| (c) | The aging of trade accounts and note receivable, other accounts receivable and long-term non-trade receivable at the reporting date are as follows: |
| (In millions of won) | December 31, 2016 | |||||||||||||||||||||||
| Book value | Impairment loss | |||||||||||||||||||||||
| Trade
accounts and notes receivable |
Other accounts receivable(*) |
Long-term non-trade receivable |
Trade accounts and notes receivable |
Other accounts receivable(*) |
Long-term non-trade receivable |
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|
Not past due |
4,958,591 | 140,893 | 2,643 | (1,488 | ) | (669 | ) | (23 | ) | |||||||||||||||
|
Past due 1-15 days |
386 | 2,298 | — | — | (20 | ) | — | |||||||||||||||||
|
Past due 16-30 days |
417 | 309 | — | — | — | — | ||||||||||||||||||
|
Past due 31-60 days |
65 | 640 | — | — | (6 | ) | — | |||||||||||||||||
|
Past due more than 60 days |
22 | 545 | — | — | (398 | ) | — | |||||||||||||||||
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| 4,959,481 | 144,685 | 2,643 | (1,488 | ) | (1,093 | ) | (23 | ) | ||||||||||||||||
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| (*) | Other accounts receivable includes non-trade receivable and accrued income. |
| (In millions of won) | December 31, 2017 | |||||||||||||||||||||||
| Book value | Impairment loss | |||||||||||||||||||||||
|
Trade accounts and notes receivable |
Other accounts receivable(*) |
Long-term non-trade receivable |
Trade accounts and notes receivable |
Other accounts receivable(*) |
Long-term non-trade receivable |
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|
Not past due |
4,323,465 | 164,755 | 8,738 | (1,631 | ) | (905 | ) | — | ||||||||||||||||
|
Past due 1-15 days |
2,652 | 488 | — | (1 | ) | (3 | ) | — | ||||||||||||||||
|
Past due 16-30 days |
631 | 65 | — | — | (1 | ) | — | |||||||||||||||||
|
Past due 31-60 days |
— | 208 | — | — | (2 | ) | — | |||||||||||||||||
|
Past due more than 60 days |
4 | 622 | — | — | (400 | ) | — | |||||||||||||||||
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| 4,326,752 | 166,138 | 8,738 | (1,632 | ) | (1,311 | ) | — | |||||||||||||||||
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| (*) | Other accounts receivable includes non-trade receivable and accrued income. |