Commitments And Contingencies (Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013	Sep. 30, 2014	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, 2014	$ 17.1
Operating Leases, 2013	13.8
Operating Leases, 2014	8.3
Operating Leases, 2015	5.5
Operating Leases, 2019	4.1
Operating Leases, Thereafter	14.9
Operating Leases, Future Minimum Payments Due, Total	63.7
Rental expense	$ 0.0	$ 0.0	$ 0.0
Airplane Operating Lease Period Years		5
Residual value guarantee liability				$ 7.8
Fair Value Of Residual Value Guarantee, Fair Value of Operating Lease Asset Threshold				$ 9.5
ResidualValueGuaranteePayment					$ 9.5