Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Lease Assets and Liabilities [Line Items]
Financing lease right of use assets - third party	$ 81.3	$ 24.2
Lease, Right-of-Use Asset	1,100.4	980.6
Operating Lease, Liability, Current	230.7
Current finance lease liabilities	12.8	6.5
Operating Lease, Liability, Noncurrent	786.6
Long-term financing lease liabilities - third party	70.0	18.4
Lease Liability	1,100.1	980.1
Third Party Lease [Member]
Lease Assets and Liabilities [Line Items]
Lease right of use assets - affiliate	407.4	306.1
Operating Lease, Liability, Current	148.5	72.0
Operating Lease, Liability, Noncurrent	257.2	232.9
Lease with Affiliate [Member]
Lease Assets and Liabilities [Line Items]
Lease right of use assets - affiliate	611.7	650.3
Operating Lease, Liability, Current	82.2	79.2
Operating Lease, Liability, Noncurrent	$ 529.4	$ 571.1