Derivative Financial Instruments - Outstanding Foreign Currency Forward Contracts (Detail) € in Millions, ₩ in Millions, ¥ in Millions, £ in Millions, kr in Millions, $ in Millions, $ in Millions, $ in Millions |
Sep. 30, 2026
KRW (₩)
|
Sep. 30, 2026
NOK (kr)
|
Sep. 30, 2026
USD ($)
|
Sep. 30, 2026
CAD ($)
|
Sep. 30, 2026
EUR (€)
|
Sep. 30, 2026
JPY (¥)
|
Sep. 30, 2026
SGD ($)
|
Sep. 30, 2026
GBP (£)
|
Dec. 31, 2025
KRW (₩)
|
Dec. 31, 2025
NOK (kr)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2025
CAD ($)
|
Dec. 31, 2025
EUR (€)
|
Dec. 31, 2025
JPY (¥)
|
Dec. 31, 2025
SGD ($)
|
Dec. 31, 2025
GBP (£)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Forward Contracts [Member] | ||||||||||||||||
| Derivative [Line Items] | ||||||||||||||||
| Foreign currency, Cash flow hedging | ₩ 37,255 | kr 2,054 | $ 1,079 | $ 569 | € 274 | ¥ 31 | $ 0 | £ 0 | ₩ 49,790 | kr 2,756 | $ 827 | $ 0 | € 190 | ¥ 569 | $ 18 | £ 3 |