Notes Payable and Long-Term Debt - Schedule of Interest, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Debt Disclosure [Abstract]
Interest Expense	$ 49.3	$ 39.2	$ 130.2	$ 117.4
Capitalized interest	$ (1.7)	$ (1.6)	$ (4.8)	$ (4.7)