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Summary of Significant Accounting Policies - Additional Information (Detail) |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 27, 2023 USD ($) | Jul. 01, 2023 USD ($) | Sep. 24, 2022 USD ($) | Sep. 25, 2021 | Sep. 30, 2023 USD ($) Customer | Sep. 24, 2022 USD ($) | Sep. 25, 2021 USD ($) | Nov. 15, 2023 USD ($) | Dec. 31, 2022 USD ($) | Nov. 29, 2021 USD ($) | Jun. 17, 2021 USD ($)
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  | $ 186,900,000 |  |  |  |  |  |  |  |  |
Cash Equivalents Maturity Period |  |  |  |  | three months or less |  |  |  |  |  |
Gross Carrying Value |  |  | $ 5,518,200,000 |  | $ 5,342,000,000 | $ 5,518,200,000 |  |  |  |  |
Accumulated Amortization |  |  | 4,237,600,000 |  | 4,453,400,000 | 4,237,600,000 |  |  |  |  |
Goodwill |  |  | 3,236,500,000 |  | 3,281,300,000 | 3,236,500,000 |  |  |  |  |
Notional Amount |  |  |  |  | $ 377,900,000 |  |  |  |  |  |
Product Warranty Term |  |  |  |  | 1 year |  |  |  |  |  |
Advertising cost |  |  |  |  | $ 31,400,000 | 78,100,000 | $ 9,800,000 |  |  |  |
Notional amount |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Settlement (Payment) or Receipt |  |  |  |  |  |  |  | $ 500,000,000 |  |  |
Subsequent Event | 2021 Term Loan | Secured Term Loan |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt | $ 250,000,000 |  |  |  |  |  |  |  |  |  |
Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of customers with balance greater than specified percentage | Customer |  |  |  |  | 0 |  |  |  |  |  |
Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Carrying Value |  |  | 265,200,000 |  | $ 253,600,000 | 265,200,000 |  |  |  |  |
Accumulated Amortization |  |  | 203,300,000 |  | 212,800,000 | 203,300,000 |  |  |  |  |
Developed Technology Rights [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Carrying Value |  |  | 4,565,600,000 |  | 4,411,000,000 | 4,565,600,000 |  |  |  |  |
Accumulated Amortization |  |  | 3,458,200,000 |  | 3,649,500,000 | 3,458,200,000 |  |  |  |  |
In Process Research and Development [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Carrying Value |  |  | 33,000,000.0 |  | 25,700,000 | 33,000,000.0 |  |  |  |  |
Accumulated Amortization |  |  | 0 |  | $ 0 | $ 0 |  |  |  |  |
In Process Research and Development [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  | 10,500,000 | $ 27,700,000 |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  | 5 years |  |  |  |  |  |
Minimum | Accounts receivable [Member] | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  | 10.00% |  |  |  |  |  |
Minimum | Total revenues [Member] | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  | 10.00% | 10.00% | 10.00% |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  | 30 years |  |  |  |  |  |
Bolder Surgical |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  | $ 68,800,000 |
Bolder Surgical | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  |  |  | $ 1,400,000 |  |
Mobidiag Oy |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  | 186,900,000 |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | $ 427,700,000
Mobidiag Oy | Equipment [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  | 12,100,000 |  |  |  |  |  |  |  |  |
Mobidiag Oy | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charge |  | $ 10,700,000 |  |  |  |  |  |  |  |  |
Foreign Exchange Forward [Member] |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative contract period, or less |  |  |  |  | 1 year |  |  |  |  |  |
Interest rate caps - derivative |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax |  |  |  |  | $ 0 | $ 0 | $ 400,000 |  |  |  |

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