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Legal Matters (Details)
$ in Millions
6 Months Ended
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