v3.26.1
Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance, beginning of period $ 343,479 $ 268,477  
Other comprehensive income (loss) 63 2,243 $ 753
Balance, end of period 442,387 343,479 268,477
Derivatives      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance, beginning of period (8) (3) (27)
Unrealized gains (losses), net of tax (42) 77 (14)
Tax expense (benefit) included in provision for income taxes (13) 21 (10)
Amounts reclassified from accumulated other comprehensive loss 50 (82) 38
Other comprehensive income (loss) 8 (5) 24
Balance, end of period 0 (8) (3)
Derivatives | Other Income (Expense), Net      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Reclassification adjustments for (gains) losses included in other income (expense), net 63 (103) 48
Investments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance, beginning of period (1,051) (2,625) (3,582)
Unrealized gains (losses), net of tax 232 1,560 915
Tax expense (benefit) included in provision for income taxes 4 (3) (11)
Amounts reclassified from accumulated other comprehensive loss (17) 14 42
Other comprehensive income (loss) 215 1,574 957
Balance, end of period (836) (1,051) (2,625)
Investments | Other Income (Expense), Net      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Reclassification adjustments for (gains) losses included in other income (expense), net (21) 17 53
Translation adjustments and other      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance, beginning of period (2,288) (2,962) (2,734)
Other comprehensive income (loss) (160) 674 (228)
Balance, end of period (2,448) (2,288) (2,962)
Accumulated other comprehensive loss      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance, beginning of period (3,347) (5,590) (6,343)
Other comprehensive income (loss) 63 2,243 753
Balance, end of period $ (3,284) $ (3,347) $ (5,590)