XML 84 R60.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Operating lease liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Leases    
Current operating lease liabilities $ 94.0  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued Liabilities, Current  
Long-term operating lease liabilities $ 2,350.3 $ 2,301.2
Total operating lease liabilities $ 2,444.3  
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesCurrent us-gaap:OperatingLeaseLiabilityNoncurrent