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Business Combination - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 07, 2017 | Mar. 22, 2017 | Jul. 01, 2017 | Jul. 01, 2017 | Jun. 25, 2016 | Jul. 01, 2017 | Jun. 25, 2016 | Jun. 22, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenues |  |  |  | $ 806.1 | $ 717.4 | $ 2,255.9 | $ 2,105.8 |
Operating Income (Loss) |  |  |  | 115.0 | $ 139.4 | 1,260.9 | $ 401.6 |
Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Outstanding noncontrolling shares |  | 1.2 |  |  |  |  |  |
Purchase price (in dollars per share) |  | $ 66.00 |  |  |  |  |  |
Cash paid |  | $ 1,578.6 |  |  |  |  |  |
Noncontrolling interest |  | 79.2 |  |  |  |  |  |
Transaction costs |  | 18.5 |  |  |  |  |  |
Revenues |  |  | $ 126.0 |  |  |  |  |
Operating Income (Loss) |  |  | 51.4 |  |  |  |  |
Purchase price withheld |  |  | $ 1.5 | $ 1.5 |  | $ 1.5 |  |
Medicor Medical Supply |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash paid | $ 19.0 |  |  |  |  |  |  |
Intangible Assets |  |  |  |  |  |  |  | $ 5.4
Purchase price withheld |  |  |  |  |  |  |  | $ 1.9
Weighted average period | 7 years 8 months 12 days |  |  |  |  |  |  |
In-process research and development | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible Assets |  | 107.0 |  |  |  |  |  |
Estimated costs to complete |  | 18.0 |  |  |  |  |  |
Developed technology | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible Assets |  | $ 736.0 |  |  |  |  |  |
Weighted average period |  | 11 years 9 months 18 days |  |  |  |  |  |
Distribution agreement | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible Assets |  | $ 42.0 |  |  |  |  |  |
Weighted average period |  | 8 years |  |  |  |  |  |
Customer relationships | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible Assets |  | $ 35.0 |  |  |  |  |  |
Weighted average period |  | 7 years 8 months 12 days |  |  |  |  |  |
Trade names | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Intangible Assets |  | $ 74.0 |  |  |  |  |  |
Weighted average period |  | 8 years 10 months 24 days |  |  |  |  |  |
Minimum | Other Intangible Assets | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Discount rate (as a percent) |  | 11.00% |  |  |  |  |  |
Minimum | In-process research and development | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Discount rate (as a percent) |  | 14.00% |  |  |  |  |  |
Maximum | Other Intangible Assets | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Discount rate (as a percent) |  | 12.00% |  |  |  |  |  |
Maximum | In-process research and development | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Discount rate (as a percent) |  | 22.00% |  |  |  |  |  |
Cynosure Shareholders | Cynosure |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash paid |  | $ 1,580.0 |  |  |  |  |  |

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