Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period			$ 206,223
Other comprehensive income (loss)	$ (486)	$ 813	908	$ (966)
Balance, end of period	253,152	194,683	253,152	194,683
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(9)	(38)	(27)	(13)
Unrealized gains (losses), net of tax	(19)	5	3	14
Tax expense (benefit) included in provision for income taxes	(8)	4	(7)	14
Amounts reclassified from accumulated other comprehensive loss	29	(14)	25	(48)
Other comprehensive income (loss)	10	(9)	28	(34)
Balance, end of period	1	(47)	1	(47)
Derivatives | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses included in other income (expense), net	37	(18)	32	(62)
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(2,511)	(3,687)	(3,582)	(2,138)
Unrealized gains (losses), net of tax	(212)	732	830	(851)
Tax expense (benefit) included in provision for income taxes	(3)	(5)	(10)	(13)
Amounts reclassified from accumulated other comprehensive loss	10	21	39	55
Other comprehensive income (loss)	(202)	753	869	(796)
Balance, end of period	(2,713)	(2,934)	(2,713)	(2,934)
Investments | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses included in other income (expense), net	13	26	49	68
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(2,429)	(2,732)	(2,734)	(2,527)
Other comprehensive income (loss)	(294)	69	11	(136)
Balance, end of period	(2,723)	(2,663)	(2,723)	(2,663)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(4,949)	(6,457)	(6,343)	(4,678)
Other comprehensive income (loss)	(486)	813	908	(966)
Balance, end of period	$ (5,435)	$ (5,644)	$ (5,435)	$ (5,644)