Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ 343,479
Other comprehensive income	586	$ 1,408
Balance, end of period	363,076	287,723
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(8)	(3)
Unrealized gains (losses), net of tax	(7)	29
Tax expense (benefit) included in provision for income taxes	(1)	10
Amounts reclassified from accumulated other comprehensive loss	4	(39)
Other comprehensive income	(3)	(10)
Balance, end of period	(11)	(13)
Derivatives | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses included in other income (expense), net	5	(49)
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(1,051)	(2,625)
Unrealized gains (losses), net of tax	695	1,118
Tax expense (benefit) included in provision for income taxes	2	1
Amounts reclassified from accumulated other comprehensive loss	(8)	(4)
Other comprehensive income	687	1,114
Balance, end of period	(364)	(1,511)
Investments | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses included in other income (expense), net	(10)	(5)
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(2,288)	(2,962)
Other comprehensive income	(98)	304
Balance, end of period	(2,386)	(2,658)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(3,347)	(5,590)
Other comprehensive income	586	1,408
Balance, end of period	$ (2,761)	$ (4,182)