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Borrowings - Summary of Long-term Borrowings (Detail) € in Thousands, $ in Thousands, ₩ in Millions | 12 Months Ended |  |
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Dec. 31, 2022 KRW (₩) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 EUR (€) | Dec. 31, 2021 KRW (₩) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 EUR (€)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 0.00% | 0.00% | 0.00% |  |  |
Borrowings | ₩ 10,006,685 |  |  | ₩ 8,437,703 |  |
Total | 8,179,643 |  |  | 6,706,281 |  |
Long-term borrowings [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | 1,083,705 |  |  | 552,995 |  |
Less: Current portion | (167,943) |  |  | (51,803) |  |
Total | ₩ 915,762 |  |  | 501,192 |  |
Long-term borrowings [member] | Export-Import Bank of Korea [member] | Inter-Korean Cooperation Fund [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 1.00% | 1.00% | 1.00% |  |  |
Borrowings | ₩ 1,974 |  |  | 2,467 |  |
Long-term borrowings [member] | Shinhan Bank [member] | General loans [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings |  |  |  | 30,726 | $ 25,918 |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 1 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | LIBOR(3M)+1.650 |  |  |  |  |
Borrowings | ₩ 11,292 | $ 8,910 |  | 10,563 | 8,910 |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 2 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | LIBOR(3M)+1.847 |  |  |  |  |
Borrowings | ₩ 16,475 | 13,000 |  | 15,412 | 13,000 |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 3 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | LIBOR(3M)+2.130 |  |  |  |  |
Borrowings | ₩ 31,683 | 25,000 |  | 29,638 | 25,000 |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 4 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | ₩ 39,855 | $ 31,472 |  | 37,345 | 31,472 |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 4 [member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 1.90% | 1.90% | 1.90% |  |  |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 4 [member] | Top of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.23% | 3.23% | 3.23% |  |  |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 5 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 4.49% | 4.49% | 4.49% |  |  |
Borrowings | ₩ 62,398 |  |  |  |  |
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 6 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | SOFR(3M)+1.300 |  |  |  |  |
Borrowings | ₩ 26,774 | $ 21,127 |  |  |  |
Long-term borrowings [member] | CA-CIB [member] | Long-term CP [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | ₩ 200,000 |  |  | 100,000 |  |
Long-term borrowings [member] | CA-CIB [member] | Long-term CP [member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 1.26% | 1.26% | 1.26% |  |  |
Long-term borrowings [member] | CA-CIB [member] | Long-term CP [member] | Top of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.38% | 3.38% | 3.38% |  |  |
Long-term borrowings [member] | Korea Development Bank [member] | General loans [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | ₩ 38,000 |  |  | 39,000 |  |
Long-term borrowings [member] | Korea Development Bank [member] | General loans [member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.00% | 3.00% | 3.00% |  |  |
Long-term borrowings [member] | Korea Development Bank [member] | General loans [member] | Top of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.61% | 3.61% | 3.61% |  |  |
Long-term borrowings [member] | Woori Bank [Member] | General loans [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | EURIBOR(3M)+0.900 |  |  |  |  |
Borrowings | ₩ 10,404 |  | € 7,700 | 10,336 |  | € 7,700
Long-term borrowings [member] | Woori Bank [Member] | General Loans 1 [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.32% | 3.32% | 3.32% |  |  |
Borrowings | ₩ 15,000 |  |  | 15,000 |  |
Long-term borrowings [member] | Woori Bank [Member] | PF Loans [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | ₩ 40,682 |  |  | 23,614 |  |
Long-term borrowings [member] | Woori Bank [Member] | PF Loans [Member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 2.00% | 2.00% | 2.00% |  |  |
Long-term borrowings [member] | Woori Bank [Member] | PF Loans [Member] | Top of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.47% | 3.47% | 3.47% |  |  |
Long-term borrowings [member] | Kyobo Life Insurance [Member] | PF Loans [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | CD(91D)+1.150%~3.450 |  |  |  |  |
Borrowings | ₩ 66,390 |  |  | 41,640 |  |
Long-term borrowings [member] | Samsung Life Insurance [Member] | PF Loans [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | ₩ 36,883 |  |  | 23,133 |  |
Long-term borrowings [member] | Samsung Life Insurance [Member] | PF Loans [Member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 1.86% | 1.86% | 1.86% |  |  |
Long-term borrowings [member] | Samsung Life Insurance [Member] | PF Loans [Member] | Top of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 4.16% | 4.16% | 4.16% |  |  |
Long-term borrowings [member] | Kookmin Bank and others [member] | Facility loans [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings |  |  |  | 11,584 | $ 9,771 |
Long-term borrowings [member] | JPM [Member] | Long-term CP [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 2.70% | 2.70% | 2.70% |  |  |
Borrowings | ₩ 100,000 |  |  |  |  |
Long-term borrowings [member] | DBS [Member] | Long-term CP [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 4.109% | 4.109% | 4.109% |  |  |
Borrowings | ₩ 100,000 |  |  |  |  |
Long-term borrowings [member] | Hi Investment Securities and Others [Member] | CP [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings | ₩ 182,569 |  |  | 88,510 |  |
Long-term borrowings [member] | Hi Investment Securities and Others [Member] | CP [Member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 2.302% | 2.302% | 2.302% |  |  |
Long-term borrowings [member] | Hi Investment Securities and Others [Member] | CP [Member] | Top of range [member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates | 3.622% | 3.622% | 3.622% |  |  |
Long-term borrowings [member] | NH Jayang [Member] | PF Loans [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | CD(91D)+1.150 |  |  |  |  |
Borrowings | ₩ 59,066 |  |  | 46,267 |  |
Long-term borrowings [member] | Standard Chartered Bank Korea [Member] | PF Loans [Member] |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Annual interest rates description | CD(91D)+1.150%~3.450 |  |  |  |  |
Borrowings | ₩ 44,260 |  |  | ₩ 27,760 |  |

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