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Commitments And Contingencies (Nuclear Insurance) (Details) - Diablo Canyon [Member]
$ in Thousands
9 Months Ended
Sep. 30, 2016
USD ($)
Long-term Purchase Commitment [Line Items]  
Maximum Aggregate Annual Retrospective Premium Obligation $ 60,000
EMANI Policy Limit 200,000
EMANI Possible Retrospective Assesment $ 2,100