IMPAIRMENT (Details) - Schedule of Movement in Impairment Charges - Impairment charged to the income statement £ in Millions	12 Months Ended
Dec. 31, 2017 GBP (£)
Impairment losses on loans and receivables:
Total impairment losses on loans and receivables	£ 691
Impairment of available-for-sale financial assets	6
Other credit risk provisions	(9)
Total impairment charged to the income statement	688
Loans and advances to customers [Member]
Impairment losses on loans and receivables:
Impairment losses on loans and receivables	697
Debt securities classified as loans and receivables [Member]
Impairment losses on loans and receivables:
Impairment losses on loans and receivables	£ (6)

The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

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