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Goodwill and Other Intangible Assets (Goodwill by Segment) (Details) - USD ($) $ in Millions | Oct. 02, 2020 | Dec. 31, 2019
--- | --- | ---
Goodwill [Line Items] |  |
Total goodwill | $ 34,269.7 | $ 22,712.5
Operating segments | Life Sciences |  |
Goodwill [Line Items] |  |
Total goodwill | 24,866.5 | 13,471.8
Operating segments | Diagnostics |  |
Goodwill [Line Items] |  |
Total goodwill | 6,951.6 | 6,901.2
Operating segments | Environmental & Applied Solutions |  |
Goodwill [Line Items] |  |
Total goodwill | $ 2,451.6 | $ 2,339.5

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