Fair Value Measurements - Narrative (Details)	Jun. 30, 2022 USD ($) instrument	Jun. 30, 2022 CNY (¥) instrument	Sep. 30, 2021 USD ($)
Interest rate cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of instruments held | instrument	2	2
Notional amount of derivative asset | $	$ 200,000,000
Net Investment Hedging | Cross-currency interest rate swaps | China
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of instruments held | instrument	1	1
Notional amount of derivative asset	$ 23,000,000	¥ 150,000,000
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long-term debt | $	$ 2,500,000,000		$ 3,800,000,000