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Finance lease and operating lease by lessor (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	₩ 1,829,172	₩ 2,169,352
Present value of minimum lease payment	862,621	972,874
Not Later Than 1 Year [Member]
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	49,542	55,708
Present value of minimum lease payment	13,067	12,225
1~5 Years [Member]
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	381,181	423,152
Present value of minimum lease payment	203,990	214,176
More than 5 years [Member]
Finance lease receivables of the Group as lessor [Line Items]
Minimum lease payment	1,398,449	1,690,492
Present value of minimum lease payment	₩ 645,564	₩ 746,473

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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

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 2017-01-01
-Paragraph 47
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_47_a&doctype=Standard&book=B
-URIDate 2017-03-09

+ Details

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- References

No definition available.

+ Details

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