XML 49 R38.htm IDEA: XBRL DOCUMENT v3.5.0.2
Financial Derivatives (Narrative) (Details)
€ in Millions, ZAR in Millions, $ in Millions
3 Months Ended 9 Months Ended
May 31, 2016
USD ($)
May 31, 2015
USD ($)
May 31, 2016
USD ($)
May 31, 2015
USD ($)
May 31, 2016
ZAR
May 31, 2016
EUR (€)
Aug. 31, 2015
USD ($)
Aug. 31, 2015
ZAR
Aug. 31, 2015
EUR (€)
May 31, 2015
ZAR
May 31, 2015
EUR (€)
Derivatives, Fair Value [Line Items]                      
Realized and unrealized after-tax gains included in AOCI $ 5.9 $ 5.6 $ 5.9 $ 5.6     $ 5.4        
Outstanding foreign currency forward contracts to sell         ZAR 43.0 € 28.5   ZAR 43.0 € 29.1 ZAR 43.0 € 29.2
Foreign Currency Forward Contracts [Member]                      
Derivatives, Fair Value [Line Items]                      
Derivative contracts resulting in after-tax net (loss) gain (1.4) 2.3 (0.2) 4.1              
Derivative contracts ineffective amount 0.0 0.0 0.0 0.0              
Outstanding foreign currency forward contracts to sell $ 8.4 $ 4.8 $ 8.4 $ 4.8     $ 9.5