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Leases - Balance Sheet Effect (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Operating lease assets $ 294.1 $ 304.3
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Property, plant and equipment, net Property, plant and equipment, net
Finance lease assets $ 59.4 $ 61.2
Total leased assets $ 353.5 $ 365.5
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesCurrent us-gaap:AccruedLiabilitiesCurrent
Operating lease obligations $ 61.2 $ 61.0
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Current portion of long-term debt Current portion of long-term debt
Finance lease obligations $ 11.4 $ 11.4
Long-term operating lease obligations $ 266.2 $ 275.1
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Long-term debt, net Long-term debt, net
Finance lease obligations $ 58.3 $ 60.0
Present value of lease obligations $ 397.1 $ 407.5