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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. 25, 2021 USD ($)
Goodwill [Roll Forward] |
Balance at September 26, 2020 | $ 2,657.9
Foreign currency and other adjustments | (5.7)
Balance at September 25, 2021 | 3,281.6
Diagnostics |
Goodwill [Roll Forward] |
Balance at September 26, 2020 | 821.6
Foreign currency and other adjustments | (7.8)
Balance at September 25, 2021 | 1,410.8
Breast Health |
Goodwill [Roll Forward] |
Balance at September 26, 2020 | 764.8
Foreign currency and other adjustments | (0.1)
Balance at September 25, 2021 | 797.1
Gyn Surgical [Member] |
Goodwill [Roll Forward] |
Balance at September 26, 2020 | 1,063.4
Foreign currency and other adjustments | 2.2
Balance at September 25, 2021 | 1,065.6
Skeletal Health |
Goodwill [Roll Forward] |
Balance at September 26, 2020 | 8.1
Foreign currency and other adjustments | 0.0
Balance at September 25, 2021 | 8.1
Mobidiag Oy |
Goodwill [Roll Forward] |
Tax adjustment | 432.6
Mobidiag Oy | Diagnostics |
Goodwill [Roll Forward] |
Tax adjustment | 432.6
Diagenode |
Goodwill [Roll Forward] |
Tax adjustment | 83.5
Diagenode | Diagnostics |
Goodwill [Roll Forward] |
Tax adjustment | 83.5
Biotheranostics |
Goodwill [Roll Forward] |
Tax adjustment | 80.9
Biotheranostics | Diagnostics |
Goodwill [Roll Forward] |
Tax adjustment | 80.9
Somatex |
Goodwill [Roll Forward] |
Tax adjustment | 32.4
Somatex | Breast Health |
Goodwill [Roll Forward] |
Tax adjustment | $ 32.4

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