Supplementary Information - Change in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting [Abstract]
Balance at beginning of year	$ 340	$ 319	$ 301
Additions	18	54	47
Amounts written off	(21)	(33)	(29)
Balance at end of year	$ 337	$ 340	$ 319