XML 73 R60.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

CONTRIBUTING EMPLOYEE OWNERSHIP PLAN (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Defined Contribution Plan Disclosure [Line Items] |  |
Contributing Employee Ownership Plan Initial Vesting Period Vested Percentage - After 2 Years | 50.00% |
Contributing Employee Ownership Plan Vesting Period - 2 Years | 2 years |
Contributing Employee Ownership Plan Initial Vesting Period Vested Percentage - After 3 Years | 100.00% |
Contributing Employee Ownership Plan Vesting Period - 3 Years | 3 years |
Defined Contribution Plan Employer Contribution of Eligible Compensation | $ 10,600,000 | $ 11,600,000
Employer matching contributions to employee ownership plan | 3,600,000 | 3,700,000
Total CEOP Expense | $ 14,200,000 | $ 15,300,000
Minimum |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation | 5.00% |
Maximum |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation | 7.50% |

X
- Definition Contributing Employee Ownership Plan Initial Vesting Period Vested Percentage - After 2 Years + References No definition available. + Details
Name: | oln_ContributingEmployeeOwnershipPlanInitialVestingPeriodVestedPercentageAfter2Years
Namespace Prefix: | oln_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contributing Employee Ownership Plan Initial Vesting Period Vested Percentage - After 3 Years + References No definition available. + Details
Name: | oln_ContributingEmployeeOwnershipPlanInitialVestingPeriodVestedPercentageAfter3Years
Namespace Prefix: | oln_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contributing Employee Ownership Plan Vesting Period - 2 Years + References No definition available. + Details
Name: | oln_ContributingEmployeeOwnershipPlanVestingPeriod2Years
Namespace Prefix: | oln_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contributing Employee Ownership Plan Vesting Period - 3 Years + References No definition available. + Details
Name: | oln_ContributingEmployeeOwnershipPlanVestingPeriod3Years
Namespace Prefix: | oln_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contribution to an individual retirement account as a percentage of employee's eligible compensation. + References No definition available. + Details
Name: | oln_ContributionToIndividualRetirementAccountPercentageOfEmployeesEligibleCompensation
Namespace Prefix: | oln_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of employer contribution to a defined contribution plan based on employees' eligible compensation. + References No definition available. + Details
Name: | oln_DefinedContributionPlanEmployerContributionOfEligibleCompensation
Namespace Prefix: | oln_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total CEOP Expense + References No definition available. + Details
Name: | oln_TotalCEOPExpense
Namespace Prefix: | oln_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |