Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 2,635	$ 2,130
Short-term investments	63	63
Other assets	1,150	1,138
Certificates of deposit and money market deposit accounts/funds
Cash and Cash Equivalents [Line Items]
Cost	1,597	1,178
Gains/(Losses)	0	0
Fair Value	1,597	1,178
Cash and cash equivalents	1,533	1,112
Short-term investments	63	63
Other assets	1	3
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost	97	91
Gains/(Losses)	10	6
Fair Value	107	97
Cash and cash equivalents	0	0
Short-term investments	0	0
Other assets	$ 107	$ 97