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Related party disclosures - Additional Information (Detail) - Barclay associate [member] - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of transactions between related parties [Line Items] |  |  |
Loan to and from material associate investment (offset in accordance with IAS32) | $ 237 | $ 237 |
Average interest rate on interest payable and receivable relating to loan to and from material associate investment | 2.00% | 1.40% |
Short-term advances made to material associate investment and repaid |  |  | $ 22

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Interest payable (receivable) average rate. + References No definition available. + Details
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- Definition Loans both payable and receivable offset net. + References No definition available. + Details
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- Definition Short-term loans and advances. + References No definition available. + Details
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- Details
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