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DERIVATIVES- Terminated Interest Rate Swaps (Details) $ in Millions | Sep. 15, 2016 USD ($) | Jul. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Feb. 01, 2016 USD ($) contracts | Jul. 01, 2012 USD ($) | Aug. 09, 2011 USD ($) contracts
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Derivative Instruments and Hedging Activities Disclosure |  |  |  |  |  |
Aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a net liability position |  | $ 2 |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge |  | 0 | $ 7 |  |  |
Senior Notes 2020 |  |  |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge |  | 4 | 7 |  |  |
Senior Notes 2020 | Interest Rate Swap | Derivatives Designated as Hedging Instrument | Fair Value Hedging |  |  |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Number of interest rate swap contracts terminated | contracts |  |  |  |  |  | 5
Notional amount of contract |  |  |  |  |  | $ 500
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge |  | 4 |  |  |  |
Senior Notes 2022 |  |  |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge |  | 0 | 0 |  |  |
Senior Notes 2022 | Treasury Lock [Member] | Derivatives Designated as Hedging Instrument | Cash Flow Hedging |  |  |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Notional amount of contract |  |  |  |  | $ 400 |
Remaining gain (loss) to be amortized on derivative |  | 1 |  |  |  |
Senior Notes 2026 |  |  |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge |  | 0 | $ 0 |  |  |
Senior Notes 2026 | Interest Rate Swap | Derivatives Designated as Hedging Instrument | Cash Flow Hedging |  |  |  |  |  |
Terminated Derivative Contracts |  |  |  |  |  |
Number of interest rate swap contracts terminated | contracts |  |  |  | 3 |  |
Notional amount of contract |  |  |  | $ 300 |  |
Interest rate swap payments | $ 10 |  |  |  |  |
Remaining gain (loss) to be amortized on derivative |  | $ 7 |  |  |  |

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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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- Definition Amount as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective interest rate fair value hedge that is amortized upon discontinuation of the interest rate fair value hedge. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 35 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=118957181&loc=d3e75592-113984 + Details
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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959 + Details
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