Teradata (TDC) 10-K 26 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) shares in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2018	Jan. 31, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	TERADATA CORP /DE/
Entity Central Index Key	816,761
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Trading Symbol	TDC
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding (in shares)		117.3
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 4.8
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Revenue	$ 2,164	$ 2,156	$ 2,322
Cost of revenue
Cost of revenue	1,138	1,132	1,133
Gross profit	1,026	1,024	1,189
Operating expenses
Selling, general and administrative expenses	666	651	662
Research and development expenses	317	305	212
Impairment of goodwill and other assets	0	0	80
Total operating expenses	983	956	954
Income from operations	43	68	235
Interest expense	(22)	(15)	(12)
Interest income	14	11	6
Other expense	(8)	(6)	(8)
Total other expense, net	(16)	(10)	(14)
Income before income taxes	27	58	221
Income tax (benefit) expense	(3)	125	96
Net income (loss)	$ 30	$ (67)	$ 125
Net income (loss) per weighted average common share
Basic (in usd per share)	$ 0.25	$ (0.53)	$ 0.96
Diluted (in usd per share)	$ 0.25	$ (0.53)	$ 0.95
Weighted average common shares outstanding
Basic (in shares)	119.2	125.8	129.7
Diluted (in shares)	121.2	125.8	131.5
Recurring
Revenue
Revenue	$ 1,254	$ 1,145	$ 1,135
Cost of revenue
Cost of revenue	374	304	271
Perpetual software licenses and hardware
Revenue
Revenue	340	429	600
Cost of revenue
Cost of revenue	222	259	318
Consulting services
Revenue
Revenue	570	582	587
Cost of revenue
Cost of revenue	$ 542	$ 569	$ 544

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 30	$ (67)	$ 125
Other comprehensive income (loss):
Foreign currency translation adjustments	(13)	16	(7)
Derivatives:
Unrealized loss on derivatives, before tax	(7)	0	0
Unrealized loss on derivatives, tax portion	1	0	0
Unrealized loss on derivatives, net of tax	(6)	0	0
Defined benefit plans:
Reclassification of loss to net income (loss)	5	4	3
Defined benefit plan adjustment, before tax	(14)	(6)	(12)
Defined benefit plan adjustment, tax portion	1	1	3
Defined benefit plan adjustment, net of tax	(8)	(1)	(6)
Other comprehensive (loss) income	(27)	15	(13)
Comprehensive income (loss)	$ 3	$ (52)	$ 112

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 715	$ 1,089
Accounts receivable, net	588	554
Inventories	28	30
Other current assets	97	77
Total current assets	1,428	1,750
Property and equipment, net	295	162
Capitalized software, net	72	121
Goodwill	395	399
Acquired intangible assets, net	16	23
Deferred income taxes	67	57
Other assets	87	44
Total assets	2,360	2,556
Current liabilities
Current portion of long-term debt	19	60
Short-term borrowings	0	240
Accounts payable	141	74
Payroll and benefits liabilities	224	173
Deferred revenue	490	414
Other current liabilities	135	102
Total current liabilities	1,009	1,063
Long-term debt	478	478
Pension and other postemployment plan liabilities	113	109
Long-term deferred revenue	105	85
Deferred tax liabilities	3	4
Other liabilities	157	149
Total liabilities	1,865	1,888
Commitments and contingencies (Note 10)
Stockholders’ equity
Preferred stock: par value $0.01 per share, 100.0 shares authorized, no shares issued and outstanding at December 31, 2018 and 2017, respectively	0	0
Common stock: par value $0.01 per share, 500.0 shares authorized, 116.8 and 121.9 shares issued and outstanding at December 31, 2018 and 2017, respectively	1	1
Paid-in capital	1,418	1,320
Accumulated deficit	(823)	(579)
Accumulated other comprehensive loss	(101)	(74)
Total stockholders’ equity	495	668
Total liabilities and stockholders’ equity	$ 2,360	$ 2,556

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	116,800,000	121,900,000
Common stock, shares outstanding	116,800,000	121,900,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net income (loss)	$ 30	$ (67)	$ 125
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	130	138	128
Stock-based compensation expense	65	68	62
Deferred income taxes	(18)	(34)	(3)
Gain on investments	0	0	(2)
Impairment of goodwill, acquired intangibles and other assets	0	0	80
Changes in assets and liabilities, net of acquisitions:
Receivables	(34)	(6)	40
Inventories	2	3	14
Account payables and accrued expenses	108	12	11
Deferred revenue	115	115	1
Other assets and liabilities	(34)	95	(10)
Net cash provided by operating activities	364	324	446
Investing activities
Expenditures for property and equipment	(153)	(78)	(53)
Additions to capitalized software	(7)	(9)	(65)
Proceeds from sales of property and equipment	0	0	5
Proceeds from disposition of investments	0	0	2
Proceeds from sale of business	0	0	92
Business acquisitions and other investing activities, net	(3)	(21)	(16)
Net cash used in investing activities	(163)	(108)	(35)
Financing activities
Repayments of long-term borrowings	(40)	(30)	(30)
Proceeds from credit facility borrowings	0	420	0
Repayments of credit-facility borrowings	(240)	(180)	(180)
Repurchases of common stock	(300)	(351)	(82)
Payments of capital leases	(5)	0	0
Other financing activities, net	31	32	30
Net cash used in financing activities	(554)	(109)	(262)
Effect of exchange rate changes on cash and cash equivalents	(20)	8	(14)
(Decrease) increase in cash and cash equivalents	(373)	115	135
Total cash, cash equivalents and restricted cash	1,089	974	839
Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets
Total cash, cash equivalents and restricted cash	716	1,089	974
Total cash, cash equivalents and restricted cash	1,089	974	839
Non-cash investing and financing activities:
Assets acquired by capital lease	52	0	0
Cash paid during the year for:
Income taxes	33	25	105
Interest	$ 23	$ 14	$ 12

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2015		131
Beginning balance at Dec. 31, 2015	$ 849	$ 1	$ 1,128	$ (204)	$ (76)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	125			125
Employee stock compensation, employee stock purchase programs and option exercises (in shares)		3
Employee stock compensation, employee stock purchase programs and option exercises	92		92
Repurchases of Company common stock, retired (in shares)		(3)
Repurchases of common stock, retired	(82)			(82)
Pension and postemployment benefit plans, net of tax	(6)				(6)
Currency translation adjustment	(7)				(7)
Ending balance (in shares) at Dec. 31, 2016		131
Ending balance at Dec. 31, 2016	971	$ 1	1,220	(161)	(89)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(67)			(67)
Employee stock compensation, employee stock purchase programs and option exercises (in shares)		2
Employee stock compensation, employee stock purchase programs and option exercises	100		100
Repurchases of Company common stock, retired (in shares)		(11)
Repurchases of common stock, retired	(351)			(351)
Pension and postemployment benefit plans, net of tax	(1)				(1)
Currency translation adjustment	16				16
Ending balance (in shares) at Dec. 31, 2017		122
Ending balance at Dec. 31, 2017	668	$ 1	1,320	(579)	(74)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	30			30
Net income (loss) | Accounting Standards Update 2014-09	33
Employee stock compensation, employee stock purchase programs and option exercises (in shares)		2
Employee stock compensation, employee stock purchase programs and option exercises	98		98
Purchases of treasury stock, retired (in shares)		(7)
Repurchases of common stock, retired	(300)			(300)
Pension and postemployment benefit plans, net of tax	(8)				(8)
Unrealized loss on derivatives, net of tax	(6)				(6)
Currency translation adjustment	(13)				(13)
Ending balance (in shares) at Dec. 31, 2018		117
Ending balance at Dec. 31, 2018	$ 495	$ 1	$ 1,418	$ (823)	$ (101)

Description of Business, Basis

Description of Business, Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Description of Business, Basis of Presentation and Significant Accounting Policies [Abstract]
Description of Business, Basis of Presentation and Significant Accounting Policies	Description of Business, Basis of Presentation and Significant Accounting Policies Description of the Business. Teradata Corporation ("we," "us," "Teradata," or the "Company") is a leading hybrid cloud analytics software provider focusing on delivering pervasive data intelligence to our customers, which we define as the ability to leverage 100% of a company’s data to uncover real-time intelligence, at scale. We help customers integrate and simplify their analytics ecosystem, access and manage data, and use analytics to extract answers and derive business value from data. Our solutions and services comprise software, hardware, and related business consulting and support services to deliver analytics across a company’s entire analytical ecosystem. Basis of Presentation. The financial statements are presented on a consolidated basis and include the accounts of the Company and its wholly-owned subsidiaries in accordance with accounting principles generally accepted in the United States of America (“GAAP”). During the first quarter of 2018, the Company changed its historical presentation of its revenue and cost of revenue categories. Previously, the Company presented revenue and cost of revenue on two lines: product and cloud, and services. As part of the Company’s business transformation, the Company is transitioning away from perpetual transactions to subscription-based transactions. To better reflect this shift in the business, the Company adopted a revised presentation in the first quarter of 2018, including the separation of recurring revenue from non-recurring product and consulting services. Recurring revenue consists of our on-premises and off-premises subscriptions, which have varying term lengths from one month to five years. Recurring revenue is intended to depict the revenue recognition model for these subscription transactions. The recurrence of these revenue streams in future periods depends on several factors, including contractual periods and customers' renewal decisions. Perpetual software licenses and hardware revenue consists of hardware, perpetual software licenses, and subscription/term licenses recognized upfront. Consulting services revenue consists of consulting, implementation and installation services. In connection with these revisions, the Company also revised its cost of revenue classification to present costs associated with the new revenue presentation. This change in presentation does not affect the Company’s total revenues, total cost of revenues or overall total gross profit (defined as total revenue less total cost of revenue). Prior period amounts have been restated to conform to the current year presentation, unless otherwise stated that the prior period amounts have not been restated. Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and judgments that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and revenues and expenses during the period reported. On an ongoing basis, management evaluates these estimates and judgments, including those related to allowances for doubtful accounts, the valuation of inventory to net realizable value, impairments of goodwill and other intangibles, stock-based compensation, pension and other postemployment benefits, and income taxes and any changes will be accounted for on a prospective basis. Actual results could differ from those estimates. Revenue Recognition. In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (“Topic 606”) that affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. Topic 606 supersedes the revenue recognition requirements of the prior revenue recognition guidance used prior to January 1, 2018. The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective method for all contracts not completed as of the date of adoption. The reported results for 2018 reflect the application of Topic 606 while the reported results for 2016 and 2017 were prepared under the guidance of Accounting Standards Codification 605, Revenue Recognition , which is also referred to herein as the “previous guidance.” As a result, prior periods have not been restated and continue to be reported under the previous guidance. The cumulative effect of applying Topic 606 was recorded as an adjustment to accumulated deficit as of the adoption date. See Note 3 for the required disclosures related to the impact of adopting this standard. See Note 4 for costs to obtain and fulfill a customer contract. Revenue Recognition under Topic 606 The Company adopted Topic 606 as of January 1, 2018 for all contracts not completed as of the date of adoption. The core principle of Topic 606 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. To achieve that core principle, the Company performs the following five steps: 1. identify the contract with a customer, 2. identify the performance obligations in the contract, 3. determine the transaction price, 4. allocate the transaction price to the performance obligations in the contract, and 5. recognize revenue when (or as) the Company satisfies a performance obligation. The Company only applies the above five-step model to contracts when it is probable that the Company will collect the consideration it is entitled to in exchange for goods or services it transfers to the customer. The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience, published credit, and financial information pertaining to the customer. Revenue is measured based on consideration specified in a contract with a customer, and excludes any sales, value add, and other taxes the Company collects concurrent with revenue-producing activities. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a good or service to a customer. Estimates of variable consideration are included in revenue to the extent that it is probable that a significant reversal of cumulative revenue will not occur once the uncertainty is resolved. The Company uses the expected value method or the most likely amount method depending on the nature of the variable consideration. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. If actual results in the future vary from the Company’s estimates, the Company adjusts these estimates in the period such variances become known. Typically, the amount of variable consideration is not material. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using the relative standalone selling price of each distinct good or service in the contract. The Company must apply judgment to determine whether promised goods or services are capable of being distinct and distinct within the context of the contract. If these criteria are not met, the promised goods or services are combined with other goods or services and accounted for as a combined performance obligation. Revenue is then recognized either at a point in time or over time depending on our evaluation of when the customer obtains control of the promised goods or services. This evaluation requires significant 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 recorded in a given period. In addition, the Company has developed assumptions that require judgment to determine the standalone selling price for each performance obligation identified in the contract. The Company determines the standalone selling price for a good or service by considering multiple factors including, geographies, market conditions, product life cycles, competitive landscape, internal costs, gross margin objectives, purchase volumes and pricing practices. The Company reviews the standalone selling price for each of its performance obligations on a periodic basis and updates it, when appropriate, to ensure that the practices employed reflect the Company’s recent pricing experience. The Company maintains internal controls over the establishment and updates of these estimates, which includes review and approval by the Company’s management. Teradata delivers its solutions primarily through direct sales channels, as well as through other independent software vendors and distributors and value-added resellers. Standard payment terms may vary based on the country in which the contract is executed, but are generally between 30 days and 90 days. The following is a description of the principal activities and performance obligations from which the Company generates its revenue: • Subscriptions - The Company sells on and off-premises subscriptions to our customers through our subscription licenses, cloud, service model, and hardware rental offerings. Teradata’s subscription licenses include a right-to-use license and revenue is recognized upfront at a point in time unless the customer has a contractual right to cancel, where revenue is recognized on a month-to-month basis and is included within the recurring revenue caption. Subscription licenses recognized upfront are reported within the perpetual software licenses and hardware caption. Cloud and service model arrangements include a right-to-access software license on Teradata owned or third party owned hardware such as the public cloud. Revenue is recognized ratably over the contract term and included within the recurring revenue caption. Service models typically include a minimum fixed amount that is recognized ratably over the contract term and may include an elastic amount for usage above the minimum, which is recognized monthly based on actual utilization. For our hardware rental offering, the Company owns the hardware and may or may not provide managed services. The revenue for these arrangements is generally recognized straight-line over the term of the contract and is included within the recurring revenue caption. Hardware rentals are generally accounted for as operating leases and considered outside the scope of Topic 606. • Maintenance and software upgrade rights - Revenue for maintenance and unspecified software upgrade rights on a when-and-if-available basis are recognized straight-line over the term of the contract. • Perpetual software licenses and hardware - Revenue for software is generally recognized when the customer has the ability to use and benefit from its right to use the license. Hardware is typically recognized upon delivery once title and risk of loss have been transferred (when control has passed). • Consulting services - The Company accounts for individual services as separate performance obligations if a service is separately identifiable from other items in a combined arrangement and if a customer can benefit from it on its own or with other resources that are readily available to the customer. Revenue for consulting, implementation and installation services is recognized as services are provided by measuring progress toward the complete satisfaction of the Company’s obligation. Progress for services that are contracted for at a fixed price is generally measured based on hours incurred as a portion of total estimated hours. Progress for services that are contracted for on a time and materials basis is generally based on hours expended. These input methods ( e.g. hours incurred or expended) of revenue recognition are considered a faithful depiction of our efforts to satisfy services contracts and therefore reflect the transfer of services to a customer under such contracts. Significant Accounting Policies and Practical Expedients under Topic 606 The following are the Company’s significant accounting policies not already disclosed elsewhere and practical expedients relating to revenue from contracts with customers: • Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. • Shipping and handling costs associated with outbound freight after control over a product has transferred to a customer are accounted for as fulfillment cost and are included in cost of revenues. • The Company does not adjust for the effects of a significant financing component if the period between performance and customer payment is one year or less. • The Company expenses the costs to obtain a contract as incurred when the expected amortization period is one year or less. Revenue Recognition under Topic 605 (periods prior to January 1, 2018) Teradata records revenue when it is realized, or realizable, and earned. Teradata considers these requirements met when: • Persuasive evidence of an arrangement exists • The offerings or services have been delivered to the customer • The sales price is fixed or determinable and free of contingencies or significant uncertainties • Collectibility is reasonably assured Teradata reports revenue net of any taxes assessed by governmental authorities that are imposed on and concurrent with specific revenue-producing transactions. The Company assesses whether fees are fixed or determinable at the time of sale. Standard payment terms may vary based on the country in which the agreement is executed, but are generally between 30 days and 90 days. Payments that are due within six months are generally deemed to be fixed or determinable based on a successful collection history on such arrangements, and thereby satisfy the required criteria for revenue recognition. The Company’s deliverables often involve delivery or performance at different periods of time. The Company's deliverables include the following: • Subscription license - revenue for these arrangements is typically recognized ratably over the contract term. • Cloud and service model - revenue for these arrangements are recognized outside the software rules and revenue is recognized ratably over the contract term. • Rentals - revenue for these arrangements is generally recognized straight-line over the term of the contract and are generally accounted for as operating leases. • Perpetual software and hardware - revenue is generally recognized upon delivery once title and risk of loss have been transferred. • Unspecified software upgrades - revenue is recognized straight-line over the term of the arrangement. • Maintenance support services - revenue is recognized on a straight-line basis over the term of the contract. • Consulting, implementation and installation services - revenue is recognized as services are provided. In certain instances, acceptance of the product or service is specified by the customer. In such cases, revenue is deferred until the acceptance criteria have been met. Delivery and acceptance generally occur in the same reporting period. For multiple deliverable arrangements that contain non-software related deliverables, the Company allocates revenue to each deliverable based upon the relative selling price hierarchy and if software and software-related deliverables are also included in the arrangement, to those deliverables as a group based on the best estimate of selling price (“BESP”) for the group. The selling price for a deliverable is based on its vendor-specific objective evidence of selling price (“VSOE”) if available, third-party evidence of selling price (“TPE”) if VSOE is not available, or BESP if neither VSOE nor TPE is available. The Company then recognizes revenue when the remaining revenue recognition criteria are met for each deliverable. For the software group or arrangements that contain only software and software-related deliverables, the revenue is allocated utilizing the residual or fair value method. Under the residual method, the VSOE of the undelivered elements is deferred and accounted for under the applicable revenue recognition guidance, and the remaining portion of the software arrangement fee is allocated to the delivered elements and is recognized as revenue. The fair value method is similar to the relative selling price method used for non-software deliverables except that the allocation of each deliverable is based on VSOE. VSOE is based upon the normal pricing and discounting practices for those offerings and services when sold separately. Teradata uses the stated renewal rate approach in establishing VSOE for maintenance and when-and-if-available software upgrades. Under this approach, the Company assesses whether the contractually stated renewal rates are substantive and consistent with the Company’s normal pricing practices. Renewal rates greater than the lower level of our targeted pricing ranges are substantive and, therefore, meet the requirements to support VSOE. In instances where there is not a substantive renewal rate in the arrangement, the Company allocates revenue based upon BESP, using the minimum established pricing targets as supported by the renewal rates for similar customers utilizing the bell-curve method. VSOE for consulting services is based on the hourly rates for standalone consulting services projects by geographic region and are indicative of the Company’s customary pricing practices. Pricing in each market is structured to obtain a reasonable margin based on input costs. The Company determines BESP for a product or service by considering multiple factors including, but not limited to, geographies, market conditions, product life cycles, competitive landscape, internal costs, gross margin objectives, purchase volumes and pricing practices. The primary consideration in developing BESP for the Company’s platforms is the bell-curve method based on historical transactions. The BESP analysis is at the geography level to align it with the way in which the Company goes to market and establishes pricing for its offerings. BESP is analyzed on a semi-annual basis using data from the four previous quarters, which the Company believes best reflects most recent pricing practices in a changing marketplace. Shipping and Handling. Product shipping and handling are included in cost in the Consolidated Statements of Income (Loss). Cash and Cash Equivalents. All short-term, highly-liquid investments having original maturities of three months or less are considered to be cash equivalents. Allowance for Doubtful Accounts. Teradata establishes provisions for doubtful accounts using both percentages of accounts receivable balances to reflect historical average credit losses and specific provisions for known issues. Inventories. Inventories are stated at the lower of cost or market. Cost of service parts is determined using the average cost method. Finished goods inventory is determined using actual cost. Available-for-sale Securities. Available-for-sale securities are reported at fair value. Unrealized holding gains and losses are excluded from earnings and reported in other comprehensive income (loss). Realized gains and losses are included in other income and expense in the Consolidated Statements of Income (Loss). Long-Lived Assets Property and Equipment . Property and equipment, leasehold improvements and rental equipment are stated at cost less accumulated depreciation. Depreciation is computed over the estimated useful lives of the related assets primarily on a straight-line basis. Equipment is depreciated over 3 to 5 years and buildings over 25 to 45 years. Leasehold improvements are depreciated over the life of the lease or the asset, whichever is shorter. Total depreciation expense on the Company’s property and equipment for December 31 was as follows: In millions 2018 2017 2016 Depreciation expense $ 67 $ 55 $ 49 Capitalized Software . Direct development costs associated with internal-use software are capitalized and amortized over the estimated useful lives of the resulting software. The costs are capitalized when both the preliminary project stage is completed and it is probable that computer software being developed will be completed and placed in service. Teradata typically amortizes capitalized internal-use software on a straight-line basis over three years beginning when the asset is substantially ready for use. Costs incurred for the development of analytic applications are expensed as incurred based on the frequency and agile nature of development. Prior to 2017, costs incurred for the development of analytic database software that will be sold, leased or otherwise marketed were capitalized between technological feasibility and the point at which a product was ready for general release. Technological feasibility is established when planning, designing and initial coding activities that are necessary to establish the product can be produced to meet its design specifications are complete. In the absence of a program design, a working model is used to establish technological feasibility. These costs are included within capitalized software and are amortized over the estimated useful lives of four years using the greater of the ratio that current gross revenues for a product bear to the total of current and anticipated future gross revenues for that product or the straight-line method over the remaining estimated economic life of the product beginning when the product is available for general release. Costs capitalized include direct labor and related overhead costs. Costs incurred prior to technological feasibility and after general release are expensed as incurred. In 2016, our research and development efforts became more driven by market requirements and rapidly changing customers' needs. In addition, the Company started applying agile development methodologies to help respond to new technologies and trends. Agile development methodologies are characterized by a more dynamic development process with more frequent and iterative revisions to a product release features and functions as the software is being developed. Due to the shorter development cycle and focus on rapid production associated with agile development, the Company did not capitalize any amounts for external-use software development costs in 2018 and 2017 due to the relatively short duration between the completion of the working model and the point at which a product is ready for general release. Prior capitalized costs will continue to be amortized under the greater of revenue-based or straight-line method over the estimated useful life. The following table identifies the activity relating to capitalized software for the following periods: Internal-use Software External-use Software In millions 2018 2017 2016 2018 2017 2016 Beginning balance at January 1 $ 16 $ 13 $ 13 $ 105 $ 174 $ 177 Capitalized 6 9 6 — — 59 Amortization (7 ) (6 ) (6 ) (48 ) (69 ) (62 ) Ending balance at December 31 $ 15 $ 16 $ 13 $ 57 $ 105 $ 174 The aggregate amortization expense (actual and estimated) for internal-use and external-use software for the following periods is: Actual For the years ended (estimated) In millions 2018 2019 2020 2021 2022 2023 Internal-use software amortization expense $ 7 $ 6 $ 7 $ 7 $ 6 $ 6 External-use software amortization expense $ 48 $ 34 $ 23 $ — $ — $ — Estimated expense, which is recorded to cost of sales for external use software, is based on capitalized software at December 31, 2018 and does not include any new capitalization for future periods. Valuation of Long-Lived Assets. Long-lived assets such as property and equipment, acquired intangible assets and internal capitalized software are reviewed for impairment when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. An impairment is calculated based on the present value of future cash flows and an impairment loss would be recognized when estimated future undiscounted cash flows expected to result from the use of the asset and its eventual disposition are less than the carrying amount. No impairment was recognized during 2018. Goodwill . Goodwill represents the excess of the purchase price in a business combination over the fair value of net tangible and intangible assets acquired. Goodwill amounts are not amortized, but rather are tested for impairment annually or upon occurrence of an event or change in circumstances that would more likely than not reduce the fair value of a reporting unit below its carrying amount. See Note 5 for additional information. Warranty. Provisions for product warranties are recorded in the period in which the related revenue is recognized. The Company accrues warranty reserves using percentages of revenue to reflect the Company’s historical average warranty claims. See Note 10 for additional information. Research and Development Costs. Research and development costs are expensed as incurred (except for the capitalized software development costs discussed above). Research and development costs primarily include labor-related costs, contractor fees, and overhead expenses directly related to research and development support. Pension and Postemployment Benefits. The Company accounts for its pension benefit and its non-U.S. postemployment benefit obligations using actuarial models. The measurement of plan obligations was made as of December 31, 2018 . Liabilities are computed using the projected unit credit method. The objective under this method is to expense each participant’s benefits under the plan as they accrue, taking into consideration salary increases and the plan’s benefit allocation formula. Thus, the total pension or postemployment benefit to which each participant is expected to become entitled is broken down into units, each associated with a year of past or future credited service. The Company recognizes the funded status of its pension and non-U.S. postemployment plan obligations in its consolidated balance sheet and records, in other comprehensive income, certain gains and losses that arise during the period, but are deferred under pension and postemployment accounting rules. See Note 8 for additional information. Foreign Currency. Assets and liabilities of non-U.S. subsidiaries that operate in a local currency environment are translated into U.S. dollars at period-end exchange rates. Income and expense accounts are translated at daily exchange rates prevailing during the period. Adjustments arising from the translation are included in accumulated other comprehensive income, a separate component of stockholders’ equity. Gains and losses resulting from foreign currency transactions are included in determining net income. Income Taxes. Income tax expense is provided based on income before income taxes in the various jurisdictions in which the Company conducts its business. Deferred income taxes reflect the impact of temporary differences between assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes. These deferred taxes are determined based on the enacted tax rates expected to apply in the periods in which the deferred assets or liabilities are expected to be settled or realized. The Company made an accounting policy election in 2018 related to the Tax Act to provide for the tax expense related to global intangible low-taxed income (“GILTI”) in the year the tax is incurred. Teradata recognizes tax benefits from uncertain tax positions only if it is more likely than not the tax position will be sustained on examination by taxing authorities, based on the technical merits of the position. The Company records valuation allowances related to its deferred income tax assets when it is more likely than not that some portion or all the deferred income tax assets will not be realized. See Note 6 for additional information. Stock-based Compensation. Stock-based payments to employees, including grants of stock options, restricted shares and restricted share units, are recognized in the financial statements based on their fair value. The fair value of each stock option award on the grant date is estimated using the Black-Scholes option-pricing model with the following assumptions: expected dividend yield, expected stock price volatility, weighted-average risk-free interest rate and weighted average expected term of the options. The Company’s expected volatility assumption used in the Black-Scholes option-pricing model is based on Teradata's historical volatility. The expected term for options granted is based upon historical observation of actual time elapsed between date of grant and exercise of options for all employees. The risk-free interest rate used in the Black-Scholes model is based on the implied yield curve available on U.S. Treasury issues at the date of grant with a remaining term equal to the Company’s expected term assumption. The Company has never declared or paid a cash dividend. See Note 7 for additional information. Earnings (Loss) Per Share. Basic earnings (loss) per share is calculated by dividing net income (loss) by the weighted-average number of shares outstanding during the reported period. The calculation of diluted earnings per share is similar to basic earnings per share, except that the weighted-average number of shares outstanding includes the dilution from potential shares added from stock options, restricted share awards and other stock awards. Refer to Note 7 for share information on the Company’s stock compensation plans. The components of basic and diluted earnings (loss) per share for the years ended December 31 are as follows: In millions, except earnings (loss) per share 2018 2017 2016 Net income (loss) attributable to common stockholders $ 30 $ (67 ) $ 125 Weighted average outstanding shares of common stock 119.2 125.8 129.7 Dilutive effect of employee stock options, restricted shares and other stock awards 2.0 — 1.8 Common stock and common stock equivalents 121.2 125.8 131.5 Earnings (loss) per share: Basic $ 0.25 $ (0.53 ) $ 0.96 Diluted $ 0.25 $ (0.53 ) $ 0.95 For 2017, due to the net loss attributable to Teradata common stockholders, largely due to the tax expense recorded because of the Tax Cuts and Jobs Act of 2017, potential common shares that would cause dilution, such as employee stock options, restricted shares and other stock awards, have been excluded from the diluted share count because their effect would have been anti-dilutive. For 2017, the fully diluted shares would have been 127.8 million Options to purchase 2.6 million shares in 2018 , 2.7 million shares in 2017 and 5.2 million shares in 2016 of common stock, were not included in the computation of diluted earnings per share because their exercise prices were greater than the average market price of the common shares and, therefore, the effect would have been anti-dilutive. Recently Issued Accounting Pronouncements Leases. In February 2016, the Financial Accounting Standards Board (FASB) issued new guidance under Topic 842, which requires a lessee to account for leases as finance or operating leases. Both types of leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability on its balance sheet, with differing methodology for income statement recognition. For lessors, the standard modifies the classification criteria and the accounting for sales-type and direct financing leases. Entities will classify leases to determine how to recognize lease-related revenue and expense. This standard is effective for public entities for fiscal years, and interim periods within those years, beginning after December 15, 2018, and early adoption is permitted. We anticipate adopting this standard on January 1, 2019 using the prospective adoption approach with a cumulative-effect adjustment recognized to the opening balance of retained earnings on the adoption date with prior periods not recast and anticipate electing certain of the pra

Supplemental Financial Informat

Supplemental Financial Information	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Financial Information	Supplemental Financial Information At December 31 In millions 2018 2017 Accounts receivable Trade $ 590 $ 559 Other 12 7 Accounts receivable, gross 602 566 Less: allowance for doubtful accounts (14 ) (12 ) Total accounts receivable, net $ 588 $ 554 Inventories Finished goods $ 16 $ 18 Service parts 12 12 Total inventories $ 28 $ 30 Property and equipment Land $ 8 $ 8 Buildings and improvements 84 82 Capital lease assets 52 — Machinery and other equipment 495 404 Property and equipment, gross 639 494 Less: accumulated depreciation (344 ) (332 ) Total property and equipment, net $ 295 $ 162 Other current liabilities Sales and value-added taxes $ 34 $ 30 Pension and other postemployment plan liabilities 10 9 Capital lease obligations - current portion 17 — Other 74 63 Total other current liabilities $ 135 $ 102 Deferred revenue Deferred revenue, current $ 490 $ 414 Long-term deferred revenue 105 85 Total deferred revenue $ 595 $ 499 Other long-term liabilities Transition tax $ 102 $ 133 Capital lease obligations 30 — Uncertain tax positions 17 14 Other 8 2 Total other long-term liabilities $ 157 $ 149

(Notes)

(Notes)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers Disaggregation of Revenue from Contracts with Customers The following table presents a disaggregation of revenue for the years ended December 31: In millions 2018 2017* 2016* Americas Recurring $ 801 $ 739 $ 703 Perpetual software licenses and hardware 127 234 369 Consulting services 198 222 262 Total Americas 1,126 1,195 1,334 International Recurring 453 406 368 Perpetual software licenses and hardware 213 195 231 Consulting services 372 360 320 Total International 1,038 961 919 Marketing applications — — 69 Total Revenue $ 2,164 $ 2,156 $ 2,322 *As noted above, prior period amounts have not been adjusted under the modified retrospective adoption method of Topic 606; however, as discussed in Note 1, prior period revenue captions have been reclassified to conform to the current year presentation. Hardware rental revenue, included in recurring revenue, was $32 million in 2018, $17 million in 2017 and $7 million in 2016. Contract Balances The timing of revenue recognition, billings and cash collections results in billed accounts receivable, contract assets, and customer advances and deposits (deferred revenue or contract liabilities) on the consolidated balance sheet. Accounts receivable include amounts due from customers that are unconditional. Contract assets relate to the Company’s rights to consideration for goods delivered or services completed and recognized as revenue but billing and the right to receive payment is conditional upon the completion of other performance obligations. Contract assets are included in other current assets on the balance sheet and are transferred to accounts receivable when the rights become unconditional. Deferred revenue consists of advance payments and billings in excess of revenue recognized. Deferred revenue is classified as either current or noncurrent based on the timing of when the Company expects to recognize revenue. These assets and liabilities are reported on a contract-by-contract basis at the end of each reporting period. The following table provides information about receivables, contract assets and deferred revenue from contracts with customers: In millions December 31, 2018 January 1, 2018 (as adjusted) Accounts receivable, net $ 588 $ 534 Contract assets $ 14 $ 20 Current deferred revenue $ 490 $ 395 Long-term deferred revenue $ 105 $ 85 Revenue recognized during the twelve months ended December 31, 2018 from amounts included in deferred revenue at the beginning of the period was approximately $384 million Transaction Price Allocated to Unsatisfied Obligations The following table includes estimated revenue expected to be recognized in the future related to the Company's unsatisfied (or partially satisfied) obligations at December 31, 2018: In millions Total at December 31, 2018 Year 1 Year 2 and Thereafter Remaining unsatisfied obligations $ 2,547 $ 1,200 $ 1,347 The amounts above represent the price of firm orders for which work has not been performed or goods have not been delivered and exclude unexercised contract options outside the stated contractual term that do not represent material rights to the customer. Although the Company believes that the contract value in the above table is firm, approximately $1,468 million of the amount includes customer-only general cancellation for convenience terms that the Company is contractually obligated to perform unless the customer notifies us. The Company expects to recognize revenue of approximately $729 million in the next year from contracts that are non-cancelable. Customers typically do not cancel before the end of the contractual term and historically the Company has seen very little churn in its customer base. The Company believes the inclusion of this information is important to understanding the obligations that the Company is contractually required to perform and provides useful information regarding remaining obligations related to these executed contracts. Impacts on Financial Statements The Company adopted Topic 606 using the modified retrospective method. The cumulative effect of applying the new guidance to all contracts with customers that were not completed as of January 1, 2018 was recorded as an adjustment to accumulated deficit as of the adoption date. As a result of applying the modified retrospective method to adopt Topic 606, the following adjustments were made to accounts on the consolidated balance sheets as of January 1, 2018: • The Company reduced current deferred revenue and accumulated deficit by $19 million for contracts that were not complete as of the date of adoption and would have been recognized in a prior period under Topic 606. The revenue adjustment primarily relates to term licenses that are recognized upfront under Topic 606 but were recognized ratably under the previous guidance. • Prior to the adoption of Topic 606, the Company expensed sales commissions on long-term contracts. Under Topic 606, the Company capitalizes these incremental costs of obtaining customer contracts. The impact of this change resulted in an increase of other assets and a reduction in accumulated deficit of $17 million on January 1, 2018. • The tax impact of these items was $10 million , which was recorded as a deferred tax liability, resulting in a net $26 million reduction in accumulated deficit on January 1, 2018. • In addition, the Company reclassified $20 million of contract assets from accounts receivable to other current assets on January 1, 2018. The following summarizes the significant changes on the Company’s consolidated financial statements for the twelve months ended December 31, 2018 because of the adoption of Topic 606 on January 1, 2018 compared to if the Company had continued to recognize revenue under the previous guidance: • The impact to revenues was a net increase of $15 million for the twelve months ended December 31, 2018, under Topic 606. • Topic 606 resulted in the amortization of capitalized contract costs that were recorded as part of the cumulative effect adjustment upon adoption. The amortization of these capitalized costs was offset by new capitalized costs in the period resulting in $37 million less selling, general and administrative expenses for the twelve months ended December 31, 2018 under Topic 606. • Because of higher revenue and the capitalization of contract costs under Topic 606, net income reported under Topic 606 was higher by $33 million or $0.27 per share for the twelve months ended December 31, 2018. • Total reported assets at December 31, 2018 were $43 million higher under Topic 606, which includes $54 million of capitalized contract costs that were expensed as incurred under the previous guidance, partially offset by $11 million of deferred costs related to the timing of revenue that would have been deferred under the previous guidance but recognized under Topic 606. • Total reported liabilities were $16 million less under Topic 606 primarily due to revenue that would have been deferred and recognized over time under the previous guidance, but is recognized upfront under Topic 606, offset by the change in deferred tax liability. The adoption of Topic 606 had no impact on the Company’s total cash flows from operations. Contract Costs The Company capitalizes sales commissions and other contract costs that are incremental direct costs of obtaining customer contracts if the expected amortization period of the asset is greater than one year. These costs are recorded in Other Assets on the Company’s balance sheet. The capitalized amounts are calculated based on the total contract value for individual multi-term contracts. The judgments made in determining the amount of costs incurred include whether the commissions are in fact incremental and would not have occurred absent the customer contract. Costs to obtain a contract are amortized as selling, general and administrative expenses on a straight-line basis over the expected period of benefit, which is typically four years. These costs are periodically reviewed for impairment. The following table identifies the activity relating to capitalized contract costs: In millions January 1, 2018 Capitalized Amortization December 31, 2018 Capitalized contract costs 17 44 (7 ) 54

Contract Costs

Contract Costs	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract Costs	Revenue from Contracts with Customers Disaggregation of Revenue from Contracts with Customers The following table presents a disaggregation of revenue for the years ended December 31: In millions 2018 2017* 2016* Americas Recurring $ 801 $ 739 $ 703 Perpetual software licenses and hardware 127 234 369 Consulting services 198 222 262 Total Americas 1,126 1,195 1,334 International Recurring 453 406 368 Perpetual software licenses and hardware 213 195 231 Consulting services 372 360 320 Total International 1,038 961 919 Marketing applications — — 69 Total Revenue $ 2,164 $ 2,156 $ 2,322 *As noted above, prior period amounts have not been adjusted under the modified retrospective adoption method of Topic 606; however, as discussed in Note 1, prior period revenue captions have been reclassified to conform to the current year presentation. Hardware rental revenue, included in recurring revenue, was $32 million in 2018, $17 million in 2017 and $7 million in 2016. Contract Balances The timing of revenue recognition, billings and cash collections results in billed accounts receivable, contract assets, and customer advances and deposits (deferred revenue or contract liabilities) on the consolidated balance sheet. Accounts receivable include amounts due from customers that are unconditional. Contract assets relate to the Company’s rights to consideration for goods delivered or services completed and recognized as revenue but billing and the right to receive payment is conditional upon the completion of other performance obligations. Contract assets are included in other current assets on the balance sheet and are transferred to accounts receivable when the rights become unconditional. Deferred revenue consists of advance payments and billings in excess of revenue recognized. Deferred revenue is classified as either current or noncurrent based on the timing of when the Company expects to recognize revenue. These assets and liabilities are reported on a contract-by-contract basis at the end of each reporting period. The following table provides information about receivables, contract assets and deferred revenue from contracts with customers: In millions December 31, 2018 January 1, 2018 (as adjusted) Accounts receivable, net $ 588 $ 534 Contract assets $ 14 $ 20 Current deferred revenue $ 490 $ 395 Long-term deferred revenue $ 105 $ 85 Revenue recognized during the twelve months ended December 31, 2018 from amounts included in deferred revenue at the beginning of the period was approximately $384 million Transaction Price Allocated to Unsatisfied Obligations The following table includes estimated revenue expected to be recognized in the future related to the Company's unsatisfied (or partially satisfied) obligations at December 31, 2018: In millions Total at December 31, 2018 Year 1 Year 2 and Thereafter Remaining unsatisfied obligations $ 2,547 $ 1,200 $ 1,347 The amounts above represent the price of firm orders for which work has not been performed or goods have not been delivered and exclude unexercised contract options outside the stated contractual term that do not represent material rights to the customer. Although the Company believes that the contract value in the above table is firm, approximately $1,468 million of the amount includes customer-only general cancellation for convenience terms that the Company is contractually obligated to perform unless the customer notifies us. The Company expects to recognize revenue of approximately $729 million in the next year from contracts that are non-cancelable. Customers typically do not cancel before the end of the contractual term and historically the Company has seen very little churn in its customer base. The Company believes the inclusion of this information is important to understanding the obligations that the Company is contractually required to perform and provides useful information regarding remaining obligations related to these executed contracts. Impacts on Financial Statements The Company adopted Topic 606 using the modified retrospective method. The cumulative effect of applying the new guidance to all contracts with customers that were not completed as of January 1, 2018 was recorded as an adjustment to accumulated deficit as of the adoption date. As a result of applying the modified retrospective method to adopt Topic 606, the following adjustments were made to accounts on the consolidated balance sheets as of January 1, 2018: • The Company reduced current deferred revenue and accumulated deficit by $19 million for contracts that were not complete as of the date of adoption and would have been recognized in a prior period under Topic 606. The revenue adjustment primarily relates to term licenses that are recognized upfront under Topic 606 but were recognized ratably under the previous guidance. • Prior to the adoption of Topic 606, the Company expensed sales commissions on long-term contracts. Under Topic 606, the Company capitalizes these incremental costs of obtaining customer contracts. The impact of this change resulted in an increase of other assets and a reduction in accumulated deficit of $17 million on January 1, 2018. • The tax impact of these items was $10 million , which was recorded as a deferred tax liability, resulting in a net $26 million reduction in accumulated deficit on January 1, 2018. • In addition, the Company reclassified $20 million of contract assets from accounts receivable to other current assets on January 1, 2018. The following summarizes the significant changes on the Company’s consolidated financial statements for the twelve months ended December 31, 2018 because of the adoption of Topic 606 on January 1, 2018 compared to if the Company had continued to recognize revenue under the previous guidance: • The impact to revenues was a net increase of $15 million for the twelve months ended December 31, 2018, under Topic 606. • Topic 606 resulted in the amortization of capitalized contract costs that were recorded as part of the cumulative effect adjustment upon adoption. The amortization of these capitalized costs was offset by new capitalized costs in the period resulting in $37 million less selling, general and administrative expenses for the twelve months ended December 31, 2018 under Topic 606. • Because of higher revenue and the capitalization of contract costs under Topic 606, net income reported under Topic 606 was higher by $33 million or $0.27 per share for the twelve months ended December 31, 2018. • Total reported assets at December 31, 2018 were $43 million higher under Topic 606, which includes $54 million of capitalized contract costs that were expensed as incurred under the previous guidance, partially offset by $11 million of deferred costs related to the timing of revenue that would have been deferred under the previous guidance but recognized under Topic 606. • Total reported liabilities were $16 million less under Topic 606 primarily due to revenue that would have been deferred and recognized over time under the previous guidance, but is recognized upfront under Topic 606, offset by the change in deferred tax liability. The adoption of Topic 606 had no impact on the Company’s total cash flows from operations. Contract Costs The Company capitalizes sales commissions and other contract costs that are incremental direct costs of obtaining customer contracts if the expected amortization period of the asset is greater than one year. These costs are recorded in Other Assets on the Company’s balance sheet. The capitalized amounts are calculated based on the total contract value for individual multi-term contracts. The judgments made in determining the amount of costs incurred include whether the commissions are in fact incremental and would not have occurred absent the customer contract. Costs to obtain a contract are amortized as selling, general and administrative expenses on a straight-line basis over the expected period of benefit, which is typically four years. These costs are periodically reviewed for impairment. The following table identifies the activity relating to capitalized contract costs: In millions January 1, 2018 Capitalized Amortization December 31, 2018 Capitalized contract costs 17 44 (7 ) 54

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangible Assets	Goodwill and Acquired Intangible Assets The following table identifies the activity relating to goodwill by operating segment: In millions Balance at December 31, 2017 Additions Currency Balance at December 31, 2018 Goodwill Americas $ 253 $ — $ — $ 253 International 146 — (4 ) 142 Total goodwill $ 399 $ — $ (4 ) $ 395 In the fourth quarter of 2018, the Company performed its annual impairment test of goodwill and determined that no impairment to the carrying value of goodwill was necessary. The Company reviewed two reporting units in its 2018 goodwill impairment assessment, as both geographic operating segments were considered separate reporting units for purposes of testing. Based on the Company's evaluation and weighting of the events and circumstances that have occurred since the most recent quantitative test, the Company concluded that it was not more likely than not that each reporting unit's fair value was below its carrying value. Therefore, the Company determined that it was not necessary to perform a quantitative goodwill impairment test for the reporting units in 2018. Acquired intangible assets were specifically identified when acquired and are deemed to have finite lives. The gross carrying amount and accumulated amortization for Teradata’s acquired intangible assets were as follows: December 31, 2018 December 31, 2017 In millions Amortization Life (in Years) Gross Carrying Amount Accumulated Amortization and Currency Translation Adjustments Gross Carrying Amount Accumulated Amortization and Currency Translation Adjustments Acquired intangible assets Intellectual property/developed technology 1 to 7 $ 35 $ (20 ) $ 43 $ (20 ) During 2018, the gross carrying amount of acquired intangibles was reduced by certain intangible assets previously acquired that became fully amortized and were removed from the balance sheet. The aggregate amortization expense (actual and estimated) for acquired intangible assets for the following periods is: Actual For the years ended (estimated) In millions 2016 2017 2018 2019 2020 2021 2022 Amortization expense $ 10 $ 8 $ 7 $ 5 $ 4 $ 4 $ 2

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the years ended December 31, income (loss) before income taxes consisted of the following: In millions 2018 2017 2016 Income (loss) before income taxes United States $ (79 ) $ (26 ) $ 93 Foreign 106 84 128 Total income before income taxes $ 27 $ 58 $ 221 For the years ended December 31, income tax (benefit) expense consisted of the following: In millions 2018 2017 2016 Income tax (benefit) expense Current Federal $ (10 ) $ 132 $ 67 State and local 6 2 7 Foreign 19 25 25 Deferred Federal (20 ) (22 ) 7 State and local (4 ) (4 ) 1 Foreign 6 (8 ) (11 ) Total income tax (benefit) expense $ (3 ) $ 125 $ 96 Effective income tax rate (11.1 %) 215.5 % 43.4 % The following table presents the principal components of the difference between the effective tax rate and the United States federal statutory income tax rate for the years ended December 31 : In millions 2018 2017 2016 Income tax expense at the U.S. federal tax rate 21.0 % 35.0 % 35.0 % Foreign income tax differential 2.1 % (22.6 )% (14.0 )% U.S. tax on foreign earnings 2.0 % 4.3 % 0.9 % State and local income taxes (25.0 )% (11.0 )% 0.2 % U.S. permanent book/tax differences (2.7 )% (1.5 )% 1.3 % U.S. research and development tax credits (29.5 )% (11.2 )% (1.6 )% Change in valuation allowance 27.7 % 10.0 % 0.8 % U.S. manufacturing deduction permanent difference — % (8.0 )% (3.5 )% Goodwill impairment — % — % 8.9 % Tax impact of sale of marketing applications business — % — % 9.9 % Tax impact of equity compensation (1.4 )% 0.7 % 2.4 % Tax impact of U.S. tax law change - IRC Section 987 — % — % 3.5 % Deferred tax impact from U.S. rate change from Tax Reform — % (27.0 )% — % Tax impact of U.S. Tax Reform/ Transition Tax (23.9 )% 250.0 % — % Tax Impact of uncertain tax positions 20.2 % (3.6 )% (0.6 )% Other, net (1.6 )% 0.4 % 0.2 % Effective income tax rate (11.1 )% 215.5 % 43.4 % The 2018 and 2017 effective tax rates were impacted by the Tax Act, which was signed into law on December 22, 2017, making significant changes to the United States Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of United States international taxation from a worldwide tax system to a modified territorial tax system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. On December 22, 2017, Staff Accounting Bulletin No. 118 ("SAB 118") was issued to address the application of GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Act. In accordance with SAB 118, the Company completed its analysis of the impact of the Tax Act during the fourth quarter of 2018 in accordance with its understanding of the Tax Act and guidance available as of the date of this filing. For the year ended December 31, 2018, the Company recorded a $6 million tax benefit as an adjustment to the 2017 provisional estimate in accordance with SAB 118 because of additional regulatory guidance and changes in interpretations and assumptions the Company initially made as a result of the Tax Act. Effective in 2018, the Tax Act subjects United States shareholders to a tax on GILTI earned by certain foreign subsidiaries. The Company has elected to provide for the tax expense related to GILTI in the year the tax is incurred. For 2018, the Company recorded $1 million of tax expense for GILTI tax. In the fourth quarter of 2017, the Company recorded $126 million as additional income tax expense as its provisional estimate of the impact of the Tax Act. The amount included $145 million of tax expense for the one-time transition tax on cumulative foreign earnings of $1.3 billion , which the Company will pay over an 8-year period ending in 2025. In addition, a tax benefit of $19 million was recorded, a majority of which related to the re-measurement of certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future. The 2016 effective tax rate was impacted by the $57 million of goodwill impairment charges recorded in the first quarter of 2016, all of which was treated as a permanent, non-deductible tax item. In addition, a discrete tax charge of $22 million was recorded in the third quarter of 2016 related to the tax impact of the sale of the marketing applications business, which occurred on July 1, 2016. In the fourth quarter of 2016, the Company recorded $8 million of tax expense associated with the issuance of new U.S. Treasury Regulations under Internal Revenue Code Section 987 on December 7, 2016, which clarified how companies calculate foreign currency translation gains and losses for income tax purposes for branches whose accounting records are kept in a currency other than the currency of the Company. Also, in the fourth quarter of 2016, the Company elected to early adopt Accounting Standards Update 2016-09, Improvements to Employee Share-based Payment Accounting. As a result, the Company incurred a $5 million discrete tax expense associated with the net shortfall arising from 2016 equity compensation vestings and exercises. Deferred income tax assets and liabilities included in the balance sheets at December 31 were as follows: In millions 2018 2017 Deferred income tax assets Employee pensions and other liabilities $ 49 $ 50 Other balance sheet reserves and allowances 18 13 Tax loss and credit carryforwards 63 59 Deferred revenue 20 3 Other — 2 Total deferred income tax assets 150 127 Valuation allowance (39 ) (32 ) Net deferred income tax assets 111 95 Deferred income tax liabilities Intangibles and capitalized software 17 30 Property and equipment 11 12 Other 19 — Total deferred income tax liabilities 47 42 Total net deferred income tax assets $ 64 $ 53 As of December 31, 2018, Teradata has net operating loss ("NOL") and tax credit carryforwards totaling $63 million (tax effected and before any valuation allowance offset and application of recognition criteria for uncertain tax positions). Of the total tax carryforwards, $11 million are NOL's in the United States and certain foreign jurisdictions, a small portion of which will begin to expire in 2020, $1 million are United States foreign tax credit carryforwards which expire in 2028, which has a full valuation allowance offset; and $51 million are California R&D tax credits that have an indefinite carryforward period (which have a $38 million valuation allowance offset recorded). Prior to the enactment of the Tax Act, the Company had not provided for taxes on the undistributed earnings of its foreign subsidiaries as the Company either reinvested or intended to reinvest those earnings outside of the United States. Because of the 2017 Tax Act, the Company has changed its indefinite reinvestment assertion related to foreign earnings that have been taxed in the United States and now considers a majority of these earnings no longer indefinitely reinvested. Because of United States tax reform legislation, distributions of profits from non-U.S. subsidiaries are not expected to cause a significant United States tax impact in the future. However, these distributions may be subject to non-U.S. withholding taxes if profits are distributed from certain jurisdictions. The Company has recorded $1 million of deferred foreign withholding tax expense with respect to certain earnings which are not considered permanently reinvested as they would be taxable upon remittance. Deferred taxes have not been provided on earnings considered indefinitely reinvested as it is not expected that the distribution of these earnings would give rise to a material tax liability. The Company may recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The Company reflects any interest and penalties recorded in connection with its uncertain tax positions as a component of income tax expense. As of December 31, 2018, the Company’s uncertain tax positions totaled approximately $34 million , of which $17 million is reflected in the other liabilities section of the Company’s balance sheet as a non-current liability. The remaining balance of $17 million of uncertain tax positions relates to certain tax attributes both generated by the Company and acquired in various acquisitions, which are netted against the underlying deferred tax assets recorded on the balance sheet. The entire balance of $34 million in uncertain tax positions would cause a decrease in the effective income tax rate upon recognition. Teradata has recorded $2 million of interest accruals related to its uncertain tax liabilities as of December 31, 2018. Below is a roll-forward of the Company’s liability related to uncertain tax positions at December 31 : In millions 2018 2017 Balance at January 1 $ 28 $ 30 Gross decreases for prior period tax positions — (1 ) Gross increases for prior period tax positions 3 — Gross increases for current period tax positions 8 3 Decreases due to the lapse of applicable statute of limitations (1 ) (4 ) Decreases relating to settlements with taxing authorities (4 ) — Balance at December 31 $ 34 $ 28 On July 24, 2018, the Ninth Circuit Court of Appeals issued an opinion in Altera Corp. v. Commissioner requiring related parties in an intercompany cost-sharing arrangement to share expenses related to stock-based compensation. This opinion reversed the prior decision of the United States Tax Court. On August 7, 2018, the Ninth Circuit published an order withdrawing its opinion and is re-examining the opinion. The Company is awaiting the revised opinion of the Court to determine the impact, if any, on the Company. The Company and its subsidiaries file income tax returns in the United States and various state jurisdictions, as well as numerous foreign jurisdictions. As of December 31, 2018, the Company has ongoing tax audits in a limited number of state and foreign jurisdictions. However, no material adjustments have been proposed or made in any of these examinations to date, which would result in any incremental income tax expense in future periods to the Company. The Company's tax returns for years 2015-2018 are still open for assessment by tax authorities in its major jurisdictions.

Employee Stock-based Compensati

Employee Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock-based Compensation Plans	Employee Stock-based Compensation Plans The Company recorded stock-based compensation expense for the years ended December 31 as follows: In millions 2018 2017 2016 Stock options $ 6 $ 9 $ 9 Restricted shares 56 56 51 Employee share repurchase program 3 3 2 Total stock-based compensation before income taxes 65 68 62 Tax benefit (11 ) (21 ) (13 ) Total stock-based compensation, net of tax $ 54 $ 47 $ 49 The Teradata Corporation 2007 Stock Incentive Plan (the “2007 SIP”), as amended, and the Teradata 2012 Stock Incentive Plan (the “2012 SIP”) provide for the grant of several different forms of stock-based compensation. The 2012 SIP was adopted and approved by stockholders in April 2012 and no further awards may be made under the 2007 SIP after that time. A total of approximately 17.5 million shares were authorized to be issued under the 2012 SIP. New shares of the Company’s common stock are issued as a result of the vesting of restricted share units and stock option exercises and at the time of grant for restricted shares, for awards under both plans. As of December 31, 2018 , the Company’s primary types of stock-based compensation were stock options, restricted shares, restricted share units and the employee stock purchase program (the “ESPP”). Stock Options The Compensation and Human Resource Committee of Teradata’s Board of Directors has discretion to determine the material terms and conditions of option awards under both the 2007 SIP and the 2012 SIP (collectively, the “Teradata SIP”), provided that (i) the exercise price must be no less than the fair market value of Teradata common stock (as defined in both plans) on the date of grant, and (ii) the term must be no longer than ten years . Option grants generally have a four -year vesting period. No options were granted in 2018. The weighted-average fair value of options granted for Teradata equity awards was $11.08 in 2017 and $10.68 in 2016 . The fair value of each option award on the grant date was estimated using the Black-Scholes option-pricing model with the following assumptions: 2017 2016 Dividend yield — % — % Risk-free interest rate 1.99 % 2.08 % Expected volatility 35.0 % 35.2 % Expected term (years) 6.3 6.3 The following table summarizes the Company’s stock option activity for the year ended December 31, 2018 : Shares in thousands Shares Under Option Weighted- Average Exercise Price per Share Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Outstanding at January 1, 2018 5,373 $ 37.63 4.5 $ 30 Granted — $ — Exercised (885 ) $ 23.69 Canceled (207 ) $ 47.79 Forfeited (133 ) $ 30.12 Outstanding at December 31, 2018 4,148 $ 40.34 3.8 $ 15 Fully vested and expected to vest at December 31, 2018 4,148 $ 40.34 3.8 $ 15 Exercisable at December 31, 2018 3,608 $ 42.05 3.2 $ 10 The following table summarizes the total intrinsic value of options exercised and the cash received by the Company from option exercises under all share-based payment arrangements at December 31 : In millions 2018 2017 2016 Intrinsic value of options exercised $ 15 $ 6 $ 13 Cash received from option exercises $ 21 $ 19 $ 18 Tax benefit realized from option exercises $ 3 $ 2 $ 5 As of December 31, 2018 , there was $6 million of total unrecognized compensation cost related to unvested stock option grants. That cost is expected to be recognized over a weighted-average period of 1.7 years. Restricted Shares and Restricted Share Units The Teradata SIP provides for the issuance of restricted shares, as well as restricted share units. These grants consist of both service-based and performance-based awards. Service-based awards typically vest over a three -year period beginning on the effective date of grant. These grants are not subject to future performance measures. The cost of these awards, determined to be the fair market value at the date of grant, is expensed ratably over the vesting period. For substantially all restricted share grants, at the date of grant, the recipient has all rights of a stockholder, subject to certain restrictions on transferability and a risk of forfeiture. A recipient of restricted share units does not have the rights of a stockholder and is subject to restrictions on transferability and risk of forfeiture. For both restricted share grants and restricted share units, any potential dividend rights would be subject to the same vesting requirements as the underlying equity award. As a result, such rights are considered a contingent transfer of value and consequently these equity awards are not considered participating securities. Performance-based grants are subject to future performance measurements over a one -to three -year period. All performance-based shares that are earned in respect of an award will become vested at the end of the performance and/or service period provided the employee is continuously employed by the Company and applicable performance measures and other vesting conditions are met. The fair value of each performance-based award is determined on the grant date, based on the Company’s stock price, and assumes that performance targets will be achieved. Over the performance period, the number of shares of stock that will be issued is adjusted upward or downward based upon management’s assessment of the probability of achievement of performance targets. The ultimate number of shares issued and the related compensation cost recognized as expense will be based on a comparison of the final achievement of performance metrics to the specified targets. The following table reports restricted shares and restricted share unit activity during the year ended December 31, 2018 : Shares in thousands Number of Shares Weighted- Average Grant Date Fair Value per Share Unvested shares at January 1, 2018 4,226 $ 32.76 Granted 994 $ 37.98 Vested (1,636 ) $ 37.86 Forfeited/canceled (353 ) $ 34.44 Unvested shares at December 31, 2018 3,231 $ 34.27 The following table summarizes the weighted-average fair value of restricted share units granted for Teradata equity awards and the total fair value of shares vested. 2018 2017 2016 Weighted-average fair value of restricted share units granted $ 37.98 $ 34.88 $ 26.61 Total fair value of shares vested (in millions) $ 53 $ 50 $ 61 As of December 31, 2018 , there was $67 million of unrecognized compensation cost related to unvested restricted share grants. The unrecognized compensation cost is expected to be recognized over a remaining weighted-average period of 1.95 years. The following table represents the composition of Teradata restricted share unit grants in 2018 : Shares in thousands Number of Shares Weighted- Average Grant Date Fair Value Service-based shares 482 $ 39.32 Performance-based shares 512 $ 36.62 Total stock grants 994 $ 37.98 In 2016 and 2017, performance-based share units granted as part of our long-term incentive program for certain corporate officers and key executives will be earned based on Teradata's total shareholder return ("TSR") over a three -year performance period relative to the other companies in the S&P 1500 Information Technology Index. The number of shares issued, as a percentage of the amount subject to the performance share award, could range from 0% to 200% . The grant date fair value of the non-vested performance-based awards was determined using a Monte Carlo simulation model, which utilized multiple input variables that determined the probability of satisfying the market condition requirements applicable to each award. The compensation expense for the award will be recognized if the requisite service is rendered, regardless of whether the market conditions are achieved. Employee Stock Purchase Program The Company’s ESPP, effective on October 1, 2007 , and as amended effective as of January 1, 2013 , provides eligible employees of Teradata and its designated subsidiaries an opportunity to purchase the Company’s common stock at a discount to the average of the highest and lowest sale prices on the last trading day of each month. The ESPP discount is 15% of the average market price and is considered compensatory. Employees may authorize payroll deductions of up to 10% of eligible compensation for common stock purchases. A total of 7 million shares were authorized to be issued under the ESPP, with approximately 2.7 million shares remaining under that authorization at December 31, 2018 . The shares of Teradata common stock purchased by a participant on an exercise date (the last day of each month), for all purposes, are deemed to have been issued and sold at the close of business on such exercise date. Prior to that time, none of the rights or privileges of a stockholder exists with respect to such shares. Employee purchases and aggregate cost were as follows at December 31 : In millions 2018 2017 2016 Employee share purchases 0.5 0.6 0.6 Aggregate cost $ 17 $ 15 $ 13

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Pension and Postemployment Plans. Teradata currently sponsors defined benefit pension plans for certain of its international employees. For those international pension plans for which the Company holds asset balances, those assets are primarily invested in common/collective trust funds (which include publicly traded common stocks, corporate and government debt securities, real estate indirect investments, cash or cash equivalents) and insurance contracts. Postemployment obligations relate to benefits provided to involuntarily terminated employees and certain inactive employees after employment but before retirement. These benefits are paid in accordance with various foreign statutory laws and regulations, and Teradata’s established postemployment benefit practices and policies. Postemployment benefits may include disability benefits, supplemental unemployment benefits, severance, workers’ compensation benefits, continuation of health care benefits and life insurance coverage, and are funded on a pay-as-you-go basis. Pension and postemployment benefit costs for the years ended December 31 were as follows: 2018 2017 2016 In millions Pension Postemployment Pension Postemployment Pension Postemployment Service cost $ 8 $ 8 $ 9 $ 7 $ 8 $ 6 Interest cost 3 1 3 1 3 1 Expected return on plan assets (2 ) — (2 ) — (2 ) — Settlement charge — — — — 1 — Curtailment charge (1 ) — — — — — Amortization of actuarial loss 1 4 1 2 1 1 Amortization of prior service (credit) cost — — (1 ) 1 — 2 Divestiture — — — — (2 ) (1 ) Total costs $ 9 $ 13 $ 10 $ 11 $ 9 $ 9 The underfunded amount of pension and postemployment obligations is recorded as a liability in the Company’s consolidated balance sheet. The following tables present the changes in benefit obligations, plan assets, funded status and the reconciliation of the funded status to amounts recognized in the consolidated balance sheets and in accumulated other comprehensive income at December 31 : Pension Postemployment In millions 2018 2017 2018 2017 Change in benefit obligation Benefit obligation at January 1 $ 136 $ 120 $ 47 $ 42 Service cost 8 9 8 7 Interest cost 3 3 1 1 Plan participant contributions 1 1 — — Actuarial (gain) loss (5 ) (3 ) 12 12 Benefits paid (2 ) (4 ) (14 ) (15 ) Curtailment (1 ) — — — Settlement (4 ) — — — Currency translation adjustments (4 ) 10 — — Benefit obligation at December 31 $ 132 $ 136 $ 54 $ 47 Change in plan assets Fair value of plan assets at January 1 $ 75 $ 64 $ — $ — Actual return on plan assets (2 ) 5 — — Company contributions 5 5 — — Benefits paid (2 ) (4 ) — — Currency translation adjustments (1 ) 4 — — Plan participant contribution 1 1 — — Settlements (4 ) — — — Other (4 ) — — — Fair value of plan assets at December 31 68 75 — — Funded status (underfunded) $ (64 ) $ (61 ) $ (54 ) $ (47 ) Amounts Recognized in the Consolidated Balance Sheet Non-current assets $ 5 $ 10 $ — $ — Current liabilities (1 ) (2 ) (9 ) (7 ) Non-current liabilities (68 ) (69 ) (45 ) (40 ) Net amounts recognized $ (64 ) $ (61 ) $ (54 ) $ (47 ) Amounts Recognized in Accumulated Other Comprehensive Income (Loss) Unrecognized Net actuarial loss $ 16 $ 15 $ 44 $ 37 Unrecognized Prior service (credit) cost — (1 ) 3 3 Total $ 16 $ 14 $ 47 $ 40 The following table presents the accumulated pension benefit obligation at December 31 : In millions 2018 2017 Accumulated pension benefit obligation $ 122 $ 125 The following table presents pension plans with accumulated benefit obligations in excess of plan assets at December 31 : In millions 2018 2017 Projected benefit obligation $ 68 $ 69 Accumulated benefit obligation $ 61 $ 63 Fair value of plan assets $ — $ — The following table presents the pre-tax net changes in projected benefit obligations recognized in other comprehensive income: Pension Postemployment In millions 2018 2017 2018 2017 Actuarial (gain) loss arising during the year $ (2 ) $ (7 ) $ 12 $ 13 Amortization of loss included in net periodic benefit cost (1 ) (1 ) (4 ) (2 ) Prior service (credit) cost arising during the year — — — (1 ) Recognition of gain due to curtailment 1 — — — Foreign currency exchange (1 ) 2 — — Total recognized in other comprehensive (loss) income $ (3 ) $ (6 ) $ 8 $ 10 The following table presents the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost during 2019 : In millions Pension Postemployment Net loss to be recognized in other comprehensive income $ 1 $ 5 The weighted-average rates and assumptions used to determine benefit obligations at December 31, and net periodic benefit cost for the years ended December 31, were as follows: Pension Benefit Obligations Pension Benefit Cost 2018 2017 2018 2017 2016 Discount rate 2.2% 2.1% 2.1% 2.0% 2.4% Rate of compensation increase 3.4% 3.3% 3.3% 3.3% 3.2% Expected return on plan assets N/A N/A 2.8% 2.9% 3.0% Postemployment Benefit Obligations Postemployment Benefit Cost 2018 2017 2018 2017 2016 Discount rate 2.5% 2.6% 2.5% 2.6% 3.4% Rate of compensation increase 3.0% 3.0% 3.0% 3.0% 3.0% Involuntary turnover rate 2.5% 2.3% 2.5% 2.3% 2.0% The Company determines the expected return on assets based on individual plan asset allocations, historical capital market returns, and long-term interest rate assumptions, with input from its actuaries, investment managers, and independent investment advisors. The company emphasizes long-term expectations in its evaluation of return factors, discounting or ignoring short-term market fluctuations. Expected asset returns are reviewed annually, but are generally modified only when asset allocation strategies change or long-term economic trends are identified. International discount rates were determined by examining interest rate levels and trends within each country, particularly yields on high-quality long-term corporate bonds, relative to our future expected cash flows. The discount rate used for countries with individually insignificant benefit obligation at year-end was derived by matching the plans’ expected future cash flows to the corresponding yields from the Citigroup Pension Liability Index. This yield curve has been constructed to represent the available yields on high-quality fixed-income investments across a broad range of future maturities. Gains and losses have resulted from changes in actuarial assumptions and from differences between assumed and actual experience, including, among other items, changes in discount rates and differences between actual and assumed asset returns. These gains and losses (except those differences being amortized to the market-related value) are only amortized to the extent that they exceed 10% of the higher of the market-related value of plan assets or the projected benefit obligation of each respective plan. Plan Assets. The weighted-average asset allocations at December 31, by asset category are as follows: Actual Asset Allocation as of December 31 Target Asset 2018 2017 Allocation Equity securities 32% 32% 32% Debt securities 51% 41% 50% Insurance (annuity) contracts 12% 17% 12% Real-estate 3% 8% 3% Other 2% 2% 3% Total 100% 100% 100% Investment Strategy. Teradata employs several investment strategies across its various international pension plans. In some countries, particularly where Teradata does not have a large employee base, the Company may use insurance (annuity) contracts to satisfy its future pension payment obligations, whereby the Company makes pension plan contributions to an insurance company in exchange for which the pension plan benefits will be paid when the members reach a specified retirement age or on earlier exit of members from the plan. In other countries, the Company may employ local asset managers to manage investment portfolios according to the investment policies and guidelines established by the Company, and with consideration to individual plan liability structure and local market environment and risk tolerances. The Company’s investment policies and guidelines primarily emphasize diversification across and within asset classes to maximize long-term returns subject to prudent levels of risk, with the overall objective of enabling the plans to meet their future obligations. The investment portfolios contain a diversified blend of equity and fixed-income investments. Furthermore, equity investments are diversified across domestic and international stocks, small and large capitalization stocks, and growth and value stocks. Fixed-income assets are diversified across government and corporate bonds. Where applicable, real estate investments are made through real estate securities, partnership interests or direct investment, and are diversified by property type and location. Fair Value. Fair value measurements are established utilizing a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers are more fully described in Note 11. The following is a description of the valuation methodologies used for pension assets as of December 31, 2018 . Common/collective trust funds (which include money market funds, equity funds, bond funds, real-estate indirect investments, etc.) : Valued at the net asset value (“NAV”) of shares held by the Plan at year end, as reported to the Plan by the trustee, which represents the fair value of shares held by the Plan. Because the NAV of the shares held in the common/collective trust funds are derived by the value of the underlying investments, the Company has classified these underlying investments as Level 2 fair value measurements. Insurance contracts: Valued by discounting the related future benefit payments using a current year-end market discount rate, which represents the fair value of the insurance contract. The Company has classified these contracts as Level 3 assets for fair value measurement purposes. The following table sets forth by level, within the fair value hierarchy, the pension plan assets at fair value as of December 31, 2018 : Fair Value Measurements at Reporting Date Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs In millions December 31, 2018 (Level 1) (Level 2) (Level 3) Money market funds $ 1 $ — $ 1 $ — Equity funds 22 — 22 — Bond/fixed-income funds 35 — 35 — Real-estate indirect investments 2 — 2 — Insurance contracts 8 — — 8 Total assets at fair value $ 68 $ — $ 60 $ 8 The table below sets forth a summary of changes in the fair value of the pension plan level 3 assets for the year ended December 31, 2018 : In millions Insurance Contracts Balance as of January 1, 2018 $ 12 Purchases, sales and settlements, net (4 ) Balance as of December 31, 2018 $ 8 The following table sets forth by level, within the fair value hierarchy, the pension plan assets at fair value as of December 31, 2017 : Fair Value Measurements at Reporting Date Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs In millions December 31, 2017 (Level 1) (Level 2) (Level 3) Money market funds $ 2 $ — $ 2 $ — Equity funds 24 — 24 — Bond/fixed-income funds 31 — 31 — Real-estate indirect investments 6 — 6 — Insurance contracts 12 — — 12 Total assets at fair value $ 75 $ — $ 63 $ 12 The table below sets forth a summary of changes in the fair value of the pension plan level 3 assets for the year ended December 31, 2017 : In millions Insurance Contracts Balance as of January 1, 2017 $ 11 Purchases, sales and settlements, net 1 December 31, 2017 $ 12 Cash Flows Related to Employee Benefit Plans Cash Contributions. In 2019, the Company expects to contribute approximately $4 million to the international pension plans. Estimated Future Benefit Payments. The Company expects to make the following benefit payments, estimated based on the assumptions used to measure the company's benefit obligation at the end of the year, reflecting past and future service from its pension and postemployment plans: Pension Postemployment In millions Benefits Benefits Year 2019 $ 3 $ 9 2020 $ 4 $ 9 2021 $ 5 $ 9 2022 $ 5 $ 9 2023 $ 5 $ 9 2024 - 2028 $ 31 $ 44 Savings Plans. United States employees and many international employees participate in defined contribution savings plans. These plans generally provide either a specified percent of pay or a matching contribution on participating employees’ voluntary elections. The Company’s matching contributions typically are subject to a maximum percentage or level of compensation. Employee contributions can be made pre-tax, after-tax or a combination thereof. The following table identifies the expense for the United States and International subsidiary savings plans for the years ended December 31 : In millions 2018 2017 2016 U.S. savings plan $ 22 $ 21 $ 19 International subsidiary savings plans $ 17 $ 17 $ 16

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities As a portion of Teradata’s operations is conducted outside the United States and in currencies other than the U.S. dollar, the Company is exposed to potential gains and losses from changes in foreign currency exchange rates. In an attempt to mitigate the impact of currency fluctuations, the Company uses foreign exchange forward contracts to hedge transactional exposures resulting predominantly from foreign currency denominated inter-company receivables and payables. The forward contracts are designated as fair value hedges of specified foreign currency denominated inter-company receivables and payables and generally mature in three months or less. The fair values of foreign exchange contracts are based on market spot and forward exchange rates and represent estimates of possible value that may not be realized in the future. Across its portfolio of contracts, Teradata has both long and short positions relative to the U.S. dollar. As a result, Teradata’s net involvement is less than the total contract notional amount of the Company’s foreign exchange forward contracts. In June 2018, Teradata executed a five -year interest rate swap with a $500 million initial notional amount to hedge the floating interest rate of its Term Loan, as more fully described in Note 12. The Company uses interest rate swaps to manage interest rate risks on future interest payments caused by interest rate changes on its variable rate term loan facility. The notional amount of the hedge will step-down according to the amortization schedule of the term loan. The Company performed an initial effectiveness assessment in the second quarter of 2018 on the interest rate swap and the hedge was determined to be effective. The hedge is being evaluated qualitatively on a quarterly basis for effectiveness. Changes in fair value are recorded in Accumulated Other Comprehensive Income and periodic settlements of the swap will be recorded in interest expense along with the interest on amounts outstanding under the term loan facility. The following table identifies the contract notional amount of the Company’s hedging instruments at December 31 : In millions 2018 2017 Contract notional amount of foreign exchange forward contracts $ 256 $ 147 Net contract notional amount of foreign exchange forward contracts $ 35 $ 23 Contract notional amount of interest rate swap $ 500 $ — All derivatives are recognized in the consolidated balance sheets at their fair value. The notional amounts represent agreed-upon amounts on which calculations of dollars to be exchanged are based and are an indication of the extent of Teradata’s involvement in such instruments. These notional amounts do not represent amounts exchanged by the parties and, therefore, are not a measure of the instruments. Refer to Note 11 for disclosures related to the fair value of all derivative assets and liabilities. The Company does not hold or issue derivative financial instruments for trading purposes, nor does it hold or issue leveraged derivative instruments. By using derivative financial instruments to hedge exposures to changes in foreign exchange and interest rates, the Company exposes itself to credit risk. The Company manages exposure to counterparty credit risk by entering into derivative financial instruments with highly rated institutions that can be expected to fully perform under the terms of the applicable contracts.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the ordinary course of business, the Company is subject to proceedings, lawsuits, governmental investigations, claims and other matters, including those that relate to the environment, health and safety, employee benefits, export compliance, intellectual property, tax matters and other regulatory compliance and general matters. We are not currently a party to any litigation, nor are we aware of any pending or threatened litigation against us that we believe would materially affect our business, operating results, financial condition or cash flows. Guarantees and Product Warranties. Guarantees associated with the Company’s business activities are reviewed for appropriateness and impact to the Company’s financial statements. Periodically, the Company’s customers enter into various leasing arrangements coordinated with a leasing company. In some instances, the Company guarantees the leasing company a minimum value at the end of the lease term on the leased equipment. As of December 31, 2018 , the maximum future payment obligation of this guaranteed value and the associated liability balance was $3 million . The Company provides its customers a standard manufacturer’s warranty and records, at the time of the sale, a corresponding estimated liability for potential warranty costs. Estimated future obligations due to warranty claims are based upon historical factors such as labor rates, average repair time, travel time, number of service calls and cost of replacement parts. For each consummated sale, the Company recognizes the total customer revenue and records the associated warranty liability using pre-established warranty percentages for that product class. The following table identifies the activity relating to the warranty reserve liability for the years ended December 31 : In millions 2018 2017 2016 Beginning balance at January 1 $ 4 $ 5 $ 6 Accruals for warranties issued 5 6 8 Settlements (in cash or kind) (6 ) (7 ) (9 ) Balance at end of period $ 3 $ 4 $ 5 The Company also offers extended and/or enhanced coverage to its customers in the form of maintenance contracts. Teradata accounts for these contracts by deferring the related maintenance revenue over the extended and/or enhanced coverage period. Costs associated with maintenance support are expensed as incurred. Amounts associated with these maintenance contracts are not included in the table above. In addition, the Company provides its customers with certain indemnification rights. In general, the Company agrees to indemnify the customer if a third party asserts patent or other infringement on the part of the customer for its use of the Company’s offerings. The Company has indemnification obligations under its charter and bylaws to its officers and directors, and has entered into indemnification agreements with the officers and directors of its subsidiaries. From time to time, the Company also enters into agreements in connection with its acquisition and divesture activities that include indemnification obligations by the Company, including the sale of the marketing applications business. The fair value of these indemnification obligations is typically not readily determinable due to the conditional nature of the Company’s potential obligations and the specific facts and circumstances involved with each particular agreement. As such, the Company has generally not recorded a liability in connection with these indemnification arrangements. Historically, payments made by the Company under these types of agreements have not had a material effect on the Company’s consolidated financial condition, results of operations or cash flows. Leases. Teradata conducts certain of its sales and administrative operations using leased facilities, the initial lease terms of which vary in length. Many of the leases contain renewal options and escalation clauses that are not material to the overall lease portfolio. Future minimum operating lease payments and committed subleases under non-cancelable leases as of December 31, 2018 , for the following fiscal years were: In millions Total Amounts 2019 2020 2021 2022 2022 and Thereafter Operating lease obligations $ 73 $ 24 $ 20 $ 12 $ 11 $ 6 Sublease rentals (10 ) (6 ) (4 ) — — — Total committed operating leases less sublease rentals $ 63 $ 18 $ 16 $ 12 $ 11 $ 6 The following table represents the Company’s actual rental expense and sublease rental income for the years ended December 31 : In millions 2018 2017 2016 Rental expense $ 24 $ 24 $ 24 Sublease rental income $ 6 $ 5 $ 3 The Company had no contingent rentals for these periods.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value measurements are established utilizing a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2, defined as significant other observable inputs, such as quoted prices in active markets for similar assets or liabilities, or quoted prices in less-active markets for identical assets; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assets and liabilities measured at fair value on a recurring basis include money market funds, interest rate swaps and foreign currency exchange contracts. A portion of the Company’s excess cash reserves are held in money market funds which generate interest income based on the prevailing market rates. Money market funds are included in cash and cash equivalents in the Company’s balance sheet. Money market fund holdings are measured at fair value using quoted market prices and are classified within Level 1 of the valuation hierarchy. When deemed appropriate, the Company minimizes its exposure to changes in foreign currency exchange rates using derivative financial instruments, specifically, foreign exchange forward contracts. Additionally, in June 2018, Teradata executed a five -year interest rate swap with a $500 million initial notional amount to hedge the floating interest rate on its term-loan. The fair value of these contracts and swaps are measured at the end of each interim reporting period using observable inputs other than quoted prices, specifically market spot and forward exchange rates. As such, these derivative instruments are classified within Level 2 of the valuation hierarchy. Fair value gains for open contracts are recognized as assets and fair value losses are recognized as liabilities. The fair value of interest rate swaps recorded in other liabilities at December 31, 2018 was $7 million . The hedge is being evaluated qualitatively on a quarterly basis for effectiveness. Changes in fair value are recorded in Accumulated Other Comprehensive Income. The fair value of foreign exchange forward contracts recorded in other assets and accrued liabilities at December 31, 2018 and December 31, 2017, were not material. Any realized gains or losses would be mitigated by corresponding gains or losses on the underlying exposures. Gains and losses from the Company’s fair value hedges (foreign currency forward contracts and related hedged items) were immaterial for the years ended December 31, 2018, 2017 and 2016. The Company’s assets and liabilities measured at fair value on a recurring basis and subject to fair value disclosure requirements at December 31, 2018 and December 31, 2017 were as follows: Fair Value Measurements at Reporting Date Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs In millions Total (Level 1) (Level 2) (Level 3) Assets Money market funds at December 31, 2018 $ 246 $ 246 $ — $ — Money market funds at December 31, 2017 $ 501 $ 501 $ — $ — Liabilities Interest rate swap at December 31, 2018 $ 7 $ — $ 7 $ —

Debt and Capital Leases

Debt and Capital Leases	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt and Capital Leases	Debt and Capital Leases On June 11, 2018, Teradata replaced its existing five-year, $400 million revolving credit facility with a new $400 million revolving credit facility (the “Credit Facility”). The Credit Facility ends on June 11, 2023, at which point any remaining outstanding borrowings would be due for repayment unless extended by agreement of the parties for up to two additional one-year periods. In addition, under the terms of the Revolving Credit Agreement, Teradata from time to time and subject to certain conditions may increase the lending commitments under the Revolving Credit Agreement in an aggregate principal amount up to an additional $200 million , to the extent that existing or new lenders agree to provide such additional commitments. The outstanding principal amount of the Revolving Credit Agreement bears interest at a floating rate based upon, at Teradata’s option, a negotiated base rate or a Eurodollar rate plus, in each case, a margin based on Teradata’s leverage ratio. In the near term, Teradata would anticipate choosing a floating rate based on London Interbank Offered Rate (“LIBOR”). The Credit Facility is unsecured but is guaranteed by certain of Teradata’s material domestic subsidiaries and contains certain representations and warranties, conditions, affirmative, negative and financial covenants, and events of default customary for such facilities. As of December 31, 2018, the Company had no borrowings outstanding under the Credit Facility, leaving $400 million in additional borrowing capacity available under the Credit Facility. Unamortized deferred costs on the original credit facility and new lender fees of approximately $1 million were being amortized over the five -year term of the credit facility. The Company was in compliance with all covenants as of December 31, 2018. As of December 31, 2017, the Company had $240 million in borrowings outstanding under the previous five -year, $400 million revolving credit facility, which carried an interest rate of 5.0% . The Company was in compliance with all covenants as of December 31, 2017. Also, on June 11, 2018, Teradata closed on a new senior unsecured $500 million five -year term loan, the proceeds of which plus additional cash-on-hand were used to pay off the remaining $525 million of principal on its existing term loan. The $500 million term loan is payable in quarterly installments, which will commence on June 30, 2019 with 1.25% of the initial principal amount due on each of the first eight payment dates; 2.50% of the initial principal amount due on each of the next four payment dates; 5.0% of the initial principal amount due on each of the next three payment dates; and all remaining principal due on June 11, 2023. The outstanding principal amount under the term loan agreement bears interest at a floating rate based upon a negotiated base rate or a Eurodollar rate plus a margin based on the leverage ratio of the Company. As of December 31, 2018, the term loan principal outstanding was $500 million . As disclosed in Note 9, Teradata entered into an interest rate swap to hedge the floating interest rate of the Term Loan. Because of the swap, Teradata’s fixed rate on the term loan equals 2.86% plus the applicable leverage-based margin as defined in the Term Loan agreement. As of December 31, 2018, the all-in fixed rate is 4.36% . Unamortized deferred issuance costs of approximately $2 million were being amortized over the five-year term of the loan. The Company was in compliance with all covenants as of December 31, 2018. Prior to its repayment in the second quarter of 2018, Teradata had a $600 million term loan payable in quarterly installments, which commenced on March 31, 2016. As of December 31, 2017, the term loan principal outstanding was $540 million and carried an interest rate of 3.375% . Annual contractual maturities of outstanding principal on the term loan at December 31, 2018 , are as follows: In millions 2019 $ 19 2020 25 2021 44 2022 87 2023 325 Total $ 500 Teradata’s term loan is recognized on the Company’s balance sheet at its unpaid principal balance and is not subject to fair value measurement. However, given that the loan carries a variable rate, the Company estimates that the unpaid principal balance of the term loan would approximate its fair value. If measured at fair value in the financial statements, the Company’s term loan would be classified as Level 2 in the fair value hierarchy. During 2018, the Company entered into capital leases to finance certain of its equipment purchases. Assets acquired by capital leases during 2018 were $52 million . The lease term for all capital leases entered into during the year was 3 years and the average interest rate was 5.01% . The lease obligation as of December 31, 2018 was approximately $47 million . Future minimum lease payments under capital leases at December 31, 2018, were: In millions 2019 $ 19 2020 18 2021 13 Total 50 Amount representing interest (3 ) Present value of minimum lease payments $ 47 The following table presents interest expense on borrowings for the years ended December 31 : In millions 2018 2017 2016 Interest expense on term loan and credit facility $ 21 $ 15 $ 12 Interest expense on capital leases $ 1 $ — $ —

Segment, Other Supplemental Inf

Segment, Other Supplemental Information and Concentrations	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment, Other Supplemental Information and Concentrations	Segment, Other Supplemental Information and Concentrations Effective July 1, 2016, following the sale of the marketing applications business, Teradata is managing its business in two operating segments: (1) Americas region (North America and Latin America); and (2) International region (Europe, Middle East, Africa, Asia Pacific and Japan). For purposes of discussing results by segment, management excludes the impact of certain items, consistent with how management evaluates the performance of each segment. This format is useful to investors because it allows analysis and comparability of operating trends. It also includes the same information that is used by Teradata management to make decisions regarding the segments and to assess financial performance. The chief operating decision maker, who is our President and Chief Executive Officer, evaluates the performance of the segments based on revenue and multiple profit measures, including segment gross profit. For management reporting purposes assets are not allocated to the segments . The following table presents segment revenue and segment gross profit for the Company for the years ended December 31 : In millions 2018 2017 2016 Segment revenue Americas $ 1,126 $ 1,195 $ 1,334 International 1,038 961 919 Total Data and Analytics 2,164 2,156 2,253 Marketing Applications — — 69 Total revenue 2,164 2,156 2,322 Segment gross profit Americas 621 675 797 International 474 437 445 Total Data and Analytics 1,095 1,112 1,242 Marketing Application — — 34 Total segment gross profit 1,095 1,112 1,276 Stock-based compensation expense 15 13 14 Amortization of acquisition-related intangible assets — — 2 Acquisition, integration and reorganization-related costs 5 4 9 Amortization of capitalized software costs 49 71 62 Selling, general and administrative expenses 666 651 662 Research and development expenses 317 305 212 Impairment of goodwill, acquired intangibles and other assets — — 80 Total income from operations $ 43 $ 68 $ 235 Prior period segment information has been reclassified to conform to the current period presentation. Certain items, including amortization of certain capitalized software costs, were excluded from segment gross profit to conform to the way the Company manages and reviews the results by segment. The following table presents revenues by geographic area for the years ended December 31 : In millions 2018 2017 2016 United States $ 1,018 $ 1,089 $ 1,246 Americas (excluding United States) 108 107 123 International 1,038 960 953 Total revenue $ 2,164 $ 2,156 $ 2,322 The following table presents property and equipment, net by geographic area at December 31 : In millions 2018 2017 United States $ 226 $ 119 Americas (excluding United States) 18 11 International 51 32 Property and equipment, net $ 295 $ 162 Concentrations. No single customer accounts for more than 10% of the Company's revenue . As of December 31, 2018 , the Company is not aware of any significant concentration of business transacted with a particular customer that could, if suddenly eliminated, have a material adverse effect on the Company’s operations. The Company's hardware components are assembled exclusively by Flex. In addition, the Company utilizes preferred supplier relationships to better ensure more consistent quality, cost, and delivery. There can be no assurances that a disruption in production at Flex or at a supplier would not have a material adverse effect on the Company's operations. In addition, a significant change in the forecasts to any of these preferred suppliers could result in purchase obligations or components that may be in excess of demand. Changes in segment reporting. Subsequent to the year ended December 31, 2018 and effective January 1, 2019, the Company implemented an organizational change to its operating segments and will report future results under three separate segments: (1) the North America and Latin America ("Americas") region, (2) the Europe, Middle East and Africa ("EMEA") region, and (3) the Asia Pacific and Japan ("Asia Pacific") region, to align with the way the Company's management operates and reviews the results of these businesses.

Business Combinations and Other

Business Combinations and Other Investment Activities	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combinations and Other Investment Activities	Business Combinations and Other Investment Activities The Company did not have any acquisition activity in 2018. During 2017, the Company completed one immaterial business acquisition, which complements and strengthens the Company's research and development department, and released hold-back amounts from prior-year acquisitions for $21 million . During 2016 , the Company completed one immaterial business acquisition, which complements and strengthens the Company's global portfolio, and released hold-back amounts from several prior-year acquisitions for $16 million . The Company also sold the marketing applications business on July 1, 2016.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following table provides information on changes in accumulated other comprehensive income (loss), net of tax ("AOCI"), for the years ended December 31 : In millions Derivatives Defined benefit plans Foreign currency translation adjustments Total AOCI Balance as of December 31, 2015 $ — $ (29 ) $ (47 ) $ (76 ) Other comprehensive loss before reclassifications — (9 ) (7 ) (16 ) Amounts reclassified from AOCI — 3 — 3 Net other comprehensive loss — (6 ) (7 ) (13 ) Balance as of December 31, 2016 $ — $ (35 ) $ (54 ) $ (89 ) Other comprehensive (loss) income before reclassifications — (5 ) 16 11 Amounts reclassified from AOCI — 4 — 4 Net other comprehensive (loss) income — (1 ) 16 15 Balance as of December 31, 2017 $ — $ (36 ) $ (38 ) $ (74 ) Other comprehensive loss before reclassifications (6 ) (13 ) (13 ) (32 ) Amounts reclassified from AOCI — 5 — 5 Net other comprehensive loss (6 ) (8 ) (13 ) (27 ) Balance as of December 31, 2018 $ (6 ) $ (44 ) $ (51 ) $ (101 ) The following table presents the impact and respective location of AOCI reclassifications in the Consolidated Statements of Income for the years ended December 31: In millions AOCI Component Location 2018 2017 2016 Other Expense Other Expense (6 ) (5 ) (4 ) Tax portion Income tax benefit 1 1 1 Total reclassifications Net (loss) income $ (5 ) $ (4 ) $ (3 ) Further information on the Company’s defined benefit plans is included in Note 8.

Reorganization and Business Tra

Reorganization and Business Transformation	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Reorganization and Business Transformation	Reorganization and Business Transformation In 2015, the Company announced a plan to realign Teradata’s business by reducing its cost structure and focusing on the Company’s core data and analytics business. This business transformation included exiting the marketing applications business, rationalizing costs, and modifying the Company’s go-to-market approach. No costs were incurred related to this business transformation plan in 2018. Costs incurred were $26 million in 2017 and $129 million in 2016. On June 4, 2018, the Company approved a plan to consolidate certain of its operations, including transitioning its corporate headquarters to San Diego, California from its previous location in Dayton, Ohio. This plan, which is being executed in connection with Teradata’s comprehensive business transformation from a data warehouse company to a data analytics platform company, is intended to better align the Company’s skills and resources to effectively pursue opportunities in the marketplace. The Company expects that the costs relating to this consolidation plan will include employee separation benefits, transition support, and other exit-related costs. The employee separation benefit costs are being expensed over the time period that the employees have to work to earn them. The Company expects that it will incur costs and charges, which are substantially all cash expenditures, in the range of approximately $35 to $45 million related to the plan, consisting primarily of the following types of items: • $21 to $26 million for employee severance and other employee-related costs, • $6 to $8 million of accelerated depreciation for right-to-use assets under ASC 842, and • $8 to $11 million for outside service, legal and other associated costs. The Company incurred a portion of these costs and charges in 2018 and expects to incur the remainder in 2019, with the majority of the cash expenditures in 2019. The Company expects the actions related to the plan will be completed in 2019. Costs incurred for the plans listed above, are included in the table below: In millions 2018 2017 2016 Employee severance and other employee related cost $ — $ 2 $ 14 Asset write-downs — — 80 Professional services, legal and other associated cost — 24 35 Employee severance and other employee-related costs related to headquarter transition and business transformation 14 — — Transition support and other exit related costs for the headquarter transition and business transformation 9 — — Total reorganization and business transformation cost $ 23 $ 26 $ 129 Of the $23 million total costs in 2018, $11 million was paid out in cash and the remaining $12 million was accrued under other current liabilities at December 31, 2018. The majority of the costs were attributable to the Americas reporting unit and recorded as selling, general and administrative expenses with no impact on our segment gross profit. The charges for asset write-downs in 2016 were for non-cash write-downs of goodwill, acquired intangibles and other assets. In addition to the costs and charges incurred above, the Company made cash payments of less than $1 million in 2018 and 2017, and $20 million in 2016 related to the 2015 business transformation initiative for employee severance that did not have a material impact on its Statement of Operations due to Teradata accounting for its postemployment benefits under Accounting Standards Codification 712 , Compensation - Nonretirement Postemployment Benefits (“ASC 712”), which uses actuarial estimates and defers the immediate recognition of gains or losses.

Impairment and Sale of the Mark

Impairment and Sale of the Marketing Applications Business	12 Months Ended
	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Impairment and Sale of the Marketing Applications Business	Impairment and Sale of the Marketing Applications Business On April 22, 2016, the Company entered into a definitive Asset Purchase Agreement (the “Purchase Agreement”) with TMA Solutions, L.P., a Cayman Islands exempted limited partnership and affiliate of Marlin Equity Partners (“Marlin Equity”), to sell the marketing applications business for $90 million in cash, subject to a post-closing adjustment for working capital, debt and other metrics. We recognized an impairment of goodwill of $57 million and acquired intangibles of $19 million in the first quarter of 2016 to adjust the carrying value of the net assets of our marketing applications business to fair value less cost to sell. P rior to the sale that occurred on July 1, 2016, the marketing applications business was classified as held for sale and generated revenue of $69 million and an operating loss of $112 million (which includes loss from impairment of goodwill and acquired intangibles of $76 million ) for the six months ended June 30, 2016. O n July 1, 2016, pursuant to the Purchase Agreement, Teradata completed the sale of Teradata’s marketing applications business to Marlin Equity. The purchase price received for this business was approximately $92 million in cash, after a post-closing adjustment for working capital, debt and other metrics. Transaction costs and post-closing obligations were approximately $5 million . Upon completion of the divestiture of the held for sale assets in July 2016, no material gain or loss was recognized as the carrying value of the held for sale assets was equal to the purchase price received less costs to sell. The Company recorded tax expense of approximately $22 million in the third quarter of 2016 related to this transaction. The total tax expense, of which $14 million was cash taxes due to having zero tax basis in goodwill, was calculated based on the amount of proceeds allocated to the various jurisdictions in accordance with the Purchase Agreement at the local statutory rates.

Quarterly Information (unaudite

Quarterly Information (unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Information (unaudited)	Quarterly Information (unaudited) The following tables present certain unaudited quarterly financial information for fiscal 2018 and 2017. This supplemental quarterly financial information reflects all normal recurring adjustments, in the opinion of management, necessary to fairly state our results of operations for the periods presented when read in conjunction with the accompanying Consolidated Financial Statements and related Notes. In millions, except per share amounts March 31 June 30 September 30 December 31 (1) 2018 Total revenues $ 506 $ 544 $ 526 $ 588 Gross profit $ 223 $ 250 $ 264 $ 289 Operating (loss) income $ (4 ) $ 10 $ 14 $ 23 Net (loss) income $ (7 ) $ 4 $ 18 $ 15 Net (loss) income per share: Basic $ (0.06 ) $ 0.03 $ 0.15 $ 0.13 Diluted $ (0.06 ) $ 0.03 $ 0.15 $ 0.13 2017 Total revenues $ 491 $ 513 $ 526 $ 626 Gross profit $ 225 $ 242 $ 250 $ 307 Operating (loss) income $ — $ (1 ) $ 9 $ 60 Net (loss) income $ (2 ) $ (4 ) $ 13 $ (74 ) Net (loss) income per share: Basic $ (0.02 ) $ (0.03 ) $ 0.11 $ (0.61 ) Diluted $ (0.02 ) $ (0.03 ) $ 0.10 $ (0.61 ) (1) Loss from operations for the three months ended December 31, 2017 includes $126 million tax impact related to 2017 U.S. Tax Reform.

SCHEDULE II-VALUATION AND QUALI

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (In millions) Column A Column B Column C Column D Column E Description Balance at Beginning of Period Provision/reversals Charged to Costs & Expenses Charged to Other Accounts Deductions Balance at End of Period Allowance for doubtful accounts Year ended December 31, 2018 $ 12 $ 2 $ — $ — $ 14 Year ended December 31, 2017 $ 19 $ (6 ) $ — $ 1 $ 12 Year ended December 31, 2016* $ 22 $ 3 $ — $ 6 $ 19 Deferred tax valuation allowance Year ended December 31, 2018 $ 32 $ 7 $ — $ — $ 39 Year ended December 31, 2017 $ 26 $ 6 $ — $ — $ 32 Year ended December 31, 2016 $ 25 $ 1 $ — $ — $ 26 * Above amount included in the deductions within column D is $5 million of reserves transferred in the sale of the marketing application business.

Description of Business, Basi_2

Description of Business, Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Description of Business, Basis of Presentation and Significant Accounting Policies [Abstract]
Description of the Business	Description of the Business. Teradata Corporation ("we," "us," "Teradata," or the "Company") is a leading hybrid cloud analytics software provider focusing on delivering pervasive data intelligence to our customers, which we define as the ability to leverage 100% of a company’s data to uncover real-time intelligence, at scale. We help customers integrate and simplify their analytics ecosystem, access and manage data, and use analytics to extract answers and derive business value from data. Our solutions and services comprise software, hardware, and related business consulting and support services to deliver analytics across a company’s entire analytical ecosystem.
Basis of Presentation	Basis of Presentation. The financial statements are presented on a consolidated basis and include the accounts of the Company and its wholly-owned subsidiaries in accordance with accounting principles generally accepted in the United States of America (“GAAP”). During the first quarter of 2018, the Company changed its historical presentation of its revenue and cost of revenue categories. Previously, the Company presented revenue and cost of revenue on two lines: product and cloud, and services. As part of the Company’s business transformation, the Company is transitioning away from perpetual transactions to subscription-based transactions. To better reflect this shift in the business, the Company adopted a revised presentation in the first quarter of 2018, including the separation of recurring revenue from non-recurring product and consulting services. Recurring revenue consists of our on-premises and off-premises subscriptions, which have varying term lengths from one month to five years. Recurring revenue is intended to depict the revenue recognition model for these subscription transactions. The recurrence of these revenue streams in future periods depends on several factors, including contractual periods and customers' renewal decisions. Perpetual software licenses and hardware revenue consists of hardware, perpetual software licenses, and subscription/term licenses recognized upfront. Consulting services revenue consists of consulting, implementation and installation services. In connection with these revisions, the Company also revised its cost of revenue classification to present costs associated with the new revenue presentation. This change in presentation does not affect the Company’s total revenues, total cost of revenues or overall total gross profit (defined as total revenue less total cost of revenue). Prior period amounts have been restated to conform to the current year presentation, unless otherwise stated that the prior period amounts have not been restated.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and judgments that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and revenues and expenses during the period reported. On an ongoing basis, management evaluates these estimates and judgments, including those related to allowances for doubtful accounts, the valuation of inventory to net realizable value, impairments of goodwill and other intangibles, stock-based compensation, pension and other postemployment benefits, and income taxes and any changes will be accounted for on a prospective basis. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition under Topic 605 (periods prior to January 1, 2018) Teradata records revenue when it is realized, or realizable, and earned. Teradata considers these requirements met when: • Persuasive evidence of an arrangement exists • The offerings or services have been delivered to the customer • The sales price is fixed or determinable and free of contingencies or significant uncertainties • Collectibility is reasonably assured Teradata reports revenue net of any taxes assessed by governmental authorities that are imposed on and concurrent with specific revenue-producing transactions. The Company assesses whether fees are fixed or determinable at the time of sale. Standard payment terms may vary based on the country in which the agreement is executed, but are generally between 30 days and 90 days. Payments that are due within six months are generally deemed to be fixed or determinable based on a successful collection history on such arrangements, and thereby satisfy the required criteria for revenue recognition. The Company’s deliverables often involve delivery or performance at different periods of time. The Company's deliverables include the following: • Subscription license - revenue for these arrangements is typically recognized ratably over the contract term. • Cloud and service model - revenue for these arrangements are recognized outside the software rules and revenue is recognized ratably over the contract term. • Rentals - revenue for these arrangements is generally recognized straight-line over the term of the contract and are generally accounted for as operating leases. • Perpetual software and hardware - revenue is generally recognized upon delivery once title and risk of loss have been transferred. • Unspecified software upgrades - revenue is recognized straight-line over the term of the arrangement. • Maintenance support services - revenue is recognized on a straight-line basis over the term of the contract. • Consulting, implementation and installation services - revenue is recognized as services are provided. In certain instances, acceptance of the product or service is specified by the customer. In such cases, revenue is deferred until the acceptance criteria have been met. Delivery and acceptance generally occur in the same reporting period. For multiple deliverable arrangements that contain non-software related deliverables, the Company allocates revenue to each deliverable based upon the relative selling price hierarchy and if software and software-related deliverables are also included in the arrangement, to those deliverables as a group based on the best estimate of selling price (“BESP”) for the group. The selling price for a deliverable is based on its vendor-specific objective evidence of selling price (“VSOE”) if available, third-party evidence of selling price (“TPE”) if VSOE is not available, or BESP if neither VSOE nor TPE is available. The Company then recognizes revenue when the remaining revenue recognition criteria are met for each deliverable. For the software group or arrangements that contain only software and software-related deliverables, the revenue is allocated utilizing the residual or fair value method. Under the residual method, the VSOE of the undelivered elements is deferred and accounted for under the applicable revenue recognition guidance, and the remaining portion of the software arrangement fee is allocated to the delivered elements and is recognized as revenue. The fair value method is similar to the relative selling price method used for non-software deliverables except that the allocation of each deliverable is based on VSOE. VSOE is based upon the normal pricing and discounting practices for those offerings and services when sold separately. Teradata uses the stated renewal rate approach in establishing VSOE for maintenance and when-and-if-available software upgrades. Under this approach, the Company assesses whether the contractually stated renewal rates are substantive and consistent with the Company’s normal pricing practices. Renewal rates greater than the lower level of our targeted pricing ranges are substantive and, therefore, meet the requirements to support VSOE. In instances where there is not a substantive renewal rate in the arrangement, the Company allocates revenue based upon BESP, using the minimum established pricing targets as supported by the renewal rates for similar customers utilizing the bell-curve method. VSOE for consulting services is based on the hourly rates for standalone consulting services projects by geographic region and are indicative of the Company’s customary pricing practices. Pricing in each market is structured to obtain a reasonable margin based on input costs. The Company determines BESP for a product or service by considering multiple factors including, but not limited to, geographies, market conditions, product life cycles, competitive landscape, internal costs, gross margin objectives, purchase volumes and pricing practices. The primary consideration in developing BESP for the Company’s platforms is the bell-curve method based on historical transactions. The BESP analysis is at the geography level to align it with the way in which the Company goes to market and establishes pricing for its offerings. BESP is analyzed on a semi-annual basis using data from the four previous quarters, which the Company believes best reflects most recent pricing practices in a changing marketplace. Shipping and Handling. Product shipping and handling are included in cost in the Consolidated Statements of Income (Loss).
Cash and Cash Equivalents	Cash and Cash Equivalents. All short-term, highly-liquid investments having original maturities of three months or less are considered to be cash equivalents.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts. Teradata establishes provisions for doubtful accounts using both percentages of accounts receivable balances to reflect historical average credit losses and specific provisions for known issues.
Inventories	Inventories. Inventories are stated at the lower of cost or market. Cost of service parts is determined using the average cost method. Finished goods inventory is determined using actual cost.
Available-for-sale Securities	Available-for-sale Securities. Available-for-sale securities are reported at fair value. Unrealized holding gains and losses are excluded from earnings and reported in other comprehensive income (loss). Realized gains and losses are included in other income and expense in the Consolidated Statements of Income (Loss).
Long-Lived Assets	Long-Lived Assets Property and Equipment . Property and equipment, leasehold improvements and rental equipment are stated at cost less accumulated depreciation. Depreciation is computed over the estimated useful lives of the related assets primarily on a straight-line basis. Equipment is depreciated over 3 to 5 years and buildings over 25 to 45 years. Leasehold improvements are depreciated over the life of the lease or the asset, whichever is shorter. Total depreciation expense on the Company’s property and equipment for December 31 was as follows: In millions 2018 2017 2016 Depreciation expense $ 67 $ 55 $ 49
Capitalized Software	Capitalized Software . Direct development costs associated with internal-use software are capitalized and amortized over the estimated useful lives of the resulting software. The costs are capitalized when both the preliminary project stage is completed and it is probable that computer software being developed will be completed and placed in service. Teradata typically amortizes capitalized internal-use software on a straight-line basis over three years beginning when the asset is substantially ready for use. Costs incurred for the development of analytic applications are expensed as incurred based on the frequency and agile nature of development. Prior to 2017, costs incurred for the development of analytic database software that will be sold, leased or otherwise marketed were capitalized between technological feasibility and the point at which a product was ready for general release. Technological feasibility is established when planning, designing and initial coding activities that are necessary to establish the product can be produced to meet its design specifications are complete. In the absence of a program design, a working model is used to establish technological feasibility. These costs are included within capitalized software and are amortized over the estimated useful lives of four years using the greater of the ratio that current gross revenues for a product bear to the total of current and anticipated future gross revenues for that product or the straight-line method over the remaining estimated economic life of the product beginning when the product is available for general release. Costs capitalized include direct labor and related overhead costs. Costs incurred prior to technological feasibility and after general release are expensed as incurred. In 2016, our research and development efforts became more driven by market requirements and rapidly changing customers' needs. In addition, the Company started applying agile development methodologies to help respond to new technologies and trends. Agile development methodologies are characterized by a more dynamic development process with more frequent and iterative revisions to a product release features and functions as the software is being developed. Due to the shorter development cycle and focus on rapid production associated with agile development, the Company did not capitalize any amounts for external-use software development costs in 2018 and 2017 due to the relatively short duration between the completion of the working model and the point at which a product is ready for general release. Prior capitalized costs will continue to be amortized under the greater of revenue-based or straight-line method over the estimated useful life. The following table identifies the activity relating to capitalized software for the following periods: Internal-use Software External-use Software In millions 2018 2017 2016 2018 2017 2016 Beginning balance at January 1 $ 16 $ 13 $ 13 $ 105 $ 174 $ 177 Capitalized 6 9 6 — — 59 Amortization (7 ) (6 ) (6 ) (48 ) (69 ) (62 ) Ending balance at December 31 $ 15 $ 16 $ 13 $ 57 $ 105 $ 174 The aggregate amortization expense (actual and estimated) for internal-use and external-use software for the following periods is: Actual For the years ended (estimated) In millions 2018 2019 2020 2021 2022 2023 Internal-use software amortization expense $ 7 $ 6 $ 7 $ 7 $ 6 $ 6 External-use software amortization expense $ 48 $ 34 $ 23 $ — $ — $ — Estimated expense, which is recorded to cost of sales for external use software, is based on capitalized software at December 31, 2018 and does not include any new capitalization for future periods.
Valuation of Long-Lived Assets	Valuation of Long-Lived Assets. Long-lived assets such as property and equipment, acquired intangible assets and internal capitalized software are reviewed for impairment when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. An impairment is calculated based on the present value of future cash flows and an impairment loss would be recognized when estimated future undiscounted cash flows expected to result from the use of the asset and its eventual disposition are less than the carrying amount. No impairment was recognized during 2018.
Goodwill	Goodwill . Goodwill represents the excess of the purchase price in a business combination over the fair value of net tangible and intangible assets acquired. Goodwill amounts are not amortized, but rather are tested for impairment annually or upon occurrence of an event or change in circumstances that would more likely than not reduce the fair value of a reporting unit below its carrying amount. See Note 5 for additional information.
Warranty	Warranty. Provisions for product warranties are recorded in the period in which the related revenue is recognized. The Company accrues warranty reserves using percentages of revenue to reflect the Company’s historical average warranty claims.
Research and Development Costs	Research and Development Costs. Research and development costs are expensed as incurred (except for the capitalized software development costs discussed above). Research and development costs primarily include labor-related costs, contractor fees, and overhead expenses directly related to research and development support.
Pension and Postemployment Benefits	Pension and Postemployment Benefits. The Company accounts for its pension benefit and its non-U.S. postemployment benefit obligations using actuarial models. The measurement of plan obligations was made as of December 31, 2018 . Liabilities are computed using the projected unit credit method. The objective under this method is to expense each participant’s benefits under the plan as they accrue, taking into consideration salary increases and the plan’s benefit allocation formula. Thus, the total pension or postemployment benefit to which each participant is expected to become entitled is broken down into units, each associated with a year of past or future credited service. The Company recognizes the funded status of its pension and non-U.S. postemployment plan obligations in its consolidated balance sheet and records, in other comprehensive income, certain gains and losses that arise during the period, but are deferred under pension and postemployment accounting rules. See Note 8 for additional information.
Foreign Currency	Foreign Currency. Assets and liabilities of non-U.S. subsidiaries that operate in a local currency environment are translated into U.S. dollars at period-end exchange rates. Income and expense accounts are translated at daily exchange rates prevailing during the period. Adjustments arising from the translation are included in accumulated other comprehensive income, a separate component of stockholders’ equity. Gains and losses resulting from foreign currency transactions are included in determining net income.
Income Taxes	Income Taxes. Income tax expense is provided based on income before income taxes in the various jurisdictions in which the Company conducts its business. Deferred income taxes reflect the impact of temporary differences between assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes. These deferred taxes are determined based on the enacted tax rates expected to apply in the periods in which the deferred assets or liabilities are expected to be settled or realized. The Company made an accounting policy election in 2018 related to the Tax Act to provide for the tax expense related to global intangible low-taxed income (“GILTI”) in the year the tax is incurred. Teradata recognizes tax benefits from uncertain tax positions only if it is more likely than not the tax position will be sustained on examination by taxing authorities, based on the technical merits of the position. The Company records valuation allowances related to its deferred income tax assets when it is more likely than not that some portion or all the deferred income tax assets will not be realized. See Note 6 for additional information.
Stock-based Compensation	Stock-based Compensation. Stock-based payments to employees, including grants of stock options, restricted shares and restricted share units, are recognized in the financial statements based on their fair value. The fair value of each stock option award on the grant date is estimated using the Black-Scholes option-pricing model with the following assumptions: expected dividend yield, expected stock price volatility, weighted-average risk-free interest rate and weighted average expected term of the options. The Company’s expected volatility assumption used in the Black-Scholes option-pricing model is based on Teradata's historical volatility. The expected term for options granted is based upon historical observation of actual time elapsed between date of grant and exercise of options for all employees. The risk-free interest rate used in the Black-Scholes model is based on the implied yield curve available on U.S. Treasury issues at the date of grant with a remaining term equal to the Company’s expected term assumption. The Company has never declared or paid a cash dividend. See Note 7 for additional information.
Earnings (Loss) Per Share	Earnings (Loss) Per Share. Basic earnings (loss) per share is calculated by dividing net income (loss) by the weighted-average number of shares outstanding during the reported period. The calculation of diluted earnings per share is similar to basic earnings per share, except that the weighted-average number of shares outstanding includes the dilution from potential shares added from stock options, restricted share awards and other stock awards. Refer to Note 7 for share information on the Company’s stock compensation plans. The components of basic and diluted earnings (loss) per share for the years ended December 31 are as follows: In millions, except earnings (loss) per share 2018 2017 2016 Net income (loss) attributable to common stockholders $ 30 $ (67 ) $ 125 Weighted average outstanding shares of common stock 119.2 125.8 129.7 Dilutive effect of employee stock options, restricted shares and other stock awards 2.0 — 1.8 Common stock and common stock equivalents 121.2 125.8 131.5 Earnings (loss) per share: Basic $ 0.25 $ (0.53 ) $ 0.96 Diluted $ 0.25 $ (0.53 ) $ 0.95 For 2017, due to the net loss attributable to Teradata common stockholders, largely due to the tax expense recorded because of the Tax Cuts and Jobs Act of 2017, potential common shares that would cause dilution, such as employee stock options, restricted shares and other stock awards, have been excluded from the diluted share count because their effect would have been anti-dilutive. For 2017, the fully diluted shares would have been 127.8 million Options to purchase 2.6 million shares in 2018 , 2.7 million shares in 2017 and 5.2 million shares in 2016 of common stock, were not included in the computation of diluted earnings per share because their exercise prices were greater than the average market price of the common shares and, therefore, the effect would have been anti-dilutive.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Leases. In February 2016, the Financial Accounting Standards Board (FASB) issued new guidance under Topic 842, which requires a lessee to account for leases as finance or operating leases. Both types of leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability on its balance sheet, with differing methodology for income statement recognition. For lessors, the standard modifies the classification criteria and the accounting for sales-type and direct financing leases. Entities will classify leases to determine how to recognize lease-related revenue and expense. This standard is effective for public entities for fiscal years, and interim periods within those years, beginning after December 15, 2018, and early adoption is permitted. We anticipate adopting this standard on January 1, 2019 using the prospective adoption approach with a cumulative-effect adjustment recognized to the opening balance of retained earnings on the adoption date with prior periods not recast and anticipate electing certain of the practical expedients allowed under the standard. We are in the process of aggregating and evaluating lease arrangements, implementing new controls and processes, and implementing a lease accounting system. Based on a preliminary assessment, the Company expects that most of its operating lease commitments will be subject to the new guidance and recognized as operating lease liabilities and right-of-use assets upon adoption. The impact to the Company’s balance sheet is estimated to result in approximately 3 percent increase in assets and approximately 4 percent increase in liabilities. The impact on our results of operations and cash flows is not expected to be material. Comprehensive Income. In February 2018, the FASB issued new guidance for Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (ASU 2018-02), which allows companies to reclassify stranded tax effects resulting from the Tax Reform Act from accumulated other comprehensive income to retained earnings. The amendments are effective for all entities for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. The impact on our results of operations and cash flows is not expected to be material. Clarifying the Scope and the Accounting Guidance for Contributions Received and Contributions Made. In June 2018, the FASB issued new guidance to clarify and improve the scope and the accounting guidance for contributions received and contributions made. The amendments are intended to assist entities in evaluating whether transactions should be accounted for as contributions (nonreciprocal transactions) or as exchange (reciprocal) transactions and determining whether a contribution is conditional. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating this guidance to determine the impact it may have on its consolidated financial statements. Fair Value Measurement. In August 2018, the FASB issued new guidance that modifies disclosure requirements related to fair value measurement. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Implementation on a prospective or retrospective basis varies by specific disclosure requirement. Early adoption is permitted. The standard also allows for early adoption of any removed or modified disclosures upon issuance of this update while delaying adoption of the additional disclosures until their effective date. The Company is currently evaluating this guidance to determine the impact it may have on its disclosures. Compensation-Retirement Benefits-Defined Benefit Plans-General . In August 2018, the FASB issued new guidance that modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. For public companies, the amendments in this update are effective for fiscal years beginning after December 15, 2020, with early adoption permitted, and is to be applied on a retrospective basis to all periods presented. The Company is currently evaluating this guidance to determine the impact it may have on its disclosures. Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. In August 2018, the FASB issued new guidance that reduces complexity for the accounting for costs of implementing a cloud computing service arrangement and aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). For public companies, the amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. Implementation should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The effects of this standard on our financial position, results of operations or cash flows are not expected to be material.

Description of Business, Basi_3

Description of Business, Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Description of Business, Basis of Presentation and Significant Accounting Policies [Abstract]
Schedule Of Depreciation Expense	Total depreciation expense on the Company’s property and equipment for December 31 was as follows: In millions 2018 2017 2016 Depreciation expense $ 67 $ 55 $ 49
Schedule Of Activities Relating To Capitalized Software	The following table identifies the activity relating to capitalized software for the following periods: Internal-use Software External-use Software In millions 2018 2017 2016 2018 2017 2016 Beginning balance at January 1 $ 16 $ 13 $ 13 $ 105 $ 174 $ 177 Capitalized 6 9 6 — — 59 Amortization (7 ) (6 ) (6 ) (48 ) (69 ) (62 ) Ending balance at December 31 $ 15 $ 16 $ 13 $ 57 $ 105 $ 174
Aggregate Amortization Expense for Internal and External-Use Software	The aggregate amortization expense (actual and estimated) for internal-use and external-use software for the following periods is: Actual For the years ended (estimated) In millions 2018 2019 2020 2021 2022 2023 Internal-use software amortization expense $ 7 $ 6 $ 7 $ 7 $ 6 $ 6 External-use software amortization expense $ 48 $ 34 $ 23 $ — $ — $ —
Schedule Of Basic And Diluted Earnings Per Share	The components of basic and diluted earnings (loss) per share for the years ended December 31 are as follows: In millions, except earnings (loss) per share 2018 2017 2016 Net income (loss) attributable to common stockholders $ 30 $ (67 ) $ 125 Weighted average outstanding shares of common stock 119.2 125.8 129.7 Dilutive effect of employee stock options, restricted shares and other stock awards 2.0 — 1.8 Common stock and common stock equivalents 121.2 125.8 131.5 Earnings (loss) per share: Basic $ 0.25 $ (0.53 ) $ 0.96 Diluted $ 0.25 $ (0.53 ) $ 0.95

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Supplemental Financial Information	At December 31 In millions 2018 2017 Accounts receivable Trade $ 590 $ 559 Other 12 7 Accounts receivable, gross 602 566 Less: allowance for doubtful accounts (14 ) (12 ) Total accounts receivable, net $ 588 $ 554 Inventories Finished goods $ 16 $ 18 Service parts 12 12 Total inventories $ 28 $ 30 Property and equipment Land $ 8 $ 8 Buildings and improvements 84 82 Capital lease assets 52 — Machinery and other equipment 495 404 Property and equipment, gross 639 494 Less: accumulated depreciation (344 ) (332 ) Total property and equipment, net $ 295 $ 162 Other current liabilities Sales and value-added taxes $ 34 $ 30 Pension and other postemployment plan liabilities 10 9 Capital lease obligations - current portion 17 — Other 74 63 Total other current liabilities $ 135 $ 102 Deferred revenue Deferred revenue, current $ 490 $ 414 Long-term deferred revenue 105 85 Total deferred revenue $ 595 $ 499 Other long-term liabilities Transition tax $ 102 $ 133 Capital lease obligations 30 — Uncertain tax positions 17 14 Other 8 2 Total other long-term liabilities $ 157 $ 149

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents a disaggregation of revenue for the years ended December 31: In millions 2018 2017* 2016* Americas Recurring $ 801 $ 739 $ 703 Perpetual software licenses and hardware 127 234 369 Consulting services 198 222 262 Total Americas 1,126 1,195 1,334 International Recurring 453 406 368 Perpetual software licenses and hardware 213 195 231 Consulting services 372 360 320 Total International 1,038 961 919 Marketing applications — — 69 Total Revenue $ 2,164 $ 2,156 $ 2,322 *As noted above, prior period amounts have not been adjusted under the modified retrospective adoption method of Topic 606; however, as discussed in Note 1, prior period revenue captions have been reclassified to conform to the current year presentation.
Schedule of Receivables, Contract Assets, and Deferred Revenue from Contracts with Customers	The following table provides information about receivables, contract assets and deferred revenue from contracts with customers: In millions December 31, 2018 January 1, 2018 (as adjusted) Accounts receivable, net $ 588 $ 534 Contract assets $ 14 $ 20 Current deferred revenue $ 490 $ 395 Long-term deferred revenue $ 105 $ 85
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The following table includes estimated revenue expected to be recognized in the future related to the Company's unsatisfied (or partially satisfied) obligations at December 31, 2018: In millions Total at December 31, 2018 Year 1 Year 2 and Thereafter Remaining unsatisfied obligations $ 2,547 $ 1,200 $ 1,347

Contract Costs (Tables)

Contract Costs (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Activity Related to Capitalized Contract Costs	These costs are periodically reviewed for impairment. The following table identifies the activity relating to capitalized contract costs: In millions January 1, 2018 Capitalized Amortization December 31, 2018 Capitalized contract costs 17 44 (7 ) 54

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill by Operating Segment	The following table identifies the activity relating to goodwill by operating segment: In millions Balance at December 31, 2017 Additions Currency Balance at December 31, 2018 Goodwill Americas $ 253 $ — $ — $ 253 International 146 — (4 ) 142 Total goodwill $ 399 $ — $ (4 ) $ 395
Gross Carrying Amount and Accumulated Amortization for Teradata's Acquired Intangible Assets	The gross carrying amount and accumulated amortization for Teradata’s acquired intangible assets were as follows: December 31, 2018 December 31, 2017 In millions Amortization Life (in Years) Gross Carrying Amount Accumulated Amortization and Currency Translation Adjustments Gross Carrying Amount Accumulated Amortization and Currency Translation Adjustments Acquired intangible assets Intellectual property/developed technology 1 to 7 $ 35 $ (20 ) $ 43 $ (20 )
Aggregate Amortization Expense for Acquired Intangible Assets	The aggregate amortization expense (actual and estimated) for acquired intangible assets for the following periods is: Actual For the years ended (estimated) In millions 2016 2017 2018 2019 2020 2021 2022 Amortization expense $ 10 $ 8 $ 7 $ 5 $ 4 $ 4 $ 2

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Before Income Taxes	For the years ended December 31, income (loss) before income taxes consisted of the following: In millions 2018 2017 2016 Income (loss) before income taxes United States $ (79 ) $ (26 ) $ 93 Foreign 106 84 128 Total income before income taxes $ 27 $ 58 $ 221
Income Tax Expense	For the years ended December 31, income tax (benefit) expense consisted of the following: In millions 2018 2017 2016 Income tax (benefit) expense Current Federal $ (10 ) $ 132 $ 67 State and local 6 2 7 Foreign 19 25 25 Deferred Federal (20 ) (22 ) 7 State and local (4 ) (4 ) 1 Foreign 6 (8 ) (11 ) Total income tax (benefit) expense $ (3 ) $ 125 $ 96 Effective income tax rate (11.1 %) 215.5 % 43.4 %
The Difference Between the Effective Tax Rate and the U.S. Federal Statutory Income Tax Rate	The following table presents the principal components of the difference between the effective tax rate and the United States federal statutory income tax rate for the years ended December 31 : In millions 2018 2017 2016 Income tax expense at the U.S. federal tax rate 21.0 % 35.0 % 35.0 % Foreign income tax differential 2.1 % (22.6 )% (14.0 )% U.S. tax on foreign earnings 2.0 % 4.3 % 0.9 % State and local income taxes (25.0 )% (11.0 )% 0.2 % U.S. permanent book/tax differences (2.7 )% (1.5 )% 1.3 % U.S. research and development tax credits (29.5 )% (11.2 )% (1.6 )% Change in valuation allowance 27.7 % 10.0 % 0.8 % U.S. manufacturing deduction permanent difference — % (8.0 )% (3.5 )% Goodwill impairment — % — % 8.9 % Tax impact of sale of marketing applications business — % — % 9.9 % Tax impact of equity compensation (1.4 )% 0.7 % 2.4 % Tax impact of U.S. tax law change - IRC Section 987 — % — % 3.5 % Deferred tax impact from U.S. rate change from Tax Reform — % (27.0 )% — % Tax impact of U.S. Tax Reform/ Transition Tax (23.9 )% 250.0 % — % Tax Impact of uncertain tax positions 20.2 % (3.6 )% (0.6 )% Other, net (1.6 )% 0.4 % 0.2 % Effective income tax rate (11.1 )% 215.5 % 43.4 %
Deferred Income Tax Assets and Liabilities	Deferred income tax assets and liabilities included in the balance sheets at December 31 were as follows: In millions 2018 2017 Deferred income tax assets Employee pensions and other liabilities $ 49 $ 50 Other balance sheet reserves and allowances 18 13 Tax loss and credit carryforwards 63 59 Deferred revenue 20 3 Other — 2 Total deferred income tax assets 150 127 Valuation allowance (39 ) (32 ) Net deferred income tax assets 111 95 Deferred income tax liabilities Intangibles and capitalized software 17 30 Property and equipment 11 12 Other 19 — Total deferred income tax liabilities 47 42 Total net deferred income tax assets $ 64 $ 53
Liability Related to Uncertain Tax Positions	Below is a roll-forward of the Company’s liability related to uncertain tax positions at December 31 : In millions 2018 2017 Balance at January 1 $ 28 $ 30 Gross decreases for prior period tax positions — (1 ) Gross increases for prior period tax positions 3 — Gross increases for current period tax positions 8 3 Decreases due to the lapse of applicable statute of limitations (1 ) (4 ) Decreases relating to settlements with taxing authorities (4 ) — Balance at December 31 $ 34 $ 28

Employee Stock-based Compensa_2

Employee Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation Expense	The Company recorded stock-based compensation expense for the years ended December 31 as follows: In millions 2018 2017 2016 Stock options $ 6 $ 9 $ 9 Restricted shares 56 56 51 Employee share repurchase program 3 3 2 Total stock-based compensation before income taxes 65 68 62 Tax benefit (11 ) (21 ) (13 ) Total stock-based compensation, net of tax $ 54 $ 47 $ 49
Fair Value of Each Option Award on the Grant Date Using the Black-Scholes Option-Pricing Model	he fair value of each option award on the grant date was estimated using the Black-Scholes option-pricing model with the following assumptions: 2017 2016 Dividend yield — % — % Risk-free interest rate 1.99 % 2.08 % Expected volatility 35.0 % 35.2 % Expected term (years) 6.3 6.3
The Company's Stock Option Activity	The following table summarizes the Company’s stock option activity for the year ended December 31, 2018 : Shares in thousands Shares Under Option Weighted- Average Exercise Price per Share Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Outstanding at January 1, 2018 5,373 $ 37.63 4.5 $ 30 Granted — $ — Exercised (885 ) $ 23.69 Canceled (207 ) $ 47.79 Forfeited (133 ) $ 30.12 Outstanding at December 31, 2018 4,148 $ 40.34 3.8 $ 15 Fully vested and expected to vest at December 31, 2018 4,148 $ 40.34 3.8 $ 15 Exercisable at December 31, 2018 3,608 $ 42.05 3.2 $ 10
Total Intrinsic Value of Options Exercised and The Cash Received	The following table summarizes the total intrinsic value of options exercised and the cash received by the Company from option exercises under all share-based payment arrangements at December 31 : In millions 2018 2017 2016 Intrinsic value of options exercised $ 15 $ 6 $ 13 Cash received from option exercises $ 21 $ 19 $ 18 Tax benefit realized from option exercises $ 3 $ 2 $ 5
Restricted Stock and Restricted Stock Unit Activity	The following table reports restricted shares and restricted share unit activity during the year ended December 31, 2018 : Shares in thousands Number of Shares Weighted- Average Grant Date Fair Value per Share Unvested shares at January 1, 2018 4,226 $ 32.76 Granted 994 $ 37.98 Vested (1,636 ) $ 37.86 Forfeited/canceled (353 ) $ 34.44 Unvested shares at December 31, 2018 3,231 $ 34.27
Weighted-Average Fair Value and Total Fair Value of Shares Vested	The following table summarizes the weighted-average fair value of restricted share units granted for Teradata equity awards and the total fair value of shares vested. 2018 2017 2016 Weighted-average fair value of restricted share units granted $ 37.98 $ 34.88 $ 26.61 Total fair value of shares vested (in millions) $ 53 $ 50 $ 61
The Composition of Teradata Restricted Stock Grants	The following table represents the composition of Teradata restricted share unit grants in 2018 : Shares in thousands Number of Shares Weighted- Average Grant Date Fair Value Service-based shares 482 $ 39.32 Performance-based shares 512 $ 36.62 Total stock grants 994 $ 37.98
Employee Purchases and Aggregate Cost	Employee purchases and aggregate cost were as follows at December 31 : In millions 2018 2017 2016 Employee share purchases 0.5 0.6 0.6 Aggregate cost $ 17 $ 15 $ 13

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Pension and Postemployment Benefit Costs	Pension and postemployment benefit costs for the years ended December 31 were as follows: 2018 2017 2016 In millions Pension Postemployment Pension Postemployment Pension Postemployment Service cost $ 8 $ 8 $ 9 $ 7 $ 8 $ 6 Interest cost 3 1 3 1 3 1 Expected return on plan assets (2 ) — (2 ) — (2 ) — Settlement charge — — — — 1 — Curtailment charge (1 ) — — — — — Amortization of actuarial loss 1 4 1 2 1 1 Amortization of prior service (credit) cost — — (1 ) 1 — 2 Divestiture — — — — (2 ) (1 ) Total costs $ 9 $ 13 $ 10 $ 11 $ 9 $ 9
Accumulated Pension Benefit Obligation	The following tables present the changes in benefit obligations, plan assets, funded status and the reconciliation of the funded status to amounts recognized in the consolidated balance sheets and in accumulated other comprehensive income at December 31 : Pension Postemployment In millions 2018 2017 2018 2017 Change in benefit obligation Benefit obligation at January 1 $ 136 $ 120 $ 47 $ 42 Service cost 8 9 8 7 Interest cost 3 3 1 1 Plan participant contributions 1 1 — — Actuarial (gain) loss (5 ) (3 ) 12 12 Benefits paid (2 ) (4 ) (14 ) (15 ) Curtailment (1 ) — — — Settlement (4 ) — — — Currency translation adjustments (4 ) 10 — — Benefit obligation at December 31 $ 132 $ 136 $ 54 $ 47 Change in plan assets Fair value of plan assets at January 1 $ 75 $ 64 $ — $ — Actual return on plan assets (2 ) 5 — — Company contributions 5 5 — — Benefits paid (2 ) (4 ) — — Currency translation adjustments (1 ) 4 — — Plan participant contribution 1 1 — — Settlements (4 ) — — — Other (4 ) — — — Fair value of plan assets at December 31 68 75 — — Funded status (underfunded) $ (64 ) $ (61 ) $ (54 ) $ (47 ) Amounts Recognized in the Consolidated Balance Sheet Non-current assets $ 5 $ 10 $ — $ — Current liabilities (1 ) (2 ) (9 ) (7 ) Non-current liabilities (68 ) (69 ) (45 ) (40 ) Net amounts recognized $ (64 ) $ (61 ) $ (54 ) $ (47 ) Amounts Recognized in Accumulated Other Comprehensive Income (Loss) Unrecognized Net actuarial loss $ 16 $ 15 $ 44 $ 37 Unrecognized Prior service (credit) cost — (1 ) 3 3 Total $ 16 $ 14 $ 47 $ 40 The following table presents pension plans with accumulated benefit obligations in excess of plan assets at December 31 : In millions 2018 2017 Projected benefit obligation $ 68 $ 69 Accumulated benefit obligation $ 61 $ 63 Fair value of plan assets $ — $ — The following table presents the accumulated pension benefit obligation at December 31 : In millions 2018 2017 Accumulated pension benefit obligation $ 122 $ 125
Pre-Tax Net Changes in Projected Benefit Obligations Recognized in Other Comprehensive Income	The following table presents the pre-tax net changes in projected benefit obligations recognized in other comprehensive income: Pension Postemployment In millions 2018 2017 2018 2017 Actuarial (gain) loss arising during the year $ (2 ) $ (7 ) $ 12 $ 13 Amortization of loss included in net periodic benefit cost (1 ) (1 ) (4 ) (2 ) Prior service (credit) cost arising during the year — — — (1 ) Recognition of gain due to curtailment 1 — — — Foreign currency exchange (1 ) 2 — — Total recognized in other comprehensive (loss) income $ (3 ) $ (6 ) $ 8 $ 10
Amounts in Accumulated Other Comprehensive Income Expected to be Recognized as Components of Net Periodic Benefit Cost	The following table presents the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost during 2019 : In millions Pension Postemployment Net loss to be recognized in other comprehensive income $ 1 $ 5
Weighted-Average Rates and Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit	The weighted-average rates and assumptions used to determine benefit obligations at December 31, and net periodic benefit cost for the years ended December 31, were as follows: Pension Benefit Obligations Pension Benefit Cost 2018 2017 2018 2017 2016 Discount rate 2.2% 2.1% 2.1% 2.0% 2.4% Rate of compensation increase 3.4% 3.3% 3.3% 3.3% 3.2% Expected return on plan assets N/A N/A 2.8% 2.9% 3.0% Postemployment Benefit Obligations Postemployment Benefit Cost 2018 2017 2018 2017 2016 Discount rate 2.5% 2.6% 2.5% 2.6% 3.4% Rate of compensation increase 3.0% 3.0% 3.0% 3.0% 3.0% Involuntary turnover rate 2.5% 2.3% 2.5% 2.3% 2.0%
Weighted-Average Asset Allocations, by Category	The weighted-average asset allocations at December 31, by asset category are as follows: Actual Asset Allocation as of December 31 Target Asset 2018 2017 Allocation Equity securities 32% 32% 32% Debt securities 51% 41% 50% Insurance (annuity) contracts 12% 17% 12% Real-estate 3% 8% 3% Other 2% 2% 3% Total 100% 100% 100%
Pension Plan Assets at Fair Value	The following table sets forth by level, within the fair value hierarchy, the pension plan assets at fair value as of December 31, 2017 : Fair Value Measurements at Reporting Date Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs In millions December 31, 2017 (Level 1) (Level 2) (Level 3) Money market funds $ 2 $ — $ 2 $ — Equity funds 24 — 24 — Bond/fixed-income funds 31 — 31 — Real-estate indirect investments 6 — 6 — Insurance contracts 12 — — 12 Total assets at fair value $ 75 $ — $ 63 $ 12 The following table sets forth by level, within the fair value hierarchy, the pension plan assets at fair value as of December 31, 2018 : Fair Value Measurements at Reporting Date Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs In millions December 31, 2018 (Level 1) (Level 2) (Level 3) Money market funds $ 1 $ — $ 1 $ — Equity funds 22 — 22 — Bond/fixed-income funds 35 — 35 — Real-estate indirect investments 2 — 2 — Insurance contracts 8 — — 8 Total assets at fair value $ 68 $ — $ 60 $ 8
Changes in Fair Value of the Pension Plan Level 3 Assets	The table below sets forth a summary of changes in the fair value of the pension plan level 3 assets for the year ended December 31, 2018 : In millions Insurance Contracts Balance as of January 1, 2018 $ 12 Purchases, sales and settlements, net (4 ) Balance as of December 31, 2018 $ 8 The table below sets forth a summary of changes in the fair value of the pension plan level 3 assets for the year ended December 31, 2017 : In millions Insurance Contracts Balance as of January 1, 2017 $ 11 Purchases, sales and settlements, net 1 December 31, 2017 $ 12
Estimated Future Benefit Payments	The Company expects to make the following benefit payments, estimated based on the assumptions used to measure the company's benefit obligation at the end of the year, reflecting past and future service from its pension and postemployment plans: Pension Postemployment In millions Benefits Benefits Year 2019 $ 3 $ 9 2020 $ 4 $ 9 2021 $ 5 $ 9 2022 $ 5 $ 9 2023 $ 5 $ 9 2024 - 2028 $ 31 $ 44
U.S and International Subsidiary Savings Plans	The following table identifies the expense for the United States and International subsidiary savings plans for the years ended December 31 : In millions 2018 2017 2016 U.S. savings plan $ 22 $ 21 $ 19 International subsidiary savings plans $ 17 $ 17 $ 16

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Foreign Exchange Contracts	The following table identifies the contract notional amount of the Company’s hedging instruments at December 31 : In millions 2018 2017 Contract notional amount of foreign exchange forward contracts $ 256 $ 147 Net contract notional amount of foreign exchange forward contracts $ 35 $ 23 Contract notional amount of interest rate swap $ 500 $ —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Warranty Reserve Activity	The following table identifies the activity relating to the warranty reserve liability for the years ended December 31 : In millions 2018 2017 2016 Beginning balance at January 1 $ 4 $ 5 $ 6 Accruals for warranties issued 5 6 8 Settlements (in cash or kind) (6 ) (7 ) (9 ) Balance at end of period $ 3 $ 4 $ 5
Committed Operating Leases Less Sublease Rentals	Future minimum operating lease payments and committed subleases under non-cancelable leases as of December 31, 2018 , for the following fiscal years were: In millions Total Amounts 2019 2020 2021 2022 2022 and Thereafter Operating lease obligations $ 73 $ 24 $ 20 $ 12 $ 11 $ 6 Sublease rentals (10 ) (6 ) (4 ) — — — Total committed operating leases less sublease rentals $ 63 $ 18 $ 16 $ 12 $ 11 $ 6 The following table represents the Company’s actual rental expense and sublease rental income for the years ended December 31 : In millions 2018 2017 2016 Rental expense $ 24 $ 24 $ 24 Sublease rental income $ 6 $ 5 $ 3

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis and Subject to Fair Value Disclosure Requirements	The Company’s assets and liabilities measured at fair value on a recurring basis and subject to fair value disclosure requirements at December 31, 2018 and December 31, 2017 were as follows: Fair Value Measurements at Reporting Date Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs In millions Total (Level 1) (Level 2) (Level 3) Assets Money market funds at December 31, 2018 $ 246 $ 246 $ — $ — Money market funds at December 31, 2017 $ 501 $ 501 $ — $ — Liabilities Interest rate swap at December 31, 2018 $ 7 $ — $ 7 $ —

Debt and Capital Leases (Tables

Debt and Capital Leases (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Annual Contractual Maturities of Principal on Debt Outstanding	Annual contractual maturities of outstanding principal on the term loan at December 31, 2018 , are as follows: In millions 2019 $ 19 2020 25 2021 44 2022 87 2023 325 Total $ 500
Interest Expense on Borrowings	The following table presents interest expense on borrowings for the years ended December 31 : In millions 2018 2017 2016 Interest expense on term loan and credit facility $ 21 $ 15 $ 12 Interest expense on capital leases $ 1 $ — $ —
Schedule of Future Minimum Lease Payments for Capital Leases	Future minimum lease payments under capital leases at December 31, 2018, were: In millions 2019 $ 19 2020 18 2021 13 Total 50 Amount representing interest (3 ) Present value of minimum lease payments $ 47

Segment, Other Supplemental I_2

Segment, Other Supplemental Information and Concentrations (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Regional Segment Revenue and Segment Gross Profit	The following table presents segment revenue and segment gross profit for the Company for the years ended December 31 : In millions 2018 2017 2016 Segment revenue Americas $ 1,126 $ 1,195 $ 1,334 International 1,038 961 919 Total Data and Analytics 2,164 2,156 2,253 Marketing Applications — — 69 Total revenue 2,164 2,156 2,322 Segment gross profit Americas 621 675 797 International 474 437 445 Total Data and Analytics 1,095 1,112 1,242 Marketing Application — — 34 Total segment gross profit 1,095 1,112 1,276 Stock-based compensation expense 15 13 14 Amortization of acquisition-related intangible assets — — 2 Acquisition, integration and reorganization-related costs 5 4 9 Amortization of capitalized software costs 49 71 62 Selling, general and administrative expenses 666 651 662 Research and development expenses 317 305 212 Impairment of goodwill, acquired intangibles and other assets — — 80 Total income from operations $ 43 $ 68 $ 235
Revenue from External Customers by Geographic Areas	The following table presents revenues by geographic area for the years ended December 31 : In millions 2018 2017 2016 United States $ 1,018 $ 1,089 $ 1,246 Americas (excluding United States) 108 107 123 International 1,038 960 953 Total revenue $ 2,164 $ 2,156 $ 2,322
Property and Equipment by Geographic Area	The following table presents property and equipment, net by geographic area at December 31 : In millions 2018 2017 United States $ 226 $ 119 Americas (excluding United States) 18 11 International 51 32 Property and equipment, net $ 295 $ 162

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (AOCI), Net of Tax	The following table provides information on changes in accumulated other comprehensive income (loss), net of tax ("AOCI"), for the years ended December 31 : In millions Derivatives Defined benefit plans Foreign currency translation adjustments Total AOCI Balance as of December 31, 2015 $ — $ (29 ) $ (47 ) $ (76 ) Other comprehensive loss before reclassifications — (9 ) (7 ) (16 ) Amounts reclassified from AOCI — 3 — 3 Net other comprehensive loss — (6 ) (7 ) (13 ) Balance as of December 31, 2016 $ — $ (35 ) $ (54 ) $ (89 ) Other comprehensive (loss) income before reclassifications — (5 ) 16 11 Amounts reclassified from AOCI — 4 — 4 Net other comprehensive (loss) income — (1 ) 16 15 Balance as of December 31, 2017 $ — $ (36 ) $ (38 ) $ (74 ) Other comprehensive loss before reclassifications (6 ) (13 ) (13 ) (32 ) Amounts reclassified from AOCI — 5 — 5 Net other comprehensive loss (6 ) (8 ) (13 ) (27 ) Balance as of December 31, 2018 $ (6 ) $ (44 ) $ (51 ) $ (101 )
Impact and Respective Location of AOCI Reclassifications in Consolidated Statements of Income	The following table presents the impact and respective location of AOCI reclassifications in the Consolidated Statements of Income for the years ended December 31: In millions AOCI Component Location 2018 2017 2016 Other Expense Other Expense (6 ) (5 ) (4 ) Tax portion Income tax benefit 1 1 1 Total reclassifications Net (loss) income $ (5 ) $ (4 ) $ (3 )

Reorganization and Business T_2

Reorganization and Business Transformation (Tables)	12 Months Ended
	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	: In millions 2018 2017 2016 Employee severance and other employee related cost $ — $ 2 $ 14 Asset write-downs — — 80 Professional services, legal and other associated cost — 24 35 Employee severance and other employee-related costs related to headquarter transition and business transformation 14 — — Transition support and other exit related costs for the headquarter transition and business transformation 9 — — Total reorganization and business transformation cost $ 23 $ 26 $ 129

Quarterly Information (unaudi_2

Quarterly Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations	In millions, except per share amounts March 31 June 30 September 30 December 31 (1) 2018 Total revenues $ 506 $ 544 $ 526 $ 588 Gross profit $ 223 $ 250 $ 264 $ 289 Operating (loss) income $ (4 ) $ 10 $ 14 $ 23 Net (loss) income $ (7 ) $ 4 $ 18 $ 15 Net (loss) income per share: Basic $ (0.06 ) $ 0.03 $ 0.15 $ 0.13 Diluted $ (0.06 ) $ 0.03 $ 0.15 $ 0.13 2017 Total revenues $ 491 $ 513 $ 526 $ 626 Gross profit $ 225 $ 242 $ 250 $ 307 Operating (loss) income $ — $ (1 ) $ 9 $ 60 Net (loss) income $ (2 ) $ (4 ) $ 13 $ (74 ) Net (loss) income per share: Basic $ (0.02 ) $ (0.03 ) $ 0.11 $ (0.61 ) Diluted $ (0.02 ) $ (0.03 ) $ 0.10 $ (0.61 ) (1) Loss from operations for the three months ended December 31, 2017 includes $126 million tax impact related to 2017 U.S. Tax Reform.

Description of Business, Basi_4

Description of Business, Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) shares in Millions

3 Months Ended

12 Months Ended

Dec. 31, 2018USD ($)

Sep. 30, 2018USD ($)

Jun. 30, 2018USD ($)

Mar. 31, 2018USD ($)

Dec. 31, 2017USD ($)

Sep. 30, 2017USD ($)

Jun. 30, 2017USD ($)

Mar. 31, 2017USD ($)

Dec. 31, 2018USD ($)shares

Dec. 31, 2017USD ($)shares

Dec. 31, 2016USD ($)shares

Jan. 01, 2019

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Depreciation

$ 67,000,000

$ 55,000,000

$ 49,000,000

Antidilutive options to purchase were excluded from computation of diluted earnings per share (in shares) | shares

127.8

Operating (loss) income

$ 23,000,000

$ 14,000,000

$ 10,000,000

$ (4,000,000)

$ 60,000,000

$ 9,000,000

$ (1,000,000)

$ 0

43,000,000

$ 68,000,000

235,000,000

Impairment of long-lived assets

0

Other expenses

$ 8,000,000

$ 6,000,000

$ 8,000,000

Internal-Use Software

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Period capitalized on a straight-line basis when the asset is substantially ready for use

3 years

Capitalized Software

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Intangible assets amortizable period

4 years

Minimum

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Fees payment term (in days)

30 days

Maximum

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Fees payment term (in days)

90 days

Equipment | Minimum

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Estimated useful lives (in years)

3 years

Equipment | Maximum

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Estimated useful lives (in years)

5 years

Building | Minimum

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Estimated useful lives (in years)

25 years

Building | Maximum

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Estimated useful lives (in years)

45 years

Employee Stock Option

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Antidilutive options to purchase were excluded from computation of diluted earnings per share (in shares) | shares

2.6

2.7

5.2

New Accounting Pronouncement, Early Adoption, Effect

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Other income

$ (4,000,000)

$ (3,000,000)

Accounting Standards Update 2017-07

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Operating (loss) income

6,000,000

4,000,000

$ 3,000,000

Other expenses

$ 6,000,000

$ 4,000,000

$ 3,000,000

Subsequent Event | Accounting Standards Update 2016-02

Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]

Assets, estimated percentage increase

0.03

Liabilities, estimated percentage increase

0.04

Description of Business, Basi_5

Description of Business, Basis of Presentation and Significant Accounting Policies - Activities Relating to Capitalized Software (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Movement in Capitalized Computer Software, Net [Roll Forward]
Beginning balance at January 1	$ 121
Amortization	(49)	$ (71)	$ (62)
Ending balance at December 31	72	121
Internal-Use Software
Movement in Capitalized Computer Software, Net [Roll Forward]
Beginning balance at January 1	16	13	13
Capitalized	6	9	6
Amortization	(7)	(6)	(6)
Ending balance at December 31	15	16	13
External-Use Software
Movement in Capitalized Computer Software, Net [Roll Forward]
Beginning balance at January 1	105	174	177
Capitalized	0	0	59
Amortization	(48)	(69)	(62)
Ending balance at December 31	$ 57	$ 105	$ 174

Description of Business, Basi_6

Description of Business, Basis of Presentation and Significant Accounting Policies - Aggregate Amortization Expense for Internal and External-Use Software (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Acquired Intangible Assets Amortization [Line Items]
Actual 2,018	$ 7	$ 8	$ 10
2,019	5
2,020	4
2,021	4
2,022	2
Internal-use software amortization expense
Acquired Intangible Assets Amortization [Line Items]
Actual 2,018	7
2,019	6
2,020	7
2,021	7
2,022	6
2,023	6
External-use software amortization expense
Acquired Intangible Assets Amortization [Line Items]
Actual 2,018	48
2,019	34
2,020	23
2,021	0
2,022	0
2,023	$ 0

Description of Business, Basi_7

Description of Business, Basis of Presentation and Significant Accounting Policies - Components of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Description of Business, Basis of Presentation and Significant Accounting Policies [Abstract]
Net income (loss) attributable to common stockholders	$ 15	$ 18	$ 4	$ (7)	$ (74)	$ 13	$ (4)	$ (2)	$ 30	$ (67)	$ 125
Weighted average outstanding shares of common stock									119.2	125.8	129.7
Dilutive effect of employee stock options, restricted shares and other stock awards									2	0	1.8
Common stock and common stock equivalents									121.2	125.8	131.5
Earnings (loss) per share:
Basic (in usd per share)	$ 0.13	$ 0.15	$ 0.03	$ (0.06)	$ (0.61)	$ 0.11	$ (0.03)	$ (0.02)	$ 0.25	$ (0.53)	$ 0.96
Diluted (in usd per share)	$ 0.13	$ 0.15	$ 0.03	$ (0.06)	$ (0.61)	$ 0.10	$ (0.03)	$ (0.02)	$ 0.25	$ (0.53)	$ 0.95

Supplemental Financial Inform_3

Supplemental Financial Information (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Accounts receivable
Trade	$ 590		$ 559
Other	12		7
Accounts receivable, gross	602		566
Less: allowance for doubtful accounts	(14)		(12)
Total accounts receivable, net	588	$ 534	554
Inventories
Finished goods	16		18
Service parts	12		12
Total inventories	28		30
Property and equipment
Land	8		8
Buildings and improvements	84		82
Capital lease assets	52		0
Machinery and other equipment	495		404
Property and equipment, gross	639		494
Less: accumulated depreciation	(344)		(332)
Total property and equipment, net	295		162
Other current liabilities
Sales and value-added taxes	34		30
Pension and other postemployment plan liabilities	10		9
Capital lease obligations - current portion	17		0
Other	74		63
Total other current liabilities	135		102
Deferred revenue
Deferred revenue, current	490	395	414
Long-term deferred revenue	105	$ 85	85
Total deferred revenue	595		499
Other long-term liabilities
Transition tax	102		133
Capital lease obligations	30		0
Uncertain tax positions	17		14
Other	8		2
Total other long-term liabilities	$ 157		$ 149

Revenue from Contracts with C_2

Revenue from Contracts with Customers - Disaggregation of Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue	$ 588	$ 526	$ 544	$ 506	$ 626	$ 526	$ 513	$ 491	$ 2,164	$ 2,156	$ 2,322
Americas
Disaggregation of Revenue [Line Items]
Revenue									1,126
International
Disaggregation of Revenue [Line Items]
Revenue									1,038	960	953
Recurring
Disaggregation of Revenue [Line Items]
Revenue									1,254	1,145	1,135
Recurring | Americas
Disaggregation of Revenue [Line Items]
Revenue									801
Recurring | International
Disaggregation of Revenue [Line Items]
Revenue									453
Hardware
Disaggregation of Revenue [Line Items]
Revenue									32	17	7
Perpetual software licenses and hardware
Disaggregation of Revenue [Line Items]
Revenue									340	429	600
Perpetual software licenses and hardware | Americas
Disaggregation of Revenue [Line Items]
Revenue									127
Perpetual software licenses and hardware | International
Disaggregation of Revenue [Line Items]
Revenue									213
Consulting services
Disaggregation of Revenue [Line Items]
Revenue									570	582	587
Consulting services | Americas
Disaggregation of Revenue [Line Items]
Revenue									198
Consulting services | International
Disaggregation of Revenue [Line Items]
Revenue									372
Marketing Applications
Disaggregation of Revenue [Line Items]
Revenue									$ 0
Calculated under Revenue Guidance in Effect before Topic 606
Disaggregation of Revenue [Line Items]
Revenue										2,156	2,322
Calculated under Revenue Guidance in Effect before Topic 606 | Americas
Disaggregation of Revenue [Line Items]
Revenue										1,195	1,334
Calculated under Revenue Guidance in Effect before Topic 606 | International
Disaggregation of Revenue [Line Items]
Revenue										961	919
Calculated under Revenue Guidance in Effect before Topic 606 | Recurring | Americas
Disaggregation of Revenue [Line Items]
Revenue										739	703
Calculated under Revenue Guidance in Effect before Topic 606 | Recurring | International
Disaggregation of Revenue [Line Items]
Revenue										406	368
Calculated under Revenue Guidance in Effect before Topic 606 | Perpetual software licenses and hardware | Americas
Disaggregation of Revenue [Line Items]
Revenue										234	369
Calculated under Revenue Guidance in Effect before Topic 606 | Perpetual software licenses and hardware | International
Disaggregation of Revenue [Line Items]
Revenue										195	231
Calculated under Revenue Guidance in Effect before Topic 606 | Consulting services | Americas
Disaggregation of Revenue [Line Items]
Revenue										222	262
Calculated under Revenue Guidance in Effect before Topic 606 | Consulting services | International
Disaggregation of Revenue [Line Items]
Revenue										360	320
Calculated under Revenue Guidance in Effect before Topic 606 | Marketing Applications
Disaggregation of Revenue [Line Items]
Revenue										$ 0	$ 69

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Contract Receivables, Assets, and Current Deferred Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 588	$ 534	$ 554
Contract assets	14	20
Deferred revenue, current	490	395	414
Long-term deferred revenue	105	$ 85	$ 85
Revenue recognized from amounts included in deferred revenue	$ 384

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Transaction Price Allocated to Unsatisfied Obligations (Details) $ in Millions	Dec. 31, 2018USD ($)
Revenue from Contract with Customer [Abstract]
Remaining unsatisfied obligations	$ 2,547
Amount of of customer only general cancellation	1,468
Amount of non-cancelable contracts	729
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue from Contract with Customer [Abstract]
Remaining unsatisfied obligations	$ 1,200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Remaining unsatisfied obligations	$ 1,347
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction, period

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Impacts on Financial Statements (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 01, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit		$ (823)				$ (579)				$ (823)	$ (579)
Increase in other assets		54				17				54	17
Tax impact										(3)	125	$ 96
Selling, general and administrative expenses										666	651	662
Net income (loss)		$ 15	$ 18	$ 4	$ (7)	$ (74)	$ 13	$ (4)	$ (2)	$ 30	$ (67)	$ 125
Basic (in usd per share)		$ 0.13	$ 0.15	$ 0.03	$ (0.06)	$ (0.61)	$ 0.11	$ (0.03)	$ (0.02)	$ 0.25	$ (0.53)	$ 0.96
Assets		$ 2,360				$ 2,556				$ 2,360	$ 2,556
Contract with customer, deferred costs		595				499				595	499
Liabilities		1,865				$ 1,888				1,865	$ 1,888
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit	$ 19
Increase in other assets	17	54								54
Tax impact	10
Unbilled contract receivables	20
Revenues										15
Selling, general and administrative expenses										37
Net income (loss)										$ 33
Basic (in usd per share)										$ 0.27
Assets		43								$ 43
Contract with customer, deferred costs		11								11
Liabilities		$ 16								$ 16
Deferred Tax Liability | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit	$ 26

Contract Costs (Details)

Contract Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Capitalized Contract Cost, Net [Roll Forward]
Capitalized contract costs, beginning balance	$ 17
Capitalized	44
Amortization	(7)
Capitalized contract costs, ending balance	$ 54

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets - Goodwill by Operating Segment (Detail)	3 Months Ended		12 Months Ended
	Dec. 31, 2018USD ($)reporting_unit	Mar. 31, 2016USD ($)	Dec. 31, 2018USD ($)
Goodwill
Balance at December 31, 2017			$ 399,000,000
Additions			0
Currency Translation Adjustments			(4,000,000)
Balance at December 31, 2018	$ 395,000,000		395,000,000
Impairment of goodwill and acquired intangibles	$ 0	$ 57,000,000
Number of reporting units | reporting_unit	2
Americas
Goodwill
Balance at December 31, 2017			253,000,000
Additions			0
Currency Translation Adjustments			0
Balance at December 31, 2018	$ 253,000,000		253,000,000
International
Goodwill
Balance at December 31, 2017			146,000,000
Additions			0
Currency Translation Adjustments			(4,000,000)
Balance at December 31, 2018	$ 142,000,000		$ 142,000,000

Goodwill and Acquired Intangi_4

Goodwill and Acquired Intangible Assets - Gross Carrying Amount and Accumulated Amortization (Detail) - Intellectual property/developed technology - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets
Gross Carrying Amount	$ 35	$ 43
Accumulated Amortization and Currency Translation Adjustments	$ (20)	$ (20)
Maximum
Acquired Finite-Lived Intangible Assets
Amortization Life (in Years)	7 years
Minimum
Acquired Finite-Lived Intangible Assets
Amortization Life (in Years)	1 year

Goodwill and Acquired Intangi_5

Goodwill and Acquired Intangible Assets - Aggregate Amortization Expense for Acquired Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense - Actual 2018	$ 7	$ 8	$ 10
Amortization expense - 2019	5
Amortization expense - 2020	4
Amortization expense - 2021	4
Amortization expense - 2022	$ 2

Income Taxes - Income Before In

Income Taxes - Income Before Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
United States	$ (79)	$ (26)	$ 93
Foreign	106	84	128
Total income before income taxes	$ 27	$ 58	$ 221

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal	$ (10)	$ 132	$ 67
State and local	6	2	7
Foreign	19	25	25
Deferred
Federal	(20)	(22)	7
State and local	(4)	(4)	1
Foreign	6	(8)	(11)
Total income tax (benefit) expense	$ (3)	$ 125	$ 96
Effective income tax rate	(11.10%)	215.50%	43.40%

Income Taxes - Difference Betwe

Income Taxes - Difference Between the Effective Tax Rate and the U.S. Federal Statutory Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense at the U.S. federal tax rate	21.00%	35.00%	35.00%
Foreign income tax differential	2.10%	(22.60%)	(14.00%)
U.S. tax on foreign earnings	2.00%	4.30%	0.90%
State and local income taxes	(25.00%)	(11.00%)	0.20%
U.S. permanent book/tax differences	(2.70%)	(1.50%)	1.30%
U.S. research and development tax credits	(29.50%)	(11.20%)	(1.60%)
Change in valuation allowance	27.70%	10.00%	0.80%
U.S. manufacturing deduction permanent difference	0.00%	(8.00%)	(3.50%)
Goodwill impairment	0.00%	0.00%	8.90%
Tax impact of sale of marketing applications business	0.00%	0.00%	9.90%
Tax impact of equity compensation	(1.40%)	0.70%	2.40%
Tax impact of U.S. tax law change - IRC Section 987	0.00%	0.00%	3.50%
Deferred tax impact from U.S. rate change from Tax Reform	0.00%	(27.00%)	0.00%
Tax impact of U.S. Tax Reform/ Transition Tax	(23.90%)	250.00%	0.00%
Tax Impact of uncertain tax positions	20.20%	(3.60%)	(0.60%)
Other, net	(1.60%)	0.40%	0.20%
Effective income tax rate	(11.10%)	215.50%	43.40%

Income Taxes - Additional infor

Income Taxes - Additional information (Detail) - USD ($)	3 Months Ended					12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes
Tax Cuts and Jobs Act, change in tax rate, income tax expense (benefit)		$ (126,000,000)				$ 6,000,000
Tax expense, issuance of new US Treasury regulations			$ 8,000,000			1,000,000
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional liability	$ 1,000,000	(145,000,000)				1,000,000	$ (145,000,000)
Cumulative foreign earnings		1,300,000,000
Tax Cuts and Jobs Act of 2017, deferred tax asset, existing income tax expense (benefit)		19,000,000
Impairment of goodwill and acquired intangibles	0				$ 57,000,000
Income tax (benefit) expense						(3,000,000)	125,000,000	$ 96,000,000
Effective income tax rate reconciliation, excess tax expense			5,000,000
Net operating loss and tax credit carryforwards	63,000,000					63,000,000
Valuation allowance	38,000,000					38,000,000
Tax liability related to uncertain tax positions	34,000,000	28,000,000	$ 30,000,000			34,000,000	28,000,000	$ 30,000,000
Uncertain tax positions recognized as current liability on balance sheet	34,000,000					34,000,000
Uncertain tax positions	17,000,000	$ 14,000,000				17,000,000	$ 14,000,000
Uncertain tax positions related to business acquisitions not recognized on balance sheet	17,000,000					17,000,000
Interest accruals related to uncertain tax liabilities	2,000,000					2,000,000
United States And Certain Foreign Jurisdictions
Income Taxes
Net operating loss carryforwards in the United States and certain foreign jurisdictions	11,000,000					11,000,000
Domestic Tax Authority
Income Taxes
Net operating loss carryforwards in the United States and certain foreign jurisdictions	1,000,000					1,000,000
Research Tax Credit Carryforward
Income Taxes
Research and development tax credit carryforwards	$ 51,000,000					$ 51,000,000
Marketing Applications
Income Taxes
Income tax (benefit) expense				$ 22,000,000

Income Taxes - Deferred Income

Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred income tax assets
Employee pensions and other liabilities	$ 49	$ 50
Other balance sheet reserves and allowances	18	13
Tax loss and credit carryforwards	63	59
Deferred revenue	20	3
Other	0	2
Total deferred income tax assets	150	127
Valuation allowance	(39)	(32)
Net deferred income tax assets	111	95
Deferred income tax liabilities
Intangibles and capitalized software	17	30
Property and equipment	11	12
Other	19	0
Total deferred income tax liabilities	47	42
Total net deferred income tax assets	$ 64	$ 53

Income Taxes - Liability Relate

Income Taxes - Liability Related to Uncertain Tax Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 28	$ 30
Gross decreases for prior period tax positions	0	(1)
Gross increases for prior period tax positions	3	0
Gross increases for current period tax positions	8	3
Decreases due to the lapse of applicable statute of limitations	(1)	(4)
Decreases relating to settlements with taxing authorities	4	0
Balance at December 31	$ 34	$ 28

Employee Stock-based Compensa_3

Employee Stock-based Compensation Plans - Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock options	$ 6	$ 9	$ 9
Restricted shares	56	56	51
Employee share repurchase program	3	3	2
Total stock-based compensation before income taxes	65	68	62
Tax benefit	(11)	(21)	(13)
Total stock-based compensation, net of tax	$ 54	$ 47	$ 49

Employee Stock-based Compensa_4

Employee Stock-based Compensation Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to be issued under the Teradata SIP (in shares)	17,500,000
Weighted-average fair value of options granted for Teradata equity awards (in usd per share)	$ 0	$ 11.08	$ 10.68
Employee Stock Purchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase program discount from average market price	15.00%
Percentage of authorized payroll deductions for common stock purchases by employees	10.00%
Shares authorized to be issued under the Employee Stock Purchase Program	7,000,000
Remaining shares authorized to be issued under the Employee Stock Purchase Program	2,700,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, term (in years)	10 years
Vesting period (in years)	4 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost related to unvested stock grants	$ 6
Cost expected to be recognized over a weighted-average period (in years)	1 year 8 months
Service-Based Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Performance Based Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	1 year
Performance Based Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost related to unvested stock grants	$ 67
Cost expected to be recognized over a weighted-average period (in years)	1 year 11 months 12 days
Special 2016 PSRSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period	3 years
Special 2016 PSRSU | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share percentage	0.00%
Special 2016 PSRSU | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share percentage	200.00%

Employee Stock-based Compensa_5

Employee Stock-based Compensation Plans - Fair Value of Each Option Award on the Grant Date Using the Black-Scholes Option-Pricing Model (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield	0.00%	0.00%
Risk-free interest rate	1.99%	2.08%
Expected volatility	35.00%	35.20%
Expected term (years)	6 years 3 months 18 days	6 years 3 months 18 days

Employee Stock-based Compensa_6

Employee Stock-based Compensation Plans - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Shares Under Option
Outstanding at beginning of period (in shares)	5,373
Granted (in shares)	0
Exercised (in shares)	(885)
Canceled (in shares)	(207)
Forfeited (in shares)	(133)
Outstanding at end of period (in shares)	4,148	5,373
Fully vested and expected to vest at period end (in shares)	4,148
Exercisable at period end (in shares)	3,608
Weighted- Average Exercise Price per Share
Outstanding at beginning of period (in usd per share)	$ 37.63
Granted (in usd per share)	0
Exercised (in usd per share)	23.69
Canceled (in usd per share)	47.79
Forfeited (in usd per share)	30.12
Outstanding at end of period (in usd per share)	40.34	$ 37.63
Fully vested and expected to vest at period end (in usd per share)	40.34
Exercisable at period end (in usd per share)	$ 42.05
Weighted- Average Remaining Contractual Term (in years)
Weighted-average remaining contractual term (in years)	3 years 9 months	4 years 6 months
Fully vested and expected to vest at period end (in years)	3 years 9 months
Exercisable at period end (in years)	3 years 2 months
Aggregate Intrinsic Value (in millions)
Aggregate Intrinsic Value	$ 15	$ 30
Fully vested and expected to vest at period end	15
Exercisable at period end	$ 10

Employee Stock-based Compensa_7

Employee Stock-based Compensation Plans - Total Intrinsic Value of Options Exercised and The Cash Received (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Intrinsic value of options exercised	$ 15	$ 6	$ 13
Cash received from option exercises	21	19	18
Tax benefit realized from option exercises	$ 3	$ 2	$ 5

Employee Stock-based Compensa_8

Employee Stock-based Compensation Plans - Restricted Stock and Restricted Stock Unit Activity (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Number of Shares
Unvested shares at January 1, 2018 (in shares) | shares	4,226
Granted (in shares) | shares	994
Vested (in shares) | shares	(1,636)
Forfeited/canceled (in shares) | shares	(353)
Unvested shares at December 31, 2018 (in shares) | shares	3,231
Weighted- Average Grant Date Fair Value per Share
Unvested shares at January 1, 2016 (in usd per share) | $ / shares	$ 32.76
Granted (in usd per share) | $ / shares	37.98
Vested (in usd per share) | $ / shares	37.86
Forfeited/canceled (in usd per share) | $ / shares	34.44
Unvested shares at December 31, 2016 (in usd per share) | $ / shares	$ 34.27

Employee Stock-based Compensa_9

Employee Stock-based Compensation Plans - Weighted-Average Fair Value and Total Fair Value of Shares Vested (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of restricted shares units granted (in usd per share)	$ 37.98
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of restricted shares units granted (in usd per share)	$ 37.98	$ 34.88	$ 26.61
Total fair value of shares vested (in millions)	$ 53	$ 50	$ 61

Employee Stock-based Compens_10

Employee Stock-based Compensation Plans - Composition of Teradata Restricted Stock Grants (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares | shares	994
Weighted-average fair value of restricted shares units granted (in usd per share) | $ / shares	$ 37.98
Service-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares | shares	482
Weighted-average fair value of restricted shares units granted (in usd per share) | $ / shares	$ 39.32
Performance-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares | shares	512
Weighted-average fair value of restricted shares units granted (in usd per share) | $ / shares	$ 36.62

Employee Stock-based Compens_11

Employee Stock-based Compensation Plans - Employee Purchases and Aggregate Cost (Details) - Employee Stock Puchase Program - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity, Class of Treasury Stock [Line Items]
Employee share purchases (in shares)	0.5	0.6	0.6
Aggregate cost	$ 17	$ 15	$ 13

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Pension and Postemployment Benefit Costs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8	$ 9	$ 8
Interest cost	3	3	3
Expected return on plan assets	(2)	(2)	(2)
Settlement charge	0	0	1
Curtailment charge	(1)	0	0
Amortization of actuarial loss	1	1	1
Amortization of prior service (credit) cost	0	(1)	0
Divestiture	0	0	(2)
Total costs	9	10	9
Postemployment
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	7	6
Interest cost	1	1	1
Expected return on plan assets	0	0	0
Settlement charge	0	0	0
Curtailment charge	0	0	0
Amortization of actuarial loss	4	2	1
Amortization of prior service (credit) cost	0	1	2
Divestiture	0	0	(1)
Total costs	$ 13	$ 11	$ 9

Employee Benefit Plans - Change

Employee Benefit Plans - Changes in Benefit Obligations Plan Assets Funded Status and Reconciliation of Funded Status to Amounts Recognized in Consolidated Balance Sheets and in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension
Change in benefit obligation
Benefit obligation at January 1	$ 136	$ 120
Service cost	8	9	$ 8
Interest cost	3	3	3
Plan participant contributions	1	1
Actuarial (gain) loss	(5)	(3)
Benefits paid	(2)	(4)
Curtailment	(1)	0
Settlement	(4)	0
Currency translation adjustments	(4)	10
Benefit obligation at December 31	132	136	120
Change in plan assets
Fair value of plan assets at January 1	75	64
Actual return on plan assets	(2)	5
Company contributions	5	5
Benefits paid	(2)	(4)
Currency translation adjustments	(1)	4
Plan participant contribution	1	1
Settlements	(4)	0
Other	(4)	0
Fair value of plan assets at December 31	68	75	64
Funded status (underfunded)	(64)	(61)
Amounts Recognized in the Consolidated Balance Sheet
Non-current assets	5	10
Current liabilities	(1)	(2)
Non-current liabilities	(68)	(69)
Net amounts recognized	(64)	(61)
Amounts Recognized in Accumulated Other Comprehensive Income, Pension
Unrecognized Net actuarial loss	16	15
Unrecognized Prior service (credit) cost	0	(1)
Total	16	14
Postemployment
Change in benefit obligation
Benefit obligation at January 1	47	42
Service cost	8	7	6
Interest cost	1	1	1
Plan participant contributions	0	0
Actuarial (gain) loss	12	12
Benefits paid	(14)	(15)
Curtailment	0	0
Settlement	0	0
Currency translation adjustments	0	0
Benefit obligation at December 31	54	47	$ 42
Change in plan assets
Fair value of plan assets at January 1	0
Actual return on plan assets	0	0
Company contributions	0	0
Benefits paid	0	0
Currency translation adjustments	0	0
Plan participant contribution	0	0
Settlements	0	0
Other	0	0
Fair value of plan assets at December 31	0	0
Funded status (underfunded)	(54)	(47)
Amounts Recognized in the Consolidated Balance Sheet
Non-current assets	0	0
Amounts Recognized in Accumulated Other Comprehensive Income (Loss)
Current liabilities	(9)	(7)
Non-current liabilities	(45)	(40)
Net amounts recognized	(54)	(47)
Amounts Recognized in Accumulated Other Comprehensive Income, Pension
Unrecognized Net actuarial loss	44	37
Unrecognized Prior service (credit) cost	3	3
Total	$ 47	$ 40

Employee Benefit Plans - Accumu

Employee Benefit Plans - Accumulated Pension Benefit Obligation (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated pension benefit obligation	$ 122	$ 125

Employee Benefit Plans - Accu_2

Employee Benefit Plans - Accumulated Benefit Obligation in Excess of Plan Assets (Details) - Pension - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 68	$ 69
Accumulated benefit obligation	61	63
Fair value of plan assets	$ 0	$ 0

Employee Benefit Plans - Pre-ta

Employee Benefit Plans - Pre-tax Net Changes in Projected Benefit Obligations Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Total recognized in other comprehensive (loss) income	$ (14)	$ (6)	$ (12)
Pension
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss arising during the year	(2)	(7)
Amortization of loss included in net periodic benefit cost	(1)	(1)	(1)
Prior service (credit) cost arising during the year	0	0
Recognition of gain due to curtailment	1	0
Foreign currency exchange	(1)	2
Total recognized in other comprehensive (loss) income	(3)	(6)
Postemployment
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss arising during the year	12	13
Amortization of loss included in net periodic benefit cost	(4)	(2)	$ (1)
Prior service (credit) cost arising during the year	0	(1)
Recognition of gain due to curtailment	0	0
Foreign currency exchange	0	0
Total recognized in other comprehensive (loss) income	$ 8	$ 10

Employee Benefit Plans - Amount

Employee Benefit Plans - Amounts in Accumulated Other Comprehensive Income Expected to be Recognized as Components of Net Periodic Benefit Cost (Detail) $ in Millions	Dec. 31, 2018USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
Net loss to be recognized in other comprehensive income	$ 1
Postemployment
Defined Benefit Plan Disclosure [Line Items]
Net loss to be recognized in other comprehensive income	$ 5

Employee Benefit Plans - Weight

Employee Benefit Plans - Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.20%	2.10%
Rate of compensation increase	3.40%	3.30%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.10%	2.00%	2.40%
Rate of compensation increase	3.30%	3.30%	3.20%
Expected return on plan assets	2.80%	2.90%	3.00%
Postemployment
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.50%	2.60%
Rate of compensation increase	3.00%	3.00%
Involuntary turnover rate	2.50%	2.30%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.50%	2.60%	3.40%
Rate of compensation increase	3.00%	3.00%	3.00%
Expected return on plan assets	2.50%	2.30%	2.00%

Employee Benefit Plans - Weig_2

Employee Benefit Plans - Weighted Average Asset Allocations by Asset Category (Detail)	Dec. 31, 2018	Dec. 31, 2017
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Actual Asset Allocation as of December 31	100.00%	100.00%
Target Asset	100.00%
Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Actual Asset Allocation as of December 31	32.00%	32.00%
Target Asset	32.00%
Debt securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Actual Asset Allocation as of December 31	51.00%	41.00%
Target Asset	50.00%
Insurance (annuity) contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Actual Asset Allocation as of December 31	12.00%	17.00%
Target Asset	12.00%
Real-estate
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Actual Asset Allocation as of December 31	3.00%	8.00%
Target Asset	3.00%
Other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Actual Asset Allocation as of December 31	2.00%	2.00%
Target Asset	3.00%

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Retirement Benefits [Abstract]
Amount of gains and losses to be amortized to the extent that they exceed 10% of the higher of the market-related value or the projected benefit obligation of each respective plan	10.00%
Estimated benefits in the next fiscal year	$ 4

Employee Benefit Plans - Sche_2

Employee Benefit Plans - Schedule of Pension Plan Assets at Fair Value (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 8	$ 12	$ 11
Recurring
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	68	75
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	60	63
Recurring | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	8	12
Recurring | Money market funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	1	2
Recurring | Money market funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Money market funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	1	2
Recurring | Money market funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Equity funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	22	24
Recurring | Equity funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Equity funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	22	24
Recurring | Equity funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Bond/fixed-income funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	35	31
Recurring | Bond/fixed-income funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Bond/fixed-income funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	35	31
Recurring | Bond/fixed-income funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Real-estate indirect investments
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2	6
Recurring | Real-estate indirect investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Real-estate indirect investments | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2	6
Recurring | Real-estate indirect investments | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	8	12
Recurring | Insurance contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Insurance contracts | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Insurance contracts | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 8	$ 12

Employee Benefit Plans - Summar

Employee Benefit Plans - Summary of Changes in Fair Value of Pension Plan Level 3 Assets (Detail) - Insurance contracts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at January 1	$ 12	$ 11
Purchases, sales and settlements, net	(4)	1
Fair value of plan assets at December 31	$ 8	$ 12

Employee Benefit Plans - Estima

Employee Benefit Plans - Estimated Future Benefit Payments (Detail) $ in Millions	Dec. 31, 2018USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
2,019	$ 3
2,020	4
2,021	5
2,022	5
2,023	5
2024-2028	31
Post Employment Benefit
Defined Benefit Plan Disclosure [Line Items]
2,019	9
2,020	9
2,021	9
2,022	9
2,023	9
2024-2028	$ 44

Employee Benefit Plans U.S and

Employee Benefit Plans U.S and International Subsidiary Savings Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. savings plan
Defined Benefit Plan Disclosure [Line Items]
Expense for the U.S. and International subsidiary savings plan	$ 22	$ 21	$ 19
International subsidiary savings plans
Defined Benefit Plan Disclosure [Line Items]
Expense for the U.S. and International subsidiary savings plan	$ 17	$ 17	$ 16

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Schedule of Foreign Exchange Contracts (Detail) - USD ($) $ in Millions	1 Months Ended
	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Derivative
Net contract notional amount of foreign exchange forward contracts		$ 35	$ 23
Foreign Exchange Contract
Derivative
Notional amount of contracts		256	147
Interest Rate Swap
Derivative
Interest rate swap, agreement period	5 years
Notional amount of contracts	$ 500	$ 500	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)rentals
Commitments and Contingencies Disclosure [Abstract]
Maximum future payment obligation of the guaranteed value and associated liabilities | $	$ 3
Number of contingent rentals | rentals	0

Commitments and Contingencies_2

Commitments and Contingencies - Warranty Reserve Activity (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance at January 1	$ 4	$ 5	$ 6
Accruals for warranties issued	5	6	8
Settlements (in cash or kind)	(6)	(7)	(9)
Balance at end of period	$ 3	$ 4	$ 5

Commitments and Contingencies_3

Commitments and Contingencies - Future Minimum Operating Lease Payments and Committed Subleases Under Non-cancelable Leases (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Operating lease obligations - Total Amounts	$ 73
Operating lease obligations - 2019	24
Operating lease obligations - 2020	20
Operating lease obligations - 2021	12
Operating lease obligations - 2022	11
Operating lease obligations - 2023 and Thereafter	6
Sublease rentals - Total Amounts	(10)
Sublease rentals - 2019	(6)
Sublease rentals - 2020	(4)
Sublease rentals - 2021	0
Sublease rentals - 2022	0
Sublease rentals - 2023 and thereafter	0
Total committed operating leases less sublease rentals - Total Amounts	63
Total committed operating leases less sublease rentals - 2019	18
Total committed operating leases less sublease rentals - 2020	16
Total committed operating leases less sublease rentals - 2021	12
Total committed operating leases less sublease rentals - 2022	11
Total committed operating leases less sublease rentals - 2023 and Thereafter	6
Rental expense	24	$ 24	$ 24
Sublease rental income	$ 6	$ 5	$ 3

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis and Subject to Fair Value Disclosure Requirements (Detail) - USD ($) $ in Millions	1 Months Ended
	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market funds		$ 246	$ 501
Quoted Price as in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market funds		246	501
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market funds		0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Money market funds		0	0
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap, agreement period	5 years
Notional amount of contracts	$ 500	500	$ 0
Interest rate swap		7
Interest Rate Swap | Quoted Price as in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap		0
Interest Rate Swap | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap		7
Interest Rate Swap | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swap		$ 0

Debt and Capital Leases - Addit

Debt and Capital Leases - Additional Information (Detail) - USD ($)	Jun. 11, 2018	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Revolving Credit Facility | Revolving Credit Facility Ending In June 2023
Debt Instrument
Credit facility maximum borrowing capacity	$ 400,000,000
Additional borrowings capacity under Revolving Credit Agreement	200,000,000
Line of Credit | Revolving Credit Facility | Revolving Credit Facility Ending In June 2023
Debt Instrument
Borrowings outstanding under Credit Facility			$ 240,000,000
Revolving credit agreement period (in years)		5 years	5 years
Interest rate			5.00%
Unamortized debt issuance expense		$ 1,000,000
Term Loan
Debt Instrument
Interest rate			3.375%
Unamortized debt issuance expense		2,000,000
Debt instrument, face amount				$ 600,000,000
Amount of debt extinguished	$ 525,000,000
Long-term debt			$ 540,000,000
Term Loan | Senior Unsecured term loan Issued June 2018
Debt Instrument
Revolving credit agreement period (in years)	5 years
Debt instrument, face amount	$ 500,000,000
Long-term debt		$ 500,000,000
Fixed rate on term loan		2.86%
All-in fixed rate		4.36%
Capital Lease Obligations
Debt Instrument
Revolving credit agreement period (in years)		3 years
Interest rate		5.01%
Assets acquired by capital leases		$ 52,000,000
Capital lease obligations		$ 47,000,000
First eight payments | Term Loan | Senior Unsecured term loan Issued June 2018
Debt Instrument
Interest rate		1.25%
Next four payments | Term Loan | Senior Unsecured term loan Issued June 2018
Debt Instrument
Interest rate		2.50%
Next three payments | Term Loan | Senior Unsecured term loan Issued June 2018
Debt Instrument
Interest rate		5.00%

Debt and Capital Leases - Annua

Debt and Capital Leases - Annual Contractual Maturities of Principal on Debt Outstanding (Detail) $ in Millions	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
2,019	$ 19
2,020	25
2,021	44
2,022	87
2,023	325
Total	$ 500

Debt and Capital Leases - Minim

Debt and Capital Leases - Minimum Lease Payments, Capital Leases (Details) $ in Millions	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
2,019	$ 19
2,020	18
2,021	13
Total	50
Amount representing interest	(3)
Present value of minimum lease payments	$ 47

Debt and Capital Leases - Inter

Debt and Capital Leases - Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Interest expense on term loan and credit facility	$ 21	$ 15	$ 12
Interest expense on capital leases	$ 1	$ 0	$ 0

Segment, Other Supplemental I_3

Segment, Other Supplemental Information and Concentrations - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018segment
Segment Reporting [Abstract]
Number of operating segments	2

Segment, Other Supplemental I_4

Segment, Other Supplemental Information and Concentrations - Regional Segment Revenue and Gross Margin for Company (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 588	$ 526	$ 544	$ 506	$ 626	$ 526	$ 513	$ 491	$ 2,164	$ 2,156	$ 2,322
Gross profit	289	264	250	223	307	250	242	225	1,026	1,024	1,189
Total segment gross profit									1,095	1,112	1,276
Stock-based compensation expense									15	13	14
Amortization of acquisition-related intangible assets									0	0	2
Acquisition, integration and reorganization-related costs									5	4	9
Amortization of capitalized software costs									49	71	62
Selling, general and administrative expenses									666	651	662
Research and development expenses									317	305	212
Impairment of goodwill, acquired intangibles and other assets									0	0	80
Income from operations	$ 23	$ 14	$ 10	$ (4)	$ 60	$ 9	$ (1)	$ 0	43	68	235
Americas
Segment Reporting Information [Line Items]
Revenue									1,126	1,195	1,334
Gross profit									621	675	797
International
Segment Reporting Information [Line Items]
Revenue									1,038	961	919
Gross profit									474	437	445
Total Data and Analytics
Segment Reporting Information [Line Items]
Revenue									2,164	2,156	2,253
Gross profit									1,095	1,112	1,242
Marketing Applications
Segment Reporting Information [Line Items]
Revenue									0	0	69
Gross profit									$ 0	$ 0	$ 34

Segment, Other Supplemental I_5

Segment, Other Supplemental Information and Concentrations - Schedule of Revenue by Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 588	$ 526	$ 544	$ 506	$ 626	$ 526	$ 513	$ 491	$ 2,164	$ 2,156	$ 2,322
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,018	1,089	1,246
Americas (excluding United States)
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									108	107	123
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 1,038	$ 960	$ 953

Segment, Other Supplemental I_6

Segment, Other Supplemental Information and Concentrations - Schedule of Property and Equipment by Geographic Area (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Identifiable Assets By Segment [Line Items]
Property and equipment, net	$ 295	$ 162
United States
Schedule Of Identifiable Assets By Segment [Line Items]
Property and equipment, net	226	119
Americas (excluding United States)
Schedule Of Identifiable Assets By Segment [Line Items]
Property and equipment, net	18	11
International
Schedule Of Identifiable Assets By Segment [Line Items]
Property and equipment, net	$ 51	$ 32

Business Combinations and Oth_2

Business Combinations and Other Investment Activities - Additional Information (Detail) - Series of Individually Immaterial Business Acquisitions $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)Business_Acquisitions
Business Acquisition
Number of businesses acquired | Business_Acquisitions		1
Consideration transferred | $	$ 21	$ 16

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (AOCI) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 668	$ 971
Other comprehensive (loss) income before reclassifications	(32)	11	$ (16)
Amounts reclassified from AOCI	5	4	3
Net other comprehensive (loss) income	(27)	15	(13)
Ending balance	495	668	849
Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0	0
Other comprehensive (loss) income before reclassifications	(6)	0	0
Amounts reclassified from AOCI	0	0	0
Net other comprehensive (loss) income	(6)	0	0
Ending balance	(6)	0	0
Defined benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(36)	(35)
Other comprehensive (loss) income before reclassifications	(13)	(5)	(9)
Amounts reclassified from AOCI	5	4	3
Net other comprehensive (loss) income	(8)	(1)	(6)
Ending balance	(44)	(36)	(29)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(38)	(54)
Other comprehensive (loss) income before reclassifications	(13)	16	(7)
Amounts reclassified from AOCI	0	0	0
Net other comprehensive (loss) income	(13)	16	(7)
Ending balance	(51)	(38)	(47)
Total AOCI
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(74)	(89)
Ending balance	$ (101)	$ (74)	$ (76)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Impact and Location of AOCI Reclassifications in Consolidated Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Other Expense									$ (8)	$ (6)	$ (8)
Income tax benefit									3	(125)	(96)
Net income (loss)	$ 15	$ 18	$ 4	$ (7)	$ (74)	$ 13	$ (4)	$ (2)	30	(67)	125
Amount Reclassified from of Accumulated Other Comprehensive Income
Defined Benefit Plan Disclosure [Line Items]
Other Expense									(6)	(5)	(4)
Income tax benefit									1	1	1
Net income (loss)									$ (5)	$ (4)	$ (3)

Reorganization and Business T_3

Reorganization and Business Transformation (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Asset write-downs	$ 0	$ 57,000,000
Marketing Applications
Restructuring Cost and Reserve [Line Items]
Total reorganization and business transformation cost			$ 23,000,000	$ 26,000,000	$ 129,000,000
Employee severance and other employee related cost			0	2,000,000	14,000,000
Asset write-downs			0	0	80,000,000
Professional services, legal and other associated cost			0	24,000,000	35,000,000
Payments for restructuring			11,000,000
Employee separation benefits costs related to headquarter transition and business transformation | Marketing Applications
Restructuring Cost and Reserve [Line Items]
Total reorganization and business transformation cost			14,000,000	0	0
Transition support and other exit related costs for the headquarter transition and business transformation | Marketing Applications
Restructuring Cost and Reserve [Line Items]
Total reorganization and business transformation cost			9,000,000	0	0
Employee Severance | Marketing Applications
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			1,000,000	1,000,000	20,000,000
2015 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total reorganization and business transformation cost				$ 26,000,000	$ 129,000,000
Minimum
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	35,000,000		35,000,000
Minimum | 2018 Consolidation Plan | Accelerated Depreciation For Right-To-Use Assets
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	6,000,000,000,000		6,000,000,000,000
Minimum | 2018 Consolidation Plan | Outsider Services, Legal, And Other Associated Costs
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	8,000,000,000,000		8,000,000,000,000
Minimum | 2018 Consolidation Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	21,000,000,000,000		21,000,000,000,000
Maximum
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	45,000,000		45,000,000
Maximum | 2018 Consolidation Plan | Accelerated Depreciation For Right-To-Use Assets
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	8,000,000,000,000		8,000,000,000,000
Maximum | 2018 Consolidation Plan | Outsider Services, Legal, And Other Associated Costs
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	11,000,000,000,000		11,000,000,000,000
Maximum | 2018 Consolidation Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Estimated costs to be incurred	26,000,000,000,000		26,000,000,000,000
Other Current Liabilities | Marketing Applications
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 12,000,000		$ 12,000,000

Impairment and Sale of the Ma_2

Impairment and Sale of the Marketing Applications Business - Narrative (Details) - USD ($)	Jul. 01, 2016	Dec. 31, 2018	Sep. 30, 2016	Mar. 31, 2016	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 22, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of goodwill and acquired intangibles		$ 0		$ 57,000,000
Impairment of goodwill, acquired intangibles and other assets						$ 0	$ 0	$ 80,000,000
Proceeds from sale of business						0	0	92,000,000
Income tax (benefit) expense						$ (3,000,000)	$ 125,000,000	$ 96,000,000
Marketing Applications
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax (benefit) expense			$ 22,000,000
Income tax expense, related to goodwill			$ 14,000,000
Marketing Applications | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue					$ 69,000,000
Operating loss					112,000,000
Impairment of goodwill, acquired intangibles and other assets					$ 76,000,000
Marketing Applications | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of goodwill and acquired intangibles				57,000,000
Payments to acquire intangible assets				$ 19,000,000
Affiliated Entity | Marketing Applications | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred									$ 90,000,000
Proceeds from sale of business	$ 92,000,000
Transaction cost	$ 5,000,000

Quarterly Information (unaudi_3

Quarterly Information (unaudited) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 588	$ 526	$ 544	$ 506	$ 626	$ 526	$ 513	$ 491	$ 2,164	$ 2,156	$ 2,322
Gross profit	289	264	250	223	307	250	242	225	1,026	1,024	1,189
Operating (loss) income	23	14	10	(4)	60	9	(1)	0	43	68	235
Net income (loss)	$ 15	$ 18	$ 4	$ (7)	$ (74)	$ 13	$ (4)	$ (2)	$ 30	$ (67)	$ 125
Net (loss) income per share:
Basic (in usd per share)	$ 0.13	$ 0.15	$ 0.03	$ (0.06)	$ (0.61)	$ 0.11	$ (0.03)	$ (0.02)	$ 0.25	$ (0.53)	$ 0.96
Diluted (in usd per share)	$ 0.13	$ 0.15	$ 0.03	$ (0.06)	$ (0.61)	$ 0.10	$ (0.03)	$ (0.02)	$ 0.25	$ (0.53)	$ 0.95
Tax Cuts and Jobs Act of 2017, existing income tax expense (benefit)					$ 126

SCHEDULE II-VALUATION AND QUA_2

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 12	$ 19	$ 22
Provision/reversals Charged to Costs & Expenses	2	(6)	3
Charged to Other Accounts	0	0	0
Deductions	0	1	6
Balance at End of Period	14	12	19
Deferred tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	32	26	25
Provision/reversals Charged to Costs & Expenses	7	6	1
Charged to Other Accounts	0	0	0
Deductions	0	0	0
Balance at End of Period	39	$ 32	$ 26
Marketing Applications | Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Deductions	$ 5

Uncategorized Items - tdc-20181

Label	Element	Value
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	$ 26,000,000
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	0
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	0
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	1,000,000
Retained Earnings [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	$ 26,000,000