Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY OXFORD STREET TRUST

Prospectus Date

rr_ProspectusDate

Apr. 28, 2012

Fidelity Four-in-One Index Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

fost_SupplementTextBlock

Supplement to the
Fidelity^® Four-in-One
Index Fund
April 28, 2012
Prospectus

Effective January 1, 2013, the following information replaces the information under "Shareholder fees" under the heading "Fee Table" in the "Fund Summary" section on page 3.

Shareholder fees
(fees paid directly from your investment) None