| **Stockholders' Deficit**                         | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
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| **Equity [Abstract]**                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Stockholders' Equity Note Disclosure [Text Block] | Stockholders' DeficitAccumulated Other Comprehensive Loss Changes in 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)The following table displays the amounts reclassified from Accumulated other comprehensive loss and the affected line item in the Consolidated Statements of Operations:  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 |
| Stockholders' Deficit                             |   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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |

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| - Definition
Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).
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No definition available.
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| - Definition
The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.
+ References
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