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Business Segment Information - Assets by Business Segment (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Assets | $ 2,195.9 | $ 2,071.8
Operating segments | Medical Devices |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Assets | 1,189.6 | 1,197.2
Corporate and Other |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |
Assets | $ 1,006.3 | $ 874.6

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