XML 69 R58.htm IDEA: XBRL DOCUMENT
v3.23.1

Stockholders' Equity - Additional Information (Details) |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 06, 2023 $ / shares shares | Mar. 31, 2023 USD ($) Vote $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Aug. 01, 2022 USD ($) $ / shares | Jul. 02, 2021 shares
Class Of Stock [Line Items] |  |  |  |  |
Preferred stock, authorized |  | 1,000,000.0 | 1,000,000.0 |  |
Preferred stock, par value | $ / shares |  | $ 0.0001 | $ 0.0001 |  |
Preferred stock, issued |  | 0 | 0 |  |
Preferred stock, outstanding |  | 0 | 0 |  |
Common stock, par value | $ / shares |  |  |  | $ 0.0001 |
Increase in equity | $ |  | $ 194,000,000 |  |  |
Additional paid-in-capital deferred tax assets | $ |  | 18,000,000 |  |  |
Common stock repurchase, authorized amount | $ |  |  |  | $ 100,000,000 |
Remaining authorized amount for future share repurchase program | $ |  | 78,000,000 |  |  |
Tax Receivable Agreement Liability |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Additional TRA liabilities | $ |  | $ 67,000,000 | $ 43,000,000 |  |
Class A Common Stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 497,234,220 | 478,300,000 |  |
Common stock, shares outstanding |  | 497,234,220 | 478,300,000 |  |
Common stock, par value | $ / shares |  | $ 0.0001 | $ 0.0001 |  |
Common stock, shares authorized |  | 1,000,000,000.0 | 1,000,000,000.0 |  |
Conversion of stock |  | 19,345,591 |  |  |
Number of shares repurchased |  | 1,148,435 |  |  |
Total cost | $ |  | $ 10,000,000 |  |  |
Class A Common Stock | Secondary Offering |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Number of shares issued | 46,000,000 |  |  |  |
Public offering price | $ / shares | $ 9.00 |  |  |  |
Number of days option to underwriter to purchase additional common shares | 30 days |  |  |  |
Class A Common Stock | Over-Allotment Option |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Number of shares issued | 6,900,000 |  |  |  |
Unvested Class A common stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares outstanding |  | 6,992,844 |  |  |
Class B Common Stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 10,000,000.0 | 10,000,000.0 |  |
Common stock, shares outstanding |  | 10,000,000.0 | 10,000,000.0 |  |
Common stock, par value | $ / shares |  | $ 0.0001 | $ 0.0001 |  |
Issuance of common units |  | 14,999,998 |  |  |
Common stock, shares authorized |  | 20,000,000.0 | 20,000,000.0 |  |
Unvested Common Class B |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Issuance of employee compensation |  | 764,301 |  |  |
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 shares related to employee compensation, unvested |  | 382,151 |  |  |
Common stock conversion, description |  | Class B-1 Common Stock 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 shares of Class A Common Stock 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 Units | 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 shares of Class A Common Stock 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 shares related to employee compensation, unvested |  | 382,151 |  |  |
Common stock conversion, description |  | Class B-2 Common Stock vest and automatically convert into shares of Class A Common Stock on a 1-for-1 basis if the VWAP of the shares of Class A Common Stock 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 |  | $ 15.00 |  |  |
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 |  | $ 15.00 |  |  |
Class B-2 Common Units | 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 shares of Class A Common Stock 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 |  | $ 15.00 |  |  |
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 |  | $ 15.00 |  |  |
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 |  | 44,135,874 | 63,500,000 |  |
Common stock, shares outstanding |  | 44,135,874 | 63,500,000 |  |
Common stock, par value | $ / shares |  | $ 0.0001 | $ 0.0001 |  |
Common stock shares conversion ratio |  | 1 |  |  |
Common stock, shares authorized |  | 175,000,000.0 | 175,000,000.0 |  |
Common shares, votes per share | Vote |  | 1 |  |  |
Shares, outstanding |  | 44,135,874 | 63,481,465 |  |
Conversion of stock |  | (19,345,591) |  |  |
Class Z Common Stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 5,197,081 | 5,200,000 |  | 8,671,507
Common stock, shares outstanding |  | 5,197,081 | 5,200,000 |  |
Common stock, par value | $ / shares |  | $ 0.0001 | $ 0.0001 |  |
Common stock, shares authorized |  | 12,900,000 | 12,900,000 |  |
Shares, outstanding |  | 5,197,081 | 5,595,577 |  |
Class Z-A Common Stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 4,663,187 |  |  |
Common stock, shares outstanding |  | 4,663,187 |  |  |
Class Z-B-1 Common Stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 266,947 |  |  |
Common stock, shares outstanding |  | 266,947 |  |  |
Class Z-B-2 Common Stock |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 266,947 |  |  |
Common stock, shares outstanding |  | 266,947 |  |  |
Class Z Common Units |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 2,856,875 |  |  |
Common stock, shares outstanding |  | 2,856,875 |  |  |
Class Z-A Common Units |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 2,563,387 |  |  |
Common stock, shares outstanding |  | 2,563,387 |  |  |
Class Z-B-1 Common Units |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 146,744 |  |  |
Common stock, shares outstanding |  | 146,744 |  |  |
Class Z-B-2 Common Units |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares issued |  | 146,744 |  |  |
Common stock, shares outstanding |  | 146,744 |  |  |
Class A Units |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock, shares outstanding |  | 541,370,094 |  |  |
Shares, outstanding |  | 497,234,220 |  |  |
Held by non controlling interest |  | 44,135,874 |  |  |

X
- Definition Adjustments to additional paid in capital deferred tax assets. + References No definition available. + Details
Name: | alit_AdjustmentsToAdditionalPaidInCapitalDeferredTaxAssets
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Common stock convertible conversion ratio. + References No definition available. + Details
Name: | alit_CommonStockConvertibleConversionRatio
Namespace Prefix: | alit_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of votes that each common share is entitled. + References No definition available. + Details
Name: | alit_CommonStockNumberOfVotesPerShare
Namespace Prefix: | alit_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common stock shares convertible stock price trigger. + References No definition available. + Details
Name: | alit_CommonStockSharesConvertibleStockPriceTrigger
Namespace Prefix: | alit_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common stock shares convertible stock valuation price on diluted basis. + References No definition available. + Details
Name: | alit_CommonStockSharesConvertibleStockValuationPriceOnDilutedBasis
Namespace Prefix: | alit_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common stock shares convertible threshold consecutive trading days. + References No definition available. + Details
Name: | alit_CommonStockSharesConvertibleThresholdConsecutiveTradingDays
Namespace Prefix: | alit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common stock shares convertible threshold trading days. + References No definition available. + Details
Name: | alit_CommonStockSharesConvertibleThresholdTradingDays
Namespace Prefix: | alit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability, conversion of noncontrolling interest. + References No definition available. + Details
Name: | alit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConversionOfNoncontrollingInterest
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Issuance of common units. + References No definition available. + Details
Name: | alit_IssuanceOfCommonUnits
Namespace Prefix: | alit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Issuance of employee compensation shares. + References No definition available. + Details
Name: | alit_IssuanceOfEmployeeCompensationShares
Namespace Prefix: | alit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of days option to underwriter to purchase additional common shares. + References No definition available. + Details
Name: | alit_NumberOfDaysOptionToUnderwriterToPurchaseAdditionalCommonShares
Namespace Prefix: | alit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock Issued During Period shares Conversion Of Noncontrolling Interest + References No definition available. + Details
Name: | alit_StockIssuedDuringPeriodSharesConversionOfNoncontrollingInterest
Namespace Prefix: | alit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stockholders equity held by non controlling interest. + References No definition available. + Details
Name: | alit_StockholdersEquityHeldByNonControllingInterest
Namespace Prefix: | alit_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of basis for conversion of convertible common stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockConversionBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares issued which are neither cancelled nor held in the treasury. + References No definition available. + Details
Name: | us-gaap_SharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The increase (decrease) in stockholders' equity during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 + Details
Name: | us-gaap_StockholdersEquityPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=alit_TaxReceivableAgreementLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=alit_SecondaryOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_UnvestedCommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_UnvestedCommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassBOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassBOneUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=alit_AlightHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassBTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassBTwoUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassBThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZBOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZBTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZAUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZBOneUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_CommonClassZBTwoUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=alit_ClassAUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |