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Finance Lease Receivables (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finance lease receivables of the Group as lessor [Line Items]
Present value of minimum lease payment	₩ 982,213	₩ 862,621
Gross amount
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	1,925,452	1,829,172
Present value of minimum lease payment	983,346	862,621
Gross amount | Not Later Than 1 Year
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	124,918	49,542
Present value of minimum lease payment	84,688	13,067
Gross amount | 1~5 Years
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	467,518	381,181
Present value of minimum lease payment	223,622	203,990
Gross amount | More than 5 years
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	1,333,016	1,398,449
Present value of minimum lease payment	675,036	645,564
Allowance for doubtful accounts
Finance lease receivables of the Group as lessor [Line Items]
Present value of minimum lease payment	₩ (1,133)	₩ 0

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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.

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No definition available.

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- Definition

The present value of minimum finance lease payments receivable. 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 17
-IssueDate 2018-01-01
-Paragraph 47
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_47_a&doctype=Standard&book=b
-URIDate 2018-03-16

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