Condensed Consolidated Statements of Operations (parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Affiliate cost of sales	$ 732.4	$ 968.2	$ 1,318.6	$ 1,625.6
Affiliate operating expenses	100.1	109.1	198.3	207.6
Affiliate general and administrative	30.3	28.1	65.4	70.8
Affiliated Entity [Member]
Affiliate cost of sales	49.8	32.0	92.4	39.9
Affiliate operating expenses	0.2	0.2	0.3	0.2
Affiliate general and administrative	$ 0.0	$ 0.1	$ 0.0	$ 0.1