Leases Cash paid for amounts included in the measurement of lease liabilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) tankContainer	Dec. 31, 2021 USD ($) tankContainer
Lessee, Lease Terms and Discount Rates [Abstract]
Operating Lease, Payments	$ 41.2	$ 42.4	$ 40.5
Lease, Payments	0.0	1.5	77.2
Lease, Payments	41.2	43.9	117.7
Non-cash financing lease transactions	$ 0.0	$ 0.0	$ 45.1
Number of railcars received | tankContainer		21	2,329