Consolidated Statements of Financial Position (Parenthetical) $ in Millions	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2023 € / shares	Sep. 30, 2022 USD ($) $ / shares	Sep. 30, 2022 € / shares
Accounts receivable, allowance for credit loss, current | $	$ 89		$ 66
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