Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ 268,477
Other comprehensive income (loss)	1,408	$ (594)
Balance, end of period	287,723	220,714
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(3)	(27)
Unrealized gains (losses), net of tax	29	(15)
Tax expense (benefit) included in provision for income taxes	10	(10)
Amounts reclassified from accumulated other comprehensive loss	(39)	36
Other comprehensive income (loss)	(10)	21
Balance, end of period	(13)	(6)
Derivatives | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses included in other income (expense), net	(49)	46
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(2,625)	(3,582)
Unrealized gains (losses), net of tax	1,118	(283)
Tax expense (benefit) included in provision for income taxes	1	(6)
Amounts reclassified from accumulated other comprehensive loss	(4)	23
Other comprehensive income (loss)	1,114	(260)
Balance, end of period	(1,511)	(3,842)
Investments | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses included in other income (expense), net	(5)	29
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(2,962)	(2,734)
Other comprehensive income (loss)	304	(355)
Balance, end of period	(2,658)	(3,089)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(5,590)	(6,343)
Other comprehensive income (loss)	1,408	(594)
Balance, end of period	$ (4,182)	$ (6,937)