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Basis Of Presentation Basis of Presentation (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Adoption of New Accounting Standards [Abstract]
adjustments to current assets	$ 19.7
adjustments to non current assets	7.6
adjustments to deferred tax liability	4.8
adjustments to accumulated deficit	$ 22.5

X

- Definition

adjustments to accumulated deficit related to the adoption of ASU 2016-09

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- Definition

adjustments to current assets

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X

- Definition

adjustments to deferred tax liability

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- Definition

adjustments to non current assets

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- Definition

Adoption of New Accounting Standards [Abstract]

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