Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 2,130	$ 1,769
Short-term investments	63	90
Other assets	1,138	1,092
Certificates of deposit and money market deposit accounts
Cash and Cash Equivalents [Line Items]
Cost	1,178	914
Gross Unrealized Gains	0	0
Fair Value	1,178	914
Cash and cash equivalents	1,112	808
Short-term investments	63	90
Other assets	3	16
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost	91	71
Gross Unrealized Gains	6	0
Fair Value	97	71
Cash and cash equivalents	0	0
Short-term investments	0	0
Other assets	$ 97	$ 71