Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Apr. 30, 2015	Apr. 30, 2014
Net cash provided by (used in) operations	$ (237)	$ (326)
Net change in restricted cash and cash equivalents	53	(21)
Net sales of marketable securities	332	296
Capital expenditures and purchase of equipment leased to others	(65)	(158)
Other investing activities	12	25
Net cash provided by investing activities	332	142
Net borrowings (repayments) of debt	16us-gaap_ProceedsFromRepaymentsOfDebt	11us-gaap_ProceedsFromRepaymentsOfDebt
Net cash provided by financing activities	17	33
Effect of exchange rate changes on cash and cash equivalents	(26)	(10)
Increase (decrease) in cash and cash equivalents	86	(161)
Increase (decrease) in cash and cash equivalents	497	755
Cash and cash equivalents at beginning of the period	583nav_CashAndCashEquivalentsAtEndOfPeriod	594nav_CashAndCashEquivalentsAtEndOfPeriod
Other financing activities	1	22
Parent Company [Member]
Net cash provided by (used in) operations	(168)	(458)
Net change in restricted cash and cash equivalents	1	5
Net sales of marketable securities	229	389
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by investing activities	230	394
Net borrowings (repayments) of debt	0	(10)
Net cash provided by financing activities	0	8
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	62	(56)
Increase (decrease) in cash and cash equivalents	101	336
Cash and cash equivalents at beginning of the period	163	280
Other financing activities	0	18
Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	41	(961)
Net change in restricted cash and cash equivalents	(2)	(1)
Net sales of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	(30)	(67)
Other investing activities	7	8
Net cash provided by investing activities	(25)	(60)
Net borrowings (repayments) of debt	(52)	959
Net cash provided by financing activities	(32)	993
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	(16)	(28)
Increase (decrease) in cash and cash equivalents	53	72
Cash and cash equivalents at beginning of the period	37	44
Other financing activities	20	34
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	(188)	85
Net change in restricted cash and cash equivalents	54	(25)
Net sales of marketable securities	103	(93)
Capital expenditures and purchase of equipment leased to others	(35)	(91)
Other investing activities	5	17
Net cash provided by investing activities	127	(192)
Net borrowings (repayments) of debt	66	68
Net cash provided by financing activities	127	38
Effect of exchange rate changes on cash and cash equivalents	(26)	(8)
Increase (decrease) in cash and cash equivalents	40	(77)
Increase (decrease) in cash and cash equivalents	343	347
Cash and cash equivalents at beginning of the period	383	270
Other financing activities	61	(30)
Consolidation, Eliminations [Member]
Net cash provided by (used in) operations	78	1,008
Net change in restricted cash and cash equivalents	0	0
Net sales of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by investing activities	0	0
Net borrowings (repayments) of debt	2	(1,006)
Net cash provided by financing activities	(78)	(1,006)
Effect of exchange rate changes on cash and cash equivalents	0	(2)
Increase (decrease) in cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of the period	0	0
Other financing activities	$ (80)	$ 0

Cash and cash equivalents at beginning of the period

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Cash and cash equivalents at end of the period

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Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

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Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.

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The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The net cash paid (received) associated with the acquisition or disposal of all investments, including securities and other assets.

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The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

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