Leases - Assets and Liabilities Lessee (Details) $ in Millions	Jun. 30, 2020 USD ($)
ROU assets:
Operating lease ROU assets	$ 397.4
Finance lease ROU assets	52.8
Total ROU assets	450.2
Lease liabilities:
Operating lease liabilities — current	83.2
Operating lease liabilities — noncurrent	320.8
Finance lease liabilities — current	5.6
Finance lease liabilities — noncurrent	41.0
Total lease liabilities	$ 450.6