Trade Accounts Receivable Securitization and Sale Programs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Trade Accounts Receivable Sale Programs
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Trade accounts receivable sold	$ 700.0	$ 500.0	$ 3,000.0	$ 1,500.0
Cash proceeds for the sale of trade accounts receivable	700.0	500.0	$ 2,900.0	1,500.0
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	2,000.0	1,900.0	$ 5,800.0	5,600.0
Cash proceeds for the sale of trade accounts receivable	1,500.0	1,500.0	5,300.0	5,200.0
Cash proceeds from new transfers			3.0	5.9
Deferred purchases price receivable	517.3	438.5	517.3	438.5
Pretax losses on sale of trade accounts receivable	1.3	$ 1.2	$ 3.5	$ 2.8
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		$ 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		$ 275.0
Foreign Asset-Backed Securitization Program | Before amendment
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	175.0		175.0
Foreign Asset-Backed Securitization Program | After amendment
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	275.0		$ 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			Nov. 01, 2016
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	650.0		$ 650.0
Minimum number of days notice required to cancel receivable sale agreements			15 days
Agreement extension date			Aug. 31, 2017
Minimum number of days notice required to not automatically extend receivable sale agreements			30 days
650.0 Million Dollar Trade Accounts Receivable Sale Program | Trade Accounts Receivable Sale Programs | Before amendment
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	450.0		$ 450.0
650.0 Million Dollar Trade Accounts Receivable Sale Program | Trade Accounts Receivable Sale Programs | After amendment
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	650.0		$ 650.0
150.0 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, 2016
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	150.0		$ 150.0
100.0 Million Dollar Trade Accounts Receivable Sale Program | Trade Accounts Receivable Sale Programs
Trade Accounts Receivable Securitization and Sale Program [Line Items]
Expiration date			Nov. 01, 2016
Maximum net cash proceeds available at any one time under asset-backed securitization program and sales program	$ 100.0		$ 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