Discontinued Operations and Divestitures Discontinued Operations (Assets and Liabilities Held-for-sale) (Details) - Specialty Generics Disposal Group - USD ($) $ in Millions	Mar. 30, 2018	Dec. 29, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable, held for sale	$ 183.3	$ 170.4
Other current assets and non-current assets, held for sale	83.4	84.5
Total assets classified as held for sale in the balance sheet	1,143.0	1,134.2
Accounts payable, held for sale	40.6	36.0
Other current and non-current liabilities, held for sale	119.1	126.6
Total liabilities classified as held for sale in the balance sheet	159.7	162.6
Disposal Group, Including Discontinued Operation, Inventory	212.8	211.7
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	551.2	553.6
Disposal Group, Including Discontinued Operation, Intangible Assets	$ 112.3	$ 114.0