Lessor accounting (Details 4) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating Lease, Lease Income	$ 11.2	$ 37.7
Lessor, Operating Lease, Payments to be Received, Next Twelve Months	$ 10.0	$ 10.0