Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Number of U.S Plans	2
Net underfunded status	$ 73,900,000
Amount not yet recognized and expected to be recognized in net periodic pension expense, actuarial loss	202,600,000
Amount not yet recognized and expected to be recognized in net periodic pension expense, prior service cost	3,800,000
Amount not yet recognized and expected to be recognized in net periodic pension expense, unrecognized transition obligations	2,400,000
Accumulated benefit obligation for all defined benefit pension plans	423,600,000	365,200,000
Accumulated benefit obligations in excess of plan assets, projected benefit obligation	347,500,000	294,200,000
Accumulated benefit obligations in excess of plan assets, accumulated benefit obligation	335,100,000	282,300,000
Accumulated benefit obligations in excess of plan assets, fair value of plan assets	277,500,000	262,400,000
Percentage of U.S. pension plan to entity's total plan assets	71.00%	71.00%
Percentage of U.S. pension plan to entity's total projected benefit obligation	74.00%	72.00%
Company's average	10 years
Effect of one-percentage point increase in health care cost trend rate impact on increase liability	100,000	100,000
Deferred compensation arrangement with individual, maximum future deferred receipts allowed	75.00%
Deferred compensation arrangement with individual, recorded liability	9,500,000	9,200,000
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets	7.50%	7.75%
Company's contributions to pension plans	25,500,000
Estimated future contributions to pension plans	13,500,000
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Company's contributions to pension plans	12,500,000
Estimated future contributions to pension plans	7,000,000
High Yield Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Component of fixed income securities, in percentage	10.00%
Foreign Currencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Component of fixed income securities, in percentage	20.00%
U.S. Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability recorded for postretirement benefit plan	1,500,000	1,500,000
Health care cost rate assumed for Fiscal 2012	7.30%
Ultimate annual rate	4.50%
Contributory Employee Saving Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company's contributions to pension plans	5,500,000	9,100,000	4,500,000
Contributory employee saving plan, employee contribution threshold limit from compensation, maximum	25.00%
Contributory Employee Saving Plan [Member] | U.S. Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributory employee saving plan, percentage match of participants, first contributions	100.00%
Contributory employee saving plan, percentage match of participants, second contributions	50.00%
Contributory employee saving plan, percentage of participants, first eligible compensation	3.00%
Contributory employee saving plan, percentage of participants, second eligible compensation	2.00%
Global Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	45.00%
Global Equity Securities [Member] | International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Distribution between UK and overseas	50/50
Strategic asset allocation	15.00%
Global Equity Securities [Member] | Long/Short Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	15.00%
Global Equity Securities [Member] | Small Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	10.00%
Global Equity Securities [Member] | Large Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	5.00%
Private Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	5.00%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	30.00%
Real Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	10.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation	10.00%
Fiscal 2013 [Member]
Defined Benefit Plan Disclosure [Line Items]
Amount not yet recognized and expected to be recognized in net periodic pension expense, actuarial loss	10,300,000
Amount not yet recognized and expected to be recognized in net periodic pension expense, prior service cost	400,000
Amount not yet recognized and expected to be recognized in net periodic pension expense, unrecognized transition obligations	$ 200,000
Below Company's Average [Member]
Defined Benefit Plan Disclosure [Line Items]
Company's average	20 years
Above Company's Average [Member]
Defined Benefit Plan Disclosure [Line Items]
Company's average	5 years
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Component of equity/fixed income securities in international pension plan, in percentage	40.00%
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Fixed Income Securities [Member] | International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Component of equity/fixed income securities in international pension plan, in percentage	60.00%
Significant Unobservable Inputs (Level 3) [Member] | International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation, equity securites, minimum	10.00%
Strategic asset allocation, equity securities, maximum	20.00%
Strategic asset allocation, fixed income securities, minimum	80.00%
Strategic asset allocation, fixed income securities, maximum	90.00%