Fair Value Measurements - Narrative (Details)	Dec. 31, 2021 USD ($) instrument	Sep. 30, 2021 USD ($)
Interest rate cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of instruments held | instrument	2
Notional amount of derivative asset | $	$ 200,000,000
Net Investment Hedging | Cross-currency interest rate swaps | Japan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of instruments held | instrument	0
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long-term debt | $	$ 3,700,000,000	$ 3,800,000,000