Notes Payable and Long-Term Debt - Schedule of Interest, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Debt Disclosure [Abstract]
Interest Expense	$ 39.2	$ 37.5	$ 117.4	$ 71.6
Capitalized interest	$ (1.6)	$ (6.5)	$ (4.7)	$ (27.3)