Leases Future Contractual Receipts (Details) $ in Millions	Dec. 31, 2019 USD ($)
Leases [Abstract]
2016, Operating Leases	$ 938.4
Capital Leases, Future Minimum Payments Receivable, Next Twelve Months	19.7
Leases Future Minimum Payments Receivable Current	958.1
2017, Operating Leases	726.4
Capital Leases, Future Minimum Payments, Receivable in Two Years	13.7
Leases Future Minimum Payments Receivable in Two Years	740.1
2018, Operating Leases	532.9
Capital Leases, Future Minimum Payments Receivable, Rolling Year Three	21.9
Leases Future Minimum Payments Receivable in Three Years	554.8
Operating Leases, Future Minimum Payments Receivable, in Four Years	399.3
Capital Leases, Future Minimum Payments, Receivable in Four Years	7.2
Leases Future Minimum Payments Receivable in Four Years	406.5
2020, Operating Leases	261.5
Capital Leases, Future Minimum Payments, Receivable in Five Years	7.7
Leases Future Minimum Payments Receivable in Five Years	269.2
Years thereafter, Operating Leases	289.9
Capital Leases, Future Minimum Payments, Receivable Thereafter	14.2
Leases Future Minimum Payments Receivable Thereafter	304.1
Total future receipts from leases	3,148.4
Total, Finance Leases	84.4
Leases Future Minimum Payments Receivable	$ 3,232.8