Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsAbsoluteReturnStrategiesRangeMaximum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return minimum percentage of investments in absolute return strategies to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsAbsoluteReturnStrategiesRangeMinimum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return maximum percentage of investments in alternate investments to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsAlternateInvestmentRangeMaximum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return minimum percentage of investments in alternate investments to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsAlternateInvestmentRangeMinimum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return maximum percentage of investments in fixed income/cash to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsFixedIncomeCashRangeMaximum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return minimum percentage of investments in fixed income/cash to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsFixedIncomeCashRangeMinimum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return maximum percentage of investments in non-U. S. equities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsNonUSEquitiesRangeMaximum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return minimum percentage of investments in non-U. S. equities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsNonUSEquitiesRangeMinimum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return maximum percentage of investments in U. S. equities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	olin_DefinedBenefitPlanRateOfReturnPercentageOfAssetsUSEquitiesRangeMaximum
Namespace Prefix:	olin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Rate of return minimum percentage of investments in U. S. equities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.