LOANS AND ADVANCES TO CUSTOMERS (Details) - Schedule of Net Investment in Finance Leases - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
LOANS AND ADVANCES TO CUSTOMERS (Details) - Schedule of Net Investment in Finance Leases [Line Items]
Gross investment in finance leases, receivable:	£ 2,839	£ 3,730
Unearned future finance income on finance leases	(692)	(1,038)
Rentals received in advance	(53)	(64)
Net investment in finance leases	472,498	457,958
Not later than 1 year [member]
LOANS AND ADVANCES TO CUSTOMERS (Details) - Schedule of Net Investment in Finance Leases [Line Items]
Gross investment in finance leases, receivable:	680	551
Later than 1 year and not later than 5 years [member]
LOANS AND ADVANCES TO CUSTOMERS (Details) - Schedule of Net Investment in Finance Leases [Line Items]
Gross investment in finance leases, receivable:	1,106	1,618
Later than 5 years [member]
LOANS AND ADVANCES TO CUSTOMERS (Details) - Schedule of Net Investment in Finance Leases [Line Items]
Gross investment in finance leases, receivable:	1,053	1,561
Gross and Lease Financing [Member]
LOANS AND ADVANCES TO CUSTOMERS (Details) - Schedule of Net Investment in Finance Leases [Line Items]
Net investment in finance leases	£ 2,094	£ 2,628

The aggregate of: (a) the minimum lease payments receivable by the lessor under a finance lease; and (b) any unguaranteed residual value accruing to the lessor. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

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The amount of loans and advances the entity has made to customers. [Refer: Advances received]

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The amount of unearned finance income relating to the finance lease payments receivable. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. [Refer: Finance income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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