Commitments and Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) Years	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Operating Leases, Rent Expense	$ 9.6	$ 10.1	$ 7.4
Asset Retirement Obligation [Abstract]
Balance, beginning of period	4.8	1.6
Asset Retirement Obligation, Reclassified from Discontinued Operations	0.0	10.9
Liabilities settled	(2.0)	(5.0)
Revisions to estimated cash flow	(1.1)	(2.9)
Accretion expense	0.1	0.2
Balance, end of period	1.8	4.8	$ 1.6
Letters of Credit Outstanding, Amount	$ 6.3
Long-term Purchase Commitments, Range of Years, Minimum | Years	1
Long-Term Purchase Commitments, Range of Years, Maximum | Years	3
Long-term Purchase Commitment, Amount	$ 191.0	166.0
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017	4.1
2018	2.9
2019	2.6
2020	2.3
2021	2.2
Thereafter	19.8
Total	33.9
Retail Store [Member]
Operating Leases, Rent Expense	$ 0.6	$ 0.8