and amortization (27,070 ) (26,608 ) $ 23,239 $ 22,118 We continually monitor our aircraft fleet utilization in light of current and projected volume levels, aircraft fuel prices and other factors. Additionally, we monitor all other property, plant and equipment categories for any indicators that the carrying value of the assets may not be recoverable. No impairment charges on property, plant and equipment were recorded during the three months ended March 31, 2018 and 2017 .

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS Company-Sponsored Benefit Plans Information about net periodic benefit cost for our company-sponsored pension and postretirement benefit plans is as follows for the three months ended March 31, 2018 and 2017 (in millions): U.S. Pension Benefits U.S. Postretirement Medical Benefits International Pension Benefits 2018 2017 2018 2017 2018 2017 Three Months Ended March 31: Service cost $ 416 $ 390 $ 7 $ 7 $ 16 $ 15 Interest cost 449 462 26 28 12 10 Expected return on assets (801 ) (712 ) (2 ) (2 ) (20 ) (16 ) Amortization of prior service cost 49 48 2 2 — — Net periodic benefit cost $ 113 $ 188 $ 33 $ 35 $ 8 $ 9 During the first three months of 2018 , we contributed $ 24 and $20 million to our company-sponsored pension and U.S. postretirement medical benefit plans, respectively. We currently expect to contribute $74 and $59 million over the remainder of the year to the pension and U.S. postretirement medical benefit plans, respectively. Subject to market conditions, we continually evaluate opportunities for additional discretionary pension contributions. The components of net periodic benefit cost other than current service cost are presented within “Investment income and other” in the statements of consolidated income. Plan Amendments and Curtailments In the quarter ended June 30, 2017, we amended the UPS Retirement Plan and the UPS Excess Coordinating Benefit Plan to cease accruals of additional benefits for future service and compensation for non-union participants effective January 1, 2023. We remeasured plan assets and pension benefit obligations for the affected pension plans as of June 30, 2017, resulting in a net actuarial gain of $569 million. This reflected a curtailment gain of $1.525 billion resulting from the benefit plan changes that was partially offset by net actuarial losses of $956 million, driven by a reduction of approximately 32 basis points in the discount rate compared to December 31, 2016, offset by actual assets returns approximately 275 basis points above our expected return as of the remeasurement date. The net curtailment gain reduced the actuarial loss recorded in "Accumulated other comprehensive loss" in the equity section of the consolidated balance sheet. As actuarial losses were within the corridor (defined as 10% of the greater of the fair value of plan assets and the plan's projected benefit obligation), there was no impact to the statement of consolidated income as a result of this remeasurement. Effective June 23, 2017, the Company amended the UPS 401(k) Savings Plan so that non-union employees who currently participate in the UPS Retirement Plan will, in addition to current benefits under the UPS 401(k) Savings Plan, earn a UPS Retirement Contribution beginning January 1, 2023. UPS will contribute 5% to 8% of eligible compensation to the UPS 401(k) Savings Plan based on years of vesting service. The amendment also provides for transition contributions for certain participants. There was no impact to the statement of consolidated income for the quarter ended March 31, 2018 as a result of the above changes. Multiemployer Benefit Plans We contribute to a number of multiemployer defined benefit and health and welfare plans under terms of collective bargaining agreements that cover our union-represented employees. Our current collective bargaining agreements set forth the annual contribution increases allotted to the plans that we participate in, and we are in compliance with these contribution rates. These limitations on annual contribution rates will remain in effect throughout the terms of the existing collective bargaining agreements. As of March 31, 2018 and December 31, 2017 we had $ 857 and $859 million , respectively, recorded in "Other non-current liabilities," as well as $8 million as of March 31, 2018 and December 31, 2017 , recorded in "Other current liabilities," on our consolidated balance sheets associated with our previous withdrawal from a multiemployer pension plan. This liability is payable in equal monthly installments over a remaining term of approximately 45 years. Based on the borrowing rates currently available to us for long-term financing of a similar maturity, the fair value of this withdrawal liability as of March 31, 2018 and December 31, 2017 was $ 868 and $ 921 million , respectively. We utilized Level 2 inputs in the fair value hierarchy of valuation techniques to determine the fair value of this liability. UPS was a contributing employer to the Central States Pension Fund (“CSPF”) until 2007 when we withdrew from the plan and fully funded our allocable share of unfunded vested benefits by paying a $6.1 billion withdrawal liability. Under a collective bargaining agreement with the International Brotherhood of Teamsters (“IBT”), UPS agreed to provide coordinating benefits in the UPS/IBT Full Time Employee Pension Plan (“UPS/IBT Plan”) for UPS participants whose last employer was UPS and who had not retired as of January 1, 2008 (“the UPS Transfer Group”) in the event that benefits are lawfully reduced by the CSPF in the future consistent with the terms of our withdrawal agreement with the CSPF. In December 2014, Congress passed the Multiemployer Pension Reform Act (“MPRA”), which for the first time ever allowed multiemployer pension plans to reduce benefit payments to retirees, subject to specific guidelines in the statute and government approval. In September 2015, the CSPF submitted a proposed pension benefit reduction plan to the U.S. Department of the Treasury under the MPRA. The CSPF plan proposed to reduce retirement benefits to the CSPF participants, including the UPS Transfer Group. We vigorously challenged the proposed benefit reduction plan because we believed that it did not comply with the law and that the CSPF failed to comply with its contractual obligation to obtain our consent to reduce benefits to the UPS Transfer Group under the terms of the withdrawal agreement with the CSPF. On May 6, 2016, the U.S. Department of the Treasury rejected the proposed plan submitted by the CSPF, stating that it failed to satisfy a number of requirements set forth in the MPRA. The CSPF has asserted that it will become insolvent in 2025 which could lead to the reduction of retirement benefits. Although there are numerous factors that could affect the CSPF’s funding status, if the CSPF were to become insolvent as they have projected, UPS may be required to provide coordinating benefits, thereby increasing the current projected benefit obligation for the UPS/IBT Plan by approximately $4 billion . The CSPF has said that it believes a legislative solution to its funding status is necessary, and we expect that the CSPF will continue to explore options to avoid insolvency. The potential obligation to pay coordinating benefits from the UPS/IBT Plan is subject to a number of significant uncertainties, including actions that may be taken by the CSPF, the federal government or others. These actions include whether the CSPF will submit a revised pension benefit reduction plan or otherwise seek federal government assistance, the extent to which benefits are paid by the Pension Benefit Guaranty Corporation and our ability to successfully defend our legal positions, as well as the effect of discount rates and various other actuarial assumptions. We account for this potential obligation under Accounting Standards Codification Topic 715- Compensation- Retirement Benefits (“ASC 715”). Under ASC 715 we are required to provide a best estimate of various actuarial assumptions, including the eventual outcome of this matter, in measuring our pension benefit obligation at the December 31st measurement date. While we currently believe the most likely solution to this matter and the broader systemic problems facing multiemployer pension plans is intervention by the federal government, ASC 715 does not permit anticipation of changes in law in making a best estimate of pension liabilities. Our best estimate as of the measurement date of December 31, 2017 did not incorporate this solution. However, if a future change in law resulted in an obligation to provide coordinating benefits under the UPS/IBT Plan, it may be a significant event, and may require us to remeasure the plan assets and projected benefit obligation of the UPS/IBT Plan at the date the law is enacted. Our best estimate of the next most likely outcome to resolve the CSPF’s solvency concerns is that the CSPF will submit another MPRA filing to forestall insolvency without reducing benefits to the UPS Transfer Group. If the CSPF attempts to reduce benefits for the UPS Transfer Group under a MPRA filing, we would be in a strong legal position to prevent that from occurring given that these benefits cannot be reduced without our consent and such a reduction, without first exhausting reductions to other groups in the CSPF, would be contrary to the statute. Accordingly, our best estimate as of the measurement date of December 31, 2017, was that there is no liability to be recognized for additional coordinating benefits of the UPS/IBT Plan. However, the projected benefit obligation could materially increase as the uncertainties are resolved. We will continue to assess the impact of these uncertainties on the projected benefit obligation of the UPS/IBT Plan in accordance with ASC 715. Collective Bargaining Agreements As of December 31, 2017, we had approximately 280,000 employees employed under a national master agreement and various supplemental agreements with local unions affiliated with the Teamsters. These agreements run through July 31, 2018. We have approximately 2,700 pilots who are employed under a collective bargaining agreement with the Independent Pilots Association ("IPA"), which runs through September 1, 2021. Our airline mechanics are covered by a collective bargaining agreement with Teamsters Local 2727, which became amendable November 1, 2013. We are currently in negotiations with Teamsters Local 2727. In addition, approximately 3,100 of our auto and maintenance mechanics who are not employed under agreements with the Teamsters are employed under collective bargaining agreements with the International Association of Machinists and Aerospace Workers (“IAM”) that will expire on July 31, 2019.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS The following table indicates the allocation of goodwill by reportable segment as of March 31, 2018 and December 31, 2017 (in millions): U.S. Domestic Package International Package Supply Chain & Freight Consolidated December 31, 2017: $ 715 $ 435 $ 2,722 $ 3,872 Acquired — — — — Currency / Other — 3 18 21 March 31, 2018: $ 715 $ 438 $ 2,740 $ 3,893 The change in goodwill for both the International Package and Supply Chain & Freight segments was primarily due to the impact of changes in the value of the U.S. Dollar on the translation of non-U.S. Dollar goodwill balances. The following is a summary of intangible assets as of March 31, 2018 and December 31, 2017 (in millions): Gross Carrying Amount Accumulated Amortization Net Carrying Value March 31, 2018: Capitalized software $ 3,402 $ (2,357 ) $ 1,045 Licenses 114 (17 ) 97 Franchise rights 146 (99 ) 47 Customer relationships 777 (174 ) 603 Trade name 200 — 200 Trademarks, patents and other 68 (35 ) 33 Total Intangible Assets, Net $ 4,707 $ (2,682 ) $ 2,025 December 31, 2017: Capitalized software $ 3,273 $ (2,310 ) $ 963 Licenses 114 (10 ) 104 Franchise rights 144 (97 ) 47 Customer relationships 776 (160 ) 616 Trade name 200 — 200 Trademarks, patents and other 71 (37 ) 34 Total Intangible Assets, Net $ 4,578 $ (2,614 ) $ 1,964 As of March 31, 2018 , we had a trade name with a carrying value of $ 200 million and licenses with a carrying value of $ 5 million, which are deemed to be indefinite-lived intangible assets and are included in the table above.

DEBT AND FINANCING ARRANGEMENTS

DEBT AND FINANCING ARRANGEMENTS	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
DEBT AND FINANCING ARRANGEMENTS	DEBT AND FINANCING ARRANGEMENTS The carrying value of our outstanding debt as of March 31, 2018 and December 31, 2017 consists of the following (in millions): Principal Amount Carrying Value Maturity 2018 2017 Commercial paper $ 2,622 2018 $ 2,622 $ 3,203 Fixed-rate senior notes: 5.500% senior notes 750 2018 — 751 5.125% senior notes 1,000 2019 1,010 1,019 3.125% senior notes 1,500 2021 1,526 1,549 2.050% senior notes 700 2021 697 696 2.450% senior notes 1,000 2022 961 979 2.350% senior notes 600 2022 597 597 2.500% senior note 1,000 2023 993 992 2.800% senior note 500 2024 496 495 2.400% senior note 500 2026 497 497 3.050% senior note 1,000 2027 991 990 6.200% senior notes 1,500 2038 1,482 1,482 4.875% senior notes 500 2040 490 489 3.625% senior notes 375 2042 368 368 3.400% senior notes 500 2046 491 491 3.750 % senior notes 1,150 2047 1,136 1,135 Floating-rate senior notes: Floating-rate senior notes 350 2021 349 348 Floating-rate senior notes 400 2022 398 398 Floating-rate senior notes 500 2023 498 496 Floating-rate senior notes 1,043 2049-2067 1,031 1,032 8.375% Debentures: 8.375% debentures 424 2020 441 447 8.375% debentures 276 2030 282 282 Pound Sterling notes: 5.500% notes 93 2031 88 84 5.125% notes 640 2050 610 586 Euro senior notes: 0.375% notes 862 2023 856 832 1.625% notes 862 2025 856 833 1.000% notes 616 2028 612 595 1.500% notes 616 2032 611 594 Floating-rate senior notes 616 2020 614 598 Canadian senior notes: 2.125% notes 580 2024 577 593 Capital lease obligations 580 2018-3005 580 500 Facility notes and bonds 320 2029-2045 319 319 Other debt 13 2018-2022 13 19 Total debt $ 23,988 23,092 24,289 Less: Current maturities (2,683 ) (4,011 ) Long-term debt $ 20,409 $ 20,278 Commercial Paper We are authorized to borrow up to $ 10.0 billion under a U.S. commercial paper program and € 5.0 billion (in a variety of currencies) under a European commercial paper program. We had the following amounts outstanding under these programs as of March 31, 2018 : $ 2.511 billion with an average interest rate of 1.73% and € 90 million ($ 111 million) with an average interest rate of - 0.43% . As of March 31, 2018 , we have classified the entire commercial paper balance as a current liability on our consolidated balance sheet. Debt Classification We have classified certain floating-rate senior notes that are putable by the note holders as a long-term liability, due to our intent and ability to refinance the debt if the put option is exercised by the note holders. Debt Repayments On January 15, 2018, our $ 750 million 5.500% senior notes matured and were repaid in full. Sources of Credit We maintain two credit agreements with a consortium of banks. One of these agreements provides revolving credit facilities of $4.5 billion, and expires on March 22, 2019 . Generally, amounts outstanding under this facility bear interest at a periodic fixed rate equal to LIBOR for the applicable interest period and currency denomination, plus an applicable margin. Alternatively, a fluctuating rate of interest equal to the highest of (1) JPMorgan Chase Bank’s publicly announced prime rate; (2) the Federal Funds effective rate plus 0.50% ; and (3) LIBOR for a one month interest period plus 1.00% , plus an applicable margin, may be used at our discretion. In each case, the applicable margin for advances bearing interest based on LIBOR is a percentage determined by quotations from Markit Group Ltd. for our 1-year credit default swap spread, subject to a minimum rate of 0.10% and a maximum rate of 0.75% . The applicable margin for advances bearing interest based on the prime rate is 1.00% below the applicable margin for LIBOR advances (but not lower than 0.00% ). We are also able to request advances under this facility based on competitive bids for the applicable interest rate. There were no amounts outstanding under this facility as of March 31, 2018 . The second agreement provides revolving credit facilities of $ 3.0 billion, and expires on March 24, 2022 . Generally, amounts outstanding under this facility bear interest at a periodic fixed rate equal to LIBOR for the applicable interest period and currency denomination, plus an applicable margin. Alternatively, a fluctuating rate of interest equal to the highest of (1) JPMorgan Chase Bank’s publicly announced prime rate; (2) the Federal Funds effective rate plus 0.50% ; and (3) LIBOR for a one month interest period plus 1.00% , plus an applicable margin, may be used at our discretion. In each case, the applicable margin for advances bearing interest based on LIBOR is a percentage determined by quotations from Markit Group Ltd. for our 1-year credit default swap spread, interpolated for a period from the date of determination of such credit default swap spread in connection with a new interest period until the latest maturity date of this facility then in effect (but not less than a period of one year). The minimum applicable margin rate is 0.10% and the maximum applicable margin rate is 0.75% per annum. The applicable margin for advances bearing interest based on the prime rate is 1.00% below the applicable margin for LIBOR advances (but not less than 0.00% ). We are also able to request advances under this facility based on competitive bids. There were no amounts outstanding under this facility as of March 31, 2018 . Debt Covenants Our existing debt instruments and credit facilities subject us to certain financial covenants. As of March 31, 2018 and for all prior periods presented, we have satisfied these financial covenants. These covenants limit the amount of secured indebtedness that we may incur, and limit the amount of attributable debt in sale-leaseback transactions, to 10% of net tangible assets. As of March 31, 2018 , 10% of net tangible assets was equivalent to $2.740 billion; however, we have no covered sale-leaseback transactions or secured indebtedness outstanding. We do not expect these covenants to have a material impact on our financial condition or liquidity. Fair Value of Debt Based on the borrowing rates currently available to the Company for long-term debt with similar terms and maturities, the fair value of long-term debt, including current maturities, was approximately $ 23.968 and $ 25.206 billion as of March 31, 2018 and December 31, 2017 , respectively. We utilized Level 2 inputs in the fair value hierarchy of valuation techniques to determine the fair value of all of our debt instruments.

LEGAL PROCEEDINGS AND CONTINGEN

LEGAL PROCEEDINGS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
LEGAL PROCEEDINGS AND CONTINGENCIES	LEGAL PROCEEDINGS AND CONTINGENCIES We are involved in a number of judicial proceedings and other matters arising from the conduct of our business activities. Although there can be no assurance as to the ultimate outcome, we have generally denied, or believe we have a meritorious defense and will deny, liability in all litigation pending against us, including (except as otherwise noted herein) the matters described below, and we intend to defend vigorously each case. We have accrued for legal claims when, and to the extent that, amounts associated with the claims become probable and can be reasonably estimated. The actual costs of resolving legal claims may be substantially higher or lower than the amounts accrued for those claims. For those matters as to which we are not able to estimate a possible loss or range of loss, we are not able to determine whether the loss will have a material adverse effect on our business, financial condition or results of operations or liquidity. For matters in this category, we have indicated in the descriptions that follow the reasons that we are unable to estimate the possible loss or range of loss. Judicial Proceedings We are a defendant in a number of lawsuits filed in state and federal courts containing various class action allegations under state wage-and-hour laws. At this time, we do not believe that any loss associated with these matters would have a material adverse effect on our financial condition, results of operations or liquidity. UPS and our subsidiary The UPS Store, Inc. are defendants in Morgate v. The UPS Store, Inc. et al., an action in the Los Angeles Superior Court brought on behalf of a certified class of all franchisees who chose to rebrand their Mail Boxes Etc. franchises to The UPS Store in March 2003. Plaintiff alleges that UPS and The UPS Store, Inc. misrepresented and omitted facts to the class about the market tests that were conducted before offering the class the choice of whether to rebrand to The UPS Store. Defendants’ motion to decertify the class was granted in August 2017. The plaintiff has filed a notice of appeal, and further proceedings in the trial court are stayed pending resolution by the California Court of Appeal. There are multiple factors that prevent us from being able to estimate the amount of loss, if any, that may result from the remaining aspects of this case, including: (1) we are vigorously defending ourselves and believe we have a number of meritorious legal defenses; (2) it remains uncertain what evidence of damages, if any, plaintiffs will be able to present; and (3) plaintiff’s notice of appeal is pending. Accordingly, at this time, we are not able to estimate a possible loss or range of loss that may result from this matter or to determine whether such loss, if any, would have a material adverse effect on our financial condition, results of operations or liquidity. In AFMS LLC v. UPS and FedEx Corporation, a lawsuit filed in federal court in the Central District of California in August 2010, the plaintiff asserts that UPS and FedEx violated U.S. antitrust law by conspiring to refuse to negotiate with third-party negotiators retained by shippers and by individually imposing policies that prevent shippers from using such negotiators. The Court granted summary judgment motions filed by UPS and FedEx, entered judgment in favor of UPS and FedEx, and dismissed the case. Plaintiff appealed to the Court of Appeals for the Ninth Circuit. In August 2017, the Ninth Circuit affirmed the District Court's order dismissing the case. AFMS filed a petition for rehearing in September 2017, which was denied. AFMS filed a Petition for Writ of Certiorari in the Supreme Court, which was denied on February 26, 2018. The Antitrust Division of the U.S. Department of Justice (“DOJ”) opened a civil investigation of our policies and practices for dealing with third-party negotiators. These matters are now concluded with no liability to UPS. We are a defendant in Ryan Wright and Julia Zislin v. United Parcel Service Canada Ltd., an action brought on behalf of a certified class of customers in the Superior Court of Justice in Ontario, Canada. Plaintiffs filed suit in February 2007, alleging inadequate disclosure concerning the existence and cost of brokerage services provided by us under applicable provincial consumer protection legislation and infringement of interest restriction provisions under the Criminal Code of Canada. Partial summary judgment was granted to us and the plaintiffs by the Ontario motions court in August 2011, when it dismissed plaintiffs' complaint under the Criminal Code and granted plaintiffs' complaint of inadequate disclosure. We appealed the Court's decision pertaining to inadequate disclosure in September 2011. In October 2017, we reached an agreement in principle to resolve the case for an immaterial amount. Final resolution of this matter is subject to the negotiation, execution and delivery of a settlement agreement and court approval. In February 2015, the State and City of New York filed suit against UPS in the U.S. District Court for the Southern District of New York, arising from alleged shipments of cigarettes to New York State and City residents. The complaint asserted claims under various federal and state laws. The complaint also included a claim that UPS violated the Assurance of Discontinuance it entered into with the New York Attorney General in 2005 concerning cigarette deliveries. On March 24, 2017, the District Court issued an opinion and order finding liability against UPS on each of the plaintiffs’ causes of action. On May 25, 2017, the District Court issued a corrected opinion and order on liability and an order awarding the plaintiffs damages of $ 9.4 million and penalties of $ 237.6 million. An accrual of $ 9.4 million with respect to the damages awarded by the court is included on our consolidated balance sheet at March 31, 2018 . We estimate that the amount of losses could be up to $ 247 million, plus interest; however, the amount of penalties ultimately payable, if any, is subject to a variety of complex factors and potential outcomes that remain to be determined in future legal proceedings. Consequently, we are unable to reasonably estimate a likely amount of loss within that range. We strongly disagree with the District Court’s analysis and conclusions, and have appealed to the United States Court of Appeals for the Second Circuit. UPS filed its opening brief with the Appellate Court in October 2017 the State and City of New York filed their brief on February 21, 2018. We expect oral argument will be scheduled during 2018. Other Matters In October 2015, the DOJ informed us of an industry-wide inquiry into the transportation of mail under the United States Postal Service ("USPS") International Commercial Air contracts. In October 2017, we received a Civil Investigative Demand seeking certain information relating to our contracts. The DOJ has indicated it is investigating potential violations of the False Claims Act or other statutes. We are cooperating with the DOJ. The Company is unable to predict what action, if any, might be taken in the future by any government authorities as a result of their investigation. Accordingly, at this time, we are not able to estimate a possible loss or range of loss that may result from this matter or to determine whether such loss, if any, would have a material adverse effect on our financial condition, results of operations or liquidity. In August 2016, Spain’s National Markets and Competition Commission (“CNMC”) opened an investigation into 10 companies in the commercial delivery and parcel industry, including UPS, related to alleged agreements to allocate customers. In May 2017, UPS received a Statement of Objections issued by the CNMC. In July 2017, UPS received a Proposed Decision from the CNMC. On March 8, 2018, the CNMC adopted a final decision, finding an infringement and imposing a fine on UPS of € 19.2 million. UPS will seek a suspension of the implementation of the decision (including payment of the fine) and intends to appeal the decision on the merits. There are multiple factors that prevent us from being able to estimate the amount of loss, if any, that may result from this matter, including: (1) we are vigorously defending ourselves and believe that we have a number of meritorious legal defenses; and (2) there are unresolved questions of law and fact that could be important to the ultimate resolution of this matter. Accordingly, at this time, we are not able to estimate a possible loss or range of loss that may result from this matter or to determine whether such loss, if any, would have a material adverse effect on our financial condition, results of operations or liquidity. In February 2018 the Turkish competition authority opened an investigation into nine companies (including UPS) in the small package industry related to alleged customer allocations in violation of Turkish competition law. The investigation is in its early stages. There are multiple factors that prevent us from being able to estimate the amount of loss, if any, that may result from this matter, including: (1) we are vigorously defending ourselves and believe that we have a number of meritorious legal defenses; and (2) there are unresolved questions of law and fact that could be important to the ultimate resolution of this matter. Accordingly, at this time, we are not able to estimate a possible loss or range of loss that may result from this matter or to determine whether such loss, if any, would have a material adverse effect on our financial condition, results of operations or liquidity. We are a defendant in various other lawsuits that arose in the normal course of business. We do not believe that the eventual resolution of these other lawsuits (either individually or in the aggregate), including any reasonably possible losses in excess of current accruals, will have a material adverse effect on our financial condition, results of operations or liquidity.

SHAREOWNERS' EQUITY

SHAREOWNERS' EQUITY	3 Months Ended
	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
SHAREOWNERS' EQUITY	SHAREOWNERS' EQUITY Capital Stock, Additional Paid-In Capital and Retained Earnings We maintain two classes of common stock, which are distinguished from each other primarily by their respective voting rights. Class A shares are entitled to 10 votes per share, whereas class B shares are entitled to one vote per share. Class A shares are primarily held by UPS employees and retirees, and these shares are fully convertible on a one-to-one basis into class B shares at any time. Class B shares are publicly traded on the New York Stock Exchange under the symbol “UPS”. Class A and B shares both have a $0.01 par value, and as of March 31, 2018 , there were 4.6 billion class A shares and 5.6 billion class B shares authorized to be issued. Additionally, there are 200 million preferred shares, with a $0.01 par value, authorized to be issued. As of March 31, 2018 , no preferred shares had been issued. The following is a rollforward of our common stock, additional paid-in capital and retained earnings accounts for the three months ended March 31, 2018 and 2017 (in millions, except per share amounts): 2018 2017 Shares Dollars Shares Dollars Class A Common Stock Balance at beginning of period 173 $ 2 180 $ 2 Common stock purchases (1 ) — (1 ) — Stock award plans 3 — 3 — Common stock issuances 2 — 1 — Conversions of class A to class B common stock (3 ) — (3 ) — Class A shares issued at end of period 174 $ 2 180 $ 2 Class B Common Stock Balance at beginning of period 687 $ 7 689 $ 7 Common stock purchases (1 ) — (3 ) — Conversions of class A to class B common stock 3 — 3 — Class B shares issued at end of period 689 $ 7 689 $ 7 Additional Paid-In Capital Balance at beginning of period $ — $ — Stock award plans 20 15 Common stock purchases (136 ) (174 ) Common stock issuances 155 132 Option premiums received (paid) (39 ) 27 Balance at end of period $ — $ — Retained Earnings Balance at beginning of period $ 5,852 $ 4,880 Net income attributable to common shareowners 1,345 1,166 Dividends ($0.91 and $0.83 per share) (840 ) (774 ) Common stock purchases (119 ) (275 ) Reclassification from AOCI pursuant to the early adoption of ASU 2018-02 735 — Balance at end of period $ 6,973 $ 4,997 We repurchased 2.2 million shares of class A and class B common stock for $255 million during the three months ended March 31, 2018 , and 4.2 million shares for $449 million during the three months ended March 31, 2017 . In May 2016, the Board of Directors approved a share repurchase authorization of $8.0 billion, which has no expiration date. As of March 31, 2018 , we had $4.084 billion of this share repurchase authorization available. From time to time, we enter into share repurchase programs with large financial institutions to assist in our buyback of company stock. These programs allow us to repurchase our shares at a price below the weighted average UPS share price for a given period. During the first quarter of 2018, we did not enter into any accelerated share repurchase transactions. In order to lower the average cost of acquiring shares in our ongoing share repurchase program, we periodically enter into structured repurchase agreements involving the use of capped call options for the purchase of UPS class B shares. We pay a fixed sum of cash upon execution of each agreement in exchange for the right to receive either a pre-determined amount of cash or stock. Upon expiration of each agreement, if the closing market price of our common stock is above the pre-determined price, we will have our initial investment returned with a premium in either cash or shares (at our election). If the closing market price of our common stock is at or below the pre-determined price, we will receive the number of shares specified in the agreement. We paid net premiums of $39 million during the first three months of 2018 and received $27 million during the first three months 2017 , related to entering into and settling capped call options for the purchase of class B shares. As of March 31, 2018 , we had outstanding options for the purchase of 0.9 million shares with a weighted average strike price of $102.57 per share that will settle during 2018. Accumulated Other Comprehensive Income (Loss) We recognize activity in AOCI for unrealized holding gains and losses on available-for-sale securities, foreign currency translation adjustments, unrealized gains and losses from derivatives that qualify as hedges of cash flows and unrecognized pension and postretirement benefit costs. Additionally, effective January 1, 2018, we early adopted an ASU that allows a reclassification from AOCI to retained earnings for stranded tax effects resulting from the Tax Act (see note 2 for further information). The activity in AOCI for the three months ended March 31, 2018 and 2017 is as follows (in millions): 2018 2017 Foreign currency translation gain (loss), net of tax: Balance at beginning of period $ (930 ) $ (1,016 ) Translation adjustment (net of tax effect of $(9) and $(14)) (6 ) 30 Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02 (47 ) — Balance at end of period (983 ) (986 ) Unrealized gain (loss) on marketable securities, net of tax: Balance at beginning of period (2 ) (1 ) Current period changes in fair value (net of tax effect of $(1) and $0) (4 ) — Reclassification to earnings (net of tax effect of $1 and $0) 1 — Balance at end of period (5 ) (1 ) Unrealized gain (loss) on cash flow hedges, net of tax: Balance at beginning of period (366 ) (45 ) Current period changes in fair value (net of tax effect of $(33) and $(17)) (102 ) (30 ) Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02 (79 ) — Reclassification to earnings (net of tax effect of $12 and $(7)) 36 (11 ) Balance at end of period (511 ) (86 ) Unrecognized pension and postretirement benefit costs, net of tax: Balance at beginning of period (3,569 ) (3,421 ) Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02 (609 ) — Reclassification to earnings (net of tax effect of $12 and $18) 39 32 Balance at end of period (4,139 ) (3,389 ) Accumulated other comprehensive income (loss) at end of period $ (5,638 ) $ (4,462 ) Detail of the gains (losses) reclassified from AOCI to the statements of consolidated income for the three months ended March 31, 2018 and 2017 is as follows (in millions): Three Months Ended March 31: Amount Reclassified from AOCI Affected Line Item in the Income Statement 2018 2017 Unrealized gain (loss) on marketable securities: Realized loss on sale of securities $ (2 ) $ — Investment income Income tax expense 1 — Income tax expense Impact on net income (1 ) — Net income Unrealized gain (loss) on cash flow hedges: Interest rate contracts (6 ) (7 ) Interest expense Foreign exchange contracts (42 ) 25 Revenue Income tax (expense) benefit 12 (7 ) Income tax expense Impact on net income (36 ) 11 Net income Unrecognized pension and postretirement benefit costs: Prior service costs (51 ) (50 ) Compensation and benefits Income tax benefit 12 18 Income tax expense Impact on net income (39 ) (32 ) Net income Total amount reclassified for the period $ (76 ) $ (21 ) Net income Deferred Compensation Obligations and Treasury Stock Activity in the deferred compensation program for the three months ended March 31, 2018 and 2017 is as follows (in millions): 2018 2017 Shares Dollars Shares Dollars Deferred Compensation Obligations: Balance at beginning of period $ 37 $ 45 Reinvested dividends 1 1 Benefit payments (7 ) (10 ) Balance at end of period $ 31 $ 36 Treasury Stock: Balance at beginning of period (1 ) $ (37 ) (1 ) $ (45 ) Reinvested dividends — (1 ) — (1 ) Benefit payments — 7 — 10 Balance at end of period (1 ) $ (31 ) (1 ) $ (36 ) Noncontrolling Interests: We have noncontrolling interests in certain consolidated subsidiaries in our International Package and Supply Chain & Freight segments. Noncontrolling interests increased $1 million for the three months ended March 31, 2018 and 2017 , respectively.

SEGMENT INFORMATION

SEGMENT INFORMATION	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION We report our operations in three segments: U.S. Domestic Package operations, International Package operations and Supply Chain & Freight operations. Package operations represent our most significant business and are broken down into regional operations around the world. Regional operations managers are responsible for both domestic and export products within their geographic area. U.S. Domestic Package Domestic Package operations include the time-definite delivery of letters, documents and packages throughout the United States. International Package International Package operations include delivery to more than 220 countries and territories worldwide, including shipments wholly outside the United States, as well as shipments with either origin or destination outside the United States. Our International Package reporting segment includes the operations of our Europe, Asia, Americas and ISMEA (Indian Subcontinent, Middle East and Africa) operating segments. Supply Chain & Freight Supply Chain & Freight includes our Forwarding, Logistics, Coyote, Marken, UPS Mail Innovations, UPS Freight and other aggregated business units. Our Forwarding, Logistics and UPS Mail Innovations business units provide services in more than 200 countries and territories worldwide and include international air and ocean freight forwarding, customs brokerage, distribution and post-sales services, mail and consulting services. UPS Freight offers a variety of less-than-truckload ("LTL") and truckload ("TL") services to customers in North America. Coyote offers truckload brokerage services primarily in the United States. Marken is a global provider of supply chain solutions to the life sciences industry. Other aggregated business units within this segment include The UPS Store and UPS Capital. In evaluating financial performance, we focus on operating profit as a segment’s measure of profit or loss. Operating profit is before investment income and other, interest expense and income taxes. The accounting policies of the reportable segments are the same as those described in the summary of accounting policies included in the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2017 and updated in note 3 for newly adopted accounting standards. Certain expenses are allocated between the segments using activity-based costing methods. Segment information for the three months ended March 31, 2018 and 2017 is as follows (in millions): Three Months Ended 2018 2017 Revenue: U.S. Domestic Package $ 10,227 $ 9,536 International Package 3,533 3,074 Supply Chain & Freight 3,353 2,900 Consolidated $ 17,113 $ 15,510 Operating Profit: U.S. Domestic Package $ 756 $ 950 International Package 594 518 Supply Chain & Freight 170 149 Consolidated $ 1,520 $ 1,617

EARNINGS PER SHARE

EARNINGS PER SHARE	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The earnings per share amounts are the same for class A and class B common shares as the holders of each class are legally entitled to equal per share distributions whether through dividends or in liquidation. The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2018 and 2017 (in millions, except per share amounts): Three Months Ended 2018 2017 Numerator: Net income attributable to common shareowners $ 1,345 $ 1,166 Denominator: Weighted average shares 861 869 Deferred compensation obligations 1 1 Vested portion of restricted units 4 4 Denominator for basic earnings per share 866 874 Effect of dilutive securities: Restricted units 4 4 Stock options — 1 Denominator for diluted earnings per share 870 879 Basic earnings per share $ 1.55 $ 1.33 Diluted earnings per share $ 1.55 $ 1.33 Diluted earnings per share for the three months ended March 31, 2018 and 2017 excluded the effect of 0.3 million shares of common stock that may be issued upon the exercise of employee stock options because such effect would be antidilutive.

DERIVATIVE INSTRUMENTS AND RISK

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT	DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT Risk Management Policies Changes in fuel prices, interest rates and foreign exchange rates impact our results of operations. These exposures are actively monitored by management. To manage the impact of these exposures, we enter into a variety of derivative financial instruments. Our objective is to manage, where it is deemed appropriate to do so, fluctuations in earnings and cash flows associated with changes in foreign currency rates, commodity prices and interest rates. It is our policy and practice to use derivative financial instruments only to the extent necessary to manage exposures. As we use price sensitive instruments to hedge a certain portion of our existing and anticipated transactions, we expect that any loss in value for those instruments generally would be offset by increases in the value of those hedged transactions. We do not hold or issue derivative financial instruments for trading or speculative purposes. Credit Risk Management The forward contracts, swaps and options discussed below contain an element of risk that the counterparties may be unable to meet the terms of the agreements; however, we minimize such risk exposures for these instruments by limiting the counterparties to banks and financial institutions that meet established credit guidelines, and by monitoring counterparty credit risk to prevent concentrations of credit risk with any single counterparty. We have agreements with all of our active counterparties (covering the majority of our derivative positions) containing early termination rights and/or zero threshold bilateral collateral provisions whereby cash is required based on the net fair value of derivatives associated with those counterparties. At March 31, 2018 and December 31, 2017 , we held cash collateral of $ 0 and $ 17 million, respectively, under these agreements; this collateral is included in "Cash and cash equivalents" on the consolidated balance sheets and its use by UPS is not restricted. At March 31, 2018 and December 31, 2017 , $406 and $174 million , respectively, of additional collateral was required to be posted with our counterparties. Events such as a counterparty credit rating downgrade (depending on the ultimate rating level) could also allow us to take additional protective measures such as the early termination of trades. Alternatively, we could be required to provide additional collateral or terminate transactions with certain counterparties in the event of a downgrade of our credit rating. The amount of collateral required would be determined by the net fair value of the associated derivatives with each counterparty. We have not historically incurred, and do not expect to incur in the future, any losses as a result of counterparty default. The aggregate fair value of instruments not covered by the zero threshold bilateral collateral provisions were in a net liability position of $0 and $16 million at March 31, 2018 and December 31, 2017 , respectively. Accounting Policy for Derivative Instruments We recognize all derivative instruments as assets or liabilities in the consolidated balance sheets at fair value. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, further, on the type of hedging relationship. For those derivative instruments that are designated and qualify as hedging instruments, a company must designate the derivative, based upon the exposure being hedged, as a cash flow hedge, a fair value hedge or a hedge of a net investment in a foreign operation. A cash flow hedge refers to hedging the exposure to variability in expected future cash flows that is attributable to a particular risk. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative instrument is reported as a component of AOCI, and reclassified into earnings in the same period during which the hedged transaction affects earnings. The remaining gain or loss on the derivative instrument in excess of the cumulative change in the present value of future cash flows of the hedged item, or hedge components excluded from the assessment of effectiveness, are recognized in the statements of consolidated income during the current period. A fair value hedge refers to hedging the exposure to changes in the fair value of an existing asset or liability on the consolidated balance sheets that is attributable to a particular risk. For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument is recognized in the statements of consolidated income during the current period, as well as the offsetting gain or loss on the hedged item. A net investment hedge refers to the use of cross currency swaps, forward contracts or foreign currency denominated debt to hedge portions of our net investments in foreign operations. For hedges that meet the effectiveness requirements, the net gains or losses attributable to changes in spot exchange rates are recorded in the foreign currency translation adjustment within AOCI. The remainder of the change in value of such instruments is recorded in earnings. Types of Hedges Commodity Risk Management Currently, the fuel surcharges that we apply to our domestic and international package and LTL services are the primary means of reducing the risk of adverse fuel price changes on our business. In order to mitigate the impact of fuel surcharge imposed on us by outside carriers, we regularly adjust the rates we charge for our freight brokerage, inter-modal and truckload services. We periodically enter into derivative contracts on energy commodity products to manage the price risk associated with forecasted transactions involving refined fuels, principally jet-A, diesel and unleaded gasoline. The objective of the hedges is to reduce the variability of cash flows, due to changing fuel prices, associated with the forecasted transactions involving those products. We normally designate and account for these contracts as cash flow hedges of the underlying forecasted transactions involving these fuel products and, therefore, the resulting gains and losses from these hedges are recognized as a component of fuel expense or revenue when the underlying transactions occur. Foreign Currency Risk Management To protect against the reduction in value of forecasted foreign currency cash flows from our international package business, we maintain a foreign currency cash flow hedging program. Our most significant foreign currency exposures relate to the Euro, British Pound Sterling, Canadian Dollar, Chinese Renminbi and Hong Kong Dollar. We hedge portions of our forecasted revenue denominated in foreign currencies with option and forward contracts. We normally designate and account for these contracts as cash flow hedges of anticipated foreign currency denominated revenue and, therefore, the resulting gains and losses from these hedges are recognized as a component of international package revenue when the underlying sales transactions occur. We also hedge portions of our anticipated cash settlements of intercompany transactions and interest payments on certain debt subject to foreign currency remeasurement using foreign currency forward contracts. We normally designate and account for these contracts as cash flow hedges of forecasted foreign currency denominated transactions; therefore, the resulting gains and losses from these hedges are recognized as a component of investment income and other when the underlying transactions are subject to currency remeasurement. We hedge our net investment in certain foreign operations with foreign currency denominated debt instruments. The use of foreign denominated debt as the hedging instrument allows the debt to be remeasured to foreign currency translation adjustment within AOCI to offset the translation risk from those investments. Any ineffective portion of net investment hedging is recognized as a component of investment income and other. Balances in the cumulative translation adjustment accounts remain until the sale or complete liquidation of the foreign entity. Interest Rate Risk Management Our indebtedness under our various financing arrangements creates interest rate risk. We use a combination of derivative instruments as part of our program to manage the fixed and floating interest rate mix of our total debt portfolio and related overall cost of borrowing. The notional amount, interest payment date and maturity date of the swaps match the terms of the associated debt being hedged. Interest rate swaps allow us to maintain a target range of floating-rate debt within our capital structure. We have designated and account for the majority of our interest rate swaps that convert fixed-rate interest payments into floating-rate interest payments as hedges of the fair value of the associated debt instruments. Therefore, the gains and losses resulting from fair value adjustments to the interest rate swaps and fair value adjustments to the associated debt instruments are recorded to interest expense in the period in which the gains and losses occur. We have designated and account for interest rate swaps that convert floating-rate interest payments into fixed-rate interest payments as cash flow hedges of the forecasted payment obligations. The gains and losses resulting from fair value adjustments to the interest rate swaps are recorded to AOCI. We periodically hedge the forecasted fixed-coupon interest payments associated with anticipated debt offerings by using forward starting interest rate swaps, interest rate locks or similar derivatives. These agreements effectively lock a portion of our interest rate exposure between the time the agreement is entered into and the date when the debt offering is completed, thereby mitigating the impact of interest rate changes on future interest expense. These derivatives are settled commensurate with the issuance of the debt, and any gain or loss upon settlement is amortized as an adjustment to the effective interest yield on the debt. Outstanding Positions As of March 31, 2018 and December 31, 2017 , the notional amounts of our outstanding derivative positions were as follows (in millions): March 31, 2018 December 31, 2017 Currency hedges: Euro EUR 4,652 EUR 4,942 British Pound Sterling GBP 1,785 GBP 1,736 Canadian Dollar CAD 1,393 CAD 1,259 Mexican Peso MXN — MXN 169 Singapore Dollar SGD 21 SGD 11 Interest rate hedges: Fixed to Floating Interest Rate Swaps $ 4,674 $ 5,424 Floating to Fixed Interest Rate Swaps $ 778 $ 778 Investment market price hedges: Marketable Securities EUR — EUR 64 As of March 31, 2018 , we had no outstanding commodity hedge positions. Balance Sheet Recognition and Fair Value Measurements The following table indicates the location on the consolidated balance sheets in which our derivative assets and liabilities have been recognized, the fair value hierarchy level applicable to each derivative type and the related fair values of those derivatives (in millions). The table is segregated between those derivative instruments that qualify and are designated as hedging instruments and those that are not, as well as by type of contract and whether the derivative is in an asset or liability position. We have master netting arrangements with substantially all of our counterparties giving us the right of offset for our derivative positions. However, we have not elected to offset the fair value positions of our derivative contracts recorded on our consolidated balance sheets. The columns labeled "Net Amounts if Right of Offset had been Applied" indicate the potential net fair value positions by type of contract and location on the consolidated balance sheets had we elected to apply the right of offset. Fair Value Hierarchy Level Gross Amounts Presented in Consolidated Balance Sheets Net Amounts if Right of Offset had been Applied Asset Derivatives Balance Sheet Location March 31, December 31, March 31, December 31, Derivatives designated as hedges: Foreign exchange contracts Other current assets Level 2 $ 4 $ 2 $ — $ — Interest rate contracts Other current assets Level 2 — 1 — 1 Foreign exchange contracts Other non-current assets Level 2 9 1 — — Interest rate contracts Other non-current assets Level 2 31 59 10 43 Derivatives not designated as hedges: Foreign exchange contracts Other current assets Level 2 14 18 16 17 Foreign exchange contracts Other non-current assets Level 2 8 — 8 — Interest rate contracts Other non-current assets Level 2 24 26 24 26 Total Asset Derivatives $ 90 $ 107 $ 58 $ 87 Fair Value Hierarchy Level Gross Amounts Presented in Consolidated Balance Sheets Net Amounts if Right of Offset had been Applied Liability Derivatives Balance Sheet Location March 31, December 31, March 31, December 31, Derivatives designated as hedges: Foreign exchange contracts Other current liabilities Level 2 $ 144 $ 93 $ 140 $ 91 Interest rate contracts Other current liabilities Level 2 — — — — Foreign exchange contracts Other non-current liabilities Level 2 249 194 240 193 Interest rate contracts Other non-current liabilities Level 2 51 28 30 12 Derivatives not designated as hedges: Foreign exchange contracts Other current liabilities Level 2 15 1 17 — Investment market price contracts Other current liabilities Level 2 — 16 — 16 Foreign exchange contracts Other non-current liabilities Level 2 7 — 7 — Interest rate contracts Other non-current liabilities Level 2 — — — — Total Liability Derivatives $ 466 $ 332 $ 434 $ 312 Our foreign currency, interest rate and investment market price derivatives are largely comprised of over-the-counter derivatives, which are primarily valued using pricing models that rely on market observable inputs such as yield curves, currency exchange rates and investment forward prices; therefore, these derivatives are classified as Level 2. Income Statement and AOCI Recognition The following table indicates the amount of gains and losses that have been recognized in AOCI for the three months ended March 31, 2018 and 2017 for those derivatives designated as cash flow hedges (in millions): Three Months Ended March 31: Derivative Instruments in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) 2018 2017 Interest rate contracts $ 1 $ — Foreign exchange contracts (136 ) (47 ) Total $ (135 ) $ (47 ) As of March 31, 2018 , there are $ 198 million of pre-tax losses related to cash flow hedges that are currently deferred in AOCI that are expected to be reclassified to income over the 12 month period ended March 31, 2019 . The actual amounts that will be reclassified to income over the next 12 months will vary from this amount as a result of changes in market conditions. The maximum term over which we are hedging exposures to the variability of cash flow is approximately 15 years. The amount of ineffectiveness recognized in income on derivative instruments designated in cash flow hedging relationships was immaterial for the three months ended March 31, 2018 and 2017 . The following table indicates the amount of gains and losses that have been recognized in AOCI within foreign currency translation adjustment for the three months ended March 31, 2018 and 2017 for those instruments designated as net investment hedges (in millions): Three Months Ended March 31: Non-derivative Instruments in Net Investment Hedging Relationships Amount of Gain (Loss) Recognized in AOCI on Debt (Effective Portion) 2018 2017 Foreign denominated debt $ (80 ) $ (37 ) Total $ (80 ) $ (37 ) The amount of ineffectiveness recognized in income on non-derivative instruments designated in net investment hedging relationships was immaterial for the three months ended March 31, 2018 and 2017 . The following table indicates the amount and location in the statements of consolidated income in which derivative gains and losses, as well as the associated gains and losses on the underlying exposure, have been recognized for those derivatives designated as fair value hedges for the three months ended March 31, 2018 and 2017 (in millions): Derivative Instruments in Fair Value Hedging Relationships Location of Gain (Loss) Recognized in Income Derivative Amount of Gain (Loss) Recognized in Income Hedged Items in Fair Value Hedging Relationships Location of Gain (Loss) Recognized In Income Hedged Items Amount of Gain (Loss) Recognized in Income 2018 2017 2018 2017 Interest rate contracts Interest Expense $ (54 ) $ (24 ) Fixed-Rate Debt Interest Expense $ 54 $ 24 Additionally, we maintain some interest rate swaps, foreign currency forwards and investment market price forward contracts that are not designated as hedges. These interest rate swap contracts are intended to provide an economic hedge of portions of our outstanding debt. These foreign exchange forward contracts are intended to provide an economic offset to foreign currency remeasurement and settlement risk for certain assets and liabilities on our consolidated balance sheets. These investment market price forward contracts are intended to provide an economic offset to fair value fluctuations of certain investments in marketable securities. We also periodically terminate interest rate swaps and foreign currency options by entering into offsetting swap and foreign currency positions with different counterparties. As part of this process, we de-designate our original swap and foreign currency contracts. These transactions provide an economic offset that effectively eliminates the effects of changes in market valuation. The following is a summary of the amounts recorded in the statements of consolidated income related to fair value changes and settlements of these interest rate swaps, foreign currency forward and investment market price forward contracts not designated as hedges for the three months ended March 31, 2018 and 2017 (in millions): Derivative Instruments Not Designated in Hedging Relationships Location of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income 2018 2017 Three Months Ended March 31: Interest rate contracts Interest expense $ (2 ) $ (2 ) Foreign exchange contracts Investment income and other 8 6 Investment market price contracts Investment income and other 16 26 Total $ 22 $ 30

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Our effective tax rate for the three months ended March 31, 2018 was approximately 19.0% compared with 31.8% in the same period of 2017. The decrease in our effective tax rate was primarily due to the impact of the Tax Act, discussed further below, which reduced the U.S. federal corporate income tax rate from 35% to 21% effective January 1, 2018. In addition, the recognition of excess tax benefits related to share-based compensation in income tax expense reduced our effective tax rate by 2.7% for the three months ended March 31, 2018 compared to 3.2% in the same period of 2017. Other factors that impacted our effective tax rate in the first quarter of 2018 compared with the same period of 2017 include favorable resolutions of uncertain tax positions and favorable tax provisions enacted in the Bipartisan Budget Act of 2018. As discussed in our Annual Report on Form 10-K for the year ended December 31, 2017 , we have recognized liabilities for uncertain tax positions. We reevaluate these uncertain tax positions on a quarterly basis. A number of years may elapse before an uncertain tax position is audited and ultimately settled. It is difficult to predict the ultimate outcome or the timing of resolution for uncertain tax positions. It is reasonably possible that the amount of unrecognized tax benefits could significantly increase or decrease within the next twelve months. However, an estimate of the range of reasonably possible outcomes cannot be made. Items that may cause changes to unrecognized tax benefits include the timing of interest deductions and the allocation of income and expense between tax jurisdictions. These changes could result from the settlement of ongoing litigation, the completion of ongoing examinations, the expiration of the statute of limitations or other unforeseen circumstances. Tax Cuts and Jobs Act On December 22, 2017, the United States enacted into law the Tax Act. The Tax Act makes broad and complex changes to the U.S. tax code, including a permanent corporate rate reduction to 21% and a transition to a territorial international system effective in 2018. The Tax Act also includes provisions that affected 2017, including: (1) requiring a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries ("Transition Tax") that is payable over eight years; (2) requiring a remeasurement of all U.S. deferred tax assets and liabilities to the newly enacted corporate tax rate of 21% ; and (3) providing for additional first-year depreciation that allows full expensing of qualified property placed into service after September 27, 2017. In late December 2017, the SEC staff issued SAB 118, which provides guidance on accounting for the tax effects of the Tax Act. SAB 118 provides a measurement period that should not extend beyond one year from the Tax Act enactment date for companies to complete the related accounting under U.S. GAAP. If a company's accounting for certain income tax effects of the Tax Act is incomplete, but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. Accordingly, we recorded provisional estimates in the year ended December 31, 2017 related to our Transition Tax liability, our change in indefinite reinvestment assertion for certain foreign subsidiaries and the remeasurement of our U.S. net deferred tax liabilities. To calculate the amount of Transition Tax, we must determine, in addition to other factors, the amount of post-1986 earnings and profits ("E&P") of the foreign subsidiaries as well as the amount of non-U.S. income taxes paid on such earnings. We were able to make a reasonable estimate of the Transition Tax and recorded a provisional liability of $310 million in the year ended December 31, 2017; however, there are certain factors that could impact our provisional estimate. First, several of our foreign subsidiaries have a fiscal year-end other than December 31, and E&P for these subsidiaries cannot be precisely calculated until their fiscal years conclude during 2018. Second, we continue to gather additional information needed to precisely estimate the impact of the Transition Tax on our U.S. state and local tax liabilities given the complexity of the relevant state laws. Finally, we expect additional regulatory guidance and technical clarifications from the U.S. Department of the Treasury and Internal Revenue Service that could change our provisional estimate of the Transition Tax. As the U.S. has moved to a territorial system, we have changed our indefinite reinvestment assertion with respect to the earnings of certain foreign subsidiaries. As a result, we recorded a provisional deferred tax liability and corresponding increase to deferred tax expense of $24 million in the year ended December 31, 2017. There are certain factors, discussed above with regard to the Transition Tax, which could also impact our provisional estimate for the change in indefinite reinvestment assertion. For all other foreign subsidiaries, we continue to assert that these earnings are indefinitely reinvested. We will continue to evaluate our indefinite reinvestment assertion for all foreign subsidiaries in light of the Tax Act and our provisional estimate is subject to change. For our net U.S. deferred tax liabilities, we recorded a provisional decrease of $ 606 million with a corresponding reduction to deferred tax expense of $606 million for the year ended December 31, 2017. While we are able to make a reasonable estimate of the impact of the reduction in corporate rate, it may be affected by other analyses related to the Tax Act, including, but not limited to, completing the analysis of our 2017 capital expenditures that qualify for full expensing and the state tax effect of adjustments made to federal temporary differences. We have not made any measurement period adjustments related to our provisional estimates during the first quarter of 2018. We are continuing to gather additional information to complete our accounting for these items and expect to complete our accounting within the prescribed measurement period.

SUBSEQUENT EVENT (Notes)

SUBSEQUENT EVENT (Notes)	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On April 25, 2018, we announced that a select group of non-operations, retirement-eligible U.S. management employees were informed of their eligibility for participation in a special Voluntary Retirement Plan (VRP). Under the VRP, eligible employees will be offered a financial buyout to retire. The voluntary retirement program is designed to occur in phases to help maintain an orderly transition among those eligible to retire. The special VRP offer does not change the design, nor eligibility for, UPS retirement plans. This initiative will reduce headcount and lower on-going operating expense.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation	Principles of Consolidation In our opinion, the accompanying interim, unaudited, consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. These consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly our financial position as of March 31, 2018 , our results of operations for the three months ended March 31, 2018 and 2017 , and cash flows for the three months ended March 31, 2018 and 2017 . The results reported in these consolidated financial statements should not be regarded as necessarily indicative of results that may be expected for any other period or the entire year. The interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017 . For interim consolidated financial statement purposes, we provide for accruals under our various employee benefit plans for each three month period based on one quarter of the estimated annual expense. Certain prior year amounts have been reclassified to conform to the current year presentation. These reclassifications had no material impact on our financial position or results of operations.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts of our cash and cash equivalents, accounts receivable, finance receivables and accounts payable approximate fair value as of March 31, 2018 . The fair values of our investment securities are disclosed in note 5 , our recognized multiemployer pension withdrawal liabilities in note 7 , our short and long-term debt in note 9 and our derivative instruments in note 14 . We utilized Level 1 inputs in the fair value hierarchy of valuation techniques to determine the fair value of our cash and cash equivalents, and Level 2 inputs to determine the fair value of our accounts receivable, finance receivables and accounts payable.
Accounting Estimates	Accounting Estimates The preparation of the accompanying interim, unaudited, consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingencies at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Estimates have been prepared on the basis of the most current and best information and actual results could differ materially from those estimates.
Change in Accounting Methodology	The preparation of the accompanying interim, unaudited, consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingencies at the date of the consolidated financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Estimates have been prepared on the basis of the most current and best information and actual results could differ materially from those estimates.
Adoption of New Accounting Standards	Adoption of New Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued an accounting standards update ("ASU") that changes the revenue recognition for companies that enter into contracts with customers to transfer goods or services (" Revenue from Contracts with Customers") . The standard is a comprehensive new revenue recognition model that requires revenue to be recognized in a manner depicting the transfer of goods or services to a customer at an amount that reflects the consideration expected to be received in exchange for those goods or services. The FASB has also issued a number of updates to this standard. Effective January 1, 2018, we adopted the requirements of this ASU using the full retrospective method. See note 3 for required disclosures pertaining to the new ASU. In November 2016, the FASB issued an ASU that is intended to reduce diversity in practice by adding or clarifying guidance on classification and presentation of changes in restricted cash on the statement of cash flows (" Restricted Cash") . As a result of this update, restricted cash is included within cash and cash equivalents on our statements of consolidated cash flows. Effective January 1, 2018, we adopted the requirements of this ASU retrospectively. In March 2017, the FASB issued an ASU to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost (" Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost") . The update requires employers to report the current service cost component in the same line item as other compensation costs arising from services rendered by employees during the period. The other components of net benefit cost are required to be presented separately from service cost and outside of income from operations. As a result of this update, the net amount of interest cost, prior service cost and expected return on plan assets is now presented as other income. Effective January 1, 2018, we adopted the requirements of this ASU retrospectively, as required. We have recast our consolidated financial statements from amounts previously reported due to the adoption of new revenue recognition, pension and restricted cash standards. Impacted consolidated balance sheet line items, which reflect the adoption of the new ASUs, are as follows (in millions): December 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Assets: Other current assets $ 1,133 $ 170 $ — $ — $ 1,303 Total current assets 15,548 170 — — 15,718 Deferred income tax assets 265 1 — — 266 Total Assets $ 45,403 $ 171 $ — $ — $ 45,574 Liabilities: Accounts payable $ 3,872 $ 62 $ — $ — $ 3,934 Accrued wages and withholdings 2,521 87 — — 2,608 Other current liabilities (1) 905 29 — — 934 Total current liabilities 12,708 178 — — 12,886 Deferred income tax liabilities 757 (1 ) — — 756 Shareowners' Equity: Retained earnings 5,858 (6 ) — — 5,852 Total Shareowners' Equity 1,030 (6 ) — — 1,024 Total Liabilities and Shareowners' Equity $ 45,403 $ 171 $ — $ — $ 45,574 (1) The caption "Other current liabilities" was presented separately from "Hedge margin liabilities" of $17 million in the Form 10-K at December 31, 2017. These captions have been collapsed in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 included within this Form 10-Q. The unaudited consolidated statement of operations, which reflects the adoption of the new ASUs, is as follows (in millions): Three months ended March 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Revenue $ 15,315 $ 195 $ — $ — $ 15,510 Operating Expenses: Compensation and benefits 8,131 — 180 — 8,311 Repairs and maintenance 390 — — — 390 Depreciation and amortization 554 — — — 554 Purchased Transportation 2,366 179 — — 2,545 Fuel 621 — — — 621 Other occupancy 299 — — — 299 Other expenses 1,170 3 — — 1,173 Total Operating Expenses 13,531 182 180 — 13,893 Operating Profit 1,784 13 (180 ) — 1,617 Other Income and (Expense): Investment income and other 15 — 180 — 195 Interest expense (102 ) — — — (102 ) Total Other Income and (Expense) (87 ) — 180 — 93 Income Before Income Taxes 1,697 13 — — 1,710 Income Tax Expense 539 5 — — 544 Net Income $ 1,158 $ 8 $ — $ — $ 1,166 Basic earnings per share $ 1.32 $ 0.01 $ — $ — $ 1.33 Diluted earnings per share $ 1.32 $ 0.01 $ — $ — $ 1.33 (a) Recast to reflect the adoption of Revenue from Contracts with Customers. (b) Recast to reflect the adoption of Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. (c) Recast to reflect the adoption of Restricted Cash. The unaudited impacted consolidated statement of cash flows line items, which reflect the adoption of the new ASUs, are as follows (in millions): Three months ended March 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Net Income $ 1,158 $ 8 $ — $ — $ 1,166 Adjustments to reconcile net income to net cash from operating activities: Deferred tax (benefit) expense 94 5 — — 99 Other assets 397 (14 ) — — 383 Accounts payable (675 ) 2 — — (673 ) Accrued wages and withholdings (35 ) 1 — — (34 ) Other liabilities (272 ) (2 ) — — (274 ) Cash flows from operating activities 239 — — — 239 Purchase of marketable securities (519 ) — — 10 (509 ) Net cash used in investing activities (920 ) — — 10 (910 ) Net decrease in cash, cash equivalents and restricted cash (789 ) — — 10 (779 ) Cash, cash equivalents and restricted cash at the beginning of period 3,476 — — 445 3,921 Cash, cash equivalents and restricted cash at the end of period $ 2,687 $ — $ — $ 455 $ 3,142 (a) Recast to reflect the adoption of Revenue from Contracts with Customers. (b) Recast to reflect the adoption of Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. (c) Recast to reflect the adoption of Restricted Cash. In February 2018, the FASB issued an ASU that allows a reclassification from accumulated other comprehensive income ("AOCI") to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Tax Act"). Effective January 1, 2018, we early-adopted this ASU and elected to reclassify the income tax effects of the Tax Act from AOCI to retained earnings. This resulted in a $735 million increase to retained earnings and a $735 million decrease to AOCI. Our current accounting policy for releasing income tax effects from other comprehensive income is based on a portfolio approach. Other accounting pronouncements adopted during the periods covered by the consolidated financial statements did not have a material impact on our consolidated financial position, results of operations or cash flows. Accounting Standards Issued But Not Yet Effective In August 2017, the FASB issued an ASU to enhance recognition of the economic results of hedging activities in the financial statements. In addition, this update makes certain targeted improvements to simplify the application of the hedge accounting guidance and increase transparency regarding the scope and results of hedging activities. The guidance will generally be applied prospectively and becomes effective for us in the first quarter of 2019, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption but do not expect this ASU to have a material impact on our consolidated financial position, results of operations or cash flows. In March 2017, the FASB issued an ASU to require the premium on callable debt securities to be amortized to the earliest call date. The amortization period for callable debt securities purchased at a discount would not be impacted by the proposed update. Under U.S. GAAP, premiums on callable debt securities are generally amortized over the contractual life of the security. Only in cases when an entity has a large number of similar securities is it allowed to consider estimates of principal prepayments. Amortization of the premium over the contractual life of the instrument can result in losses being recorded for the unamortized premium if the issuer exercises the call feature prior to maturity. The standard will be effective for us in the first quarter of 2019, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption but do not expect this ASU to have a material impact on our consolidated financial position, results of operations or cash flows. In January 2017, the FASB issued an ASU to simplify the accounting for goodwill impairment. The update removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The standard will be effective for us in the first quarter of 2020, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption but do not expect this ASU to have a material impact on our consolidated financial position, results of operations or cash flows. In February 2016, the FASB issued an ASU that requires lessees to recognize a right-of-use asset and lease liability on their balance sheet for all leases with terms beyond twelve months. Although the distinction between operating and finance leases will continue to exist under the new standard, the recognition and measurement of expenses and cash flows will not change significantly from the current treatment. This new guidance requires modified retrospective application and becomes effective for us in the first quarter of 2019, but early adoption is permitted. We are currently evaluating this update to determine the full impact of its adoption on our consolidated financial position, results of operations, cash flows and related disclosures, as well as the impact of adoption on policies, practices and systems. Based on the preliminary evaluation of our lease portfolio, we believe the largest impact will be accounting for leases for real estate, as we have a large portfolio of leased properties. As of December 31, 2017, we had $ 1.637 billion of future minimum operating lease commitments that are not currently recognized on our consolidated balance sheets. We expect material changes to our consolidated balance sheets as a result of the new standard. Other accounting pronouncements issued, but not effective until after March 31, 2018 , are not expected to have a material impact on our consolidated financial position, results of operations or cash flows.

RECENT ACCOUNTING PRONOUNCEME24

RECENT ACCOUNTING PRONOUNCEMENTS (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	Impacted consolidated balance sheet line items, which reflect the adoption of the new ASUs, are as follows (in millions): December 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Assets: Other current assets $ 1,133 $ 170 $ — $ — $ 1,303 Total current assets 15,548 170 — — 15,718 Deferred income tax assets 265 1 — — 266 Total Assets $ 45,403 $ 171 $ — $ — $ 45,574 Liabilities: Accounts payable $ 3,872 $ 62 $ — $ — $ 3,934 Accrued wages and withholdings 2,521 87 — — 2,608 Other current liabilities (1) 905 29 — — 934 Total current liabilities 12,708 178 — — 12,886 Deferred income tax liabilities 757 (1 ) — — 756 Shareowners' Equity: Retained earnings 5,858 (6 ) — — 5,852 Total Shareowners' Equity 1,030 (6 ) — — 1,024 Total Liabilities and Shareowners' Equity $ 45,403 $ 171 $ — $ — $ 45,574 (1) The caption "Other current liabilities" was presented separately from "Hedge margin liabilities" of $17 million in the Form 10-K at December 31, 2017. These captions have been collapsed in the consolidated balance sheets as of March 31, 2018 and December 31, 2017 included within this Form 10-Q. The unaudited consolidated statement of operations, which reflects the adoption of the new ASUs, is as follows (in millions): Three months ended March 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Revenue $ 15,315 $ 195 $ — $ — $ 15,510 Operating Expenses: Compensation and benefits 8,131 — 180 — 8,311 Repairs and maintenance 390 — — — 390 Depreciation and amortization 554 — — — 554 Purchased Transportation 2,366 179 — — 2,545 Fuel 621 — — — 621 Other occupancy 299 — — — 299 Other expenses 1,170 3 — — 1,173 Total Operating Expenses 13,531 182 180 — 13,893 Operating Profit 1,784 13 (180 ) — 1,617 Other Income and (Expense): Investment income and other 15 — 180 — 195 Interest expense (102 ) — — — (102 ) Total Other Income and (Expense) (87 ) — 180 — 93 Income Before Income Taxes 1,697 13 — — 1,710 Income Tax Expense 539 5 — — 544 Net Income $ 1,158 $ 8 $ — $ — $ 1,166 Basic earnings per share $ 1.32 $ 0.01 $ — $ — $ 1.33 Diluted earnings per share $ 1.32 $ 0.01 $ — $ — $ 1.33 (a) Recast to reflect the adoption of Revenue from Contracts with Customers. (b) Recast to reflect the adoption of Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. (c) Recast to reflect the adoption of Restricted Cash. The unaudited impacted consolidated statement of cash flows line items, which reflect the adoption of the new ASUs, are as follows (in millions): Three months ended March 31, 2017 As previously reported Adjustments (a) Adjustments (b) Adjustments (c) As Recast Net Income $ 1,158 $ 8 $ — $ — $ 1,166 Adjustments to reconcile net income to net cash from operating activities: Deferred tax (benefit) expense 94 5 — — 99 Other assets 397 (14 ) — — 383 Accounts payable (675 ) 2 — — (673 ) Accrued wages and withholdings (35 ) 1 — — (34 ) Other liabilities (272 ) (2 ) — — (274 ) Cash flows from operating activities 239 — — — 239 Purchase of marketable securities (519 ) — — 10 (509 ) Net cash used in investing activities (920 ) — — 10 (910 ) Net decrease in cash, cash equivalents and restricted cash (789 ) — — 10 (779 ) Cash, cash equivalents and restricted cash at the beginning of period 3,476 — — 445 3,921 Cash, cash equivalents and restricted cash at the end of period $ 2,687 $ — $ — $ 455 $ 3,142 (a) Recast to reflect the adoption of Revenue from Contracts with Customers. (b) Recast to reflect the adoption of Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. (c) Recast to reflect the adoption of Restricted Cash

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Disaggregation of Revenue Three months ended March 31, 2018 2017 Revenue: Next Day Air $ 1,784 $ 1,665 Deferred 1,069 970 Ground 7,374 6,901 U.S. Domestic Package $ 10,227 $ 9,536 Domestic $ 716 $ 613 Export 2,672 2,337 Cargo & Other 145 124 International Package $ 3,533 $ 3,074 Forwarding $ 1,605 $ 1,266 Logistics 782 740 Freight 777 707 Other 189 187 Supply Chain & Freight $ 3,353 $ 2,900 Consolidated revenue $ 17,113 $ 15,510

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Fair Value of Employee Stock Options Granted and Determined by Black-Scholes Valuation Model Assumptions	The weighted-average assumptions used and the calculated weighted-average fair values of the RTSR portion of the LTIP awards granted in 2017 are as follows: 2017 Risk-free interest rate 1.46 % Expected volatility 16.59 % Weighted-average fair value of units granted $ 119.29 Share payout 113.55 % The fair value of each option grant is estimated using the Black-Scholes option pricing model. The weighted-average assumptions used and the calculated weighted-average fair values of options granted in 2018 and 2017 are as follows: 2018 2017 Expected dividend yield 2.93 % 2.89 % Risk-free interest rate 2.84 % 2.15 % Expected life (in years) 7.5 7.5 Expected volatility 16.72 % 17.81 % Weighted-average fair value of options granted $ 15.23 $ 14.70

INVESTMENTS AND RESTRICTED CA27

INVESTMENTS AND RESTRICTED CASH (Tables)	3 Months Ended
	Mar. 31, 2018
Marketable Securities [Abstract]
Available-for-sale Securities	The following is a summary of marketable securities classified as trading and available-for-sale as of March 31, 2018 and December 31, 2017 (in millions): Cost Unrealized Gains Unrealized Losses Estimated Fair Value March 31, 2018: Current trading marketable securities: Corporate debt securities $ 75 $ — $ — $ 75 Equity Securities 2 — — 2 Total trading marketable securities $ 77 $ — $ — $ 77 Current available-for-sale securities: U.S. government and agency debt securities $ 312 $ — $ (4 ) $ 308 Mortgage and asset-backed debt securities 32 — (1 ) 31 Corporate debt securities 229 1 (2 ) 228 U.S. state and local municipal debt securities 10 — — 10 Non-U.S. government debt securities 11 — — 11 Total available-for-sale marketable securities $ 594 $ 1 $ (7 ) $ 588 Total current marketable securities $ 671 $ 1 $ (7 ) $ 665 Cost Unrealized Gains Unrealized Losses Estimated Fair Value December 31, 2017: Current trading marketable securities: Corporate debt securities $ 75 $ — $ — $ 75 Carbon credit investments (1) 77 16 — 93 Total trading marketable securities $ 152 $ 16 $ — $ 168 Current available-for-sale securities: U.S. government and agency debt securities $ 286 $ — $ (3 ) $ 283 Mortgage and asset-backed debt securities 86 — — 86 Corporate debt securities 201 1 (1 ) 201 Equity securities 2 — — 2 Non-U.S. government debt securities 9 — — 9 Total available-for-sale marketable securities $ 584 $ 1 $ (4 ) $ 581 Total current marketable securities $ 736 $ 17 $ (4 ) $ 749 (1) These investments are hedged with forward contracts that are not designated in hedging relationships. See Note 14 for offsetting statement of consolidated income impact.
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of marketable securities at March 31, 2018 , by contractual maturity, are shown below (in millions). Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties. Cost Estimated Fair Value Due in one year or less $ 129 $ 129 Due after one year through three years 434 429 Due after three years through five years 22 21 Due after five years 84 84 669 663 Equity and carbon credit investments 2 2 $ 671 $ 665
Cash and Cash Equivalents and Restricted Cash	A reconciliation of cash and cash equivalents and restricted cash from the consolidated balance sheets to the statements of consolidated cash flows is shown below (in millions). March 31, 2018 December 31, 2017 March 31, 2017 Cash and cash equivalents $ 3,544 $ 3,320 $ 2,687 Restricted cash 282 449 455 Total cash, cash equivalents and restricted cash $ 3,826 $ 3,769 $ 3,142
Fair Value, Assets Measured on Recurring Basis	The following table presents information about our investments measured at fair value on a recurring basis as of March 31, 2018 and December 31, 2017 , and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value (in millions): Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance March 31, 2018: Marketable Securities: U.S. government and agency debt securities $ 308 $ — $ — $ 308 Mortgage and asset-backed debt securities — 31 — 31 Corporate debt securities — 303 — 303 U.S. state and local municipal debt securities — 10 — 10 Equity securities — 2 — 2 Non-U.S. government debt securities — 11 — 11 Total marketable securities 308 357 — 665 Other non-current investments 19 — 3 22 Total $ 327 $ 357 $ 3 $ 687 December 31, 2017: Marketable Securities: U.S. government and agency debt securities $ 283 $ — $ — $ 283 Mortgage and asset-backed debt securities 86 — 86 Corporate debt securities — 276 — 276 Equity securities — 2 — 2 Non-U.S. government debt securities — 9 — 9 Carbon credit investments 93 — — 93 Total marketable securities 376 373 — 749 Other non-current investments 19 — 6 25 Total $ 395 $ 373 $ 6 $ 774
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents the changes in the above Level 3 instruments measured on a recurring basis for the three months ended March 31, 2018 and 2017 (in millions): Marketable Securities Other Non-Current Investments Total Balance on January 1, 2018 $ — $ 6 $ 6 Transfers into (out of) Level 3 — — — Net realized and unrealized gains (losses): Included in earnings (in investment income and other) — (3 ) (3 ) Included in accumulated other comprehensive income (pre-tax) — — — Purchases — — — Sales — — — Balance on March 31, 2018 $ — $ 3 $ 3 Marketable Securities Other Non-Current Investments Total Balance on January 1, 2017 $ — $ 13 $ 13 Transfers into (out of) Level 3 — — — Net realized and unrealized gains (losses): Included in earnings (in investment income and other) — (2 ) (2 ) Included in accumulated other comprehensive income (pre-tax) — — — Purchases — — — Sales — — — Balance on March 31, 2017 $ — $ 11 $ 11 There were no transfers of investments between Level 1 and Level 2 during the three months ended March 31, 2018 and 2017 . Marketable Securities Other Investments

PROPERTY, PLANT AND EQUIPMENT (

PROPERTY, PLANT AND EQUIPMENT (Tables)	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment as of March 31, 2018 and December 31, 2017 consist of the following (in millions): 2018 2017 Vehicles $ 9,422 $ 9,365 Aircraft 16,444 16,248 Land 1,782 1,582 Buildings 4,150 4,035 Building and leasehold improvements 4,049 3,934 Plant equipment 9,833 9,387 Technology equipment 1,956 1,907 Equipment under operating leases — 29 Construction-in-progress 2,673 2,239 50,309 48,726 Less: Accumulated depreciation and amortization (27,070 ) (26,608 ) $ 23,239 $ 22,118

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	Information about net periodic benefit cost for our company-sponsored pension and postretirement benefit plans is as follows for the three months ended March 31, 2018 and 2017 (in millions): U.S. Pension Benefits U.S. Postretirement Medical Benefits International Pension Benefits 2018 2017 2018 2017 2018 2017 Three Months Ended March 31: Service cost $ 416 $ 390 $ 7 $ 7 $ 16 $ 15 Interest cost 449 462 26 28 12 10 Expected return on assets (801 ) (712 ) (2 ) (2 ) (20 ) (16 ) Amortization of prior service cost 49 48 2 2 — — Net periodic benefit cost $ 113 $ 188 $ 33 $ 35 $ 8 $ 9

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table indicates the allocation of goodwill by reportable segment as of March 31, 2018 and December 31, 2017 (in millions): U.S. Domestic Package International Package Supply Chain & Freight Consolidated December 31, 2017: $ 715 $ 435 $ 2,722 $ 3,872 Acquired — — — — Currency / Other — 3 18 21 March 31, 2018: $ 715 $ 438 $ 2,740 $ 3,893
Schedule of Intangible Assets (Excluding Goodwill)	The following is a summary of intangible assets as of March 31, 2018 and December 31, 2017 (in millions): Gross Carrying Amount Accumulated Amortization Net Carrying Value March 31, 2018: Capitalized software $ 3,402 $ (2,357 ) $ 1,045 Licenses 114 (17 ) 97 Franchise rights 146 (99 ) 47 Customer relationships 777 (174 ) 603 Trade name 200 — 200 Trademarks, patents and other 68 (35 ) 33 Total Intangible Assets, Net $ 4,707 $ (2,682 ) $ 2,025 December 31, 2017: Capitalized software $ 3,273 $ (2,310 ) $ 963 Licenses 114 (10 ) 104 Franchise rights 144 (97 ) 47 Customer relationships 776 (160 ) 616 Trade name 200 — 200 Trademarks, patents and other 71 (37 ) 34 Total Intangible Assets, Net $ 4,578 $ (2,614 ) $ 1,964

DEBT AND FINANCING ARRANGEMEN31

DEBT AND FINANCING ARRANGEMENTS (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The carrying value of our outstanding debt as of March 31, 2018 and December 31, 2017 consists of the following (in millions): Principal Amount Carrying Value Maturity 2018 2017 Commercial paper $ 2,622 2018 $ 2,622 $ 3,203 Fixed-rate senior notes: 5.500% senior notes 750 2018 — 751 5.125% senior notes 1,000 2019 1,010 1,019 3.125% senior notes 1,500 2021 1,526 1,549 2.050% senior notes 700 2021 697 696 2.450% senior notes 1,000 2022 961 979 2.350% senior notes 600 2022 597 597 2.500% senior note 1,000 2023 993 992 2.800% senior note 500 2024 496 495 2.400% senior note 500 2026 497 497 3.050% senior note 1,000 2027 991 990 6.200% senior notes 1,500 2038 1,482 1,482 4.875% senior notes 500 2040 490 489 3.625% senior notes 375 2042 368 368 3.400% senior notes 500 2046 491 491 3.750 % senior notes 1,150 2047 1,136 1,135 Floating-rate senior notes: Floating-rate senior notes 350 2021 349 348 Floating-rate senior notes 400 2022 398 398 Floating-rate senior notes 500 2023 498 496 Floating-rate senior notes 1,043 2049-2067 1,031 1,032 8.375% Debentures: 8.375% debentures 424 2020 441 447 8.375% debentures 276 2030 282 282 Pound Sterling notes: 5.500% notes 93 2031 88 84 5.125% notes 640 2050 610 586 Euro senior notes: 0.375% notes 862 2023 856 832 1.625% notes 862 2025 856 833 1.000% notes 616 2028 612 595 1.500% notes 616 2032 611 594 Floating-rate senior notes 616 2020 614 598 Canadian senior notes: 2.125% notes 580 2024 577 593 Capital lease obligations 580 2018-3005 580 500 Facility notes and bonds 320 2029-2045 319 319 Other debt 13 2018-2022 13 19 Total debt $ 23,988 23,092 24,289 Less: Current maturities (2,683 ) (4,011 ) Long-term debt $ 20,409 $ 20,278

SHAREOWNERS' EQUITY (Tables)

SHAREOWNERS' EQUITY (Tables)	3 Months Ended
	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
Schedule of Stockholders Equity	The following is a rollforward of our common stock, additional paid-in capital and retained earnings accounts for the three months ended March 31, 2018 and 2017 (in millions, except per share amounts): 2018 2017 Shares Dollars Shares Dollars Class A Common Stock Balance at beginning of period 173 $ 2 180 $ 2 Common stock purchases (1 ) — (1 ) — Stock award plans 3 — 3 — Common stock issuances 2 — 1 — Conversions of class A to class B common stock (3 ) — (3 ) — Class A shares issued at end of period 174 $ 2 180 $ 2 Class B Common Stock Balance at beginning of period 687 $ 7 689 $ 7 Common stock purchases (1 ) — (3 ) — Conversions of class A to class B common stock 3 — 3 — Class B shares issued at end of period 689 $ 7 689 $ 7 Additional Paid-In Capital Balance at beginning of period $ — $ — Stock award plans 20 15 Common stock purchases (136 ) (174 ) Common stock issuances 155 132 Option premiums received (paid) (39 ) 27 Balance at end of period $ — $ — Retained Earnings Balance at beginning of period $ 5,852 $ 4,880 Net income attributable to common shareowners 1,345 1,166 Dividends ($0.91 and $0.83 per share) (840 ) (774 ) Common stock purchases (119 ) (275 ) Reclassification from AOCI pursuant to the early adoption of ASU 2018-02 735 — Balance at end of period $ 6,973 $ 4,997
Schedule of Accumulated Other Comprehensive Income (Loss)	The activity in AOCI for the three months ended March 31, 2018 and 2017 is as follows (in millions): 2018 2017 Foreign currency translation gain (loss), net of tax: Balance at beginning of period $ (930 ) $ (1,016 ) Translation adjustment (net of tax effect of $(9) and $(14)) (6 ) 30 Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02 (47 ) — Balance at end of period (983 ) (986 ) Unrealized gain (loss) on marketable securities, net of tax: Balance at beginning of period (2 ) (1 ) Current period changes in fair value (net of tax effect of $(1) and $0) (4 ) — Reclassification to earnings (net of tax effect of $1 and $0) 1 — Balance at end of period (5 ) (1 ) Unrealized gain (loss) on cash flow hedges, net of tax: Balance at beginning of period (366 ) (45 ) Current period changes in fair value (net of tax effect of $(33) and $(17)) (102 ) (30 ) Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02 (79 ) — Reclassification to earnings (net of tax effect of $12 and $(7)) 36 (11 ) Balance at end of period (511 ) (86 ) Unrecognized pension and postretirement benefit costs, net of tax: Balance at beginning of period (3,569 ) (3,421 ) Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02 (609 ) — Reclassification to earnings (net of tax effect of $12 and $18) 39 32 Balance at end of period (4,139 ) (3,389 ) Accumulated other comprehensive income (loss) at end of period $ (5,638 ) $ (4,462 )
Schedule of Reclassifications from Accumulated Other Comprehensive Income (Loss) to Earnings	Detail of the gains (losses) reclassified from AOCI to the statements of consolidated income for the three months ended March 31, 2018 and 2017 is as follows (in millions): Three Months Ended March 31: Amount Reclassified from AOCI Affected Line Item in the Income Statement 2018 2017 Unrealized gain (loss) on marketable securities: Realized loss on sale of securities $ (2 ) $ — Investment income Income tax expense 1 — Income tax expense Impact on net income (1 ) — Net income Unrealized gain (loss) on cash flow hedges: Interest rate contracts (6 ) (7 ) Interest expense Foreign exchange contracts (42 ) 25 Revenue Income tax (expense) benefit 12 (7 ) Income tax expense Impact on net income (36 ) 11 Net income Unrecognized pension and postretirement benefit costs: Prior service costs (51 ) (50 ) Compensation and benefits Income tax benefit 12 18 Income tax expense Impact on net income (39 ) (32 ) Net income Total amount reclassified for the period $ (76 ) $ (21 ) Net income
Schedule of Deferred Compensation and Treasury Stock Activity	Activity in the deferred compensation program for the three months ended March 31, 2018 and 2017 is as follows (in millions): 2018 2017 Shares Dollars Shares Dollars Deferred Compensation Obligations: Balance at beginning of period $ 37 $ 45 Reinvested dividends 1 1 Benefit payments (7 ) (10 ) Balance at end of period $ 31 $ 36 Treasury Stock: Balance at beginning of period (1 ) $ (37 ) (1 ) $ (45 ) Reinvested dividends — (1 ) — (1 ) Benefit payments — 7 — 10 Balance at end of period (1 ) $ (31 ) (1 ) $ (36 )

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Information	Segment information for the three months ended March 31, 2018 and 2017 is as follows (in millions): Three Months Ended 2018 2017 Revenue: U.S. Domestic Package $ 10,227 $ 9,536 International Package 3,533 3,074 Supply Chain & Freight 3,353 2,900 Consolidated $ 17,113 $ 15,510 Operating Profit: U.S. Domestic Package $ 756 $ 950 International Package 594 518 Supply Chain & Freight 170 149 Consolidated $ 1,520 $ 1,617

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2018 and 2017 (in millions, except per share amounts): Three Months Ended 2018 2017 Numerator: Net income attributable to common shareowners $ 1,345 $ 1,166 Denominator: Weighted average shares 861 869 Deferred compensation obligations 1 1 Vested portion of restricted units 4 4 Denominator for basic earnings per share 866 874 Effect of dilutive securities: Restricted units 4 4 Stock options — 1 Denominator for diluted earnings per share 870 879 Basic earnings per share $ 1.55 $ 1.33 Diluted earnings per share $ 1.55 $ 1.33

DERIVATIVE INSTRUMENTS AND RI35

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	As of March 31, 2018 and December 31, 2017 , the notional amounts of our outstanding derivative positions were as follows (in millions): March 31, 2018 December 31, 2017 Currency hedges: Euro EUR 4,652 EUR 4,942 British Pound Sterling GBP 1,785 GBP 1,736 Canadian Dollar CAD 1,393 CAD 1,259 Mexican Peso MXN — MXN 169 Singapore Dollar SGD 21 SGD 11 Interest rate hedges: Fixed to Floating Interest Rate Swaps $ 4,674 $ 5,424 Floating to Fixed Interest Rate Swaps $ 778 $ 778 Investment market price hedges: Marketable Securities EUR — EUR 64
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	Fair Value Hierarchy Level Gross Amounts Presented in Consolidated Balance Sheets Net Amounts if Right of Offset had been Applied Asset Derivatives Balance Sheet Location March 31, December 31, March 31, December 31, Derivatives designated as hedges: Foreign exchange contracts Other current assets Level 2 $ 4 $ 2 $ — $ — Interest rate contracts Other current assets Level 2 — 1 — 1 Foreign exchange contracts Other non-current assets Level 2 9 1 — — Interest rate contracts Other non-current assets Level 2 31 59 10 43 Derivatives not designated as hedges: Foreign exchange contracts Other current assets Level 2 14 18 16 17 Foreign exchange contracts Other non-current assets Level 2 8 — 8 — Interest rate contracts Other non-current assets Level 2 24 26 24 26 Total Asset Derivatives $ 90 $ 107 $ 58 $ 87 Fair Value Hierarchy Level Gross Amounts Presented in Consolidated Balance Sheets Net Amounts if Right of Offset had been Applied Liability Derivatives Balance Sheet Location March 31, December 31, March 31, December 31, Derivatives designated as hedges: Foreign exchange contracts Other current liabilities Level 2 $ 144 $ 93 $ 140 $ 91 Interest rate contracts Other current liabilities Level 2 — — — — Foreign exchange contracts Other non-current liabilities Level 2 249 194 240 193 Interest rate contracts Other non-current liabilities Level 2 51 28 30 12 Derivatives not designated as hedges: Foreign exchange contracts Other current liabilities Level 2 15 1 17 — Investment market price contracts Other current liabilities Level 2 — 16 — 16 Foreign exchange contracts Other non-current liabilities Level 2 7 — 7 — Interest rate contracts Other non-current liabilities Level 2 — — — — Total Liability Derivatives $ 466 $ 332 $ 434 $ 312
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)	The following table indicates the amount of gains and losses that have been recognized in AOCI for the three months ended March 31, 2018 and 2017 for those derivatives designated as cash flow hedges (in millions): Three Months Ended March 31: Derivative Instruments in Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) 2018 2017 Interest rate contracts $ 1 $ — Foreign exchange contracts (136 ) (47 ) Total $ (135 ) $ (47 ) The following table indicates the amount of gains and losses that have been recognized in AOCI within foreign currency translation adjustment for the three months ended March 31, 2018 and 2017 for those instruments designated as net investment hedges (in millions): Three Months Ended March 31: Non-derivative Instruments in Net Investment Hedging Relationships Amount of Gain (Loss) Recognized in AOCI on Debt (Effective Portion) 2018 2017 Foreign denominated debt $ (80 ) $ (37 ) Total $ (80 ) $ (37 )
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The following is a summary of the amounts recorded in the statements of consolidated income related to fair value changes and settlements of these interest rate swaps, foreign currency forward and investment market price forward contracts not designated as hedges for the three months ended March 31, 2018 and 2017 (in millions): Derivative Instruments Not Designated in Hedging Relationships Location of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income 2018 2017 Three Months Ended March 31: Interest rate contracts Interest expense $ (2 ) $ (2 ) Foreign exchange contracts Investment income and other 8 6 Investment market price contracts Investment income and other 16 26 Total $ 22 $ 30 The following table indicates the amount and location in the statements of consolidated income in which derivative gains and losses, as well as the associated gains and losses on the underlying exposure, have been recognized for those derivatives designated as fair value hedges for the three months ended March 31, 2018 and 2017 (in millions): Derivative Instruments in Fair Value Hedging Relationships Location of Gain (Loss) Recognized in Income Derivative Amount of Gain (Loss) Recognized in Income Hedged Items in Fair Value Hedging Relationships Location of Gain (Loss) Recognized In Income Hedged Items Amount of Gain (Loss) Recognized in Income 2018 2017 2018 2017 Interest rate contracts Interest Expense $ (54 ) $ (24 ) Fixed-Rate Debt Interest Expense $ 54 $ 24

RECENT ACCOUNTING PRONOUNCEME36

RECENT ACCOUNTING PRONOUNCEMENTS - Narratives (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Hedge margin liabilities	$ 0		$ 17
Income Tax Expense (Benefit)
Income tax benefit	(316)	$ (544)
Retained earnings	6,973		5,852
Accumulated other comprehensive loss	(5,638)	(4,462)	(4,867)
Non-Current Investments and Restricted Cash	311		483
Operating Leases, Future Minimum Payments Due			1,637
Revenues	17,113	15,510
Operating expenses	$ 15,593	$ 13,893
Restatement
Income Tax Expense (Benefit)
Retained earnings			735
Accumulated other comprehensive loss			$ 735

RECENT ACCOUNTING PRONOUNCEME37

RECENT ACCOUNTING PRONOUNCEMENTS - Balance Sheet Impact (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Assets
Other current assets	$ 1,517	$ 1,303
Total Current Assets	13,620	15,718
Deferred income tax assets	264	266
Total Assets	44,464	45,574
Liabilities:
Accounts payable	3,501	3,934
Accrued wages and withholdings	2,523	2,608
Other current liabilities		934
Total Current Liabilities	11,149	12,886
Deferred income tax liabilities	837	756
Shareowners' Equity:
Retained earnings	6,973	5,852
Total Shareowners’ Equity	1,375	1,024
Total Liabilities and Shareowners’ Equity	$ 44,464	45,574
Previously Reported
Assets
Other current assets		1,133
Total Current Assets		15,548
Deferred income tax assets		265
Total Assets		45,403
Liabilities:
Accounts payable		3,872
Accrued wages and withholdings		2,521
Other current liabilities		905
Total Current Liabilities		12,708
Deferred income tax liabilities		757
Shareowners' Equity:
Retained earnings		5,858
Total Shareowners’ Equity		1,030
Total Liabilities and Shareowners’ Equity		45,403
Restatement
Shareowners' Equity:
Retained earnings		735
ASU 2014-09 | Restatement
Assets
Other current assets		170
Total Current Assets		170
Deferred income tax assets		1
Total Assets		171
Liabilities:
Accounts payable		62
Accrued wages and withholdings		87
Other current liabilities		29
Total Current Liabilities		178
Deferred income tax liabilities		(1)
Shareowners' Equity:
Retained earnings		(6)
Total Shareowners’ Equity		(6)
Total Liabilities and Shareowners’ Equity		$ 171

RECENT ACCOUNTING PRONOUNCEME38

RECENT ACCOUNTING PRONOUNCEMENTS - Income Statement Impact (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 17,113	$ 15,510
Operating Expenses:
Compensation and benefits	9,045	8,311
Repairs and maintenance	434	390
Depreciation and amortization	596	554
Purchased transportation	3,145	2,545
Fuel	750	621
Other occupancy	361	299
Other expenses	1,262	1,173
Operating expenses	15,593	13,893
Operating Profit	1,520	1,617
Other Income and (Expense):
Investment income and other	294	195
Interest expense	(153)	(102)
Total Other Income and (Expense)	141	93
Income Before Income Taxes	1,661	1,710
Income Tax Expense	316	544
Net Income	$ 1,345	$ 1,166
Basic Earnings Per Share	$ 1.55	$ 1.33
Diluted Earnings Per Share	$ 1.55	$ 1.33
Previously Reported
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue		$ 15,315
Operating Expenses:
Compensation and benefits		8,131
Repairs and maintenance		390
Depreciation and amortization		554
Purchased transportation		2,366
Fuel		621
Other occupancy		299
Other expenses		1,170
Operating expenses		13,531
Operating Profit		1,784
Other Income and (Expense):
Investment income and other		15
Interest expense		(102)
Total Other Income and (Expense)		(87)
Income Before Income Taxes		1,697
Income Tax Expense		539
Net Income		$ 1,158
Basic Earnings Per Share		$ 1.32
Diluted Earnings Per Share		$ 1.32
Restatement | ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue		$ 195
Operating Expenses:
Compensation and benefits		0
Repairs and maintenance		0
Depreciation and amortization		0
Purchased transportation		179
Fuel		0
Other occupancy		0
Other expenses		3
Operating expenses		182
Operating Profit		13
Other Income and (Expense):
Investment income and other		0
Interest expense		0
Total Other Income and (Expense)		0
Income Before Income Taxes		13
Income Tax Expense		5
Net Income		$ 8
Basic Earnings Per Share		$ 0.01
Diluted Earnings Per Share		$ 0.01
Restatement | ASU 2017-07
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue		$ 0
Operating Expenses:
Compensation and benefits		180
Repairs and maintenance		0
Depreciation and amortization		0
Purchased transportation		0
Fuel		0
Other occupancy		0
Other expenses		0
Operating expenses		180
Operating Profit		(180)
Other Income and (Expense):
Investment income and other		180
Interest expense		0
Total Other Income and (Expense)		180
Income Before Income Taxes		0
Income Tax Expense		0
Net Income		$ 0
Basic Earnings Per Share		$ 0
Diluted Earnings Per Share		$ 0

RECENT ACCOUNTING PRONOUNCEME39

RECENT ACCOUNTING PRONOUNCEMENTS - Cash Flow Impact (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Income	$ 1,345	$ 1,166
Deferred tax (benefit) expense	106	99
Other assets	1,100	383
Accounts payable	(601)	(673)
Accrued wages and withholdings	(67)	(34)
Other liabilities	(24)	(274)
Net cash from operating activities	4,067	239
Purchases of marketable securities	(177)	(509)
Net cash used in investing activities	(1,446)	(910)
Net decrease in cash, cash equivalents and restricted cash	57	(779)
Beginning of period	3,769	3,921
End of period	$ 3,826	3,142
Previously Reported
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Income		1,158
Deferred tax (benefit) expense		94
Other assets		397
Accounts payable		(675)
Accrued wages and withholdings		(35)
Other liabilities		(272)
Net cash from operating activities		239
Purchases of marketable securities		(519)
Net cash used in investing activities		(920)
Net decrease in cash, cash equivalents and restricted cash		(789)
Beginning of period		3,476
End of period		2,687
ASU 2014-09 | Restatement
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Income		8
Deferred tax (benefit) expense		5
Other assets		(14)
Accounts payable		2
Accrued wages and withholdings		1
Other liabilities		(2)
Net cash from operating activities		0
Net cash used in investing activities		0
Net decrease in cash, cash equivalents and restricted cash		0
Beginning of period		0
End of period		0
ASU 2016-18 | Restatement
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Income		0
Net cash from operating activities		0
Purchases of marketable securities		10
Net cash used in investing activities		10
Net decrease in cash, cash equivalents and restricted cash		10
Beginning of period		445
End of period		$ 455

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue
Revenues	$ 17,113	$ 15,510
Logistics
Disaggregation of Revenue
Revenues	782	740
Freight
Disaggregation of Revenue
Revenues	777	707
Other
Disaggregation of Revenue
Revenues	189	187
U.S | Next Day Air
Disaggregation of Revenue
Revenues	1,784	1,665
U.S | Deferred
Disaggregation of Revenue
Revenues	1,069	970
U.S | Ground
Disaggregation of Revenue
Revenues	7,374	6,901
International | Domestic
Disaggregation of Revenue
Revenues	716	613
International | Export
Disaggregation of Revenue
Revenues	2,672	2,337
International | Cargo & Other
Disaggregation of Revenue
Revenues	$ 145	$ 124

Revenue Recognition - Narrative

Revenue Recognition - Narratives (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Revenue from Contract with Customer [Abstract]
Allowance for doubtful receivables	$ 12		$ 39
Contract assets	175	$ 170
Deferred revenue	224	174
Contract liability	$ 35	$ 31

STOCK-BASED COMPENSATION - Addi

STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Mar. 22, 2018	Mar. 01, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 26, 2018	Feb. 07, 2018	Mar. 24, 2017
Stockholders Equity Note [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Cycle Period			3 years
Stock compensation expense			$ 239	$ 212
Management Incentive Award [Member]
Stockholders Equity Note [Line Items]
Percentage of the award vesting at each anniversary date of the grant			20.00%
Closing New York Stock Exchange price		$ 106.43			$ 103.70	$ 111.91
Award vesting period			5 years
Long-Term Incentive Performance Award
Stockholders Equity Note [Line Items]
Closing New York Stock Exchange price							$ 105.05
Weighted-average fair value of options granted (usd per share)				$ 119.29
Nonqualified Stock Options [Member]
Stockholders Equity Note [Line Items]
Percentage of the award vesting at each anniversary date of the grant			20.00%
Expiration period (in years)			10 years
Award vesting period			5 years
Stock options granted	0	300,000		300,000
Weighted-average fair value of options granted (usd per share)	$ 104.45	$ 106.43		$ 106.87

STOCK-BASED COMPENSATION - Fair

STOCK-BASED COMPENSATION - Fair Value of Employee Stock Options Granted as Determined by Black-Scholes Valuation Model Assumptions (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Nonqualified Stock Options [Member]
Stockholders Equity Note [Line Items]
Risk-free interest rate	2.84%	2.15%
Expected volatility	16.72%	17.81%
Weighted-average fair value of options granted (usd per share)	$ 15.23	$ 14.70
Expected dividend yield	2.93%	2.89%
Expected life (in years)	7 years 6 months	7 years 6 months
Long-Term Incentive Performance Award
Stockholders Equity Note [Line Items]
Risk-free interest rate		1.46%
Expected volatility		16.59%
Weighted-average fair value of options granted (usd per share)		$ 119.29
Expected dividend yield		113.55%

Summary of Marketable Securitie

Summary of Marketable Securities (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Schedule of Marketable Securities [Line Items]
Trading Securities, Short-term Investments, Amortized Cost	$ 77	$ 152
Trading Securities, Gross Unrealized Gain	0	16
Trading Securities, Gross Unrealized Loss	0	0
Trading Securities	77	168
Available-for-sale Securities, Amortized Cost Basis	594	584
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1	1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	(7)	(4)
Available-for-sale Securities, Current	588	581
Total Amortized Cost	671	736
Marketable Securities, Gross Unrealized Gain	1	17
Marketable Securities, Gross Unrealized Loss	(7)	(4)
Total Estimated Fair Value	665	749
Corporate debt securities
Schedule of Marketable Securities [Line Items]
Trading Securities, Short-term Investments, Amortized Cost	75	75
Trading Securities, Gross Unrealized Gain	0	0
Trading Securities, Gross Unrealized Loss	0	0
Trading Securities	75	75
Available-for-sale Securities, Amortized Cost Basis	229	201
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1	1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	(2)	(1)
Available-for-sale Securities, Current	228	201
Carbon credit investments
Schedule of Marketable Securities [Line Items]
Trading Securities, Short-term Investments, Amortized Cost		77
Trading Securities, Gross Unrealized Gain		16
Trading Securities, Gross Unrealized Loss		0
Trading Securities		93
U.S. government and agency debt securities
Schedule of Marketable Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	312	286
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	(4)	(3)
Available-for-sale Securities, Current	308	283
Mortgage and asset-backed debt securities
Schedule of Marketable Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	32	86
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	(1)	0
Available-for-sale Securities, Current	31	86
U.S. state and local municipal debt securities
Schedule of Marketable Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	10
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0
Available-for-sale Securities, Current	10
Equity securities
Schedule of Marketable Securities [Line Items]
Trading Securities, Short-term Investments, Amortized Cost	2
Trading Securities, Gross Unrealized Gain	0
Trading Securities, Gross Unrealized Loss	0
Trading Securities	2
Available-for-sale Securities, Amortized Cost Basis		2
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax		0
Available-for-sale Securities, Current		2
Non-U.S. government debt securities
Schedule of Marketable Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	11	9
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities, Current	$ 11	$ 9

Amortized Cost and Estimated Fa

Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Cost
Due in one year or less	$ 129
Due after one year through three years	434
Due after three years through five years	22
Due after five years	84
Marketable Securities, Debt Maturities, Amortized Cost, Total	669
Equity securities	2
Total Amortized Cost	671	$ 736
Estimated Fair Value
Due in one year or less	129
Due after one year through three years	429
Due after three years through five years	21
Due after five years	84
Marketable Securities, Debt Maturities, Fair Value, Total	663
Equity securities	2
Total Estimated Fair Value	$ 665	$ 749

INVESTMENTS AND RESTRICTED CA46

INVESTMENTS AND RESTRICTED CASH - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Gain (Loss) on Investments [Line Items]
Non-Current Investments and Restricted Cash	$ 311,000,000		$ 483,000,000
Fair Value Inputs, Discount Rate	7.92%	7.56%
Transfer between level 1 and level 2	$ 0	$ 0
cash held in escrow [Member]
Gain (Loss) on Investments [Line Items]
Restricted Cash and Cash Equivalents, Noncurrent	10,000,000		15,000,000
Self-insurance requirements [Member]
Gain (Loss) on Investments [Line Items]
Non-Current Investments and Restricted Cash	282,000,000		449,000,000
Variable life insurance policy
Gain (Loss) on Investments [Line Items]
Non-Current Investments and Restricted Cash	$ 19,000,000		$ 19,000,000

Investments Measured at Fair Va

Investments Measured at Fair Value on a Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 687	$ 774
Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	665	749
Marketable securities | U.S. government and agency debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	308	283
Marketable securities | Mortgage and asset-backed debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	31	86
Marketable securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	303	276
Marketable securities | U.S. state and local municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10
Marketable securities | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2	2
Marketable securities | Non-U.S. government debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	11	9
Marketable securities | Carbon credit investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		93
Other Non-Current Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	22	25
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	327	395
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	308	376
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | U.S. government and agency debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	308	283
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Mortgage and asset-backed debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | U.S. state and local municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Non-U.S. government debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable securities | Carbon credit investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		93
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Non-Current Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	19	19
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	357	373
Significant Other Observable Inputs (Level 2) | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	357	373
Significant Other Observable Inputs (Level 2) | Marketable securities | U.S. government and agency debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Other Observable Inputs (Level 2) | Marketable securities | Mortgage and asset-backed debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	31	86
Significant Other Observable Inputs (Level 2) | Marketable securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	303	276
Significant Other Observable Inputs (Level 2) | Marketable securities | U.S. state and local municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10
Significant Other Observable Inputs (Level 2) | Marketable securities | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	2	2
Significant Other Observable Inputs (Level 2) | Marketable securities | Non-U.S. government debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	11	9
Significant Other Observable Inputs (Level 2) | Marketable securities | Carbon credit investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		0
Significant Other Observable Inputs (Level 2) | Other Non-Current Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	3	6
Significant Unobservable Inputs (Level 3) | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities | U.S. government and agency debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities | Mortgage and asset-backed debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities | U.S. state and local municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0
Significant Unobservable Inputs (Level 3) | Marketable securities | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities | Non-U.S. government debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Significant Unobservable Inputs (Level 3) | Marketable securities | Carbon credit investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments		0
Significant Unobservable Inputs (Level 3) | Other Non-Current Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 3	$ 6

Changes in Level 3 Instruments

Changes in Level 3 Instruments Measured on a Recurring Basis (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 6	$ 13
Transfers into (out of) Level 3	0	0
Net realized and unrealized gains (losses):
Included in earnings (in investment income and other)	(3)	(2)
Included in accumulated other comprehensive income (pre-tax)	0	0
Purchases	0	0
Sales	0	0
Ending Balance	3	11
Marketable Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	0	0
Transfers into (out of) Level 3	0	0
Net realized and unrealized gains (losses):
Included in earnings (in investment income and other)	0	0
Included in accumulated other comprehensive income (pre-tax)	0	0
Purchases	0	0
Sales	0	0
Ending Balance	0	0
Other Non-Current Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	6	13
Transfers into (out of) Level 3	0	0
Net realized and unrealized gains (losses):
Included in earnings (in investment income and other)	(3)	(2)
Included in accumulated other comprehensive income (pre-tax)	0	0
Purchases	0	0
Sales	0	0
Ending Balance	$ 3	$ 11

INVESTMENTS AND RESTRICTED CA49

INVESTMENTS AND RESTRICTED CASH - Cash Details (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Cash and cash equivalents	$ 3,544	$ 3,320	$ 2,687
Restricted cash	282	449	455
Total cash, cash equivalents and restricted cash	$ 3,826	$ 3,769	$ 3,142	$ 3,921

Property Plant and Equipment (D

Property Plant and Equipment (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 50,309	$ 48,726
Less: Accumulated depreciation and amortization	(27,070)	(26,608)
Property, plant and equipment, net	23,239	22,118
Vehicles
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	9,422	9,365
Aircraft
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	16,444	16,248
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,782	1,582
Buildings
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,150	4,035
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,049	3,934
Plant equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	9,833	9,387
Technology equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,956	1,907
Equipment under operating leases
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	0	29
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,673	$ 2,239

Property Plant and Equipment -

Property Plant and Equipment - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Impairment charges on property plant and equipment	$ 0	$ 0

Net Periodic Benefit Cost for P

Net Periodic Benefit Cost for Pension and Postretirement Benefit Plans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Pension Plan | U.S. Pension Benefits
Net Periodic Cost:
Service cost	$ 416	$ 390
Interest cost	449	462
Expected return on assets	(801)	(712)
Amortization of:
Amortization of prior service cost	49	48
Net periodic benefit cost	113	188
Defined Benefit Pension Plan | International Pension Benefits
Net Periodic Cost:
Service cost	16	15
Interest cost	12	10
Expected return on assets	(20)	(16)
Amortization of:
Amortization of prior service cost	0	0
Net periodic benefit cost	8	9
U.S. Postretirement Medical Benefits
Net Periodic Cost:
Service cost	7	7
Interest cost	26	28
Expected return on assets	(2)	(2)
Amortization of:
Amortization of prior service cost	2	2
Net periodic benefit cost	$ 33	$ 35

EMPLOYEE BENEFIT PLANS - Additi

EMPLOYEE BENEFIT PLANS - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)Employees	Dec. 31, 2007USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, net actuarial gain	$ 569
Defined benefit plan, curtailments	1,525
Defined benefit plan, net actuarial loss	$ 956
Defined benefit plan, assumptions used calculating benefit obligation, discount rate		3.20%
Defined benefit plan,actual return on plan assets		2.75%
Actuarial gain loss corridor threshold	10.00%
Multiemployer Plans, Payment Term	45 years
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamsters | Employees		280,000
Number of pilots under a collective bargaining agreement with the Independent Pilots Association | Employees		2,700
Majority of ground mechanics not employed under agreements | Employees		3,100
Central States Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Withdrawal liability			$ 6,100
Pension liability	$ 4,000
Multiemployer Plans, Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Multi-employer Plans, Withdrawal Obligation, Fair Value Disclosure	868	$ 921
Other noncurrent liabilities | Multiemployer Plans, Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plans, Withdrawal Obligation, Present Value	857	859
Other current liabilities | Multiemployer Plans, Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plans, Withdrawal Obligation, Present Value	$ 8	$ 8
Minimum [Member] | Non-union employees
Defined Benefit Plan Disclosure [Line Items]
Employer contribution percentage	5.00%
Maximum [Member] | Non-union employees
Defined Benefit Plan Disclosure [Line Items]
Employer contribution percentage	8.00%
Defined Benefit Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions to defined benefit plan, current fiscal year	74
Defined Benefit Pension Plan | U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Amount contributed to company- sponsored benefit plans	$ 24
U.S. Postretirement Medical Benefits
Defined Benefit Plan Disclosure [Line Items]
Amount contributed to company- sponsored benefit plans	$ 20
Estimated future employer contributions to defined benefit plan, current fiscal year	59

Allocation of Goodwill by Repor

Allocation of Goodwill by Reportable Segment (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 3,872
Acquired	0
Currency / Other	21
Ending balance	3,893
U.S. Domestic Package
Goodwill [Roll Forward]
Beginning balance	715
Acquired	0
Currency / Other	0
Ending balance	715
International Package
Goodwill [Roll Forward]
Beginning balance	435
Acquired	0
Currency / Other	3
Ending balance	438
Supply Chain & Freight
Goodwill [Roll Forward]
Beginning balance	2,722
Acquired	0
Currency / Other	18
Ending balance	$ 2,740

Summary of Intangible Assets (D

Summary of Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,707	$ 4,578
Accumulated Amortization	(2,682)	(2,614)
Net Carrying Value	2,025	1,964
Licenses
Finite-Lived Intangible Assets [Line Items]
Carrying value	5
Trade name
Finite-Lived Intangible Assets [Line Items]
Carrying value	200
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,402	3,273
Accumulated Amortization	(2,357)	(2,310)
Net Carrying Value	1,045	963
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	114	114
Accumulated Amortization	(17)	(10)
Net Carrying Value	97	104
Franchise rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	146	144
Accumulated Amortization	(99)	(97)
Net Carrying Value	47	47
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	777	776
Accumulated Amortization	(174)	(160)
Net Carrying Value	603	616
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	200	200
Accumulated Amortization	0	0
Net Carrying Value	200	200
Trademarks, patents and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	68	71
Accumulated Amortization	(35)	(37)
Net Carrying Value	$ 33	$ 34

Carrying Value of Outstanding D

Carrying Value of Outstanding Debt (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 23,988,000,000
Debt instrument, stated interest rate	8.375%
Total debt	$ 23,092,000,000	$ 24,289,000,000
Less current maturities	(2,683,000,000)	(4,011,000,000)
Long-Term Debt	20,409,000,000	20,278,000,000
Commercial Paper
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 2,622,000,000
Maturity - Minimum Date	Mar. 31, 2017
Maturity - Maximum Date	Dec. 31, 2018
Total debt	$ 2,622,000,000	3,203,000,000
Senior notes | 5.50% stated rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750,000,000
Maturity - Maximum Date	Dec. 31, 2018
Debt instrument, stated interest rate	5.50%
Total debt	$ 0	751,000,000
Senior notes | 5.125% stated rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000,000,000
Maturity - Maximum Date	Dec. 31, 2019
Debt instrument, stated interest rate	5.125%
Total debt	$ 1,010,000,000	1,019,000,000
Senior notes | 3.125% stated rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,500,000,000
Maturity - Maximum Date	Dec. 31, 2021
Debt instrument, stated interest rate	3.125%
Total debt	$ 1,526,000,000	1,549,000,000
Senior notes | 2.050% senior notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 700,000,000
Maturity - Maximum Date	Dec. 31, 2021
Debt instrument, stated interest rate	2.05%
Total debt	$ 697,000,000	696,000,000
Senior notes | 2.400% senior note
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000
Maturity - Maximum Date	Dec. 31, 2026
Total debt	$ 497,000,000	497,000,000
Senior notes | 3.050% senior notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000,000,000
Maturity - Maximum Date	Dec. 31, 2027
Debt instrument, stated interest rate	3.05%
Total debt	$ 991,000,000	990,000,000
Senior notes | 2.45% senior notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000,000,000
Maturity - Maximum Date	Dec. 31, 2022
Debt instrument, stated interest rate	2.45%
Total debt	$ 961,000,000	979,000,000
Senior notes | 2.350% senior notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600,000,000
Maturity - Maximum Date	Dec. 31, 2022
Debt instrument, stated interest rate	2.35%
Total debt	$ 597,000,000	597,000,000
Senior notes | 2.500% senior notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000,000,000
Maturity - Maximum Date	Dec. 31, 2023
Debt instrument, stated interest rate	2.50%
Total debt	$ 993,000,000	992,000,000
Senior notes | 2.800% senior notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000
Maturity - Maximum Date	Dec. 31, 2024
Debt instrument, stated interest rate	2.80%
Total debt	$ 496,000,000	495,000,000
Senior notes | 6.20% stated rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,500,000,000
Maturity - Maximum Date	Dec. 31, 2038
Debt instrument, stated interest rate	6.20%
Total debt	$ 1,482,000,000	1,482,000,000
Senior notes | 4.875% stated rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000
Maturity - Maximum Date	Dec. 31, 2040
Debt instrument, stated interest rate	4.875%
Total debt	$ 490,000,000	489,000,000
Senior notes | 3.625% senior notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 375,000,000
Maturity - Maximum Date	Dec. 31, 2042
Debt instrument, stated interest rate	3.625%
Total debt	$ 368,000,000	368,000,000
Senior notes | 3.400% senior notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000
Maturity - Maximum Date	Dec. 31, 2046
Debt instrument, stated interest rate	3.40%
Total debt	$ 491,000,000	491,000,000
Senior notes | 3.750% senior notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,150,000,000
Maturity - Maximum Date	Dec. 31, 2047
Debt instrument, stated interest rate	3.75%
Total debt	$ 1,136,000,000	1,135,000,000
Senior notes | Floating Rate Senior Notes 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350,000,000
Maturity - Maximum Date	Dec. 31, 2021
Total debt	$ 349,000,000	348,000,000
Senior notes | 8.375% debentures
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 424,000,000
Maturity - Maximum Date	Dec. 31, 2029
Debt instrument, stated interest rate	8.375%
Total debt	$ 441,000,000	447,000,000
Senior notes | 8.375% debentures
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 276,000,000
Maturity - Maximum Date	Dec. 31, 2030
Total debt	$ 282,000,000	282,000,000
Senior notes | Canadian senior note 2.125%
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 580,000,000
Maturity - Maximum Date	Dec. 31, 2024
Debt instrument, stated interest rate	2.125%
Total debt	$ 577,000,000	593,000,000
Senior notes | Floating rate senior notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000,000
Maturity - Maximum Date	Dec. 31, 2022
Total debt	$ 398,000,000	398,000,000
Senior notes | Floating Rate Senior Notes 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000
Maturity - Maximum Date	Dec. 31, 2023
Total debt	$ 498,000,000	496,000,000
Senior notes | Floating Rate Senior Notes 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,043,000,000
Maturity - Minimum Date	Dec. 31, 2049
Maturity - Maximum Date	Dec. 31, 2067
Total debt	$ 1,031,000,000	1,032,000,000
Capital Lease Obligations
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 580,000,000
Maturity - Minimum Date	Dec. 31, 2018
Maturity - Maximum Date	Dec. 31, 3005
Total debt	$ 580,000,000	500,000,000
Pound Sterling notes | 5.500% notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 93,000,000
Maturity - Maximum Date	Dec. 31, 2031
Debt instrument, stated interest rate	5.50%
Total debt	$ 88,000,000	84,000,000
Pound Sterling notes | 5.125% notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 640,000,000
Maturity - Maximum Date	Jan. 1, 2022
Debt instrument, stated interest rate	5.125%
Total debt	$ 610,000,000	586,000,000
Euro Senior Notes | 0.375% Euro Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 862,000,000
Maturity - Maximum Date	Dec. 31, 2023
Debt instrument, stated interest rate	0.375%
Total debt	$ 856,000,000	832,000,000
Euro Senior Notes | 1.625% Euro Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 862,000,000
Maturity - Maximum Date	Dec. 31, 2025
Debt instrument, stated interest rate	1.625%
Total debt	$ 856,000,000	833,000,000
Euro Senior Notes | 1.000% notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 616,000,000
Maturity - Maximum Date	Dec. 31, 2028
Debt instrument, stated interest rate	1.00%
Total debt	$ 612,000,000	595,000,000
Euro Senior Notes | 1.500% Euro Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 616,000,000
Maturity - Maximum Date	Dec. 31, 2032
Debt instrument, stated interest rate	1.50%
Total debt	$ 611,000,000	594,000,000
Euro Senior Notes | Floating-rate senior notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 616,000,000
Maturity - Maximum Date	Dec. 31, 2020
Total debt	$ 614,000,000	598,000,000
Facility notes and bonds
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 320,000,000
Maturity - Minimum Date	Dec. 31, 2029
Maturity - Maximum Date	Dec. 31, 2045
Total debt	$ 319,000,000	319,000,000
Other debt
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 13,000,000
Maturity - Minimum Date	Dec. 31, 2018
Maturity - Maximum Date	Dec. 31, 2022
Total debt	$ 13,000,000	$ 19,000,000

DEBT AND FINANCING ARRANGEMEN57

DEBT AND FINANCING ARRANGEMENTS - Additional Information (Detail) € in Millions	Jan. 15, 2018USD ($)	May 15, 2017	May 11, 2017	Mar. 31, 2018USD ($)Credit_Agreements	Mar. 31, 2018EUR (€)Credit_Agreements	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Debt instrument, stated interest rate				8.375%	8.375%
Face value of debt instrument				$ 23,988,000,000
Number of credit agreements | Credit_Agreements				2	2
Covenants limit, amount of secured indebtedness and debt in sale-leaseback transactions, percentage of net tangible assets				10.00%	10.00%
Covenants that limit the amount of secured indebtedness and amount of attributable debt in sale-leaseback transactions, net tangible assets amount				$ 2,740,000,000
Sale-lease back outstanding				0
Secured debt outstanding				0
Long-term debt fair value				23,968,000,000		$ 25,206,000,000
U.S. Commercial Paper Program
Debt Instrument [Line Items]
Commercial paper program, authorized to borrow				$ 10,000,000,000
Foreign Commercial Paper Program
Debt Instrument [Line Items]
Commercial paper program, authorized to borrow | €					€ 5,000
Revolving Credit Facility Expiring In 2015 [Member]
Debt Instrument [Line Items]
Maturity				Mar. 22, 2019
Revolving credit facilities				$ 4,500,000,000
Applicable margin for base rate below LIBOR				1.00%
Revolving Credit Facility Expiring In 2017
Debt Instrument [Line Items]
Maturity				Mar. 24, 2022
Revolving credit facilities				$ 3,000,000,000
Applicable margin for base rate below LIBOR				1.00%
Revolving Credit Facility Expiring In 2017 | Minimum [Member]
Debt Instrument [Line Items]
Applicable margin for base rate below LIBOR				0.00%
Senior notes | 2.350% senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate				2.35%	2.35%
Face value of debt instrument				$ 600,000,000
Senior notes | Canadian senior note 2.125%
Debt Instrument [Line Items]
Debt instrument, stated interest rate				2.125%	2.125%
Face value of debt instrument				$ 580,000,000
Applicable margin rates		0.215%
Senior notes | 5.50% stated rate
Debt Instrument [Line Items]
Debt instrument, stated interest rate				5.50%	5.50%
Face value of debt instrument				$ 750,000,000
Repayments of Debt	$ 750,000,000
Commercial Paper
Debt Instrument [Line Items]
Face value of debt instrument				2,622,000,000
Commercial Paper | U.S. Commercial Paper Program
Debt Instrument [Line Items]
Total debt				$ 2,511,000,000
Debt, weighted average interest rate				1.73%	1.73%
Commercial Paper | Foreign Commercial Paper Program
Debt Instrument [Line Items]
Total debt				$ 111,000,000	€ 0
Debt, weighted average interest rate				0.43%	0.43%
LIBOR rate | Revolving Credit Facility Expiring In 2015 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable margin rates				0.10%
LIBOR rate | Revolving Credit Facility Expiring In 2015 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable margin rates				0.75%
LIBOR rate | Revolving Credit Facility Expiring In 2017
Debt Instrument [Line Items]
Applicable margin rates				1.00%
LIBOR rate | Revolving Credit Facility Expiring In 2017 | Minimum [Member]
Debt Instrument [Line Items]
Applicable margin rates				0.10%
LIBOR rate | Revolving Credit Facility Expiring In 2017 | Maximum [Member]
Debt Instrument [Line Items]
Applicable margin rates				0.75%
Citibank base rate | Revolving Credit Facility Expiring In 2015 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable margin rates				0.00%
Citibank base rate | Revolving Credit Facility Expiring In 2015 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable margin rates				1.00%
Federal Funds Rate | Revolving Credit Facility Expiring In 2015 [Member]
Debt Instrument [Line Items]
Applicable margin rates				0.50%
Federal Funds Rate | Revolving Credit Facility Expiring In 2017
Debt Instrument [Line Items]
Applicable margin rates				0.50%
LIBOR | Senior notes | Floating Rate Senior Notes Due 2067
Debt Instrument [Line Items]
Applicable margin rates				0.30%
LIBOR | Senior notes | Floating-rate senior notes:
Debt Instrument [Line Items]
Applicable margin rates			0.38%

LEGAL PROCEEDINGS AND CONTING58

LEGAL PROCEEDINGS AND CONTINGENCIES (Narratives) (Details) € in Millions, $ in Millions	Mar. 08, 2018EUR (€)	May 25, 2017USD ($)	Mar. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Settlement amount	€ 19.2	$ 9.4
Penalties related to settlement		$ 237.6
Loss Contingency Accrual			$ 9.4
Estimated losses			$ 247

SHAREOWNERS' EQUITY - Additiona

SHAREOWNERS' EQUITY - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)optionVoteClasses_of_Common_Stock$ / sharesshares	Mar. 31, 2017USD ($)shares	May 01, 2016USD ($)
Stockholders Equity Note [Line Items]
Classes of Common Stock, Number | Classes_of_Common_Stock	2
Preferred stock, shares authorized | shares	200,000,000
Preferred stock, par value | $ / shares	$ 0.01
Preferred stock, issued | shares	0
Common stock authorized for purchase, amount | $			$ 8,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $	$ 4,084
Noncontrolling Interest, Period Increase (Decrease) | $	$ 1	$ 1
Class A common stock
Stockholders Equity Note [Line Items]
Votes per common share | Vote	10
Common stock, par value | $ / shares	$ 0.01
Common stock, shares authorized | shares	4,600,000,000
Total of Class A and Class B common stock, repurchased, value | $	$ 0	$ 0
Common stock purchases | shares	1,000,000	1,000,000
Class B common stock
Stockholders Equity Note [Line Items]
Votes per common share | Vote	1
Common stock, par value | $ / shares	$ 0.01
Common stock, shares authorized | shares	5,600,000,000
Total of Class A and Class B common stock, repurchased, value | $	$ 0	$ 0
Common stock purchases | shares	1,000,000	3,000,000
Class A and B Common Stock
Stockholders Equity Note [Line Items]
Total of Class A and Class B common stock, repurchased, value | $	$ 255	$ 449
Common stock purchases | shares	2,200,000	4,200,000
Options Held [Member]
Stockholders Equity Note [Line Items]
Option premiums received | $	$ (39)	$ 27
Number of options open | option	900,000
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share | $ / shares	$ 102.57

Roll-forward of Common Stock, A

Roll-forward of Common Stock, Additional Paid-in Capital, and Retained Earnings Accounts (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	$ 994
Net income attributable to common shareowners	1,345	$ 1,166
Balance at end of period	$ 1,344
Common stock, cash paid for dividends, per share	$ 0.91	$ 0.83
Class A common stock
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	$ 2	$ 2
Balance at beginning of period, shares	173	180
Common stock purchases	$ 0	$ 0
Common stock purchases, shares	(1)	(1)
Stock award plans	$ 0	$ 0
Stock award plans, shares	3	3
Common stock issuances	$ 0	$ 0
Common stock issuances, shares	2	1
Conversions of class A to class B common stock	$ 0	$ 0
Conversions of Class A to Class B common stock, shares	(3)	(3)
Balance at end of period	$ 2	$ 2
Balance at end of period, shares	174	180
Class B common stock
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	$ 7	$ 7
Balance at beginning of period, shares	687	689
Common stock purchases	$ 0	$ 0
Common stock purchases, shares	(1)	(3)
Conversions of class A to class B common stock	$ 0	$ 0
Conversions of Class A to Class B common stock, shares	(3)	(3)
Balance at end of period	$ 7	$ 7
Balance at end of period, shares	689	689
Additional Paid-in Capital
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	$ 0	$ 0
Common stock purchases	(136)	(174)
Stock award plans	20	15
Common stock issuances	155	132
Option premiums received (paid)	(39)	27
Balance at end of period	0	0
Retained Earnings
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	5,852	4,880
Common stock purchases	(119)	(275)
Net income attributable to common shareowners	1,345	1,166
Balance at end of period	6,973	4,997
Dividends ($0.91 and $0.83 per share)	$ (840)	$ (774)
Reclassification from AOCI pursuant to the early adoption of ASU 2018-02			$ 735	$ 0

Activity in Accumulated Other C

Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ (4,867)
Translation adjustment (net of tax effect of $(9) and $(14))	(6)	$ 30
Current period changes in fair value (net of tax effect of $(1) and $0)	(3)	0
Current period changes in fair value (net of tax effect of $(33) and $(17))	(66)	(41)
Balance at end of period	(5,638)	(4,462)
Foreign currency translation gain (loss):
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(930)	(1,016)
Translation adjustment (net of tax effect of $(9) and $(14))	(6)	30
Balance at end of period	(983)	(986)
Unrealized gain (loss) on marketable securities, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(2)	(1)
Current period changes in fair value (net of tax effect of $(1) and $0)	(4)	0
Balance at end of period	(5)	(1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(1)	0
Unrealized gain (loss) on cash flow hedges, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(366)	(45)
Current period changes in fair value (net of tax effect of $(33) and $(17))	(102)	(30)
Reclassification to earnings (net of tax effect of $12 and $(7))	36	(11)
Balance at end of period	(511)	(86)
Reclassification to earnings, tax effect	12	(7)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(3,569)	(3,421)
Reclassification to earnings (net of tax effect of $12 and $18)	39	32
Balance at end of period	(4,139)	(3,389)
Income Tax Expense Benefit [Member] | Unrealized gain (loss) on marketable securities, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	1	0
Income Tax Expense Benefit [Member] | Unrealized gain (loss) on cash flow hedges, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification to earnings, tax effect	12	(7)
Income Tax Expense Benefit [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	12	18
Net Income [Member] [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TotalOtherComprehensiveIncomeReclassification, Net of Tax	(76)	(21)
Net Income [Member] [Member] | Unrealized gain (loss) on marketable securities, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(1)	0
Net Income [Member] [Member] | Unrealized gain (loss) on cash flow hedges, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification to earnings (net of tax effect of $12 and $(7))	36	(11)
Net Income [Member] [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification to earnings (net of tax effect of $12 and $18)	(39)	(32)
Labor and Related Expense [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(51)	(50)
Foreign exchange contracts | Interest Expense | Unrealized gain (loss) on cash flow hedges, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(42)	25
Interest rate contracts | Interest Expense | Unrealized gain (loss) on cash flow hedges, net of tax:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (6)	$ (7)

Activity in Accumulated Other62

Activity in Accumulated Other Comprehensive Income (Loss) (Phantoms) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (4,867)
Change in foreign currency translation adjustment, net of tax	(6)	$ 30
Balance at end of period	(5,638)	(4,462)
Foreign currency translation gain (loss):
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(930)	(1,016)
Change in foreign currency translation adjustment, net of tax	(6)	30
Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02			$ (47)	$ 0
Balance at end of period	(983)	(986)
Aggregate adjustment for the period, tax	(9)	(14)
Unrealized gain (loss) on marketable securities, net of tax:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(2)	(1)
Balance at end of period	(5)	(1)
Current period changes in fair value, tax effect	(1)	0
Reclassification to earnings, tax effect	0	0
Unrealized gain (loss) on cash flow hedges, net of tax:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(366)	(45)
Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02			(79)	0
Balance at end of period	(511)	(86)
Current period changes in fair value, tax effect	(33)	(17)
Reclassification to earnings, tax effect	12	(7)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(3,569)	(3,421)
Reclassification to retained earnings pursuant to the early adoption of ASU 2018-02			$ (609)	$ 0
Balance at end of period	(4,139)	(3,389)
Reclassification to earnings, tax effect	12	18
Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax	$ 0	$ 0

Activity in Deferred Compensati

Activity in Deferred Compensation Program (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	(1)
Balance at end of period	(1)
Balance at beginning of period	$ 994
Balance at end of period	$ 1,344
Treasury Stock [Member]
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	(1)	(1)
Reinvested dividends	0	0
Benefit payments	0	0
Balance at end of period	(1)	(1)
Balance at beginning of period	$ (37)	$ (45)
Reinvested dividends	(1)	(1)
Benefit payments	7	10
Balance at end of period	(31)	(36)
Deferred Compensation Obligations
Stockholders Equity Note [Roll Forward]
Balance at beginning of period	37	45
Reinvested dividends	(1)	(1)
Benefit payments	7	10
Balance at end of period	$ 31	$ 36

SHAREOWNERS' EQUITY Amounts Rec

SHAREOWNERS' EQUITY Amounts Reclassified from AOCI (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Income [Member] [Member]
AmountsReclassifiedFromAOCI [Line Items]
TotalOtherComprehensiveIncomeReclassification, Net of Tax	$ (76)	$ (21)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Income Tax Expense Benefit [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	1	0
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Investment income and other
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	(2)	0
Unrealized gain (loss) on cash flow hedges, net of tax:
AmountsReclassifiedFromAOCI [Line Items]
Reclassification to earnings, tax effect	12	(7)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(36)	11
Unrealized gain (loss) on cash flow hedges, net of tax: | Income Tax Expense Benefit [Member]
AmountsReclassifiedFromAOCI [Line Items]
Reclassification to earnings, tax effect	12	(7)
Unrealized gain (loss) on cash flow hedges, net of tax: | Net Income [Member] [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(36)	11
Unrealized gain (loss) on cash flow hedges, net of tax: | Interest rate contracts | Interest Expense
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(6)	(7)
Unrealized gain (loss) on cash flow hedges, net of tax: | Foreign exchange contracts | Interest Expense
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(42)	25
Accumulated Defined Benefit Plans Adjustment [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	39	32
Accumulated Defined Benefit Plans Adjustment [Member] | Labor and Related Expense [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(51)	(50)
Accumulated Defined Benefit Plans Adjustment [Member] | Income Tax Expense Benefit [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	12	18
Accumulated Defined Benefit Plans Adjustment [Member] | Net Income [Member] [Member]
AmountsReclassifiedFromAOCI [Line Items]
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	$ (39)	$ (32)

SEGMENT INFORMATION - Additiona

SEGMENT INFORMATION - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018Countries_and_TerritoriesSegments
Segment Reporting Information [Line Items]
Operating Segments, Number | Segments	3
International Package | Minimum
Segment Reporting Information [Line Items]
Number of countries and territories in which service is rendered	220
Supply Chain & Freight | Minimum
Segment Reporting Information [Line Items]
Number of countries and territories in which service is rendered	200

Segment Information (Detail)

Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 17,113	$ 15,510
Operating Profit	1,520	1,617
U.S. Domestic Package
Segment Reporting Information [Line Items]
Operating Profit	756	950
International Package
Segment Reporting Information [Line Items]
Operating Profit	594	518
Supply Chain & Freight
Segment Reporting Information [Line Items]
Operating Profit	170	149
U.S | U.S. Domestic Package
Segment Reporting Information [Line Items]
Revenue	10,227	9,536
International | International Package
Segment Reporting Information [Line Items]
Revenue	3,533	3,074
Supply Chain & Freight | Supply Chain & Freight
Segment Reporting Information [Line Items]
Revenue	$ 3,353	$ 2,900

Computation of Basic and Dilute

Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income attributable to common shareowners	$ 1,345	$ 1,166
Denominator:
Weighted average shares	861	869
Deferred compensation obligations	1	1
Vested portion of restricted shares	4	4
Denominator for basic earnings per share	866	874
Effect of dilutive securities:
Denominator for diluted earnings per share	870	879
Basic earnings per share (usd per share)	$ 1.55	$ 1.33
Diluted earnings per share (usd per share)	$ 1.55	$ 1.33
Restricted performance units
Effect of dilutive securities:
Incremental common shares attributable to share-based payment arrangements	4	4
Stock option plans
Effect of dilutive securities:
Incremental common shares attributable to share-based payment arrangements	0	1

EARNINGS PER SHARE - Additional

EARNINGS PER SHARE - Additional Information (Detail) - shares shares in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Shares excluded from diluted earnings per share that may be issued upon the exercise of employee stock options because such effect would be antidilutive	0	0.3

DERIVATIVE INSTRUMENTS AND RI69

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Collateral received under contractual provisions	$ 0	$ 17
Derivative net liability position	0	16
Pre-tax losses related to cash flow hedges that are currently deferred in AOCI and are expected to be reclassified to income within twelve months	$ 198
Maximum term over hedging exposures to the variability of cash flow	15 years
Change in Credit Rating
Derivative [Line Items]
Derivative, Additional Collateral, Obligation to Return Cash	$ 406	$ 174

Notional Amounts of Outstanding

Notional Amounts of Outstanding Derivative Positions (Detail) € in Millions, £ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	Mar. 31, 2018USD ($)	Mar. 31, 2018GBP (£)	Mar. 31, 2018SGD ($)	Mar. 31, 2018CAD ($)	Mar. 31, 2018MXN ($)	Mar. 31, 2018EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2017GBP (£)	Dec. 31, 2017SGD ($)	Dec. 31, 2017CAD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2017EUR (€)
Derivative [Line Items]
Derivative, Notional Amount		£ 1,785	$ 21	$ 1,393	$ 0	€ 4,652		£ 1,736	$ 11	$ 1,259	$ 169	€ 4,942
Fixed to Floating Interest Rate Swaps
Derivative [Line Items]
Derivative, Notional Amount	$ 4,674						$ 5,424
Floating to Fixed Interest Rate Swaps
Derivative [Line Items]
Derivative, Notional Amount	$ 778						$ 778
Investment market price contracts
Derivative [Line Items]
Derivative, Notional Amount | €						€ 0						€ 64

Location on the Balance Sheet o

Location on the Balance Sheet of Derivative Assets and Liabilities (Detail) - Fair Value, Inputs, Level 2 - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Asset Derivatives
Asset Derivatives	$ 90	$ 107
Net Amounts if Right of Offset had been Applied	58	87
Derivative Liabilities [Abstract]
Liability Derivatives	466	332
Net Amounts if Right of Offset had been Applied	434	312
Designated as Hedging Instrument | Foreign exchange contracts | Other current assets
Asset Derivatives
Asset Derivatives	4	2
Net Amounts if Right of Offset had been Applied	0	0
Designated as Hedging Instrument | Foreign exchange contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	9	1
Net Amounts if Right of Offset had been Applied	0	0
Designated as Hedging Instrument | Foreign exchange contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	144	93
Net Amounts if Right of Offset had been Applied	140	91
Designated as Hedging Instrument | Foreign exchange contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	249	194
Net Amounts if Right of Offset had been Applied	240	193
Designated as Hedging Instrument | Interest rate contracts | Other current assets
Asset Derivatives
Asset Derivatives	0	1
Net Amounts if Right of Offset had been Applied	0	1
Designated as Hedging Instrument | Interest rate contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	31	59
Net Amounts if Right of Offset had been Applied	10	43
Designated as Hedging Instrument | Interest rate contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	0	0
Net Amounts if Right of Offset had been Applied	0	0
Designated as Hedging Instrument | Interest rate contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	51	28
Net Amounts if Right of Offset had been Applied	30	12
Not Designated as Hedging Instrument | Foreign exchange contracts | Other current assets
Asset Derivatives
Asset Derivatives	14	18
Net Amounts if Right of Offset had been Applied	16	17
Not Designated as Hedging Instrument | Foreign exchange contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	8	0
Net Amounts if Right of Offset had been Applied	8	0
Not Designated as Hedging Instrument | Foreign exchange contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	15	1
Net Amounts if Right of Offset had been Applied	17	0
Not Designated as Hedging Instrument | Foreign exchange contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	7	0
Net Amounts if Right of Offset had been Applied	7	0
Not Designated as Hedging Instrument | Interest rate contracts | Other non-current assets
Asset Derivatives
Asset Derivatives	24	26
Net Amounts if Right of Offset had been Applied	24	26
Not Designated as Hedging Instrument | Interest rate contracts | Other non-current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	0	0
Net Amounts if Right of Offset had been Applied	0	0
Not Designated as Hedging Instrument | Investment market price contracts | Other current liabilities
Derivative Liabilities [Abstract]
Liability Derivatives	0	16
Net Amounts if Right of Offset had been Applied	$ 0	$ 16

Amount and Location in the Inco

Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments in Cash Flow Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (135)	$ (47)
Derivative Instruments in Cash Flow Hedging Relationships | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	1	0
Derivative Instruments in Cash Flow Hedging Relationships | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(136)	(47)
Non-derivative Instruments in Net Investment Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(80)	(37)
Non-derivative Instruments in Net Investment Hedging Relationships | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (80)	$ (37)

Amount and Location in the In73

Amount and Location in the Income Statement for Derivatives Designated as Fair Value Hedges (Detail) - Fair Value Hedging - Interest Expense - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Amount of Gain (Loss) Recognized in Income	$ (54)	$ (24)
Fixed-Rate Debt
Derivative Instruments, Gain (Loss) [Line Items]
Hedged Items Amount of Gain (Loss) Recognized in Income	$ 54	$ 24

Amount Recorded in Income State

Amount Recorded in Income Statements for Foreign Currency Forward Contracts Not Designated as Hedges (Detail) - Not Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 22	$ 30
Interest rate contracts | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	(2)	(2)
Foreign exchange contracts | Investment income and other
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	8	6
Investment market price contracts | Investment income and other
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 16	$ 26

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax
Effective tax rate	19.00%	31.80%
Deferred Tax Liabilities, Undistributed Foreign Earnings			$ 310
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)			24
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense			$ 606
Adjustment
Income Tax
Effective tax rate	(2.70%)	(3.20%)