Leases - Balance Sheet Location of Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 27, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 136.7	$ 129.9
Finance leases	27.7	27.6
Right-of-Use Asset	164.4	157.5
Operating lease liability, current	32.0	32.0
Finance lease liability, current	5.8	3.4
Operating lease liability, noncurrent	109.5	101.7
Finance lease liability, noncurrent	19.0	21.1
Present value of lease liabilities	166.3	158.2
Total operating lease liabilities	141.5	133.7
Total finance lease liabilities	$ 24.8	24.5
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherNoncurrentAssets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherCurrentLiabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:DebtCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongtermDebtNoncurrent
CSCA
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 22.0	22.4
Finance leases	16.2	16.8
Total operating lease liabilities	22.2	22.8
Total finance lease liabilities	16.3	16.6
CSCI
Lessee, Lease, Description [Line Items]
Operating lease assets	34.7	41.6
Finance leases	5.6	5.8
Total operating lease liabilities	35.4	42.4
Total finance lease liabilities	2.5	2.9
RX
Lessee, Lease, Description [Line Items]
Operating lease assets	32.6	35.1
Finance leases	0.7	0.8
Total operating lease liabilities	34.0	36.3
Total finance lease liabilities	0.7	0.8
Unallocated
Lessee, Lease, Description [Line Items]
Operating lease assets	47.4	30.8
Finance leases	5.2	4.2
Total operating lease liabilities	49.9	32.2
Total finance lease liabilities	$ 5.3	$ 4.2