Reporting Entity - List of Subsidiaries (Detail)
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12 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2024 |
| NATE Communications Corporation [Member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
NATE Communications Corporation (Formerly, SK Communications Co., Ltd.)(*2)
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| Location |
Korea
|
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| Primary business |
Internet website services
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| Ownership |
0.00%
|
100.00%
|
| SK Broadband Co., Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
SK Broadband Co., Ltd.(*3)
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| Location |
Korea
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| Primary business |
Fixed-line telecommunication services
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| Ownership |
99.10%
|
99.10%
|
| PS&Marketing Corporation [member] |
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| Disclosure of subsidiaries [line items] |
|
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| Location |
Korea
|
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| Primary business |
Communications device retail business
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| Ownership |
100.00%
|
100.00%
|
| SERVICE ACE Co., Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
SERVICE ACE Co., Ltd.
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| Location |
Korea
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| Primary business |
Call center management service
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| Ownership |
100.00%
|
100.00%
|
| SERVICE TOP Co., Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
SERVICE TOP Co., Ltd.
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| Location |
Korea
|
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| Primary business |
Call center management service
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| Ownership |
100.00%
|
100.00%
|
| SK O&S Co., Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Location |
Korea
|
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| Primary business |
Base station maintenance service
|
|
| Ownership |
100.00%
|
100.00%
|
| SK Telecom China Holdings Co., Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
SK Telecom China Holdings Co., Ltd.
|
|
| Location |
China
|
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| Primary business |
Investment (Holdings company)
|
|
| Ownership |
100.00%
|
100.00%
|
| YTK Investment Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
YTK Investment Ltd.(*2)
|
|
| Location |
Cayman Islands
|
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| Primary business |
Investment
|
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| Ownership |
0.00%
|
100.00%
|
| Atlas investment [member] |
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
Atlas Investment
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| Location |
Cayman Islands
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| Primary business |
Investment
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| Ownership |
100.00%
|
100.00%
|
| SK Telecom Americas, Inc. [member] |
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
SK Telecom Americas, Inc.
|
|
| Location |
USA
|
|
| Primary business |
Information gathering and consulting
|
|
| Ownership |
100.00%
|
100.00%
|
| Happy Hanool Co., Ltd. [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
Happy Hanool Co., Ltd.
|
|
| Location |
Korea
|
|
| Primary business |
Service
|
|
| Ownership |
100.00%
|
100.00%
|
| SK stoa Co., Ltd [member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
SK stoa Co., Ltd.
|
|
| Location |
Korea
|
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| Primary business |
Other telecommunication retail business
|
|
| Ownership |
100.00%
|
100.00%
|
| SAPEON Inc [Member] |
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| Disclosure of subsidiaries [line items] |
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| Subsidiary |
SAPEON Inc.
|
|
| Location |
USA
|
|
| Primary business |
Investment (Holdings company)
|
|
| Ownership |
62.50%
|
62.50%
|
| Astra AI Infra LLC [Member] |
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
Astra AI Infra LLC
|
|
| Location |
USA
|
|
| Primary business |
Investment
|
|
| Ownership |
100.00%
|
100.00%
|
| Home & Service Co., Ltd. [member] |
|
|
| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
Home & Service Co., Ltd.
|
|
| Location |
Korea
|
|
| Primary business |
Operation of information and communication facility
|
|
| Ownership |
100.00%
|
100.00%
|
| Media S Co Ltd [Member] |
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
Media S Co., Ltd.
|
|
| Location |
Korea
|
|
| Primary business |
Production and supply services of broadcasting programs
|
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| Ownership |
100.00%
|
100.00%
|
| SK m&service Co., Ltd |
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
SK m&service Co., Ltd.(*2)
|
|
| Location |
Korea
|
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| Primary business |
Database and Internet website service
|
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| Global AI Platform Corporation [member] |
|
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
Global AI Platform Corporation
|
|
| Location |
USA
|
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| Primary business |
Software development and supply business
|
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| Ownership |
100.00%
|
100.00%
|
| Global AI Platform Corporation Korea [member] |
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| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
Global AI Platform Corporation Korea
|
|
| Location |
Korea
|
|
| Primary business |
Software development and supply business
|
|
| Ownership |
100.00%
|
100.00%
|
| Pan Asia Semiconductor Materials LLC [member] |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Subsidiary |
PanAsia Semiconductor Materials LLC.
|
|
| Location |
Cayman Islands
|
|
| Primary business |
Investment
|
|
| Ownership |
100.00%
|
0.00%
|
| SK m&service Co., Ltd.[member] |
|
|
| Disclosure of subsidiaries [line items] |
|
|
| Ownership |
0.00%
|
100.00%
|
| SK Telecom Innovation Fund, L.P. [member] |
|
|
| Disclosure of subsidiaries [line items] |
|
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| Subsidiary |
SK Telecom Innovation Fund, L.P.
|
|
| Location |
USA
|
|
| Primary business |
Investment
|
|
| Ownership |
100.00%
|
100.00%
|