Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Lease Assets and Liabilities [Line Items]
Financing lease right of use assets - third party	$ 84.9	$ 24.2
Lease, Right-of-Use Asset	1,046.3	980.6
Operating Lease, Liability, Current	160.0
Current finance lease liabilities	12.7	6.5
Operating Lease, Liability, Noncurrent	799.8
Long-term financing lease liabilities - third party	73.2	18.4
Lease Liability	1,045.7	980.1
Third Party Lease [Member]
Lease Assets and Liabilities [Line Items]
Operating Lease, Right-of-Use Asset	330.2	306.1
Operating Lease, Liability, Current	79.4	72.0
Operating Lease, Liability, Noncurrent	249.3	232.9
Lease with Affiliate [Member]
Lease Assets and Liabilities [Line Items]
Operating Lease, Right-of-Use Asset	631.2	650.3
Operating Lease, Liability, Current	80.6	79.2
Operating Lease, Liability, Noncurrent	$ 550.5	$ 571.1