Alight (ALIT) POS AM 11 Apr 22 Prospectus update (post-effective amendment) Financial data

Cover Page

Cover Page	12 Months Ended
	Dec. 31, 2021
Cover [Abstract]
Document Type	POS AM
Amendment Flag	false
Entity Registrant Name	Alight, Inc. / Delaware
Entity Central Index Key	0001809104
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current Assets
Cash and cash equivalents	$ 372	$ 506
Receivables, net	515	532
Other current assets	302	163
Total Current Assets Before Fiduciary Assets	1,189	1,201
Fiduciary assets	1,280	1,030
Total Current Assets	2,469	2,231
Goodwill	3,638	2,245
Intangible assets, net	4,170	1,733
Fixed assets, net	236	334
Deferred tax assets, net	3	5
Other assets	472	408
Total Assets	10,988	6,956
Current Liabilities
Accounts payable and accrued liabilities	406	394
Current portion of long term debt	38	37
Other current liabilities	401	324
Total Current Liabilities Before Fiduciary Liabilities	845	755
Fiduciary liabilities	1,280	1,030
Total Current Liabilities	2,125	1,785
Deferred tax liabilities	36
Long term debt	2,830	4,041
Tax receivable agreement	581
Financial instruments	135
Other liabilities	353	447
Total Liabilities	6,060	6,273
Commitments and Contingencies (Note 19)
Stockholders' Equity
Additional paid-in-capital	4,228
Retained deficit	(96)	(127)
Members' equity		852
Accumulated other comprehensive income (loss)	8	(42)
Total Alight, Inc. Equity	4,140	683
Noncontrolling Interest	788
Total Stockholders' Equity	4,928	683
Total Liabilities and Stockholders' Equity	$ 10,988	$ 6,956

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2021	Jul. 02, 2021
Class A Common Stock
Common stock, par value	$ 0.0001
Common stock, shares authorized	1,000,000,000
Common stock, shares issued	464,103,972
Common stock, shares outstanding	464,103,972
Class B Common Stock
Common stock, par value	$ 0.0001
Common stock, shares authorized	20,000,000
Common stock, shares issued	9,980,906
Common stock, shares outstanding	9,980,906
Class V Common Stock
Common stock, par value	$ 0.0001
Common stock, shares authorized	175,000,000
Common stock, shares issued	77,459,687
Common stock, shares outstanding	77,459,687
Class Z Common Stock
Common stock, par value	$ 0.0001
Common stock, shares authorized	12,900,000
Common stock, shares issued	5,595,577	8,671,507
Common stock, shares outstanding	5,595,577

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 1,554	$ 1,361	$ 2,728	$ 2,552
Cost of services, exclusive of depreciation and amortization	1,001
Depreciation and amortization	21
Gross Profit	532
Operating Expenses
Selling, general and administrative	304
Depreciation and intangible amortization	163
Total operating expenses	467
Operating Income	65	102	147	265
Other Expense
Loss from change in fair value of financial instruments	65
Gain from change in fair value of tax receivable agreement	(37)
Interest expense	57	123	234	224
Other expense, net	3	9	7	3
Total other expense, net	88
(Loss) Income Before Income Tax Expense (Benefit)	(23)	(30)	(94)	38
Income tax expense (benefit)	25	(5)	9	16
Net (Loss) Income	(48)
Net loss attributable to noncontrolling interests	(13)
Net (Loss) Income Attributable to Alight, Inc.	$ (35)
Earnings Per Share
Basic net loss per share	$ (0.08)
Diluted net loss per share	$ (0.08)
Other comprehensive (loss) income, net of tax:
Change in fair value of derivatives	$ 9
Total other comprehensive income (loss), net of tax:	9
Comprehensive (Loss) Income Before Noncontrolling Interests	(39)
Comprehensive loss attributable to noncontrolling interests	(12)
Comprehensive (Loss) Income Attributable to Alight, Inc.	$ (27)	6	(120)	(6)
Alight Holdings
Revenue		1,361	2,728	2,552
Cost of services, exclusive of depreciation and amortization		888	1,829	1,619
Depreciation and amortization		38	65	50
Gross Profit		435	834	883
Operating Expenses
Selling, general and administrative		222	461	415
Depreciation and intangible amortization		111	226	203
Total operating expenses		333	687	618
Operating Income		102	147	265
Other Expense
Interest expense		123	234	224
Other expense, net		9	7	3
Total other expense, net		132	241	227
(Loss) Income Before Income Tax Expense (Benefit)		(30)	(94)	38
Income tax expense (benefit)		(5)	9	16
Net (Loss) Income		(25)	(103)	22
Net (Loss) Income Attributable to Alight, Inc.		(25)	(103)	22
Other comprehensive (loss) income, net of tax:
Change in fair value of derivatives		23	(25)	(34)
Foreign currency translation adjustments		8	8	6
Total other comprehensive income (loss), net of tax:		31	(17)	(28)
Comprehensive (Loss) Income Before Noncontrolling Interests		6	(120)	(6)
Comprehensive (Loss) Income Attributable to Alight, Inc.		$ 6	$ (120)	$ (6)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Additional Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Total Alight, Inc. Equity	Noncontrolling Interest
Balance at Dec. 31, 2020	$ 683
Share-based compensation expense	5
Balance at Jun. 30, 2021	4,753	$ 4,014	$ (61)		$ 3,953	$ 800
Net (loss) income	(48)		(35)		(35)	(13)
Other comprehensive income, net	9			$ 8	8	1
Distribution of equity	(1)	(1)			(1)
Warrant redemption	159	159			159
Share-based compensation expense	67	67			67
Shares withheld in lieu of taxes	(11)	(11)			(11)
Balance at Dec. 31, 2021	$ 4,928	$ 4,228	$ (96)	$ 8	$ 4,140	$ 788

Consolidated Statements of Memb

Consolidated Statements of Members' Equity - USD ($) $ in Millions	Total	Common Class A Units	Common Class A-1 Units	Common Class B Units	Accumulated Other Comprehensive (Loss) Income
Balance at Dec. 31, 2018	$ 818	$ 792	$ 16	$ 7	$ 3
Balance, units at Dec. 31, 2018		123,700	1,380	590
Comprehensive (loss) income, net of tax	(6)	$ 22			(28)
Distribution of members' equity	(10)	(10)
Restricted share units vested, net of units withheld in lieu of taxes	(2)		$ (2)
Restricted share units vested, net of units withheld in lieu of taxes, units			410	615
Unit repurchases	(4)		$ (2)	$ (2)
Unit repurchases, units			(107)	(98)
Share-based compensation expense	9		$ 3	$ 6
Balance at Dec. 31, 2019	805	$ 804	$ 15	$ 11	(25)
Balance, units at Dec. 31, 2019		123,700	1,683	1,107
Comprehensive (loss) income, net of tax	(120)	$ (102)	$ (1)		(17)
Distribution of members' equity	(3)	(3)
Restricted share units vested, net of units withheld in lieu of taxes	(1)		$ (1)
Restricted share units vested, net of units withheld in lieu of taxes, units			172	717
Unit repurchases	(3)		$ (2)	$ (1)
Unit repurchases, units			(55)	(88)
Share-based compensation expense	5		$ 1	$ 4
Balance at Dec. 31, 2020	683	$ 699	$ 12	$ 14	(42)
Balance, units at Dec. 31, 2020		123,700	1,800	1,736
Comprehensive (loss) income, net of tax	6	$ (25)			31
Restricted share units vested, net of units withheld in lieu of taxes	(1)		$ (1)
Restricted share units vested, net of units withheld in lieu of taxes, units			92	441
Unit repurchases	(2)		$ (1)	$ (1)
Unit repurchases, units			(75)	(89)
Share-based compensation expense	5		$ 1	$ 4
Balance at Jun. 30, 2021	691	$ 674	$ 11	$ 17	(11)
Balance, units at Jun. 30, 2021		123,700	1,817	2,088
Comprehensive (loss) income, net of tax	(27)
Share-based compensation expense	$ 67
Balance at Dec. 31, 2021					$ (8)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net (loss) income	$ (48)
Adjustments to reconcile net (loss) income to net cash provided by operations:
Depreciation	31	$ 49	$ 91	$ 68
Intangible amortization expense	153	100	200	185
Noncash lease expense	11
Financing fee and premium amortization	(2)
Share-based compensation expense	67	5	5	9
Loss from change in fair value of financial instruments	65
Gain from change in fair value of tax receivable agreement	(37)
Other	11
Change in assets and liabilities:
Receivables	(28)
Accounts payable and accrued liabilities	56
Other assets and liabilities	(222)
Cash provided by operating activities	57
Cash flows from investing activities
Acquisition of businesses, net of cash acquired	(1,793)
Capital expenditures	(59)
Cash used for investing activities	(1,852)
Cash flows from financing activities
Net increase (decrease) in fiduciary liabilities	266
Distributions of equity	(1)
Borrowings from banks	627
Financing fees	(8)
Repayments to banks	(120)
Principal payments on finance lease obligations	(14)
Settlements of interest rate swaps	(8)
Tax payment for shares/units withheld in lieu of taxes	(11)
Contingent consideration payments	(2)
FTAC share redemptions	(142)
Proceeds related to FTAC investors	1,813
Cash provided by (used for) financing activities	2,400
Effect of exchange rate changes on cash, cash equivalents and restricted cash	11
Net increase (decrease) in cash, cash equivalents and restricted cash	616
Cash, cash equivalents and restricted cash at beginning of period	1,036
Cash, cash equivalents and restricted cash at end of period	1,652	1,036
Reconciliation of cash, cash equivalents, and restricted cash to the Consolidated Balance Sheets
Cash and cash equivalents	372		506
Restricted cash included in fiduciary assets	1,280
Total cash, cash equivalents and restricted cash	1,652	1,036
Supplemental disclosures:
Interest paid	64
Income taxes paid	8
Supplemental disclosure of non-cash financing activities:
Fixed asset additions acquired through finance leases	2
Right of use asset additions acquired through operating leases	2
Alight Holdings
Cash flows from operating activities
Net (loss) income		(25)	(103)	22
Adjustments to reconcile net (loss) income to net cash provided by operations:
Depreciation		49	91	68
Intangible amortization expense		100	200	185
Noncash lease expense		10	30	12
Financing fee and premium amortization		9	20	18
Share-based compensation expense		5	5	9
Other		1	11	5
Change in assets and liabilities:
Receivables		51	133	(39)
Accounts payable and accrued liabilities		(45)	(11)	(61)
Other assets and liabilities		(97)	(143)	49
Cash provided by operating activities		58	233	268
Cash flows from investing activities
Acquisition of businesses, net of cash acquired			(52)	(527)
Capital expenditures		(55)	(90)	(77)
Cash used for investing activities		(55)	(142)	(604)
Cash flows from financing activities
Net increase (decrease) in fiduciary liabilities		(15)	263	87
Members' equity unit repurchase		(2)	(3)	(4)
Distributions of equity			(3)	(10)
Borrowings from banks		110	779	483
Financing fees			(23)	(5)
Repayments to banks		(124)	(495)	(120)
Principal payments on finance lease obligations		(17)	(24)	(13)
Settlements of interest rate swaps		(14)	(21)	4
Tax payment for shares/units withheld in lieu of taxes		(1)		(2)
Contingent consideration payments		(1)
Other financing activities			(10)
Cash provided by (used for) financing activities		(64)	463	420
Effect of exchange rate changes on cash, cash equivalents and restricted cash			(3)	1
Net increase (decrease) in cash, cash equivalents and restricted cash		(61)	551	85
Cash, cash equivalents and restricted cash at beginning of period	$ 1,475	1,536	985	900
Cash, cash equivalents and restricted cash at end of period		1,475	1,536	985
Reconciliation of cash, cash equivalents, and restricted cash to the Consolidated Balance Sheets
Cash and cash equivalents		460	506	218
Restricted cash included in fiduciary assets		1,015	1,030	767
Total cash, cash equivalents and restricted cash		1,475	1,536	985
Supplemental disclosures:
Interest paid		112	210	204
Income taxes paid		5	19	9
Supplemental disclosure of non-cash financing activities:
Fixed asset additions acquired through finance leases		2	62	24
Right of use asset additions acquired through operating leases		$ 10	26	$ 58
Non-cash fixed asset additions			$ 26

Basis of Presentation and Natur

Basis of Presentation and Nature of Business	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Nature of Business	1. Basis of Presentation and Nature of Business Foley Trasimene Acquisition Corp. (“FTAC”) was incorporated in Delaware on March 26, 2020. FTAC was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. On July 2, 2021 (the “Closing Date”), FTAC completed the business combination (the “Business Combination”) with Alight Holding Company, LLC (f/k/a Tempo Holding Company, LLC) (“Alight Holdings” or the “Predecessor”) contemplated by the Business Combination Agreement (as amended and restated as of April 29, 2021) between FTAC, Alight Holdings and other interested parties (the “Business Combination Agreement”). On the Closing Date, pursuant to the Business Combination Agreement, FTAC became a wholly owned subsidiary of Alight, Inc. (“Alight”, “the Company”, “we” “us” “our” or the “Successor”) and was renamed Alight Group, Inc. As a result of the Business Combination, and by virtue of such series of mergers and related transactions, the combined company is now organized in an “Up-C” Basis of Presentation As a result of the Business Combination, for accounting purposes, the Company is the acquirer and Alight Holdings is the acquiree and accounting predecessor. While the Closing Date was July 2, 2021, we have determined that as the impact of one day would be immaterial to the results of operations, we will utilize July 1, 2021 as the date of the Business Combination for accounting purposes. Therefore, the financial statement presentation includes the financial statements of Alight Holdings as Predecessor for the periods prior to July 1, 2021 and the Company as Successor for the periods including and after July 1, 2021, including the consolidation of Alight Holdings. Nature of Business We are a leading cloud-based provider of integrated digital human capital and business solutions. We have an unwavering belief that a company’s success starts with its people, and our solutions connect human insights with technology. The Alight Worklife employee engagement platform that provides a seamless customer experience by combining content, plus artificial intelligence (“AI”) and data analytics to enable Alight’s business process as a service (“BPaaS”) model. Our mission-critical solutions enable employees to enrich their health, wealth and wellbeing which helps global organizations achieve a high-performance culture. Our solutions include: • Employer Solutions: AI-led • Professional Services:

Accounting Policies and Practic

Accounting Policies and Practices	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Accounting Policies and Practices	2. Accounting Policies and Practices Use of Estimates The preparation of the accompanying Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of reserves and expenses. These estimates and assumptions are based on management’s best estimates and judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management believes its estimates to be reasonable given the current facts available. Management adjusts such estimates and assumptions when facts and circumstances dictate. Illiquid credit markets, volatile equity markets, and foreign currency exchange rate movements increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be predicted with certainty, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment would, if applicable, be reflected in the financial statements in future periods. Concentration of Risk The Company has no significant off-balance Cash and Cash Equivalents Cash and cash equivalents include cash balances. At December 31, 2021 and December 31, 2020, Cash and cash equivalents totaled $372 million and $506 million, respectively, and none of the balances were restricted as to its use. Fiduciary Assets and Liabilities Some of the Company’s agreements require it to hold funds to pay certain obligations on behalf of its clients. Funds held on behalf of clients are segregated from Company funds, and their use is restricted to the payment of obligations on behalf of clients. There is typically a short period of time between when the Company receives funds and when it pays obligations on behalf of clients. These funds are recorded as Fiduciary assets with the related obligation recorded as Fiduciary liabilities in the Consolidated Balance Sheets. Commissions Receivable Commissions receivable, which is recorded in Other current assets and Other assets in the Consolidated Balance Sheets, are contract assets that represent estimated variable consideration for commissions to be received from insurance carriers for performance obligations that have been satisfied. The current portion of Commissions receivable is expected to be received within one year, while the non-current Allowance for Expected Credit Losses The Company’s allowance for expected credit losses with respect to trade receivables and contract assets is based on a combination of factors, including evaluation of historical write-offs, current conditions and reasonable economic forecasts that affect collectability and other qualitative and quantitative analysis. Receivables, net included an allowance for expected credit losses of $5 million and $15 million at December 31, 2021 and December 31, 2020, respectively. Fixed Assets, Net The Company records fixed assets at cost. We compute depreciation and amortization using the straight-line method on the estimated useful lives of the assets, which are generally as follows: Asset Description Asset Life Capitalized software Lesser of the life of an associated license, or 4 to 7 years Leasehold improvements Lesser of estimated useful life or lease term, not to exceed 10 years Furniture, fixtures and equipment 4 to 10 years Computer equipment 4 to 6 years Goodwill and Intangible Assets, Net In applying the acquisition method of accounting for business combinations, amounts assigned to identifiable assets and liabilities acquired were based on estimated fair values as of the date of acquisition, with the remainder recorded as goodwill. Intangible assets are initially valued at fair value using generally accepted valuation methods appropriate for the type of intangible asset. Intangible assets with definite lives are amortized over their estimated useful lives and are reviewed for impairment if indicators of impairment arise. Goodwill is tested for impairment annually as of October 1, and whenever indicators of impairment arise. Derivatives The Company uses derivative financial instruments, such as interest rate swaps. Interest rate swaps are used to manage interest risk exposures and have been designated as cash flow hedges. The changes in the fair value of derivatives that qualify for hedge accounting as cash flow hedges are recorded in Accumulated other comprehensive income (loss). Amounts are reclassified from Accumulated other comprehensive income (loss) into earnings when the hedge exposure affects earnings. The Company discontinues hedge accounting prospectively when: (1) the derivative expires or is sold, terminated, or exercised; (2) the qualifying criteria are no longer met; or (3) management removes the designation of the hedging relationship. Foreign Currency Certain of the Company’s non-U.S. non-functional Share-Based Compensation Costs Share-based payments, including grants of restricted share units (“RSUs”) and performance-based restricted share units (“PRSUs”), for both the Predecessor and Successor periods, are measured based on their estimated grant date fair value. The Company recognizes compensation expense on a straight-line basis over the requisite service period for awards expected to ultimately vest. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs materially from original estimates. Earnings Per Share Basic earnings per share is calculated by dividing the net loss attributable to Alight, Inc. by the weighted average number of shares of Class A Common Stock issued and outstanding for the Successor period. The computation of diluted earnings per share reflects the potential dilution that could occur if dilutive securities and other contracts to issue shares were exercised or converted into shares or resulted in the issuance of shares that would then share in the net income of the Alight, Inc. Warrants Warrant agreements related to warrants to purchase the Company’s Class A Common Stock were accounted for as liabilities at fair value within Financial instruments on the Consolidated Balance Sheets and were subject to remeasurement at each balance sheet date. Any change in fair value was recognized within the Consolidated Statements of Comprehensive Income (Loss). As of December 31, 2021, all warrants were exercised or redeemed. Tax Receivable Agreement In connection with the Business Combination, we entered into a Tax Receivable Agreement (the “TRA”) with certain of our pre-Business Seller Earnouts Upon completion of the Business Combination, we executed a contingent consideration agreement (the “Seller Earnouts”) that results in the issuance of non-voting Class B-1 Class B-2 consideration liability at fair value within Financial instruments on the Consolidated Balance Sheets and are subject to remeasurement at each balance sheet date. Any change in fair value is recognized within the Consolidated Statements of Comprehensive Income (Loss). Noncontrolling Interest Noncontrolling interest represents the Company’s noncontrolling interest in consolidated subsidiaries which are not attributable, directly or indirectly, to the controlling Class A Common Stock ownership of the Company. Net (loss) income is reduced by the portion of net (loss) income that is attributable to noncontrolling interests. These noncontrolling interests are convertible into Class A Common Stock of the Company at the holder’s discretion. Income Taxes During the Predecessor periods, a portion of the Company’s earnings were subject to certain U.S. federal, state and foreign taxes. During the Successor period, the portion of earnings allocable to the Company is subject to corporate level tax rates at the U.S. federal, state and local levels. Therefore, the amount of income taxes recorded in the Predecessor periods is not representative of the expenses expected in the future. The Company accounts for income taxes pursuant to the asset and liability method which requires it to recognize current tax liabilities or receivables for the amount of taxes it estimates are payable or refundable for the current year, deferred tax assets and liabilities for the expected future tax consequences attributable to temporary differences between the financial statement carrying amounts and their respective tax bases of assets and liabilities and the expected benefits of net operating loss and credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period enacted. A valuation allowance is provided when it is more likely than not that a portion or all of a deferred tax asset will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income and the reversal of deferred tax liabilities during the period in which related temporary differences become deductible. The Company recognizes the benefits of tax return positions in the financial statements if it is “more-likely-than-not” more-likely-than-not New Accounting Pronouncements: Recently Adopted Reference Rate Reform In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting de-designation held-to-maturity one-time available-for-sale held-to-maturity held-to-maturity 2021-01, held-to-maturity Callable Debt Securities In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20 debt security purchased at a premium is within the scope of ASC 310-20-35-33 Business Combination In October 2021, the FASB issued ASU 2021-08, “Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers” 2014-09,

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	3. Revenue from Contracts with Customers The majority of the Company’s revenue is highly recurring and is derived from contracts with customers to provide integrated, cloud-based human capital solutions that empower clients and their employees to manage their health, wealth and HR needs. The Company’s revenues are disaggregated by recurring and project revenues within each reportable segment. Recurring revenues are typically longer term in nature and more predictable on an annual basis, while project revenues consist of project work of a shorter duration. See Note 12 “Segment Reporting” for quantitative disclosures of recurring and project revenues by reportable segment. The Company’s reportable segments are Employer Solutions, Professional Services and Hosted Business. Employer Solutions are driven by our digital, software and AI-led Revenues are recognized when control of the promised services is transferred to the customer in the amount that best reflects the consideration to which the Company expects to be entitled in exchange for those services. The majority of the Company’s revenue is recognized over time as the customer simultaneously receives and consumes the benefits of our services. On occasion, we may be entitled to a fee based on achieving certain performance criteria or contract milestones. To the extent that we cannot estimate with reasonable assurance the likelihood that we will achieve the performance target, we will constrain this portion of the transaction price and recognize it when or as the uncertainty is resolved. Any taxes assessed on revenues relating to services provided to our clients are recorded on a net basis. All of the Company’s revenues are described in more detail below. Administrative Services We provide benefits, human resource and payroll administration services across all of our solutions, which are highly recurring. The Company’s contracts may include administration services across one or multiple solutions and typically have three These contracts typically consist of an implementation phase and an ongoing administration phase: Implementation phase set-up up-front Ongoing administration services phase on-boarding as-needed time increment (i.e., each month, or each benefit cycle in the case of our Health solutions arrangements) is distinct and substantially the same. Accordingly, the ongoing administration services for each solution represents a series and each series (i.e., each month, or each benefit cycle including the enrollment period in the case of our Health solutions arrangements) of distinct services are deemed to be a single performance obligation. In agreements that include multiple performance obligations, the transaction price related to each performance obligation is based on a relative stand-alone selling price basis. We establish the stand-alone selling price using observable market prices that the Company charges separately for similar solutions to similar customers. Our contracts with our clients specify the terms and conditions upon which the services are based. Fees for these services are primarily based on a contracted fee charged per participant per period (e.g., monthly or annually, as applicable). These contracts may also include fixed components, including lump-sum For Health solutions administration services, each benefits cycle inclusive of the enrollment period represents a time increment under the series guidance and is a single performance obligation. Although ongoing fees are typically not payable until the commencement of the ongoing administrative phase, we begin transferring services to our customers approximately four months prior to payments being due as part of our annual enrollment services. Although our per-participant For all other benefits administration, human resources and payroll services where each month represents a distinct time increment under the series guidance, we allocate the transaction price to the month we are performing our services. Therefore, the amount recognized each month is the variable consideration related to that month plus any fixed monthly or annual fee, which is recognized on a straight-line basis. Revenue for these types of arrangements are therefore more consistent throughout the year. In the normal course of business, we enter into change orders or other contract modifications to add or modify services provided to the customer. We evaluate whether these modifications should be accounted for as separate contracts or a modification to an existing contract. To the extent that the modification changes a promise that forms part of the underlying series, the modification is not accounted for as a separate contract. Other Contracts In addition to the ongoing administration services, the Company also has services across all solutions that represent separate performance obligations and that are often shorter in duration, such as our cloud deployment services, cloud advisory services, participant financial advisory services, and enrollment services not bundled with ongoing administration services. Fee arrangements can be in the form of fixed-fee, time-and-materials, Services may represent stand-ready obligations that meet the series provision, in which case all variable consideration is allocated to each distinct time increment. Other services are recognized over-time based on a method that faithfully depicts the transfer of value to the customer, which may be based on the value of labor hours worked or time elapsed, depending on the facts and circumstances. The majority of the fees for enrollment services not bundled with ongoing administration services may be in the form of commissions received from insurance carriers for policy placement and are variable in nature. These annual enrollment services include both employer-sponsored arrangements which place both retiree Medicare coverage and voluntary benefits and direct-to-consumer direct-to-consumer As it relates to the direct-to For both the employer-sponsored and direct-to-customer The Company has elected to apply practical expedients to not disclose the revenue related to unsatisfied performance obligations if (1) the contract has an original duration of one year or less, or (2) the variable consideration is allocated entirely to an unsatisfied performance obligation which is recognized as a series of distinct goods and services that form a single performance obligation. Contract Costs Costs to obtain a Contract The Company capitalizes incremental costs to obtain a contract with a customer that are expected to be recovered. Assets recognized for the costs to obtain a contract, which primarily includes sales commissions paid in relation to the initial contract, are amortized over the expected life of the underlying customer relationships, which is 7 years for our payroll and cloud solutions and 15 years for all of our other solutions. Commissions paid in relation to contract renewals were immaterial for all periods. The expected life of the underlying customer relationships considers the initial contract terms, which range from 3- 5 Costs to fulfill a Contract The Company capitalizes costs to fulfill contracts which includes highly customized implementation efforts to set up clients and their human resource, payroll or benefit programs. Assets recognized for the costs to fulfill a contract are amortized on a systematic basis over the expected life of the underlying customer relationships, which is 7 years for our payroll and cloud solutions and 15 years for all of our other solutions. Amortization for all contracts costs are recorded in Cost of services, exclusive of depreciation and amortization in the Consolidated Statements of Comprehensive Income (Loss) (see Note 5 “Other Financial Data”).

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Acquisitions	4. Acquisitions 2021 Acquisitions Alight Business Combination On July 2, 2021, the Company completed the Business Combination for consideration transferred of approximately $5.0 billion. The Business Combination was accounted for using the acquisition method under Accounting Standards Codification Topic 805, Business Combinations non-working On the Closing Date, the Company paid $36 million of deferred underwriting costs related to FTAC’s initial public offering and $37 million of fees related to the PIPE Investment, which were treated as a reduction of equity. Approximately $21 million of the Company’s acquisition-related costs were paid on the Closing Date. Additionally, $39 million of seller transaction costs were paid on the Closing Date, including $36 million in advisory and investment banker fees that were contingent upon the consummation of the Business Combination. As these fees are considered success fees in nature, they are considered to have been incurred “on the line”, and therefore, were not recognized in the Consolidated Statements of Comprehensive Income (Loss) in either the Predecessor or Successor periods. On the Closing Date, approximately $36 million of certain executive compensation related expenses that were contingent upon the closing of the Business Combination were triggered. As these expenses were contingent upon the change-in-control The following table summarizes the preliminary consideration transferred (in millions): Cash consideration to prior equityholders (1) $ 1,055 Repayment of debt 1,814 Total cash consideration $ 2,869 Continuing unitholders rollover equity into the Company (2) 1,414 Contingent consideration — Tax Receivable Agreement (3) 618 Contingent consideration — Seller Earnouts (3) 109 Total consideration transferred $ 5,010 Noncontrolling interest (4) $ 800 (1) Includes cash consideration paid to reimburse seller for certain transaction expenses. (2) The Company issued approximately 141 million shares that had a total fair value of approximately $1.4 billion based on the price of $10 per share on July 2, 2021, the acquisition date. (3) The TRA and Seller Earnouts represent liability classified contingent consideration. The estimated fair value of the TRA is preliminary and subject to adjustments in subsequent periods. Refer to Note 9 “Stockholders’ and Members’ Equity”, Note 14 “Financial Instruments” and Note 15 “Fair Value Measurement” for further discussion. (4) The fair value of the noncontrolling interest is estimated based on the fair value of acquired business, which was determined based on the price of the Company’s Class A Common Stock at the July 2, 2021 Closing Date, plus the contingent consideration related to the Seller Earnouts. The fair value of the noncontrolling interest is preliminary and subject to adjustments in subsequent periods. The noncontrolling interest is exchangeable for Class A Common Stock at the option of the holder. Refer to Note 9 “Stockholders’ and Members’ Equity” for additional information. The following table summarizes the preliminary purchase price allocation (in millions): Cash and cash equivalents $ 460 Receivables 486 Fiduciary assets 1,015 Other current assets 162 Fixed assets 205 Other assets 425 Accounts payable and accrued liabilities (327 ) Fiduciary liabilities (1,015 ) Other current liabilities (293 ) Debt assumed (2,370 ) Deferred tax liabilities (3 ) Other liabilities (396 ) Intangible assets 4,078 Total identifiable net assets $ 2,427 Goodwill $ 3,383 Measurement Period Adjustments During the fourth quarter of 2021, the Company recorded measurement period adjustments to its initial allocation of purchase price as a result of ongoing valuation procedures on assets acquired and liabilities assumed, including (i) an increase in Other current assets of $3 million, (ii) a decrease in Other assets of $15 million, (iii) a decrease in Other current liabilities of $9 million, and (iv) an increase to Other liabilities of $15 million due to the adjustment of certain lease liabilities and right-of-use Intangible Assets Intangible assets were identified that met either the separability criterion or the contractual-legal criterion described in ASC 805. The trade name intangible asset represents the corporate Alight tradename, which was valued using the relief-from-royalty method. The technology related intangible assets represent software developed by Alight Holdings to differentiate its product/service offerings for its customers, valued using the relief-from-royalty method. The customer-related and contract based intangible assets represent strong, long-term relationships with customers, valued using the multi-period excess earnings method. The preliminary values allocated to identifiable intangible assets and their estimated useful lives are as follows:​​​​​​​ Fair value Useful life Identifiable intangible assets (in millions) (in years) Definite lived trade names $ 400 15 Technology related intangibles $ 222 6 Customer-related and contract based intangibles $ 3,456 15 Goodwill Approximately $3.4 billion has been preliminarily allocated to goodwill. Goodwill represents the excess of the gross consideration transferred over the fair value of the underlying net tangible and identifiable definite-lived intangible assets acquired. Qualitative factors that contribute to the recognition of goodwill include certain intangible assets that are not recognized as separate identifiable intangible assets apart from goodwill, including assembled workforce and expected future market conditions. Of the preliminary goodwill established, $1.6 billion was tax deductible. Pro Forma Financial Information The following unaudited pro forma financial information presents the results of operations as if the Business Combination had occurred on January 1, 2020. The unaudited pro forma results may not necessarily reflect the actual results of operations that would have been achieved nor are they necessarily indicative of future results of operations. The unaudited pro forma financial information is as follows (in millions): Year Ended December 31, 2021 2020 Pro forma revenue $ 2,915 $ 2,728 Pro forma net loss $ (26 ) $ (158 ) Pro forma net loss attributable to controlling interest $ (17 ) $ (129 ) Pro forma net loss attributable to noncontrolling interest $ (9 ) $ (29 ) The unaudited pro forma financial information does not assume any impacts from revenue, cost or other operating synergies that could be generated as a result of the Business Combination. The unaudited pro forma financial information is for informational purposes only and is not indicative of the results of operations that would have been achieved had the Business Combination been consummated on January 1, 2020. The Successor and Predecessor periods have been combined in the pro forma financial information for the years ended December 31, 2021 and 2020 and include adjustments to reflect intangible asset amortization based on the economic values derived from definite-lived intangible assets and a reduction in interest expense related to the repayment of existing debt. Additionally, the unaudited pro forma financial information includes nonrecurring, direct transaction costs incurred in connection with the Business Combination of approximately $11 million for the Predecessor year ended December 31, 2020. These adjustments are net of taxes. Retiree Health Exchange On October 1, 2021, the Company completed the acquisition for consideration transferred of approximately $199 million. The acquisition was accounted for using the acquisition method under ASC 805, which requires, among other things, that most assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date. The preliminary consideration and allocation of the purchase price to the fair value of the combined assets acquired and liabilities assumed is presented below. The preliminary measurement of consideration transferred and the allocations reflect the best estimates of the valuations currently available and are subject to change once additional analyses are completed. The accounting for the acquisition is not complete as the valuation for acquired assets and liabilities have not been finalized and these final valuations of the assets and liabilities could have a material impact on the preliminary purchase price allocation disclosed below. The allocation will be finalized as soon as practicable, but no later than one year from the acquisition date. The following table summarizes the preliminary purchase price allocation (in millions): Receivables $ 1 Other current assets 29 Accounts payable and accrued liabilities (13 ) Intangible assets 104 Fair value of net assets acquired and liabilities assumed 121 Goodwill 78 Total consideration $ 199 Intangible assets include customer-related and contract based intangibles and technology with estimated useful lives of 13 years and 5 years, respectively. Acquisition-related costs incurred and recognized within Selling, general and administrative expenses during the Predecessor six months ended June 30, 2021 and Successor six months ended December 31, 2021 were $1 million and $3 million, respectively. Total revenue for this acquisition included in the Company’s Consolidated Statements of Comprehensive Income (Loss) for the Successor six months ended December 31, 2021 was approximately $123 million. Approximately $78 million has been preliminarily allocated to goodwill, all of which was tax deductible. Other Acquisitions The Company also completed one small acquisition during the year ended December 31, 2021. The acquisition was not material to the Company’s results of operations, financial position, or cash flows. The Company accounted for the acquisition as a business combination under ASC 805. The goodwill identified by this acquisition is primarily attributed to the synergies that are expected to be realized as well as intangible assets that do not qualify for separate recognition, such as assembled workforce. Goodwill is not amortized and is deductible for tax purposes. Upon completion of this acquisition, the business is now wholly-owned by the Company. 2020 Acquisition The Company completed one acquisition during the Predecessor year ended December 31, 2020. The acquisition was not material to the Company’s results of operations, financial position, or cash flows. The Company accounted for the acquisition as a business combination under ASC 805. The goodwill identified by this acquisition was primarily attributed to the synergies that were expected to be realized as well as intangible assets that did not qualify for separate recognition, such as assembled workforce. Goodwill is not amortized and is deductible for tax purposes. Upon completion of this acquisition, the business is now wholly-owned by the Company.

Other Financial Data

Other Financial Data	12 Months Ended
	Dec. 31, 2021
Other Financial Data [Abstract]
Other Financial Data	5. Other Financial Data Consolidated Balance Sheets Information Receivables, net The components of Receivables, net are as follows (in millions): Successor Predecessor December 31, December 31, Billed and unbilled receivables $ 520 $ 547 Allowance for expected credit losses (5 ) (15 ) Balance at end of period $ 515 $ 532 As a result of the Business Combination, all receivables acquired were recorded at fair value and allowance for expected credit losses previously recorded by the Predecessor was reduced to zero as of July 1, 2021 (see Note 4 “Acquisitions”). The Company has not experienced significant write-downs in its receivable balances. Other current assets The components of Other current assets are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred project costs $ 39 $ 53 Prepaid expenses 66 57 Commissions receivable 148 32 Other 49 21 Total $ 302 $ 163 Other assets The components of Other assets are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred project costs $ 274 $ 228 Operating lease right of use asset 120 129 Commissions receivable 34 25 Other 44 26 Total $ 472 $ 408 The current and non-current The current portion of the commissions receivable balance as of December 31, 2021 includes commission receivables related to the Retiree Health acquisition completed during the fourth quarter of 2021. Other current assets and Other assets include the fair value of outstanding derivative instruments related to interest rate swaps. The balance in Other current assets as of December 31, 2021 was $1 million. The balance in Other assets as of December 31, 2021 was $16 million (see Note 13 “Derivative Financial Instruments” for further information). See Note 18 “Lease Obligations” for further information regarding the Operating lease right of use assets recorded as of December 31, 2021 and 2020. Fixed assets, net The components of Fixed assets, net are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Capitalized software $ 55 $ 242 Leasehold improvements 40 63 Computer equipment 102 192 Furniture, fixtures and equipment 12 21 Construction in progress 58 28 Total Fixed assets, gross 267 546 Less: Accumulated depreciation 31 212 Fixed assets, net $ 236 $ 334 As a result of the Business Combination, all fixed assets acquired were recorded at fair value and accumulated depreciation previously recorded by the Predecessor was reduced to zero as of July 1, 2021 (see Note 4 “Acquisitions”). In addition, as part of the purchase price accounting for the Business Combination, Capitalized software related to internally developed software in-service Included in Computer equipment are assets under finance leases. The balances as of December 31, 2021 and 2020, net of accumulated depreciation related to these assets, were $62 million and $83 million, respectively. Other current liabilities The components of Other current liabilities are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred revenue $ 148 $ 148 Operating lease liabilities 44 41 Finance lease liabilities 27 28 Other 182 107 Total $ 401 $ 324 Other liabilities The components of Other liabilities are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred revenue $ 55 $ 60 Operating lease liabilities 139 155 Finance lease liabilities 34 59 Unrecognized tax positions 44 48 Other 81 125 Total $ 353 $ 447 The current and non-current Other current liabilities as of December 31, 2021 includes a deferred consideration payment of $83 million related to an acquisition completed in the fourth quarter of 2021. As of December 31, 2021 the current and non-current Other current liabilities and Other liabilities include the fair value of outstanding derivative instruments related to interest rate swaps. The balances in Other current liabilities as of December 31, 2021 and December 31, 2020 were $8 million and $28 million, respectively. The balances in Other liabilities as of December 31, 2021 and December 31, 2020 were $1 million and $19 million, respectively (see Note 13 “Derivative Financial Instruments” for further information).

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	6. Goodwill and Intangible assets, net The changes in the net carrying amount of goodwill are as follows (in millions): Predecessor Employer Solutions Professional Services Total Balance as of December 31, 2020 $ 1,985 $ 260 $ 2,245 Measurement period adjustments 2 — 2 Foreign currency translation 2 1 3 Balance as of June 30, 2021 $ 1,989 $ 261 $ 2,250 Successor Employer Solutions Professional Services Total Balance as of July 1, 2021 $ 3,309 $ 74 $ 3,383 Acquisitions 255 — 255 Balance as of December 31, 2021 $ 3,564 $ 74 $ 3,638 The Company did not identify any impairment for the Successor period from July 1, 2021 to December 31, 2021, or the Predecessor period December 31, 2020 to June 30, 2021. Goodwill is reviewed for impairment utilizing a qualitative assessment or a quantitative goodwill impairment test and the Company determined that it was more likely than not that no impairment of goodwill existed as of the evaluation date. Intangible assets by asset class are as follows (in millions): Successor Predecessor December 31, 2021 December 31, 2020 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets: Customer-related and contract based intangibles $ 3,662 $ 119 $ 3,543 $ 2,078 $ 486 $ 1,592 Technology related intangibles 254 20 234 316 180 136 Trade name (finite life) 407 14 393 8 6 2 Trade name (indefinite life) — — — 3 — 3 Total $ 4,323 $ 153 $ 4,170 $ 2,405 $ 672 $ 1,733 The net carrying amount of Intangible assets as of December 31, 2021 includes the preliminary fair values for customer-related and contract based identifiable intangible assets, technology related intangible assets and trade name assets based on management’s preliminary estimate of fair value (see Note 4 “Acquisitions” for further information). As a result of the Business Combination, all accumulated amortization previously recorded by the Predecessor was reduced to zero as of July 1, 2021. Amortization expense from finite-lived intangible assets for the Successor six months ended December 31, 2021 and the Predecessor six months ended June 30, 2021 and years ended December 31, 2020 and 2019 was $153 million, $100 million, $200 million and $185 million, respectively, which was recorded in Depreciation and intangible amortization in the Consolidated Statements of Comprehensive Income (Loss). The following table reflects intangible asset net carrying amount and weighted average remaining useful lives as of December 31, 2021 (in millions, except for years): Net Carrying Amount Weighted Average Remaining Useful Lives Intangible assets at December 31, 2021: Customer-related and contract based intangibles $ 3,543 14.5 Technology related intangibles 234 5.5 Trade name (finite life) 393 14.3 Total $ 4,170 Subsequent to December 31, 2021, the annual amortization expense is expected to be as follows (in millions): Customer-Related and Contract Based Intangibles Technology Related Intangibles Trade Name Intangible 2022 $ 245 $ 43 $ 28 2023 245 43 28 2024 245 43 28 2025 245 43 28 2026 245 42 27 Thereafter 2,318 20 254 Total amortization expense $ 3,543 $ 234 $ 393

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	7. Income Taxes Provision for Income Taxes (Loss) income before income tax expense (benefit) consists of the following (in millions): Successor Predecessor Six Months 2021 Six Months Ended 2021 Year Ended December 31, 2020 2019 (Loss) income before income tax expense (benefit) U.S. (loss) income $ (14 ) $ (28 ) $ (88 ) $ 26 Non-U.S. (9 ) (2 ) (6 ) 12 Total $ (23 ) $ (30 ) $ (94 ) $ 38 (Loss) income before income tax expense (benefit) shown above is based on the location of the business unit to which such earnings are attributable for tax purposes. In addition, because the earnings shown above may in some cases be subject to taxation in more than one country, the income tax provision shown below as federal, state, or foreign may not correspond to the geographic attribution of the earnings. The provision for income tax consists of the following (in millions): Successor Predecessor Six Months Ended December 31, Six Months Ended June 30, Year Ended December 31, 2021 2021 2020 2019 Income tax expense (benefit): Current: Federal $ 17 $ 1 $ — $ — State 3 — — 1 Foreign 6 (5 ) 9 13 Total current tax expense (benefit) $ 26 (4 ) $ 9 $ 14 Deferred tax expense: Federal $ — $ — $ (1 ) $ — State — — 1 — Foreign (1 ) (1 ) — 2 Total deferred tax (benefit) expense $ (1 ) $ (1 ) $ — $ 2 Total income tax expense (benefit) $ 25 $ (5 ) $ 9 $ 16 Effective Tax Rate Reconciliation The reconciliation of the effective tax rate for all periods presented is as follows (in millions): Successor Predecessor Six Months December 31, Six Months June 30, Year Ended December 31, 2021 2021 2020 2019 Amount % Amount % Amount % Amount % (Loss) income before income tax expense (benefit) $ (23 ) $ (30 ) $ (94 ) $ 38 Provision for income taxes at the statutory rate $ (5 ) 21 % $ — — $ — — $ — — State income taxes, net of federal benefit 3 (12 )% — — 1 — 1 3 % Jurisdictional rate differences (11 ) 49 % 1 (3 )% 9 (11 )% 15 41 % Changes in valuation allowances 23 (100 )% (2 ) 6 % — — — — Benefit of income not allocated to the Company 1 (4 )% — — — — — — Income in separate U.S. tax consolidations 16 (68 )% — — — — — — Non-deductible 8 (35 )% (2 ) 6 % — — — — Tax credits (4 ) 19 % — — — — — — Change in uncertain tax positions (5 ) 24 % — — — — — — Other (1 ) (3 )% (2 ) 7 % (1 ) 1 % — — Income tax expense (benefit) $ 25 (109 )% $ (5 ) 16 % $ 9 (10 )% $ 16 44 % The Company’s effective tax rate for the Successor six months ended December 31, 2021 was (109%), and for the Predecessor six months ended June 30, 2021 was 16%. The Company’s effective tax rate for the Predecessor years ended December 31, 2020 and 2019 was (10)% and 44%, respectively. The Company’s income tax expense varies from the expense that would be expected based on statutory rates due principally to its organizational structure. Prior to the Business Combination, Alight Holdings operated as a U.S. Partnership which generally is not subject to federal and state income taxes. Subsequent to the Business Combination, the Company’s effective tax rate differs from the U.S.’s statutory rate primarily due to foreign rate differences, valuation allowances, separate entity corporate taxes, and the noncontrolling interest associated with the portion of Alight Holdings income not allocable to the Company. The Company is taxed as a corporation and is subject to corporate federal, state, and local taxes on the income allocated to it from Alight Holdings, based upon the Company’s economic interest in Alight Holdings, and any stand-alone income or loss generated by the Company. Alight Holdings and certain subsidiaries combine to form a single entity taxable as a partnership for U.S. federal and most applicable state and local income tax purposes. As such, Alight Holdings is not subject to U.S. federal and certain state and local income taxes. The partners of Alight Holdings, including the Company, are liable for federal, state, and local income taxes based on their allocable share of Alight Holdings’ pass-through taxable income, which includes income of Alight Holdings’ subsidiaries that are treated as disregarded entities separate from Alight Holdings for income tax purposes. The effective tax rate for the Successor six months ended December 31, 2021 is lower than the 21% U.S. statutory corporate income tax rate primarily due to the structure after the Business Combination and the recognition of expenses which not deductible for income tax purposes. Deferred Income Taxes The components of the Company’s deferred tax assets and liabilities are as follows (in millions): Successor Predecessor December 31, 2021 December 31, 2020 Deferred tax assets: Employee benefit plans $ 2 $ 1 Interest 13 — Other credits 39 — Tax receivable agreement 64 — Other accrued expenses 10 4 Seller Earnouts 35 — Fixed assets 2 7 Intangible assets — 1 Net operating losses 313 154 Other 4 3 Total 482 170 Valuation allowance on deferred tax assets (226 ) (155 ) Total $ 256 $ 15 Deferred tax liabilities: Intangible assets $ (33 ) $ (3 ) Investment in partnership (246 ) — Other (10 ) (7 ) Total $ (289 ) $ (10 ) Net deferred tax (liability) asset $ (33 ) $ 5 As a result of the Business Combination, the Company established a deferred tax asset for the value of certain tax loss and credit carryforward attributes of the merged entities. In addition, the Company established a deferred tax liability to account for the difference between the Company’s book and tax basis in its investment in Alight Holdings. The Company also has historically maintained deferred tax assets on certain tax loss carryforwards in non-U.S. In assessing the realizability of deferred tax assets, the Company considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized and adjusts the valuation allowance accordingly. Considerations with respect to the realizability of deferred tax assets include the period of expiration, historical earnings, and future sources of taxable income by jurisdiction to which the tax asset relates. Significant management judgment is required in determining the assumptions and estimates related to the amount and timing of future taxable income. The Company maintains valuation allowances with regard to the tax benefits of certain net operating losses and other deferred tax assets, and periodically assesses the adequacy thereof. Valuation allowances increased by $71 million as of December 31, 2021, as compared to the Predecessor prior year. The change is primarily attributable acquired net operating losses and other deferred tax assets, as well as the effect of rate changes in foreign jurisdictions. As of December 31, 2021 and 2020, the Company had U.S. and foreign net operating losses (“NOLs”) of $313 million and $154 million, respectively. The material jurisdictions for the NOLs are the United States and United Kingdom and can be carried forward indefinitely. Uncertain Tax Positions The following is a reconciliation of the Company’s beginning and ending amount of uncertain tax positions (in millions): Balance at January 1, 2020 (Predecessor) $56 Reductions for tax positions of prior years (19) Lapse of statute of limitations (3 ) Balance at December 31, 2020 (Predecessor) $ 34 Additions for tax positions of prior years 1 Balance at June 30, 2021 (Predecessor) $ 35 Balance at July 1, 2021 (Successor) 35 Lapse of statute of limitations (5 ) Balance at December 31, 2021 (Successor) $ 30 The Company’s liability for uncertain tax positions as of December 31, 2021 and 2020 includes $27 million and $30 million, respectively, related to amounts that would impact the effective tax rate if recognized. The Company records interest and penalties related to uncertain tax positions in its provision for income taxes. The Company accrued potential interest and penalties of $17 million and $18 million as of December 31, 2021 and 2020, respectively. The Company and its subsidiaries file income tax returns in their respective jurisdictions. The Company has substantially concluded all U.S. federal income tax matters for years through 2014. The Company has concluded income tax examinations in its primary non-U.S.

Debt

Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt	8. Debt Debt outstanding consisted of the following (in millions): Predecessor Maturity Date December 31, 2020 Term Loan May 1, 2024 $ 634 Term Loan, Amended October 31, 2026 1,976 Secured Senior Notes June 1, 2025 300 Unsecured Senior Notes June 1, 2025 1,230 $24m Revolving Credit Facility May 1, 2022 — $226m Revolving Credit Facility, Amended October 31, 2024 — Other December 31, 2021 10 Total gross debt 4,150 Less: term loan and senior note financing fees and premium, net (72 ) Total debt, net 4,078 Less: current portion of long term debt, net (37 ) Total long term debt, net $ 4,041 Successor Maturity Date December 31, 2021 Term Loan May 1, 2024 $ 72 Term Loan, Amended October 31, 2026 1,958 Term Loan, Third Incremental (1) August 31, 2028 517 Secured Senior Notes June 1, 2025 314 $294m Revolving Credit Facility, Amended August 31, 2026 — Other June 30, 2022 7 Total debt, net 2,868 Less: current portion of long-term debt, net (38 ) Total long-term debt, net $ 2,830 (1) The net balance for the Third Incremental Term Loan includes unamortized debt issuance costs of $6 million. Purchase Accounting As part of purchase accounting for the Business Combination, the debt obligations assumed were recorded at fair value, under ASC 805, which resulted in an aggregate increase in the debt liability of $60 million. The fair value increase will be amortized over the respective terms of the debt obligations and recorded in Interest expense on the Consolidated Statements of Comprehensive Income (Loss) (See Note 4 “Acquisitions”). Term Loan In May 2017, the Company entered into a 7-year 50 Interest rates on the Term Loan borrowings are based on the London Interbank Offered Rate (“LIBOR”) subject to a 50 275 300 325 350 300 1-month During the first quarter of 2022, the Company refinanced the Amended and Third Incremental Term Loans to update the Benchmark reference rate to Term Secured Overnight Financing Rate (“SOFR”) from LIBOR and to have identical maturity dates of August 31, 2028 and borrowing margins as the Third Incremental Term Loans. Secured Senior Notes During May 2020, the Company issued $300 million of Secured Senior Notes. These Secured Senior Notes have a maturity date of June 1, 2025 and accrue interest at a fixed rate of 5.75% per annum, payable semi-annually on June 1 and December 1 of each year, beginning on December 1, 2020. Unsecured Senior Notes In May 2017, the Company issued $500 million of Initial Unsecured Senior Notes. During November 2017, July 2019, and August 2020, the Company issued additional Unsecured Senior Notes under identical terms as the Initial Unsecured Senior Notes for $180 million, $280 million, and $270 million, respectively (collectively “Unsecured Senior Notes”). The Unsecured Senior Notes had a maturity date of June 1, 2025 and accrue interest at a fixed rate of 6.750% per annum, payable semi-annually on June 1 and December 1 of each year. As part of the consideration transferred in the Business Combination, the Unsecured Senior Notes were fully redeemed. Revolving Credit Facility In May 2017, the Company entered into a 5-year As part of the acquisition of NGA HR during the Predecessor year ended December 31, 2019, the Company acquired a revolving credit facility of approximately $21 million secured on the accounts receivable balance of NGA HR. As of December 31, 2021, the outstanding borrowings under this facility were $7 million, which are reflected in Other in the table above. The facility matures on June 30, 2022, at which time any outstanding borrowings are repayable in full, with interest payable monthly. Interest is calculated based on an applicable reference rate plus a margin. Financing Fees, Premiums and Interest Expense The Company capitalized financing fees and premiums related to the Term Loan, Revolver and Secured Senior Notes issued. These financing fees and premiums were recorded as an offset to the aggregate debt balances and are being amortized over the respective loan terms. The unamortized financing fees and premiums related to the $556 million payment of the Term Loan in July 2021 and the redemption of the Unsecured Senior Notes in July 2021, were written down as part of the purchase accounting for the Business Combination. For the Successor six months ended December 30, 2021, a $2 million benefit was recorded, for the Predecessor six months ended June 30, 2021, and years ended December 31, 2020 and 2019, expenses of $8 million, $17 million and $17 million, respectively, were amortized and recorded in Interest expense in the Consolidated Statements of Comprehensive Income (Loss). As part of the purchase accounting for the Business Combination, the unamortized financing fees related to the Revolver were written off. In August 2021, $1 million of fees associated with the refinanced Revolver were capitalized. As the Revolver has no outstanding balance as of December 31, 2021, the related $1 million of financing fees are recorded in Other assets and are being amortized on a straight-line basis over the term of the Revolver. The straight-line amortization is immaterial each year. Amortization for all periods was recorded in Interest expense in the Consolidated Statements of Comprehensive Income (Loss). As of December 31, 2021, an immaterial amount and $1 million of unamortized financing fees related to the Revolver are recorded in Other current assets and Other assets, respectively, on the Consolidated Balance Sheets. As of December 31, 2020, $1 million and $1 million of unamortized financing fees related to the Revolver are recorded in Other current assets and Other assets, respectively, on the Consolidated Balance Sheets. Total interest expense related to the debt instruments for the Successor six months ended December 31, 2021 and Predecessor six months ended June 30, 2021 and years ended December 31, 2020 and 2019 was $53 million, $105 million, $204 million and $223 million, respectively, which included amortization of financing fees discussed above. Principal Payments Aggregate contractual principal payments as of December 31, 2021 are as follows (in millions): 2022 $ 38 2023 32 2024 84 2025 325 2026 1,882 Thereafter 497 Total payments $ 2,858

Stockholders' and Members' Equi

Stockholders' and Members' Equity	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Stockholders' and Members' Equity	9. Stockholders’ and Members’ Equity Predecessor Equity Class A Common Units There were no grants of Class A common units during the six months ended June 30, 2021 or the years ended December 31, 2020 and 2019. Each holder of Class A common units is entitled to one vote per unit. Class A-1 During the six months ended June 30, 2021, the Company granted 643 Restricted Class A-1 Class A-1 Class A-1 Class B Common Units During the six months ended June 30, 2021 there were no grants of Class B common units, and during the years ended December 31, 2020 and 2019, the Company granted 7,459 and 2,587 units, respectively. Holders of Class B common units are not entitled to voting rights. Successor Equity Preferred Stock Upon the Closing of the Business Combination, 1,000,000 preferred shares, par value $0.0001, were authorized. There are no preferred shares issued and outstanding as of December 31, 2021. Class A Common Stock As of December 31, 2021, 464,103,972 Class A common shares, including 7,821,091 of unvested Class A common shares, were legally issued and outstanding, par value $0.0001. Holders of Class A Common Shares are entitled to one vote per share, and together with the holders of shares of Class B Common Stock, will participate ratably in any dividends that may be declared by the Company’s Board of Directors. Class B Common Stock Upon the Closing of the Business Combination, the Seller Earnouts resulted in the issuance of a total of 14,999,998 Class B instruments (including 848,238 Unvested Class B common shares related to employee compensation) to the equityholders of the Predecessor. The equityholders of the Predecessor that exchanged their Predecessor Class A units for Alight Class A common shares in the Business Combination received Class B common shares, and the equityholders of the Predecessor that continue to hold Class A units of Alight Holdings (“Continuing Unitholders”) received Class B common units of Alight Holdings. The Class B Common Stock and Class B common units are not entitled to a vote and accrue dividends equal to amounts declared per corresponding Class A common share and Class A unit; however, such dividends are paid if and when such Class B share or Class B unit converts into a Class A share or Class A unit. If any of the Class B common shares or Class B common units do not vest on or before the seventh anniversary of the Closing Date, such shares or units will be automatically forfeited and cancelled for no consideration and will not be entitled to receive any cumulative dividend payments. These Class B instruments (excluding the Unvested B common shares related to employee compensation) are liability classified; refer to Note 14 “Financial Instruments” for additional information. As further described below, there are two series of Class B instruments outstanding. Class B-1 As of December 31, 2021, 4,990,453 Class B-1 Class B-1 Class B-1 1-for-1 30-trading To the extent any Unvested Class B-1 As of December 31, 2021, 2,509,546 Class B-1 Class B-1 1-for-1 30-trading Class B-2 As of December 31, 2021, 4,990,453 Class B-2 Class B-2 Class B-2 1-for-1 30-trading To the extent any Unvested Class B-2 As of December 31, 2021, 2,509,546 Class B-2 Class B-2 1-for-1 30-trading Class B-3 Upon the Closing of the Business Combination, 10,000,000 Class B-3 Class B-3 Class V Common Stock As of December 31, 2021, 77,459,687 Class V common shares were legally issued and outstanding, par value of $0.0001. Holders of Class V Common Stock are entitled to one vote per share and have no economic rights. The Class V Common Stock is held on a 1-for-1 Class Z Common Stock Upon the Closing of the Business Combination, a total of 8,671,507 Class Z instruments were issued to the equityholders of the Predecessor. The equityholders of the Predecessor that exchanged their Predecessor Class A units for Alight Class A common shares in the Business Combination received Class Z common shares, and the Continuing Unitholders received Class Z common units of Alight Holdings. The Class Z instruments were issued to the equityholders of the Predecessor to allow for the re-allocation Class B-1, Class B-2 As of December 31, 2021, 5,595,577 Class Z common shares (5,046,819 Class Z-A, Class Z-B-1, Class Z-B-2) Class Z-A, Class Z-B-1 Class Z-B-2 Class B-1 Class B-2 Class B-1, Class B-2 As of December 31, 2021, 3,075,930 Class Z common units (2,774,272 Class Z-A, Class Z-B-1, Class Z-B-2) Class Z-A, Class Z-B-1 Class Z-B-2 Class B-1 Class B-2 Class B-1, Class B-2 Class A Units Holders of Alight Holdings Class A units can exchange all or any portion of their Class A units, together with the cancellation of an equal number of shares of Alight Class V Common Stock, for a number of shares of Alight Class A Common Stock equal to the number of exchanged Class A units. Alight has the option to cash settle any future exchange. The Continuing Unitholders’ ownership of Class A units represents the noncontrolling interest of the Company, which is accounted for as permanent equity on the Consolidated Balance Sheets. As of December 31, 2021, there were 541,563,659 Class A Units outstanding, of which 464,103,972 are held by the Company and 77,459,687 are held by the noncontrolling interest of the Company. The Alight Holdings Operating Agreement contains provisions which require that a one-to-one The following table reflects the changes in our outstanding stock: Successor Class A Class B-1 Class B-2 Class V Class Z Balance at July 1, 2021 438,968,920 4,990,453 4,990,453 77,459,687 5,595,577 Warrant redemption 15,315,429 — — — — Issuance for compensation to non-employees (1) 26,398 — — — — Shares granted upon vesting 1,972,134 — — — — Balance at December 31, 2021 456,282,881 4,990,453 4,990,453 77,459,687 5,595,577 (1) Issued to certain members of the Board of Directors in lieu of cash retainer. Dividends There were no dividends declared during the Successor six months ended December 31, 2021. Accumulated Other Comprehensive Income As of December 31, 2021, the Accumulated other comprehensive income balance included unrealized losses for interest rate swaps and foreign currency translation adjustments related to our foreign subsidiaries that do not have the U.S. dollar as their functional currency. The tax effect for all periods presented was immaterial. Changes in accumulated other comprehensive income (loss), net of noncontrolling interests and tax, are as follows (in millions): Predecessor Foreign Interest (1) Total Balance at December 31, 2018 $ (9 ) $ 12 $ 3 Other comprehensive (loss) income before reclassifications, net of tax 6 (30 ) (24 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax — (4 ) (4 ) Net current period other comprehensive (loss) income 6 (34 ) (28 ) Balance at December 31, 2019 $ (3 ) $ (22 ) $ (25 ) Other comprehensive (loss) income before reclassifications, net of tax 8 (47 ) (39 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax — 22 22 Net current period other comprehensive (loss) income 8 (25 ) (17 ) Balance at December 31, 2020 $ 5 $ (47 ) $ (42 ) Other comprehensive (loss) income before reclassifications, net of tax 8 9 17 Amounts reclassified from accumulated other comprehensive income (loss), net of tax — 14 14 Net current period other comprehensive (loss) income 8 23 31 Balance at June 30, 2021 $ 13 $ (24 ) $ (11 ) Successor Foreign Interest (1) Total Balance at July 1, 2021 $ — $ — $ — Other comprehensive income (loss) before reclassifications — (9 ) (9 ) Tax benefit — 2 2 Other comprehensive income (loss) before reclassifications, net of tax — (7 ) (7 ) Amounts reclassified from accumulated other comprehensive loss — (1 ) (1 ) Tax expense — — — Amounts reclassified from accumulated other comprehensive loss, net of tax — (1 ) (1 ) Net current period other comprehensive income, net of tax — (8 ) (8 ) Balance at December 31, 2021 $ — $ (8 ) $ (8 ) (1) Reclassifications from this category are recorded in Interest expense. See Note 13 “Derivative Financial Instruments” for additional information.

Share-Based Compensation Expens

Share-Based Compensation Expense	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Compensation Expense	10. Share-Based Compensation Expense Predecessor Plans Prior to the Business Combination, share-based payments to employees include grants of restricted share units (“RSUs”) and performance based restricted share units (“PRSUs”), which consist of both Class A-1 Class A-1 Class A-1 The following tables summarizes the unit activity related to the RSUs and PRSUs during the Predecessor periods as follows: Predecessor RSUs Weighted PRSUs Weighted Balance as of December 31, 2018 3,525 $ 5,347 6,492 $ 2,952 Granted 862 4,578 1,725 4,572 Vested (1,123 ) 6,581 — — Forfeited (357 ) 4,037 (654 ) 2,626 Balance as of December 31, 2019 2,907 $ 4,785 7,563 $ 3,350 Granted 1,990 4,578 5,469 4,572 Vested (944 ) 5,374 — — Forfeited (954 ) 4,491 (3,809 ) 3,513 Balance as of December 31, 2020 2,999 $ 4,563 9,223 $ 4,015 Granted 254 28,875 389 24,420 Vested (517 ) 5,459 — — Forfeited (121 ) 4,527 (567 ) 2,626 Balance as of June 30, 2021 2,614 $ 6,741 9,045 $ 4,888 Successor Plans Predecessor Replacement Awards In connection with the Business Combination, the holders of certain unvested awards under the Predecessor plans were granted replacement awards in the Successor company. • Class B units: The unvested Class B units of Alight Holdings were granted replacement Unvested Class A common shares, Unvested Class B-1 Class B-2 • Class A-1 Class A-1 Class B-2 The Class B and Class A-1 Class B-1 Class B-2 re-allocation Successor Awards In connection with the Business Combination, the Company adopted the Alight, Inc. 2021 Omnibus Incentive Plan. Under this plan, for grants issued during the Successor six months ended December 31, 2021, approximately 50% of the units are subject to time-based vesting requirements and approximately 50% are subject to performance-based vesting requirements. The majority of the time-based RSUs vest ratably each December 31 over a three-year period with one-third The aggregate grant date fair value of RSUs and PRSUs granted during the Successor period six months ended December 31, 2021 was $119 million and $115 million, respectively. Restricted Share Units and Performance Based Restricted Share Units The following tables summarizes the unit activity related to the RSUs and PRSUs during the Successor six months ended December 31, 2021: Successor RSUs (1) Weighted PRSUs (1) Weighted Balance as of July 1, 2021 854,764 $ 9.91 7,816,743 $ 9.56 Granted 9,475,330 12.60 9,107,424 12.63 Vested (3,014,054 ) 12.62 — — Forfeited (167,624 ) 12.64 (181,054 ) 12.51 Balance as of December 31, 2021 7,148,416 $ 12.27 16,743,113 $ 11.20 (1) These share totals include both unvested shares and restricted stock units. Share-based Compensation The Company recorded share-based compensation costs related to the RSUs and PRSUs for the Successor six months ended December 31, 2021 and the Predecessor six months ended June 30, 2021 and years ended December 2020 and 2019 of $67 million, $5 million, $5 million and $9 million, respectively. As of December 31, 2021, total future compensation expense related to unvested RSUs was $84 million which will be recognized over a remaining weighted-average amortization period of approximately 1.6 years. As of December 31, 2021, total future compensation expense related to PRSUs was $156 million which will be recognized over approximately the next 2.2 years.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	11. Earnings Per Share Basic earnings per share is calculated by dividing the net loss attributable to Alight, Inc. by the weighted average number of shares of Class A Common Stock issued and outstanding for the Successor period. The computation of diluted earnings per share reflects the potential dilution that could occur if dilutive securities and other contracts to issue shares were exercised or converted into shares or resulted in the issuance of shares that then would then share in the net income of Alight, Inc. The Company’s Class V Common Stock and Class Z Common Stock do not participate in the earnings or losses of the Company and are therefore not participating securities and have not been included in either the basic or diluted earnings per share calculations. In conjunction with the Business Combination, the Company issued Seller Earnouts contingent consideration, which is payable in the Company’s Common Stock when the related market conditions are achieved. As the related conditions to pay the consideration had not been satisfied as of the end of the Successor period, the Seller Earnouts were excluded from the diluted earnings per share calculations. Basic and diluted earnings per share are as follows (in millions, except for share and per share amounts): Successor Six Months Ended 2021 Basic and diluted net loss per share: Numerator Net loss attributable to Alight, Inc. — basic and diluted $ (35 ) Denominator Weighted average shares outstanding — basic and diluted 439,800,624 Basic and diluted net loss per share $ (0.08 ) For the Successor six months ended December 31, 2021, 77,459,687 units related to noncontrolling interests and 7,007,072 unvested RSUs were not included in the computation of diluted shares outstanding as their impact would have been anti-dilutive. In addition, 14,999,998 shares related to the Seller Earnouts and 16,036,220 unvested PRSUs were excluded from the calculation of basic and diluted earnings per share as the market and performance conditions had not yet been met as of the end of the period.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Segment Reporting	12. Segment Reporting The Company’s reportable segments have been determined using a management approach, which is consistent with the basis and manner in which the Company’s chief operating decision maker (“CODM”) uses financial information for the purposes of allocating resources and evaluating performance. The Company’s CODM is its Chief Executive Officer. The CODM evaluates the performance of the Company based on its total revenue and segment profit. The CODM also uses revenue and segment profit to manage and evaluate our business, make planning decisions, and as performance measures for Company-wide bonus plans. These key financial measures provide an additional view of our operational performance over the long-term and provide useful information that we use in order to maintain and grow our business. The accounting policies of the segments are the same as those described in Note 2 “Accounting Policies and Practices.” The Company does not report assets by reportable segments as this information is not reviewed by the CODM on a regular basis. Information regarding the Company’s current reportable segments is as follows (in millions): Revenue Successor Predecessor Six Months Ended 2021 Six Months Ended 2021 Year Ended 2020 2019 Employer Solutions Recurring $ 1,213 $ 1,049 $ 2,051 $ 1,834 Project 134 107 237 250 Total Employer Solutions 1,347 1,156 2,288 2,084 Professional Services Recurring 65 60 108 56 Project 121 124 260 229 Total Professional Services 186 184 368 285 Hosted Business 21 21 72 183 Total $ 1,554 $ 1,361 $ 2,728 $ 2,552 Segment Profit Successor Predecessor Six Months Ended 2021 Six Months Ended 2021 Year Ended 2020 2019 Employer Solutions $ 344 $ 274 $ 533 $ 554 Professional Services 1 7 31 7 Hosted Business (2 ) (3 ) — 35 Total of all reportable segments 343 278 564 596 Share-based compensation 67 5 5 9 Transaction and integration expenses (1) 13 — — — Non-recurring (2) 19 18 — 14 Transformation initiatives (3) — — 8 22 Restructuring 5 9 77 14 Other (4) (10 ) (5 ) 36 19 Depreciation 31 49 91 68 Intangible amortization 153 100 200 185 Operating Income 65 102 147 265 Loss from change in fair value of financial instruments 65 — — — Gain from change in fair value of tax receivable agreement (37 ) — — — Interest expense 57 123 234 224 Other expense, net 3 9 7 3 (Loss) Income Before Income Tax Expense (Benefit) $ (23 ) $ (30 ) $ (94 ) $ 38 (1) Transaction and integration expenses related to acquisitions in 2021. (2) Non-recurring (3) Transformation initiatives in fiscal years 2020 and 2019 includes expenses related to enhancing our data center for both periods, and severance expense for the first half of 2019. (4) Other primarily includes activity related to long-term incentives and expenses related to acquisitions in fiscal years 2020 and 2019, offset by Other expense, net. There was no single client who accounted for more than 10% of the Company’s revenues in any of the periods presented. Revenue by geographic location is as follows (in millions): Successor Predecessor Six Months Ended Six Months Ended Year Ended 2021 2021 2020 2019 United States $ 1,358 $ 1,168 $ 2,353 $ 2,361 Rest of world 196 193 375 191 Total $ 1,554 $ 1,361 $ 2,728 $ 2,552 Long-lived assets, representing Fixed assets, net and Operating lease right of use assets, by geographic location is as follows (in millions): Successor Predecessor December 31, 2021 December 31, United States $ 305 $ 415 Rest of world 51 48 Total $ 356 $ 463

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	13. Derivative Financial Instruments The Company is exposed to market risks, including changes in interest rates. To manage the risk related to these exposures, the Company has entered into various derivative instruments that reduce these risks by creating offsetting exposures. Interest Rate Swaps The Company has utilized swap agreements that will fix the floating interest rates associated with its Term Loan as shown in the following table: Designation Date Effective Date Initial Notional Amount Notional Amount Fixed Rate Expiration Date July 2021 August 2020 557,500,000 557,500,000 2.5070 % May 2022 July 2021 August 2020 89,863,420 99,722,020 3.0854 % February 2023 December 2021 August 2020 181,205,050 165,545,350 0.7775 % April 2024 December 2021 August 2020 388,877,200 370,980,400 0.7430 % April 2024 December 2021 May 2022 220,130,318 n/a 0.5170 % April 2024 December 2021 May 2022 306,004,562 n/a 0.5127 % April 2024 December 2021 April 2024 871,205,040 n/a 1.7258 % June 2025 December 2021 April 2024 435,602,520 n/a 1.7290 % June 2025 December 2021 April 2024 435,602,520 n/a 1.7450 % June 2025 Concurrent with execution of the Business Combination and the $556 million pay down of the Term Loan, three hedges were terminated, and two previously unfloored hedges were amended to incorporate an interest rate floor of 50 Our swap agreements amortize or accrete based on achieving targeted hedge ratios. All interest rate swaps have been designated as cash flow hedges. As a result of the amendment, the fair value of the instruments at the time of re-designation During the first quarter of 2022, the Company amended its interest rate swaps index in conjunction with term loan refinancing to incorporate Term SOFR. Financial Instrument Presentation The fair values and location of outstanding derivative instruments recorded in the Consolidated Balance Sheets are as follows (in millions):​​​​​​​ Successor Predecessor December 31, 2021 December 31, 2020 Assets Other current assets $ 1 $ — Other assets $ 16 $ — Total $ 17 $ — Liabilities Other current liabilities $ 8 $ 28 Other liabilities 1 19 Total $ 9 $ 47 The Company estimates that approximately $2 million of derivative losses included in Accumulated other comprehensive income as of December 31, 2021 will be reclassified into earnings over the next twelve months.

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2021
Financial Instruments [Abstract]
Financial Instruments	14. Financial Instruments Seller Earnouts Upon completion of the Business Combination, the equity owners of Alight Holdings received an earnout in the form of non-voting Class B-1 Class B-2 The portion of the Seller Earnouts related to employee compensation is accounted for as share-based compensation. See Note 10 “Share-Based Compensation Expense” for additional information. The majority of the Seller Earnouts, which are not related to employee compensation, are accounted for as a contingent consideration liability at fair value within Financial instruments on the Consolidated Balance Sheets because the Seller Earnouts do not meet the criteria for classification within equity. This portion of the Seller Earnouts are subject to remeasurement at each balance sheet date and as of December 31, 2021, the Seller Earnouts had a fair value of $135 million. For the Successor six months ended December 31, 2021, a loss of $26 million was recorded in Loss from change in fair value of financial instruments in the Consolidated Statements of Comprehensive Income (Loss). Warrants Upon the completion of the Business Combination, there were issued and outstanding Company warrants to purchase shares of Class A Common Stock at a price of $11.50 per share, subject to adjustment for stock splits and/or extraordinary dividends, as described in the warrant agreement, including 10,000,000 warrants that were issued as a result of the consummation of the Forward Purchase Agreements (“Forward Purchase Warrants”). Private Warrants were exchanged for an equivalent number of Class C Units representing limited liability company interests of Alight Holdings and had the same terms as the Private Warrants. Each of the Public Warrants, Forward Purchase Warrants and Class C Units (collectively the “Warrants”) were exercisable for one share of Alight, Inc. Class A Common Stock. The Warrants had an expiration date of July 2, 2026, (five years after the completion of the Business Combination) and were exercisable beginning after certain lock-up The Company accounted for Warrants as liabilities at fair value within Financial instruments on the Consolidated Balance Sheets because the Warrants do not meet the criteria for classification within equity. The Warrants were subject to remeasurement at each balance sheet date. In December 2021, the majority of the Warrants were exercised under cashless (net) exercise provisions resulting in the issuance of 15,315,429 shares of Class A common shares. Additionally, the Company redeemed 742,918 Warrants for $0.10 per warrant. Just prior to the exercise and redemption of the Warrants, the Company remeasured the warrant liability to its fair value. Upon exercise of the Warrants, the respective carrying value of the warrant liability was reclassified into additional paid in capital. As of December 31, 2021, no Warrants were outstanding. For the Successor six months ended December 31, 2021, a loss of $39 million was recorded in Loss from change in fair value of financial instruments in the Consolidated Statements of Comprehensive Income (Loss) due to the remeasurement of the warrant liability prior to the exercise and redemption of the Warrants.

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement	15. Fair Value Measurement Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The accounting standards related to fair value measurements include a hierarchy for information and valuations used in measuring fair value that is broken down into three levels based on reliability, as follows: • Level 1 — observable inputs such as quoted prices in active markets for identical assets and liabilities; • Level 2 — inputs other than quoted prices for identical assets in active markets that are observable either directly or indirectly; and • Level 3 — unobservable inputs in which there is little or no market data which requires the use of valuation techniques and the development of assumptions. The Company’s financial assets and liabilities measured at fair value on a recurring basis are as follows (in millions): Successor December 31, 2021 Level 1 Level 2 Level 3 Total Assets Interest rate swaps $ — $ 17 $ — $ 17 Total assets recorded at fair value $ — $ 17 $ — $ 17 Liabilities Interest rate swaps $ — $ 9 $ — $ 9 Contingent consideration liability — — 33 33 Seller Earnouts liability — — 135 135 Tax receivable agreement liability — — 581 581 Total liabilities recorded at fair value $ — $ 9 $ 749 $ 758 Predecessor December 31, 2020 Level 1 Level 2 Level 3 Total Liabilities Interest rate swaps $ — $ 47 $ — $ 47 Contingent consideration liability — — 26 26 Total liabilities recorded at fair value $ — $ 47 $ 26 $ 73 Derivatives The valuations of the derivatives intended to mitigate our interest rate risk are determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each instrument. This analysis utilizes observable market-based inputs, including interest rate curves, interest rate volatility, or spot and forward exchange rates, and reflects the contractual terms of these instruments, including the period to maturity. In addition, credit valuation adjustments, which consider the impact of any credit enhancements to the contracts, are incorporated in the fair values to account for potential non-performance Contingent Consideration The contingent consideration liabilities relate to acquisitions completed during the Successor six months ended December 31, 2021, the Predecessor years ended December 31, 2020 and 2018, and are included in Other current liabilities and Other liabilities on the Consolidated Balance Sheets. The fair value of these liabilities is determined using a discounted cash flow analysis. Changes in the fair value of the liabilities are included in Other expense, net in the Consolidated Statements of Comprehensive Income (Loss). Significant unobservable inputs are used in the assessment of fair value, including assumptions regarding discount rates and probability assessments based on the likelihood of reaching the various targets set out in the acquisition agreements. The following table summarizes the changes in deferred contingent consideration liabilities (in millions): Successor Predecessor Six Months Ended Six Months Ended 2021 Year Ended Beginning balance $ 29 $ 26 $ 22 Acquisitions 8 2 3 Accretion of contingent consideration — 1 — Remeasurement of acquisition-related contingent consideration (2 ) — 8 Payments (2 ) — (7 ) Ending Balance $ 33 $ 29 $ 26 Seller Earnouts The Company accounts for the Seller Earnouts as contingent consideration liabilities at fair value in Financial Instruments in the Consolidated Balance Sheets. The fair value of the Seller Earnouts is determined using Monte Carlo simulation and Option Pricing Methods. Changes in the fair value of the liability is included in Loss from change in fair value of financial instruments in the Consolidated Statements of Comprehensive Income (Loss). Significant unobservable inputs are used in the assessment of fair value, including the following assumptions: volatility of 45%, risk-free interest rate of 1.40%, expected holding period of 6.51 years and probability assessments based on the likelihood of reaching the performance targets defined in the Business Combination. An increase in the risk-free interest rate or expected volatility would result in an increase in the fair value measurement of the Seller Earnouts and vice versa. Tax Receivable Agreement In connection with the Business Combination, Alight entered into the Tax Receivable Agreement (the “TRA”) with certain owners of Alight Holdings prior to the Business Combination. Pursuant to the TRA, the Company will pay certain sellers, as applicable, 85 Actual tax benefits realized by Alight may differ from tax benefits calculated under the TRA as a result of the use of certain assumptions in the TRA, including the use of an assumed weighted-average state and local income tax rate to calculate tax benefits. While the amount of existing tax basis, the anticipated tax basis adjustments and the actual amount and utilization of tax attributes, as well as the amount and timing of any payments under the TRA, will vary depending upon a number of factors, we expect that the payments that Alight may make under the TRA will be substantial. The Company’s TRA liability is measured at fair value on a recurring basis using significant unobservable inputs (Level 3). The $581 million TRA liability balance at December 31, 2021 assumes: (i) a constant blended U.S. federal, state and local income tax rate of 26.04%; (ii) no material changes in tax law; (iii) the ability to utilize tax attributes based on current alternative tax forecasts; and (iv) future payments under the TRA are made when due under the TRA. The amount of the expected future payments under the TRA has been discounted to its present value using a discount rate of 6.9%. The opening balance sheet fair value of the TRA at July 1, 2021 is preliminary and the final fair value could have a material impact on the preliminary purchase price allocation disclosed. The fair value will be finalized as soon as practicable, but no later than one year from the acquisition date. The following table provides a reconciliation of the TRA liability and Seller Earnout liability for the Successor six months ended December 31, 2021: Successor TRA Seller Earnouts Balance at July 1, 2021 $ 618 $ 109 Gain from change in fair value of TRA (37 ) — Loss from change in fair value of Seller Earnouts — 26 Balance at December 31, 2021 $ 581 $ 135 Non-Recurring The Company’s financial liabilities not measured at fair value on a recurring basis are as follows (in millions): Successor Predecessor December 31, 2021 December 31, 2020 Carrying Value Fair Value Carrying Value Fair Value Liabilities Current portion of long-term debt, net $ 38 $ 38 $ 37 $ 37 Long-term debt, net 2,830 2,834 4,041 4,090 Total $ 2,868 $ 2,872 $ 4,078 $ 4,127 The carrying value of the Term Loan, Secured Senior Notes and Unsecured Senior Notes include the outstanding principal balances, less any unamortized discount or premium. The carrying value of the Term Loan approximates fair value as it bears interest at variable rates and we believe our credit risk is consistent with when the debt originated. The outstanding balances under the Senior Notes have fixed interest rates and the fair value is classified as Level 2 within the fair value hierarchy and corroborated by observable market data (see Note 8 “Debt”). The carrying amounts of Cash and cash equivalents, Receivables, net and Accounts payable and accrued liabilities approximate their fair values due to the short-term maturities of these instruments. During the Successor six months ended December 31, 2021 and the Predecessor six months ended June 30, 2021 and years ended December 31, 2020 and 2019 there were no transfers in or out of the Level 1, Level 2 or Level 3 classifications.

Restructuring and Integration

Restructuring and Integration	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Restructuring and Integration	16. Restructuring and Integration During the third quarter of 2019, management initiated a restructuring and integration plan (“the Plan”) following the completion of the Hodges acquisition and in anticipation of the NGA HR acquisition, which was completed on November 1, 2019. The Plan is intended to integrate and streamline operations across the Company and is expected to generate cost reductions related to position eliminations and facility and system rationalizations. The Company expects to incur costs related to severance, contract and lease exits and other related costs. The Company expects these restructuring and integration activities and related expenses to affect continuing operations through the fourth quarter of 2022. The Plan is expected to result in cumulative costs of approximately $140 million through the end of the plan, consisting of approximately $69 million in severance and related benefits, and approximately $71 million in other costs, including technology realization, lease consolidation costs, advisory and consulting fees. The Plan is expected to generate annual cost savings of approximately $196 million by 2022. From the inception of the Plan through December 31, 2021, the Company has incurred total expenses of $105 million. These charges are recorded in Cost of services, exclusive of depreciation and amortization and Selling, general and administrative expenses in the Consolidated Statements of Comprehensive Income (Loss). The following table summarizes restructuring costs by type that have been incurred through December 31, 2021 and are estimated to be incurred through the end of the Plan. Estimated costs by type may be revised in future periods as these assumptions are updated: Successor Predecessor Six Months Ended 2021 Six Months Ended 2021 Inception Estimated Estimated (1) Employer Solutions Severance and Related Benefits $ 1 $ 6 $ 46 $ 13 $ 59 Other Restructuring Costs (2) 3 2 45 17 62 Total Employer Solutions $ 4 $ 8 $ 91 $ 30 $ 121 Professional Services Severance and Related Benefits $ — $ 1 $ 8 $ 2 $ 10 Other Restructuring Costs (2) 1 — 6 3 9 Total Professional Services $ 1 $ 1 $ 14 $ 5 $ 19 Total Restructuring Costs $ 5 $ 9 $ 105 $ 35 $ 140 (1) Actual costs, when incurred, may vary due to changes in the assumptions built into the Plan. Significant assumptions that may change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives. (2) Other costs associated with the Plan primarily include consulting and legal fees and lease consolidation. As of December 31, 2021, approximately $4 million of the restructuring liability is unpaid and is recorded in Accounts payable and accrued liabilities on the Consolidated Balance Sheets. Predecessor Severance and Other Restructuring Total Accrued restructuring liability as of December 31, 2020 $ 12 $ 3 $ 15 Restructuring charges 7 2 9 Cash payments (13 ) (5 ) (18 ) Accrued restructuring liability as of June 30, 2021 $ 6 $ — $ 6 Successor Severance and Other Restructuring Total Accrued restructuring liability as of July 1, 2021 $ 6 $ — $ 6 Restructuring charges 1 4 5 Cash payments (3 ) (4 ) (7 ) Accrued restructuring liability as of December 31, 2021 $ 4 $ — $ 4

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Employee Benefits	17. Employee Benefits Defined Contribution Savings Plans Certain of the Company’s employees participate in a defined contribution savings plan sponsored by the Company. For the Successor six months ended December 31, 2021 and the Predecessor six months ended June 30, 2021 and years ended December 31, 2020 and 2019, expenses were $24 million, $31 million, $46 million and $49 million, respectively. Expenses were recognized in Cost of services, exclusive of depreciation and amortization and Selling, general and administrative expenses in the Consolidated Statements of Comprehensive Income (Loss).

Lease Obligations

Lease Obligations	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Lease Obligations	18. Lease Obligations The Company determines if an arrangement is a lease at inception. Operating leases are included in Other assets, Other current liabilities and Other liabilities in the Consolidated Balance Sheets. Right-of-use right-of-use The Company’s most significant leases are office facilities. For these leases, the Company has elected the practical expedient permitted under ASU 2016-02, non-lease non-lease Certain of the Company’s operating lease agreements include variable payments that are passed through by the landlord, such as insurance, taxes, common area maintenance, payments based on the usage of the asset, and rental payments adjusted periodically for inflation. These variable payments are not included in the lease liabilities reflected on the Company’s Consolidated Balance Sheets. The Company does sublease portions of our buildings to third parties. The right of use liability associated with these leases are not offset with expected rental incomes, as we remain primarily obligated for the leases. The Company’s lease agreements do not contain material residual value guarantees, restrictions, or covenants. The components of lease expense were as follows (in millions): Successor Predecessor Six Months Six Months Year Ended 2021 2021 2020 2019 Operating lease cost $ 14 $ 16 $ 40 $ 27 Finance lease cost: Amortization of leased assets 12 13 21 15 Interest of lease liabilities 2 2 4 4 Variable and short-term lease cost 3 3 6 8 Sublease income (3 ) (4 ) (6 ) (8 ) Total lease cost $ 28 $ 30 $ 65 $ 46 Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): Successor Predecessor December 31, December 31, Operating Leases Operating lease right-of-use asse $ 120 $ 129 Current operating lease liabilities 44 41 Noncurrent operating lease liabilities 139 155 Total operating lease liabilities $ 183 $ 196 Finance Leases Fixed assets, net $ 62 $ 83 Current finance lease liabilities 27 28 Noncurrent finance lease liabilities 34 59 Total finance lease liabilities $ 61 $ 87 Weighted Average Remaining Lease Term (in years) Operating leases 5.8 6.6 Finance leases 2.7 3.5 Weighted Average Discount Rate Operating leases 4.3 % 5.6 % Finance leases 4.4 % 4.4 % Supplemental cash flow and other information related to leases was as follows (in millions): Successor Predecessor Six Months Six Months Ended Year Ended 2021 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 27 $ 22 $ 42 $ 36 Operating cash flows from finance leases 2 2 4 4 Financing cash flows from finance leases 14 17 24 13 Right-of Operating leases $ 2 $ 10 $ 26 $ 58 Finance leases 2 2 62 24 Future lease payments for lease obligations with initial terms in excess of one year as of December 31, 2021 are as follows (in millions): Finance Operating 2022 $ 23 $ 38 2023 22 34 2024 16 33 2025 4 22 2026 — 17 Thereafter — 46 Total lease payments 65 190 Less: amount representing interest (4 ) (27 ) Total lease obligations, net 61 163 Less: current portion of lease obligations, net (27 ) (37 ) Total long-term portion of lease obligations, net $ 34 $ 126 The operating lease future lease payments include sublease rental income of $7 million, $6 million, $5 million and $2 million for 2022, 2023, 2024 and 2025, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	19. Commitments and Contingencies Legal The Company is subject to various claims, tax assessments, lawsuits, and proceedings that arise in the ordinary course of business relating to the delivery of our services and the effectiveness of our technologies. The damages claimed in these matters are or may be substantial. Accruals for any exposures, and related insurance or other receivables, when applicable, are included on the Consolidated Balance Sheets and have been recognized in Selling, general and administrative expenses in the Consolidated Statements of Comprehensive Income (Loss) to the extent that losses are deemed probable and are reasonably estimable. These amounts are adjusted from time to time as developments warrant. Management believes that the reserves established are appropriate based on the facts currently known. The reserves recorded at December 31, 2021 and December 31, 2020 were not significant. Guarantees and Indemnifications The Company provides a variety of service performance guarantees and indemnifications to its clients. The maximum potential amount of future payments represents the notional amounts that could become payable under the guarantees and indemnifications if there were a total default by the guaranteed parties, without consideration of possible recoveries under recourse provisions or other methods. These notional amounts may bear no relationship to the future payments that may be made, if any, for these guarantees and indemnifications. To date, the Company has not been required to make any payment under any client arrangement as described above. The Company has assessed the current status of performance risk related to the client arrangements with performance guarantees and believes that any potential payments would be immaterial to the Consolidated Financial Statements. Purchase Obligations The Company’s expected cash outflow for non-cancellable Service Obligations On September 1, 2018, the Company executed an agreement to form a strategic partnership with Wipro, a leading global information technology, consulting and business process services company. The Company’s expected cash outflow for non-cancellable The Company may terminate its arrangement with Wipro for cause or for the Company’s convenience. In the case of a termination for convenience, the Company would be required to pay a termination fee, including certain of Wipro’s unamortized costs, plus 25% of any remaining portion of the minimum level of services the Company agreed to purchase from Wipro over the course of 10 years.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	20. Subsequent Events In January 2022, the Company refinanced the Amended and Third Incremental Term Loans to update the Benchmark reference rate to Term SOFR from LIBOR and to have identical maturity dates of August 31, 2028 and borrowing margins as the Third Incremental Term Loans (see Note 8 “Debt”). The Company also amended its interest rate swaps index in conjunction with the term loan refinancing to incorporate Term SOFR (see Note 13 “Derivative Financial Instruments”). Events and transactions occurring through the date of issuance of these financial statements have been evaluated by management and, when appropriate, recognized or disclosed in the financial statements or the notes to the Consolidated Financial Statements.

Accounting Policies and Pract_2

Accounting Policies and Practices (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation As a result of the Business Combination, for accounting purposes, the Company is the acquirer and Alight Holdings is the acquiree and accounting predecessor. While the Closing Date was July 2, 2021, we have determined that as the impact of one day would be immaterial to the results of operations, we will utilize July 1, 2021 as the date of the Business Combination for accounting purposes. Therefore, the financial statement presentation includes the financial statements of Alight Holdings as Predecessor for the periods prior to July 1, 2021 and the Company as Successor for the periods including and after July 1, 2021, including the consolidation of Alight Holdings.
Use of Estimates	Use of Estimates The preparation of the accompanying Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of reserves and expenses. These estimates and assumptions are based on management’s best estimates and judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management believes its estimates to be reasonable given the current facts available. Management adjusts such estimates and assumptions when facts and circumstances dictate. Illiquid credit markets, volatile equity markets, and foreign currency exchange rate movements increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be predicted with certainty, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment would, if applicable, be reflected in the financial statements in future periods.
Concentration of Risk	Concentration of Risk The Company has no significant off-balance
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash balances. At December 31, 2021 and December 31, 2020, Cash and cash equivalents totaled $372 million and $506 million, respectively, and none of the balances were restricted as to its use.
Fiduciary Assets and Liabilities	Fiduciary Assets and Liabilities Some of the Company’s agreements require it to hold funds to pay certain obligations on behalf of its clients. Funds held on behalf of clients are segregated from Company funds, and their use is restricted to the payment of obligations on behalf of clients. There is typically a short period of time between when the Company receives funds and when it pays obligations on behalf of clients. These funds are recorded as Fiduciary assets with the related obligation recorded as Fiduciary liabilities in the Consolidated Balance Sheets.
Commissions Receivable	Commissions Receivable Commissions receivable, which is recorded in Other current assets and Other assets in the Consolidated Balance Sheets, are contract assets that represent estimated variable consideration for commissions to be received from insurance carriers for performance obligations that have been satisfied. The current portion of Commissions receivable is expected to be received within one year, while the non-current
Allowance for Expected Credit Losses	Allowance for Expected Credit Losses The Company’s allowance for expected credit losses with respect to trade receivables and contract assets is based on a combination of factors, including evaluation of historical write-offs, current conditions and reasonable economic forecasts that affect collectability and other qualitative and quantitative analysis. Receivables, net included an allowance for expected credit losses of $5 million and $15 million at December 31, 2021 and December 31, 2020, respectively.
Fixed Assets, Net	Fixed Assets, Net The Company records fixed assets at cost. We compute depreciation and amortization using the straight-line method on the estimated useful lives of the assets, which are generally as follows: Asset Description Asset Life Capitalized software Lesser of the life of an associated license, or 4 to 7 years Leasehold improvements Lesser of estimated useful life or lease term, not to exceed 10 years Furniture, fixtures and equipment 4 to 10 years Computer equipment 4 to 6 years
Goodwill and Intangible Assets, Net	Goodwill and Intangible Assets, Net In applying the acquisition method of accounting for business combinations, amounts assigned to identifiable assets and liabilities acquired were based on estimated fair values as of the date of acquisition, with the remainder recorded as goodwill. Intangible assets are initially valued at fair value using generally accepted valuation methods appropriate for the type of intangible asset. Intangible assets with definite lives are amortized over their estimated useful lives and are reviewed for impairment if indicators of impairment arise. Goodwill is tested for impairment annually as of October 1, and whenever indicators of impairment arise.
Derivatives	Derivatives The Company uses derivative financial instruments, such as interest rate swaps. Interest rate swaps are used to manage interest risk exposures and have been designated as cash flow hedges. The changes in the fair value of derivatives that qualify for hedge accounting as cash flow hedges are recorded in Accumulated other comprehensive income (loss). Amounts are reclassified from Accumulated other comprehensive income (loss) into earnings when the hedge exposure affects earnings. The Company discontinues hedge accounting prospectively when: (1) the derivative expires or is sold, terminated, or exercised; (2) the qualifying criteria are no longer met; or (3) management removes the designation of the hedging relationship.
Foreign Currency	Foreign Currency Certain of the Company’s non-U.S. non-functional
Share-Based Compensation Costs	Share-Based Compensation Costs Share-based payments, including grants of restricted share units (“RSUs”) and performance-based restricted share units (“PRSUs”), for both the Predecessor and Successor periods, are measured based on their estimated grant date fair value. The Company recognizes compensation expense on a straight-line basis over the requisite service period for awards expected to ultimately vest. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs materially from original estimates.
Earnings Per Share	Earnings Per Share Basic earnings per share is calculated by dividing the net loss attributable to Alight, Inc. by the weighted average number of shares of Class A Common Stock issued and outstanding for the Successor period. The computation of diluted earnings per share reflects the potential dilution that could occur if dilutive securities and other contracts to issue shares were exercised or converted into shares or resulted in the issuance of shares that would then share in the net income of the Alight, Inc.
Warrants	Warrants Warrant agreements related to warrants to purchase the Company’s Class A Common Stock were accounted for as liabilities at fair value within Financial instruments on the Consolidated Balance Sheets and were subject to remeasurement at each balance sheet date. Any change in fair value was recognized within the Consolidated Statements of Comprehensive Income (Loss). As of December 31, 2021, all warrants were exercised or redeemed.
Tax Receivable Agreement	Tax Receivable Agreement In connection with the Business Combination, we entered into a Tax Receivable Agreement (the “TRA”) with certain of our pre-Business
Seller Earnouts	Seller Earnouts Upon completion of the Business Combination, we executed a contingent consideration agreement (the “Seller Earnouts”) that results in the issuance of non-voting Class B-1 Class B-2 consideration liability at fair value within Financial instruments on the Consolidated Balance Sheets and are subject to remeasurement at each balance sheet date. Any change in fair value is recognized within the Consolidated Statements of Comprehensive Income (Loss).
Noncontrolling Interest	Noncontrolling Interest Noncontrolling interest represents the Company’s noncontrolling interest in consolidated subsidiaries which are not attributable, directly or indirectly, to the controlling Class A Common Stock ownership of the Company. Net (loss) income is reduced by the portion of net (loss) income that is attributable to noncontrolling interests. These noncontrolling interests are convertible into Class A Common Stock of the Company at the holder’s discretion.
Income Taxes	Income Taxes During the Predecessor periods, a portion of the Company’s earnings were subject to certain U.S. federal, state and foreign taxes. During the Successor period, the portion of earnings allocable to the Company is subject to corporate level tax rates at the U.S. federal, state and local levels. Therefore, the amount of income taxes recorded in the Predecessor periods is not representative of the expenses expected in the future. The Company accounts for income taxes pursuant to the asset and liability method which requires it to recognize current tax liabilities or receivables for the amount of taxes it estimates are payable or refundable for the current year, deferred tax assets and liabilities for the expected future tax consequences attributable to temporary differences between the financial statement carrying amounts and their respective tax bases of assets and liabilities and the expected benefits of net operating loss and credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period enacted. A valuation allowance is provided when it is more likely than not that a portion or all of a deferred tax asset will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income and the reversal of deferred tax liabilities during the period in which related temporary differences become deductible. The Company recognizes the benefits of tax return positions in the financial statements if it is “more-likely-than-not” more-likely-than-not
New Accounting Pronouncements: Recently Adopted	New Accounting Pronouncements: Recently Adopted Reference Rate Reform In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting de-designation held-to-maturity one-time available-for-sale held-to-maturity held-to-maturity 2021-01, held-to-maturity Callable Debt Securities In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20 debt security purchased at a premium is within the scope of ASC 310-20-35-33 Business Combination In October 2021, the FASB issued ASU 2021-08, “Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers” 2014-09,
Fair Value Measurement	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The accounting standards related to fair value measurements include a hierarchy for information and valuations used in measuring fair value that is broken down into three levels based on reliability, as follows: • Level 1 — observable inputs such as quoted prices in active markets for identical assets and liabilities; • Level 2 — inputs other than quoted prices for identical assets in active markets that are observable either directly or indirectly; and • Level 3 — unobservable inputs in which there is little or no market data which requires the use of valuation techniques and the development of assumptions.

Accounting Policies and Pract_3

Accounting Policies and Practices (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Estimated Useful Lives of Assets	The Company records fixed assets at cost. We compute depreciation and amortization using the straight-line method on the estimated useful lives of the assets, which are generally as follows: Asset Description Asset Life Capitalized software Lesser of the life of an associated license, or 4 to 7 years Leasehold improvements Lesser of estimated useful life or lease term, not to exceed 10 years Furniture, fixtures and equipment 4 to 10 years Computer equipment 4 to 6 years

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2021
Business Acquisition [Line Items]
Summary of Preliminary Consideration Transferred	The following table summarizes the preliminary consideration transferred (in millions): Cash consideration to prior equityholders (1) $ 1,055 Repayment of debt 1,814 Total cash consideration $ 2,869 Continuing unitholders rollover equity into the Company (2) 1,414 Contingent consideration — Tax Receivable Agreement (3) 618 Contingent consideration — Seller Earnouts (3) 109 Total consideration transferred $ 5,010 Noncontrolling interest (4) $ 800 (1) Includes cash consideration paid to reimburse seller for certain transaction expenses. (2) The Company issued approximately 141 million shares that had a total fair value of approximately $1.4 billion based on the price of $10 per share on July 2, 2021, the acquisition date. (3) The TRA and Seller Earnouts represent liability classified contingent consideration. The estimated fair value of the TRA is preliminary and subject to adjustments in subsequent periods. Refer to Note 9 “Stockholders’ and Members’ Equity”, Note 14 “Financial Instruments” and Note 15 “Fair Value Measurement” for further discussion. (4) The fair value of the noncontrolling interest is estimated based on the fair value of acquired business, which was determined based on the price of the Company’s Class A Common Stock at the July 2, 2021 Closing Date, plus the contingent consideration related to the Seller Earnouts. The fair value of the noncontrolling interest is preliminary and subject to adjustments in subsequent periods. The noncontrolling interest is exchangeable for Class A Common Stock at the option of the holder. Refer to Note 9 “Stockholders’ and Members’ Equity” for additional information.
Summary of Preliminary Purchase Price allocation	The following table summarizes the preliminary purchase price allocation (in millions): Cash and cash equivalents $ 460 Receivables 486 Fiduciary assets 1,015 Other current assets 162 Fixed assets 205 Other assets 425 Accounts payable and accrued liabilities (327 ) Fiduciary liabilities (1,015 ) Other current liabilities (293 ) Debt assumed (2,370 ) Deferred tax liabilities (3 ) Other liabilities (396 ) Intangible assets 4,078 Total identifiable net assets $ 2,427 Goodwill $ 3,383
Summary of Preliminary Values Allocated to Identifiable Intangible Assets and Estimated Useful Lives	The preliminary values allocated to identifiable intangible assets and their estimated useful lives are as follows: Fair value Useful life Identifiable intangible assets (in millions) (in years) Definite lived trade names $ 400 15 Technology related intangibles $ 222 6 Customer-related and contract based intangibles $ 3,456 15
Summary of Unaudited Pro forma Financial Information	The unaudited pro forma financial information is as follows (in millions): Year Ended December 31, 2021 2020 Pro forma revenue $ 2,915 $ 2,728 Pro forma net loss $ (26 ) $ (158 ) Pro forma net loss attributable to controlling interest $ (17 ) $ (129 ) Pro forma net loss attributable to noncontrolling interest $ (9 ) $ (29 )
Retiree Health Exchange
Business Acquisition [Line Items]
Summary of Preliminary Purchase Price allocation	The following table summarizes the preliminary purchase price allocation (in millions): Receivables $ 1 Other current assets 29 Accounts payable and accrued liabilities (13 ) Intangible assets 104 Fair value of net assets acquired and liabilities assumed 121 Goodwill 78 Total consideration $ 199

Other Financial Data (Tables)

Other Financial Data (Tables)	12 Months Ended
	Dec. 31, 2021
Other Financial Data [Abstract]
Summary of Components of Receivables, Net	The components of Receivables, net are as follows (in millions): Successor Predecessor December 31, December 31, Billed and unbilled receivables $ 520 $ 547 Allowance for expected credit losses (5 ) (15 ) Balance at end of period $ 515 $ 532
Summary of Components of Other Current Assets	The components of Other current assets are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred project costs $ 39 $ 53 Prepaid expenses 66 57 Commissions receivable 148 32 Other 49 21 Total $ 302 $ 163
Summary of Components of Other Assets	The components of Other assets are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred project costs $ 274 $ 228 Operating lease right of use asset 120 129 Commissions receivable 34 25 Other 44 26 Total $ 472 $ 408
Summary of Components of Fixed Assets, Net	The components of Fixed assets, net are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Capitalized software $ 55 $ 242 Leasehold improvements 40 63 Computer equipment 102 192 Furniture, fixtures and equipment 12 21 Construction in progress 58 28 Total Fixed assets, gross 267 546 Less: Accumulated depreciation 31 212 Fixed assets, net $ 236 $ 334
Summary of Components of Other Current Liabilities	The components of Other current liabilities are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred revenue $ 148 $ 148 Operating lease liabilities 44 41 Finance lease liabilities 27 28 Other 182 107 Total $ 401 $ 324
Summary of Components of Other Liabilities	The components of Other liabilities are as follows (in millions): Successor Predecessor December 31, 2021 December 31, Deferred revenue $ 55 $ 60 Operating lease liabilities 139 155 Finance lease liabilities 34 59 Unrecognized tax positions 44 48 Other 81 125 Total $ 353 $ 447

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Changes in Net Carrying Amount of Goodwill	The changes in the net carrying amount of goodwill are as follows (in millions): Predecessor Employer Solutions Professional Services Total Balance as of December 31, 2020 $ 1,985 $ 260 $ 2,245 Measurement period adjustments 2 — 2 Foreign currency translation 2 1 3 Balance as of June 30, 2021 $ 1,989 $ 261 $ 2,250 Successor Employer Solutions Professional Services Total Balance as of July 1, 2021 $ 3,309 $ 74 $ 3,383 Acquisitions 255 — 255 Balance as of December 31, 2021 $ 3,564 $ 74 $ 3,638
Schedule of Intangible Assets by Asset Class	Intangible assets by asset class are as follows (in millions): Successor Predecessor December 31, 2021 December 31, 2020 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets: Customer-related and contract based intangibles $ 3,662 $ 119 $ 3,543 $ 2,078 $ 486 $ 1,592 Technology related intangibles 254 20 234 316 180 136 Trade name (finite life) 407 14 393 8 6 2 Trade name (indefinite life) — — — 3 — 3 Total $ 4,323 $ 153 $ 4,170 $ 2,405 $ 672 $ 1,733
Schedule of Intangible Asset Net Carrying Amount and Weighted Average Remaining Useful Lives	The following table reflects intangible asset net carrying amount and weighted average remaining useful lives as of December 31, 2021 (in millions, except for years): Net Carrying Amount Weighted Average Remaining Useful Lives Intangible assets at December 31, 2021: Customer-related and contract based intangibles $ 3,543 14.5 Technology related intangibles 234 5.5 Trade name (finite life) 393 14.3 Total $ 4,170
Schedule of Intangible Assets Expected Annual Amortization Expense	Subsequent to December 31, 2021, the annual amortization expense is expected to be as follows (in millions): Customer-Related and Contract Based Intangibles Technology Related Intangibles Trade Name Intangible 2022 $ 245 $ 43 $ 28 2023 245 43 28 2024 245 43 28 2025 245 43 28 2026 245 42 27 Thereafter 2,318 20 254 Total amortization expense $ 3,543 $ 234 $ 393

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of (Loss) income before income tax expense (benefit)	(Loss) income before income tax expense (benefit) consists of the following (in millions): Successor Predecessor Six Months 2021 Six Months Ended 2021 Year Ended December 31, 2020 2019 (Loss) income before income tax expense (benefit) U.S. (loss) income $ (14 ) $ (28 ) $ (88 ) $ 26 Non-U.S. (9 ) (2 ) (6 ) 12 Total $ (23 ) $ (30 ) $ (94 ) $ 38
Schedule of Provision For Income Tax	The provision for income tax consists of the following (in millions): Successor Predecessor Six Months Ended December 31, Six Months Ended June 30, Year Ended December 31, 2021 2021 2020 2019 Income tax expense (benefit): Current: Federal $ 17 $ 1 $ — $ — State 3 — — 1 Foreign 6 (5 ) 9 13 Total current tax expense (benefit) $ 26 (4 ) $ 9 $ 14 Deferred tax expense: Federal $ — $ — $ (1 ) $ — State — — 1 — Foreign (1 ) (1 ) — 2 Total deferred tax (benefit) expense $ (1 ) $ (1 ) $ — $ 2 Total income tax expense (benefit) $ 25 $ (5 ) $ 9 $ 16
Schedule of Reconciliation of The Effective Tax Rate	The reconciliation of the effective tax rate for all periods presented is as follows (in millions): Successor Predecessor Six Months December 31, Six Months June 30, Year Ended December 31, 2021 2021 2020 2019 Amount % Amount % Amount % Amount % (Loss) income before income tax expense (benefit) $ (23 ) $ (30 ) $ (94 ) $ 38 Provision for income taxes at the statutory rate $ (5 ) 21 % $ — — $ — — $ — — State income taxes, net of federal benefit 3 (12 )% — — 1 — 1 3 % Jurisdictional rate differences (11 ) 49 % 1 (3 )% 9 (11 )% 15 41 % Changes in valuation allowances 23 (100 )% (2 ) 6 % — — — — Benefit of income not allocated to the Company 1 (4 )% — — — — — — Income in separate U.S. tax consolidations 16 (68 )% — — — — — — Non-deductible 8 (35 )% (2 ) 6 % — — — — Tax credits (4 ) 19 % — — — — — — Change in uncertain tax positions (5 ) 24 % — — — — — — Other (1 ) (3 )% (2 ) 7 % (1 ) 1 % — — Income tax expense (benefit) $ 25 (109 )% $ (5 ) 16 % $ 9 (10 )% $ 16 44 %
Schedule of Deferred Tax Assets and Liabilities	The components of the Company’s deferred tax assets and liabilities are as follows (in millions): Successor Predecessor December 31, 2021 December 31, 2020 Deferred tax assets: Employee benefit plans $ 2 $ 1 Interest 13 — Other credits 39 — Tax receivable agreement 64 — Other accrued expenses 10 4 Seller Earnouts 35 — Fixed assets 2 7 Intangible assets — 1 Net operating losses 313 154 Other 4 3 Total 482 170 Valuation allowance on deferred tax assets (226 ) (155 ) Total $ 256 $ 15 Deferred tax liabilities: Intangible assets $ (33 ) $ (3 ) Investment in partnership (246 ) — Other (10 ) (7 ) Total $ (289 ) $ (10 ) Net deferred tax (liability) asset $ (33 ) $ 5
Schedule of Amount of Uncertain Tax Positions	The following is a reconciliation of the Company’s beginning and ending amount of uncertain tax positions (in millions): Balance at January 1, 2020 (Predecessor) $56 Reductions for tax positions of prior years (19) Lapse of statute of limitations (3 ) Balance at December 31, 2020 (Predecessor) $ 34 Additions for tax positions of prior years 1 Balance at June 30, 2021 (Predecessor) $ 35 Balance at July 1, 2021 (Successor) 35 Lapse of statute of limitations (5 ) Balance at December 31, 2021 (Successor) $ 30

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Debt Outstanding	Debt outstanding consisted of the following (in millions): Predecessor Maturity Date December 31, 2020 Term Loan May 1, 2024 $ 634 Term Loan, Amended October 31, 2026 1,976 Secured Senior Notes June 1, 2025 300 Unsecured Senior Notes June 1, 2025 1,230 $24m Revolving Credit Facility May 1, 2022 — $226m Revolving Credit Facility, Amended October 31, 2024 — Other December 31, 2021 10 Total gross debt 4,150 Less: term loan and senior note financing fees and premium, net (72 ) Total debt, net 4,078 Less: current portion of long term debt, net (37 ) Total long term debt, net $ 4,041 Successor Maturity Date December 31, 2021 Term Loan May 1, 2024 $ 72 Term Loan, Amended October 31, 2026 1,958 Term Loan, Third Incremental (1) August 31, 2028 517 Secured Senior Notes June 1, 2025 314 $294m Revolving Credit Facility, Amended August 31, 2026 — Other June 30, 2022 7 Total debt, net 2,868 Less: current portion of long-term debt, net (38 ) Total long-term debt, net $ 2,830 (1) The net balance for the Third Incremental Term Loan includes unamortized debt issuance costs of $6 million.
Schedule of Aggregate Contractual Principal Payments	Aggregate contractual principal payments as of December 31, 2021 are as follows (in millions): 2022 $ 38 2023 32 2024 84 2025 325 2026 1,882 Thereafter 497 Total payments $ 2,858

Stockholders' and Members' Eq_2

Stockholders' and Members' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of Changes in Outstanding Stock	The following table reflects the changes in our outstanding stock: Successor Class A Class B-1 Class B-2 Class V Class Z Balance at July 1, 2021 438,968,920 4,990,453 4,990,453 77,459,687 5,595,577 Warrant redemption 15,315,429 — — — — Issuance for compensation to non-employees (1) 26,398 — — — — Shares granted upon vesting 1,972,134 — — — — Balance at December 31, 2021 456,282,881 4,990,453 4,990,453 77,459,687 5,595,577 (1) Issued to certain members of the Board of Directors in lieu of cash retainer.
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component	Changes in accumulated other comprehensive income (loss), net of noncontrolling interests and tax, are as follows (in millions): Predecessor Foreign Interest (1) Total Balance at December 31, 2018 $ (9 ) $ 12 $ 3 Other comprehensive (loss) income before reclassifications, net of tax 6 (30 ) (24 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax — (4 ) (4 ) Net current period other comprehensive (loss) income 6 (34 ) (28 ) Balance at December 31, 2019 $ (3 ) $ (22 ) $ (25 ) Other comprehensive (loss) income before reclassifications, net of tax 8 (47 ) (39 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax — 22 22 Net current period other comprehensive (loss) income 8 (25 ) (17 ) Balance at December 31, 2020 $ 5 $ (47 ) $ (42 ) Other comprehensive (loss) income before reclassifications, net of tax 8 9 17 Amounts reclassified from accumulated other comprehensive income (loss), net of tax — 14 14 Net current period other comprehensive (loss) income 8 23 31 Balance at June 30, 2021 $ 13 $ (24 ) $ (11 ) Successor Foreign Interest (1) Total Balance at July 1, 2021 $ — $ — $ — Other comprehensive income (loss) before reclassifications — (9 ) (9 ) Tax benefit — 2 2 Other comprehensive income (loss) before reclassifications, net of tax — (7 ) (7 ) Amounts reclassified from accumulated other comprehensive loss — (1 ) (1 ) Tax expense — — — Amounts reclassified from accumulated other comprehensive loss, net of tax — (1 ) (1 ) Net current period other comprehensive income, net of tax — (8 ) (8 ) Balance at December 31, 2021 $ — $ (8 ) $ (8 ) (1) Reclassifications from this category are recorded in Interest expense. See Note 13 “Derivative Financial Instruments” for additional information.

Share-Based Compensation Expe_2

Share-Based Compensation Expense (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Summary of Unit Activity	The following tables summarizes the unit activity related to the RSUs and PRSUs during the Predecessor periods as follows: Predecessor RSUs Weighted PRSUs Weighted Balance as of December 31, 2018 3,525 $ 5,347 6,492 $ 2,952 Granted 862 4,578 1,725 4,572 Vested (1,123 ) 6,581 — — Forfeited (357 ) 4,037 (654 ) 2,626 Balance as of December 31, 2019 2,907 $ 4,785 7,563 $ 3,350 Granted 1,990 4,578 5,469 4,572 Vested (944 ) 5,374 — — Forfeited (954 ) 4,491 (3,809 ) 3,513 Balance as of December 31, 2020 2,999 $ 4,563 9,223 $ 4,015 Granted 254 28,875 389 24,420 Vested (517 ) 5,459 — — Forfeited (121 ) 4,527 (567 ) 2,626 Balance as of June 30, 2021 2,614 $ 6,741 9,045 $ 4,888 The following tables summarizes the unit activity related to the RSUs and PRSUs during the Successor six months ended December 31, 2021: Successor RSUs (1) Weighted PRSUs (1) Weighted Balance as of July 1, 2021 854,764 $ 9.91 7,816,743 $ 9.56 Granted 9,475,330 12.60 9,107,424 12.63 Vested (3,014,054 ) 12.62 — — Forfeited (167,624 ) 12.64 (181,054 ) 12.51 Balance as of December 31, 2021 7,148,416 $ 12.27 16,743,113 $ 11.20 (1) These share totals include both unvested shares and restricted stock units.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Summary of Basic and Diluted Earnings Per Share	Basic and diluted earnings per share are as follows (in millions, except for share and per share amounts): Successor Six Months Ended 2021 Basic and diluted net loss per share: Numerator Net loss attributable to Alight, Inc. — basic and diluted $ (35 ) Denominator Weighted average shares outstanding — basic and diluted 439,800,624 Basic and diluted net loss per share $ (0.08 )

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of Current Reportable Segments	Information regarding the Company’s current reportable segments is as follows (in millions): Revenue Successor Predecessor Six Months Ended 2021 Six Months Ended 2021 Year Ended 2020 2019 Employer Solutions Recurring $ 1,213 $ 1,049 $ 2,051 $ 1,834 Project 134 107 237 250 Total Employer Solutions 1,347 1,156 2,288 2,084 Professional Services Recurring 65 60 108 56 Project 121 124 260 229 Total Professional Services 186 184 368 285 Hosted Business 21 21 72 183 Total $ 1,554 $ 1,361 $ 2,728 $ 2,552 Segment Profit Successor Predecessor Six Months Ended 2021 Six Months Ended 2021 Year Ended 2020 2019 Employer Solutions $ 344 $ 274 $ 533 $ 554 Professional Services 1 7 31 7 Hosted Business (2 ) (3 ) — 35 Total of all reportable segments 343 278 564 596 Share-based compensation 67 5 5 9 Transaction and integration expenses (1) 13 — — — Non-recurring (2) 19 18 — 14 Transformation initiatives (3) — — 8 22 Restructuring 5 9 77 14 Other (4) (10 ) (5 ) 36 19 Depreciation 31 49 91 68 Intangible amortization 153 100 200 185 Operating Income 65 102 147 265 Loss from change in fair value of financial instruments 65 — — — Gain from change in fair value of tax receivable agreement (37 ) — — — Interest expense 57 123 234 224 Other expense, net 3 9 7 3 (Loss) Income Before Income Tax Expense (Benefit) $ (23 ) $ (30 ) $ (94 ) $ 38 (1) Transaction and integration expenses related to acquisitions in 2021. (2) Non-recurring (3) Transformation initiatives in fiscal years 2020 and 2019 includes expenses related to enhancing our data center for both periods, and severance expense for the first half of 2019. (4) Other primarily includes activity related to long-term incentives and expenses related to acquisitions in fiscal years 2020 and 2019, offset by Other expense, net.
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	Revenue by geographic location is as follows (in millions): Successor Predecessor Six Months Ended Six Months Ended Year Ended 2021 2021 2020 2019 United States $ 1,358 $ 1,168 $ 2,353 $ 2,361 Rest of world 196 193 375 191 Total $ 1,554 $ 1,361 $ 2,728 $ 2,552 Long-lived assets, representing Fixed assets, net and Operating lease right of use assets, by geographic location is as follows (in millions): Successor Predecessor December 31, 2021 December 31, United States $ 305 $ 415 Rest of world 51 48 Total $ 356 $ 463

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Swap Agreements That Will Fix the Floating Interest Rates Associated With Its Term Loan	The Company has utilized swap agreements that will fix the floating interest rates associated with its Term Loan as shown in the following table: Designation Date Effective Date Initial Notional Amount Notional Amount Fixed Rate Expiration Date July 2021 August 2020 557,500,000 557,500,000 2.5070 % May 2022 July 2021 August 2020 89,863,420 99,722,020 3.0854 % February 2023 December 2021 August 2020 181,205,050 165,545,350 0.7775 % April 2024 December 2021 August 2020 388,877,200 370,980,400 0.7430 % April 2024 December 2021 May 2022 220,130,318 n/a 0.5170 % April 2024 December 2021 May 2022 306,004,562 n/a 0.5127 % April 2024 December 2021 April 2024 871,205,040 n/a 1.7258 % June 2025 December 2021 April 2024 435,602,520 n/a 1.7290 % June 2025 December 2021 April 2024 435,602,520 n/a 1.7450 % June 2025
Schedule of Fair Values and Location of Outstanding Derivative Instruments Recorded in the Condensed Consolidated Balance Sheets	The fair values and location of outstanding derivative instruments recorded in the Consolidated Balance Sheets are as follows (in millions):​​​​​​​ Successor Predecessor December 31, 2021 December 31, 2020 Assets Other current assets $ 1 $ — Other assets $ 16 $ — Total $ 17 $ — Liabilities Other current liabilities $ 8 $ 28 Other liabilities 1 19 Total $ 9 $ 47

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The Company’s financial assets and liabilities measured at fair value on a recurring basis are as follows (in millions): Successor December 31, 2021 Level 1 Level 2 Level 3 Total Assets Interest rate swaps $ — $ 17 $ — $ 17 Total assets recorded at fair value $ — $ 17 $ — $ 17 Liabilities Interest rate swaps $ — $ 9 $ — $ 9 Contingent consideration liability — — 33 33 Seller Earnouts liability — — 135 135 Tax receivable agreement liability — — 581 581 Total liabilities recorded at fair value $ — $ 9 $ 749 $ 758 Predecessor December 31, 2020 Level 1 Level 2 Level 3 Total Liabilities Interest rate swaps $ — $ 47 $ — $ 47 Contingent consideration liability — — 26 26 Total liabilities recorded at fair value $ — $ 47 $ 26 $ 73
Summary of Changes in Deferred Contingent Consideration Liabilities	The following table summarizes the changes in deferred contingent consideration liabilities (in millions): Successor Predecessor Six Months Ended Six Months Ended 2021 Year Ended Beginning balance $ 29 $ 26 $ 22 Acquisitions 8 2 3 Accretion of contingent consideration — 1 — Remeasurement of acquisition-related contingent consideration (2 ) — 8 Payments (2 ) — (7 ) Ending Balance $ 33 $ 29 $ 26
Reconciliation of TRA Liability and Seller Earnout Liability	The following table provides a reconciliation of the TRA liability and Seller Earnout liability for the Successor six months ended December 31, 2021: Successor TRA Seller Earnouts Balance at July 1, 2021 $ 618 $ 109 Gain from change in fair value of TRA (37 ) — Loss from change in fair value of Seller Earnouts — 26 Balance at December 31, 2021 $ 581 $ 135
Schedule of Financial Liabilities Not Measured at Fair Value on Recurring Basis	The Company’s financial liabilities not measured at fair value on a recurring basis are as follows (in millions): Successor Predecessor December 31, 2021 December 31, 2020 Carrying Value Fair Value Carrying Value Fair Value Liabilities Current portion of long-term debt, net $ 38 $ 38 $ 37 $ 37 Long-term debt, net 2,830 2,834 4,041 4,090 Total $ 2,868 $ 2,872 $ 4,078 $ 4,127

Restructuring and Integration (

Restructuring and Integration (Tables)	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Summary of Restructuring Costs	The following table summarizes restructuring costs by type that have been incurred through December 31, 2021 and are estimated to be incurred through the end of the Plan. Estimated costs by type may be revised in future periods as these assumptions are updated: Successor Predecessor Six Months Ended 2021 Six Months Ended 2021 Inception Estimated Estimated (1) Employer Solutions Severance and Related Benefits $ 1 $ 6 $ 46 $ 13 $ 59 Other Restructuring Costs (2) 3 2 45 17 62 Total Employer Solutions $ 4 $ 8 $ 91 $ 30 $ 121 Professional Services Severance and Related Benefits $ — $ 1 $ 8 $ 2 $ 10 Other Restructuring Costs (2) 1 — 6 3 9 Total Professional Services $ 1 $ 1 $ 14 $ 5 $ 19 Total Restructuring Costs $ 5 $ 9 $ 105 $ 35 $ 140 (1) Actual costs, when incurred, may vary due to changes in the assumptions built into the Plan. Significant assumptions that may change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives. (2) Other costs associated with the Plan primarily include consulting and legal fees and lease consolidation.
Schedule of Accrued Restructuring Liability	As of December 31, 2021, approximately $4 million of the restructuring liability is unpaid and is recorded in Accounts payable and accrued liabilities on the Consolidated Balance Sheets. Predecessor Severance and Other Restructuring Total Accrued restructuring liability as of December 31, 2020 $ 12 $ 3 $ 15 Restructuring charges 7 2 9 Cash payments (13 ) (5 ) (18 ) Accrued restructuring liability as of June 30, 2021 $ 6 $ — $ 6 Successor Severance and Other Restructuring Total Accrued restructuring liability as of July 1, 2021 $ 6 $ — $ 6 Restructuring charges 1 4 5 Cash payments (3 ) (4 ) (7 ) Accrued restructuring liability as of December 31, 2021 $ 4 $ — $ 4

Lease Obligations (Tables)

Lease Obligations (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Summary of Components of Lease Expense	The components of lease expense were as follows (in millions): Successor Predecessor Six Months Six Months Year Ended 2021 2021 2020 2019 Operating lease cost $ 14 $ 16 $ 40 $ 27 Finance lease cost: Amortization of leased assets 12 13 21 15 Interest of lease liabilities 2 2 4 4 Variable and short-term lease cost 3 3 6 8 Sublease income (3 ) (4 ) (6 ) (8 ) Total lease cost $ 28 $ 30 $ 65 $ 46
Schedule of Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to leases was as follows (in millions, except lease term and discount rate): Successor Predecessor December 31, December 31, Operating Leases Operating lease right-of-use asse $ 120 $ 129 Current operating lease liabilities 44 41 Noncurrent operating lease liabilities 139 155 Total operating lease liabilities $ 183 $ 196 Finance Leases Fixed assets, net $ 62 $ 83 Current finance lease liabilities 27 28 Noncurrent finance lease liabilities 34 59 Total finance lease liabilities $ 61 $ 87 Weighted Average Remaining Lease Term (in years) Operating leases 5.8 6.6 Finance leases 2.7 3.5 Weighted Average Discount Rate Operating leases 4.3 % 5.6 % Finance leases 4.4 % 4.4 %
Schedule of Supplemental cash Flow and Other Information Related to Leases	Supplemental cash flow and other information related to leases was as follows (in millions): Successor Predecessor Six Months Six Months Ended Year Ended 2021 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 27 $ 22 $ 42 $ 36 Operating cash flows from finance leases 2 2 4 4 Financing cash flows from finance leases 14 17 24 13 Right-of Operating leases $ 2 $ 10 $ 26 $ 58 Finance leases 2 2 62 24
Summary of Future Lease Payments for Lease Obligations	Future lease payments for lease obligations with initial terms in excess of one year as of December 31, 2021 are as follows (in millions): Finance Operating 2022 $ 23 $ 38 2023 22 34 2024 16 33 2025 4 22 2026 — 17 Thereafter — 46 Total lease payments 65 190 Less: amount representing interest (4 ) (27 ) Total lease obligations, net 61 163 Less: current portion of lease obligations, net (27 ) (37 ) Total long-term portion of lease obligations, net $ 34 $ 126

Basis of Presentation and Nat_2

Basis of Presentation and Nature of Business - Additional Information (Details)	Jul. 02, 2021	Dec. 31, 2021
Basis Of Presentation And Nature Of Business [Line Items]
Date of incorporation		Mar. 26, 2020
Foley Trasimene Acquisition Corp
Basis Of Presentation And Nature Of Business [Line Items]
Business combination, closing date of acquisition	Jul. 2, 2021
Foley Trasimene Acquisition Corp | Alight Holdings
Basis Of Presentation And Nature Of Business [Line Items]
Non-voting ownership percentage held by noncontrolling interest	15.00%
Alight | Foley Trasimene Acquisition Corp | Alight Holdings
Basis Of Presentation And Nature Of Business [Line Items]
Percentage of economic interest	85.00%
Business combination, percentage of voting power	100.00%

Accounting Policies and Pract_4

Accounting Policies and Practices - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 01, 2021
Accounting Policies And Practices [Line Items]
Cash and cash equivalents	$ 372		$ 372	$ 506
Allowance for expected credit losses	5		$ 5	15		$ 0
Foreign exchange gains (losses)	$ 4	$ 9		$ 2	$ 2
Business combination tax receivable agreement percentage of benefit deemed to realize			85.00%
Minimum percentage of unrecognized tax benefit likely to be realized			50.00%
ASU 2020-04
Accounting Policies And Practices [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true		true
Change in accounting principle, accounting standards update, adoption date	Mar. 12, 2020		Mar. 12, 2020
Change in accounting principle, accounting standards update, immaterial effect [true false]	true		true
ASU 2020-08
Accounting Policies And Practices [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true		true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2021		Jan. 1, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true		true
ASU 2021-08
Accounting Policies And Practices [Line Items]
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]	true		true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2021		Jan. 1, 2021

Accounting Policies and Pract_5

Accounting Policies and Practices - Summary of Estimated Useful Lives of Assets (Details)	12 Months Ended
	Dec. 31, 2021
Capitalized Software
Property Plant And Equipment [Line Items]
Estimated useful life	Lesser of the life of an associated license, or 4 to 7 years
Capitalized Software | Minimum
Property Plant And Equipment [Line Items]
Estimated useful life	4 years
Capitalized Software | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	7 years
Leasehold Improvements
Property Plant And Equipment [Line Items]
Estimated useful life	Lesser of estimated useful life or lease term, not to exceed 10 years
Leasehold Improvements | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	10 years
Furniture, Fixtures and Equipment | Minimum
Property Plant And Equipment [Line Items]
Estimated useful life	4 years
Furniture, Fixtures and Equipment | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	10 years
Computer Equipment | Minimum
Property Plant And Equipment [Line Items]
Estimated useful life	4 years
Computer Equipment | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	6 years

Revenue from Contracts with C_2

Revenue from Contracts with Customers - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenue related to unsatisfied performance obligations, description	The Company has elected to apply practical expedients to not disclose the revenue related to unsatisfied performance obligations if (1) the contract has an original duration of one year or less, or (2) the variable consideration is allocated entirely to an unsatisfied performance obligation which is recognized as a series of distinct goods and services that form a single performance obligation.
Customer Relationships
Disaggregation Of Revenue [Line Items]
Practical expedient description	For situations where the duration of the contract is 1 year or less, the Company has applied a practical expedient and recognized the costs of obtaining a contract as an expense when incurred. These costs are recorded in Cost of services, exclusive of depreciation and amortization in the Consolidated Statements of Comprehensive Income (Loss).
Payroll and Cloud Solutions | Customer Relationships
Disaggregation Of Revenue [Line Items]
Capitalized costs, amortization period	7 years
Other Solutions | Customer Relationships
Disaggregation Of Revenue [Line Items]
Capitalized costs, amortization period	15 years
Minimum
Disaggregation Of Revenue [Line Items]
Revenue recognition contract terms	3 years
Minimum | Customer Relationships
Disaggregation Of Revenue [Line Items]
Expected life of the underlying customer relationships	3 years
Maximum
Disaggregation Of Revenue [Line Items]
Revenue recognition contract terms	5 years
Maximum | Customer Relationships
Disaggregation Of Revenue [Line Items]
Expected life of the underlying customer relationships	5 years

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) $ in Millions	Oct. 01, 2021USD ($)	Jul. 02, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2021USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2021USD ($)Acquisition	Dec. 31, 2020USD ($)Acquisition	Dec. 31, 2019USD ($)	Jul. 01, 2021USD ($)
Business Acquisition [Line Items]
Goodwill			$ 3,638	$ 3,638	$ 2,250	$ 3,638	$ 2,245		$ 3,383
Number of business acquisition completed | Acquisition						1	1
Revenue				1,554	1,361		$ 2,728	$ 2,552
Technology Related Intangibles
Business Acquisition [Line Items]
Identifiable intangible assets, Useful life						5 years 6 months
Foley Trasimene Acquisition Corp
Business Acquisition [Line Items]
Consideration transferred		$ 5,010
Business combination, deferred underwriting costs related to initial public offering		36
Business combination, fees related to PIPE Investment		37
Business combination, acquisition-related costs		21
Business combination, seller transaction costs		39
Business combination, advisory and investment banker fees		36
Business combination, certain executive compensation related expenses		36
Goodwill		3,383
Business acquisition, pro forma nonrecurring, direct transaction costs							$ 11
Other current assets		162
Other assets		425
Other current liabilities		293
Other liabilities		396
Fair value of fixed assets		205
Fair value of noncontrolling		800
Goodwill tax deductible		$ 1,600
Foley Trasimene Acquisition Corp | Purchase Accounting Measurement
Business Acquisition [Line Items]
Consideration transferred			40
Goodwill			27	27		$ 27
Other current assets			3	3		3
Other assets			15	15		15
Other current liabilities			9	9		9
Other liabilities			15	15		15
Fair value of fixed assets			1	1		1
Deferred taxes			7	7		7
Fair value of noncontrolling			$ 38	38		$ 38
Foley Trasimene Acquisition Corp | Customer Related and Contract Based Intangibles
Business Acquisition [Line Items]
Identifiable intangible assets, Useful life		15 years
Foley Trasimene Acquisition Corp | Technology Related Intangibles
Business Acquisition [Line Items]
Identifiable intangible assets, Useful life		6 years
Retiree Health Exchange
Business Acquisition [Line Items]
Goodwill	$ 78
Other current assets	29
Goodwill tax deductible	$ 78
Revenue				123
Retiree Health Exchange | Selling, general and administrative expenses
Business Acquisition [Line Items]
Business combination, acquisition-related costs				$ 3	$ 1
Retiree Health Exchange | Customer Related and Contract Based Intangibles
Business Acquisition [Line Items]
Identifiable intangible assets, Useful life	13 years
Retiree Health Exchange | Technology Related Intangibles
Business Acquisition [Line Items]
Identifiable intangible assets, Useful life	5 years

Acquisitions - Summary of Preli

Acquisitions - Summary of Preliminary Consideration Transferred (Details) - Foley Trasimene Acquisition Corp $ in Millions	Jul. 02, 2021USD ($)
Business Acquisition [Line Items]
Cash consideration to prior equityholders	$ 1,055
Repayment of debt	1,814
Total cash consideration	2,869
Continuing unitholders rollover equity into the Company	1,414
Consideration transferred	5,010
Noncontrolling interest	800
Tax Receivable Agreement
Business Acquisition [Line Items]
Contingent consideration	618
Seller Earnouts
Business Acquisition [Line Items]
Contingent consideration	$ 109

Acquisitions - Summary of Pre_2

Acquisitions - Summary of Preliminary Consideration Transferred (Parenthetical) (Details) - Foley Trasimene Acquisition Corp $ / shares in Units, shares in Millions, $ in Billions	Jul. 02, 2021USD ($)$ / sharesshares
Business Acquisition [Line Items]
Business acquisition, equity interest issued, number of shares | shares	141
Business acquisition, equity interest issued, total fair value | $	$ 1.4
Business acquisition, equity interest issued, share price per share | $ / shares	$ 10

Acquisitions - Summary of Pre_3

Acquisitions - Summary of Preliminary Purchase Price allocation (Details) - USD ($) $ in Millions	Dec. 31, 2021	Oct. 01, 2021	Jul. 02, 2021	Jul. 01, 2021	Jun. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 3,638			$ 3,383	$ 2,250	$ 2,245
Foley Trasimene Acquisition Corp
Business Acquisition [Line Items]
Cash and cash equivalents			$ 460
Receivables			486
Fiduciary assets			1,015
Other current assets			162
Fixed assets			205
Other assets			425
Accounts payable and accrued liabilities			(327)
Fiduciary liabilities			(1,015)
Other current liabilities			(293)
Debt assumed			(2,370)
Deferred tax liabilities			(3)
Other liabilities			(396)
Intangible assets			4,078
Total identifiable net assets			2,427
Goodwill			$ 3,383
Retiree Health Exchange
Business Acquisition [Line Items]
Receivables		$ 1
Other current assets		29
Accounts payable and accrued liabilities	$ (13)
Intangible assets		104
Total identifiable net assets		121
Goodwill		78
Total consideration		$ 199

Acquisitions - Summary of Pre_4

Acquisitions - Summary of Preliminary Values Allocated to Identifiable Intangible Assets and Estimated Useful Lives (Details) - USD ($) $ in Millions	Jul. 02, 2021	Dec. 31, 2021
Definite Lived Trade Names
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets, Useful life		14 years 3 months 18 days
Definite Lived Trade Names | Foley Trasimene Acquisition Corp
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets, Fair value	$ 400
Identifiable intangible assets, Useful life	15 years
Technology Related Intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets, Useful life		5 years 6 months
Technology Related Intangibles | Foley Trasimene Acquisition Corp
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets, Fair value	$ 222
Identifiable intangible assets, Useful life	6 years
Customer Related and Contract Based Intangibles | Foley Trasimene Acquisition Corp
Acquired Finite Lived Intangible Assets [Line Items]
Identifiable intangible assets, Fair value	$ 3,456
Identifiable intangible assets, Useful life	15 years

Acquisitions - Summary of Unaud

Acquisitions - Summary of Unaudited Pro forma Financial Information (Details) - Foley Trasimene Acquisition Corp - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Pro forma revenue	$ 2,915	$ 2,728
Pro forma net loss	(26)	(158)
Pro forma net loss attributable to controlling interest	(17)	(129)
Pro forma net loss attributable to noncontrolling interest	$ (9)	$ (29)

Other Financial Data - Summary

Other Financial Data - Summary of Components of Receivables, Net (Details) - USD ($) $ in Millions	Dec. 31, 2021	Jul. 01, 2021	Dec. 31, 2020
Other Financial Data [Abstract]
Billed and unbilled receivables	$ 520		$ 547
Allowance for expected credit losses	(5)	$ 0	(15)
Balance at end of period	$ 515		$ 532

Other Financial Data - Addition

Other Financial Data - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 01, 2021
Other Financial Data [Line Items]
Allowance for expected credit losses	$ 5		$ 5	$ 15		$ 0
Business combination, fixed assets acquired, accumulated depreciation						$ 0
Fixed assets, net	236		$ 236	334
Contract with customer, liability, revenue recognized	44	$ 101		175	$ 155
Operating lease expiration period			2030
Finance Leased Assets Included in Computer Equipment
Other Financial Data [Line Items]
Fixed assets, net	62		$ 62	83
Interest Rate Swaps
Other Financial Data [Line Items]
Derivative asset, noncurrent	16		16
Derivative Asset, Current	1		1
Derivative liability, current	8		8	28
Derivative liability, noncurrent	1		1	19
Other Current Liabilities
Other Financial Data [Line Items]
Deferred compensation liability	83		$ 83
Cost of Services, Exclusive of Depreciation and Amortization
Other Financial Data [Line Items]
Amortization expense	$ 31	$ 33		$ 74	$ 66

Other Financial Data - Summar_2

Other Financial Data - Summary of Components of Other Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Financial Data [Abstract]
Deferred project costs	$ 39	$ 53
Prepaid expenses	66	57
Commissions receivable	148	32
Other	49	21
Total	$ 302	$ 163

Other Financial Data - Summar_3

Other Financial Data - Summary of Components of Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Financial Data [Abstract]
Deferred project costs	$ 274	$ 228
Operating lease right of use asset	120	129
Commissions receivable	34	25
Other	44	26
Total	$ 472	$ 408

Other Financial Data - Summar_4

Other Financial Data - Summary of Components of Fixed Assets, Net (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Total Fixed assets, gross	$ 267	$ 546
Less: Accumulated depreciation	31	212
Fixed assets, net	236	334
Capitalized Software
Property Plant And Equipment [Line Items]
Total Fixed assets, gross	55	242
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total Fixed assets, gross	40	63
Computer Equipment
Property Plant And Equipment [Line Items]
Total Fixed assets, gross	102	192
Furniture, Fixtures and Equipment
Property Plant And Equipment [Line Items]
Total Fixed assets, gross	12	21
Construction in Progress
Property Plant And Equipment [Line Items]
Total Fixed assets, gross	$ 58	$ 28

Other Financial Data - Summar_5

Other Financial Data - Summary of Components of Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Financial Data [Abstract]
Deferred revenue	$ 148	$ 148
Less: current portion of lease obligations, net	44	41
Less: current portion of lease obligations, net	27	28
Other	182	107
Total	$ 401	$ 324

Other Financial Data - Summar_6

Other Financial Data - Summary of Components of Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Financial Data [Abstract]
Deferred revenue	$ 55	$ 60
Total long-term portion of lease obligations, net	139	155
Total long-term portion of lease obligations, net	34	59
Unrecognized tax positions	44	48
Other	81	125
Total	$ 353	$ 447

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets, Net - Summary of Changes in Net Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2021	Jun. 30, 2021
Goodwill [Line Items]
Balance	$ 3,383	$ 2,245
Measurement period adjustments		2
Foreign currency translation		3
Acquisitions	255
Balance	3,638	2,250
Employer Solutions
Goodwill [Line Items]
Balance	3,309	1,985
Measurement period adjustments		2
Foreign currency translation		2
Acquisitions	255
Balance	3,564	1,989
Professional Services
Goodwill [Line Items]
Balance	74	260
Foreign currency translation		1
Acquisitions
Balance	$ 74	$ 261

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 01, 2021
Finite Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 0	$ 0
Amortization of intangible assets	$ 153,000,000	$ 100,000,000		$ 200,000,000	$ 185,000,000
Accumulated amortization	$ 153,000,000		$ 153,000,000	$ 672,000,000		$ 0

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets, Net - Schedule of Intangible Assets by Asset Class (Details) - USD ($)	Dec. 31, 2021	Jul. 01, 2021	Dec. 31, 2020
Intangible Assets
Intangible assets, Gross Carrying Amount	$ 4,323,000,000		$ 2,405,000,000
Intangible assets, Accumulated Amortization	153,000,000	$ 0	672,000,000
Intangible assets, Net Carrying Amount	4,170,000,000		1,733,000,000
Customer Related and Contract Based Intangibles
Intangible Assets
Intangible assets, Gross Carrying Amount	3,662,000,000		2,078,000,000
Intangible assets, Accumulated Amortization	119,000,000		486,000,000
Intangible assets, Net Carrying Amount	3,543,000,000		1,592,000,000
Technology Related Intangibles
Intangible Assets
Intangible assets, Gross Carrying Amount	254,000,000		316,000,000
Intangible assets, Accumulated Amortization	20,000,000		180,000,000
Intangible assets, Net Carrying Amount	234,000,000		136,000,000
Trade Name
Intangible Assets
Intangible assets, Gross Carrying Amount	407,000,000		8,000,000
Intangible assets, Accumulated Amortization	14,000,000		6,000,000
Intangible assets, Net Carrying Amount	$ 393,000,000		2,000,000
Trade Name
Intangible Assets
Intangible assets, Carrying Amount			$ 3,000,000

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets, Net - Schedule of Intangible Asset Net Carrying Amount and Weighted Average Remaining Useful Lives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Intangible assets, Net Carrying Amount	$ 4,170	$ 1,733
Customer Related and Contract Based Intangibles
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Intangible assets, Net Carrying Amount	$ 3,543	1,592
Intangible assets, Weighted Average Remaining Useful Lives	14 years 6 months
Technology Related Intangibles
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Intangible assets, Net Carrying Amount	$ 234	136
Intangible assets, Weighted Average Remaining Useful Lives	5 years 6 months
Trade Name
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Intangible assets, Net Carrying Amount	$ 393	$ 2
Intangible assets, Weighted Average Remaining Useful Lives	14 years 3 months 18 days

Goodwill and Intangible Asset_7

Goodwill and Intangible Assets, Net - Schedule of Intangible Assets Expected Annual Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Customer Related and Contract Based Intangibles
Finite Lived Intangible Assets [Line Items]
2022	$ 245
2023	245
2024	245
2025	245
2026	245
Thereafter	2,318
Intangible assets, Net Carrying Amount	3,543	$ 1,592
Technology Related Intangibles
Finite Lived Intangible Assets [Line Items]
2022	43
2023	43
2024	43
2025	43
2026	42
Thereafter	20
Intangible assets, Net Carrying Amount	234	136
Trade Name
Finite Lived Intangible Assets [Line Items]
2022	28
2023	28
2024	28
2025	28
2026	27
Thereafter	254
Intangible assets, Net Carrying Amount	$ 393	$ 2

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Effective tax rate	(109.00%)	16.00%		(10.00%)	44.00%
U.S. statutory corporate income tax rate	21.00%
Valuation allowances increased			$ 71
Liability uncertain tax positions would impact the effective tax rate	$ 27		27	$ 30
Accrued potential interest and penalties	17		17	18
Decrease in unrecognized tax benefits			(35)
U.S.
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 313		$ 313
Foreign
Income Tax Contingency [Line Items]
Net operating loss carryforwards				$ 154

Income Taxes - Schedule of (Los

Income Taxes - Schedule of (Loss) income before income tax expense (benefit) (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. (loss) income	$ (14)	$ (28)	$ (88)	$ 26
Non-U.S. (loss) income	(9)	(2)	(6)	12
(Loss) Income Before Income Tax Expense (Benefit)	$ (23)	$ (30)	$ (94)	$ 38

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision For Income Taxes (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Federal	$ 17	$ 1
State	3			$ 1
Foreign	6	(5)	$ 9	13
Total current tax expense (benefit)	26	(4)	9	14
Deferred tax expense:
Federal			(1)
State			1
Foreign	(1)	(1)		2
Total deferred tax (benefit) expense	(1)	(1)		2
Total income tax expense (benefit)	$ 25	$ (5)	$ 9	$ 16

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of The Effective Tax Rate (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
(Loss) income before income tax expense (benefit)	$ (23)	$ (30)	$ (94)	$ 38
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Provision for income taxes at the statutory rate	(5)
State income taxes, net of federal benefit	3		1	1
Jurisdictional rate differences	(11)	(1)	9	15
Changes in valuation allowances	23	(2)
Benefit of income not allocated to the Company	1
Income in separate U.S. tax consolidations	16
Non-deductible expenses	8	(2)
Tax credits	(4)
Change in uncertain tax positions	(5)
Other	(1)	(2)	(1)
Total income tax expense (benefit)	$ 25	$ (5)	$ 9	$ 16
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Provision for income taxes at the statutory rate	21.00%
State income taxes, net of federal benefit	(12.00%)			3.00%
Jurisdictional rate differences	49.00%	(3.00%)	(11.00%)	41.00%
Changes in valuation allowances	(100.00%)	6.00%
Benefit of income not allocated to the Company	(4.00%)
Income in separate U.S. tax consolidations	(68.00%)
Non-deductible expenses	(35.00%)	6.00%
Tax credits	19.00%
Change in uncertain tax positions	24.00%
Other	(3.00%)	7.00%	1.00%
Income tax expense (benefit)	(109.00%)	16.00%	(10.00%)	44.00%

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Employee benefit plans	$ 2	$ 1
Interest	13
Other credits	39
Tax receivable agreement	64
Other accrued expenses	10	4
Seller Earnouts	35
Fixed assets	2	7
Intangible assets		1
Net operating losses	313	154
Other	4	3
Total	482	170
Valuation allowance on deferred tax assets	(226)	(155)
Total	256	15
Deferred tax liabilities
Intangible assets	(33)	(3)
Investment in partnership	(246)
Other	(10)	(7)
Total	(289)	(10)
Net deferred tax (liability) asset		$ 5
Net deferred tax (liability) asset	$ (33)

Income Taxes - Schedule of Amou

Income Taxes - Schedule of Amount of Uncertain Tax Positions (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Beginning balance	$ 35	$ 34	$ 56
Reductions for tax positions of prior years			(19)
Lapse of statute of limitations	(5)		(3)
Additions for tax positions of prior years		1
Ending balance	$ 30	$ 35	$ 34

Debt - Schedule of Debt Outstan

Debt - Schedule of Debt Outstanding (Details) - USD ($) $ in Millions		1 Months Ended				12 Months Ended
		Aug. 31, 2021	Aug. 31, 2020	May 31, 2020	May 31, 2017	Dec. 31, 2021		Dec. 31, 2020
Debt Instrument [Line Items]
Gross debt						$ 2,858		$ 4,150
Less: term loan and senior note financing fees and premium, net								(72)
Total debt, net						2,868		4,078
Less: current portion of long term debt, net						(38)		(37)
Total long-term debt, net						2,830		4,041
Term Loan
Debt Instrument [Line Items]
Gross debt						$ 72		$ 634
Maturity Date						May 1, 2024		May 1, 2024
Term Loan, Amended
Debt Instrument [Line Items]
Gross debt						$ 1,958		$ 1,976
Total debt, net			$ 1,986
Maturity Date			Oct. 31, 2026			Oct. 31, 2026		Oct. 31, 2026
Term Loan, Third Incremental
Debt Instrument [Line Items]
Gross debt	[1]					$ 517
Total debt, net		$ 525
Maturity Date		Aug. 31, 2028				Aug. 31, 2028	[1]
Secured Senior Notes
Debt Instrument [Line Items]
Gross debt						$ 314		$ 300
Maturity Date				Jun. 1, 2025		Jun. 1, 2025		Jun. 1, 2025
Unsecured Senior Notes
Debt Instrument [Line Items]
Gross debt								$ 1,230
Maturity Date					Jun. 1, 2025			Jun. 1, 2025
$24m Revolving Credit Facility
Debt Instrument [Line Items]
Maturity Date								May 1, 2022
$226m Revolving Credit Facility, Amended
Debt Instrument [Line Items]
Maturity Date			Oct. 31, 2024					Oct. 31, 2024
$294m Revolving Credit Facility, Amended
Debt Instrument [Line Items]
Maturity Date		Aug. 31, 2026				Aug. 31, 2026
Other
Debt Instrument [Line Items]
Gross debt						$ 7
Line of credit						$ 7		$ 10
Maturity Date						Jun. 30, 2022		Dec. 31, 2021
[1]	The net balance for the Third Incremental Term Loan includes unamortized debt issuance costs of $6 million.

Debt - Schedule of Debt Outst_2

Debt - Schedule of Debt Outstanding (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Aug. 31, 2021	Dec. 31, 2020	Aug. 31, 2020
Term Loan, Third Incremental
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 6
$24m Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity			$ 24
$226m Revolving Credit Facility, Amended
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity			$ 226
$294m Revolving Credit Facility, Amended
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	$ 294	$ 294		$ 226

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($) $ in Millions

1 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

Aug. 31, 2021

Jul. 31, 2021

May 31, 2021

Aug. 31, 2020

May 31, 2020

May 31, 2017

Mar. 31, 2022

Jun. 30, 2021

Dec. 31, 2021

Jun. 30, 2021

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Jul. 31, 2019

Nov. 30, 2017

Debt Instrument [Line Items]

Aggregate increase in debt liability

$ 60

Debt balance

$ 2,868

2,868

$ 4,078

Amortization of financing fees and benefits

(2)

Interest expense related to debt instruments

53

$ 105

204

$ 223

Interest Expense

Debt Instrument [Line Items]

Amortization of financing fees and benefits

2

8

17

17

Revolving Credit Facility

Debt Instrument [Line Items]

Debt term

5 years

Maturity Date

May 1, 2022

Line of credit, maximum borrowing capacity

$ 250

Line of credit

0

$ 0

Capitalized financing fees

$ 1

Revolving Credit Facility | Other Current Assets

Debt Instrument [Line Items]

Unamortized financing fees

1

Amended Revolving Credit Facility

Debt Instrument [Line Items]

Maturity Date

Aug. 31, 2026

Aug. 31, 2026

Line of credit, maximum borrowing capacity

$ 294

$ 226

294

$ 294

Unused letters of credit

4

4

Proceeds from Lines of Credit

0

Amended Revolving Credit Facility | Other Assets

Debt Instrument [Line Items]

Unamortized financing fees

1

1

Unamortized financing fees

1

$ 1

$ 1

$226m Revolving Credit Facility, Amended

Debt Instrument [Line Items]

Maturity Date

Oct. 31, 2024

Oct. 31, 2024

Line of credit, maximum borrowing capacity

$ 226

Other

Debt Instrument [Line Items]

Maturity Date

Jun. 30, 2022

Dec. 31, 2021

Revolving credit facility acquired

$ 21

Line of credit

7

$ 7

$ 10

Term Loan

Debt Instrument [Line Items]

Debt term

7 years

Repayments of principal to refinance debt

$ 270

Maturity Date

May 1, 2024

May 1, 2024

Repayment of principal

$ 556

$ 556

Principal payment

$ 571

Term Loan | LIBOR | Minimum

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.0275%

Term Loan | LIBOR | Maximum

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.03%

Term Loan, Amended

Debt Instrument [Line Items]

Debt balance

$ 1,986

Maturity Date

Oct. 31, 2026

Oct. 31, 2026

Oct. 31, 2026

Debt instrument, variable interest rate basis

1-month

Payment terms

The Company is required to make principal payments at the end of each fiscal quarter based on defined terms in the agreement with the remaining principal balances due on the maturity dates.

Principal payment

$ 13

$ 298

Swap agreement expiration period

2024-05

Term Loan, Amended | Minimum

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.005%

Term Loan, Amended | LIBOR | Minimum

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.0325%

Term Loan, Amended | LIBOR | Maximum

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.035%

Term Loan, Third Incremental

Debt Instrument [Line Items]

Debt balance

$ 525

Maturity Date

Aug. 31, 2028

Aug. 31, 2028

[1]

First mandatory principal payment due

Dec. 31, 2021

Term Loan, Third Incremental | LIBOR

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.03%

Term Loan, Third Incremental | LIBOR | Forecast

Debt Instrument [Line Items]

Maturity Date

Aug. 31, 2028

Amended Term Loan, Third Incremental | LIBOR

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.005%

Secured Senior Notes

Debt Instrument [Line Items]

Maturity Date

Jun. 1, 2025

Jun. 1, 2025

Jun. 1, 2025

Payment terms

interest at a fixed rate of 5.75% per annum, payable semi-annually on June 1 and December 1 of each year

Face amount

$ 300

Interest rate

5.75%

Debt payment beginning date

Dec. 1, 2020

Unsecured Senior Notes

Debt Instrument [Line Items]

Maturity Date

Jun. 1, 2025

Jun. 1, 2025

Payment terms

interest at a fixed rate of 6.750% per annum, payable semi-annually on June 1 and December 1 of each year.

Face amount

$ 270

$ 500

$ 280

$ 180

Interest rate

6.75%

[1]

The net balance for the Third Incremental Term Loan includes unamortized debt issuance costs of $6 million.

Debt - Schedule of Aggregate Co

Debt - Schedule of Aggregate Contractual Principal Payments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
2022	$ 38
2023	32
2024	84
2025	325
2026	1,882
Thereafter	497
Total payments	$ 2,858	$ 4,150

Stockholders' and Members' Eq_3

Stockholders' and Members' Equity - Additional Information (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2021shares	Dec. 31, 2021Vote$ / sharesshares	Dec. 31, 2020shares	Dec. 31, 2019shares	Jul. 02, 2021shares
Class Of Stock [Line Items]
Preferred stock, authorized		1,000,000
Preferred stock, par value | $ / shares		$ 0.0001
Preferred stock, issued		0
Preferred stock, outstanding		0
Class A Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		464,103,972
Common stock, shares outstanding		464,103,972
Common stock, par value | $ / shares		$ 0.0001
Common stock, shares authorized		1,000,000,000
Unvested Class A common stock
Class Of Stock [Line Items]
Common stock, shares issued		7,821,091
Common stock, shares outstanding		7,821,091
Common stock, par value | $ / shares		$ 0.0001
Class B Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		9,980,906
Common stock, shares outstanding		9,980,906
Common stock, par value | $ / shares		$ 0.0001
Issuance of common units		14,999,998
Common stock, shares authorized		20,000,000
Unvested Common Class B
Class Of Stock [Line Items]
Issuance of employee compensation		848,238
Class B-1 Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		4,990,453
Common stock, shares outstanding		4,990,453
Common stock, par value | $ / shares		$ 0.0001
Common stock shares related to employee compensation, unvested		424,119
Common stock conversion, description		Class B-1 common shares vest and automatically convert into shares of Class A Common Stock on a 1-for-1 basis if the volume weighted average price (“VWAP”) of the Class A common shares equals or exceeds $12.50 per share for 20 or more trading days within a consecutive 30-trading day period (or in the event of a change of control or liquidation event that implies a $12.50 per share valuation on a diluted basis).
Common stock shares conversion ratio		1
Common stock shares convertible stock price trigger | $ / shares		$ 12.50
Common stock shares convertible threshold trading days		20 days
Common stock shares convertible threshold consecutive trading days		30 days
Common stock shares convertible stock valuation price on diluted basis | $ / shares		$ 12.50
Class B-1 Common Stock | Alight Holdings
Class Of Stock [Line Items]
Common stock, shares issued		2,509,546
Common stock, shares outstanding		2,509,546
Common stock conversion, description		Class B-1 common units vest and automatically convert into Class A common units of Alight Holdings on a 1-for-1 basis if the VWAP of the Class A common shares equals or exceeds $12.50 per share for 20 or more trading days within a consecutive 30-trading day period (or in the event of a change of control or liquidation event that implies a $12.50 per share valuation on a diluted basis).
Common stock shares conversion ratio		1
Common stock shares convertible stock price trigger | $ / shares		$ 12.50
Common stock shares convertible threshold trading days		20 days
Common stock shares convertible threshold consecutive trading days		30 days
Common stock shares convertible stock valuation price on diluted basis | $ / shares		$ 12.50
Class B-2 Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		4,990,453
Common stock, shares outstanding		4,990,453
Common stock, par value | $ / shares		$ 0.0001
Common stock shares related to employee compensation, unvested		424,119
Common stock conversion, description		Class B-2 common shares vest and automatically convert into shares of Class A common shares on a 1-for-1 basis if the VWAP of the Class A common shares equals or exceeds $15.00 per share for 20 or more trading days within a consecutive 30-trading day period (or in the event of a change of control or liquidation event that implies a $15.00 per share valuation on a diluted basis).
Common stock shares conversion ratio		1
Common stock shares convertible stock price trigger | $ / shares		$ 15
Common stock shares convertible threshold trading days		20 days
Common stock shares convertible threshold consecutive trading days		30 days
Common stock shares convertible stock valuation price on diluted basis | $ / shares		$ 15
Class B-2 Common Stock | Alight Holdings
Class Of Stock [Line Items]
Common stock, shares issued		2,509,546
Common stock, shares outstanding		2,509,546
Common stock conversion, description		Class B-2 common units vest and automatically convert into Class A common units of Alight Holdings on a 1-for-1 basis if the VWAP of the Class A common shares equals or exceeds $15.00 per share for 20 or more trading days within a consecutive 30-trading day period (or in the event of a change of control or liquidation event that implies a $15.00 per share valuation on a diluted basis).
Common stock shares conversion ratio		1
Common stock shares convertible stock price trigger | $ / shares		$ 15
Common stock shares convertible threshold trading days		20 days
Common stock shares convertible threshold consecutive trading days		30 days
Common stock shares convertible stock valuation price on diluted basis | $ / shares		$ 15
Class B-3 Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		0
Common stock, shares outstanding		0
Common stock, par value | $ / shares		$ 0.0001
Common stock, shares authorized		10,000,000
Class V Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		77,459,687
Common stock, shares outstanding		77,459,687
Common stock, par value | $ / shares		$ 0.0001
Common stock shares conversion ratio		1
Common stock, shares authorized		175,000,000
Common shares, votes per share | Vote		1
Shares, outstanding	77,459,687	77,459,687
Class Z Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		5,595,577			8,671,507
Common stock, shares outstanding		5,595,577
Common stock, par value | $ / shares		$ 0.0001
Common stock, shares authorized		12,900,000
Shares, outstanding	5,595,577	5,595,577
Class Z-A Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		5,046,819
Common stock, shares outstanding		5,046,819
Common stock, par value | $ / shares		$ 0.0001
Class Z-B-1 Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		274,379
Common stock, shares outstanding		274,379
Common stock, par value | $ / shares		$ 0.0001
Class Z-B-2 Common Stock
Class Of Stock [Line Items]
Common stock, shares issued		274,379
Common stock, shares outstanding		274,379
Common stock, par value | $ / shares		$ 0.0001
Class Z Common Units
Class Of Stock [Line Items]
Common stock, shares issued		3,075,930
Common stock, shares outstanding		3,075,930
Class Z-A Common Units
Class Of Stock [Line Items]
Common stock, shares issued		2,774,272
Common stock, shares outstanding		2,774,272
Class Z-B-1 Common Units
Class Of Stock [Line Items]
Common stock, shares issued		150,829
Common stock, shares outstanding		150,829
Class Z-B-2 Common Units
Class Of Stock [Line Items]
Common stock, shares issued		150,829
Common stock, shares outstanding		150,829
Class A Units
Class Of Stock [Line Items]
Common stock, shares outstanding		541,563,659
Shares, outstanding		464,103,972
Held by non controlling interest		77,459,687
Common Class A Units
Class Of Stock [Line Items]
Common units granted	0		0	0
Common units/stock voting rights		Each holder of Class A common units is entitled to one vote per unit.
Common Class A-1 Units
Class Of Stock [Line Items]
Common units granted	643		0	0
Common units/stock voting rights		Holders of Class A-1 common units are not entitled to voting rights.
Common Class B Units
Class Of Stock [Line Items]
Common units granted	0		7,459	2,587
Common units/stock voting rights		Holders of Class B common units are not entitled to voting rights.

Stockholders' and Members' Eq_4

Stockholders' and Members' Equity - Schedule of Changes in Outstanding Stock (Details)	6 Months Ended
	Dec. 31, 2021shares
Common Class A
Class Of Stock [Line Items]
Balance, Shares	438,968,920
Warrant redemption	15,315,429
Shares granted upon vesting	1,972,134
Balance, Shares	456,282,881
Common Class A | Board of Directors
Class Of Stock [Line Items]
Issuance for compensation to non-employees	26,398	[1]
Common Class B1
Class Of Stock [Line Items]
Balance, Shares	4,990,453
Balance, Shares	4,990,453
Common Class B2
Class Of Stock [Line Items]
Balance, Shares	4,990,453
Balance, Shares	4,990,453
Class V Common Stock
Class Of Stock [Line Items]
Balance, Shares	77,459,687
Balance, Shares	77,459,687
Class Z Common Stock
Class Of Stock [Line Items]
Balance, Shares	5,595,577
Balance, Shares	5,595,577
[1]	Issued to certain members of the Board of Directors in lieu of cash retainer.

Stockholders' and Members' Eq_5

Stockholders' and Members' Equity - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions		6 Months Ended		12 Months Ended
		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		$ 691	$ 683	$ 805	$ 818
Balance			691	683	805
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		13	5	(3)	(9)
Other comprehensive (loss) income before reclassifications, net of tax			8	8	6
Net current period other comprehensive (loss) income, net of tax			8	8	6
Balance			13	5	(3)
Interest Rate Swaps
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	[1]	(24)	(47)	(22)	12
Other comprehensive income (loss) before reclassifications	[1]	(9)
Tax benefit	[1]	2
Other comprehensive (loss) income before reclassifications, net of tax	[1]	(7)	9	(47)	(30)
Amounts reclassified from accumulated other comprehensive loss	[1]	(1)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	[1]	(1)	14	22	(4)
Net current period other comprehensive (loss) income, net of tax	[1]	(8)	23	(25)	(34)
Balance	[1]	(8)	(24)	(47)	(22)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(11)	(42)	(25)	3
Other comprehensive income (loss) before reclassifications		(9)
Tax benefit		2
Other comprehensive (loss) income before reclassifications, net of tax		(7)	17	(39)	(24)
Amounts reclassified from accumulated other comprehensive loss		(1)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax		(1)	14	22	(4)
Net current period other comprehensive (loss) income, net of tax		(8)	31	(17)	(28)
Balance		$ (8)	$ (11)	$ (42)	$ (25)
[1]	Reclassifications from this category are recorded in Interest expense. See Note 13 “Derivative Financial Instruments” for additional information.

Share-Based Compensation Expe_3

Share-Based Compensation Expense - Summary of Unit Activity related to RSUs (Details) - $ / shares		6 Months Ended		12 Months Ended
		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
RSUs [Member] | Predecessor Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance		2,614	2,999	2,907	3,525
Granted			254	1,990	862
Vested			(517)	(944)	(1,123)
Forfeited			(121)	(954)	(357)
Ending Balance			2,614	2,999	2,907
Weighted Average Grant Date Fair Value Per Unit, Beginning Balance		$ 6,741	$ 4,563	$ 4,785	$ 5,347
Weighted Average Grant Date Fair Value Per Unit, Granted			28,875	4,578	4,578
Weighted Average Grant Date Fair Value Per Unit, Vested			5,459	5,374	6,581
Weighted Average Grant Date Fair Value Per Unit, Forfeited			4,527	4,491	4,037
Weighted Average Grant Date Fair Value Per Unit, Ending Balance			$ 6,741	$ 4,563	$ 4,785
RSUs [Member] | Successor Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance	[1]	854,764
Granted	[1]	9,475,330
Vested	[1]	(3,014,054)
Forfeited	[1]	(167,624)
Ending Balance	[1]	7,148,416	854,764
Weighted Average Grant Date Fair Value Per Unit, Beginning Balance		$ 9.91
Weighted Average Grant Date Fair Value Per Unit, Granted		12.60
Weighted Average Grant Date Fair Value Per Unit, Vested		12.62
Weighted Average Grant Date Fair Value Per Unit, Forfeited		12.64
Weighted Average Grant Date Fair Value Per Unit, Ending Balance		$ 12.27	$ 9.91
Performance-based RSUs [Member] | Predecessor Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance		9,045	9,223	7,563	6,492
Granted			389	5,469	1,725
Forfeited			(567)	(3,809)	(654)
Ending Balance			9,045	9,223	7,563
Weighted Average Grant Date Fair Value Per Unit, Beginning Balance		$ 4,888	$ 4,015	$ 3,350	$ 2,952
Weighted Average Grant Date Fair Value Per Unit, Granted			24,420	4,572	4,572
Weighted Average Grant Date Fair Value Per Unit, Forfeited			2,626	3,513	2,626
Weighted Average Grant Date Fair Value Per Unit, Ending Balance			$ 4,888	$ 4,015	$ 3,350
Performance-based RSUs [Member] | Successor Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance	[1]	7,816,743
Granted	[1]	9,107,424
Forfeited	[1]	(181,054)
Ending Balance	[1]	16,743,113	7,816,743
Weighted Average Grant Date Fair Value Per Unit, Beginning Balance		$ 9.56
Weighted Average Grant Date Fair Value Per Unit, Granted		12.63
Weighted Average Grant Date Fair Value Per Unit, Forfeited		12.51
Weighted Average Grant Date Fair Value Per Unit, Ending Balance		$ 11.20	$ 9.56
[1]	These share totals include both unvested shares and restricted stock units.

Share-Based Compensation Expe_4

Share-Based Compensation Expense - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Performance-based RSUs [Member]
Class Of Stock [Line Items]
Aggregate grant date fair value	$ 115
Total future compensation expense	156		$ 156
Remaining weighted-average amortization period			2 years 2 months 12 days
RSUs [Member]
Class Of Stock [Line Items]
Aggregate grant date fair value	119
Total future compensation expense	84		$ 84
Remaining weighted-average amortization period			1 year 7 months 6 days
RSUs and PRSUs[Member]
Class Of Stock [Line Items]
Share-based compensation	$ 67	$ 5		$ 5	$ 9
2021 Omnibus Incentive Plan | Time-based RSUs [Member]
Class Of Stock [Line Items]
Vesting period	3 years
Percentage of units granted subject to vesting requirements	50.00%		50.00%
2021 Omnibus Incentive Plan | Performance-based RSUs [Member]
Class Of Stock [Line Items]
Percentage of units granted subject to vesting requirements	50.00%		50.00%

Earnings Per Share - Summary of

Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Dec. 31, 2021USD ($)$ / sharesshares
Numerator
Net loss attributable to Alight, Inc. - basic and diluted | $	$ (35)
Denominator
Weighted average shares outstanding - basic and diluted | shares	439,800,624
Basic and diluted net loss per share | $ / shares	$ (0.08)

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Details)	6 Months Ended
	Dec. 31, 2021shares
RSUs [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	7,007,072
Seller Earnouts
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	14,999,998
Performance-based RSUs [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	16,036,220
Noncontrolling Interest
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	77,459,687

Segment Reporting - Schedule of

Segment Reporting - Schedule of Current Reportable Segments by Revenue (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,554	$ 1,361	$ 2,728	$ 2,552
Employer Solutions
Segment Reporting Information [Line Items]
Revenue	1,347	1,156	2,288	2,084
Employer Solutions | Recurring
Segment Reporting Information [Line Items]
Revenue	1,213	1,049	2,051	1,834
Employer Solutions | Project
Segment Reporting Information [Line Items]
Revenue	134	107	237	250
Professional Services
Segment Reporting Information [Line Items]
Revenue	186	184	368	285
Professional Services | Recurring
Segment Reporting Information [Line Items]
Revenue	65	60	108	56
Professional Services | Project
Segment Reporting Information [Line Items]
Revenue	121	124	260	229
Hosted Business
Segment Reporting Information [Line Items]
Revenue	$ 21	$ 21	$ 72	$ 183

Segment Reporting - Schedule _2

Segment Reporting - Schedule of Current Reportable Segments by Segment Profit (Details) - USD ($) $ in Millions		6 Months Ended		12 Months Ended
		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Segment Profit		$ 343	$ 278	$ 564	$ 596
Share-based compensation		67	5	5	9
Transaction and integration expenses	[1]	13
Non-recurring professional expenses	[2]	19	18		14
Transformation initiatives	[3]			8	22
Restructuring		5	9	77	14
Other	[4]	(10)	(5)	36	19
Depreciation		31	49	91	68
Intangible amortization expense		153	100	200	185
Operating Income		65	102	147	265
Loss from change in fair value of financial instruments		65
Gain from change in fair value of tax receivable agreement		(37)
Interest expense		57	123	234	224
Other expense, net		3	9	7	3
(Loss) Income Before Income Tax Expense (Benefit)		(23)	(30)	(94)	38
Employer Solutions
Segment Reporting Information [Line Items]
Segment Profit		344	274	533	554
Professional Services
Segment Reporting Information [Line Items]
Segment Profit		1	7	$ 31	7
Hosted Business
Segment Reporting Information [Line Items]
Segment Profit		$ (2)	$ (3)		$ 35
[1]	Transaction and integration expenses related to acquisitions in 2021.
[2]	Non-recurring professional expenses includes external advisor and legal costs related to the Company’s Business Combination.
[3]	Transformation initiatives in fiscal years 2020 and 2019 includes expenses related to enhancing our data center for both periods, and severance expense for the first half of 2019.
[4]	Other primarily includes activity related to long-term incentives and expenses related to acquisitions in fiscal years 2020 and 2019, offset by Other expense, net.

Segment Reporting - Additional

Segment Reporting - Additional Information (Details) - Customer	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting [Abstract]
Number of single client comprising more than 10% of revenues	0	0

Segment Reporting - Schedule _3

Segment Reporting - Schedule of Revenue and Long-lived Assets by Geographic Location (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,554	$ 1,361	$ 2,728	$ 2,552
Long-lived assets	356		463
United States
Segment Reporting Information [Line Items]
Revenue	1,358	1,168	2,353	2,361
Long-lived assets	305		415
Rest of World
Segment Reporting Information [Line Items]
Revenue	196	$ 193	375	$ 191
Long-lived assets	$ 51		$ 48

Derivative Financial Instrume_3

Derivative Financial Instruments - Schedule of Swap Agreements That Will Fix the Floating Interest Rates Associated With Its Term Loan (Details) - Interest Rate Swaps	12 Months Ended
	Dec. 31, 2021USD ($)
July 2021 Term Loan One
Derivatives Fair Value [Line Items]
Designation Date	2021-07
Effective Date	2020-08
Initial Notional Amount	$ 557,500,000
Notional Amount Outstanding as of December 31, 2021	$ 557,500,000
Fixed Rate	2.507%
Expiration Date	2022-05
July 2021 Term Loan Two
Derivatives Fair Value [Line Items]
Designation Date	2021-07
Effective Date	2020-08
Initial Notional Amount	$ 89,863,420
Notional Amount Outstanding as of December 31, 2021	$ 99,722,020
Fixed Rate	3.0854%
Expiration Date	2023-02
December 2021 Term Loan One
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2020-08
Initial Notional Amount	$ 181,205,050
Notional Amount Outstanding as of December 31, 2021	$ 165,545,350
Fixed Rate	0.7775%
Expiration Date	2024-04
December 2021 Term Loan Two
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2020-08
Initial Notional Amount	$ 388,877,200
Notional Amount Outstanding as of December 31, 2021	$ 370,980,400
Fixed Rate	0.743%
Expiration Date	2024-04
December 2021 Term Loan Three
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2022-05
Initial Notional Amount	$ 220,130,318
Fixed Rate	0.517%
Expiration Date	2024-04
December 2021 Term Loan Four
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2022-05
Initial Notional Amount	$ 306,004,562
Fixed Rate	0.5127%
Expiration Date	2024-04
December 2021 Term Loan Five
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2024-04
Initial Notional Amount	$ 871,205,040
Fixed Rate	1.7258%
Expiration Date	2025-06
December 2021 Term Loan Six
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2024-04
Initial Notional Amount	$ 435,602,520
Fixed Rate	1.729%
Expiration Date	2025-06
December 2021 Term Loan Seven
Derivatives Fair Value [Line Items]
Designation Date	2021-12
Effective Date	2024-04
Initial Notional Amount	$ 435,602,520
Fixed Rate	1.745%
Expiration Date	2025-06

Derivative Financial Instrume_4

Derivative Financial Instruments - Additional Information (Details) $ in Millions	1 Months Ended			12 Months Ended
	Dec. 31, 2021InterestRateSwap	Jul. 31, 2021USD ($)Hedges	May 31, 2021USD ($)	Dec. 31, 2021USD ($)
Derivative [Line Items]
Number of hedges terminated | Hedges		3
Number of previously unfloored hedges amended | Hedges		2
Interest rate floor basis points		0.50%
Derivative losses included in Accumulated other comprehensive income to be reclassified into earnings over next twelve months | $				$ 2
Derivative, Description of Terms				In December 2021, the Company amended four interest rate swaps to have a maturity date ending in April 2024, compared to May 2024 previously. The Company also entered into three new interest rate swaps that will be effective April 2024 and mature June 2025.
Number of interest rate swaps amended | InterestRateSwap	4
Number of interest rate swaps newly entered | InterestRateSwap	3
Term Loan
Derivative [Line Items]
Repayment of principal | $		$ 556	$ 556

Derivative Financial Instrume_5

Derivative Financial Instruments - Schedule of Fair Values and Location of Outstanding Derivative Instruments Recorded in the Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives Fair Value [Line Items]
Total Assets	$ 17
Total Liabilities	9	$ 47
Other Current Assets
Derivatives Fair Value [Line Items]
Total Assets	1
Other Assets
Derivatives Fair Value [Line Items]
Total Assets	16
Other Current Liabilities
Derivatives Fair Value [Line Items]
Total Liabilities	8	28
Other Liabilities
Derivatives Fair Value [Line Items]
Total Liabilities	$ 1	$ 19

Financial Instruments - Seller

Financial Instruments - Seller Earnouts - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021
Financial Instruments [Abstract]
Fair value of seller earnouts		$ 135
Loss (gain) from change in fair value of seller earnouts	$ 26

Financial Instruments - Warrant

Financial Instruments - Warrants - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	May 26, 2020
Class Of Warrant Or Right [Line Items]
Warrants outstanding	0	0
Warrants expiration date	Jul. 2, 2026	Jul. 2, 2026
Warrants expiration term	5 years	5 years
Redemption price per warrant (in dollars per share)		$ 0.10
Number of warrants redeemed		742,918
Loss (gain) from change in fair value of warrant liabilities	$ 39
Redemption of Warrants When the Price per Share of Class A Common Stock Equals or Exceeds $18.00
Class Of Warrant Or Right [Line Items]
Redemption price per warrant (in dollars per share)		$ 0.01
Stock price trigger for redemption of warrants (in dollars per share)		18
Redemption of Warrants When Price per Share of Class A Common Stock Greater than 10.00 but Less than 18.00
Class Of Warrant Or Right [Line Items]
Redemption price per warrant (in dollars per share)		0.10
Redemption of Warrants When Price per Share of Class A Common Stock Greater than 10.00 but Less than 18.00 | Minimum
Class Of Warrant Or Right [Line Items]
Stock price trigger for redemption of warrants (in dollars per share)		10
Redemption of Warrants When Price per Share of Class A Common Stock Greater than 10.00 but Less than 18.00 | Maximum
Class Of Warrant Or Right [Line Items]
Stock price trigger for redemption of warrants (in dollars per share)		$ 18
Class A Common Stock
Class Of Warrant Or Right [Line Items]
Number of warrants issued		15,315,429
Private Placement Warrants
Class Of Warrant Or Right [Line Items]
Number of shares issuable per warrant	1	1
Private Placement Warrants | Class A Common Stock
Class Of Warrant Or Right [Line Items]
Share price per share	$ 11.50	$ 11.50
FTAC | Forward Purchase Warrants
Class Of Warrant Or Right [Line Items]
Number of warrants to be purchased			10,000,000

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Measured at Fair Value on Recurring Basis - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets
Total assets recorded at fair value	$ 17
Liabilities
Total liabilities recorded at fair value	758
Interest Rate Swaps
Assets
Total assets recorded at fair value	17
Liabilities
Total liabilities recorded at fair value	9
Contingent Consideration Liability
Liabilities
Total liabilities recorded at fair value	33
Seller Earnouts Liability
Liabilities
Total liabilities recorded at fair value	135
Tax Receivable Agreement Liability
Liabilities
Total liabilities recorded at fair value	581
Level 2
Assets
Total assets recorded at fair value	17
Liabilities
Total liabilities recorded at fair value	9
Level 2 | Interest Rate Swaps
Assets
Total assets recorded at fair value	17
Liabilities
Total liabilities recorded at fair value	9
Level 3
Liabilities
Total liabilities recorded at fair value	749
Level 3 | Contingent Consideration Liability
Liabilities
Total liabilities recorded at fair value	33
Level 3 | Seller Earnouts Liability
Liabilities
Total liabilities recorded at fair value	135
Level 3 | Tax Receivable Agreement Liability
Liabilities
Total liabilities recorded at fair value	$ 581
Alight Holdings
Liabilities
Total liabilities recorded at fair value		$ 73
Alight Holdings | Interest Rate Swaps
Liabilities
Total liabilities recorded at fair value		47
Alight Holdings | Contingent Consideration Liability
Liabilities
Total liabilities recorded at fair value		26
Alight Holdings | Level 2
Liabilities
Total liabilities recorded at fair value		47
Alight Holdings | Level 2 | Interest Rate Swaps
Liabilities
Total liabilities recorded at fair value		47
Alight Holdings | Level 3
Liabilities
Total liabilities recorded at fair value		26
Alight Holdings | Level 3 | Contingent Consideration Liability
Liabilities
Total liabilities recorded at fair value		$ 26

Fair Value Measurement - Summar

Fair Value Measurement - Summary of Changes in Deferred Contingent Consideration Liabilities (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	$ 29
Acquisitions	8
Accretion of contingent consideration	0
Remeasurement of acquisition-related contingent consideration	(2)
Payments	(2)
Ending Balance	33	$ 29
Alight Holdings [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance	$ 29	26	$ 22
Acquisitions		2	3
Accretion of contingent consideration		1
Remeasurement of acquisition-related contingent consideration			8
Payments			(7)
Ending Balance		$ 29	$ 26

Fair Value Measurement - Reconc

Fair Value Measurement - Reconciliation of TRA Liability and Seller Earnout Liability (Details) $ in Millions	6 Months Ended
	Dec. 31, 2021USD ($)
Tax Receivable Agreement Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	$ 618
Gain from change in fair value of TRA	(37)
Ending Balance	581
Seller Earnouts Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance	109
Loss from change in fair value of Seller Earnouts	26
Ending Balance	$ 135

Fair Value Measurement - Sche_2

Fair Value Measurement - Schedule of Financial Liabilities Not Measured at Fair Value on 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]
Current portion of long term debt	$ 38	$ 37
Long term debt	2,830	4,041
Total debt, net	2,868	4,078
Carrying Value [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current portion of long term debt	38
Long term debt	2,830
Total debt, net	2,868
Carrying Value [Member] | Alight Holdings [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current portion of long term debt		37
Long term debt		4,041
Total debt, net		4,078
Fair Value [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current portion of long term debt	38
Long term debt	2,834
Total debt, net	$ 2,872
Fair Value [Member] | Alight Holdings [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current portion of long term debt		37
Long term debt		4,090
Total debt, net		$ 4,127

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Details)	6 Months Ended		12 Months Ended
	Dec. 31, 2021USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value, assets, Level 1 to Level 2 transfers, amount	$ 0	$ 0	$ 0	$ 0	$ 0
Fair value, assets, Level 2 to Level 1 transfers, amount	0	0	0	0	0
Fair value, liabilities, Level 1 to Level 2 transfers, amount	0	0	0	0	0
Fair value, liabilities, Level 2 to Level 1 transfers, amount	0	0	0	0	0
Fair value, measurement with unobservable inputs reconciliation, liability, transfers into Level 3	0	0		0	0
Fair Value, measurement with unobservable inputs reconciliation, liability, transfers out of Level 3	0	0		$ 0	$ 0
Tax Receivable Agreement Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liability balance	581,000,000	618,000,000	$ 581,000,000
Federal, state and local income tax rate			26.04%
Seller Earnouts Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability expected holding period			6 years 6 months 3 days
Liability balance	$ 135,000,000	$ 109,000,000	$ 135,000,000
Volatility | Seller Earnouts Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.45		0.45
Risk-free Interest Rate | Seller Earnouts Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.0140		0.0140
Measurement Input, Discount Rate [Member] | Tax Receivable Agreement Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.069		0.069

Restructuring and Integration -

Restructuring and Integration - Additional Information (Details) - USD ($) $ in Millions		Dec. 31, 2021	Jun. 30, 2021
Restructuring Cost And Reserve [Line Items]
Expected cumulative costs	[1]	$ 140
Total expenses		105
Accrued restructuring liability		4	$ 6
Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability		4	$ 6
The Plan [Member]
Restructuring Cost And Reserve [Line Items]
Expected cumulative costs		140
Expected annual cost savings by 2022		196
Total expenses		105
The Plan [Member] | Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Expected cumulative costs		69
The Plan [Member] | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Expected cumulative costs		$ 71
[1]	Actual costs, when incurred, may vary due to changes in the assumptions built into the Plan. Significant assumptions that may change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives.

Restructuring and Integration_2

Restructuring and Integration - Summary of Restructuring Costs (Details) - USD ($) $ in Millions		6 Months Ended
		Dec. 31, 2021	Jun. 30, 2021
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 5
Inception to Date		105
Estimated Remaining Costs		35
Estimated Total Cost	[1]	140
Alight Holdings
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			$ 9
Employer Solutions
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		4
Inception to Date		91
Estimated Remaining Costs		30
Estimated Total Cost	[1]	121
Employer Solutions | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			8
Employer Solutions | Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		1
Inception to Date		46
Estimated Remaining Costs		13
Estimated Total Cost	[1]	59
Employer Solutions | Severance and Related Benefits | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			6
Employer Solutions | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Restructuring Costs	[1],[2]	3
Inception to Date	[1],[2]	45
Estimated Remaining Costs	[1],[2]	17
Estimated Total Cost	[1],[2]	62
Employer Solutions | Other Restructuring Costs | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Restructuring Costs	[1],[2]		2
Professional Services
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		1
Inception to Date		14
Estimated Remaining Costs		5
Estimated Total Cost	[1]	19
Professional Services | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			1
Professional Services | Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Inception to Date		8
Estimated Remaining Costs		2
Estimated Total Cost	[1]	10
Professional Services | Severance and Related Benefits | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Restructuring Costs			$ 1
Professional Services | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Restructuring Costs	[1],[2]	1
Inception to Date	[1],[2]	6
Estimated Remaining Costs	[1],[2]	3
Estimated Total Cost	[1],[2]	$ 9
[1]	Actual costs, when incurred, may vary due to changes in the assumptions built into the Plan. Significant assumptions that may change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives.
[2]	Other costs associated with the Plan primarily include consulting and legal fees and lease consolidation.

Restructuring and Integration_3

Restructuring and Integration - Schedule of Accrued Restructuring Liability (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance	$ 6
Restructuring charges	5	$ 9	$ 77	$ 14
Cash payments	(7)
Accrued restructuring liability, Ending Balance	4	6
Alight Holdings
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance	6	15
Restructuring charges		9
Cash payments		(18)
Accrued restructuring liability, Ending Balance		6	15
Severance and Related Benefits
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance	6
Restructuring charges	1
Cash payments	(3)
Accrued restructuring liability, Ending Balance	4	6
Severance and Related Benefits | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance	6	12
Restructuring charges		7
Cash payments		(13)
Accrued restructuring liability, Ending Balance		6	12
Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Restructuring charges	4
Cash payments	$ (4)
Other Restructuring Costs | Alight Holdings
Restructuring Cost And Reserve [Line Items]
Accrued restructuring liability, Beginning balance		3
Restructuring charges		2
Cash payments		$ (5)
Accrued restructuring liability, Ending Balance			$ 3

Employee Benefits - Additional

Employee Benefits - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Defined contribution savings plan expenses	$ 24	$ 31	$ 46	$ 49

Lease Obligations -Schedule of

Lease Obligations -Schedule of Lease Expense (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 14	$ 16	$ 40	$ 27
Finance lease cost:
Amortization of leased assets	12	13	21	15
Interest of lease liabilities	2	2	4	4
Variable and short-term lease cost	3	3	6	8
Sublease income	(3)	(4)	(6)	(8)
Total lease cost	$ 28	$ 30	$ 65	$ 46

Lease Obligations - Schedule of

Lease Obligations - Schedule of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right of use asset	$ 120	$ 129
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Current operating lease liabilities	$ 44	$ 41
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Noncurrent operating lease liabilities	$ 139	$ 155
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Total operating lease liabilities	$ 183	$ 196
Fixed assets, net	62	83
Current finance lease liabilities	27	28
Noncurrent finance lease liabilities	34	59
Total lease obligations, net	$ 61	$ 87
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Computer Equipment	Computer Equipment
Operating leases, Weighted Average Remaining Lease Term (in years)	5 years 9 months 18 days	6 years 7 months 6 days
Finance leases, Weighted Average Remaining Lease Term (in years)	2 years 8 months 12 days	3 years 6 months
Operating leases, Weighted Average Discount Rate	4.30%	5.60%
Finance leases, Weighted Average Discount Rate	4.40%	4.40%

Lease Obligations - Summary of

Lease Obligations - Summary of Supplemental Cash Flow and Other Information Related to Leases (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 27	$ 22	$ 42	$ 36
Operating cash flows from finance leases	2	2	4	4
Financing cash flows from finance leases	14	17	24	13
Right-of use assets obtained in exchange for lease obligations Operating leases	2	10	26	58
Right-of use assets obtained in exchange for lease obligations Finance leases	$ 2	$ 2	$ 62	$ 24

Lease Obligations - Schedule _2

Lease Obligations - Schedule of Future Lease Payments for Lease Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Finance Leases
2022	$ 23
2023	22
2024	16
2025	4
2026	0
Thereafter	0
Total lease payments	65
Less: amount representing interest	(4)
Total lease obligations, net	61	$ 87
Less: current portion of lease obligations, net	(27)	(28)
Total long-term portion of lease obligations, net	34	$ 59
Operating Leases
2022	38
2023	34
2024	33
2025	22
2026	17
Thereafter	46
Total lease payments	190
Less: amount representing interest	(27)
Total operating lease liabilities	163
Less: current portion of lease obligations, net	(37)
Total long-term portion of lease obligations, net	$ 126

Lease Obligations - Additional

Lease Obligations - Additional Information (Details) $ in Millions	Dec. 31, 2021USD ($)
Leases [Abstract]
Operating lease future lease payments include sublease rental income 2022	$ 7
Operating lease future lease payments include sublease rental income 2023	6
Operating lease future lease payments include sublease rental income 2024	5
Operating lease future lease payments include sublease rental income 2025	$ 2

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Purchase Obligations
Commitment And Contingencies [Line Items]
Purchase obligation, 2022	$ 26
Purchase obligation, 2023	26
Purchase obligation, 2024	27
Purchase obligation, 2025	9
Purchase obligation, thereafter	7
Service Obligations
Commitment And Contingencies [Line Items]
Service obligation, 2022	141
Service obligation, 2023	147
Service obligation, 2024	154
Service obligation, 2025	162
Service obligation, thereafter	$ 502
Service obligation agreement termination fees percentage	25.00%
Service obligation maturity period	10 years

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Term Loan, Third Incremental	1 Months Ended		12 Months Ended
	Jan. 31, 2022	Aug. 31, 2021	Dec. 31, 2021	[1]
Subsequent Event [Line Items]
Maturity Date		Aug. 31, 2028	Aug. 31, 2028
Subsequent Event | LIBOR
Subsequent Event [Line Items]
Maturity Date	Aug. 31, 2028
[1]	The net balance for the Third Incremental Term Loan includes unamortized debt issuance costs of $6 million.