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Other Financial Assets - Summary of Loans and Receivables (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2023
Dec. 31, 2022
Loans And Leases Receivable Disclosure [Line Items]    
Short-term loans and receivables Face value ₩ 139,178 ₩ 132,890
Short-term loans and receivables Allowance for doubtful accounts (10) (13)
Short-term loans and receivables Present value discount (1,007) (816)
Short-term loans and receivables 138,161 132,061
Long-term loans and receivables Face value 966,421 968,468
Long-term loans and receivables Allowance for doubtful accounts (80,783) (54,824)
Long-term loans and receivables Present value discount (35,468) (32,334)
Long-term loans and receivables 850,170 881,310
Loans and receivables Face value 1,105,599 1,101,358
Loans and receivables Allowance for doubtful accounts (80,793) (54,837)
Loans and receivables Present value discount (36,475) (33,150)
Loans and receivables 988,331 1,013,371
Loans for tuition    
Loans And Leases Receivable Disclosure [Line Items]    
Short-term loans and receivables Face value 30,497 30,261
Short-term loans and receivables Allowance for doubtful accounts 0 0
Short-term loans and receivables Present value discount (1,007) (816)
Short-term loans and receivables 29,490 29,445
Long-term loans and receivables Face value 419,684 436,131
Long-term loans and receivables Allowance for doubtful accounts (24,745) (37,783)
Long-term loans and receivables Present value discount (35,468) (32,334)
Long-term loans and receivables 359,471 366,014
Loans for housing    
Loans And Leases Receivable Disclosure [Line Items]    
Short-term loans and receivables Face value 35,560 29,630
Short-term loans and receivables Allowance for doubtful accounts 0 0
Short-term loans and receivables Present value discount 0 0
Short-term loans and receivables 35,560 29,630
Long-term loans and receivables Face value 301,840 309,446
Long-term loans and receivables Allowance for doubtful accounts 0 0
Long-term loans and receivables Present value discount 0 0
Long-term loans and receivables 301,840 309,446
Loans for related parties    
Loans And Leases Receivable Disclosure [Line Items]    
Long-term loans and receivables Face value 222,014 187,728
Long-term loans and receivables Allowance for doubtful accounts (43,640) (17,041)
Long-term loans and receivables Present value discount 0 0
Long-term loans and receivables 178,374 170,687
Other loans    
Loans And Leases Receivable Disclosure [Line Items]    
Short-term loans and receivables Face value 73,121 72,999
Short-term loans and receivables Allowance for doubtful accounts (10) (13)
Short-term loans and receivables Present value discount 0 0
Short-term loans and receivables 73,111 72,986
Long-term loans and receivables Face value 22,883 35,163
Long-term loans and receivables Allowance for doubtful accounts (12,398) 0
Long-term loans and receivables Present value discount 0 0
Long-term loans and receivables ₩ 10,485 ₩ 35,163