Goodwill And Identifiable Intangibles (Narrative) (Details) $ in Millions	3 Months Ended
Jun. 30, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0.0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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