Derivatives and Fair Value Measurements - Volume of Company 's Activity in Derivative Instruments (Detail) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) T gal	Dec. 31, 2021 USD ($) T gal
Hot Roll Coil Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount	123,158	176,859
Aluminum Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount	9,354	20,949
Nickel Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount	550	857
Diesel Fuel Swap Contracts [Member]
Derivatives Fair Value [Line Items]
Notional Amount | gal	490,000	840,000
Foreign Exchange Contracts [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount | $	$ 3.0	$ 4.5
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Derivative notional amount | $	$ 100.0	$ 160.0