v3.19.3.a.u2
LEASES - Lease assets and liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
LEASES    
Operating lease right-of-use assets, net $ 4,796.0  
Finance lease right-of-use assets $ 73.4  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Property, Plant and Equipment, Net  
Total leased assets $ 4,869.4  
Operating Lease, Liability, Current 585.8  
Finance Lease, Liability, Current 10.3  
Operating Lease, Liability, Noncurrent 4,913.8  
Finance Lease, Liability, Noncurrent 89.6 $ 493.2
Total lease liabilities $ 5,599.5