Derivative Financial Instruments (Narrative) (Details) $ in Millions	3 Months Ended
Jun. 30, 2015 USD ($)
Trading Activity, Gains and Losses, Net [Line Items]
Proceeds from Termination of Interest Rate Derivatives	$ 2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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