Derivatives and Fair Value Measurements - Volume of Company 's Activity in Derivative Instruments (Detail) $ in Millions |
Jun. 30, 2026
USD ($)
T
gal
|
Dec. 31, 2025
USD ($)
T
gal
|
|---|---|---|
| Hot Roll Coil Swap Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Notional Amount | 54,869 | 16,972 |
| Aluminum Swap Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Notional Amount | 24,347 | 20,075 |
| Nickel Swap Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Notional Amount | 623 | 288 |
| Copper Swap Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Notional Amount | 6,575 | 6,297 |
| Natural Gas Swap Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Notional Amount | gal | 79,240 | 147,160 |
| Diesel Fuel Swap Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Notional Amount | gal | 1,064,000 | 1,964,000 |
| Foreign Exchange Contracts [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Derivative notional amount | $ | $ 4.3 | $ 1.8 |