Other Financial Information - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Other Non Operating Income Expense [Line Items]
Net loss (gain) from asset sales		$ (7)	$ 132
Reversed the allowance with credit of restructuring and other charges, net	$ 83
Valuation allowance with credit to cost of goods sold	$ 46
Former Eastalco Site Sale And Warrick Rolling Mill [Member]
Other Non Operating Income Expense [Line Items]
Net loss (gain) from asset sales			$ (120)