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Lease | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Lease |
20. | Lease
The Group’s non-cancellable lease arrangements are as follows: The Group as the Lessee Finance Lease Details of finance lease assets as of December 31, 2016 and 2017, are as follows:
(in millions of Korean won) |  | 2016 |  |  | 2017 |
Acquisition costs |  | ￦ | 298,631 |  |  | ￦ | 325,975 |
Less: Accumulated depreciation |  |  | (105,013 | ) |  |  | (126,091 | )
Net balance |  | ￦ | 193,618 |  |  | ￦ | 199,884 |
As of December 31, 2017, the Group recognized financial lease assets as other property and equipment. The related depreciation amounted to ￦58,535 million (2016: ￦50,704 million) for the year ended December 31, 2017. Details of future minimum lease payments As of December 31, 2016 and 2017, under finance lease contracts are summarized below:
(in millions of Korean won) |  | 2016 |  |  | 2017 |
Total amount of minimum lease payments |  |  |  |  |  |  |  |
Within one year |  | ￦ | 79,644 |  |  | ￦ | 88,441 |
From one year to five years |  |  | 131,813 |  |  |  | 132,113 |
More than five years |  |  | — |  |  |  | 81 |
|  |  | 211,457 |  |  |  | 220,635 |
Unrealized interest expense |  |  | 30,743 |  |  |  | 43,758 |
Net amount of minimum lease payments |  |  |  |  |  |  |  |
Within one year |  |  | 64,008 |  |  |  | 68,651 |
From one year to five years |  |  | 116,706 |  |  |  | 108,146 |
More than five years |  |  | — |  |  |  | 80 |
Total |  | ￦ | 180,714 |  |  | ￦ | 176,877 |
Operating Lease Details of future minimum lease payments As of December 31, 2016 and 2017, under operating lease contracts are summarized below:
(in millions of Korean won) |  | 2016 |  |  | 2017 |
Within one year |  | ￦ | 102,015 |  |  | ￦ | 109,258 |
From one year to five years |  |  | 270,462 |  |  |  | 266,434 |
Thereafter |  |  | 16,549 |  |  |  | 1,635 |
Total |  | ￦ | 389,026 |  |  | ￦ | 377,327 |
Operating lease expenses incurred for the years ended December 31, 2015, 2016 and 2017, amounted to ￦111,776 million, ￦121,852 million and ￦126,250 million, respectively.

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- Definition The entire disclosure for leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Section Leases in the financial statements of lessees -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=sect_Leasesinthefinancialstatementsoflessees&doctype=Standard&book=B -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Section Leases in the financial statements of lessors -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=sect_Leasesinthefinancialstatementsoflessors&doctype=Standard&book=B -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2017-01-01 -Section Presentation -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2017-03-01&anchor=sect_Presentation&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2017-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2017-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2017-03-09 + Details
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