Trade Accounts Receivable Securitization and Sale Programs (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
Trade Accounts Receivable Sale Programs
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Trade accounts receivable sold	$ 900.0	$ 1,400.0
Cash proceeds for the sale of trade accounts receivable	900.0	1,400.0
Pretax losses on sale of trade accounts receivable	$ (1.2)	(1.0)
Asset-Backed Securitization Programs
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Percentage of trade accounts receivable sold to conduits by special purpose entities	100.00%
Trade accounts receivable sold	$ 2,300.0	1,900.0
Cash proceeds for the sale of trade accounts receivable	1,600.0	1,500.0
Deferred purchases price receivable	765.6	451.6
Pretax losses on sale of trade accounts receivable	$ (1.8)	$ (1.0)
North American Asset-Backed Securitization Program
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Expiration date	Oct. 20, 2017
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 200.0
Foreign Asset-Backed Securitization Program
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Expiration date	May 01, 2018
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 275.0
650.0 Million Dollar Trade Accounts Receivable Sale Program | Trade Accounts Receivable Sale Programs
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Expiration date	Aug. 31, 2017
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 650.0
150.0 Million Dollar Trade Accounts Receivable Sale Program
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Expiration date	Aug. 31, 2017
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 150.0
100.0 Million Dollar Trade Accounts Receivable Sale Program
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Expiration date	Oct. 31, 2017
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 100.0
Minimum number of days notice required to cancel receivable sale agreements	15 days
Agreement extension date	Nov. 01, 2018
Minimum number of days notice required to not automatically extend receivable sale agreements	30 days