Commitments and Contingencies Commitments and Contingencies - Environmental Textuals (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Environmental related assets	$ 33.4	$ 10.8
Discontinued Operations [Member]
Accrual for Environmental Loss Contingencies, Increase (Decrease) for Revision in Estimates	0.7	(0.9)
Environmental Issue [Member]
Gross Settlement with Insurance Provider for Environmental Matters	34.2
Settlement Agreement with Insurer, Amount Received in Cash	2.0
Settlement Agreement with Insurer, Amount Deposited in Qualified Settlement Fund	32.2
Settlement Agreement with Insurer, Deferred Income	23.0
Environmental-Related Receivable from Other Third Parties	2.0
Environmental related assets	$ 33.4	$ 10.8