Commitments and Contingencies - Narrative (Details)									6 Months Ended	9 Months Ended
	Aug. 29, 2017 USD ($)	Jul. 19, 2017 USD ($)	Apr. 17, 2017 USD ($)	Feb. 07, 2017 plaintiff	Feb. 06, 2017 USD ($)	Dec. 22, 2016 USD ($)	Aug. 01, 2012 USD ($)	Jul. 31, 2012 USD ($)	Jul. 31, 2017 USD ($) plaintiff	Jul. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Standby letters of credit									$ 127,700,000	$ 127,700,000	$ 130,900,000
Surety bonds									$ 523,000,000	$ 523,000,000
Subsidiary ownership interest percentage									33.00%	33.00%
Loss contingency amount accrued for probable losses									$ 71,700,000	$ 71,700,000
Energy Savings Contracts
Loss Contingencies [Line Items]
Guarantee obligation									127,700,000	127,700,000	$ 60,900,000
Performance Guarantee | Joint Venture
Loss Contingencies [Line Items]
Total guarantees									35,000,000	35,000,000
Augustus and Karapetyan
Loss Contingencies [Line Items]
Loss contingency amount accrued for probable losses									60,000,000	60,000,000
Settlement amount										115,000,000
Augustus
Loss Contingencies [Line Items]
Loss contingency amount accrued for probable losses									$ 4,800,000	4,800,000
Payment awarded to plaintiffs							$ 4,500,000	$ 89,700,000
Percentage of damages awarded							30.00%
Reversal of initial award												$ 89,700,000
Settlement interest						$ 41,200,000
Settlement amount					$ 110,000,000
Payments for legal settlements		$ 55,000,000
Karapetyan
Loss Contingencies [Line Items]
Settlement amount			$ 5,000,000
Isse
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff				60					220
Minimum
Loss Contingencies [Line Items]
Amount of reasonably possible loss									$ 0	0
Maximum
Loss Contingencies [Line Items]
Amount of reasonably possible loss									$ 18,000,000	$ 18,000,000
Subsequent Event | Augustus
Loss Contingencies [Line Items]
Payments for legal settlements	$ 55,000,000
Payments for payroll taxes related to settlement	$ 4,800,000