Geographic and Other Information - Revenue by Product and Services (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of products and services [Line Items]
Revenue	₩ 23,475,567	₩ 24,336,571	₩ 27,790,216
Televisions [member]
Disclosure of products and services [Line Items]
Revenue	7,998,137	9,727,260	11,717,982
Desktop monitors [member]
Disclosure of products and services [Line Items]
Revenue	4,028,007	4,040,025	4,393,482
Tablet products [member]
Disclosure of products and services [Line Items]
Revenue	2,251,049	1,990,766	2,369,634
Notebook computers [member]
Disclosure of products and services [Line Items]
Revenue	2,783,718	2,836,888	2,244,088
Mobile and others [member]
Disclosure of products and services [Line Items]
Revenue	₩ 6,414,656	₩ 5,741,632	₩ 7,065,030

Expiry date 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. Effective 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details