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Borrowings - Schedule of Long-term Debt (Details) - USD ($) | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 27, 2020 | Sep. 27, 2019 | Sep. 28, 2017
Debt Instrument [Line Items] |  |  |
Total Long-term debt, net | $ 3,099,456,000 | $ 1,201,245,000 |
Less: Deferred Financing Fees | $ (1,807,000) | (2,535,000) |
Senior Notes, Series A |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.27% |  |
Total Long-term debt, net | $ 190,000,000 | 190,000,000 |
Senior Notes, Series B |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.42% |  |
Total Long-term debt, net | $ 180,000,000 | 180,000,000 |
Senior Notes, Series C |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.52% |  |
Total Long-term debt, net | $ 130,000,000 | 130,000,000 |
2020 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Total Long-term debt, net | 1,032,902,000 | 0 |
2017 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Total Long-term debt, net | 0 | 400,000,000 | $ 1,500,000,000
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Total Long-term debt, net | $ 1,568,361,000 | $ 303,780,000 |
LIBOR | 2020 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.72% |  |
LIBOR | 2017 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) |  | 2.05% |
Minimum | Eurodollar | 2020 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.875% |  |
Minimum | Eurodollar | 2017 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) |  | 1.00% |
Minimum | Eurodollar | New Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.875% |  |
Minimum | Base Rate | 2017 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) |  | 0.00% |
Minimum | Base Rate | Revolving Credit Facility | 2020 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.00% |  |
Minimum | Base Rate | New Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.00% |  |
Minimum | LIBOR | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.55% |  |
Maximum | Eurodollar | 2020 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) |  | 1.50% |
Maximum | Eurodollar | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 1.50% |  |
Maximum | Eurodollar | New Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 1.50% |  |
Maximum | Base Rate | 2017 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) |  | 0.50% |
Maximum | Base Rate | Revolving Credit Facility | 2020 Term Loan Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.50% |  |
Maximum | Base Rate | New Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) | 0.50% |  |
Maximum | LIBOR | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Margin added to variable rate interest rate (percentage) |  | 1.17% |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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