Name:	dwsf_AnnualizedGeneralPartnerAdministrativeFeePercentage
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Incentive fee as percentage of new trading profits annually.

No definition available.

Name:	dwsf_IncentiveFeeAsPercentageOfNewTradingProfitsAnnually
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The leverage applied to assets and traded pursuant to the diversified program.

No definition available.

Name:	dwsf_LeverageAppliedToAssets
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Management fees payable annual percentage.

No definition available.

Name:	dwsf_ManagementFeesPayableAnnualPercentage
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Management fees payable monthly percentage.

No definition available.

Name:	dwsf_ManagementFeesPayableMonthlyPercentage
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Maximum threshold of fees for percentage of net assets.

No definition available.

Name:	dwsf_MaximumThresholdOfFeesForPercentageOfNetAssets
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Minimum threshold of fees for percentage of net assets, general partner.

No definition available.

Name:	dwsf_MinimumThresholdOfFeesForPercentageOfNetAssetsGeneralPartner
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Monthly general partner administrative fee percentage.

No definition available.

Name:	dwsf_MonthlyGeneralPartnerAdministrativeFeePercentage
Namespace Prefix:	dwsf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number of classes of limited partnership interests.

No definition available.

Name:	dwsf_NumberOfClassesOfLimitedPartnershipInterests
Namespace Prefix:	dwsf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	dei_LegalEntityAxis=dwsf_CeresTacticalCurrencyLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CounterpartyNameAxis=dwsf_GreenwaveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: