Related Parties - Omnibus Agreement (Details) - OpCo - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2017	Nov. 30, 2016
Related Party Transaction [Line Items]
Cash received as indemnity	$ 3.9		$ 10.3
Kern Phase 1(a)
Related Party Transaction [Line Items]
Cash received as indemnity		$ 0.2	0.3
Energy performance test bonus
Related Party Transaction [Line Items]
Cash received as indemnity		$ 0.2
Network upgrade refunds
Related Party Transaction [Line Items]
Cash received as indemnity			$ 10.0