Long-term Payables Other - Summary of Long-term Payables - Other (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2018	Dec. 31, 2017
Trade and other non-current payables [abstract]
Payables related to acquisition of frequency usage rights	₩ 1,939,082	₩ 1,328,630
Other	29,702	18,133
Other non current payables	₩ 1,968,784	₩ 1,346,763

The amount of non-current payables for the purchase of non-current assets. [Refer: Payables for purchase of non-current assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_NoncurrentPayablesForPurchaseOfNoncurrentAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant