Discontinued Operations - Assets and Liabilities (Details) - USD ($) $ in Millions	Jul. 03, 2021	Dec. 31, 2020	Jun. 27, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 18.5	$ 10.0	$ 18.7	$ 9.8
Current assets held for sale	2,089.3	666.9
Non-current assets held for sale	0.0	1,364.0
Current liabilities held for sale	468.3	419.6
Non-current liabilities held for sale	0.0	108.3
Discontinued Operations, Disposed of by Sale | RX
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	9.3	10.0
Accounts receivable, net of allowance for credit losses of $1.0 and $1.1, respectively	496.4	460.7
Inventories	143.4	140.8
Prepaid expenses and other current assets	21.4	55.4
Current assets held for sale		666.9
Property, plant and equipment, net	133.3	131.4
Operating lease assets	30.0	31.3
Goodwill and indefinite-lived intangible assets	680.0	681.2
Definite-lived intangible assets, net	532.9	492.8
Deferred income taxes	4.2	3.6
Other non-current assets	22.6	23.7
Non-current assets held for sale		1,364.0
Total assets held for sale	2,073.5	2,030.9
Accounts payable	91.6	92.2
Payroll and related taxes	14.1	22.3
Accrued customer programs	235.6	237.4
Other accrued liabilities	27.4	67.2
Current indebtedness	0.5	0.5
Current liabilities held for sale		419.6
Long-term debt, less current portion	0.4	0.7
Deferred income taxes	3.2	3.1
Other non-current liabilities	64.6	104.5
Non-current liabilities held for sale		108.3
Total liabilities held for sale	437.5	527.9
Allowance for credit losses	1.0	1.1
Accrued income taxes	$ 0.1	$ 0.0