Provisions - Changes in Provisions (Parenthetical) (Detail) - Legal proceedings provision [member] ₩ in Millions	Dec. 31, 2018 KRW (₩)
Disclosure of other provisions [line items]
Current provisions	₩ 36,844
Non-current provisions	₩ 57,310

The amount of non-current provisions. [Refer: Provisions]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 54
-Subparagraph l
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_l&doctype=Standard
-URIDate 2018-03-16

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