Other Financial Information - Schedule of Other Noncurrent Assets (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Gas supply prepayment	$ 310	$ 377
Prepaid gas transmission contract	275	304
Value added tax credits	290	215
Deferred mining costs, net	147	149
Prepaid pension benefit	205	164
Goodwill	144	144
Noncurrent restricted cash	54	106
Noncurrent prepaid tax asset	69	78
Intangibles, net	30	35
Other	97	92
Other assets, noncurrent, total	$ 1,621	$ 1,664