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Summary of Significant Accounting Policies - Rollforward of Goodwill Activity by Reportable Segments (Detail) $ in Millions | 12 Months Ended
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Sep. 26, 2020 USD ($)
Goodwill [Roll Forward] |
Balance at September 28, 2019 | $ 2,563.7
Foreign currency and other adjustments | 5.3
Balance at September 26, 2020 | 2,657.9
Diagnostics |
Goodwill [Roll Forward] |
Balance at September 28, 2019 | 819.2
Foreign currency and other adjustments | 2.4
Balance at September 26, 2020 | 821.6
Breast Health |
Goodwill [Roll Forward] |
Balance at September 28, 2019 | 722.2
Foreign currency and other adjustments | 2.1
Balance at September 26, 2020 | 764.8
Gyn Surgical [Member] |
Goodwill [Roll Forward] |
Balance at September 28, 2019 | 1,014.2
Foreign currency and other adjustments | 0.8
Balance at September 26, 2020 | 1,063.4
Skeletal Health |
Goodwill [Roll Forward] |
Balance at September 28, 2019 | 8.1
Foreign currency and other adjustments | 0.0
Balance at September 26, 2020 | 8.1
SuperSonic Imagine |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 34.3
SuperSonic Imagine | Diagnostics |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
SuperSonic Imagine | Breast Health |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 34.3
SuperSonic Imagine | Gyn Surgical [Member] |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
SuperSonic Imagine | Skeletal Health |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
Health Beacons |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 6.2
Balance at September 26, 2020 | 6.2
Health Beacons | Diagnostics |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
Health Beacons | Breast Health |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 6.2
Health Beacons | Gyn Surgical [Member] |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
Health Beacons | Skeletal Health |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
Acessa Health [Member] |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 48.4
Acessa Health [Member] | Diagnostics |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
Acessa Health [Member] | Breast Health |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 0.0
Acessa Health [Member] | Gyn Surgical [Member] |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | 48.4
Acessa Health [Member] | Skeletal Health |
Goodwill [Roll Forward] |
SuperSonic Imagine acquisition | $ 0.0

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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