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Derivative Financial Instruments - Foreign Exchange Contracts Outstanding to Sell Various Currencies (Details) € in Millions, ¥ in Millions, CAD in Millions, $ in Millions | Oct. 31, 2015 JPY (¥) | Oct. 31, 2015 USD ($) | Oct. 31, 2015 EUR (€) | Oct. 31, 2015 CAD | Jan. 31, 2015 JPY (¥) | Jan. 31, 2015 USD ($) | Jan. 31, 2015 EUR (€) | Jan. 31, 2015 CAD | Nov. 01, 2014 JPY (¥) | Nov. 01, 2014 USD ($) | Nov. 01, 2014 EUR (€) | Nov. 01, 2014 CAD
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Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | ¥ 850 | $ 1,731 | [1] | € 2 | CAD 45 | ¥ 0 | $ 1,395 | [1] | € 1 | CAD 14 | ¥ 0 | $ 1,615 | [1] | € 1 | CAD 14
[1] | The principal currencies hedged against changes in the U.S. dollar were British pounds, Canadian dollars, Euro, and Japanese yen.

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- References No definition available. + Details
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