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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 27, 2025

Accounting Policies [Abstract]

Supplemental Cash Flow Statement Information

Supplemental Cash Flow Statement Information

						Years Ended
						September 27, 2025						September 28, 2024						September 30, 2023
Cash paid during the period for income taxes						$	224.3					$	137.9					$	296.1
Cash paid during the period for interest						$	112.9					$	117.1					$	105.4
Non-Cash Financing Activities:
Fair value of contingent consideration at acquisition						$	—					$	—					$	1.1

Cash paid for income taxes presented above is net of tax refunds of $7.0 million, $19.6 million and $39.3 million for fiscal years 2025, 2024 and 2023, respectively. The fiscal 2025, 2024 and 2023 refunds received primarily related to tax filings and over-payments made in the ordinary course of business.

Schedule of Inventories

Inventories consisted of the following:

						September 27, 2025						September 28, 2024
Raw materials						$	247.8					$	251.4
Work-in-process						68.4						62.0
Finished goods						363.2						366.4
						$	679.4					$	679.8

Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following:

			Estimated Useful Life						September 27, 2025						September 28, 2024
Equipment			3–10 years						$	383.8					$	378.1
Equipment under customer usage agreements			3–8 years						586.8						523.1
Buildings and improvements			20–35 years						256.1						247.1
Leasehold improvements			Shorter of the Original Lease Term or Estimated Useful Life						49.1						44.0
Land									40.9						40.8
Furniture and fixtures			5–7 years						26.5						24.6
Finance lease right-of-use asset									9.2						8.8
									1,352.4						1,266.5
Less - accumulated depreciation and amortization									(792.8)						(728.7)
									$	559.6					$	537.8

Schedule of Intangible Assets

Intangible assets consisted of the following:

						September 27, 2025												September 28, 2024
Description						Gross Carrying Value						Accumulated Amortization						Gross Carrying Value						Accumulated Amortization
Acquired intangible assets:
Developed technology						$	4,540.2					$	4,015.8					$	4,567.0					$	3,834.0
In-process research and development						3.1						—						25.1						—
Customer relationships						593.7						578.1						609.7						569.8
Trade names						262.8						229.2						260.3						224.5
Total acquired intangible assets						$	5,399.8					$	4,823.1					$	5,462.1					$	4,628.3
Internal-use software						20.6						15.4						25.7						20.5
Capitalized software embedded in products						33.5						26.3						30.2						24.6
Total intangible assets						$	5,453.9					$	4,864.8					$	5,518.0					$	4,673.4

Schedule of Estimated Amortization Expense

The estimated amortization expense at September 27, 2025 for each of the five succeeding fiscal years was as follows:

Fiscal 2026			$	149.9
Fiscal 2027			$	62.8
Fiscal 2028			$	59.5
Fiscal 2029			$	53.3
Fiscal 2030			$	51.0

Rollforward of Goodwill Activity by Reportable Segment

A rollforward of goodwill activity by reportable segment from September 28, 2024 to September 27, 2025 is as follows: 

			Diagnostics						Breast Health						GYN Surgical						Skeletal Health						Total
Balance at September 28, 2024			$	1,365.8					$	934.6					$	1,134.7					$	8.0					$	3,443.1
Gynesonics acquisition			—						—						191.0						—						191.0
Foreign currency and other adjustments			2.9						3.8						(0.2)						—						6.5
Balance at September 27, 2025			$	1,368.7					$	938.4					$	1,325.5					$	8.0					$	3,640.6

Schedule of Other Assets

Other assets consisted of the following:

						September 27, 2025						September 28, 2024
Other Assets
Tax receivable						$	37.4					$	37.5
Operating lease right of use assets						94.1						92.2
Life insurance contracts						78.6						71.0
Deferred tax assets						239.8						128.8
Strategic investments						78.5						54.3
Other						29.1						27.0
						$	557.5					$	410.8

Schedule of Accumulated Other Comprehensive Income (Loss) Related to Derivatives

Realized and unrealized gains and losses from these contracts, which were the only derivative contracts not designated for hedge accounting, for the years ended September 27, 2025, September 28, 2024, and September 30, 2023 were as follows:

			Years Ended
			September 27, 2025						September 28, 2024						September 30, 2023
Amount of realized gain (loss) recognized in income
Forward foreign currency contracts			$	2.5					$	3.9					$	1.3
Foreign currency option contracts			—						—						(4.0)
			$	2.5					$	3.9					$	(2.7)
Amount of unrealized gain (loss) recognized in income
Forward foreign currency contracts			$	8.1					$	(20.9)					$	(7.5)
Foreign currency option contracts			(0.8)						0.8						(5.5)
			$	7.3					$	(20.1)					$	(13.0)
Amount of gain (loss) recognized in income
Total			$	9.8					$	(16.2)					$	(15.7)

Schedule of Derivative Instruments on the Consolidated Balance Sheets

The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the balance sheet as of September 27, 2025:

			Balance Sheet Location						September 27, 2025						September 28, 2024
Assets:
Derivative instrument designated as a cash flow hedge:
Interest rate swap contracts			Prepaid expenses and other current assets						$	3.2					$	3.1
									$	3.2					$	3.1
Derivatives not designated as hedging instruments:
Forward foreign currency contracts			Prepaid expenses and other current assets						$	1.6					$	—
Foreign currency option contracts			Prepaid expenses and other current assets						—						0.8
									$	1.6					$	0.8
Liabilities:
Derivative instruments designated as a cash flow hedge:
Interest rate swap contracts			Other long-term liabilities						$	—					$	0.2
Total									$	—					$	0.2
Derivatives not designated as hedging instruments:
Forward foreign currency contracts			Accrued expenses						$	6.1					$	12.6

Schedule of Unrealized Loss Recognized in AOCI

The following table presents the unrealized gain (loss) recognized in AOCI related to interest rate swaps for the following reporting periods:

			Years Ended
			September 27, 2025						September 28, 2024						September 30, 2023
Amount of loss recognized in other comprehensive income (loss), net of taxes:
Interest rate swap			$	(0.1)					$	(18.3)					$	(9.2)
Total			$	(0.1)					$	(18.3)					$	(9.2)

Accounts Receivable Reserve Activity

The following is a rollforward of the allowance for credit losses for fiscal 2025, 2024 and 2023:

						Balance at Beginning of Period						Charged to Costs and Expenses												Write- offs and Payments						Balance at End of Period
Period Ended:
September 27, 2025						$	41.4					$	0.3											$	(3.5)					$	38.2
September 28, 2024						$	38.5					$	5.7											$	(2.8)					$	41.4
September 30, 2023						$	37.7					$	3.7											$	(2.9)					$	38.5

Schedule of Reconciliation of Basic and Diluted Share Amounts

A reconciliation of basic and diluted share amounts for fiscal 2025, 2024, and 2023 was as follows:

						September 27, 2025						September 28, 2024						September 30, 2023
Basic weighted average common shares outstanding						226,156						235,723						246,772
Weighted average common stock equivalents from assumed exercise of stock options and restricted stock units						1,417						1,830						2,059
Diluted weighted average common shares outstanding						227,573						237,553						248,831
Weighted-average anti-dilutive shares related to:
Outstanding stock options and restricted stock units						2,150						1,171						981

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