| **Stockholders' Deficit (Tables) (Tables)**                                       | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Equity [Abstract]**                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]      | Accumulated other comprehensive loss, net of tax, included in the Consolidated Statements of Stockholders' Deficit, consisted of the following: (in millions)Unrealized Gain on Marketable Securities Foreign Currency Translation Adjustments Defined Benefit Plans TotalBalance as of April 30, 2015$1 $(213) $(2,072) $(2,284)Other comprehensive loss before reclassifications— (47) — (47)Amounts reclassified out of accumulated other comprehensive loss— — 33 33Net current-period other comprehensive income (loss)— (47) 33 (14)Balance as of July 31, 2015$1 $(260) $(2,039) $(2,298)(in millions)Unrealized Gain on Marketable Securities Foreign Currency Translation Adjustments Defined Benefit Plans TotalBalance as of October 31, 2014$1 $(127) $(2,137) $(2,263)Other comprehensive loss before reclassifications— (133) — (133)Amounts reclassified out of accumulated other comprehensive loss— — 98 98Net current-period other comprehensive income (loss)— (133) 98 (35)Balance as of July 31, 2015$1 $(260) $(2,039) $(2,298)(in millions)Foreign Currency Translation Adjustments Defined Benefit Plans TotalBalance as of April 30, 2014$(89) $(1,699) $(1,788)Other comprehensive income (loss) before reclassifications(3) 7 4Amounts reclassified out of accumulated other comprehensive loss— 26 26Net current-period other comprehensive income (loss)(3) 33 30Balance as of July 31, 2014$(92) $(1,666) $(1,758)(in millions)Foreign Currency Translation Adjustments Defined Benefit Plans TotalBalance as of October 31, 2013$(75) $(1,749) $(1,824)Other comprehensive income (loss) before reclassifications(17) 5 (12)Amounts reclassified out of accumulated other comprehensive loss— 78 78Net current-period other comprehensive income (loss)(17) 83 66Balance as of July 31, 2014$(92) $(1,666) $(1,758) |
| Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |   Location in Consolidated Statements of Operations Three Months Ended July 31, 2015 Nine Months Ended July 31, 2015Defined benefit plans      Amortization of prior service benefit Selling, general and administrative expenses $(1) $(3)Amortization of actuarial loss Selling, general and administrative expenses 34 102  Total before tax 33 99  Tax expense — (1)Total reclassifications for the period, net of tax $33 $98  Location in Consolidated Statements of Operations Three Months Ended July 31, 2014 Nine Months Ended July 31, 2014Defined benefit plans      Amortization of prior service benefit Selling, general and administrative expenses $(1) $(3)Amortization of actuarial loss Selling, general and administrative expenses 28 82  Total before tax 27 79  Tax benefit (1) (1)Total reclassifications for the period, net of tax $26 $78                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |

| X                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - References
No definition available.
+ Details**Name:**us-gaap_EquityAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).
+ References
No definition available.
+ Details**Name:**us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock**Namespace Prefix:**us-gaap_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Tabular disclosure of the components of accumulated other comprehensive income (loss).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580
+ Details**Name:**us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock**Namespace Prefix:**us-gaap_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |