XML 55 R44.htm IDEA: XBRL DOCUMENT
v3.25.2

Discontinued Operations - Additional Information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 12, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Fair Value |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Fair value consideration |  | $ 42 |  | $ 42 |  | $ 37
Divested Business | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Total consideration | $ 1,200 |  |  |  |  |
Proceeds from divestiture of businesses | 1,000 |  |  |  |  |
Aggregate principal amount, consideration | 50 |  |  |  |  |
Aggregate principal amount, contingent consideration | 150 |  |  |  |  |
Fair value contingent consideration | $ 43 |  |  |  |  |
Stated interest rate | 8.00% |  |  |  |  |
Initial period | 18 months |  |  |  |  |
Option to extend | 6 months |  |  |  |  |
Transition services agreement | $ 15 |  |  |  |  |
TSA services income |  | 8 |  | 18 |  |
Pass-through costs |  | 15 |  | 30 |  |
Revenue |  | 13 | $ 249 | 37 | $ 506 |
Loss on sale |  | 1 | 0 | 8 | 0 |
Cost of services, exclusive of depreciation and amortization |  | 13 | $ 167 | 37 | $ 354 |
Divested Business | Discontinued Operations, Disposed of by Sale | Customer Care Commercial Services |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Revenue |  | 12 |  | 24 |  |
Divested Business | Discontinued Operations, Disposed of by Sale | Cloud Services Segments |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cost of services, exclusive of depreciation and amortization |  | $ 13 |  | $ 37 |  |
Divested Business | Fair Value | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Fair value consideration | $ 35 |  |  |  |  |

X
- Definition Disposal Group, Including Discontinued Operation, Consideration, Aggregate Principal Amount + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationConsiderationAggregatePrincipalAmount
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Consideration, Aggregate Principal Amount, Fair Value + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationConsiderationAggregatePrincipalAmountFairValue
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Consideration, Stated Interest Rate + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationConsiderationStatedInterestRate
Namespace Prefix: | alit_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Consideration, Transition Services Agreement + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationConsiderationTransitionServicesAgreement
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Consideration, Transition Services Agreement, Income + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationConsiderationTransitionServicesAgreementIncome
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disposal Group, Including Discontinued Operation, Consideration, Transition Services Agreement, Pass-through Costs + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationConsiderationTransitionServicesAgreementPassThroughCosts
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Disposal Group, Including Discontinued Operation, Contingent Consideration, Aggregate Principal Amount + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationContingentConsiderationAggregatePrincipalAmount
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Contingent Consideration, Aggregate Principal Amount, Fair Value + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationContingentConsiderationAggregatePrincipalAmountFairValue
Namespace Prefix: | alit_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Transition Services Agreement, Initial Period + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationTransitionServicesAgreementInitialPeriod
Namespace Prefix: | alit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disposal Group, Including Discontinued Operation, Transition Services Agreement, Option To Extend + References No definition available. + Details
Name: | alit_DisposalGroupIncludingDiscontinuedOperationTransitionServicesAgreementOptionToExtend
Namespace Prefix: | alit_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5C -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-5C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147483475/205-20-45-3B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483475/205-20-45-3 + Details
Name: | us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of costs of goods sold attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-5B + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-5B + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3A + Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
Name: | us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=alit_DivestedBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=alit_CustomerCareCommercialServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=alit_CloudServicesSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |