Other Financial Information - Schedule of Other Noncurrent Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Financial Information [Abstract]
Gas supply prepayment	$ 283	$ 311
Prepaid gas transmission contract	297	285
Value-added tax credits	336	294
Deferred mining costs, net	187	161
Goodwill	146	145
Prepaid pension benefit	125	146
Noncurrent prepaid tax asset	73	72
Noncurrent restricted cash	71	56
Intangibles, net	37	29
Other	95	94
Other assets, noncurrent, total	$ 1,650	$ 1,593