Leases (Lease Maturity under ASC 840) (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Total Future Minimum Lease Payments Due, Next Twelve Months		$ 37.7	$ 34.0
Total Future Minimum Lease Payments, Due in Two Years		33.9	29.8
Total Future Minimum Lease Payments, Due in Three Years		32.8	28.7
Total Future Minimum Lease Payments, Due in Four Years		29.3	26.3
Total Future Minimum Lease Payments, Due in Five Years		27.6	22.6
Total Future Minimum Lease Payments, Due Thereafter		247.8	226.9
Total Future Minimum Lease Payments Due		$ 409.1	368.3
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		23.0
Capital Leases, Future Minimum Payments Due in Two Years	[1]		22.5
Capital Leases, Future Minimum Payments Due in Three Years	[1]		22.6
Capital Leases, Future Minimum Payments Due in Four Years	[1]		22.1
Capital Leases, Future Minimum Payments Due in Five Years	[1]		19.8
Capital Leases, Future Minimum Payments Due Thereafter	[1]		212.4
Capital Leases, Future Minimum Payments Due	[1]		322.4
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[2]		11.0
Operating Leases, Future Minimum Payments, Due in Two Years	[2]		7.3
Operating Leases, Future Minimum Payments, Due in Three Years	[2]		6.1
Operating Leases, Future Minimum Payments, Due in Four Years	[2]		4.2
Operating Leases, Future Minimum Payments, Due in Five Years	[2]		2.8
Operating Leases, Future Minimum Payments, Due Thereafter	[2]		14.5
Operating Leases, Future Minimum Payments Due	[2]		$ 45.9

[1] Capital lease payments shown above are inclusive of interest totaling $114.6 million.

[2] Operating lease balances do not include obligations for possible fleet vehicle lease renewals beyond the initial lease term. While we have the ability to renew these leases beyond the initial term, we are not reasonably certain to do so. Expected payments are $26.7 million in 2019, $22.4 million in 2020, $16.6 million in 2021, $12.3 million in 2022, $9.3 million in 2023 and $8.8 million thereafter.