Commitments and Contingencies - Changes in Asset Retirement Obligations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of year	$ 400	$ 380	$ 307
Accretion expense	11	11	10
Liabilities incurred and liabilities assumed in business combinations	12	34	79
Liabilities settled	(2)	(28)	(14)
Revisions in estimated cash flows	9	(13)	(3)
Liabilities reclassified from assets held for sale	2	16	1
Balance at end of year	$ 432	$ 400	$ 380