Consolidated Statements of Comprehensive Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax	$ 2,042	$ 4,123	$ 4,366	$ 4,375
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax expense (benefit)	88	(265)	476	917
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax expense (benefit)	(1,336)	(7,110)	(1,485)	(9,042)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax expense (benefit)	$ (3,576)	$ (1,760)	$ (6,786)	$ 1,531