Related Party Transactions (Details) - Dow $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)
Related party transactions
Payment amount for services	$ 5.8	$ 10.0
Outstanding payable	2.5	2.5
Ongoing costs of the Transition Services Agreement
Related party transactions
Payment amount for services	1.6	4.4
Outstanding payable	0.6	0.6
Rent and second employee expense | Ongoing costs of the Transition Services Agreement
Related party transactions
Outstanding payable	0.1	0.1
Rent | Ongoing costs of the Transition Services Agreement
Related party transactions
Payment amount for services	0.3	1.0
Second employee expense | Ongoing costs of the Transition Services Agreement
Related party transactions
Payment amount for services	0.6	1.3
Other Expense | Ongoing costs of the Transition Services Agreement
Related party transactions
Payment amount for services	3.3	3.3
Outstanding payable	$ 1.8	$ 1.8