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Business Combination - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
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Jun. 17, 2021 USD ($) project | Mar. 01, 2021 USD ($) | Feb. 22, 2021 USD ($) | Jan. 04, 2021 USD ($) | Sep. 28, 2020 USD ($) | Aug. 23, 2020 USD ($) | Feb. 03, 2020 USD ($) | Dec. 30, 2019 USD ($) | Nov. 21, 2019 USD ($) shares | Aug. 01, 2019 USD ($) | Nov. 30, 2019 USD ($) | Sep. 30, 2019 $ / shares | Jun. 26, 2021 USD ($) shares | Jun. 26, 2021 USD ($) | Jun. 27, 2020 | Sep. 26, 2020 USD ($) shares | Nov. 20, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, net |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,800.8 | $ 1,800.8 |  | $ 1,307.5 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,264.2 | 3,264.2 |  | $ 2,657.9 |
Discount rate percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.120 |  |
Developed Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Trade Names |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred | $ 729.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
In process research and development | $ 103.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development in process, number of projects | project | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development in process, completion period | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology | $ 284.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships | 26.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names | 21.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 406.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, fair value (percentage) | 14.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, fair value (percentage) | 16.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Customer Relationships | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Customer Relationships | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life | 11 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Developed Technology | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Developed Technology | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Trade Names | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mobidiag Oy | Trade Names | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Biotheranostics |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  | $ 231.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, fair value (percentage) |  |  | 18.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology |  |  | $ 160.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  |  | 2.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 84.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diagenode |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  | $ 155.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology |  | $ 69.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | 9.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 79.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diagenode | Customer Relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, fair value (percentage) |  | 13.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diagenode | Developed Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, fair value (percentage) |  | 14.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Somatex Medical Technologies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | $ 62.9 |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology |  |  |  | 38.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  |  |  | 1.2 |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  |  |  | 0.9 |  |  |  |  |  |  |  |  |  |  |  |  |
Net acquired tangible assets and liabilities |  |  |  | 9.6 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 32.4 |  |  |  |  |  |  |  |  |  |  |  |  |
NXC Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  | $ 5.6 |  |  |  |  |  |  |  |  |  |  |  |
NXC Imaging | Customer Relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Acessa Health |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  | $ 161.3 |  |  |  |  |  |  |  |  |  |  |
Intangible assets, fair value (percentage) |  |  |  |  |  | 18.00% |  |  |  |  |  |  |  |  |  |  |
Developed technology |  |  |  |  |  | $ 127.0 |  |  |  |  |  |  |  |  |  |  |
Trade names |  |  |  |  |  | 1.2 |  |  |  |  |  |  |  |  |  |  |
Purchase price withheld |  |  |  |  |  | $ 81.8 |  |  |  |  |  |  |  |  |  |  |
Annual incremental revenue growth period |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |
Change in contingent consideration |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (10.1) |  |  |
Goodwill |  |  |  |  |  | $ 48.4 |  |  |  |  |  |  |  |  |  |  |
Acessa Health | Contingent Holdback |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price withheld |  |  |  |  |  | $ 3.0 |  |  |  |  |  |  |  |  |  |  |
Health Beacons |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  | $ 19.7 |  |  |  |  |  |  |  |  |  |
Holdback |  |  |  |  |  |  | 2.3 |  |  |  |  |  |  |  |  |  |
Intangible assets, net |  |  |  |  |  |  | 10.7 |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | 6.2 |  |  |  |  |  |  |  |  |  |
Remainder of purchase price |  |  |  |  |  |  | $ 2.8 |  |  |  |  |  |  |  |  |  |
Alpha Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  | $ 18.0 |  |  |  |  |  |  |  |  |
Purchase price withheld |  |  |  |  |  |  |  | 0.9 |  |  |  |  |  |  |  |  |
Holdback |  |  |  |  |  |  |  | $ 1.0 |  |  |  |  |  |  |  |  |
Alpha Imaging | Customer Relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
SuperSonic Imagine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  | $ 69.3 | $ 18.2 |  |  |  |  |  |  |
Developed technology |  |  |  |  |  |  |  |  | 38.3 |  |  |  |  |  |  |  |
Customer relationships |  |  |  |  |  |  |  |  | 4.0 |  |  |  |  |  |  |  |
Trade names |  |  |  |  |  |  |  |  | 3.0 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 34.3 |  |  |  |  |  |  |  |
Percentage of outstanding shares acquired |  |  |  |  |  |  |  |  |  | 46.00% |  |  |  |  |  |  | 50.00%
Cash tender offer price (per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 1.50 |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  | 78.00% |  |  |  |  |  |  |  |
Equity interest in acquiree, percentage |  |  |  |  |  |  |  |  |  | 46.00% |  |  | 100.00% | 100.00% |  |  |
Equity interest in acquiree, remeasurement gain |  |  |  |  |  |  |  |  | $ 3.2 |  |  |  |  |  |  |  |
Consideration related to equity method investment |  |  |  |  |  |  |  |  | 17.9 |  |  |  |  |  |  |  |
Consideration related to newly acquired shares |  |  |  |  |  |  |  |  |  |  | $ 12.6 |  |  |  |  |  |
Consideration, portion related to loan repayment |  |  |  |  |  |  |  |  | 30.2 |  |  |  |  |  |  |  |
Consideration related to fair value of noncontrolling interest |  |  |  |  |  |  |  |  | $ 8.6 |  |  |  |  |  |  |  |
Additional outstanding shares purchased (in shares) | shares |  |  |  |  |  |  |  |  | 7.6 |  |  |  | 4.8 |  |  | 1.1 |
Additional outstanding shares purchased, amount |  |  |  |  |  |  |  |  | $ 12.6 |  |  |  | $ 8.5 |  |  | $ 1.8 |
SuperSonic Imagine | Customer Relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  |  |  |  |  | 9 years |  |  |  |  |  |  |  |
SuperSonic Imagine | Developed Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  |  |  |  |  | 9 years |  |  |  |  |  |  |  |
SuperSonic Imagine | Trade Names |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets useful life |  |  |  |  |  |  |  |  | 8 years 7 months 6 days |  |  |  |  |  |  |  |

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