Cognizant Technology Solutions (CTSH) 10-K 16 Feb 22 2021 FY Annual report Financial data

Cover Cover

Cover Cover - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Feb. 11, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	0-24429
Entity Registrant Name	COGNIZANT TECHNOLOGY SOLUTIONS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3728359
Entity Address, Address Line One	300 Frank W. Burr Blvd.
Entity Address, City or Town	Teaneck
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07666
City Area Code	201
Local Phone Number	801-0233
Title of 12(b) Security	Class A Common Stock, $0.01 par value per share
Trading Symbol	CTSH
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 36.4
Entity Common Stock, Shares Outstanding		524,534,828
Documents Incorporated by Reference	The following documents are incorporated by reference into the Annual Report on Form 10-K: Portions of the registrant’s definitive Proxy Statement for its 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001058290

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Firm ID	238
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	New York, New York

Consolidated Statements Of Fina

Consolidated Statements Of Financial Position - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 1,792	$ 2,680
Short-term investments	927	44
Trade accounts receivable, net	3,557	3,087
Other current assets	1,066	1,040
Total current assets	7,342	6,851
Property and equipment, net	1,171	1,251
Operating lease assets, net	933	1,013
Goodwill	5,620	5,031
Intangible assets, net	1,218	1,046
Deferred income tax assets, net	404	445
Long-term investments	463	440
Other noncurrent assets	701	846
Total assets	17,852	16,923
Liabilities and Stockholders' Equity
Accounts payable	361	389
Deferred revenue	403	383
Short-term debt	38	38
Operating lease liabilities	195	211
Accrued expenses and other current liabilities	2,532	2,519
Total current liabilities	3,529	3,540
Deferred revenue, noncurrent	40	36
Operating lease liabilities, noncurrent	783	846
Deferred income tax liabilities, net	218	206
Long-term debt	626	663
Long-term income taxes payable	378	428
Other noncurrent liabilities	287	368
Total liabilities	5,861	6,087
Commitments and contingencies (See Note 15)
Stockholders' Equity:
Preferred stock, $0.10 par value, 15 shares authorized, none issued	0	0
Class A common stock, $0.01 par value, 1,000 shares authorized, 525 and 530 shares issued and outstanding as of December 31, 2021 and 2020, respectively	5	5
Additional paid-in capital	27	32
Retained earnings	11,922	10,689
Accumulated other comprehensive income (loss)	37	110
Total stockholders’ equity	11,991	10,836
Total liabilities and stockholders’ equity	$ 17,852	$ 16,923

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Position (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	15,000,000	15,000,000
Preferred stock, issued	0	0
Class A common stock, par value	$ 0.01	$ 0.01
Class A common stock, shares authorized	1,000,000,000	1,000,000,000
Class A common stock, shares issued	525,000,000	530,000,000
Class A common stock, shares outstanding	525,000,000	530,000,000

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Depreciation, Depletion and Amortization	$ 574	$ 552	$ 507
Revenues	18,507	16,652	16,783
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization expense shown separately below)	11,604	10,671	10,634
Selling, general and administrative expenses	3,503	3,100	2,972
Income from operations	2,826	2,114	2,453
Other income (expense), net:
Interest income	30	119	176
Interest expense	(9)	(24)	(26)
Foreign currency exchange gains (losses), net	(20)	(116)	(65)
Other, net	0	3	5
Total other income (expense), net	1	(18)	90
Income before provision for income taxes	2,827	2,096	2,543
Provision for income taxes	(693)	(704)	(643)
Income (loss) from equity method investments	3	0	(58)
Net income	$ 2,137	$ 1,392	$ 1,842
Basic earnings per share	$ 4.06	$ 2.58	$ 3.30
Diluted earnings per share	$ 4.05	$ 2.57	$ 3.29
Weighted average number of common shares outstanding—Basic	527	540	559
Dilutive effect of shares issuable under stock-based compensation plans	1	1	1
Weighted average number of common shares outstanding—Diluted	528	541	560
Dividends declared per common share (in usd per share)	$ 0.96	$ 0.88	$ 0.80
Restructuring Charges	$ 0	$ 215	$ 217

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 2,137	$ 1,392	$ 1,842
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	574	559	526
Deferred income taxes	27	184	(306)
Share-based Payment Arrangement, Noncash Expense	246	232	217
Other	(1)	119	119
Changes in assets and liabilities:
Trade accounts receivable	(407)	264	37
Other current and noncurrent assets	348	73	159
Accounts payable	(35)	109	8
Deferred revenue, current and noncurrent	19	65	56
Other current and noncurrent liabilities	(413)	302	(159)
Net cash provided by operating activities	2,495	3,299	2,499
Cash flows from investing activities:
Purchases of property and equipment	(279)	(398)	(392)
Purchases of available-for-sale investment securities	(430)	0	(333)
Proceeds from maturity or sale of available-for-sale investment securities	120	0	2,107
Purchases of held-to-maturity investment securities	(203)	(202)	(693)
Proceeds from maturity of held-to-maturity investment securities	180	467	1,498
Purchases of other investments	(1,660)	(531)	(483)
Proceeds from maturity or sale of other investments	1,078	549	501
Payments for business combinations, net of cash acquired	(970)	(1,123)	(617)
Net cash (used in) provided by investing activities	(2,164)	(1,238)	1,588
Cash flows from financing activities:
Issuance of common stock under stock-based compensation plans	130	142	159
Repurchases of common stock	(771)	(1,621)	(2,247)
Repayment of Term Loan borrowings and finance lease and earnout obligations	(53)	(50)	(28)
Proceeds from borrowing under the revolving credit facility	0	1,740	0
Repayment of notes outstanding under the revolving credit facility	0	1,740	0
Dividends paid	(509)	(480)	(453)
Net cash (used in) financing activities	(1,203)	(2,009)	(2,569)
Effect of exchange rate changes on cash and cash equivalents	(16)	(17)	(34)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(888)	35	1,484
Cash and cash equivalents, beginning of year	2,680	2,645	1,161
Cash and cash equivalents, end of year	1,792	2,680	2,645
Supplemental information:
Cash paid for income taxes during the year	625	745	870
Cash interest paid during the year	$ 7	$ 25	$ 25

Consolidated Statements Of Stoc

Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]		Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]		Accumulated other comprehensive income (loss):
AOCI, beginning balance at Dec. 31, 2018	$ 11,424	$ 2	[1]	$ 6	$ 47	$ 11,485	$ 2	[1]	$ (114)
Beginning balance, shares at Dec. 31, 2018				577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,842					1,842
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	76								76
Other comprehensive income (loss)	76
Common stock issued, stock-based compensation plans	159				159
Common stock issued, stock based compensation plans and other, shares				7
Stock-based compensation expense	217				217
Repurchases of common stock	$ (2,247)			$ (1)	(390)	(1,856)
Repurchases of common stock, shares				(36)
Dividends declared per common share (in usd per share)	$ 0.80
Dividends declared	$ (451)					(451)
AOCI, ending balance at Dec. 31, 2019	11,022	$ 1	[2]	$ 5	33	11,022	$ 1	[2]	(38)
Ending balance, shares at Dec. 31, 2019				548
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,392					1,392
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	148								148
Other comprehensive income (loss)	148
Common stock issued, stock-based compensation plans	142				142
Common stock issued, stock based compensation plans and other, shares				6
Stock-based compensation expense	232				232
Repurchases of common stock	$ (1,621)			$ 0	(375)	(1,246)
Repurchases of common stock, shares				(24)
Dividends declared per common share (in usd per share)	$ 0.88
Dividends declared	$ (480)					(480)
AOCI, ending balance at Dec. 31, 2020	$ 10,836			$ 5	32	10,689			110
Ending balance, shares at Dec. 31, 2020	530			530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 2,137					2,137
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(73)								(73)
Other comprehensive income (loss)	(73)
Common stock issued, stock-based compensation plans	130				130
Common stock issued, stock based compensation plans and other, shares				5
Stock-based compensation expense	246				246
Repurchases of common stock	$ (775)			$ 0	(381)	(394)
Repurchases of common stock, shares				(10)
Dividends declared per common share (in usd per share)	$ 0.96
Dividends declared	$ (510)					(510)
AOCI, ending balance at Dec. 31, 2021	$ 11,991			$ 5	$ 27	$ 11,922			$ 37
Ending balance, shares at Dec. 31, 2021	525			525
[1]	Reflects    the adoption of the New Lease Standard on January 1, 2019.
[2]	Reflects the adoption of the Credit Loss Standard on January 1, 2020.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,137	$ 1,392	$ 1,842
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(75)	119	39
Change in unrealized gains and losses on cash flow hedges	2	29	29
Change in unrealized losses on available-for-sale investment securities	0	0	8
Other comprehensive income (loss)	(73)	148	76
Comprehensive income	$ 2,064	$ 1,540	$ 1,918

Consolidated Statements Of St_2

Consolidated Statements Of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in usd per share)	$ 0.96	$ 0.88	$ 0.80

Business Description and Summar

Business Description and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Business Description and Summary of Significant Accounting Policies	The terms “Cognizant,” “we,” “our,” “us” and “the Company” refer to Cognizant Technology Solutions Corporation and its subsidiaries unless the context indicates otherwise. Description of Business. We are one of the world’s leading professional services companies, engineering modern business for the digital era. Our services include digital services and solutions, consulting, application development, systems integration, application testing, application maintenance, infrastructure services and business process services. Digital services have become an increasingly important part of our portfolio, aligning with our clients' focus on becoming data-enabled, customer-centric and differentiated businesses. We are continuing to invest in digital services with a focus on four key areas: IoT, digital engineering, data and cloud. We tailor our services and solutions to specific industries with an integrated global delivery model that employs client service and delivery teams based at client locations and dedicated global and regional delivery centers. We help clients modernize technology, reimagine processes and transform experiences so they can stay ahead in a fast-changing world. Basis of Presentation, Principles of Consolidation and Use of Estimates. The consolidated financial statements are presented in accordance with GAAP and reflect the consolidated financial position, results of operations, comprehensive income and cash flows of our consolidated subsidiaries for all periods presented. All intercompany balances and transactions have been eliminated in consolidation. The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying disclosures. We evaluate our estimates on a continuous basis. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. The actual amounts may vary from the estimates used in the preparation of the accompanying consolidated financial statements. Cash and Cash Equivalents and Investments. Cash and cash equivalents consist of all cash balances, including money market funds, certificates of deposits and commercial paper that have a maturity, at the date of purchase, of 90 days or less. We determine the appropriate classification of our investments in marketable securities at the date of purchase and reevaluate such designation at each balance sheet date. We classify and account for our marketable debt securities as either available-for-sale or held-to-maturity. After consideration of our risk versus reward objectives, as well as our liquidity requirements, we may sell our available-for-sale securities prior to their stated maturities. We classify these marketable securities with maturities at the date of purchase beyond 90 days as short-term investments based on their highly liquid nature and because such marketable securities represent an investment of cash that is available for current operations. Available-for-sale securities are reported at fair value with changes in unrealized gains and losses recorded as a separate component of "Accumulated other comprehensive income (loss)" on the consolidated statements of financial position until realized. We determine the cost of the securities sold based on the specific identification method. Our held-to-maturity investment securities are financial instruments for which we have the intent and ability to hold to maturity and we classify these securities with maturities less than one year as short-term investments. Any held-to-maturity investment securities with maturities beyond one year from the balance sheet date are classified as long-term investments. Held-to-maturity securities are reported at amortized cost. Interest and amortization of premiums and discounts for debt securities are included in interest income. For available-for-sale debt securities, if we do not intend to sell the security or it is not more likely than not that we will be required to sell the security before recovery of our amortized cost, we evaluate qualitative criteria, such as the financial health of and specific prospects for the issuer, to determine whether we do not expect to recover the amortized cost basis of the security. We also evaluate quantitative criteria including determining whether there has been an adverse change in expected future cash flows. If we do not expect to recover the entire amortized cost basis of the security, we consider the security to contain an expected credit loss, and we record the difference between the security’s amortized cost basis and its recoverable amount in earnings as an allowance for credit loss and the difference between the security’s recoverable amount and fair value in other comprehensive income. If we intend to sell the security or it is more likely than not we will be required to sell the security before recovery of its amortized cost basis, the security is considered impaired, and we recognize the entire difference between the security’s amortized cost basis and its fair value in earnings. On initial recognition and on an ongoing basis, we evaluate our held-to-maturity investment securities for expected credit losses collectively when they share similar risk characteristics or individually, when the risk characteristics are different. The allowance for expected credit losses is determined using our historical loss experience. We monitor the credit ratings of the securities in our portfolio to evaluate the need for any changes to the allowance. An increase or a decrease in the allowance for expected credit losses is recorded through income as a credit loss expense or a reversal thereof. The allowance for expected credit losses is presented as a deduction from the amortized cost. A held-to-maturity investment security is written off when deemed uncollectible. Financial Assets and Liabilities. Cash and certain cash equivalents, time deposits, trade receivables, accounts payable and other accrued liabilities are short-term in nature and, accordingly, their carrying values approximate fair value. Property and Equipment. Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated on a straight-line basis over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of the term of the lease or the estimated useful life of the asset. Deposits paid towards acquisition of long-lived assets and the cost of assets not put in use by the balance sheet date are disclosed under the caption "Capital work-in-progress" in Note 6 . Leases. Our lease asset classes primarily consist of operating leases for office space, data centers and IT equipment. At inception of a contract, we determine whether a contract contains a lease, and if a lease is identified, whether it is an operating or finance lease. In determining whether a contract contains a lease we consider whether (1) we have the right to obtain substantially all of the economic benefits from the use of the asset throughout the term of the contract, (2) we have the right to direct how and for what purpose the asset is used throughout the term of the contract and (3) we have the right to operate the asset throughout the term of the contract without the lessor having the right to change the terms of the contract. Some of our lease agreements contain both lease and non-lease components that we account for as a single lease component for all of our lease asset classes. Our ROU lease assets represent our right to use an underlying asset for the lease term and may include any advance lease payments made and any initial direct costs and exclude lease incentives. Our lease liabilities represent our obligation to make lease payments arising from the terms of the lease. ROU lease assets and lease liabilities are recognized at the commencement of the lease and are calculated using the present value of lease payments over the lease term. Typically, our lease agreements do not provide sufficient detail to determine the rate implicit in the lease. Therefore, we use our estimated country-specific incremental borrowing rate based on information available at the commencement date of the lease to calculate the present value of the lease payments. In estimating our country-specific incremental borrowing rates, we consider market rates of comparable collateralized borrowings for similar terms. Our lease terms may include the option to extend or terminate the lease before the end of the contractual lease term. Our ROU lease assets and lease liabilities include these options when it is reasonably certain that they will be exercised. A portion of our real estate lease costs is subject to annual changes in the CPI. The changes to the CPI are treated as variable lease payments and are recognized in the period in which the obligation for those payments is incurred. Other variable lease costs primarily relate to adjustments for common area maintenance, utilities, property tax and lease concessions. These variable costs are recognized in the period in which the obligation is incurred. We elect not to recognize ROU assets and lease liabilities for short-term leases with a term equal to or less than 12 months. We recognize the lease payments in our income statement on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred. Both ROU assets and finance lease assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the related asset group may not be recoverable. Internal Use Software. We capitalize certain costs that are incurred to purchase, develop and implement internal-use software during the application development phase, which primarily include coding, testing and certain data conversion activities. Capitalized costs are amortized on a straight-line basis over the useful life of the software. Costs incurred in performing planning and post-implementation activities are expensed as incurred. Cloud Computing Arrangements. We defer certain implementation costs that are incurred when implementing cloud computing service or SaaS arrangements, which primarily include efforts associated with configuration and development activities. Once the service is ready for use, deferred costs are expensed over the term of the arrangement and recognized in income from operations. Software to be Sold, Leased or Marketed. We capitalize costs incurred after technological feasibility is reached but before software is available for general release to clients, which primarily include coding and testing activities. Once the product is ready for general release, capitalized costs are amortized over the useful life of the software. Business Combinations. We account for business combinations using the acquisition method, which requires the identification of the acquirer, the determination of the acquisition date and the allocation of the purchase price paid by the acquirer to the identifiable tangible and intangible assets acquired, the liabilities assumed, including any contingent consideration and any noncontrolling interest in the acquiree at their acquisition date fair values. Goodwill represents the excess of the purchase price over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. Identifiable intangible assets with finite lives are amortized over their expected useful lives. Acquisition-related costs are expensed in the periods in which the costs are incurred. The results of operations of acquired businesses are included in our consolidated financial statements from the acquisition date . Equity Method Investments. Equity investments that give us the ability to exercise significant influence, but not control, over an investee are accounted for using the equity method of accounting and recorded in the caption "Long-term investments" on our consolidated statements of financial position. Equity method investments are initially recorded at cost. We periodically review the carrying value of our equity method investments to determine if there has been an other-than-temporary decline in the carrying value. The investment balance is increased to reflect contributions and our share of earnings and decreased to reflect our share of losses, distributions, and other-than-temporary impairments. Our proportionate share of the net income or loss of the investee is recorded in the caption "Income (loss) from equity method investments" on our consolidated statements of operations. Long-lived Assets and Finite-lived Intangible Assets. We review long-lived assets and certain finite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. The carrying amount may not be recoverable when the sum of undiscounted expected future cash flows is less than the carrying amount of such asset groups. The impairment loss is determined as the amount by which the carrying amount of the asset group exceeds its fair value. Intangible assets consist primarily of customer relationships and developed technology, which are being amortized on a straight-line basis over their estimated useful lives. Goodwill and Indefinite-lived Intangible Assets. We evaluate goodwill and indefinite-lived intangible assets for impairment at least annually, or as circumstances warrant. Goodwill is evaluated at the reporting unit level by comparing the fair value of the reporting unit with its carrying amount including goodwill. An impairment of goodwill exists if the carrying amount of the reporting unit exceeds its fair value. The impairment loss is the amount by which the carrying amount exceeds the reporting unit’s fair value, limited to the total amount of goodwill allocated to that reporting unit. For indefinite-lived intangible assets, if our qualitative assessment indicates that it is more-likely-than-not that an indefinite-lived intangible asset is impaired, we test the assets for impairment by comparing the fair value of such assets to their carrying value. If an impairment is indicated, a write down to the fair value of indefinite-lived intangible asset is recorded. Stock Repurchase Program. Under the Board of Directors authorized stock repurchase program, the Company is authorized to repurchase its Class A common stock through open market purchases, including under a 10b5-1 Plan, or in private transactions, including thr ough ASR agreements en tered into with financial institutions, in accordance with applica ble federal securities laws. We account for the repurchased shares as constructively retired. Shares are returned to the status of authorized and unissued shares at the time of repurchase or in the periods they are delivered if repurchased under an ASR. To reflect share repurchases in the consolidated statements of financial position, we (1) reduce common stock for the par value of the shares, (2) reduce additional paid-in capital for the amount in excess of par during the period in which the shares are repurchased and (3) record any residual amount in excess of available additional paid-in capital to retained earnings. Upfront payments related to ASRs are accounted for as a reduction to stockholders’ equity in the consolidated statements of financial position in the period the payments are made. Revenue Recognition. We recognize revenues as we transfer control of deliverables (products, solutions and services) to our clients in an amount reflecting the consideration to which we expect to be entitled. To recognize revenues, we apply the following five step approach: (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 revenues when a performance obligation is satisfied. We account for a contract when it has approval and commitment from all parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. We apply judgment in determining the customer’s ability and intention to pay based on a variety of factors including the customer’s historical payment experience. For performance obligations where control is transferred over time, revenues are recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the deliverables to be provided. Revenues related to fixed-price contracts for application development and systems integration services, consulting or other technology services are recognized as the service is performed using the cost to cost method, under which the total value of revenues is recognized on the basis of the percentage that each contract’s total labor cost to date bears to the total expected labor costs. Revenues related to fixed-price application maintenance, testing and business process services are recognized based on our right to invoice for services performed for contracts in which the invoicing is representative of the value being delivered. If our invoicing is not consistent with the value delivered, revenues are recognized as the service is performed based on the cost to cost method described above. The cost to cost method requires estimation of future costs, which is updated as the project progresses to reflect the latest available information; such estimates and changes in estimates involve the use of judgment. The cumulative impact of any revision in estimates is reflected in the financial reporting period in which the change in estimate becomes known and any anticipated losses on contracts are recognized immediately, where appropriate. Revenues related to fixed-price hosting and infrastructure services are recognized based on our right to invoice for services performed for contracts in which the invoicing is representative of the value being delivered. If our invoicing is not consistent with the value delivered, revenues are recognized on a straight-line basis unless revenues are earned and obligations are fulfilled in a different pattern. The revenue recognition method applied to the types of contracts described above provides the most faithful depiction of performance towards satisfaction of our performance obligations; for example, the cost to cost method is used when the value of services provided to the customer is best represented by the costs expended to deliver those services. Revenues related to our time-and-materials, transaction-based or volume-based contracts are recognized over the period the services are provided either using an output method such as labor hours, or a method that is otherwise consistent with the way in which value is delivered to the customer. Revenues related to our non-hosted software license arrangements that do not require significant modification or customization of the underlying software are recognized when the software is delivered as control is transferred at a point in time. For software license arrangements that require significant functionality enhancements or modification of the software, revenues for the software license and related services are recognized as the services are performed in accordance with the methods applicable to application development and systems integration services described above. In software hosting arrangements, the rights provided to the customer, such as ownership of a license, contract termination provisions and the feasibility of the client to operate the software, are considered in determining whether the arrangement includes a license or a service. Sales and usage-based fees promised in exchange for licenses of intellectual property are not recognized as revenue until the uncertainty related to the variable amounts is resolved. Revenues related to software maintenance and support are generally recognized on a straight-line basis over the contract period. Incentive revenues, volume discounts, or any other form of variable consideration is estimated using either the sum of probability weighted amounts in a range of possible consideration amounts (expected value) or the single most likely amount in a range of possible consideration amounts (most likely amount), depending on which method better predicts the amount of consideration to which we may be entitled. We include in the transaction price variable consideration only to the extent it is probable that a significant reversal of revenues recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether and when to include estimated amounts in the transaction price may involve judgment and are based largely on an assessment of our anticipated performance and all information that is reasonably available to us. Revenues also include the reimbursement of out-of-pocket expenses. Our warranties generally provide a customer with assurance that the related deliverable will function as the parties intended because it complies with agreed-upon specifications and are therefore not considered an additional performance obligation in the contract. We may enter into arrangements that consist of multiple performance obligations. Such arrangements may include any combination of our deliverables. To the extent a contract includes multiple promised deliverables, we apply judgment to determine whether promised deliverables are capable of being distinct and are distinct in the context of the contract. If these criteria are not met, the promised deliverables are accounted for as a combined performance obligation. For arrangements with multiple distinct performance obligations, we allocate consideration among the performance obligations based on their relative standalone selling price. Standalone selling price is the price at which we would sell a promised good or service separately to the customer. When not directly observable, we typically estimate standalone selling price by using the expected cost plus a margin approach. We typically establish a standalone selling price range for our deliverables, which is reassessed on a periodic basis or when facts and circumstances change. We assess the timing of the transfer of goods or services to the customer as compared to the timing of payments to determine whether a significant financing component exists. As a practical expedient, we do not assess the existence of a significant financing component when the difference between payment and transfer of deliverables is a year or less. If the difference in timing arises for reasons other than the provision of finance to either the customer or us, no financing component is deemed to exist. The primary purpose of our invoicing terms is to provide customers with simplified and predictable ways of purchasing our services, not to receive or provide financing from or to customers. We do not consider set up or transition fees paid upfront by our customers to represent a financing component, as such fees are required to encourage customer commitment to the project and protect us from early termination of the contract. Our contracts may be modified to add, remove or change existing performance obligations. The accounting for modifications to our contracts involves assessing whether the services added to an existing contract are distinct and whether the pricing is at the standalone selling price. Services added that are not distinct are accounted for on a cumulative catch up basis, while those that are distinct are accounted for prospectively, either as a separate contract if the additional services are priced at the standalone selling price, or as a termination of the existing contract and creation of a new contract if not priced at the standalone selling price. Services added to our application development and systems integration service contracts are typically not distinct, while services added to our other contracts, including application maintenance, testing and business process services contracts, are typically distinct. From time to time, we may enter into arrangements with third party suppliers to resell products or services. In such cases, we evaluate whether we are the principal (i.e., report revenues on a gross basis) or agent (i.e., report revenues on a net basis). In doing so, we evaluate whether we control the good or service before it is transferred to the customer. If we control the good or service before it is transferred to the customer, we are the principal; if not, we are the agent. Determining whether we control the good or service before it is transferred to the customer may require judgment. Trade Accounts Receivable, Contract Assets and Contract Liabilities. We classify our right to consideration in exchange for deliverables as either a receivable or a contract asset. A receivable is a right to consideration that is unconditional (i.e., only the passage of time is required before payment is due). For example, we recognize a receivable for revenues related to our time and materials and transaction or volume-based contracts when earned regardless of whether amounts have been billed. We present such receivables in "Trade accounts receivable, net" in our consolidated statements of financial position at their net estimated realizable value. A contract asset is a right to consideration that is conditional upon factors other than the passage of time. Contract assets are presented in "Other current assets" in our consolidated statements of financial position and primarily relate to unbilled amounts on fixed-price contracts utilizing the cost to cost method of revenue recognition. Our contract liabilities, or deferred revenue, consist of advance payments from clients and billings in excess of revenues recognized. We classify deferred revenue as current or noncurrent based on the timing of when we expect to recognize the revenues. Our contract assets and contract liabilities are reported on a net basis by contract at the end of each reporting period. The difference between the opening and closing balances of our contract assets and contract liabilities primarily results from the timing difference between our performance obligations and the client’s payment. We receive payments from clients based on the terms established in our contracts, which vary by contract type. Allowance for Credit Losses . We calculate expected credit losses for our trade accounts receivable and contract assets. Expected credit losses include losses expected based on known credit issues with specific customers as well as a general expected credit loss allowance based on relevant information, including historical loss rates, current conditions, and reasonable economic forecasts that affect collectibility . We update our allowance for credit losses on a quarterly basis with changes in the allowance recognized in income from operations. Costs to Fulfill. Recurring operating costs for contracts with customers are recognized as incurred. Certain eligible, nonrecurring costs (i.e., set-up or transition costs) are capitalized when such costs (1) relate directly to the contract, (2) generate or enhance resources of the Company that will be used in satisfying the performance obligation in the future, and (3) are expected to be recovered. These costs are expensed ratably over the estimated life of the customer relationship, including expected contract renewals. In determining the estimated life of the customer relationship, we evaluate the average contract term, on a portfolio basis by nature of the services to be provided, and apply judgment in evaluating the rate of technological and industry change. Capitalized amounts are monitored regularly for impairment. Impairment losses are recorded when projected remaining undiscounted operating cash flows are not sufficient to recover the carrying amount of the capitalized costs to fulfill. Stock-Based Compensation. Stock-based compensation expense for awards of equity instruments to employees and non-employee directors is determined based on the grant date fair value of those awards. We recognize these compensation costs net of an estimated forfeiture rate over the requisite service period of the award. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs materially from original estimates. Stock-based compensation costs for PSUs are recognized on a graded-vesting basis over the vesting period based on the most probable outcome of the performance conditions. If the minimum performance targets are not met, no compensation cost is recognized and any recognized compensation cost is reversed, except for awards subject to a market condition. The fair value of RSUs and PSUs is determined based on the number of stock units granted and the quoted price of our stock at the date of grant. The fair value of PSUs granted subject to a market condition is determined using a Monte Carlo valuation model. Foreign Currency. The assets and liabilities of our foreign subsidiaries whose functional currency is not the U.S. dollar are translated into U.S. dollars at current exchange rates while revenues and expenses are translated at average monthly exchange rates. The resulting translation adjustments are recorded in the caption "Accumulated other comprehensive income (loss)" on the consolidated statements of financial position. Foreign currency transactions and balances are those that are denominated in a currency other than the entity’s functional currency. An entity's functional currency is the currency of the primary economic environment in which it operates. The U.S. dollar is the functional currency for some of our foreign subsidiaries. For these subsidiaries, transactions and balances denominated in the local currency are foreign currency transactions. Foreign currency transactions and balances related to non-monetary assets and liabilities are remeasured to the functional currency of the entity at historical exchange rates while monetary assets and liabilities are remeasured to the functional currency of the entity at current exchange rates. Foreign currency exchange gains or losses from remeasurement are included in the caption "Foreign currency exchange gain (losses), net" on our consolidated statements of operations together with gains or losses on our undesignated foreign currency hedges. Derivative Financial Instruments. Derivative financial instruments are recorded on our consolidated statements of financial position as either an asset or liability measured at its fair value as of the reporting date. Our derivative financial instruments consist primarily of foreign exchange forward and option contracts. For derivative financial instruments to qualify for hedge accounting, the following criteria must be met: (1) the hedging instrument must be designated as a hedge; (2) the hedged exposure must be specifically identifiable and must expose us to risk; and (3) it must be expected that a change in fair value of the hedging instrument and an opposite change in the fair value of the hedged exposure will have a high degree of correlation. Changes in our derivatives’ fair values are recognized in net income unless specific hedge accounting and documentation criteria are met (i.e., the instruments are designated and accounted for as hedges). We record the effective portion of the unrealized gains and losses on our derivative financial instruments that are designated as cash flow hedges in the caption "Accumulated other comprehensive income (loss)" in the consolidated statements of financial position. Any ineffectiven ess or excluded portion of a designated cash flow hedge is recognized in net income. U pon occurrence of the hedged transaction, the gains and losses on the derivative are recognized in net income. Income Taxes. We provide for income taxes utilizing the asset and liability method of accounting. Under this method, deferred income taxes are recorded to reflect the tax consequences in future years of differences between the tax basis of assets and liabilities and their financial reporting amounts at each balance sheet date, based on enacted tax laws and statutory tax rates applicable to the periods

Revenues (Notes)

Revenues (Notes)	12 Months Ended
	Dec. 31, 2021
Revenues [Abstract]
Revenue from Contract with Customer [Text Block]	Disaggregation of Revenues The tables below present disaggregated revenues from contracts with clients by client location, service line and contract-type for each of our business segments. We believe this disaggregation best depicts how the nature, amount, timing and uncertainty of our revenues and cash flows are affected by industry, market and other economic factors. Our consulting and technology services include consulting, application development, systems integration, and application testing services as well as software solutions and related services while our outsourcing services include application maintenance, infrastructure and business process services. Revenues are attributed to geographic regions based upon client location, which is the client's billing address. Substantially all revenues in our North America region relate to clients in the United States. Year Ended December 31, 2021 (in millions) FS HC P&R CMT Total Revenues Geography: North America $ 4,204 $ 4,571 $ 2,937 $ 1,924 $ 13,636 United Kingdom 547 168 471 456 1,642 Continental Europe 745 477 539 158 1,919 Europe - Total 1,292 645 1,010 614 3,561 Rest of World 555 121 329 305 1,310 Total $ 6,051 $ 5,337 $ 4,276 $ 2,843 $ 18,507 Service line: Consulting and technology services $ 4,079 $ 3,090 $ 2,725 $ 1,693 $ 11,587 Outsourcing services 1,972 2,247 1,551 1,150 6,920 Total $ 6,051 $ 5,337 $ 4,276 $ 2,843 $ 18,507 Type of contract: Time and materials $ 3,613 $ 2,063 $ 1,785 $ 1,679 $ 9,140 Fixed-price 2,063 2,157 2,085 1,032 7,337 Transaction or volume-based 375 1,117 406 132 2,030 Total $ 6,051 $ 5,337 $ 4,276 $ 2,843 $ 18,507 Year Ended December 31, 2020 (in millions) FS HC P&R CMT Total Revenues Geography: North America $ 4,013 $ 4,181 $ 2,650 $ 1,737 $ 12,581 United Kingdom 463 157 371 344 1,335 Continental Europe 629 434 413 177 1,653 Europe - Total 1,092 591 784 521 2,988 Rest of World 516 80 262 225 1,083 Total $ 5,621 $ 4,852 $ 3,696 $ 2,483 $ 16,652 Service line: Consulting and technology services $ 3,691 $ 2,786 $ 2,249 $ 1,456 $ 10,182 Outsourcing services 1,930 2,066 1,447 1,027 6,470 Total $ 5,621 $ 4,852 $ 3,696 $ 2,483 $ 16,652 Type of contract: Time and materials $ 3,548 $ 1,950 $ 1,548 $ 1,515 $ 8,561 Fixed-price 1,736 1,777 1,741 871 6,125 Transaction or volume-based 337 1,125 407 97 1,966 Total $ 5,621 $ 4,852 $ 3,696 $ 2,483 $ 16,652 Year Ended December 31, 2019 (in millions) FS HC P&R CMT Total Revenues Geography: North America $ 4,137 $ 4,147 $ 2,678 $ 1,764 $ 12,726 United Kingdom 484 130 380 319 1,313 Continental Europe 728 341 453 169 1,691 Europe - Total 1,212 471 833 488 3,004 Rest of World 520 77 259 197 1,053 Total $ 5,869 $ 4,695 $ 3,770 $ 2,449 $ 16,783 Service line: Consulting and technology services $ 3,782 $ 2,564 $ 2,295 $ 1,305 $ 9,946 Outsourcing services 2,087 2,131 1,475 1,144 6,837 Total $ 5,869 $ 4,695 $ 3,770 $ 2,449 $ 16,783 Type of contract: Time and materials $ 3,651 $ 1,845 $ 1,632 $ 1,528 $ 8,656 Fixed-price 1,922 1,635 1,730 803 6,090 Transaction or volume-based 296 1,215 408 118 2,037 Total $ 5,869 $ 4,695 $ 3,770 $ 2,449 $ 16,783 During the fourth quarter of 2021, we reached a settlement agreement with the final customer involved in our previously disclosed proposed exit from a large customer engagement of our Samlink subsidiary and additionally entered into an agreement to sell this subsidiary. We reached settlement agreements with the other two customers to this engagement in the second quarter of 2021. The financial terms of the final settlement agreements with the three customers did not materially differ from our original 2020 offer and, accordingly, the impact to our 2021 consolidated statement of operations was immaterial. In 2020, in connection with our settlement offer, we recorded a reduction of revenues of $118 million and additional expenses of $33 million, primarily related to the impairment of long-lived assets. The sale of our Samlink subsidiary closed on February 1, 2022. Costs to Fulfill The following table presents information related to the capitalized costs to fulfill, such as setup or transition activities . Costs to fulfill are recorded in "Other noncurrent assets" in our consolidated statements of financial position and the amortization expense of costs to fulfill is included in "Cost of revenues" in our consolidated statements of operations. Costs to obtain contracts were immaterial for the period disclosed. (in millions) 2021 2020 Beginning balance $ 467 $ 485 Costs capitalized 56 98 Amortization expense (118) (102) Impairment charge (11) (14) Ending balance $ 394 $ 467 Contract Balances A contract asset is a right to consideration that is conditional upon factors other than the passage of time. Contract assets are presented in "Other current assets" in our consolidated statements of financial position and primarily relate to unbilled amounts on fixed-price contracts utilizing the cost to cost method of revenue recognition. The table below shows significant movements in contract assets: (in millions) 2021 2020 Beginning balance $ 315 $ 334 Revenues recognized during the period but not billed 275 289 Amounts reclassified to trade accounts receivable (280) (308) Ending balance $ 310 $ 315 Our contract liabilities, or deferred revenue, consist of advance payments and billings in excess of revenues recognized. The table below shows significant movements in the deferred revenue balances (current and noncurrent): (in millions) 2021 2020 Beginning balance $ 419 $ 336 Amounts billed but not recognized as revenues 413 368 Revenues recognized related to the beginning balance of deferred revenue (389) (285) Ending balance $ 443 $ 419 Revenues recognized during the year ended December 31, 2021 for performance obligations satisfied or partially satisfied in previous periods were immaterial. Remaining Performance Obligations As of December 31, 2021, the aggregate amount of transaction price allocated to remaining performance obligations, was $1,586 million, of which approximately 80% is expected to be recognized as revenues within 2 years. Disclosure is not required for performance obligations that meet any of the following criteria: (1) contracts with a duration of one year or less as determined under ASC Topic 606 "Revenue from Contracts with Customers" , (2) contracts for which we recognize revenues based on the right to invoice for services performed, (3) variable consideration allocated entirely to a wholly unsatisfied performance obligation or to a wholly unsatisfied promise to transfer a distinct good or service that forms part of a single performance obligation in accordance with ASC 606-10-25-14(b), for which the criteria in ASC 606-10-32-40 have been met, or (4) variable consideration in the form of a sales-based or usage based royalty promised in exchange for a license of intellectual property. Many of our performance obligations meet one or more of these exemptions and therefore are not included in the remaining performance obligation amount disclosed above. Trade Accounts Receivable and Allowance for Credit Losses We calculate expected credit losses for our trade accounts receivable based on historical credit loss rates for each aging category as adjusted for the current market conditions and forecasts about future economic conditions. The following table presents the activity in the allowance for credit losses for the trade accounts receivable: (in millions) 2021 2020 2019 Beginning balance $ 57 $ 67 $ 78 Impact of adoption of the Credit Loss Standard — (1) — Credit loss expense 6 8 (11) Write-offs charged against the allowance (13) (17) — Ending balance $ 50 $ 57 $ 67

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Business Combinations	Acquisitions completed during each of the three years ended December 31, 2021, 2020 and 2019 were not individually or in the aggregate material to our operations. Accordingly, pro forma results have not been presented. We have allocated the purchase price related to these transactions to tangible and intangible assets acquired and liabilities assumed, including goodwill, based on their estimated fair values. The primary items that generated goodwill are the value of the acquired assembled workforces and synergies between the acquired companies and us, neither of which qualify as an identifiable intangible asset. 2021 In 2021, we acquired 100% owners hip in each of the following: • Linium, a cloud transformation consultancy group specializing in the ServiceNow platform and solutions for smart digital enterprise workflows, acquired to broaden our enterprise service management capabilities (acquired January 31, 2021); • Magenic, a provider of agile software and cloud development, DevOps, experience design and advisory services across a range of industries, acquired to enhance our global software engineering expertise (acquired February 1, 2021); • Servian, an Australia-based enterprise transformation consultancy specializing in data analytics, AI, digital services, experience design and cloud, acquired to enhance our digital portfolio and market presence in Australia and New Zealand (acquired April 1, 2021); • ESG Mobility, a digital automotive engineering research and development provider for connected, autonomous and electric vehicles, acquired to expand our digital engineering expertise, particularly in connected vehicles (acquired June 1, 2021); • TQS, a global industrial data and intelligence company, acquired to accelerate our growth in IoT, data and analytics (acquired July 30, 2021). • Hunter, a provider of digital engineering and project management services, acquired to extend our talent network in key markets, expanding our digital engineering resources in the United States (acquired August 16, 2021); and • Devbridge, a software consultancy and product development company, acquired to expand our software product engineering capabilities and global delivery footprint (acquired December 9, 2021). The allocations of preliminary purchase price to the fair value of the assets acquired and li abilities assumed were as follows: (dollars in millions) Devbridge Servian Magenic ESG Mobility Linium Other Total Weighted Average Useful Life Cash $ 7 $ 4 $ 13 $ 28 $ — $ 2 $ 54 Trade accounts receivable 12 15 17 30 5 12 91 Property and equipment and other assets 5 6 4 8 1 4 28 Operating lease assets, net 11 5 10 27 — 1 54 Non-deductible goodwill 41 184 10 26 — 18 279 Tax-deductible goodwill 140 — 137 24 57 10 368 Customer relationship assets 72 77 90 77 24 32 372 9.8 years Other intangible assets — 2 1 — — — 3 3.8 years Current liabilities (11) (12) (29) (22) (2) (7) (83) Noncurrent liabilities (9) (29) (7) (66) — (6) (117) Purchase price, inclusive of contingent consideration $ 268 $ 252 $ 246 $ 132 $ 85 $ 66 $ 1,049 For the year ended December 31, 2021, revenues from acquisitions completed in 2021, since the dates of acquisition, were $301 million. For acquisitions completed in 2021, the allocation of purchase price is preliminary and will be finalized as soon as practicable within the measurement period, but in no event later than one year following the date of acquisition. 2020 In 2020, we acquired 100% ownership in each of the following: • Code Zero, a provider of consulting and implementation services acquired to strengthen our cloud solutions portfolio and Salesforce Configure-Price-Quote and billing capabilities (acquired on January 31, 2020); • Lev, a Salesforce Platinum Partner specializing in digital marketing consultancy and implementation of custom cloud solutions acquired to expand our global Salesforce practice (acquired on March 27, 2020); • EI-Technologies, a digital technology consulting firm and leading Salesforce specialist acquired to expand our global Salesforce practice (acquired on May 29, 2020); • Collaborative Solutions, a provider of Workday enterprise cloud applications for finance and human resources acquired to strengthen our portfolio of cloud offerings (acquired on June 10, 2020); • New Signature, an independent Microsoft public cloud transformation company acquired to expand our hyperscale cloud advisory services and provide the foundation for our dedicated practice centered on Microsoft cloud solutions (acquired on August 18, 2020); • the net assets of Tin Roof, a custom software and digital product development services company acquired to expand our software product engineering footprint in the United States (acquired on September 16, 2020); • 10 th Magnitude, a leading cloud specialist focused on the Microsoft Azure cloud computing platform acquired to expand our Microsoft Azure expertise (acquired on September 30, 2020); • the net assets of Bright Wolf, a technology service provider specializing in customer Industrial IoT solutions acquired to expand our smart products offering and expertise in architecting and implementing Industrial IoT solutions (acquired on November 2, 2020); and • Inawisdom, an Amazon Web Services consulting partner with expertise in AI, machine learning, and data analytics acquired to expand our client services in Europe and strengthen our end-to-end cloud-native AI and machine learning solutions portfolio (acquired on December 18, 2020). The allocations of purchase price to the fair value of the assets acquired and liabilities assumed were as follows: (dollars in millions) Collaborative Solutions New Signature Tin Roof 10th Magnitude Others Total Weighted Average Useful Life Cash $ 10 $ 13 $ — $ 2 $ 10 $ 35 Trade accounts receivable 38 13 10 7 21 89 Property and equipment and other assets 6 6 1 2 15 30 Operating lease assets, net 6 7 2 4 13 32 Non-deductible goodwill 44 292 — 90 66 492 Deductible goodwill 281 — 86 39 92 498 Customer relationship intangible assets 37 8 69 10 21 145 9.8 years Other intangible assets 8 1 — — 2 11 5.4 years Current liabilities (25) (20) (13) (15) (23) (96) Noncurrent liabilities (5) (8) (2) (5) (15) (35) Purchase price, inclusive of contingent consideration (1) $ 400 $ 312 $ 153 $ 134 $ 202 $ 1,201 (1) The purchase price for our acquisitions includes contingent consideration components with a collective maximum payout of $59 million, valued at $42 million at the date of acquisition, which is contingent upon achieving certain performance thresholds during the first two calendar years following the date of acquisition. For the year ended December 31, 2020, revenues from acquisitions completed in 2020, since the dates of acquisition, were $222 million.

Restructuring Charges

Restructuring Charges	12 Months Ended
	Dec. 31, 2021
Restructuring Charges [Abstract]
Realignment Charges	During 2020 and 2019, we incurred costs related to both our realignment program and our 2020 Fit for Growth Plan. Our realignment program, which began in 2017, improved our client focus, cost structure and the efficiency and effectiveness of our delivery while continuing to drive revenue growth. Our 2020 Fit for Growth Plan, which began in the fourth quarter of 2019, simplified our organizational model and optimized our cost structure in order to partially fund the investments required to execute on our strategy and advance our growth agenda and included our decision to exit certain content-related services that were not in line with our strategic vision for the Company. The total costs related to our realignment program and our 2020 Fit for Growth Plan are reported in "Restructuring charges" in our consolidated statements of operations. We do not allocate these charges to individual segments in internal management rep orts used by the chief operating decision maker. Accordingly, such expenses are included in our segment reporting as “unallocated costs”. See Note 18 .

Investments

Investments	12 Months Ended
	Dec. 31, 2021
Investments [Abstract]
Investments	Our investments were as follows as of December 31: (in millions) 2021 2020 Short-term investments: Equity investment security $ 26 $ 27 Available-for-sale investment securities 310 — Held-to-maturity investment securities 37 14 Time deposits 554 3 Total short-term investments $ 927 $ 44 Long-term investments: Other investments $ 66 $ 35 Restricted time deposits (1) 397 405 Total long-term investments $ 463 $ 440 (1) See Note 11 . Equity Investment Security Our equity investment security is a U.S. dollar denominated investment in a fixed income mutual fund. Realized and unrealized gains and losses were immaterial for the years ended December 31, 2021, 2020 and 2019. Available-for-Sale Investment Securities Our available-for-sale investment securities consist of highly rated U.S. dollar denominated investments in commercial paper maturing within one year. As of December 31, 2021, the amortized cost and fair value of our available-for-sale investments were $310 million. Unrealized gains and losses were immaterial as of December 31, 2021. Proceeds from sales of available-for-sale investment securities and the gross gains and losses that have been included in earnings as a result of those sales were as follows: (in millions) 2021 2020 2019 Proceeds from sales of available-for-sale investment securities $ — $ — $ 1,712 Gross gains $ — $ — $ 6 Gross losses — — (5) Net realized gains on sales of available-for-sale investment securities $ — $ — $ 1 Held-to-Maturity Investment Securities Our held-to-maturity investment securities consist of Indian rupee denominated investments primarily in commercial paper and international corporate bonds. Our investment guidelines are to purchase securities that are investment grade at the time of acquisition. The basis for the measurement of fair value of our held-to-maturity investments is Level 2 in the fair value hierarchy. The amortized cost and fair value of held-to-maturity investment securities were as follows as of December 31: 2021 2020 (in millions) Amortized Fair Amortized Fair Short-term investments, due within one year: Corporate and other debt securities $ 17 $ 17 $ 14 $ 14 Commercial paper 20 20 — — Total held-to-maturity investments $ 37 $ 37 $ 14 $ 14 As of December 31, 2021, corporate and other debt securities in the amount of $17 million and commercial paper in the amount of $10 million were in an unrealized loss position. The total unrealized loss was less than $1 million and none of the securities had been in an unrealized loss position for longer than 12 months. As of December 31, 2020, there were no held-to-maturity investment securities in an unrealized loss position. The securities in our portfolio are highly rated and short-term in nature. As of December 31, 2021, our corporate and other debt securities were rated AA+ or better and our commercial paper securities were rated A-1+ by CRISIL, an Indian subsidiary of S&P Global. Other Investments As of December 31, 2021 and 2020, we had equity method investments of $63 million and $31 million, respectively, primarily related to an investment in the technology sector. As of December 31, 2021 and 2020, we had equity securities without a readily determinable fair value of $3 million and $4 million, respectively. During 2019, as a result of events indicating one of our equity method investments, valued at $66 million as of December 31, 2018, experienced an other-than-temporary impairment, we assessed its fair value and determined that the carrying value exceeded the fair value. As such, we recorded an impairment charge of $57 million in the fourth quarter of 2019 within the caption "Income (loss) from equity method investments" in our consolidated statement of operations. In determining the fair value of the equity method investment, we considered results from the following valuation methodologies: income approach, based on discounted future cash flows, market approach, based on current market multiples and net asset value approach, based on the assets and liabilities of the investee.

Property and Equipment, net

Property and Equipment, net	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment, Net [Abstract]
Property and Equipment, net	Property and equipment were as follows as of December 31: Estimated Useful Life 2021 2020 (in years) (in millions) Buildings 30 $ 777 $ 783 Computer equipment 3 – 5 638 636 Computer software 3 – 8 926 840 Furniture and equipment 5 – 9 772 761 Land 7 7 Capital work-in-progress 116 122 Leasehold improvements Shorter of the lease term or 431 424 Sub-total 3,667 3,573 Accumulated depreciation and amortization (2,496) (2,322) Property and equipment, net $ 1,171 $ 1,251 Depreciation and amortization expense related to property and equipment was $392 million, $407 million and $363 million for the years ended December 31, 2021, 2020 and 2019, respectively. The gross amount of property and equipment recorded under finance leases was $24 million and $37 million as of December 31, 2021 and 2020, respectively. Accumulated amortization for our ROU finance lease assets was $17 million and $23 million as of December 31, 2021 and 2020, respectively. Amortization expense related to our ROU finance lease assets was $7 million, $7 million, and $11 million for the years ended December 31, 2021, 2020, and 2019 respectively. The gross amount of property and equipment recorded for software to be sold, leased or marketed reported in the caption "Computer software" above was $201 million and $159 million as of December 31, 2021 and 2020, respectively. Accumulated amortization for software to be sold, leased or marketed was $106 million and $73 million as of December 31, 2021 and 2020, respectively. Amortization expense for software to be sold, leased or marketed recorded as property and equipment was $33 million , $30 million and $22 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Leases (Notes)

Leases (Notes)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Lessee, Operating Leases [Text Block]	The following table provides information on the components of our operating and finance leases included in our consolidated statement of financial position as of December 31: Leases Location on Statement of Financial Position 2021 2020 Assets (in millions) ROU operating lease assets Operating lease assets, net $ 933 $ 1,013 ROU finance lease assets Property and equipment, net 7 14 Total $ 940 $ 1,027 Liabilities Current Operating lease Operating lease liabilities $ 195 $ 211 Finance lease Accrued expenses and other current liabilities 8 11 Noncurrent Operating lease Operating lease liabilities, noncurrent 783 846 Finance lease Other noncurrent liabilities 5 11 Total $ 991 $ 1,079 For the years ended December 31, 2021, 2020 and 2019, our operating lease costs were $293 million, $302 million and $264 million, respectively, including variable lease costs of $10 million, $14 million and $18 million, respectively. Our short- term lease rental expense was $22 million, $20 million and $16 million for the years ended December 31, 2021, 2020 and 2019, respectively. Lease interest expense related to our finance leases for years ended December 31, 2021, 2020 and 2019 was immaterial. The following table provides information on the weighted average remaining lease term and weighted average discount rate for our operating leases as of December 31: Operating Lease Term and Discount Rate 2021 2020 Weighted average remaining lease term 6.5 years 6.2 years Weighted average discount rate 5.4 % 5.7 % The following table provides supplemental cash flow and non-cash information related to our operating leases as of December 31: (in millions) 2021 2020 2019 Cash paid for amounts included in the measurement of operating lease liabilities $ 274 $ 271 $ 232 ROU assets obtained in exchange for operating lease liabilities 100 273 274 Cash paid for amounts included in the measurement of finance lease liabilities and ROU assets obtained in exchange for finance lease liabilities were each immaterial for the years ended December 31, 2021, 2020 and 2019. The following table provides the schedule of maturities of our operating lease liabilities and a reconciliation of the undiscounted cash flows to the operating lease liabilities recognized in the statement of financial position as of December 31: (in millions) 2021 2022 $ 241 2023 197 2024 161 2025 138 2026 112 Thereafter 318 Total operating lease payments 1,167 Interest (189) Total operating lease liabilities $ 978 As of December 31, 2021, we had $88 million of additional obligations related to operating leases whose lease term had yet to commence and which are therefore not included in our statement of financial position. These leases are primarily related to real estate and will commence in various months in 2022 and 2023 with lease terms of 1 year to 15 years.

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, net	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, net	Changes in goodwill by our reportable segments were as follows for the years ended December 31, 2021 and 2020: Segment January 1, 2021 Goodwill Additions and Adjustments Foreign Currency Translation Adjustments December 31, 2021 (in millions) Financial Services $ 932 $ 198 $ (21) $ 1,109 Healthcare 2,755 84 (8) 2,831 Products and Resources 780 200 (13) 967 Communications, Media and Technology 564 156 (7) 713 Total goodwill $ 5,031 $ 638 $ (49) $ 5,620 Segment January 1, 2020 Goodwill Additions and Adjustments Foreign Currency Translation Adjustments December 31, 2020 (in millions) Financial Services $ 700 $ 204 $ 28 $ 932 Healthcare 2,595 149 11 2,755 Products and Resources 417 346 17 780 Communications, Media and Technology 267 289 8 564 Total goodwill $ 3,979 $ 988 $ 64 $ 5,031 Based on our most recent goodwill impairment assessment performed as of October 31, 2021, we concluded that the goodwill in each of our reporting units was not at risk of impairment. We have not recognized any impairment losses on our goodwill. Components of intangible assets were as follows as of December 31: 2021 2020 (in millions) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Customer relationships $ 1,679 $ (610) $ 1,069 $ 1,333 $ (490) $ 843 Developed technology 385 (330) 55 388 (286) 102 Indefinite lived trademarks 72 — 72 72 — 72 Finite lived trademarks and other 81 (59) 22 80 (51) 29 Total intangible assets $ 2,217 $ (999) $ 1,218 $ 1,873 $ (827) $ 1,046 Other than certain trademarks with indefinite lives, our intangible assets have finite lives and, as such, are subject to amortization. Amortization of intangible assets totaled $182 million for 2021, $152 million for 2020 and $162 million for 2019. The following table provides the estimated amortization expense related to our existing intangible assets for the next five years. (in millions) Estimated Amortization 2022 $ 186 2023 144 2024 139 2025 136 2026 132

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Dec. 31, 2021
Accrued Expenses And Other Current Liabilities [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities were as follows as of December 31: (in millions) 2021 2020 Compensation and benefits $ 1,601 $ 1,607 Customer volume and other incentives 242 266 Income taxes 74 34 Professional fees 220 143 Other 395 469 Total accrued expenses and other current liabilities $ 2,532 $ 2,519

Debt

Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt	In 2018, we entered into a Credit Agreement providing for a $750 million Term Loan and a $1,750 million uns ecured revolving credit facility, which are due to mature in November 2023. We are required under the Credit Agreement to make scheduled quarterly principal payments on the Term Loan. The Credit Agreement requires interest to be paid, at our option, at either the ABR, the Eurocurrency Rate or the Daily Simple RFR (each as defined in the Credit Agreement), plus, in each case, an Applicable Margin (as defined in the Credit Agreement). Initially, the Applicable Margin is 0.875% with respect to Eurocurrency Rate and Daily Simple RFR and 0.00% with respect to ABR loans. Subsequently, the Applicable Margin with respect to Eurocurrency Rate and Daily Simple RFR may range from 0.75% to 1.125%, depending on our public debt ratings (or, if we have not received public debt ratings, from 0.875% to 1.125%, depending on our Leverage Ratio, which is the ratio of indebtedness for borrowed money to Consolidated EBITDA, as defined in the Credit Agreement). The Term Loan is a Eurocurrency loan. As the interest rates on our Term Loan and any notes outstanding under the revolving credit facility are variable, the fair value of our debt balances approximates their carrying value as of December 31, 2021 and 2020. Under the Credit Agreement, we are required to pay commitment fees on the unused portion of the revolving credit facility, which vary based on our public debt ratings (or, if we have not received public debt ratings, on the Leverage Ratio). The Credit Agreement contains customary affirmative and negative covenants as well as a financial covenant. The financial covenant is tested at the end of each fiscal quarter and requires us to maintain a Leverage Ratio, which is the ratio of indebtedness for borrowed money to Consolidated EBITDA, as defined in the Credit Agreement, not in excess of 3.50 to 1.00, or for a period of up to four quarters following certain material acquisitions, 3.75 to 1.00. We were in compliance with all debt covenants and representations of the Credit Agreement as of December 31, 2021. In February 2021, our India subsidiary renewed its 13 billion Indian rupee ($175 million at the December 31, 2021 exchange rate) working capital facility, which requires us to repay any balances within 90 days from the date of disbursement. There is a 1.0% prepayment penalty applicable to payments made within 30 days of disbursement. This working capital facility contains affirmative and negative covenants and may be renewed annually in February. As of December 31, 2021, we have not borrowed funds under this facility. Short-term Debt As of both December 31, 2021 and December 31, 2020, we had $38 million of short-term debt related to current maturities of our Term Loan, with a weighted average interest rate of 1.0% in both periods. Long-term Debt The following summarizes our long-term debt balances as of December 31: (in millions) 2021 2020 Term Loan $ 666 $ 703 Less: Current maturities (38) (38) Deferred financing costs (2) (2) Long-term debt, net of current maturities $ 626 $ 663 The following represents the schedule of maturities of our term loan: Year Amounts (in millions) 2022 $ 38 2023 628 Total $ 666

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income before provision for income taxes shown below is based on the geographic location to which such income was attributed for years ended December 31: (in millions) 2021 2020 2019 United States $ 818 $ 814 $ 931 Foreign 2,009 1,282 1,612 Income before provision for income taxes $ 2,827 $ 2,096 $ 2,543 The provision for income taxes consisted of the following components for the years ended December 31: (in millions) 2021 2020 2019 Current: Federal and state $ 210 $ 137 $ 549 Foreign 456 383 400 Total current provision 666 520 949 Deferred: Federal and state (50) (77) (320) Foreign 77 261 14 Total deferred provision (benefit) 27 184 (306) Total provision for income taxes $ 693 $ 704 $ 643 In the third quarter of 2020, we reversed our indefinite reinvestment assertion on Indian earnings accumulated in prior years and recorde d a $140 million Tax on Accumulated Indian Earnings. The recorded income tax expense reflects the India withholding tax on unrepatriated Indian earnings, which were $5.2 billion as of December 31, 2019, net of applicable U.S. foreign tax credits. We are involved in two separate ongoing disputes with the ITD in connection with previously disclosed share repurchase transactions undertaken by CTS India in 2013 and 2016 to repurchase shares from its shareholders (non-Indian Cognizant entities) valued at $523 million and $2.8 billion, respectively. The 2016 transaction was undertaken pursuant to a plan approved by the High Court in Chennai, India, and resulted in the payment of $135 million in Indian income taxes - an amount we believe includes all the applicable taxes owed for this transaction under Indian law. In March 2018, the ITD asserted that it is owed an additional 33 billion Indian rupees ($443 million at the December 31, 2021 exchange rate) on the 2016 transaction. We deposited 5 billion Indian rupees, representing 15% of the disputed tax amount related to the 2016 transaction, with the ITD. As of December 31, 2021 and 2020, the deposit with the ITD was $67 million and $68 million, respectively, presented in "Other noncurrent assets" in our consolidated statements of financial position. Additionally, certain time deposits of CTS India were placed under lien in favor of the ITD, representing the remainder of the disputed tax amount. As of December 31, 2021 and 2020, the balance of deposits under lien was 30 billion Indian rupees, including previously earned interest, or $397 million and $405 million, respectively, as presented in "Long-term investments" in our consolidated statements of financial position. We are currently in litigation with the ITD on the 2016 share repurchase transaction dispute. More recently, in April 2020, we received a formal assessment from the ITD, which is consistent with its previous assertions regarding our 2016 transaction. In June 2020, we filed an appeal against this assessment. The dispute in relation to the 2013 share repurchase transaction is also in litigation. At this time, the ITD has not made specific demands with regards to the 2013 share repurchase transaction. We believe we have paid all applicable taxes owed on both the 2016 and the 2013 transactions. Accordingly, we have not recorded any reserves for these matters as of December 31, 2021. The reconciliation between the U.S. federal statutory rate and our effective income tax rate were as follows for the years ended December 31: (Dollars in millions) 2021 % 2020 % 2019 % Tax expense, at U.S. federal statutory rate $ 594 21.0 $ 440 21.0 $ 534 21.0 State and local income taxes, net of federal benefit 50 1.8 52 2.5 59 2.3 Non-taxable income for Indian tax purposes (36) (1.3) (48) (2.3) (90) (3.5) Rate differential on foreign earnings 137 4.8 178 8.5 145 5.7 Net impact related to the India Tax Law — — — — 21 0.8 Recognition of benefits related to uncertain tax positions (14) (0.5) — — — — Credits and other incentives (42) (1.5) (51) (2.4) (57) (2.2) Reversal of indefinite reinvestment assertion — — 140 6.6 — — Other 4 0.2 (7) (0.3) 31 1.2 Total provision for income taxes $ 693 24.5 $ 704 33.6 $ 643 25.3 The significant components of deferred income tax assets and liabilities recorded on the consolidated statements of financial position were as follows as of December 31: (in millions) 2021 2020 Deferred income tax assets: Net operating losses $ 52 $ 36 Revenue recognition 116 41 Compensation and benefits 230 259 MAT and credit carryforwards 27 109 Expenses not currently deductible 121 147 546 592 Less: valuation allowance (46) (29) Deferred income tax assets, net 500 563 Deferred income tax liabilities: Depreciation and amortization 202 198 Deferred costs 84 105 Other 28 21 Deferred income tax liabilities 314 324 Net deferred income tax assets $ 186 $ 239 At December 31, 2021, we had foreign and U.S. net operating loss carryforwards of approximately $117 million and $114 million, respectively. We have recorded valuation allowances on certain net operating loss carryforwards. As of December 31, 2021 and 2020, deferred income tax assets related to the MAT carryforwards were $16 million and $98 million, respectively. The calculation of the MAT includes all profits realized by our Indian subsidiaries and any MAT paid is creditable against future corporate income tax, subject to certain limitations. Our Indian subsidiaries are primarily export-oriented and are eligible for certain income tax holiday benefits granted by the government of India for export activities conducted within SEZs for periods of up to 15 years. Our SEZ income tax holiday benefits are currently scheduled to expire in whole or in part through the year 2028 and may be extended on a limited basis for an additional five years per unit if certain reinvestment criteria are met. Our Indian profits ineligible for SEZ benefits are subject to corporate income tax at the rate of 34.94%. In addition, all Indian profits, including those generated within SEZs, are subject to the MAT. The current rate of MAT is 17.47%. For the years ended December 31, 2021, 2020 and 2019, the effect of the income tax holidays granted by the Indian government was to reduce the overall income tax provision and increase net income by $36 million, $48 million and $90 million, respectively, and increase diluted EPS by $0.07, $0.09 and $0.16, respectively. In December 2019, the Government of India enacted the India Tax Law effective retroactively to April 1, 2019 that enables Indian companies to elect to be taxed at a lower income tax rate of 25.17%, as compared to the current income tax rate of 34.94%. Once a company elects into the lower income tax rate, a company may not benefit from any tax holidays associated with SEZs and certain other tax incentives, including MAT carryforwards, and may not reverse its election. While our existing MAT carryforwards expire between March 2027 and March 2032, we expect to fully or substantially utilize our existing MAT carryforwards prior to the start of the new India fiscal year on April 1, 2022. Our current intent is to elect into the new tax regime once our MAT carryforwards are fully or substantially utilized. As a result of the enactment of the India Tax Law, we recorded a one-time net income tax expense of $21 million in 2019, due to the revaluation to the lower income tax rate of our India net deferred income tax assets that are expected to reverse after we expect to elect into the new tax regime. We conduct business globally and file income tax returns in the United States, including federal and state, as well as various foreign jurisdictions. In 2021, we reached an agreement with the IRS, which settled tax years 2012 through 2016. As a result of this settlement, in the first quarter of 2021, we recorded a $14 million discrete benefit to the provision for income taxes. Tax years that remain subject to examination by the IRS are 2017 and onward, and years that remain subject to examination by state authorities vary by state. Years under examination by foreign tax authorities a r e 2001 an d onward. In addition, transactions between our affiliated entities are arranged in accordance with applicable transfer pricing laws, regulations and relevant guidelines. As a result, and due to the interpretive nature of certain aspects of these laws and guidelines, we have pending applications for APAs before the taxing authorities in some of our most significant jurisdictions. We record incremental tax expense, based upon the more-likely-than-not standard, for any uncertain tax positions. In addition, when applicable, we adjust the previously recorded income tax expense to reflect examination results when the position is effectively settled or otherwise resolved. Our ongoing evaluations of the more-likely-than-not outcomes of the examinations and related tax positions require judgment and can result in adjustments that increase or decrease our effective income tax rate, as well as impact our operating results. The specific timing of when the resolution of each tax position will be reached is uncertain. Changes in unrecognized income tax benefits were as follows for the years ended December 31: (in millions) 2021 2020 2019 Balance, beginning of year $ 193 $ 152 $ 117 Additions based on tax positions related to the current year 34 28 22 Additions for tax positions of prior years 16 10 14 Additions for tax positions of acquired subsidiaries 12 3 — Reductions for tax positions due to lapse of statutes of limitations (17) — — Reductions for tax positions of prior years — — (1) Settlements (43) — — Foreign currency exchange movement (1) — — Balance, end of year $ 194 $ 193 $ 152 The unrecognized income tax benefits would affect our effective income tax rate, if recognized. While the Company believes uncertain tax positions may be settled or resolved within the next twelve months, it is difficult to estimate the income tax impact of these potential resolutions at this time. We recognize accrued interest and any penalties associated with uncertain tax positions as part of our provision for income taxes. The total amount of accrued interest and penalties at December 31, 2021 and 2020 was $30 million and $22 million, respectively, and relates to U.S. and foreign tax matters. The amounts of interest and penalties recorded in the provision for income taxes in 2021, 2020 and 2019 were immaterial.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	In the normal course of business, we use foreign exchange forward and option contracts to manage foreign currency exchange rate risk. Derivatives may give rise to credit risk from the possible non-performance by counterparties. Credit risk is limited to the fair value of those contracts that are favorable to us. We have limited our credit risk by limi ting the amount of credit exposure with any one financial institution and conducting ongoing evaluation of the creditworthiness of the financial institutions with which we do business. In addition, all the assets and liabilities related to our foreign exchange derivative contracts set forth in the below table are subject to master netting arrangements, such as the International Swaps and Derivatives Association Master Agreement, with each individual counterparty. These master netting arrangements generally provide for net settlement of all outstanding contracts with the counterparty in the case of an event of default or a termination event. We have presented all the assets and liabilities related to our foreign exchange derivative contracts, as applicable, on a gross basis, with no offsets, in our consolidated statements of financial position. There is no financial collateral (including cash collateral) posted or received by us related to our foreign exchange derivative contracts. The following table provides information on the location and fair values of derivative financial instruments included in our consolidated statements of financial position as of December 31: (in millions) 2021 2020 Designation of Derivatives Location on Statement of Assets Liabilities Assets Liabilities Foreign exchange forward and option contracts – Designated as cash flow hedging instruments Other current assets $ 51 $ — $ 45 $ — Other noncurrent assets 15 — 26 — Total 66 — 71 — Foreign exchange forward contracts - Not designated as cash flow hedging instruments Other current assets 3 — 1 — Accrued expenses and other current liabilities — 7 — 1 Total 3 7 1 1 Total $ 69 $ 7 $ 72 $ 1 Cash Flow Hedges We have entered into a series of foreign exchange derivative contracts that are designated as cash flow hedges of Indian rupee denominated payments in India. These contracts are intended to partially offset the impact of movement of the Indian rupee against the U.S. dollar on future operating costs and are scheduled to mature each month during 2022 and 2023. The changes in fair value of these contracts are initially reported in "Accumulated other comprehensive income (loss)" in our consolidated statements of financial position and are subsequently reclassified to earnings within "Cost of revenues" and "Selling, general and administrative expenses" in our consolidated statements of operations in the same period that the forecasted Indian rupee denominated payments are recorded in earnings. As of December 31, 2021, we estimate that $45 million , net of tax, of the net gains relate d to derivatives designated as cash flow hedges reported in the caption "Accumulated other comprehensive income (loss)" in our consolidated statements of financial position is expected to be reclassified into earnings within the next 12 months. The notional value of our outstanding contracts by year of maturity was as follows as of December 31: (in millions) 2021 2020 2021 $ — $ 1,470 2022 1,643 803 2023 880 — Total notional value of contracts outstanding (1) $ 2,523 $ 2,273 (1) Includes $78 million and $133 million notional value of option contracts as of December 31, 2021 and 2020, with the remaining notional value related to forward contracts. The following table provides information on the location and amounts of pre-tax gains on our cash flow hedges for the year ended December 31: (in millions) Change in Location of Net Derivative Net Gains Reclassified 2021 2020 2021 2020 Foreign exchange forward and option contracts – Designated as cash flow hedging instruments $ 67 $ 39 Cost of revenues $ 55 $ 3 Selling, general and administrative expenses 8 — Total $ 63 $ 3 The activity related to the change in net unrealized gains on our cash flow hedges included in "Accumulated other comprehensive income (loss)" in our consolidated statements of stockholders' equity is presented in Note 14 . Other Derivatives We use foreign exchange forward contracts to provide an economic hedge against balance sheet exposures to certain monetary assets and liabilities denominated in currencies other than the functional currency of our foreign subsidiaries. We entered into foreign exchange forward contracts that are scheduled to mature in 2022. Realized gains or losses and changes in the estimated fair value of these derivative financial instruments are recorded in the caption "Foreign currency exchange gains (losses), net" in our consolidated statements of operations. Additional information related to our outstanding foreign exchange forward contracts not designated as hedging instruments was as follows as of December 31: (in millions) 2021 2020 Notional Fair Value Notional Fair Value Contracts outstanding $ 847 $ (4) $ 637 $ — The following table provides information on the location and amounts of realized and unrealized pre-tax gains (losses) on our other derivative financial instruments for the year ended December 31: (in millions) Location of Net Gains (Losses) Amount of Net Gains (Losses) 2021 2020 Foreign exchange forward contracts - Not designated as hedging instruments Foreign currency exchange gains (losses), net $ 13 $ (63) The related cash flow impacts of all of our derivative activities are reflected as cash flows from operating activities.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	We measure our cash equivalents, certain investments, contingent consideration liabilities and foreign exchange forward and option contracts at fair value. Fair value is the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The fair value hierarchy is based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels: • Level 1 – Inputs are quoted prices in active markets for identical assets or liabilities. • Level 2 – Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data. • Level 3 – Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable. The following table summarizes our financial assets and (liabilities) measured at fair value on a recurring basis as of December 31, 2021: (in millions) Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 507 $ — $ — $ 507 Time deposits — 4 — 4 Commercial paper — 266 — 266 Short-term investments: Time deposits — 554 — 554 Equity investment security 26 — — 26 Available-for-sale investment securities: Commercial paper — 310 — 310 Other current assets Foreign exchange forward and option contracts — 54 — 54 Long-term investments: Restricted time deposits (1) — 397 — 397 Other noncurrent assets Foreign exchange forward contracts — 15 — 15 Accrued expenses and other current liabilities: Foreign exchange forward contracts — (7) — (7) Contingent consideration liabilities — — (14) (14) Other noncurrent liabilities Contingent consideration liabilities — — (21) (21) (1) See Note 11 . The following table summarizes our financial assets and (liabilities) measured at fair value on a recurring basis as of December 31, 2020: (in millions) Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 209 $ — $ — $ 209 Time Deposits — 203 — 203 Commercial Paper — 200 — 200 Short-term investments: Time deposits — 3 — 3 Equity investment security 27 — — 27 Other current assets: Foreign exchange forward and option contracts — 46 — 46 Long-term investments Restricted time deposits (1) — 405 — 405 Other noncurrent assets: Foreign exchange forward and option contracts — 26 — 26 Accrued expenses and other current liabilities: Foreign exchange forward contracts — (1) — (1) Contingent consideration liabilities — — (11) (11) Other noncurrent liabilities: Contingent consideration liabilities — — (43) (43) (1) See Note 11 The following table summarizes the changes in Level 3 contingent consideration liabilities: (in millions) 2021 2020 Beginning balance $ 54 $ 38 Initial measurement recognized at acquisition 24 42 Change in fair value recognized in SG&A expenses (30) (23) Payments and other adjustments (13) (3) Ending balance $ 35 $ 54 We measure the fair value of money market funds based on quoted prices in active markets for identical assets and measure the fair value of our equity security based on the published daily net asset value at which investors can freely subscribe to or redeem from the fund. The fair value of commercial paper is measured based on relevant trade data, dealer quotes, or model-driven valuations using significant inputs derived from or corroborated by observable market data, such as yield curves and credit spreads. The carrying value of the time deposits approximated fair value as of December 31, 2021 and 2020. We estimate the fair value of each foreign exchange forward contract by using a present value of expected cash flows model. This model calculates the difference between the current market forward price and the contracted forward price for each foreign exchange contract and applies the difference in the rates to each outstanding contract. The market forward rates include a discount and credit risk factor. We estimate the fair value of each foreign exchange option contract by using a variant of the Black-Scholes model. This model uses present value techniques and reflects the time value and intrinsic value based on observable market rates. We estimate the fair value of our contingent consideration liabilities associated with our acquisitions using a variation of the income approach, which utilizes one or more significant inputs that are unobservable. This approach calculates the fair value of such liabilities based on the probability-weighted expected performance of the acquired entity against the target performance metric, discounted to present value when appropriate. During the years ended December 31, 2021, 2020 and 2019 there were no transfers among Level 1, Level 2 or Level 3 financial assets and liabilities.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income	Changes in "Accumulated other comprehensive income (loss)" by component were as follows for the year ended December 31, 2021: 2021 (in millions) Before Tax Tax Net of Tax Foreign currency translation adjustments: Beginning balance $ 56 $ (1) $ 55 Change in foreign currency translation adjustments (78) 3 (75) Ending balance $ (22) $ 2 $ (20) Unrealized gains on cash flow hedges: Beginning balance $ 67 $ (12) $ 55 Unrealized gains arising during the period 67 (13) 54 Reclassifications of net (gains) to: Cost of revenues (55) 10 (45) SG&A expenses (8) 1 (7) Net change 4 (2) 2 Ending balance $ 71 $ (14) $ 57 Accumulated other comprehensive income (loss): Beginning balance $ 123 $ (13) $ 110 Other comprehensive income (loss) (74) 1 (73) Ending balance $ 49 $ (12) $ 37 Changes in "Accumulated other comprehensive income (loss)" by component were as follows for the years ended December 31, 2020 and 2019: 2020 2019 (in millions) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Foreign currency translation adjustments: Beginning balance $ (63) $ (1) $ (64) $ (108) $ 5 $ (103) Change in foreign currency translation adjustments 119 — 119 45 (6) 39 Ending balance $ 56 $ (1) $ 55 $ (63) $ (1) $ (64) Unrealized (losses) on available-for-sale investment securities: Beginning balance $ — $ — $ — $ (12) $ 4 $ (8) Net unrealized gains arising during the period — — — 13 (4) 9 Reclassification of net (gains) to Other, net — — — (1) — (1) Net change — — — 12 (4) 8 Ending balance $ — $ — $ — $ — $ — $ — Unrealized gains (losses) on cash flow hedges: Beginning balance $ 31 $ (5) $ 26 $ (4) $ 1 $ (3) Unrealized gains arising during the period 39 (8) 31 39 (7) 32 Reclassifications of net (gains) to: Cost of revenues (3) 1 (2) (3) 1 (2) SG&A expenses — — — (1) — (1) Net change 36 (7) 29 35 (6) 29 Ending balance $ 67 $ (12) $ 55 $ 31 $ (5) $ 26 Accumulated other comprehensive income (loss): Beginning balance $ (32) $ (6) $ (38) $ (124) $ 10 $ (114) Other comprehensive income (loss) 155 (7) 148 92 (16) 76 Ending balance $ 123 $ (13) $ 110 $ (32) $ (6) $ (38)

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	We are involved in various claims and legal proceedings arising in the ordinary course of business. We accrue a liability when a loss is considered probable and the amount can be reasonably estimated. When a material loss contingency is reasonably possible but not probable, we do not record a liability, but instead disclose the nature and the amount of the claim, and an estimate of the loss or range of loss, if such an estimate can be made. Legal fees are expensed as incurred. While we do not expect that the ultimate resolution of any existing claims and proceedings (other than the specific matters described below, if decided adversely), individually or in the aggregate, will have a material adverse effect on our financial position, an unfavorable outcome in some or all of these proceedings could have a material adverse impact on results of operations or cash flows for a particular period. This assessment is based on our current understanding of relevant facts and circumstances. As such, our view of these matters is subject to inherent uncertainties and may change in the future. On January 15, 2015, Syntel sued TriZetto and Cognizant in the USDC-SDNY. Syntel’s complaint alleged breach of contract against TriZetto, and tortious interference and misappropriation of trade secrets against Cognizant and TriZetto, stemming from Cognizant’s hiring of certain former Syntel employees. Cognizant and TriZetto countersued on March 23, 2015, for breach of contract, misappropriation of trade secrets and tortious interference, based on Syntel’s misuse of TriZetto confidential information and abandonment of contractual obligations. Cognizant and TriZetto subsequently added federal D efend Trade Secrets Act and copyright infringement claims for Syntel’s misuse of TriZetto’s proprietary technology. The parties’ claims were narrowed by the court and the case was tried before a jury, which on October 27, 2020, returned a verdict in favor of Cognizant in the amount of $855 million, including $570 million in punitive damages. On April 20, 2021, the USDC-SDNY issued a post-trial order that, among other things, affirmed the jury’s award of $285 million in actual damages, but r educed the award of punitive damages from $570 million to $285 million, thereby reducing the overall damages award from $855 million to $570 million. The USDC-SDNY subsequently issued a final judgment consistent with the April 20 th order. On May 26, 2021, Syntel filed a notice of appeal to the Second Circuit, and on June 3, 2021 the USDC-SDNY stayed execution of judgment pending appeal. The appeal is pending before the Second Circuit. We will not record the gain in our financial statements until it becomes realizable. On February 28, 2019, a ruling of the SCI interpreting the India Defined Contribution Obligation altered historical understandings of the obligation, extending it to cover additional portions of the employee’s income. As a result, the ongoing contributions of our affected employees and the Company were required to be increased. In the first quarter of 2019, we accrued $117 million with respect to prior periods, assuming retroactive application of the Supreme Court’s ruling, in "Selling, general and administrative expenses" in our consolidated statement of operations. There is significant uncertainty as to how the liability should be calculated as it is impacted by multiple variables, including the period of assessment, the application with respect to certain current and former employees and whether interest and penalties may be assessed. Since the ruling, a variety of trade associations and industry groups have advocated to the Indian government, highlighting the harm to the information technology sector, other industries and job growth in India that would result from a retroactive application of the ruling. It is possible the Indian government will review the matter and there is a substantial question as to whether the Indian government will apply the SCI’s ruling on a retroactive basis. As such, the ultimate amount of our obligation may be materially different from the amount accrued. On October 5, 2016, October 27, 2016 and November 18, 2016, three putative securities class action complaints were filed in the USDC-NJ naming us and certain of our current and former officers at that time as defendants. These complaints were consolidated into a single action and on April 7, 2017, the lead plaintiffs filed a consolidated amended complaint on behalf of a putative class of persons and entities who purchased our common stock during the period between February 27, 2015 and September 29, 2016, naming us and certain of our current and former officers at that time as defendants and alleging violations of the Exchange Act, based on allegedly false or misleading statements related to potential violations of the Foreign Corrupt Practices Act, our business, prospects and operations, and the effectiveness of our internal controls over financial reporting and our disclosure controls and procedures. The lead plaintiffs sought an award of compensatory damages, among other relief, and their reasonable costs and expenses, including attorneys’ fees. Defendants filed motions to dismiss the consolidated amended complaint on June 6, 2017. On August 8, 2018, the USDC-NJ issued an order which granted the motions to dismiss in part, including dismissal of all claims against then-current officers of the Company, and denied them in part. On September 7, 2018, we filed a motion in the USDC-NJ to certify the August 8, 2018 order for immediate appeal to the United States Court of Appeals for the Third Circuit pursuant to 28 U.S.C. § 1292(b). On October 18, 2018, the USDC-NJ issued an order granting our motion, and staying the action pending the outcome of our appeal petition to the Third Circuit. On October 29, 2018, we filed a petition for permission to appeal with the Third Circuit. On March 6, 2019, the Third Circuit denied our petition without prejudice. In an order dated March 19, 2019, the USDC-NJ directed the lead plaintiffs to provide the defendants with a proposed amended complaint. On April 26, 2019, lead plaintiffs filed their second amended complaint. We filed a motion to dismiss the second amended complaint on June 10, 2019. On June 7, 2020, the USDC-NJ issued an order denying our motion to dismiss the second amended complaint. On July 10, 2020, we filed our answer to the second amended complaint. On July 23, 2020, the DOJ filed a motion on consent for leave to intervene and to stay all discovery through the conclusion of the criminal proceedings in United States v. Gordon J. Coburn and Steven Schwartz , Crim. No. 19-120 (KM), except for documents produced by us to the DOJ in connection with those criminal proceedings. On July 24, 2020, the USDC-NJ granted the DOJ’s motion; and on that same day, we filed a motion in the USDC-NJ to certify the June 7, 2020 order for immediate appeal to the Third Circuit pursuant to 28 U.S.C. § 1292(b). On March 17, 2021, the USDC-NJ issued an order denying our motion. On September 7, 2021, the parties filed a settlement agreement that resolved the consolidated putative securities class action against us and certain of our former officers. The settlement agreement provides for a payment of $95 million to the putative class (inclusive of attorneys’ fees and litigation expenses). Adjusting for indemnification expenses, legal fees and other covered expenses incurred through September 7, 2021, the remaining available balance under the applicable directors and officers insurance policies was $75 million. As a result, we recorded a loss of $20 million in "Selling, general and administrative expenses" in our consolidated financial statements. The loss is referred to as the Class Action Settlement Loss. We and the other defendants entered into the settlement agreement to eliminate the uncertainty, burden, and expense of further protracted litigation. We and the other defendants expressly deny that the plaintiffs in the consolidated putative securities class action have asserted any valid claims as to us and them, respectively. On September 9, 2021, the USDC-NJ granted preliminary approval of the settlement. On December 21, 2021, the USDC-NJ granted final approval of the settlement and entered a judgment dismissing the consolidated putative securities class action with prejudice. The deadline to appeal the judgement was January 20, 2022, and no appeals were filed before that date. On October 31, 2016, November 15, 2016 and November 18, 2016, three putative shareholder derivative complaints were filed in New Jersey Superior Court, Bergen County, naming us, all of our then current directors and certain of our current and former officers at that time as defendants. These actions were consolidated in an order dated January 24, 2017. The complaints assert claims for breach of fiduciary duty, corporate waste, unjust enrichment, abuse of control, mismanagement, and/or insider selling by defendants. On March 16, 2017, the parties filed a stipulation deferring all further proceedings pending a final, non-appealable ruling on the then-anticipated motion to dismiss the consolidated putative securities class action. On April 26, 2017, in lieu of ordering the stipulation filed by the parties, the New Jersey Superior Court deferred further proceedings by dismissing the consolidated putative shareholder derivative litigation without prejudice but permitting the parties to file a motion to vacate the dismissal in the future. On February 22, 2017, April 7, 2017 and May 10, 2017, three additional putative shareholder derivative complaints alleging similar claims were filed in the USDC-NJ, naming us and certain of our current and former directors and officers at that time as defendants. These complaints asserted claims similar to those in the previously-filed putative shareholder derivative actions. In an order dated June 20, 2017, the USDC-NJ consolidated these actions into a single action, appointed lead plaintiff and lead counsel, and stayed all further proceedings pending a final, non-appealable ruling on the motions to dismiss the consolidated putative securities class action. On October 30, 2018, lead plaintiff filed a consolidated verified derivative complaint. On March 11, 2019, a seventh putative shareholder derivative complaint was filed in the USDC-NJ, naming us and certain of our current and former directors and officers at that time as defendants. The complaint in that action asserts claims similar to those in the previously-filed putative shareholder derivative actions. On May 14, 2019, the USDC-NJ approved a stipulation that (i) consolidated this action with the putative shareholder derivative suits that were previously filed in the USDC-NJ; and (ii) stayed all of these suits pending an order on the motion to dismiss the second amended complaint in the consolidated putative securities class action. On August 3, 2020, lead plaintiffs filed an amended complaint. The USDC-NJ extended the stay through February 14, 2022. On February 14, 2022, we and certain of our current and former directors and officers moved to dismiss the amended complaint. On June 1, 2021, an eighth putative shareholde r derivative complaint was filed in the USDC-NJ, naming us and certain of our current and former directors and officers at that time a s defendants. The complaint asserts claims similar to those in the previously-filed putative shareholder derivative actions. On August 2, 2021, the USDC-NJ approved a stipulation that stayed this action through the earliest of (i) the conclusion of the criminal proceedings in United States v. Gordon J. Coburn and Steven Schwartz, Crim. No. 19-120 (KM), (ii) the dissolution of the stay in the consolidated putative securities class action, provided that the dissolution of the stay in the consolidated putative securities class action is not the result of a settlement agreement or other mutual resolution of the consolidated putative securities class action, or (iii) the dissolution of the stay in the consolidated putative shareholder derivative action pending in USDC-NJ, provided that we are required to answer, move to dismiss, or otherwise respond to the operative complaint in that action following the dissolution of the stay. The stay ended on February 14, 2022, and the litigation is ongoing. We are presently unable to predict the duration, scope or result of the putative shareholder derivative actions. These lawsuits are subject to inherent uncertainties, the actual cost of such litigation will depend upon many unknown factors and the outcome of the litigation is necessarily uncertain. We have indemnification and expense advancement obligations pursuant to our bylaws and indemnification agreements with respect to certain current and former members of senior management and the Company’s board of directors. In connection with the matters that were the subject of our previously disclosed internal investigation, the DOJ and SEC investigations and the related litigation, we have received and expect to continue to receive requests under such indemnification agreements and our bylaws to provide funds for legal fees and other expenses. As of the filing of the settlement agreement on September 7, 2021, there are no amounts remaining available to us under applicable insurance policies for our ongoing indemnification and advancement obligations with respect to certain of our current and former officers and directors or incremental legal fees and other expenses related to the above matters. See Note 11 for information relating to the ITD Dispute. Many of our engagements involve projects that are critical to the operations of our clients’ business and provide benefits that are difficult to quantify. Any failure in a client’s systems or our failure to meet our contractual obligations to our clients, including any breach involving a client’s confidential information or sensitive data, or our obligations under applicable laws or regulations could result in a claim for substantial damages against us, regardless of our responsibility for such failure. Although we attempt to contractually limit our liability for damages arising from negligent acts, errors, mistakes, or omissions in rendering our services, there can be no assurance that the limitations of liability set forth in our contracts will be enforceable in all instances or will otherwise protect us from liability for damages. Although we have general liability insurance coverage, including coverage for errors or omiss ions, we retain a significant portion of risk through our insurance deductibles and the re can be no assurance that such coverage will cover all types of claims, continue to be available on reasonable terms or will be available in sufficient amounts to cover one or more large claims, or that the insurer will not disclaim coverage as to any future claim. The successful assertion of one or more large claims against us that exceed or are not covered by our insurance coverage or changes in our insurance policies, including premium increases or the imposition of large deductible or co-insurance requirements, could have a material adverse effect on our business, results of operations, financial position and cash flows for a particular period.

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2021
Retirement Benefits, Description [Abstract]
Employee Benefits	We contribute to defined contribution plans in the United States and Europe, including 401(k) savings and supplemental retirement plans in the United States. Total expenses for our contributions to these plans were $135 million, $118 million and $117 million for the years ended December 31, 2021, 2020 and 2019, respectively. We maintain employee benefit plans that cover substantially all India-based employees. The employees’ provident fund, pension and family pension plans are statutorily defined contribution retirement benefit plans. Under the plans, employees contribute up to 12.0% of their eligible compensation, which is matched by an equal contribution by the Company. For these plans, we recognized a contribution expense of $121 million, $98 million and $101 million for the years ended December 31, 2021, 2020 and 2019, respectively. On February 28, 2019, a ruling of the SCI altered historical understandings of the obligation under these plans, extending them to cover additional portions of the employee’s income. In the first quarter of 2019, we accrued $117 million with respect to prior periods, assuming retroactive application of the SCI’s ruling, in "Selling, general and administrative expenses" in our consolidated statements of operations. See Note 15 for further information. We also maintain a gratuity plan in India that is a statutory post-employment benefit plan providing defined lump sum benefits. We make annual contributions to the employees’ gratuity fund established with a government-owned insurance corporation to fund a portion of the estimated obligation. Accordingly, our liability for the gratuity plan reflected the undiscounted benefit obligation payable as of the balance sheet date, which was based upon the employees’ salary and years of service. As of December 31, 2021 and 2020, the amount accrued under the gratuity plan was $118 million and $124 million, which is net of fund assets of $212 million and $186 million, respectively . Expense recognized by us was $70 million, $35 million and $38 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock-Based Compensation Plans	The Company's 2017 Incentive Plan and the Purchase Plan provide for the issuance of up to 48.8 million (plus any shares underlying outstanding awards that are forfeited under the 2009 Incentive Plan) and 40.0 million shares, respectively, of Class A common stock to eligible employees. The 2017 Incentive Plan does not affect any awards outstanding under the 2009 Incentive Plan. As of December 31, 2021, we have 22.2 million and 3.9 million shares available for grant under the 2017 Incentive Plan and the Purchase Plan, respectively. The allocation of total stock-based compensation expense between cost of revenues and selling, general and administrative expenses as well as the related income tax benefit were as follows for the three years ended December 31: (in millions) 2021 2020 2019 Cost of revenues $ 49 $ 51 $ 54 SG&A expenses 197 181 163 Total stock-based compensation expense $ 246 $ 232 $ 217 Income tax benefit $ 59 $ 48 $ 39 Restricted Stock Units and Performance Stock Units We granted RSUs that vest proportionately in quarterly or annual installments over periods of up to three years to employees, including our executive officers. Stock-based compensation expense relating to RSUs is recognized on a straight-line basis over the requisite service period. A summary of the activity for RSUs granted under our stock-based compensation plans as of December 31, 2021 and changes during the year then ended is presented below: Number of Weighted Average Unvested at January 1, 2021 4.4 $ 64.09 Granted 3.5 74.66 Vested (3.0) 67.50 Forfeited (1.0) 67.23 Unvested at December 31, 2021 3.9 $ 70.11 The weighted-average grant date fair value of RSUs granted in 2021, 2020 and 2019 was $74.66, $61.85 and $64.12, respectively. As of December 31, 2021, $233 million of total remaining unrecognized stock-based compensation cost related to RSUs is expected to be recognized over the weighted-average remaining requisite service period of 1.7 years. We granted PSUs that vest over periods up to four years to employees, including our executive officers. The vesting of PSUs is contingent on meeting certain financial performance targets, market conditions and continued service. A summary of the activity for PSUs granted under our stock-based compensation plans as of December 31, 2021 and changes during the year then ended is presented below. The presentation reflects the number of PSUs at the maximum performance milestones. Number of Weighted Average Unvested at January 1, 2021 1.7 $ 62.60 Granted 1.2 73.38 Vested — — Forfeited (0.5) 67.11 Adjustment at the conclusion of the performance measurement period (0.1) 61.83 Unvested at December 31, 2021 2.3 $ 67.55 The weighted-average grant date fair value of PSUs granted in 2021, 2020 and 2019 was $73.38, $62.00 and $70.77, respectively. As of December 31, 2021, $41 million of the total remaining unrecognized stock-based compensation cost related to PSUs is expected to be recognized over the weighted-average remaining requisite service period of 1.6 years. All RSUs and PSUs have dividend equivalent rights, which entitle holders to the same dividend value per share as holders of common stock. Dividend equivalent rights are subject to the same vesting and other terms and conditions as the corresponding unvested RSUs and PSUs and are accumulated and paid when the underlying shares vest. The Purchase Plan provides for eligible employees to purchase shares of Class A common stock at a price of 90% of the lesser of: (a) the fair market value of a share of Class A common stock on the first date of the purchase period or (b) the fair market value of a share of Class A common stock on the last date of the purchase period. In December 2021, we amended the Purchase Plan to modify the purchase price for eligible employees to be equal to 95% of the fair market value per share of our Class A common stock on the last date of the purchase period. This change is effective for the first purchase period in 2022. Stock-based compensation expense for the Purchase Plan is recognized over the vesting period of three months on a straight-line basis. The fair values of the options granted under the Purchase Plan, were estimated at the date of grant during the years ended December 31, 2021, 2020, and 2019 based upon the following assumptions and were as follows: 2021 2020 2019 Dividend yield 1.3 % 1.1 % 1.3 % Weighted average volatility factor 27.5 % 35.9 % 24.9 % Weighted average risk-free interest rate 0.03 % 0.6 % 2.2 % Weighted average expected life (in years) 0.25 0.25 0.25 Weighted average grant date fair value $ 11.72 $ 9.38 $ 9.82 During the year ended December 31, 2021, we issued 2.0 million shares of Class A common stock under the Purchase Plan with a total fair value of approximately $23 million.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2021
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Segment Information	Our reportable segments are: • Financial Services, which consists of our banking and insurance operating segments; • Healthcare, which consists of our healthcare and life sciences operating segments; • Products and Resources, which consists of our retail and consumer goods; manufacturing, logistics, energy, and utilities; and travel and hospitality operating segments; and • Communications, Media and Technology, which includes our communications and media operating segment and our technology operating segment. Our client partners, account executives and client relationship managers are aligned in accordance with the specific industries they serve. Our chief operating decision maker evaluates the Company's performance and allocates resources based on segment revenues and operating profit. Segment operating profit is defined as income from operations before unallocated costs. Generally, operating expenses for each operating segment have similar characteristics and are subject to the same factors, pressures and challenges. However, the economic environment and its effects on industries served by our operating segments may affect revenues and operating expenses to differing degrees. Expenses included in segment operating profit consist principally of direct selling and delivery costs (including stock-based compensation expense) as well as a per employee charge for use of our global delivery centers and infrastructure. Certain SG&A expenses, the excess or shortfall of incentive-bas ed compensation for commercial and delivery employees as compared to target, restructuring costs, the 2020 COVID-19 Charges, costs related to the ransomware attack, the 2019 incremental accrual related to the India Defined Contribution Obligation, a portion of depreciation and amortization and the impact of the settlements of our cash flow hedges are not allocated to individual segments in internal management reports used by the chief operating decision maker. Accordingly, such expenses are excluded from segment operating profit and are included below as “unallocated costs” and adjusted against our total income from operations in the table below. Additionally, management has determined that it is not practical to allocate identifiable assets by segment, since such assets are used interchangeably among the segments. For revenues by reportable segment and geographic area see Note 2 . Segment operating profits by reportable segment were as follows: (in millions) 2021 2020 2019 Financial Services $ 1,740 $ 1,449 $ 1,605 Healthcare 1,551 1,383 1,261 Products and Resources 1,325 1,078 1,028 Communications, Media and Technology 941 794 732 Total segment operating profit 5,557 4,704 4,626 Less: unallocated costs 2,731 2,590 2,173 Income from operations $ 2,826 $ 2,114 $ 2,453 Geographic Area Information Long-lived assets by geographic area are as follows: (in millions) 2021 2020 2019 Long-lived Assets: (1) North America (2) $ 377 $ 399 $ 445 Europe 75 88 104 Rest of World (3) 719 764 760 Total $ 1,171 $ 1,251 $ 1,309 (1) Long-lived assets include property and equipment, net of accumulated depreciation and amortization. (2) Substantially all relates to the United States. (3) Substantially all relates to India.

Valuation And Qualifying Accoun

Valuation And Qualifying Accounts	12 Months Ended
	Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Valuation And Qualifying Accounts	Valuation and Qualifying Accounts For the Years Ended December 31, 2021, 2020 and 2019 (in millions) Description Balance at Charged to Charged to Deductions Balance at (in millions) Warranty accrual: 2021 $ 32 $ 36 $ 3 $ 32 $ 39 2020 $ 33 $ 32 $ — $ 33 $ 32 2019 $ 32 $ 33 $ — $ 32 $ 33 Valuation allowance—deferred income tax assets: 2021 $ 29 $ 17 $ — $ — $ 46 2020 $ 24 $ 5 $ — $ — $ 29 2019 $ 11 $ 15 $ — $ 2 $ 24

Subsequent Events (Notes)

Subsequent Events (Notes)	12 Months Ended
	Dec. 31, 2021
Subsequent Event [Line Items]
Subsequent Events [Text Block]	DividendOn January 31, 2022, our Board of Directors approved the Company's declaration of a $0.27 per share dividend with a record date of February 18, 2022 and a payment date of March 1, 2022.

Business Description and Summ_2

Business Description and Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation And Principles of Consolidation	Basis of Presentation, Principles of Consolidation and Use of Estimates. The consolidated financial statements are presented in accordance with GAAP and reflect the consolidated financial position, results of operations, comprehensive income and cash flows of our consolidated subsidiaries for all periods presented. All intercompany balances and transactions have been eliminated in consolidation.
Cash And Cash Equivalents And Investments	Cash and Cash Equivalents and Investments. Cash and cash equivalents consist of all cash balances, including money market funds, certificates of deposits and commercial paper that have a maturity, at the date of purchase, of 90 days or less. We determine the appropriate classification of our investments in marketable securities at the date of purchase and reevaluate such designation at each balance sheet date. We classify and account for our marketable debt securities as either available-for-sale or held-to-maturity. After consideration of our risk versus reward objectives, as well as our liquidity requirements, we may sell our available-for-sale securities prior to their stated maturities. We classify these marketable securities with maturities at the date of purchase beyond 90 days as short-term investments based on their highly liquid nature and because such marketable securities represent an investment of cash that is available for current operations. Available-for-sale securities are reported at fair value with changes in unrealized gains and losses recorded as a separate component of "Accumulated other comprehensive income (loss)" on the consolidated statements of financial position until realized. We determine the cost of the securities sold based on the specific identification method. Our held-to-maturity investment securities are financial instruments for which we have the intent and ability to hold to maturity and we classify these securities with maturities less than one year as short-term investments. Any held-to-maturity investment securities with maturities beyond one year from the balance sheet date are classified as long-term investments. Held-to-maturity securities are reported at amortized cost. Interest and amortization of premiums and discounts for debt securities are included in interest income. For available-for-sale debt securities, if we do not intend to sell the security or it is not more likely than not that we will be required to sell the security before recovery of our amortized cost, we evaluate qualitative criteria, such as the financial health of and specific prospects for the issuer, to determine whether we do not expect to recover the amortized cost basis of the security. We also evaluate quantitative criteria including determining whether there has been an adverse change in expected future cash flows. If we do not expect to recover the entire amortized cost basis of the security, we consider the security to contain an expected credit loss, and we record the difference between the security’s amortized cost basis and its recoverable amount in earnings as an allowance for credit loss and the difference between the security’s recoverable amount and fair value in other comprehensive income. If we intend to sell the security or it is more likely than not we will be required to sell the security before recovery of its amortized cost basis, the security is considered impaired, and we recognize the entire difference between the security’s amortized cost basis and its fair value in earnings. On initial recognition and on an ongoing basis, we evaluate our held-to-maturity investment securities for expected credit losses collectively when they share similar risk characteristics or individually, when the risk characteristics are different. The allowance for expected credit losses is determined using our historical loss experience. We monitor the credit ratings of the
Short-Term Financial Assets And Liabilities	Financial Assets and Liabilities. Cash and certain cash equivalents, time deposits, trade receivables, accounts payable and other accrued liabilities are short-term in nature and, accordingly, their carrying values approximate fair value.
Property And Equipment	Property and Equipment. Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated on a straight-line basis over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of the term of the lease or the estimated useful life of the asset. Deposits paid towards acquisition of long-lived assets and the cost of assets not put in use by the balance sheet date are disclosed under the caption "Capital work-in-progress" in Note 6 .
Lessee, Leases	Leases. Our lease asset classes primarily consist of operating leases for office space, data centers and IT equipment. At inception of a contract, we determine whether a contract contains a lease, and if a lease is identified, whether it is an operating or finance lease. In determining whether a contract contains a lease we consider whether (1) we have the right to obtain substantially all of the economic benefits from the use of the asset throughout the term of the contract, (2) we have the right to direct how and for what purpose the asset is used throughout the term of the contract and (3) we have the right to operate the asset throughout the term of the contract without the lessor having the right to change the terms of the contract. Some of our lease agreements contain both lease and non-lease components that we account for as a single lease component for all of our lease asset classes. Our ROU lease assets represent our right to use an underlying asset for the lease term and may include any advance lease payments made and any initial direct costs and exclude lease incentives. Our lease liabilities represent our obligation to make lease payments arising from the terms of the lease. ROU lease assets and lease liabilities are recognized at the commencement of the lease and are calculated using the present value of lease payments over the lease term. Typically, our lease agreements do not provide sufficient detail to determine the rate implicit in the lease. Therefore, we use our estimated country-specific incremental borrowing rate based on information available at the commencement date of the lease to calculate the present value of the lease payments. In estimating our country-specific incremental borrowing rates, we consider market rates of comparable collateralized borrowings for similar terms. Our lease terms may include the option to extend or terminate the lease before the end of the contractual lease term. Our ROU lease assets and lease liabilities include these options when it is reasonably certain that they will be exercised. A portion of our real estate lease costs is subject to annual changes in the CPI. The changes to the CPI are treated as variable lease payments and are recognized in the period in which the obligation for those payments is incurred. Other variable lease costs primarily relate to adjustments for common area maintenance, utilities, property tax and lease concessions. These variable costs are recognized in the period in which the obligation is incurred. We elect not to recognize ROU assets and lease liabilities for short-term leases with a term equal to or less than 12 months. We recognize the lease payments in our income statement on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred. Both ROU assets and finance lease assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the related asset group may not be recoverable.
Internal Use Software	Internal Use Software. We capitalize certain costs that are incurred to purchase, develop and implement internal-use software during the application development phase, which primarily include coding, testing and certain data conversion activities. Capitalized costs are amortized on a straight-line basis over the useful life of the software. Costs incurred in performing planning and post-implementation activities are expensed as incurred.
Software to be Sold Leased or Marketed	Software to be Sold, Leased or Marketed. We capitalize costs incurred after technological feasibility is reached but before software is available for general release to clients, which primarily include coding and testing activities. Once the product is ready for general release, capitalized costs are amortized over the useful life of the software.
Business Combinations	Business Combinations. We account for business combinations using the acquisition method, which requires the identification of the acquirer, the determination of the acquisition date and the allocation of the purchase price paid by the acquirer to the identifiable tangible and intangible assets acquired, the liabilities assumed, including any contingent consideration and any noncontrolling interest in the acquiree at their acquisition date fair values. Goodwill represents the excess of the purchase price over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. Identifiable intangible assets with finite lives are amortized over their expected useful lives. Acquisition-related costs are expensed in the periods in which the costs are incurred. The results of operations of acquired businesses are included in our consolidated financial statements from the acquisition date .
Equity Method Investments	Equity Method Investments. Equity investments that give us the ability to exercise significant influence, but not control, over an investee are accounted for using the equity method of accounting and recorded in the caption "Long-term investments" on our consolidated statements of financial position. Equity method investments are initially recorded at cost. We periodically review the carrying value of our equity method investments to determine if there has been an other-than-temporary decline in the carrying value. The investment balance is increased to reflect contributions and our share of earnings and decreased to reflect our share of losses, distributions, and other-than-temporary impairments. Our proportionate share of the net income or loss of the investee is recorded in the caption "Income (loss) from equity method investments" on our consolidated statements of operations.
Long-Lived Assets And Finite-Lived Intangibles	Long-lived Assets and Finite-lived Intangible Assets. We review long-lived assets and certain finite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. The carrying amount may not be recoverable when the sum of undiscounted expected future cash flows is less than the carrying amount of such asset groups. The impairment loss is determined as the amount by which the carrying amount of the asset group exceeds its fair value. Intangible assets consist primarily of customer relationships and developed technology, which are being amortized on a straight-line basis over their estimated useful lives.
Goodwill And Indefinite-Lived intangibles	Goodwill and Indefinite-lived Intangible Assets. We evaluate goodwill and indefinite-lived intangible assets for impairment at least annually, or as circumstances warrant. Goodwill is evaluated at the reporting unit level by comparing the fair value of the reporting unit with its carrying amount including goodwill. An impairment of goodwill exists if the carrying amount of the reporting unit exceeds its fair value. The impairment loss is the amount by which the carrying amount exceeds the reporting unit’s fair value, limited to the total amount of goodwill allocated to that reporting unit. For indefinite-lived intangible assets, if our qualitative assessment indicates that it is more-likely-than-not that an indefinite-lived intangible asset is impaired, we test the assets for impairment by comparing the fair value of such assets to their carrying value. If an impairment is indicated, a write down to the fair value of indefinite-lived intangible asset is recorded.
Stock Repurchase Program	Stock Repurchase Program. Under the Board of Directors authorized stock repurchase program, the Company is authorized to repurchase its Class A common stock through open market purchases, including under a 10b5-1 Plan, or in private transactions, including thr ough ASR agreements en tered into with financial institutions, in accordance with applica ble federal securities laws. We account for the repurchased shares as constructively retired. Shares are returned to the status of authorized and unissued shares at the time of repurchase or in the periods they are delivered if repurchased under an ASR. To reflect share repurchases in the consolidated statements of financial position, we (1) reduce common stock for the par value of the shares, (2) reduce additional paid-in capital for the amount in excess of par during the period in which the shares are repurchased and (3) record any residual amount in excess of available additional paid-in capital to retained earnings. Upfront payments related to ASRs are accounted for as a reduction to stockholders’ equity in the consolidated statements of financial position in the period the payments are made.
Revenue Recognition	Revenue Recognition. We recognize revenues as we transfer control of deliverables (products, solutions and services) to our clients in an amount reflecting the consideration to which we expect to be entitled. To recognize revenues, we apply the following five step approach: (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 revenues when a performance obligation is satisfied. We account for a contract when it has approval and commitment from all parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. We apply judgment in determining the customer’s ability and intention to pay based on a variety of factors including the customer’s historical payment experience. For performance obligations where control is transferred over time, revenues are recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the deliverables to be provided. Revenues related to fixed-price contracts for application development and systems integration services, consulting or other technology services are recognized as the service is performed using the cost to cost method, under which the total value of revenues is recognized on the basis of the percentage that each contract’s total labor cost to date bears to the total expected labor costs. Revenues related to fixed-price application maintenance, testing and business process services are recognized based on our right to invoice for services performed for contracts in which the invoicing is representative of the value being delivered. If our invoicing is not consistent with the value delivered, revenues are recognized as the service is performed based on the cost to cost method described above. The cost to cost method requires estimation of future costs, which is updated as the project progresses to reflect the latest available information; such estimates and changes in estimates involve the use of judgment. The cumulative impact of any revision in estimates is reflected in the financial reporting period in which the change in estimate becomes known and any anticipated losses on contracts are recognized immediately, where appropriate. Revenues related to fixed-price hosting and infrastructure services are recognized based on our right to invoice for services performed for contracts in which the invoicing is representative of the value being delivered. If our invoicing is not consistent with the value delivered, revenues are recognized on a straight-line basis unless revenues are earned and obligations are fulfilled in a different pattern. The revenue recognition method applied to the types of contracts described above provides the most faithful depiction of performance towards satisfaction of our performance obligations; for example, the cost to cost method is used when the value of services provided to the customer is best represented by the costs expended to deliver those services. Revenues related to our time-and-materials, transaction-based or volume-based contracts are recognized over the period the services are provided either using an output method such as labor hours, or a method that is otherwise consistent with the way in which value is delivered to the customer. Revenues related to our non-hosted software license arrangements that do not require significant modification or customization of the underlying software are recognized when the software is delivered as control is transferred at a point in time. For software license arrangements that require significant functionality enhancements or modification of the software, revenues for the software license and related services are recognized as the services are performed in accordance with the methods applicable to application development and systems integration services described above. In software hosting arrangements, the rights provided to the customer, such as ownership of a license, contract termination provisions and the feasibility of the client to operate the software, are considered in determining whether the arrangement includes a license or a service. Sales and usage-based fees promised in exchange for licenses of intellectual property are not recognized as revenue until the uncertainty related to the variable amounts is resolved. Revenues related to software maintenance and support are generally recognized on a straight-line basis over the contract period. Incentive revenues, volume discounts, or any other form of variable consideration is estimated using either the sum of probability weighted amounts in a range of possible consideration amounts (expected value) or the single most likely amount in a range of possible consideration amounts (most likely amount), depending on which method better predicts the amount of consideration to which we may be entitled. We include in the transaction price variable consideration only to the extent it is probable that a significant reversal of revenues recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether and when to include estimated amounts in the transaction price may involve judgment and are based largely on an assessment of our anticipated performance and all information that is reasonably available to us. Revenues also include the reimbursement of out-of-pocket expenses. Our warranties generally provide a customer with assurance that the related deliverable will function as the parties intended because it complies with agreed-upon specifications and are therefore not considered an additional performance obligation in the contract. We may enter into arrangements that consist of multiple performance obligations. Such arrangements may include any combination of our deliverables. To the extent a contract includes multiple promised deliverables, we apply judgment to determine whether promised deliverables are capable of being distinct and are distinct in the context of the contract. If these criteria are not met, the promised deliverables are accounted for as a combined performance obligation. For arrangements with multiple distinct performance obligations, we allocate consideration among the performance obligations based on their relative standalone selling price. Standalone selling price is the price at which we would sell a promised good or service separately to the customer. When not directly observable, we typically estimate standalone selling price by using the expected cost plus a margin approach. We typically establish a standalone selling price range for our deliverables, which is reassessed on a periodic basis or when facts and circumstances change. We assess the timing of the transfer of goods or services to the customer as compared to the timing of payments to determine whether a significant financing component exists. As a practical expedient, we do not assess the existence of a significant financing component when the difference between payment and transfer of deliverables is a year or less. If the difference in timing arises for reasons other than the provision of finance to either the customer or us, no financing component is deemed to exist. The primary purpose of our invoicing terms is to provide customers with simplified and predictable ways of purchasing our services, not to receive or provide financing from or to customers. We do not consider set up or transition fees paid upfront by our customers to represent a financing component, as such fees are required to encourage customer commitment to the project and protect us from early termination of the contract. Our contracts may be modified to add, remove or change existing performance obligations. The accounting for modifications to our contracts involves assessing whether the services added to an existing contract are distinct and whether the pricing is at the standalone selling price. Services added that are not distinct are accounted for on a cumulative catch up basis, while those that are distinct are accounted for prospectively, either as a separate contract if the additional services are priced at the standalone selling price, or as a termination of the existing contract and creation of a new contract if not priced at the standalone selling price. Services added to our application development and systems integration service contracts are typically not distinct, while services added to our other contracts, including application maintenance, testing and business process services contracts, are typically distinct. From time to time, we may enter into arrangements with third party suppliers to resell products or services. In such cases, we evaluate whether we are the principal (i.e., report revenues on a gross basis) or agent (i.e., report revenues on a net basis). In doing so, we evaluate whether we control the good or service before it is transferred to the customer. If we control the good or service before it is transferred to the customer, we are the principal; if not, we are the agent. Determining whether we control the good or service before it is transferred to the customer may require judgment. Trade Accounts Receivable, Contract Assets and Contract Liabilities. We classify our right to consideration in exchange for deliverables as either a receivable or a contract asset. A receivable is a right to consideration that is unconditional (i.e., only the passage of time is required before payment is due). For example, we recognize a receivable for revenues related to our time and materials and transaction or volume-based contracts when earned regardless of whether amounts have been billed. We present such receivables in "Trade accounts receivable, net" in our consolidated statements of financial position at their net estimated realizable value. A contract asset is a right to consideration that is conditional upon factors other than the passage of time. Contract assets are presented in "Other current assets" in our consolidated statements of financial position and primarily relate to unbilled amounts on fixed-price contracts utilizing the cost to cost method of revenue recognition. Our contract liabilities, or deferred revenue, consist of advance payments from clients and billings in excess of revenues recognized. We classify deferred revenue as current or noncurrent based on the timing of when we expect to recognize the revenues. Our contract assets and contract liabilities are reported on a net basis by contract at the end of each reporting period. The difference between the opening and closing balances of our contract assets and contract liabilities primarily results from the timing difference between our performance obligations and the client’s payment. We receive payments from clients based on the terms established in our contracts, which vary by contract type. Allowance for Credit Losses . We calculate expected credit losses for our trade accounts receivable and contract assets. Expected credit losses include losses expected based on known credit issues with specific customers as well as a general expected credit loss allowance based on relevant information, including historical loss rates, current conditions, and reasonable economic forecasts that affect collectibility . We update our allowance for credit losses on a quarterly basis with changes in the allowance recognized in income from operations. Costs to Fulfill. Recurring operating costs for contracts with customers are recognized as incurred. Certain eligible, nonrecurring costs (i.e., set-up or transition costs) are capitalized when such costs (1) relate directly to the contract, (2) generate or enhance resources of the Company that will be used in satisfying the performance obligation in the future, and (3) are expected to be recovered. These costs are expensed ratably over the estimated life of the customer relationship, including expected contract renewals. In determining the estimated life of the customer relationship, we evaluate the average contract term, on a portfolio basis by nature of the services to be provided, and apply judgment in evaluating the rate of technological and industry change. Capitalized amounts are monitored regularly for impairment. Impairment losses are recorded when projected remaining undiscounted operating cash flows are not sufficient to recover the carrying amount of the capitalized costs to fulfill.
Accounts Receivable [Policy Text Block]	Trade Accounts Receivable, Contract Assets and Contract Liabilities. We classify our right to consideration in exchange for deliverables as either a receivable or a contract asset. A receivable is a right to consideration that is unconditional (i.e., only the passage of time is required before payment is due). For example, we recognize a receivable for revenues related to our time and materials and transaction or volume-based contracts when earned regardless of whether amounts have been billed. We present such receivables in "Trade accounts receivable, net" in our consolidated statements of financial position at their net estimated realizable value. A contract asset is a right to consideration that is conditional upon factors other than the passage of time. Contract assets are presented in "Other current assets" in our consolidated statements of financial position and primarily relate to unbilled amounts on fixed-price contracts utilizing the cost to cost method of revenue recognition. Our contract liabilities, or deferred revenue, consist of advance payments from clients and billings in excess of revenues recognized. We classify deferred revenue as current or noncurrent based on the timing of when we expect to recognize the revenues.
Stock-Based Compensation	Stock-Based Compensation. Stock-based compensation expense for awards of equity instruments to employees and non-employee directors is determined based on the grant date fair value of those awards. We recognize these compensation costs net of an estimated forfeiture rate over the requisite service period of the award. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs materially from original estimates. Stock-based compensation costs for PSUs are recognized on a graded-vesting basis over the vesting period based on the most probable outcome of the performance conditions. If the minimum performance targets are not met, no compensation cost is recognized and any recognized compensation cost is reversed, except for awards subject to a market condition. The fair value of RSUs and PSUs is determined
Foreign Currency	Foreign Currency. The assets and liabilities of our foreign subsidiaries whose functional currency is not the U.S. dollar are translated into U.S. dollars at current exchange rates while revenues and expenses are translated at average monthly exchange rates. The resulting translation adjustments are recorded in the caption "Accumulated other comprehensive income (loss)" on the consolidated statements of financial position. Foreign currency transactions and balances are those that are denominated in a currency other than the entity’s functional currency. An entity's functional currency is the currency of the primary economic environment in which it operates. The U.S. dollar is the functional currency for some of our foreign subsidiaries. For these subsidiaries, transactions and balances denominated in the local currency are foreign currency transactions. Foreign currency transactions and balances related to non-monetary assets and liabilities are remeasured to the functional currency of the entity at historical exchange rates while monetary assets and liabilities are remeasured to the functional currency of the entity at current exchange rates. Foreign currency exchange gains or losses from remeasurement are included in the caption "Foreign currency exchange gain (losses), net" on our consolidated statements of operations together with gains or losses on our undesignated foreign currency hedges.
Derivative Financial Instruments	Derivative Financial Instruments. Derivative financial instruments are recorded on our consolidated statements of financial position as either an asset or liability measured at its fair value as of the reporting date. Our derivative financial instruments consist primarily of foreign exchange forward and option contracts. For derivative financial instruments to qualify for hedge accounting, the following criteria must be met: (1) the hedging instrument must be designated as a hedge; (2) the hedged exposure must be specifically identifiable and must expose us to risk; and (3) it must be expected that a change in fair value of the hedging instrument and an opposite change in the fair value of the hedged exposure will have a high degree of correlation. Changes in our derivatives’ fair values are recognized in net income unless specific hedge accounting and documentation criteria are met (i.e., the instruments are designated and accounted for as hedges). We record the effective portion of the unrealized gains and losses on our derivative financial instruments that are designated as cash flow hedges in the caption "Accumulated other comprehensive income (loss)" in the consolidated statements of financial position. Any ineffectiven ess or excluded portion of a designated cash flow hedge is recognized in net income. U pon occurrence of the hedged transaction, the gains and losses on the derivative are recognized in net income.
Use Of Estimates	The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying disclosures. We evaluate our estimates on a continuous basis. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. The actual amounts may vary from the estimates used in the preparation of the accompanying consolidated financial statements.
Income Taxes	Income Taxes. We provide for income taxes utilizing the asset and liability method of accounting. Under this method, deferred income taxes are recorded to reflect the tax consequences in future years of differences between the tax basis of assets and liabilities and their financial reporting amounts at each balance sheet date, based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to affect taxable income. If it is determined that it is more likely than not that future tax benefits associated with a deferred income tax asset will not be realized, a valuation allowance is provided. The effect of a change in tax rates on deferred income tax assets and liabilities is recognized in the provision for income taxes in the period that includes the enactment date. Our provision for income taxes also includes the impact of provisions established for uncertain income tax positions, as well as any related penalties and interest. We adjust these reserves in light of changing facts and circumstances, such as the closing of a tax audit. To the extent that the final outcome of these matters differs from the amounts recorded, such differences will impact the provision for income taxes in the period in which such determination is made.
Earnings Per Share, Or EPS	Earnings Per Share. Basic EPS is computed by dividing earnings available to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS includes all potential dilutive common stock in the weighted average shares outstanding. We exclude from the calculation of diluted EPS options with exercise prices that are greater than the average market price and shares related to stock-based awards whose combined exercise price and unamortized fair value were greater in each of those periods than the average market price of our common stock for the period, because their effect would be anti-dilutive. We excluded less than 1 million of anti-dilutive shares in each of 2021, 2020 and 2019 from our diluted EPS calculation. We include PSUs in the dilutive common shares when they become contingently issuable per the authoritative guidance and exclude them when they are not contingently issuable.
Recently Adopted/ New Accounting Pronouncements	Recently Adopted Accounting Pronouncements Date Issued and Topic Date Adopted and Method Description Impact February 2016 Leases January 1, 2019 Effective Date Method The new standard replaces the existing guidance on leases and requires the lessee to recognize a ROU asset and a lease liability for all leases with lease terms greater than twelve months. For finance leases, the lessee recognizes interest expense and amortization of the ROU asset, and for operating leases, the lessee recognizes total lease expense on a straight-line basis. As a result of the adoption, we recorded an increase to opening retained earnings of $2 million. June 2016 Financial Instruments-Credit Losses January 1, 2020 Modified Retrospective The new standard requires the measurement and recognition of expected credit losses using the current expected credit loss model for financial assets held at amortized cost, which includes the Company’s trade accounts receivable, certain financial instruments and contract assets. It replaces the existing incurred loss impairment model with an expected loss methodology. The recorded credit losses are adjusted each period for changes in expected lifetime credit losses. The standard requires a cumulative effect adjustment to the statement of financial position as of the beginning of the first reporting period in which the guidance is effective. As a result of the adoption, we recorded an increase to our opening retained earnings and "Trade accounts receivable, net" of $1 million each. Prior year amounts are not adjusted and continue to be reported in accordance with our historical accounting policies.
Cloud Computing Arrangements	Cloud Computing Arrangements. We defer certain implementation costs that are incurred when implementing cloud computing service or SaaS arrangements, which primarily include efforts associated with configuration and development activities. Once the service is ready for use, deferred costs are expensed over the term of the arrangement and recognized in income from operations.

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2021
Revenues [Abstract]
Disaggregation of Revenue	Disaggregation of Revenues The tables below present disaggregated revenues from contracts with clients by client location, service line and contract-type for each of our business segments. We believe this disaggregation best depicts how the nature, amount, timing and uncertainty of our revenues and cash flows are affected by industry, market and other economic factors. Our consulting and technology services include consulting, application development, systems integration, and application testing services as well as software solutions and related services while our outsourcing services include application maintenance, infrastructure and business process services. Revenues are attributed to geographic regions based upon client location, which is the client's billing address. Substantially all revenues in our North America region relate to clients in the United States. Year Ended December 31, 2021 (in millions) FS HC P&R CMT Total Revenues Geography: North America $ 4,204 $ 4,571 $ 2,937 $ 1,924 $ 13,636 United Kingdom 547 168 471 456 1,642 Continental Europe 745 477 539 158 1,919 Europe - Total 1,292 645 1,010 614 3,561 Rest of World 555 121 329 305 1,310 Total $ 6,051 $ 5,337 $ 4,276 $ 2,843 $ 18,507 Service line: Consulting and technology services $ 4,079 $ 3,090 $ 2,725 $ 1,693 $ 11,587 Outsourcing services 1,972 2,247 1,551 1,150 6,920 Total $ 6,051 $ 5,337 $ 4,276 $ 2,843 $ 18,507 Type of contract: Time and materials $ 3,613 $ 2,063 $ 1,785 $ 1,679 $ 9,140 Fixed-price 2,063 2,157 2,085 1,032 7,337 Transaction or volume-based 375 1,117 406 132 2,030 Total $ 6,051 $ 5,337 $ 4,276 $ 2,843 $ 18,507 Year Ended December 31, 2020 (in millions) FS HC P&R CMT Total Revenues Geography: North America $ 4,013 $ 4,181 $ 2,650 $ 1,737 $ 12,581 United Kingdom 463 157 371 344 1,335 Continental Europe 629 434 413 177 1,653 Europe - Total 1,092 591 784 521 2,988 Rest of World 516 80 262 225 1,083 Total $ 5,621 $ 4,852 $ 3,696 $ 2,483 $ 16,652 Service line: Consulting and technology services $ 3,691 $ 2,786 $ 2,249 $ 1,456 $ 10,182 Outsourcing services 1,930 2,066 1,447 1,027 6,470 Total $ 5,621 $ 4,852 $ 3,696 $ 2,483 $ 16,652 Type of contract: Time and materials $ 3,548 $ 1,950 $ 1,548 $ 1,515 $ 8,561 Fixed-price 1,736 1,777 1,741 871 6,125 Transaction or volume-based 337 1,125 407 97 1,966 Total $ 5,621 $ 4,852 $ 3,696 $ 2,483 $ 16,652 Year Ended December 31, 2019 (in millions) FS HC P&R CMT Total Revenues Geography: North America $ 4,137 $ 4,147 $ 2,678 $ 1,764 $ 12,726 United Kingdom 484 130 380 319 1,313 Continental Europe 728 341 453 169 1,691 Europe - Total 1,212 471 833 488 3,004 Rest of World 520 77 259 197 1,053 Total $ 5,869 $ 4,695 $ 3,770 $ 2,449 $ 16,783 Service line: Consulting and technology services $ 3,782 $ 2,564 $ 2,295 $ 1,305 $ 9,946 Outsourcing services 2,087 2,131 1,475 1,144 6,837 Total $ 5,869 $ 4,695 $ 3,770 $ 2,449 $ 16,783 Type of contract: Time and materials $ 3,651 $ 1,845 $ 1,632 $ 1,528 $ 8,656 Fixed-price 1,922 1,635 1,730 803 6,090 Transaction or volume-based 296 1,215 408 118 2,037 Total $ 5,869 $ 4,695 $ 3,770 $ 2,449 $ 16,783
Capitalized Contract Cost	Costs to Fulfill The following table presents information related to the capitalized costs to fulfill, such as setup or transition activities . Costs to fulfill are recorded in "Other noncurrent assets" in our consolidated statements of financial position and the amortization expense of costs to fulfill is included in "Cost of revenues" in our consolidated statements of operations. Costs to obtain contracts were immaterial for the period disclosed. (in millions) 2021 2020 Beginning balance $ 467 $ 485 Costs capitalized 56 98 Amortization expense (118) (102) Impairment charge (11) (14) Ending balance $ 394 $ 467
Contract with Customer, Asset and Liability	The table below shows significant movements in contract assets: (in millions) 2021 2020 Beginning balance $ 315 $ 334 Revenues recognized during the period but not billed 275 289 Amounts reclassified to trade accounts receivable (280) (308) Ending balance $ 310 $ 315 Our contract liabilities, or deferred revenue, consist of advance payments and billings in excess of revenues recognized. The table below shows significant movements in the deferred revenue balances (current and noncurrent): (in millions) 2021 2020 Beginning balance $ 419 $ 336 Amounts billed but not recognized as revenues 413 368 Revenues recognized related to the beginning balance of deferred revenue (389) (285) Ending balance $ 443 $ 419
Reinsurance Recoverable, Allowance for Credit Loss	The following table presents the activity in the allowance for credit losses for the trade accounts receivable: (in millions) 2021 2020 2019 Beginning balance $ 57 $ 67 $ 78 Impact of adoption of the Credit Loss Standard — (1) — Credit loss expense 6 8 (11) Write-offs charged against the allowance (13) (17) — Ending balance $ 50 $ 57 $ 67

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2021
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The allocations of preliminary purchase price to the fair value of the assets acquired and li abilities assumed were as follows: (dollars in millions) Devbridge Servian Magenic ESG Mobility Linium Other Total Weighted Average Useful Life Cash $ 7 $ 4 $ 13 $ 28 $ — $ 2 $ 54 Trade accounts receivable 12 15 17 30 5 12 91 Property and equipment and other assets 5 6 4 8 1 4 28 Operating lease assets, net 11 5 10 27 — 1 54 Non-deductible goodwill 41 184 10 26 — 18 279 Tax-deductible goodwill 140 — 137 24 57 10 368 Customer relationship assets 72 77 90 77 24 32 372 9.8 years Other intangible assets — 2 1 — — — 3 3.8 years Current liabilities (11) (12) (29) (22) (2) (7) (83) Noncurrent liabilities (9) (29) (7) (66) — (6) (117) Purchase price, inclusive of contingent consideration $ 268 $ 252 $ 246 $ 132 $ 85 $ 66 $ 1,049 The allocations of purchase price to the fair value of the assets acquired and liabilities assumed were as follows: (dollars in millions) Collaborative Solutions New Signature Tin Roof 10th Magnitude Others Total Weighted Average Useful Life Cash $ 10 $ 13 $ — $ 2 $ 10 $ 35 Trade accounts receivable 38 13 10 7 21 89 Property and equipment and other assets 6 6 1 2 15 30 Operating lease assets, net 6 7 2 4 13 32 Non-deductible goodwill 44 292 — 90 66 492 Deductible goodwill 281 — 86 39 92 498 Customer relationship intangible assets 37 8 69 10 21 145 9.8 years Other intangible assets 8 1 — — 2 11 5.4 years Current liabilities (25) (20) (13) (15) (23) (96) Noncurrent liabilities (5) (8) (2) (5) (15) (35) Purchase price, inclusive of contingent consideration (1) $ 400 $ 312 $ 153 $ 134 $ 202 $ 1,201 (1) The purchase price for our acquisitions includes contingent consideration components with a collective maximum payout of $59 million, valued at $42 million at the date of acquisition, which is contingent upon achieving certain performance thresholds during the first two calendar years following the date of acquisition.

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2021
Investments [Abstract]
Marketable Securities [Table Text Block]	Our investments were as follows as of December 31: (in millions) 2021 2020 Short-term investments: Equity investment security $ 26 $ 27 Available-for-sale investment securities 310 — Held-to-maturity investment securities 37 14 Time deposits 554 3 Total short-term investments $ 927 $ 44 Long-term investments: Other investments $ 66 $ 35 Restricted time deposits (1) 397 405 Total long-term investments $ 463 $ 440
Schedule of Realized Gain (Loss) [Table Text Block]	Proceeds from sales of available-for-sale investment securities and the gross gains and losses that have been included in earnings as a result of those sales were as follows: (in millions) 2021 2020 2019 Proceeds from sales of available-for-sale investment securities $ — $ — $ 1,712 Gross gains $ — $ — $ 6 Gross losses — — (5) Net realized gains on sales of available-for-sale investment securities $ — $ — $ 1
Unrealized Gain (Loss) on Investments [Table Text Block]	The amortized cost and fair value of held-to-maturity investment securities were as follows as of December 31: 2021 2020 (in millions) Amortized Fair Amortized Fair Short-term investments, due within one year: Corporate and other debt securities $ 17 $ 17 $ 14 $ 14 Commercial paper 20 20 — — Total held-to-maturity investments $ 37 $ 37 $ 14 $ 14

Property and Equipment, net (Ta

Property and Equipment, net (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment, Net [Abstract]
Schedule of property and equipment	Property and equipment were as follows as of December 31: Estimated Useful Life 2021 2020 (in years) (in millions) Buildings 30 $ 777 $ 783 Computer equipment 3 – 5 638 636 Computer software 3 – 8 926 840 Furniture and equipment 5 – 9 772 761 Land 7 7 Capital work-in-progress 116 122 Leasehold improvements Shorter of the lease term or 431 424 Sub-total 3,667 3,573 Accumulated depreciation and amortization (2,496) (2,322) Property and equipment, net $ 1,171 $ 1,251

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Schedule of Lease's Statement of Financial Position	The following table provides information on the components of our operating and finance leases included in our consolidated statement of financial position as of December 31: Leases Location on Statement of Financial Position 2021 2020 Assets (in millions) ROU operating lease assets Operating lease assets, net $ 933 $ 1,013 ROU finance lease assets Property and equipment, net 7 14 Total $ 940 $ 1,027 Liabilities Current Operating lease Operating lease liabilities $ 195 $ 211 Finance lease Accrued expenses and other current liabilities 8 11 Noncurrent Operating lease Operating lease liabilities, noncurrent 783 846 Finance lease Other noncurrent liabilities 5 11 Total $ 991 $ 1,079
Schedule of Cash Flow and Other Information	The following table provides information on the weighted average remaining lease term and weighted average discount rate for our operating leases as of December 31: Operating Lease Term and Discount Rate 2021 2020 Weighted average remaining lease term 6.5 years 6.2 years Weighted average discount rate 5.4 % 5.7 % The following table provides supplemental cash flow and non-cash information related to our operating leases as of December 31: (in millions) 2021 2020 2019 Cash paid for amounts included in the measurement of operating lease liabilities $ 274 $ 271 $ 232 ROU assets obtained in exchange for operating lease liabilities 100 273 274
Schedule of Future Minimum Payments	The following table provides the schedule of maturities of our operating lease liabilities and a reconciliation of the undiscounted cash flows to the operating lease liabilities recognized in the statement of financial position as of December 31: (in millions) 2021 2022 $ 241 2023 197 2024 161 2025 138 2026 112 Thereafter 318 Total operating lease payments 1,167 Interest (189) Total operating lease liabilities $ 978

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets, net (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule Of Goodwill	Changes in goodwill by our reportable segments were as follows for the years ended December 31, 2021 and 2020: Segment January 1, 2021 Goodwill Additions and Adjustments Foreign Currency Translation Adjustments December 31, 2021 (in millions) Financial Services $ 932 $ 198 $ (21) $ 1,109 Healthcare 2,755 84 (8) 2,831 Products and Resources 780 200 (13) 967 Communications, Media and Technology 564 156 (7) 713 Total goodwill $ 5,031 $ 638 $ (49) $ 5,620 Segment January 1, 2020 Goodwill Additions and Adjustments Foreign Currency Translation Adjustments December 31, 2020 (in millions) Financial Services $ 700 $ 204 $ 28 $ 932 Healthcare 2,595 149 11 2,755 Products and Resources 417 346 17 780 Communications, Media and Technology 267 289 8 564 Total goodwill $ 3,979 $ 988 $ 64 $ 5,031
Schedule of Finite-Lived Intangible Assets	Components of intangible assets were as follows as of December 31: 2021 2020 (in millions) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Customer relationships $ 1,679 $ (610) $ 1,069 $ 1,333 $ (490) $ 843 Developed technology 385 (330) 55 388 (286) 102 Indefinite lived trademarks 72 — 72 72 — 72 Finite lived trademarks and other 81 (59) 22 80 (51) 29 Total intangible assets $ 2,217 $ (999) $ 1,218 $ 1,873 $ (827) $ 1,046
Schedule of Indefinite-Lived Intangible Assets	Components of intangible assets were as follows as of December 31: 2021 2020 (in millions) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Customer relationships $ 1,679 $ (610) $ 1,069 $ 1,333 $ (490) $ 843 Developed technology 385 (330) 55 388 (286) 102 Indefinite lived trademarks 72 — 72 72 — 72 Finite lived trademarks and other 81 (59) 22 80 (51) 29 Total intangible assets $ 2,217 $ (999) $ 1,218 $ 1,873 $ (827) $ 1,046
Schedule Of Estimated Amortization Expense	The following table provides the estimated amortization expense related to our existing intangible assets for the next five years. (in millions) Estimated Amortization 2022 $ 186 2023 144 2024 139 2025 136 2026 132

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Accrued Expenses And Other Current Liabilities [Abstract]
Accrued Expenses And Other Current Liabilities	Accrued expenses and other current liabilities were as follows as of December 31: (in millions) 2021 2020 Compensation and benefits $ 1,601 $ 1,607 Customer volume and other incentives 242 266 Income taxes 74 34 Professional fees 220 143 Other 395 469 Total accrued expenses and other current liabilities $ 2,532 $ 2,519

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of long-term debt	The following summarizes our long-term debt balances as of December 31: (in millions) 2021 2020 Term Loan $ 666 $ 703 Less: Current maturities (38) (38) Deferred financing costs (2) (2) Long-term debt, net of current maturities $ 626 $ 663
Schedule of debt maturities	The following represents the schedule of maturities of our term loan: Year Amounts (in millions) 2022 $ 38 2023 628 Total $ 666

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule Of Income Before Provision For Income Tax	Income before provision for income taxes shown below is based on the geographic location to which such income was attributed for years ended December 31: (in millions) 2021 2020 2019 United States $ 818 $ 814 $ 931 Foreign 2,009 1,282 1,612 Income before provision for income taxes $ 2,827 $ 2,096 $ 2,543
Schedule Of Components Of Provision For Income Taxes	The provision for income taxes consisted of the following components for the years ended December 31: (in millions) 2021 2020 2019 Current: Federal and state $ 210 $ 137 $ 549 Foreign 456 383 400 Total current provision 666 520 949 Deferred: Federal and state (50) (77) (320) Foreign 77 261 14 Total deferred provision (benefit) 27 184 (306) Total provision for income taxes $ 693 $ 704 $ 643
Reconciliation Between Effective Income Tax Rate and U.S. Federal Statutory Rate	The reconciliation between the U.S. federal statutory rate and our effective income tax rate were as follows for the years ended December 31: (Dollars in millions) 2021 % 2020 % 2019 % Tax expense, at U.S. federal statutory rate $ 594 21.0 $ 440 21.0 $ 534 21.0 State and local income taxes, net of federal benefit 50 1.8 52 2.5 59 2.3 Non-taxable income for Indian tax purposes (36) (1.3) (48) (2.3) (90) (3.5) Rate differential on foreign earnings 137 4.8 178 8.5 145 5.7 Net impact related to the India Tax Law — — — — 21 0.8 Recognition of benefits related to uncertain tax positions (14) (0.5) — — — — Credits and other incentives (42) (1.5) (51) (2.4) (57) (2.2) Reversal of indefinite reinvestment assertion — — 140 6.6 — — Other 4 0.2 (7) (0.3) 31 1.2 Total provision for income taxes $ 693 24.5 $ 704 33.6 $ 643 25.3
Schedule Of Deferred Tax Assets and Liabilities	The significant components of deferred income tax assets and liabilities recorded on the consolidated statements of financial position were as follows as of December 31: (in millions) 2021 2020 Deferred income tax assets: Net operating losses $ 52 $ 36 Revenue recognition 116 41 Compensation and benefits 230 259 MAT and credit carryforwards 27 109 Expenses not currently deductible 121 147 546 592 Less: valuation allowance (46) (29) Deferred income tax assets, net 500 563 Deferred income tax liabilities: Depreciation and amortization 202 198 Deferred costs 84 105 Other 28 21 Deferred income tax liabilities 314 324 Net deferred income tax assets $ 186 $ 239
Summary Of Changes in Unrecognized Tax Benefits	Changes in unrecognized income tax benefits were as follows for the years ended December 31: (in millions) 2021 2020 2019 Balance, beginning of year $ 193 $ 152 $ 117 Additions based on tax positions related to the current year 34 28 22 Additions for tax positions of prior years 16 10 14 Additions for tax positions of acquired subsidiaries 12 3 — Reductions for tax positions due to lapse of statutes of limitations (17) — — Reductions for tax positions of prior years — — (1) Settlements (43) — — Foreign currency exchange movement (1) — — Balance, end of year $ 194 $ 193 $ 152

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Location And Fair Values Of Derivative Financial Instruments In Our Condensed Consolidated Statements Of Financial Position	The following table provides information on the location and fair values of derivative financial instruments included in our consolidated statements of financial position as of December 31: (in millions) 2021 2020 Designation of Derivatives Location on Statement of Assets Liabilities Assets Liabilities Foreign exchange forward and option contracts – Designated as cash flow hedging instruments Other current assets $ 51 $ — $ 45 $ — Other noncurrent assets 15 — 26 — Total 66 — 71 — Foreign exchange forward contracts - Not designated as cash flow hedging instruments Other current assets 3 — 1 — Accrued expenses and other current liabilities — 7 — 1 Total 3 7 1 1 Total $ 69 $ 7 $ 72 $ 1
Notional Value Of Outstanding Cash Flow Hedge Contracts By Year Of Maturity And Net Unrealized (Loss) Gain Included In Accumulated Other Comprehensive Income (Loss)	The notional value of our outstanding contracts by year of maturity was as follows as of December 31: (in millions) 2021 2020 2021 $ — $ 1,470 2022 1,643 803 2023 880 — Total notional value of contracts outstanding (1) $ 2,523 $ 2,273 (1) Includes $78 million and $133 million notional value of option contracts as of December 31, 2021 and 2020, with the remaining notional value related to forward contracts.
Location And Amounts Of Pre-Tax Gains (Losses) On Cash Flow Hedge Derivative Financial Instruments	The following table provides information on the location and amounts of pre-tax gains on our cash flow hedges for the year ended December 31: (in millions) Change in Location of Net Derivative Net Gains Reclassified 2021 2020 2021 2020 Foreign exchange forward and option contracts – Designated as cash flow hedging instruments $ 67 $ 39 Cost of revenues $ 55 $ 3 Selling, general and administrative expenses 8 — Total $ 63 $ 3
Additional Information Related To Outstanding Contracts Not Designated As Hedging Instruments	Additional information related to our outstanding foreign exchange forward contracts not designated as hedging instruments was as follows as of December 31: (in millions) 2021 2020 Notional Fair Value Notional Fair Value Contracts outstanding $ 847 $ (4) $ 637 $ — The following table provides information on the location and amounts of realized and unrealized pre-tax gains (losses) on our other derivative financial instruments for the year ended December 31: (in millions) Location of Net Gains (Losses) Amount of Net Gains (Losses) 2021 2020 Foreign exchange forward contracts - Not designated as hedging instruments Foreign currency exchange gains (losses), net $ 13 $ (63)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Financial Assets And (Liabilities) Measured At Fair Value On A Recurring Basis	The following table summarizes our financial assets and (liabilities) measured at fair value on a recurring basis as of December 31, 2021: (in millions) Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 507 $ — $ — $ 507 Time deposits — 4 — 4 Commercial paper — 266 — 266 Short-term investments: Time deposits — 554 — 554 Equity investment security 26 — — 26 Available-for-sale investment securities: Commercial paper — 310 — 310 Other current assets Foreign exchange forward and option contracts — 54 — 54 Long-term investments: Restricted time deposits (1) — 397 — 397 Other noncurrent assets Foreign exchange forward contracts — 15 — 15 Accrued expenses and other current liabilities: Foreign exchange forward contracts — (7) — (7) Contingent consideration liabilities — — (14) (14) Other noncurrent liabilities Contingent consideration liabilities — — (21) (21) (1) See Note 11 . The following table summarizes our financial assets and (liabilities) measured at fair value on a recurring basis as of December 31, 2020: (in millions) Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 209 $ — $ — $ 209 Time Deposits — 203 — 203 Commercial Paper — 200 — 200 Short-term investments: Time deposits — 3 — 3 Equity investment security 27 — — 27 Other current assets: Foreign exchange forward and option contracts — 46 — 46 Long-term investments Restricted time deposits (1) — 405 — 405 Other noncurrent assets: Foreign exchange forward and option contracts — 26 — 26 Accrued expenses and other current liabilities: Foreign exchange forward contracts — (1) — (1) Contingent consideration liabilities — — (11) (11) Other noncurrent liabilities: Contingent consideration liabilities — — (43) (43) (1) See Note 11
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	The following table summarizes the changes in Level 3 contingent consideration liabilities: (in millions) 2021 2020 Beginning balance $ 54 $ 38 Initial measurement recognized at acquisition 24 42 Change in fair value recognized in SG&A expenses (30) (23) Payments and other adjustments (13) (3) Ending balance $ 35 $ 54

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Changes in "Accumulated other comprehensive income (loss)" by component were as follows for the year ended December 31, 2021: 2021 (in millions) Before Tax Tax Net of Tax Foreign currency translation adjustments: Beginning balance $ 56 $ (1) $ 55 Change in foreign currency translation adjustments (78) 3 (75) Ending balance $ (22) $ 2 $ (20) Unrealized gains on cash flow hedges: Beginning balance $ 67 $ (12) $ 55 Unrealized gains arising during the period 67 (13) 54 Reclassifications of net (gains) to: Cost of revenues (55) 10 (45) SG&A expenses (8) 1 (7) Net change 4 (2) 2 Ending balance $ 71 $ (14) $ 57 Accumulated other comprehensive income (loss): Beginning balance $ 123 $ (13) $ 110 Other comprehensive income (loss) (74) 1 (73) Ending balance $ 49 $ (12) $ 37 Changes in "Accumulated other comprehensive income (loss)" by component were as follows for the years ended December 31, 2020 and 2019: 2020 2019 (in millions) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Foreign currency translation adjustments: Beginning balance $ (63) $ (1) $ (64) $ (108) $ 5 $ (103) Change in foreign currency translation adjustments 119 — 119 45 (6) 39 Ending balance $ 56 $ (1) $ 55 $ (63) $ (1) $ (64) Unrealized (losses) on available-for-sale investment securities: Beginning balance $ — $ — $ — $ (12) $ 4 $ (8) Net unrealized gains arising during the period — — — 13 (4) 9 Reclassification of net (gains) to Other, net — — — (1) — (1) Net change — — — 12 (4) 8 Ending balance $ — $ — $ — $ — $ — $ — Unrealized gains (losses) on cash flow hedges: Beginning balance $ 31 $ (5) $ 26 $ (4) $ 1 $ (3) Unrealized gains arising during the period 39 (8) 31 39 (7) 32 Reclassifications of net (gains) to: Cost of revenues (3) 1 (2) (3) 1 (2) SG&A expenses — — — (1) — (1) Net change 36 (7) 29 35 (6) 29 Ending balance $ 67 $ (12) $ 55 $ 31 $ (5) $ 26 Accumulated other comprehensive income (loss): Beginning balance $ (32) $ (6) $ (38) $ (124) $ 10 $ (114) Other comprehensive income (loss) 155 (7) 148 92 (16) 76 Ending balance $ 123 $ (13) $ 110 $ (32) $ (6) $ (38)

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Schedule Of Allocation Of Total Stock-Based Compensation Expense	The allocation of total stock-based compensation expense between cost of revenues and selling, general and administrative expenses as well as the related income tax benefit were as follows for the three years ended December 31: (in millions) 2021 2020 2019 Cost of revenues $ 49 $ 51 $ 54 SG&A expenses 197 181 163 Total stock-based compensation expense $ 246 $ 232 $ 217 Income tax benefit $ 59 $ 48 $ 39
Summary Of The Activity For Restricted Stock Units	A summary of the activity for RSUs granted under our stock-based compensation plans as of December 31, 2021 and changes during the year then ended is presented below: Number of Weighted Average Unvested at January 1, 2021 4.4 $ 64.09 Granted 3.5 74.66 Vested (3.0) 67.50 Forfeited (1.0) 67.23 Unvested at December 31, 2021 3.9 $ 70.11
Summary Of The Activity For Performance Stock Units	The presentation reflects the number of PSUs at the maximum performance milestones. Number of Weighted Average Unvested at January 1, 2021 1.7 $ 62.60 Granted 1.2 73.38 Vested — — Forfeited (0.5) 67.11 Adjustment at the conclusion of the performance measurement period (0.1) 61.83 Unvested at December 31, 2021 2.3 $ 67.55
Schedule Of Assumptions Used To Calculate The Fair Value Of Option Grants	The fair values of the options granted under the Purchase Plan, were estimated at the date of grant during the years ended December 31, 2021, 2020, and 2019 based upon the following assumptions and were as follows: 2021 2020 2019 Dividend yield 1.3 % 1.1 % 1.3 % Weighted average volatility factor 27.5 % 35.9 % 24.9 % Weighted average risk-free interest rate 0.03 % 0.6 % 2.2 % Weighted average expected life (in years) 0.25 0.25 0.25 Weighted average grant date fair value $ 11.72 $ 9.38 $ 9.82

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Segment Operating Profit	Segment operating profits by reportable segment were as follows: (in millions) 2021 2020 2019 Financial Services $ 1,740 $ 1,449 $ 1,605 Healthcare 1,551 1,383 1,261 Products and Resources 1,325 1,078 1,028 Communications, Media and Technology 941 794 732 Total segment operating profit 5,557 4,704 4,626 Less: unallocated costs 2,731 2,590 2,173 Income from operations $ 2,826 $ 2,114 $ 2,453
Long-Lived Assets By Geographic Area	Long-lived assets by geographic area are as follows: (in millions) 2021 2020 2019 Long-lived Assets: (1) North America (2) $ 377 $ 399 $ 445 Europe 75 88 104 Rest of World (3) 719 764 760 Total $ 1,171 $ 1,251 $ 1,309 (1) Long-lived assets include property and equipment, net of accumulated depreciation and amortization. (2) Substantially all relates to the United States. (3) Substantially all relates to India.

Business Description and Summ_3

Business Description and Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Assets	$ 17,852	$ 16,923
Share-based Payment Arrangement [Member] | Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share - less than	1,000	1,000	1,000

Business Description and Summ_4

Business Description and Summary of Significant Accounting Policies Change in Accounting Policy of Correction of an Error (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liabilities	$ 5,861	$ 6,087
Retained earnings	11,922	10,689
Trade accounts receivable, net	3,557	3,087
Assets	$ 17,852	$ 16,923
Cumulative Effect, Period of Adoption, Adjustment [Member] | Trade Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade accounts receivable, net			$ 1
Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			$ 1	$ 2

Revenues (Details)

Revenues (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Revenues [Abstract]
Reduction in revenue due to proposed exit	$ 118
Reduction to additional expenses due to proposed exit	$ 33

Revenues Capitalized Costs to F

Revenues Capitalized Costs to Fulfill Contract with Customer (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues [Abstract]
Beginning Balance	$ 467	$ 485
Amortization expense	118	102
Costs Capitalized	56	98
Ending Balance	394	467
Capitalized Contract Cost, Impairment Loss	$ (11)	$ (14)

Revenues Significant Movements

Revenues Significant Movements in Contract Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues [Abstract]
Beginning Balance	$ 315	$ 334
Revenues recognized during the period but not billed	275	289
Amounts reclassified to accounts receivable	280	308
Ending Balance	$ 310	$ 315

Revenues Significant Movement_2

Revenues Significant Movements in Deferred Revenue Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues [Abstract]
Beginning Balane	$ 419	$ 336
Amounts billed but not recognized as revenues	413	368
Revenues recognized related to the beginning balance of deferred revenue	389	285
Ending Balance	$ 443	$ 419

Revenues Remaining Performance

Revenues Remaining Performance Obligations Narrative (Details) $ in Millions	Dec. 31, 2021USD ($)
Revenues [Abstract]
Revenue, Remaining Performance Obligation	$ 1,586
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	2 years
Revenue, Remaining Performance Obligation, Percentage	80.00%

Revenues Disaggregation of Reve

Revenues Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 18,507	$ 16,652	$ 16,783
Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	9,140	8,561	8,656
Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	7,337	6,125	6,090
Transaction Or Volume-Based [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,030	1,966	2,037
North America [Member]
Disaggregation of Revenue [Line Items]
Revenues	13,636	12,581	12,726
United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,642	1,335	1,313
Europe, excluding United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,919	1,653	1,691
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,561	2,988	3,004
Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,310	1,083	1,053
Consulting And Technology Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	11,587	10,182	9,946
Outsourcing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,920	6,470	6,837
Financial Services
Disaggregation of Revenue [Line Items]
Revenues	6,051	5,621	5,869
Financial Services | Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,613	3,548	3,651
Financial Services | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,063	1,736	1,922
Financial Services | Transaction Or Volume-Based [Member]
Disaggregation of Revenue [Line Items]
Revenues	375	337	296
Financial Services | North America [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,204	4,013	4,137
Financial Services | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	547	463	484
Financial Services | Europe, excluding United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	745	629	728
Financial Services | Europe [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,292	1,092	1,212
Financial Services | Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues	555	516	520
Financial Services | Consulting And Technology Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,079	3,691	3,782
Financial Services | Outsourcing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,972	1,930	2,087
Healthcare
Disaggregation of Revenue [Line Items]
Revenues	5,337	4,852	4,695
Healthcare | Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,063	1,950	1,845
Healthcare | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,157	1,777	1,635
Healthcare | Transaction Or Volume-Based [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,117	1,125	1,215
Healthcare | North America [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,571	4,181	4,147
Healthcare | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	168	157	130
Healthcare | Europe, excluding United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	477	434	341
Healthcare | Europe [Member]
Disaggregation of Revenue [Line Items]
Revenues	645	591	471
Healthcare | Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues	121	80	77
Healthcare | Consulting And Technology Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,090	2,786	2,564
Healthcare | Outsourcing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,247	2,066	2,131
Products and Resources
Disaggregation of Revenue [Line Items]
Revenues	4,276	3,696	3,770
Products and Resources | Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,785	1,548	1,632
Products and Resources | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,085	1,741	1,730
Products and Resources | Transaction Or Volume-Based [Member]
Disaggregation of Revenue [Line Items]
Revenues	406	407	408
Products and Resources | North America [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,937	2,650	2,678
Products and Resources | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	471	371	380
Products and Resources | Europe, excluding United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	539	413	453
Products and Resources | Europe [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,010	784	833
Products and Resources | Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues	329	262	259
Products and Resources | Consulting And Technology Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,725	2,249	2,295
Products and Resources | Outsourcing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,551	1,447	1,475
Communication, Media and Technology [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,843	2,483	2,449
Communication, Media and Technology [Member] | Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,679	1,515	1,528
Communication, Media and Technology [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,032	871	803
Communication, Media and Technology [Member] | Transaction Or Volume-Based [Member]
Disaggregation of Revenue [Line Items]
Revenues	132	97	118
Communication, Media and Technology [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,924	1,737	1,764
Communication, Media and Technology [Member] | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	456	344	319
Communication, Media and Technology [Member] | Europe, excluding United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenues	158	177	169
Communication, Media and Technology [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Revenues	614	521	488
Communication, Media and Technology [Member] | Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues	305	225	197
Communication, Media and Technology [Member] | Consulting And Technology Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,693	1,456	1,305
Communication, Media and Technology [Member] | Outsourcing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 1,150	$ 1,027	$ 1,144

Revenues Trade Accounts Receiva

Revenues Trade Accounts Receivable and Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Beginning Balance	$ 57	$ 67	$ 78
Provision for expected credit losses	6	8	(11)
Write-offs charged against the allowance	(13)	(17)	0
Ending Balance	$ 50	57	67
Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Beginning Balance		$ (1)
Ending Balance			$ (1)

Business Combinations (Narrativ

Business Combinations (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Combinations [Abstract]
Revenue from acquisitions	$ 301	$ 222
Business Acquisition [Line Items]
Revenue from acquisitions	$ 301	$ 222
Code Zero [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Lev [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
EI-Technologies [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Collaborative Solutions [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
New Signature [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Tin Roof [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
10th Magnitude [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Bright Wolf [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Inawisdom [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Linium [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Magenic [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Servian [Member]
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
ESG Mobility
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
TQS
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Hunter
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Devbridge
Business Combinations [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%

Business Combinations Allocatio

Business Combinations Allocation of Purchase Price (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Cash	$ 54	$ 35
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	91	89
Property, plant and equipment and other noncurrent assets	28	30
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	54	32
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	279	492
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	368	498
Current liabilities	(83)	(96)
Noncurrent liabilities	(117)	(35)
Purchase price	1,049	1,201
Business Combination, Contingent Consideration, Liability		42
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 372	$ 145
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years 9 months 18 days	9 years 9 months 18 days
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 3	$ 11
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 9 months 18 days	5 years 4 months 24 days
Devbridge
Business Acquisition [Line Items]
Cash	$ 7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	12
Property, plant and equipment and other noncurrent assets	5
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	11
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	41
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	140
Current liabilities	(11)
Noncurrent liabilities	(9)
Purchase price	268
Devbridge | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	72
Devbridge | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	0
Servian [Member]
Business Acquisition [Line Items]
Cash	4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	15
Property, plant and equipment and other noncurrent assets	6
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	184
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	0
Current liabilities	(12)
Noncurrent liabilities	(29)
Purchase price	252
Servian [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	77
Servian [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	2
Magenic [Member]
Business Acquisition [Line Items]
Cash	13
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	17
Property, plant and equipment and other noncurrent assets	4
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	137
Current liabilities	(29)
Noncurrent liabilities	(7)
Purchase price	246
Magenic [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	90
Magenic [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	1
ESG Mobility
Business Acquisition [Line Items]
Cash	28
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	30
Property, plant and equipment and other noncurrent assets	8
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	27
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	26
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	24
Current liabilities	(22)
Noncurrent liabilities	(66)
Purchase price	132
ESG Mobility | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	77
ESG Mobility | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	0
Linium [Member]
Business Acquisition [Line Items]
Cash	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	5
Property, plant and equipment and other noncurrent assets	1
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	57
Current liabilities	(2)
Noncurrent liabilities	0
Purchase price	85
Linium [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	24
Linium [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	0
Acquisitions
Business Acquisition [Line Items]
Cash	2	$ 10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	12	21
Property, plant and equipment and other noncurrent assets	4	15
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset	1	13
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill	18	66
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill	10	92
Current liabilities	(7)	(23)
Noncurrent liabilities	(6)	(15)
Purchase price	66	202
Acquisitions | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	32	21
Acquisitions | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 0	2
Collaborative Solutions [Member]
Business Acquisition [Line Items]
Cash		10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		38
Property, plant and equipment and other noncurrent assets		6
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset		6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill		44
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill		281
Current liabilities		(25)
Noncurrent liabilities		(5)
Purchase price		400
Collaborative Solutions [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired		37
Collaborative Solutions [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired		8
New Signature [Member]
Business Acquisition [Line Items]
Cash		13
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		13
Property, plant and equipment and other noncurrent assets		6
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset		7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill		292
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill		0
Current liabilities		(20)
Noncurrent liabilities		(8)
Purchase price		312
New Signature [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired		8
New Signature [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired		1
Tin Roof [Member]
Business Acquisition [Line Items]
Cash		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		10
Property, plant and equipment and other noncurrent assets		1
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset		2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill		86
Current liabilities		(13)
Noncurrent liabilities		(2)
Purchase price		153
Tin Roof [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired		69
Tin Roof [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired		0
10th Magnitude [Member]
Business Acquisition [Line Items]
Cash		2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		7
Property, plant and equipment and other noncurrent assets		2
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed. Operating Lease Right Of Use Asset		4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Non-Deductible Goodwill		90
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tax-Deductible Goodwill		39
Current liabilities		(15)
Noncurrent liabilities		(5)
Purchase price		134
10th Magnitude [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired		10
10th Magnitude [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Intangible assets acquired		0
Business Acquisitions Total
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 59

Restructuring Charges (Details)

Restructuring Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Realignment Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 42	$ 169
2020 Fit for Growth [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 173	$ 48

Investments Short-term and Long

Investments Short-term and Long-term investments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Marketable Securities [Line Items]
Short-term Investments	$ 927	$ 44
Long-term investments	463	440
Equity Method Investments	63	31	$ 66
Short-term Investments [Member]
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity, Current	37	14
Debt Securities, Time Deposits	554	3
Equity Securities, FV-NI, Current	26	27
Debt Securities, Available-for-sale	310	0
Long-term investments [Member]
Marketable Securities [Line Items]
Equity and Cost Method Investments		35
Restricted Investments	397	$ 405
Equity Method Investments	$ 66

Investments Available-for-sale

Investments Available-for-sale securities - proceeds from sales, gross gains and losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 0	$ 0	$ 1,712
Gross Gains	0	0	6
Gross Losses	0	0	(5)
Debt Securities, Available-for-sale, Realized Gain (Loss), Total	0	$ 0	$ 1
Debt Securities, Available-for-sale, Amortized Cost	$ 310

Investments Held-to-maturity se

Investments Held-to-maturity securities - amortized cost, gross unrealized gains and losses and fair value (Details) - Short-term Investments [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Current	$ 37	$ 14
Fair Value	37	14
Corporate And Other Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Current	17	14
Fair Value	17	14
Commercial Paper [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Current	20	0
Fair Value	$ 20	$ 0

Investments Held-to-maturity _2

Investments Held-to-maturity securities in a continuous unrealized loss position (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Fair value, 12 months or more	$ 0
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value		$ 0
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value		$ 0
Maximum [Member]
Schedule of Held-to-maturity Securities [Line Items]
Total unrealized losses	(1)
Corporate And Other Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Fair value, less than 12 months	17
Commercial Paper [Member]
Schedule of Held-to-maturity Securities [Line Items]
Fair value, less than 12 months	$ 10

Investments Equity Method Inves

Investments Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Equity Method Investments		$ 63	$ 31	$ 66
Equity Method Investment, Impairment	$ 57
Equity Securities without Readily Determinable Fair Value, Amount		$ 3	$ 4

Property and Equipment, net (Na

Property and Equipment, net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance Lease, Right-of-Use, before Accumulated Amortization	$ 24	$ 37
Finance Lease, Right-of-Use Asset, Accumulated Amortization	17	23
Finance Lease, Right-of-Use Asset, Amortization	7	7	$ 11
Capitalized Computer Software, Gross	201	159
Capitalized Computer Software, Accumulated Amortization	106	73
Capitalized Computer Software, Amortization	33	30	22
Property, Plant and Equipment [Member]
Depreciation	$ 392	$ 407	$ 363

Property and Equipment, net (Sc

Property and Equipment, net (Schedule Of Property And Equipment, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 3,667	$ 3,573
Accumulated depreciation and amortization	(2,496)	(2,322)
Property and equipment, net	1,171	1,251	$ 1,309
Finance Lease, Right-of-Use Asset, Accumulated Amortization	17	23
Finance Lease, Right-of-Use Asset, Amortization	7	7	11
Capitalized Computer Software, Amortization	$ 33	30	$ 22
Buildings [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	30 years
Property and Equipment, gross	$ 777	783
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 638	636
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	3 years
Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	5 years
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 926	840
Computer Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	3 years
Computer Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	8 years
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 772	761
Furniture and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	5 years
Furniture and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	9 years
Land [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 7	7
Capital Work-in-Progress [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	116	122
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 431	$ 424

Leases (Details)

Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 293	$ 302	$ 264
Variable lease cost	10	14	18
Short term lease rental expense	22	$ 20	$ 16
Amount of operating leases not yet commenced	$ 88
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lease terms of leases not yet commenced	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lease terms of leases not yet commenced	15 years

Leases Schedule of Leases State

Leases Schedule of Leases Statement of Financial Position (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease assets, net	$ 933	$ 1,013
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
ROU finance lease assets	$ 7	$ 14
Total leased assets	940	1,027
Current
Operating lease liabilities	195	211
Finance lease	8	11
Noncurrent
Operating lease liabilities, noncurrent	$ 783	$ 846
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Finance lease	$ 5	$ 11
Total leased liabilities	991	1,079
Operating lease cost	293	302	$ 264
Variable lease cost	10	14	$ 18
Lessee, Lease, Description [Line Items]
Finance lease	8	11
Finance lease	5	11
ROU finance lease assets	$ 7	$ 14
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities

Leases Schedule of Operating Le

Leases Schedule of Operating Lease Term and Discount Rate (Details)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Weighted average remaining lease term	6 years 6 months	6 years 2 months 12 days
Weighted average discount rate	5.40%	5.70%

Leases Schedule of Cash Flow an

Leases Schedule of Cash Flow and Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 274	$ 271	$ 232
ROU assets obtained in exchange for operating lease liabilities	$ 100	$ 273	$ 274

Leases Schedule of Future minim

Leases Schedule of Future minimum Payments on Operating Leases (Details) $ in Millions	Dec. 31, 2021USD ($)
Leases [Abstract]
2020	$ 241
2021	197
2022	161
2023	138
2024	112
Thereafter	318
Total operating lease payments	1,167
Interest	(189)
Total operating lease liabilities	$ 978

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets, net (Schedule Of Goodwill Allocation By Reportable Segments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 5,031	$ 3,979
Additions	638	988
Foreign currency translation adjustments	(49)	64
Goodwill, Ending Balance	5,620	5,031
Financial Services
Goodwill [Roll Forward]
Goodwill, Beginning Balance	932	700
Additions	198	204
Foreign currency translation adjustments	(21)	28
Goodwill, Ending Balance	1,109	932
Healthcare
Goodwill [Roll Forward]
Goodwill, Beginning Balance	2,755	2,595
Additions	84	149
Foreign currency translation adjustments	(8)	11
Goodwill, Ending Balance	2,831	2,755
Products and Resources
Goodwill [Roll Forward]
Goodwill, Beginning Balance	780	417
Additions	200	346
Foreign currency translation adjustments	(13)	17
Goodwill, Ending Balance	967	780
Communications, Media and Technology
Goodwill [Roll Forward]
Goodwill, Beginning Balance	564	267
Additions	156	289
Foreign currency translation adjustments	(7)	8
Goodwill, Ending Balance	$ 713	$ 564

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets, net (Schedule Of Components For Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (999)	$ (827)
Intangible Assets, Gross (Excluding Goodwill)	2,217	1,873
Intangible assets, net	1,218	1,046
Indefinite lived trademarks	72	72
Amortization of intangibles	182	152	$ 162
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,679	1,333
Accumulated amortization	(610)	(490)
Net carrying amount	1,069	843
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	385	388
Accumulated amortization	(330)	(286)
Net carrying amount	55	102
Trademarks and other
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	81	80
Accumulated amortization	(59)	(51)
Net carrying amount	$ 22	$ 29

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets, net (Schedule Of Estimated Amortization Expense) (Details) $ in Millions	Dec. 31, 2021USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 186
2021	144
2024	132
2022	139
2023	$ 136

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities (Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accrued Expenses And Other Current Liabilities [Abstract]
Compensation and benefits	$ 1,601	$ 1,607
Customer volume and other incentives	242	266
Income taxes	74	34
Professional fees	220	143
Other	395	469
Accrued expenses and other current liabilities	$ 2,532	$ 2,519

Debt (Details)

Debt (Details) $ in Millions, ₨ in Billions	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2021INR (₨)	Nov. 30, 2018USD ($)
Credit Agreement [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Principal amount of debt			$ 750
Base Rate [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Eurocurrency [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.875%
Risk Free Rate | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.875%
Minimum [Member] | Eurocurrency [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Minimum [Member] | Eurocurrency Without Debt Ratings [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.875%
Minimum [Member] | Risk Free Rate | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Minimum [Member] | Risk Free Rate Without Debt Ratings | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.875%
Maximum [Member]
Debt Instrument [Line Items]
Financial covenant, leverage ratio	3.50
Debt Instrument, Covenant Compliance, Leverage Ratio Following Material Acquisition(s)	3.75
Maximum [Member] | Eurocurrency [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Maximum [Member] | Eurocurrency Without Debt Ratings [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Maximum [Member] | Risk Free Rate | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Maximum [Member] | Risk Free Rate Without Debt Ratings | Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Revolving Credit Facility [Member] | Credit Agreement [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity			$ 1,750
Working Capital Facility [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	$ 175	₨ 13

Debt (Short-Term Debt (Details)

Debt (Short-Term Debt (Details) - Credit Agreement [Member] - Term Loan [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Term Loan - Current Maturities	$ 38	$ 38
Weighted average interest rate	1.00%	1.00%

Debt (Long-Term Debt) (Details)

Debt (Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt, net of current maturities	$ 626	$ 663
Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Net	(2)	(2)
Term Loan [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term debt	666	703
Less: Current portion	$ (38)	$ (38)

Debt (Debt Maturities) (Details

Debt (Debt Maturities) (Details) - Credit Agreement [Member] - Term Loan [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
2020	$ 38
2021	628
Long-term debt	$ 666	$ 703

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income Tax Expense (Benefit)			$ 693	$ 704	$ 643
Deferred income taxes related to MAT			$ 16	98
Incentive period for SEZs, years			15 years
Income tax holiday, increase in net income			$ 36	$ 48	$ 90
Increase in diluted EPS			$ 0.07	$ 0.09	$ 0.16
Accrued interest and penalties			$ 30	$ 22
Effective Income Tax Rate Reconciliation, Discrete Tax Benefit, Amount	$ 14		14	$ 0	$ 0
Tax on Accumulated Indian Earnings [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income Tax Expense (Benefit)		$ 140
Ministry of Finance, India [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrepatriated foreign earnings					5,200
Internal Revenue Service (IRS) [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Net operating loss carryforward			114
Foreign Tax Authority [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Net operating loss carryforward			$ 117
Foreign Tax Authority [Member] | Ministry of Finance, India [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
One-time income tax expense					$ 21

Income Taxes (Schedule Of Incom

Income Taxes (Schedule Of Income Before Provision For Income Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
United States	$ 818	$ 814	$ 931
Foreign	2,009	1,282	1,612
Income before provision for income taxes	$ 2,827	$ 2,096	$ 2,543

Income Taxes ITD Dispute (Detai

Income Taxes ITD Dispute (Details) $ in Millions, ₨ in Billions	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2021INR (₨)	Apr. 30, 2018INR (₨)	Mar. 31, 2018INR (₨)
One-time Transaction [Table] [Line Items]
Income Tax Expense (Benefit)	$ 693	$ 704	$ 643
Long-term investments [Member]
One-time Transaction [Table] [Line Items]
Restricted Investments	397	405
Foreign Tax Authority [Member] | Ministry of Finance, India [Member] | 2016 India Cash Remittance [Member]
One-time Transaction [Table] [Line Items]
Foreign Earnings Repatriated				$ 2,800
Income Tax Expense (Benefit)				$ 135
Income Tax, Disputed Amount	443							₨ 33
Deposits Assets | ₨							₨ 5
Deposits Assets, Percent Disputed Tax Amount							15.00%
Foreign Tax Authority [Member] | Ministry of Finance, India [Member] | 2016 India Cash Remittance [Member] | Other Current Assets
One-time Transaction [Table] [Line Items]
Deposits Assets	67	68
Foreign Tax Authority [Member] | Ministry of Finance, India [Member] | 2016 India Cash Remittance [Member] | Long-term investments [Member]
One-time Transaction [Table] [Line Items]
Restricted Investments	$ 397	$ 405				₨ 30
Foreign Tax Authority [Member] | Ministry of Finance, India [Member] | 2013 India Share Repurchase [Member]
One-time Transaction [Table] [Line Items]
Foreign Earnings Repatriated					$ 523

Income Taxes (Schedule Of Compo

Income Taxes (Schedule Of Components Of Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal and state	$ 210	$ 137	$ 549
Foreign	456	383	400
Total current provision	666	520	949
Deferred:
Federal and state	(50)	(77)	(320)
Foreign	77	261	14
Total deferred provision (benefit)	27	184	(306)
Total provision for income taxes	$ 693	$ 704	$ 643

Income Taxes (Reconciliation Be

Income Taxes (Reconciliation Between Effective Income Tax Rate And U.S. Federal Statutory Rate) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Tax expense, at U.S. federal statutory rate, amount		$ 594	$ 440	$ 534
State and local income taxes, net of federal benefit, amount		50	52	59
Non-taxable income for Indian tax purposes, amount		(36)	(48)	(90)
Rate differential on foreign earnings, amount		137	178	145
Net impact related to the India Tax Law		0	0	21
Recognition of previously unrecognized income tax benefits related to uncertain tax positions	$ (14)	(14)	0	0
Credits and other incentives, amount		(42)	(51)	(57)
Effective Income Tax Rate Reconciliation, Reversal of Indefinite Reinvestment Assertion, Amount		0	140	0
Other adjustments, amount		4	(7)	31
Total provision for income taxes		$ 693	$ 704	$ 643
Tax expense, at U.S. federal statutory rate, percentage		21.00%	21.00%	21.00%
State and local income taxes, net of federal benefit, percentage		1.80%	2.50%	2.30%
Non-taxable income for Indian tax purposes, percentage		(1.30%)	(2.30%)	(3.50%)
Rate differential on foreign earnings, percentage		4.80%	8.50%	5.70%
Net impact related to the India Tax Law, percentage		0.00%	0.00%	0.80%
Recognition of previously unrecognized income tax benefits related to uncertain tax positions, percentage		(0.50%)	0.00%	0.00%
Credits and other incentives, percent		(1.50%)	(2.40%)	(2.20%)
Effective Income Tax Rate Reconciliation, Reversal of Indefinite Reinvestment Assertion, Percent		0.00%	6.60%	0.00%
Other adjustments, percent		0.20%	(0.30%)	1.20%
Total provision for income taxes, percentage		24.50%	33.60%	25.30%

Income Taxes (Schedule Of Defer

Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Net operating losses	$ 52	$ 36
Revenue recognition	116	41
Compensation and benefits	230	259
Minimum alternative tax (MAT) and other credits	27	109
Expenses not currently deductible	121	147
Deferred income tax assets, gross	546	592
Less valuation allowance	(46)	(29)
Deferred income tax assets, net	500	563
Deferred income tax liabilities:
Depreciation and amortization	202	198
Deferred Tax Liabilities, Deferred Expense	84	105
Other	28	21
Deferred income tax liabilities	314	324
Net deferred income tax assets	$ 186	$ 239

Income Taxes (Summary Of Change

Income Taxes (Summary Of Changes In Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in unrecognized income tax benefits
Balance, beginning of year	$ 193	$ 152	$ 117
Additions based on tax positions related to the current year	34	28	22
Additions for tax positions of prior years	16	10	14
Unrecognized Tax Benefits, Increase Resulting from Acquisition	12	3	0
Reductions for tax positions due to lapse of statutes of limitations	(17)	0	0
Reductions for tax positions of prior years	0	0	(1)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	43	0	0
Foreign currency exchange movement	(1)	0	0
Balance, end of year	$ 194	$ 193	$ 152

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash flow hedge losses expected to be reclassified to earnings within the next 12 months	$ 45

Derivative Financial Instrume_4

Derivative Financial Instruments (Location And Fair Values Of Derivative Financial Instruments In Our Consolidated Statement Of Financial Position) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative assets fair value	$ 69	$ 72
Derivative liabilities fair value	7	1
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative assets fair value	3	1
Derivative liabilities fair value	7	1
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets fair value	3	1
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Accrued Expenses And Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities fair value	7	1
Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative assets fair value	66	71
Derivative liabilities fair value	0	0
Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets fair value	51	45
Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Derivative assets fair value	$ 15	$ 26

Derivative Financial Instrume_5

Derivative Financial Instruments (Notional Value Of Outstanding Cash Flow Hedge Contracts By Year Of Maturity And Net Unrealized (Loss) Gain Included In Accumulated Other Comprehensive Income) (Details) - Designated as Hedging Instrument [Member] - Cash Flow Hedges [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Foreign Exchange Contract, Maturity 2021 [Member]
Derivative [Line Items]
Derivative, notional amount	$ 0	$ 1,470
Foreign Exchange Contract, Maturity 2022 [Member]
Derivative [Line Items]
Derivative, notional amount	1,643	803
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	2,523	2,273
Foreign Exchange Option [Member]
Derivative [Line Items]
Derivative, notional amount	78	133
Foreign Exchange Contract, Maturity 2023
Derivative [Line Items]
Derivative, notional amount	$ 880	$ 0

Derivative Financial Instrume_6

Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Cash Flow Hedge Derivatives Financial Instruments) (Details) - Cash Flow Hedges [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 63	$ 3
Cost of revenues
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	55	3
SG&A expenses
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	8	0
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	$ 67	$ 39

Derivative Financial Instrume_7

Derivative Financial Instruments (Additional Information Related To Outstanding Contracts Not Designated As Hedging Instruments) (Details) - Not Designated as Hedging Instrument [Member] - Foreign Exchange Forward Contracts [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, notional amount	$ 847	$ 637
Market value	$ (4)	$ 0

Derivative Financial Instrume_8

Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Derivative Financial Instruments Not Designated As Hedges) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Foreign Currency Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of net gains (losses) on derivative instruments	$ 13	$ (63)

Fair Value Measurements (Financ

Fair Value Measurements (Financial Assets And (Liabilities) Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability		$ (42)
Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI, Current	$ 26	27
Debt Securities, Available-for-sale	310	0
Long-term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments	397	405
Fair Value, Recurring [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI, Current	26	27
Debt Securities, Available-for-sale	310
Fair Value, Recurring [Member] | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	54	46
Fair Value, Recurring [Member] | Accrued Expenses And Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	(7)	(1)
Business Combination, Contingent Consideration, Liability	(14)	(11)
Fair Value, Recurring [Member] | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	15	26
Fair Value, Recurring [Member] | Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	(21)	(43)
Fair Value, Recurring [Member] | Long-term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments	397	405
Fair Value, Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	507	209
Fair Value, Recurring [Member] | Bank Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	4	203
Fair Value, Recurring [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	266	200
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI, Current	26	27
Debt Securities, Available-for-sale	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Accrued Expenses And Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Business Combination, Contingent Consideration, Liability	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	507	209
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI, Current	0	0
Debt Securities, Available-for-sale	310
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	54	46
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Accrued Expenses And Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	(7)	(1)
Business Combination, Contingent Consideration, Liability	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	15	26
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Long-term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments	397	405
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Bank Time Deposits [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	4	203
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Paper [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	266	200
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI, Current	0	0
Debt Securities, Available-for-sale	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Accrued Expenses And Other Current Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Business Combination, Contingent Consideration, Liability	(14)	(11)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	(21)	(43)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Bank Time Deposits [Member] | Fair Value, Recurring [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	554	3
Bank Time Deposits [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	$ 554	$ 3

Fair Value Measurements (Level

Fair Value Measurements (Level 3 Contingent Consideration Liabilities) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 54	$ 38
Initial measurement recognized at acquisition	24	42
Change in fair value recognized in SG&A expenses	(30)	(23)
Payments and other adjustments	(13)	(3)
Ending balance	$ 35	$ 54

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, beginning balance		$ 10,836	$ 11,022		$ 11,424
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Other comprehensive income (loss)		(73)	148		76
AOCI, ending balance		11,991	10,836		11,022
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		0	0		8
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, beginning balance			1	[1]	2	[2]
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
AOCI, ending balance	[1]				1
Foreign currency translation adjustments:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, beginning balance		56	(63)		(108)
AOCI Tax, beginning balance		(1)	(1)		5
AOCI, beginning balance		55	(64)		(103)
Other Comprehensive Income (Loss), before Tax [Abstract]
Other Comprehensive Income (Loss), before Tax		(78)	119		45
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Tax		3	0		(6)
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Other comprehensive income (loss)			119		39
AOCI before Tax, ending balance		(22)	56		(63)
AOCI Tax, ending balance		2	(1)		(1)
AOCI, ending balance		(20)	55		(64)
Unrealized (losses) on available-for-sale investment securities:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, beginning balance		0	0		(12)
AOCI Tax, beginning balance		0	0		4
AOCI, beginning balance		0	0		(8)
Other Comprehensive Income (Loss), before Tax [Abstract]
OCI, before Reclassifications, before Tax			0		13
Reclassification from AOCI, Current Period, before Tax			0		(1)
Other Comprehensive Income (Loss), before Tax			0		12
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss) before Reclassifications, Tax			0		(4)
Reclassification from AOCI, Current Period, Tax			0		0
Other Comprehensive Income (Loss), Tax			0		(4)
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
OCI, before Reclassifications, Net of Tax			0		9
Reclassification from AOCI, Current Period, Net of Tax			0		(1)
Other comprehensive income (loss)			0		8
AOCI before Tax, ending balance			0		0
AOCI Tax, ending balance			0		0
AOCI, ending balance			0		0
Unrealized gains on cash flow hedges:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, beginning balance		67	31		(4)
AOCI Tax, beginning balance		(12)	(5)		1
AOCI, beginning balance		55	26		(3)
Other Comprehensive Income (Loss), before Tax [Abstract]
OCI, before Reclassifications, before Tax		67	39		39
Other Comprehensive Income (Loss), before Tax		4	36		35
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss) before Reclassifications, Tax		(13)	(8)		(7)
Other Comprehensive Income (Loss), Tax		(2)	(7)		(6)
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
OCI, before Reclassifications, Net of Tax		54	31		32
Other comprehensive income (loss)		2	29		29
AOCI before Tax, ending balance		71	67		31
AOCI Tax, ending balance		(14)	(12)		(5)
AOCI, ending balance		57	55		26
Accumulated other comprehensive income (loss):
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI before Tax, beginning balance		123	(32)		(124)
AOCI Tax, beginning balance		(13)	(6)		10
AOCI, beginning balance		110	(38)		(114)
Other Comprehensive Income (Loss), before Tax [Abstract]
Other Comprehensive Income (Loss), before Tax		(74)	155		92
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Tax		1	(7)		(16)
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Other comprehensive income (loss)		(73)	148		76
AOCI before Tax, ending balance		49	123		(32)
AOCI Tax, ending balance		(12)	(13)		(6)
AOCI, ending balance		37	110		(38)
Cost of revenues | Unrealized gains on cash flow hedges:
Other Comprehensive Income (Loss), before Tax [Abstract]
Reclassification from AOCI, Current Period, before Tax		(55)	(3)		(3)
Other Comprehensive Income (Loss), Tax [Abstract]
Reclassification from AOCI, Current Period, Tax		10	1		1
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Reclassification from AOCI, Current Period, Net of Tax		(45)	(2)		(2)
SG&A expenses | Unrealized gains on cash flow hedges:
Other Comprehensive Income (Loss), before Tax [Abstract]
Reclassification from AOCI, Current Period, before Tax		(8)	0		(1)
Other Comprehensive Income (Loss), Tax [Abstract]
Reclassification from AOCI, Current Period, Tax		1	0		0
Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Reclassification from AOCI, Current Period, Net of Tax		$ (7)	$ 0		$ (1)
[1]	Reflects the adoption of the Credit Loss Standard on January 1, 2020.
[2]	Reflects    the adoption of the New Lease Standard on January 1, 2019.

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	Sep. 07, 2021	Apr. 20, 2021	Oct. 27, 2020	Sep. 30, 2021
Syntel Sterling Best Shores Mauritius Ltd. [Member]
Other Commitments [Line Items]
Litigation Settlement, Amount Awarded from Other Party		$ 570	$ 855
Litigation Settlement Amount Awarded From Other Party, Punitive Damages		285	$ 570
Litigation Settlement Amount Awarded From Other Party, Actual Damages		$ 285
Consolidated Putative Securities Class Action Member
Other Commitments [Line Items]
FCPA Accrual	$ 95
Directors And Officers Insurance Policy Available Balance	$ 75
Gain (Loss) Related to Litigation Settlement				$ 20

Employee Benefits (Narrative) (

Employee Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Accrued expenses and other current liabilities	$ 2,532	$ 2,519
Gratuity Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan	118	124
Fund assets	212	186
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	70	35	$ 38
India Defined Contribution Obligation [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued expenses and other current liabilities				$ 117
United States and Europe
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	135	118	117
India
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	$ 121	$ 98	$ 101
Employee contribution percentage, maximum	12.00%

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017
2017 Incentive Plan [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares authorized					48.8
Shares available for grant		22.2
Restricted Stock Units [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Weighted Average Grant Date Fair Value, Granted		$ 74.66	$ 61.85	$ 64.12
Unrecognized stock-based compensation expense		$ 233
Weighted average remaining requisite service period		1 year 8 months 12 days
Performance Stock Units [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Weighted Average Grant Date Fair Value, Granted		$ 73.38	$ 62	$ 70.77
Unrecognized stock-based compensation expense		$ 41
Weighted average remaining requisite service period		1 year 7 months 6 days
Employee Stock [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares authorized					40
Shares available for grant		3.9
Vesting period		3 months
Eligible employees purchase percentage of whole share of fair market value		90.00%
Shares issued		2
Fair value of shares issued		$ 23
Employee Stock [Member] | Forecast
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Eligible employees purchase percentage of whole share of fair market value	95.00%
Maximum [Member] | Restricted Stock Units [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting period		3 years
Maximum [Member] | Performance Stock Units [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting period		4 years

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Schedule Of Allocation Of Total Stock-Based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense		$ 232	$ 217
Share-based Payment Arrangement, Noncash Expense	$ 246	232	217
Income tax benefit	59	48	39
Cost of revenues
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	49	51	54
SG&A expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 197	$ 181	$ 163

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans (Schedule Of Assumptions Used To Calculate The Fair Value Of Option Grants) (Details) - Employee Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Dividend yield	1.30%	1.10%	1.30%
Weighted average volatility factor	27.50%	35.90%	24.90%
Weighted average expected life (in years)	3 months	3 months	3 months
Weighted average risk-free interest rate	0.03%	0.60%	2.20%
Weighted average grant date fair value	$ 11.72	$ 9.38	$ 9.82

Stock-Based Compensation Plan_5

Stock-Based Compensation Plans (Summary Of The Activity For Performance Stock Units) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Performance Stock Units [Member]
Number of Units
Number of Units, Unvested at beginning of period	1.7
Number of Units, Granted	1.2
Number of Units, Vested	0
Number of Units, Forfeited	(0.5)
Number of Units, Adjustment at the conclusion of the performance measurement period	0.1
Number of Units, Unvested at end of period	2.3	1.7
Weighted Average Grant Date Fair Value (in dollars)
Weighted Average Grant Date Fair Value, Unvested at beginning of period	$ 62.60
Weighted Average Grant Date Fair Value, Granted	73.38	$ 62	$ 70.77
Weighted Average Grant Date Fair Value, Forfeited	67.11
Weighted Average Grant Date Fair Value, Reduction due to the achievement of lower than maximum performance milestones	61.83
Weighted Average Grant Date Fair Value, Unvested at end of period	$ 67.55	$ 62.60
Unrecognized stock-based compensation expense	$ 41
Weighted average remaining requisite service period	1 year 7 months 6 days
Restricted Stock Units [Member]
Number of Units
Number of Units, Unvested at beginning of period	4.4
Number of Units, Granted	3.5
Number of Units, Vested	(3)
Number of Units, Forfeited	(1)
Number of Units, Unvested at end of period	3.9	4.4
Weighted Average Grant Date Fair Value (in dollars)
Weighted Average Grant Date Fair Value, Unvested at beginning of period	$ 64.09
Weighted Average Grant Date Fair Value, Granted	74.66	$ 61.85	$ 64.12
Weighted Average Grant Date Fair Value, Forfeited	67.23
Weighted Average Grant Date Fair Value, Unvested at end of period	$ 70.11	$ 64.09
Unrecognized stock-based compensation expense	$ 233
Weighted average remaining requisite service period	1 year 8 months 12 days

Stock-Based Compensation Plan_6

Stock-Based Compensation Plans (Summary Of The Activity For Restricted Stock Units) (Details) - Restricted Stock Units [Member] - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Units
Number of Units, Unvested at beginning of period	4.4
Number of Units, Granted	3.5
Number of Units, Vested	(3)
Number of Units, Forfeited	(1)
Number of Units, Unvested at end of period	3.9	4.4
Weighted Average Grant Date Fair Value (in dollars)
Weighted Average Grant Date Fair Value, Unvested at beginning of period	$ 64.09
Weighted Average Grant Date Fair Value, Granted	74.66	$ 61.85	$ 64.12
Weighted Average Grant Date Fair Value, Vested	67.50
Weighted Average Grant Date Fair Value, Forfeited	67.23
Weighted Average Grant Date Fair Value, Unvested at end of period	$ 70.11	$ 64.09

Segment Information (Revenues F

Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Income from operations	$ 2,826	$ 2,114	$ 2,453
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income from operations	5,557	4,704	4,626
Operating Segments [Member] | Financial Services
Segment Reporting Information [Line Items]
Income from operations	1,740	1,449	1,605
Operating Segments [Member] | Healthcare
Segment Reporting Information [Line Items]
Income from operations	1,551	1,383	1,261
Operating Segments [Member] | Products and Resources
Segment Reporting Information [Line Items]
Income from operations	1,325	1,078	1,028
Operating Segments [Member] | Communications, Media and Technology
Segment Reporting Information [Line Items]
Income from operations	941	794	732
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Less: unallocated costs	$ 2,731	$ 2,590	$ 2,173

Segment Information (Revenues A

Segment Information (Revenues And Long-Lived Assets By Geographic Area) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Geographic Areas, Long-Lived Assets
Long-lived assets	$ 1,171	$ 1,251	$ 1,309
North America [Member]
Geographic Areas, Long-Lived Assets
Long-lived assets	377	399	445
Europe [Member]
Geographic Areas, Long-Lived Assets
Long-lived assets	75	88	104
Rest of World [Member]
Geographic Areas, Long-Lived Assets
Long-lived assets	$ 719	$ 764	$ 760

Valuation And Qualifying Acco_2

Valuation And Qualifying Accounts (Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Warranty Accrual [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 32	$ 33	$ 32
Charged to Costs and Expenses	36	32	33
Charged to Other Accounts	3	0	0
Deductions/Other	32	33	32
Balance at End of Period	39	32	33
Valuation Allowance - Deferred Income Tax Assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	29	24	11
Charged to Costs and Expenses	17	5	15
Charged to Other Accounts	0	0	0
Deductions/Other	0	0	2
Balance at End of Period	$ 46	$ 29	$ 24

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Dividends declared per common share (in usd per share)		$ 0.96	$ 0.88	$ 0.80
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends declared per common share (in usd per share)	$ 0.27