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CONTINGENCIES AND COMMITMENTS (Resolution of Remaining Chapter 11 Disputed Claims) (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
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Commitments and Contingencies Disclosure [Abstract] |  |
Disputed claims and customer refunds | $ 245 | $ 243

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- Definition If the amount of accrued interest is greater than the amount of interest ultimately determined to be owed on the remaining net disputed claims, the Utility would refund to customers any excess interest collected. + References No definition available. + Details
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Period Type: | instant

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- References No definition available. + Details
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