Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Oct. 01, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Loss Contingencies [Line Items]
Amount accrued		$ 2.8		$ 2.2
Amount accrued current portion		2.8		2.2
2017				$ 48.0
Transportation capacity agreements	$ 1.6	$ 52.9	$ 36.5