Leases - Balance Sheet Location of Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 29, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 135.4	$ 164.0	$ 0.0
Finance leases	17.1
Right-of-Use Asset	152.5
Present value of lease liabilities	154.0
Total operating lease liabilities	140.3	$ 166.5
Total finance lease liabilities	13.7
Operating lease assets
Lessee, Lease, Description [Line Items]
Operating lease assets	135.4
Other non-current assets
Lessee, Lease, Description [Line Items]
Finance leases	17.1
Accrued liabilities
Lessee, Lease, Description [Line Items]
Operating lease liability, current	32.9
Current indebtedness
Lessee, Lease, Description [Line Items]
Finance lease liability, current	1.9
Other noncurrent liabilities
Lessee, Lease, Description [Line Items]
Operating lease liability, noncurrent	107.4
Long-term debt, less current portion
Lessee, Lease, Description [Line Items]
Finance lease liability, noncurrent	11.8
CSCA
Lessee, Lease, Description [Line Items]
Operating lease assets	22.7
Finance leases	8.9
Total operating lease liabilities	22.9
Total finance lease liabilities	8.4
CSCI
Lessee, Lease, Description [Line Items]
Operating lease assets	42.0
Finance leases	6.1
Total operating lease liabilities	42.9
Total finance lease liabilities	3.2
RX
Lessee, Lease, Description [Line Items]
Operating lease assets	37.5
Finance leases	0.3
Total operating lease liabilities	38.9
Total finance lease liabilities	0.3
Unallocated
Lessee, Lease, Description [Line Items]
Operating lease assets	33.2
Finance leases	1.8
Total operating lease liabilities	35.6
Total finance lease liabilities	$ 1.8