Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Sales Returns and Allowances) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Accounting Policies [Abstract] | |||
| Accrual for estimated sales returns and allowances | $ 330 | $ 447 | |
| Returns and allowances | $ 1,800 | $ 2,200 | $ 2,200 |