Note 16 - Accounting for Claims, Unapproved Change Orders and Incentives on Long-Term Construction Contracts (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2012
Backfill Costs [Member]
Nov. 30, 2012
COL Issuance Delays [Member]
Nov. 30, 2012
Consortium [Member]
Nov. 30, 2012
Incentive Fee Arrangements [Member]
Aug. 31, 2012
Incentive Fee Arrangements [Member]
Increase (Decrease) in Principal Payments on Contract Receivables $ 29.0 $ 96.0      
Unbilled Change Orders, Amount Expected to be Collected within One Year     293.0    
Management Fees, Incentive Revenue       67.7 78.2
Deferred Revenue, Revenue Recognized       $ 40.7 $ 48.0