Information About Geographical Areas and Products - Revenue by Product and Services (Detail) - KRW (₩) ₩ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of products and services [Line Items]
Revenue		₩ 26,615,347	₩ 21,330,819	₩ 26,151,781
Revenue included in forward exchange hedging loss	[1],[2]			26,364,737
TV [member]
Disclosure of products and services [Line Items]
Revenue		5,972,637	4,331,474	6,975,269	[1]
IT [Member]
Disclosure of products and services [Line Items]
Revenue		9,419,615	7,853,034	11,197,954	[1]
Mobile and others [member]
Disclosure of products and services [Line Items]
Revenue	[3]	8,942,349	7,146,998	6,371,472	[1]
Auto [member]
Disclosure of products and services [Line Items]
Revenue		₩ 2,280,746	₩ 1,999,313	₩ 1,820,042	[1]

[1] Revenue for 2022 excludes W212,956 million of forward exchange hedging loss which was reclassified from accumulated other comprehensive income to revenue when the sales from the hedged forecast transactions are recognized.

[2] Revenue for 2022 excludes W212,956 million of forward exchange hedging loss which was reclassified from accumulated other comprehensive income to revenue when the sales from the hedged forecast transactions are recognized.

[3] This includes royalties and other revenue.