Leases - Balance Sheet Location of Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 166.9	$ 154.7
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent	Other Assets, Noncurrent
Finance leases	$ 27.9	$ 29.8
Right-of-use assets	$ 194.8	$ 184.5
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Operating lease liability, current	$ 26.0	$ 28.3
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current indebtedness	Current indebtedness
Finance lease liability, current	$ 4.9	$ 6.7
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities	Other non-current liabilities
Operating lease liability, noncurrent	$ 147.3	$ 132.5
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total long-term debt, less current portion	Total long-term debt, less current portion
Finance lease liability, noncurrent	$ 20.9	$ 20.2
Present value of lease liabilities	199.1	187.7
Total operating lease liabilities	173.3	160.8
Total finance lease liabilities	25.8	26.9
CSCA
Lessee, Lease, Description [Line Items]
Operating lease assets	98.2	75.9
Finance leases	15.3	16.7
Total operating lease liabilities	99.7	75.8
Total finance lease liabilities	16.0	17.0
CSCI
Lessee, Lease, Description [Line Items]
Operating lease assets	30.7	34.4
Finance leases	7.9	5.9
Total operating lease liabilities	31.8	35.2
Total finance lease liabilities	5.0	2.5
Unallocated
Lessee, Lease, Description [Line Items]
Operating lease assets	38.0	44.4
Finance leases	4.7	7.2
Total operating lease liabilities	41.8	49.8
Total finance lease liabilities	$ 4.8	$ 7.4