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Legal Matters (Details) $ in Millions | 6 Months Ended
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May 31, 2017 USD ($) a
Nevada Development Contract Litigation |
Loss Contingencies [Line Items] |
Acres of purchased land by LVDA | a | 83
Expected interest charges | $ 41.0
San Diego Region (Basin Plan) [Domain] |
Loss Contingencies [Line Items] |
Litigation Settlement, Amount | 0.3
Maximum [Member] | Nevada Development Contract Litigation |
Loss Contingencies [Line Items] |
Expected compensatory damages | $ 55.0

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