Other Financial Information - Schedule of Other Noncurrent Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Other Financial Information [Abstract]
Value added tax credits	$ 341	$ 294
Gas Supply Prepayment	291	311
Prepaid gas transmission contract	284	285
Deferred mining costs, net	170	161
Prepaid pension benefit	158	146
Goodwill	146	145
Noncurrent prepaid tax asset	70	72
Noncurrent restricted cash	63	56
Intangibles, net	39	29
Other	92	94
Other assets, noncurrent, total	$ 1,654	$ 1,593