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Borrowings - Fiscal 2020 Refinancing Transactions Narrative (Details)		12 Months Ended
	Jan. 15, 2020 USD ($)	Oct. 02, 2020 USD ($) financial_institution	Sep. 28, 2018 USD ($)	Sep. 27, 2019 USD ($)	Jan. 18, 2018 USD ($)	Dec. 11, 2017 USD ($)
Debt Instrument [Line Items]
Long-term debt				$ 0
Number of financial institutions \| financial_institution		3
Secured Debt
Debt Instrument [Line Items]
Consolidated secured debt ratio		5.125
Secured Debt \| Base Rate
Debt Instrument [Line Items]
Effective rate		0.625%
Debt instrument, minimum interest rate		0.00%
Secured Debt \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		0.625%
Secured Debt \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		0.125%
Secured Debt \| Eurocurrency And Bankers' Acceptance Borrowings, And Letters of Credit Fees
Debt Instrument [Line Items]
Effective rate		1.625%
Debt instrument, minimum interest rate		0.00%
Secured Debt \| Eurocurrency And Bankers' Acceptance Borrowings, And Letters of Credit Fees \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		1.625%
Secured Debt \| Eurocurrency And Bankers' Acceptance Borrowings, And Letters of Credit Fees \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Secured Debt \| Term Loan Facility, US Term Loan B, Due 2027
Debt Instrument [Line Items]
Long-term debt	$ 900,000,000.0
Original issue discount, percent	0.125%
Senior Notes \| 5.000% Senior Notes, Due February 2028
Debt Instrument [Line Items]
Face amount					$ 1,150,000,000.0
Stated interest rate		5.00%			5.00%
Redemption price, percentage		105.00%
Long-term debt		$ 1,138,864,000		1,137,625,000
Senior Notes \| 5.000% Senior Notes, Due February 2028 \| Maximum
Debt Instrument [Line Items]
Percentage of principal amount redeemed		40.00%
Senior Notes \| 5.000% Senior Notes, Due February 2028 \| Period One
Debt Instrument [Line Items]
Redemption price, percentage		100.00%
Senior Notes \| 5.125% Senior Notes, Due January 15, 2024
Debt Instrument [Line Items]
Stated interest rate		5.125%
Redemption price, percentage		102.563%
Long-term debt		$ 0		902,351,000
Repayments of debt		900,000,000.0
Term Loan Facilities \| Term Loan Facility, US Term Loan B, Due 2027
Debt Instrument [Line Items]
Payments of financing costs		$ 6,600,000
Term Loan Facility, US Term Loan B, Due 2024 and US Term Loan B, Due 2025 \| Secured Debt \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, minimum interest rate		0.00%
Term Loan Facility, US Term Loan B, Due 2024 and US Term Loan B, Due 2025 \| Secured Debt \| London Interbank Offered Rate (LIBOR) \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Term Loan Facility, US Term Loan B, Due 2024 and US Term Loan B, Due 2025 \| Secured Debt \| Base Rate
Debt Instrument [Line Items]
Debt instrument, minimum interest rate		0.00%
Term Loan Facility, US Term Loan B, Due 2024 and US Term Loan B, Due 2025 \| Secured Debt \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Proceeds from lines of credit			$ 200,000,000.0
Revolving Credit Facility \| Secured Debt
Debt Instrument [Line Items]
Long-term debt		$ 849,895,000		$ 51,410,000
Revolving Credit Facility \| Secured Debt \| Senior Secured Revolving Credit Facility, Sublimit
Debt Instrument [Line Items]
Maximum borrowing capacity		150,000,000.0
Term Loan Facility, US Term Loan A, Due 2022 \| Secured Debt
Debt Instrument [Line Items]
Repayments of debt			633,800,000
Term Loan Facility, US Term Loan B, Due 2025 \| Secured Debt
Debt Instrument [Line Items]
Long-term debt						$ 1,785,000,000.0
5.125% Senior Notes, Due January 15, 2024 \| Senior Notes
Debt Instrument [Line Items]
Write off of deferred debt issuance cost		2,200,000
Call premium	$ 23,100,000
Interest and Other Financing Costs, Net \| Term Loan Facility, US Term Loan A, Due 2022 \| Secured Debt
Debt Instrument [Line Items]
Write off of deferred debt issuance cost			$ 5,700,000
Interest and Other Financing Costs, Net \| 5.125% Senior Notes, Due January 15, 2024 \| Senior Notes
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt		$ 20,900,000