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Fair Value Level 4 (Details) - Fair Value Hierarchy (Maximum [Member], Fair Value Inputs, Level 2 [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015
Maximum [Member] \| Fair Value Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities	$ 1

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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