Goodwill and Identifiable Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Identifiable intangible assets
Gross Carrying Amount	$ 452.5	$ 452.5	$ 429.7
Accumulated Amortization	213.1	213.1	189.1
Net	239.4	239.4	240.7
Total intangible assets, Gross Carrying Amount	492.9	492.9	471.4
Total intangible assets, Net	279.7	279.7	282.3
Goodwill and other impairments	91.9	91.9	0.0	$ 0.0
Intangible amortization expense		41.9	39.7	$ 30.4
Trademark/trade name rights
Identifiable intangible assets
Indefinite lived intangible assets	40.3	40.3	41.7
Customer relationships
Identifiable intangible assets
Gross Carrying Amount	373.8	373.8	353.8
Accumulated Amortization	171.4	171.4	155.5
Net	202.4	202.4	198.3
Supplier agreements
Identifiable intangible assets
Gross Carrying Amount	38.7	38.7	38.7
Accumulated Amortization	15.4	15.4	13.3
Net	23.4	23.4	25.4
Others
Identifiable intangible assets
Gross Carrying Amount	40.0	40.0	37.2
Accumulated Amortization	26.3	26.3	20.2
Net	$ 13.7	13.7	$ 17.0
Marine segment
Identifiable intangible assets
Goodwill and other impairments		4.1
Land segment
Identifiable intangible assets
Goodwill and other impairments		$ 3.0