Debt - Borrowings and Repayments (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2024	Jun. 30, 2024	Jun. 30, 2023
Debt
Debt repayments		$ 8,752	$ 11,074
Net proceeds		9,180	$ 11,356
Subsequent Event [Member]
Debt
Net proceeds	$ 1,500
Commercial Paper Program [Member]
Debt
Commercial paper repayments		8,500
Commercial paper borrowings		$ 9,200
3.50% senior notes due 2024 [Member]
Debt
Interest rate (as a percent)		3.50%
Debt repayments		$ 156
Senior Notes 4.950 Percent, Due 2027 [Member] | Subsequent Event [Member]
Debt
Interest rate (as a percent)	4.95%
Debt instrument face amount	$ 750
Senior Notes 4.950 Percent, Due 2031 [Member] | Subsequent Event [Member]
Debt
Interest rate (as a percent)	4.95%
Debt instrument face amount	$ 750