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Borrowings and Credit Arrangements - Additional Information (Detail) - USD ($) |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |
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Sep. 28, 2025 | Oct. 27, 2023 | Aug. 22, 2022 | Sep. 27, 2021 | Oct. 15, 2020 | Sep. 28, 2020 | Jan. 19, 2018 | Dec. 25, 2021 | Dec. 26, 2020 | Sep. 27, 2025 | Sep. 27, 2024 | Sep. 30, 2023 | Sep. 24, 2022 | Sep. 25, 2021 | Dec. 17, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt extinguishment loss |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 700,000 | $ 21,600,000 |
Current debt obligations, net of debt discount |  |  |  |  |  |  |  |  |  |  |  | 287,000,000.0 | 15,000,000.0 |  |
Long term debt obligations. excluding convertible notes |  |  |  |  |  |  |  |  |  |  |  | 2,531,200,000 | 2,808,400,000 |  |
Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |
Secured Term Loan | 2018 Amended Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000,000
Secured Term Loan | 2021 Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  |  |  |  |  | 6.42% |  |  |
Long term debt obligations. excluding convertible notes |  |  |  |  |  |  |  |  |  |  |  | $ 1,490,000,000 |  |  |
Secured Term Loan | 2021 Term Loan | Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |
Derivative, Fixed Interest Rate |  |  |  |  |  |  |  |  |  |  |  | 1.23% |  |  |
Interest Expense, Long-Term Debt, Increase (Decrease) |  |  |  |  |  |  |  |  |  |  |  | $ 35,400,000 | 4,900,000 | $ 9,000,000 |
Secured Term Loan | 2021 Term Loan | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Term Loan | 2021 Term Loan | Eurocurrency Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal Per Quarter |  |  |  | 1,335,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Commitment Fee, Percentage |  |  |  |  |  |  |  |  |  |  |  | 0.15% |  |  |
Secured Term Loan | 2021 Term Loan | Eurocurrency Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal Per Quarter |  |  |  | 9,375,000 |  |  |  |  |  |  |  |  |  |  |
Secured Term Loan | 2021 Term Loan | Eurocurrency Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal Per Quarter |  |  |  | 18,750,000 |  |  |  |  |  |  |  |  |  |  |
Secured Term Loan | 2021 Term Loan | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (percent) |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |
Revolver | 2021 Revolver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit borrowing capacity |  |  |  | $ 2,000,000,000 |  |  |  |  |  |  |  |  |  |  |
Revolver | 2021 Revolver | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread On Variable Rate, Eurocurrency Convert |  |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread On Variable Rate, LIBOR Convert |  |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | 2018 Amended Revolver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000,000
Senior Notes | 2029 Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  | 3.25% |  |  |  |  |  | 3.25% |  |  |
Redemption price, percentage |  |  |  |  |  | 100.00% |  |  |  |  |  | 101.00% |  |  |
Senior notes principal amount |  |  |  |  |  | $ 950,000,000 |  |  |  |  |  |  |  |  |
Senior Notes | 2029 Senior Notes | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage | 100.00% |  |  |  |  |  |  |  |  | 100.813% | 101.625% |  |  |  |
Senior Notes | 2028 Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  |  | 4.625% |  |  |  |  | 4.625% |  |  |
Proceeds from issuance of senior long-term debt |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |
Offering price, percent of face value |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Percentage of redemption price, third period |  |  |  |  |  |  |  |  |  |  |  | 102.312% |  |  |
Percentage of redemption price, fourth period |  |  |  |  |  |  |  |  |  |  |  | 101.541% |  |  |
Percentage of redemption price, fifth period |  |  |  |  |  |  |  |  |  |  |  | 100.77% |  |  |
Percentage redemption price, sixth period |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Percentage price of principal amount for repurchase of senior notes |  |  |  |  |  |  |  |  |  |  |  | 101.00% |  |  |
Senior Notes | 2025 Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  | $ 950,000,000 |  |  |  |  |  |  |  |  |  |
Debt extinguishment loss |  |  |  |  |  |  |  |  | $ (21,600,000) |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  |  |  |  |  |  |  | 4.375% |  |  |
Interest expense |  |  |  |  |  |  |  |  | 5,800,000 |  |  |  |  |  |
Extinguishment of Debt, Amount |  |  |  |  | 970,800,000 |  |  |  |  |  |  |  |  |  |
Debt Redemption, Premium Paid |  |  |  |  | $ 20,800,000 |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  |  |  |  |  |  | 7,900,000 |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  |  |  |  |  |  | $ 6,400,000 |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current debt obligations, net of debt discount |  |  |  |  |  |  |  |  |  |  |  | $ 287,000,000.0 | 15,000,000.0 |  |
Long term debt obligations. excluding convertible notes |  |  |  |  |  |  |  |  |  |  |  | $ 1,195,600,000 | $ 1,475,700,000 |  |
Term Loan | 2021 Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt extinguishment loss |  |  |  |  |  |  |  | $ 700,000 |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  |  |  |  |  | $ 7,000,000 |  |  |  |  |  |  |

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