Indebtedness - Narrative (Details) - Senior Notes - USD ($)	Apr. 12, 2020	Sep. 29, 2019
Class A-2-I Notes
Debt Instrument [Line Items]
Stated interest rate	3.982%
Notes	$ 573,563,000	$ 575,000,000
Class A-2-II Notes
Debt Instrument [Line Items]
Stated interest rate	4.476%
Notes	$ 274,313,000	275,000,000
Class A-2-III Notes
Debt Instrument [Line Items]
Stated interest rate	4.97%
Notes	$ 448,875,000	450,000,000
Class A-1 Variable Funding Notes
Debt Instrument [Line Items]
Debt issuable under purchase agreement	150,000,000.0
Letters of credit outstanding	41,100,000	45,600,000
Notes	107,876,000	$ 0
Remaining borrowings available	$ 1,100,000

Face (par) amount of debt instrument at time of issuance.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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