Consolidated Statements of Financial Position (Parenthetical) $ in Millions |
Jun. 30, 2025
USD ($)
$ / shares
|
Jun. 30, 2025
€ / shares
|
Sep. 30, 2024
USD ($)
$ / shares
|
Sep. 30, 2024
€ / shares
|
|---|---|---|---|---|
| Accounts receivable, allowance for credit loss, current | $ | $ 231 | $ 210 | ||
| Ordinary shares, par value (in dollars per share) | $ 0.01 | $ 0.01 | ||
| Preferred shares, par value (in dollars per share) | $ 0.01 | $ 0.01 | ||
| Common Class A | ||||
| Ordinary shares, par value (in dollars per share) | € / shares | € 1.00 | € 1.00 |