Leases - Summary of Maturity Analysis for Operating Lease Receivables (Detail) ₩ in Millions	Dec. 31, 2025 KRW (₩)
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	₩ 256,652
Less than 1 year [member]
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	136,517
1 year ~ 2 year [member]
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	79,931
2 year ~ 3 year [member]
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	39,731
3 year ~ 4 years [member]
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	109
4 year ~ 5 year [member]
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	109
More than 5 year [member]
Disclosure of maturity analysis of operating lease payments [line items]
Undiscounted operating lease payments to be received	₩ 255