Commitments and Contingencies - Narrative - Environmental Matters (Details)						12 Months Ended		36 Months Ended	163 Months Ended
	Feb. 28, 2015 a	Sep. 20, 2011 unilateral_administrative_order	Mar. 14, 2008 a	May. 09, 2002	Jun. 30, 2000 respondent water_company	Nov. 30, 2015 USD ($) LegalMatter	Dec. 31, 2002 USD ($) a	Dec. 31, 1997 respondent	Nov. 30, 2015 USD ($) respondent	Nov. 30, 2014 USD ($)	Mar. 28, 2014	Mar. 27, 2014	Nov. 30, 2013 USD ($)	Nov. 30, 2012 USD ($)	Oct. 31, 2001 USD ($)
Site Contingency [Line Items]
Accrued environmental costs						$ 306,100,000			$ 306,100,000	$ 166,000,000			$ 171,300,000	$ 189,500,000
Guarantee obligations						$ 120,000,000.0			120,000,000.0
Non-contaminated land | a	6,000
Various Environmental Matters [Member]
Site Contingency [Line Items]
Number of environmental remediation matters (over) | LegalMatter						40
Environmental remediation term						15 years
Accrued environmental costs						$ 306,100,000			306,100,000
Various Environmental Matters [Member] | Sacramento, California [Member]
Site Contingency [Line Items]
Accrued environmental costs						153,000,000			153,000,000
Guarantee obligations							$ 75,000,000
Various Environmental Matters [Member] | Sacramento, California [Member] | Environmental Protection Agency [Member]
Site Contingency [Line Items]
Non-contaminated land | a							2,600
Number of Unilateral Administrative Orders | unilateral_administrative_order		2
Various Environmental Matters [Member] | Sacramento, California [Member] | Department of Toxic Substances Control [Member]
Site Contingency [Line Items]
Non-contaminated land | a			400
Various Environmental Matters [Member] | Sacramento, California [Member] | Previously Reported [Member]
Site Contingency [Line Items]
Guarantee obligations							$ 20,000,000
Various Environmental Matters [Member] | Baldwin Park Operable Unit [Member]
Site Contingency [Line Items]
Accrued environmental costs						$ 140,100,000			$ 140,100,000
Guarantee obligations															$ 25,000,000
Number of other respondents | respondent									2
Number of water companies | water_company					5
Management agreement terms				15 years
Various Environmental Matters [Member] | Baldwin Park Operable Unit [Member] | Aerojet Rocketdyne, Inc. [Member]
Site Contingency [Line Items]
Percentage of responsibility in all project costs						74.00%			74.00%		70.00%	68.00%
Various Environmental Matters [Member] | Baldwin Park Operable Unit [Member] | Environmental Protection Agency [Member]
Site Contingency [Line Items]
Number of other respondents | respondent					7			18
Various Environmental Matters [Member] | Wabash, Indiana [Member]
Site Contingency [Line Items]
Accrued environmental costs						$ 300,000			$ 300,000
Expenditures recoverable						$ 0
Various Environmental Matters [Member] | Contracting business [Member]
Site Contingency [Line Items]
Environmental obligation funding percent						98.00%			98.00%
Various Environmental Matters [Member] | Minimum [Member]
Site Contingency [Line Items]
Estimated environmental costs						$ 306,100,000			$ 306,100,000
Various Environmental Matters [Member] | Minimum [Member] | Sacramento, California [Member]
Site Contingency [Line Items]
Estimated environmental costs						153,000,000			153,000,000
Various Environmental Matters [Member] | Minimum [Member] | Baldwin Park Operable Unit [Member]
Site Contingency [Line Items]
Estimated environmental costs						140,100,000			140,100,000
Various Environmental Matters [Member] | Minimum [Member] | Wabash, Indiana [Member]
Site Contingency [Line Items]
Estimated environmental costs						300,000			300,000
Various Environmental Matters [Member] | Maximum [Member]
Site Contingency [Line Items]
Estimated environmental costs						457,400,000			457,400,000
Various Environmental Matters [Member] | Maximum [Member] | Sacramento, California [Member]
Site Contingency [Line Items]
Estimated environmental costs						253,000,000			253,000,000
Various Environmental Matters [Member] | Maximum [Member] | Baldwin Park Operable Unit [Member]
Site Contingency [Line Items]
Estimated environmental costs						183,900,000			183,900,000
Various Environmental Matters [Member] | Maximum [Member] | Wabash, Indiana [Member]
Site Contingency [Line Items]
Estimated environmental costs						$ 800,000			$ 800,000