Basis Of Presentation Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Adoption of New Accounting Standards [Abstract]
Deferred Tax Assets, Other	$ 11.0
Deferred Tax Liabilities, Other	36.9
Adjustments to Additional Paid in Capital, Other	2.5
adjustments to accumulated deficit	45.4
Deferred Tax Asset for previously unrecognized excess tax benefits	47.9
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition	$ 2.5
excess tax benefit related to stock based compensation		$ 6.0