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Other Financial Assets - Summary of Loans and Receivables (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2024
Dec. 31, 2023
Loans And Leases Receivables Disclosure [Line Items]    
Short-term loans and receivables ₩ 3,494,717 ₩ 3,107,397
Long-term loans and receivables 4,945,990 3,546,214
Loans for tuition    
Loans And Leases Receivables Disclosure [Line Items]    
Short-term loans and receivables Face value 34,484 30,497
Short-term loans and receivables Allowance for doubtful accounts (5,156) 0
Short-term loans and receivables Present value discount (1,084) (1,007)
Short-term loans and receivables 28,244 29,490
Long-term loans and receivables Face value 364,685 419,684
Long-term loans and receivables Allowance for doubtful accounts (4,888) (24,745)
Long-term loans and receivables Present value discount (35,888) (35,468)
Long-term loans and receivables 323,909 359,471
Loans for housing    
Loans And Leases Receivables Disclosure [Line Items]    
Short-term loans and receivables Face value 43,171 35,560
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 43,171 35,560
Long-term loans and receivables Face value 266,208 301,840
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 266,208 301,840
Loans for related parties    
Loans And Leases Receivables Disclosure [Line Items]    
Long-term loans and receivables Face value 260,227 222,014
Long-term loans and receivables Allowance for doubtful accounts (61,950) (43,640)
Long-term loans and receivables Present value discount 0 0
Long-term loans and receivables 198,277 178,374
Other loans    
Loans And Leases Receivables Disclosure [Line Items]    
Short-term loans and receivables Face value 37,506 73,121
Short-term loans and receivables Allowance for doubtful accounts 0 (10)
Short-term loans and receivables Present value discount 0 0
Short-term loans and receivables 37,506 73,111
Long-term loans and receivables Face value 10,833 22,883
Long-term loans and receivables Allowance for doubtful accounts 0 (12,398)
Long-term loans and receivables Present value discount 0 0
Long-term loans and receivables 10,833 10,485
Loans    
Loans And Leases Receivables Disclosure [Line Items]    
Short-term loans and receivables Face value 115,161 139,178
Short-term loans and receivables Allowance for doubtful accounts (5,156) (10)
Short-term loans and receivables Present value discount (1,084) (1,007)
Short-term loans and receivables 108,921 138,161
Long-term loans and receivables Face value 901,953 966,421
Long-term loans and receivables Allowance for doubtful accounts (66,838) (80,783)
Long-term loans and receivables Present value discount (35,888) (35,468)
Long-term loans and receivables 799,227 850,170
Loans and receivables Face value 1,017,114 1,105,599
Loans and receivables Allowance for doubtful accounts (71,994) (80,793)
Loans and receivables Present value discount (36,972) (36,475)
Loans and receivables ₩ 908,148 ₩ 988,331