Consolidated Statements of Comprehensive Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax	$ 4,123	$ 71	$ 4,375	$ 91
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax expense (benefit)	(265)	331	917	338
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax expense (benefit)	(7,110)	261	(9,042)	352
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax expense (benefit)	$ (1,760)	$ 629	$ (1,531)	$ 663