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Leases - Right-of-Use Assets and Lease Obligations (Details) - USD ($)
$ in Millions
Jul. 04, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssetsNoncurrent  
Right-of-use assets under operating leases:    
Other long-term assets $ 537.2 $ 527.0
Lease obligations under operating leases:    
Accrued liabilities 113.9 113.9
Other long-term liabilities 434.0 422.4
Lease obligations under operating leases $ 547.9 $ 536.3
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesCurrent  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent