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Debt (Narrative) (Details) |  |  |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 24, 2015 USD ($) | Aug. 04, 2014 USD ($) | Sep. 12, 2013 USD ($) | May. 31, 2012 USD ($) | Jan. 12, 2011 | Jul. 31, 2015 USD ($) | Oct. 31, 2014 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Required minimum Interest coverage ratio |  |  |  |  |  | 3.00 |
Required maximum total leverage ratio |  |  |  |  |  | 3.75 |
Interest coverage ratio |  |  |  |  |  | 33.87 |
Total leverage ratio |  |  |  |  |  | 2.33 |
Amount available under the credit agreement |  |  |  |  |  | $ 930,000,000 |
Term loans |  |  |  |  |  | 1,000,000,000 | $ 1,000,000,000
Short-term debt |  |  |  |  |  | 237,558,000 | $ 101,518,000
Minimum [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Commitment fee percentage |  |  |  | 0.10% |  |  |
Line of credit facility interest rate margin on base rate loans percentage |  |  |  | 0.00% |  |  |
Line of credit facility interest rate margin on foreign currency loans percentage |  |  |  | 1.00% |  |  |
Maximum [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Commitment fee percentage |  |  |  | 0.275% |  |  |
Line of credit facility interest rate margin on base rate loans percentage |  |  |  | 0.75% |  |  |
Line of credit facility interest rate margin on foreign currency loans percentage |  |  |  | 1.75% |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Line of credit facility, initiation date |  |  |  |  | Jan. 12, 2011 |  |
Aggregate commitment amount of credit facility |  |  |  | $ 1,000,000,000 |  |  |
Additional borrowings |  |  |  | $ 500,000,000 |  |  |
Expiration date |  |  |  | May 31, 2017 |  |  |
Term Loan $300M [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, issuance date |  |  | Sep. 12, 2013 |  |  |  |
Debt instrument, maturity date |  |  | Sep. 12, 2018 |  |  |  |
Debt term |  |  | 5 years |  |  |  |
Term loans |  |  | $ 300,000,000 |  |  | 300,000,000 |
Amortization of term loan principal |  |  | 5.00% |  |  |  |
Debt instrument, date of first required payment |  |  | Oct. 31, 2016 |  |  |  |
Term Loan $300M [Member] | Federal Funds Rate [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 0.50% |  |  |  |
Term Loan $300M [Member] | Eurodollar [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 1.00% |  |  |  |
Term Loan $700M [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, issuance date |  | Aug. 04, 2014 |  |  |  |  |
Debt instrument, maturity date |  | Aug. 04, 2017 |  |  |  |  |
Debt term |  | 3 years |  |  |  |  |
Term loans |  | $ 700,000,000 |  |  |  | 700,000,000 |
Term Loan $700M [Member] | Federal Funds Rate [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 0.50% |  |  |  |  |
Term Loan $700M [Member] | Eurodollar [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.00% |  |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Aggregate commitment amount of credit facility | $ 100,000,000.0 |  |  |  |  |  |
Debt instrument, issuance date | Mar. 24, 2015 |  |  |  |  |  |
Debt instrument, maturity date | Mar. 24, 2016 |  |  |  |  |  |
Debt term | 90 days |  |  |  |  |  |
Short-term debt |  |  |  |  |  | $ 200,000,000 |
Line of Credit [Member] | Eurodollar [Member] |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate | 0.90% |  |  |  |  |  |

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