Legal Matters (Details)	3 Months Ended
	Feb. 28, 2017 USD ($) a
Nevada Development Contract Litigation
Loss Contingencies [Line Items]
Acres of purchased land by LVDA | a	83
Expected interest charges	$ 41,000,000
San Diego Region (Basin Plan) [Domain]
Loss Contingencies [Line Items]
Site Contingency, Loss Exposure Not Accrued, Low Estimate	100,000
Maximum [Member] | Nevada Development Contract Litigation
Loss Contingencies [Line Items]
Expected compensatory damages	$ 55,000,000