Receivables (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 13.9	$ 37.2
Additions — charged to expense	2.7	5.9
Transfer to long-term allowance		(29.2)
Net Recoveries and write-offs	0.6
Ending Balance	17.2	13.9
Accounts Receivable, Net, Noncurrent	102.5
Allowance for long term customer receivables [Roll Forward]
Beginning balance	29.2	0.0
Additions - charged to expense	4.1	29.2
Net Recoveries and write- offs	0.0	0.0
Ending balance	$ 33.3	$ 29.2