Accumulated Other Comprehensive Loss (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Beginning Balance, net of tax $ (45,810) $ (37,473)
Other comprehensive (loss) income before reclassifications and tax (82,704) 1,248
Tax benefit (expense) (3,171) (2,779)
Other comprehensive (loss) income before reclassifications, net of tax (85,875) (1,531)
Ending Balance, net of tax (128,878)  
Reclassification Out Of Accumulated Other Comprehensive Income [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassifications, before tax 4,663 [1] 5,183
Tax benefit (expense) (1,856) (1,554)
Reclassifications, net of tax 2,807 3,629
Other comprehensive (loss) income, net of tax (83,068) 2,098
Ending Balance, net of tax (128,878) (35,375)
Foreign Currency Translation Adjustment [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Beginning Balance, net of tax 48,289 [2] 50,411 [2]
Other comprehensive (loss) income before reclassifications and tax (96,539) [2] (5,935) [2]
Other comprehensive (loss) income before reclassifications, net of tax (96,539) [2] (5,935) [2]
Foreign Currency Translation Adjustment [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassifications, before tax   827 [2]
Reclassifications, net of tax   827 [2]
Other comprehensive (loss) income, net of tax (96,539) [2] (5,108) [2]
Ending Balance, net of tax (48,250) [2] 45,303 [2]
Pension Benefits [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Beginning Balance, net of tax (93,998) (87,712)
Other comprehensive (loss) income before reclassifications and tax 11,795 7,122
Tax benefit (expense) (2,457) (2,758)
Other comprehensive (loss) income before reclassifications, net of tax 9,338 4,364
Pension Benefits [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassifications, before tax 4,843 4,520
Tax benefit (expense) (1,905) (1,614)
Reclassifications, net of tax 2,938 [3] 2,906 [3]
Other comprehensive (loss) income, net of tax 12,276 7,270
Ending Balance, net of tax (81,722) [3] (80,442)
Derivative Financial Instruments [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Beginning Balance, net of tax (101) (172)
Other comprehensive (loss) income before reclassifications and tax 2,040 61
Tax benefit (expense) (714) (21)
Other comprehensive (loss) income before reclassifications, net of tax 1,326 40
Derivative Financial Instruments [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Reclassifications, before tax (180) (164)
Tax benefit (expense) 49 60
Reclassifications, net of tax (131) (104)
Other comprehensive (loss) income, net of tax 1,195 [4] (64) [4]
Ending Balance, net of tax $ 1,094 $ (236)
[1] Reclassification adjustments out of accumulated other comprehensive income for the three months ended January 31, 2015 and 2014 were not material.
[2] Taxes are not provided on cumulative translation adjustments as substantially all translation adjustments relate to earnings that are intended to be indefinitely reinvested outside the U.S. Amounts were reclassified from accumulated other comprehensive loss to other income, net.
[3] Primarily includes net amortization of prior service costs and actuarial losses included in net periodic benefit cost (see Note K) that were reclassified from accumulated other comprehensive loss to operating expenses or cost of sales.
[4] Relates to foreign currency cash flow hedges that were reclassified from accumulated other comprehensive loss to other income, net (see Note M).